1029 results about "Millstone" patented technology

The invention is concerned with simulation diamond end face polishing-grinding machining method and the expert polishing-grinding machining. Set stuff and put molding plastics-absorption tray on fixture tray and make the concave face of plastics-absorption tray upside, and the simulation diamond adsorbs on the convexity of the bottom to plastics-absorption tray. Set plastics-absorption tray on the polishing-grinding machining and mill the tine end of simulation diamond on calm millstone. The polishing-grinding machining relates rack with a level millstone at its middle, and there are two level trays. They are centrosymmetric to the axis of millstone on top of millstone and have plastics-absorption tray on them. There is up and down equipment for tray on top of level tray which connecting with two turning axes on two sides of millstone with level rack, and the other end of turning axis has running equipment of turning axis. It has large machining amount of each time, high produce efficiency, good ratio to excellent stuff, long work time, easy operation without waste of material.

The invention provides an automatic millstone welder, which belongs to the technical field of machinery. The welder solves the problems that welding quality is poor and welding efficiency is low in existing welding process of diamond millstones. The automatic millstone welder comprises a frame and a working platform. A millstone can be fixed on the working platform. A high-frequency induction coil device is disposed on the periphery of the working platform and the high-frequency induction coil device can perform high-temperature heating and welding to the millstone and bit tools. The working platform is driven to rotate by a motor. A correction device which enables the bit tools to be positioned to the millstone accurately is disposed on the periphery of the working platform. A pressing device which can press the bit tools and fix the bit tools on steps of the millstone is disposed right above the working platform. The automatic millstone welder is fine in welding effect, high in welding efficiency, and the welded millstone has high quality.

The invention provides a method for preparing a rubber-plastic compound. A composite device containing normal-temperature millstone-type elastomer fine crushing machineries is utilized to carry out crushing treatment on a mixture containing formulas of thermosetting elastomer and plastic or / and thermoplastic elastomer, and the mixture comprises the following components in weight ratio: thermosetting elastomer sieved by a sieve with the aperture of 5-40 meshes: plastic sieved by a sieve with the aperture of 1-5mm or / and thermoplastic elastomer sieved by a sieve with the aperture of 1-5 meshes:filler: other adjuvants = 40-90:60-10:0-200:0-10. The invention comprises a method, the composite device for implementing the method, and rubber-plastic compound products produced by the method, wherein a regeneration rubber-plastic compound is included. The invention not only can enable the absorb filler operation to become clean, continuous, normal-temperature and energy saving in the process of preparing new rubber-plastic composite material, but also can enable mixed waste plastic difficult to be reused by the prior art to be conveniently used for high-valued recycling.

The invention relates to a diamond surface chemical mechanical combined grinding and polishing method. Composite material is adopted as a tool millstone used for grinding and polishing, the tool millstone is heated to appropriate temperature, and then high speed rotational motion is carried out; certain pressure is utilized to press a diamond film / block to be processed onto the surface of the millstone, so that high speed friction is produced between the diamond film / block and the surface of the millstone, and high efficiency grinding and polishing on the surface of the diamond is realized under the chemical-mechanical combined circulation action of friction region. The method adopts a chemical-mechanical combined way, and the grinding process includes a catalytic surface graphitizing process and a mechanical graphite scraping process. In the combined circulation process of chemical action and mechanical action, diamond surface material is efficiently removed. The related device integrates heating and loading functions, a combined millstone is used as a tool millstone, and the beneficial effects include that processing efficiency is high, mechanical acting force is small and processing quality is good. The invention also relates to a diamond surface chemical mechanical combined grinding and polishing device.

The invention provides a pulping system for environment-friendly mechanical pulp and mechanical chemical pulp of non-woody crops, which comprises a cutting machine, a hammer filament duster, an impregnating washer, an I-section cracking impregnator, an II-section cracking impregnator, an I-section storage reaction bin, an II-section storage reaction bin, a high-concentration impregnating millstone mill, an III-section storage reaction bin and a pulping machine and screening, purification and concentration equipment in a subsequent process, wherein a steaming spiral conveyer, the I-section storage reaction bin, the II-section storage reaction bin and the III-section storage reaction bin are provided with steam injecting pipelines, and liquid medicine injecting pipelines are also arranged at the impregnating washer, the cracking tail end of the I-section cracking impregnator, the cracking tail end of the II-section cracking impregnator and the input position of the high-concentration impregnating millstone mill. A pulping method comprises the following steps of: preparing raw materials, performing pre-steaming spiral conveying, connecting two physical filamentation treatment sections in series, performing high-concentration disc impregnating filamentation treatment, and performing high-concentration pulping, screening, purifying and dehydrating to obtain commercial pulp. The technical scheme has the technical advantages of high yield, no pollution, low energy consumption and the like.

The invention discloses a production line for processing waste rubber and an old tire into rubber powder and a technology thereof, which creatively applies new technologies such as low temperature liquid nitrogen copious cooling waste rubber and old tire freezing crushing method, a hammering low temperature liquid nitrogen copious cooling waste rubber and old tire coarse powder crushing method, a large-scale stone mill roller wheel low temperature rubber medium powder crushing method, a low temperature rubber fine powder crushing method, a rubber fine powder sieve and the like for processing the waste rubber and the old tire into 'rubber powder material' which can be recycled and is used for replacing 'rubber raw material'. The invention changes the unreasonable situation that the existing waste rubber and an old tire device has low processing treatment capacity, high energy consumption, low efficiency, backward technique, certain environmental pollution and low economic benefit of China. The invention provides the production line which is used for processing the waste rubber and the old tire, is the biggest one in the world at present and produces ten thousands of rubber powder material every year, as well as new equipment and new technology that have the advanced technology level at home and abroad and has the advantages of large scale, continuous performance, high efficiency, energy conservation, environmental protection and low cost.

The invention discloses an energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp. The method comprises the following steps that (1) paper pulp fibers are dissolved in water, even defibering is carried out, and then pretreatment is carried out; (2) biological enzymes are added to the treated paper pulp for treatment, the dosage of the biological enzymes ranges from 10 IU / g to 60 IU / g, the temperature ranges from 40 degrees to 60 degrees, the pH value ranges from 6 to 9, the concentration of the paper pulp ranges from 3 wt% to 8 wt%, and treatment is carried out for 10 min to 30 min; (3) continuous millstone milling and beating are carried out on the pulp of the step (2), and the pulp is stored for standby application. The method remarkably improves the efficiency of subsequent biological enzyme treatment, and overcomes the defects that enzyme treatment time is too long in biological enzyme assistant defibrination production and energy conservation in defibrination and the physical strength of finished paper formed by fibers cannot be achieved at the same time, the defibrination energy consumption and the defibrination time for producing the viscous paper pulp are saved, the defibrination energy consumption of chemical bleached needle wood pulp and chemithermomechanical pulp of needle wood is reduced by 15%-45%, and the physical properties of finished paper formed by pulp fibers can be improved.

The invention relates to a straw briquetting forming machine provided with double layers of circular moulds and double layers of compressing rolls. The straw briquetting forming machine is high in work efficiency. When the straw briquetting forming machine works, large motors at two sides are started, the large motors drive small belt pulleys to rotate, the small belt pulleys drive large belt pulleys to rotate through a belt, the large belt pulleys drive a main shaft to rotate, the main shaft drives a millstone to rotate, under the action of friction force of raw materials, the double layers of compressing rolls simultaneously autorotate in the direction opposite to the main shaft, under the common action of revolution and autoroatation of the double layers of compressing rolls, the storage space of the straw materials are compressed continuously, and forming briquettings are squeezed out from mould holes under the frictional action of the materials, the circular moulds and the compressing rolls. The squeezed forming briquettings are divided at two sides by a discharge hopper, fall on conveying mechanisms symmetrically distributed at two sides of a briquetting machine, and finally graded and screened with a sieve to obtain finished products.

The invention relates to a stone mill and a stone mill flour processing process. The stone mill comprises an upper mill disc and a lower mill disc, wherein a feeding hole is formed in the upper mill disc; the bottom surface of the upper mill disc and the top surface of the lower mill disc form milling surfaces; equal fan-shaped areas are formed on the milling surfaces along with the circumferences of the mill discs; a plurality of parallel and contour obliquely-toothed milling edges are carved in each fan-shaped area. Through the stone mill, peel layers and germs of wheat can be peeled quickly and smoothly; seeds of the wheat can be effectively crushed, so that cell walls of the wheat can be protected completely; nutrient substances are not oxidized; the loss of the nutrient substances in the process of milling flour can be reduced; the flour milling efficiency can be improved; rotation speeds of the milling discs can be reduced; the flour milling temperature can be reduced; the loss of the nutrient substances and microelements can be reduced; the flour processed by the stone mill and the processing process is excellent in quality, pure in taste and rich in wheat fragrance.

The invention discloses a stone rolling pulverizing mill, which comprises a stone rolling grinding disc placed on a base, and stone rolling grinding rollers revolving around the working surface of the grinding disc, wherein the base is provided with an enclosed barrel; the barrel is used for coating the grinding disc and the grinding rollers inside; the upper part of the barrel is provided with a feeding hole; a plurality of grinding rollers which are uniformly distributed on the working surface of the grinding disc are in transmission connection with a grinding roller driving device through a middle connecting frame; the edge of the grinding disc is provided with a discharging hole; and a grinding disc motor arranged on the base is used for driving the grinding disc to rotate at a low speed through a transmission assembly. The stone rolling pulverizing mill has the advantages that the grinding rollers and the grinding disc which are made of natural stone are hard, radioactive substances are not contained, the grinding disc and the grinding rollers rotating towards each other at a low speed are used for sucking air while grinding, materials do not cause high temperature, the original wheat flavor of wheat is ensured effectively, and meanwhile, the conventional characteristic of a stone rolling process is reflected. The stone rolling pulverizing mill has a wide application range, and can be used together with one or more flour production lines; and multiple stone rolling pulverizing mills can be combined into a stone rolling flour production line.

The invention discloses a recovery technology and a separation device of a waste lithium iron phosphate battery cathode material. The recovery technology is characterized by firstly separating a lithium iron phosphate material from an aluminum foil by adopting a physical method of heating treatment and mechanical force separation, and then obtaining a novel lithium iron phosphate material by adopting the technologies of fine smashing, dissolving and impurity removing, and roasting, repairing and lithium supplementing; separating and obtaining a lithium iron phosphate recovery material by the separation device through a grinding mode of a millstone. The safe and industrial recovery method and the separation device are provided for recycling of the waste lithium iron phosphate battery cathode material, the material recovery rate can be increased, the cost is reduced, a chemical recovery technology is simplified, the resources are saved, and environment pollution is reduced.

The invention relates to material grinding equipment used in the field of cement production, in particular to an internal screening roll-type vertical mill, comprising a millstone and a grinding roller. The external edges of the millstone are connected with a classification screen. The millstone and the classification screen are covered by two layers of cylinders: an internal cylinder inside and an external cylinder outside. A fine powder cavity is arranged between the classification screen and the internal cylinder. Screen pores of the classification screen are communicated with the fine powder cavity. The outside of the fine powder cavity is communicated with a plurality of fine powder channels distributed on the circumference of the internal cylinder. The fine powder channels pass through an interlayer between the internal cylinder and the external cylinder and extend out from the external cylinder and enter a fine powder outlet. The upper edge of the classification screen is provided with an upper plane. The upper plane extends into the upper end of the interlayer between the internal cylinder and the external cylinder. A crude powder slide carriage is arranged in the interlayer, a lower end of the crude powder slide carriage is led to a crude powder outlet. The material grinding equipment not only assures grinding quality but also avoids energy waste and equipment vibration caused by repeated powder grinding, simplifies the grinding technique and prolongs the service life of the wear parts.

The invention relates to the field of grinding and smashing of a disc type mill, and provides a low-temperature disc mill. The grains are completely refined in the milling process and the feeding efficiency is accelerated. The technical scheme is as follows: the disc mill comprises a frame body, an upper millstone and a lower millstone, wherein the upper millstone and the lower millstone are opposite to each other, opposite surfaces of the upper millstone and the lower millstone form a tapered pre-milling cavity with gradually shrunk aperture and planar structures capable of further refining the grains; the grains are primarily smashed through the pre-milling cavity to form small particles, and then the particles enter between two planar structures to be further refined; the low-temperature disc mill is mainly used for processing the grains, the grains can be gradually refined in the process of passing through the milling region, a good refining effect can be obtained, and the processing efficiency can be greatly promoted.

The invention discloses a hot-pressed ceramic refractory material for a thin-strip continuous casting side sealing plate and a preparation method of the hot-pressed ceramic refractory material. The hot-pressed ceramic refractory material comprises the following raw materials in percentage by mass: 55 to 96 percent of nitride and 4 to 45 percent of filler, wherein the filler is one or more of oxides, oxynitrides, carbo-nitrides and borides. The method comprises the following steps of mixing the nitride with the filler, mixing a mixture with 70 to 100 mass percent of ethanol, acetone or distilled water according to a weight ratio of 1:(1-5), adding ceramic ball millstone, and performing ball milling for 6 to 40 hours to obtain mixed powder; crushing the dried powder, and performing granulation and sieving to obtain spherical particles for later use; carrying out hot pressing and sintering on the spherical particles to obtain a blank, and cutting and grinding the blank to obtain a hot-pressed ceramic refractory material product. According to the hot-pressed ceramic refractory material and the preparation method, the key technical problems of short service life and poor reliability of a side sealing plate material in thin-strip continuous casting production can be solved, the efficient, continuous and stable production requirements of thin-strip continuous casting can be met, and the wide application and popularization of a novel thin-strip continuous casting process are promoted.

The invention discloses a four-head planet dual-operation grinding machine, comprising a mechanical millstone, driving gear shafts, a main driving gear., two transition gears, a sun gear, two planet gears and four driving gears which are occluded with each other, the center distances of the symmetrical gears thereof are unequal and the driving speed ratios are identical, wherein the two driving gear shafts are connected with the two planet gears; under the driving of the main driving gear, the two driving gears rotate while driving the planet gears; the planet gears rotate around the sun gear to achieve the revolution of a planet grinding head; and the main driving gear operates while driving the two transition gears, and the transition gears drive the other two driving gears to form the rotation the direction of which is opposite to that of the other two driving gears. The invention has large polishing extension, mutually offset traction during millstone running, easy and flexible operation, high work efficiency, wide range, prolonged service life, improved grinding and polishing quality and the like.

A nanometre-class polymer / laminated inorganic substance composite material features that it is prepared by use of the millstone-shaped force chemical reactor, which has a unique 3-D shear structure to provide strong squeeze-shear force field for grinding inserting, dispersing, and mixing to prepare the polymer / laminated inorganic substance composite powder, and then the said nanometre-class composite material is prepared by the universal processing method.

The invention discloses a millstone for processing a crystal and a manufacturing method thereof. The millstone for processing the crystal comprises a diamond tool bit arranged on a base body; the base body is an aluminum base body; one or more assembling grooves are formed on the base body; and the diamond tool bit is connected with the base body through a bonding layer. The material of the diamond tool bit comprises components of iron and copper pre-alloyed powder, copper and tin pre-alloyed powder and diamond. The material of the diamond tool bit comprises the following components in percent by weight: 10 to 50 percent of iron and copper pre-alloyed powder and 50 to 90 percent of copper and tin pre-alloyed powder, and when the iron and copper pre-alloyed powder and the copper and tin pre-alloyed powder are mixed into a mixture, the diamond accounting for 2.5 to 3.5 percent of the total weight of the mixture is added into the mixture. The millstone for processing the crystal is mainly used for replacing a conventional electroplated diamond millstone for processing the crystal, and has the characteristics of simple and reasonable structure, longer service life than the electroplated diamond millstone, high sharpness, simple connection of the diamond tool bit, low manufacturing cost, and high production efficiency.

The invention provides a portable dustproof jade polishing device and belongs to the field of jewel processing. The portable dustproof jade polishing device comprises a base. A supporting plate is vertically and fixedly connected on the left side of the upper end face of the base. A rotary table is horizontally arranged at the center of the upper end face of the base. A sliding way body in a horizontal position is fixedly connected on the upper side of the rotary table through a supporting rod. A millstone is used for polishing jade; a glass cover is used for preventing fly-out of dust in the polishing process and is convenient for an operator to observe the internal situation; a first clamping plate and a second clamping plate jointly clamp the jade and enables the edge, needing to be polished, of the jade to abut against the end face of the millstone; when a corner to be polished is linear, a movable rod is slid forth and back along a strip-shaped penetrating opening, the first clamping plate and the second clamping plate slide forth and back jointly by means of a sliding wheel on the lower side, and accordingly the side edge of the jade is polished; and when the corner to be polished is curve, the first clamping plate and the second clamping plate are rotated circumferentially by means of the rotary table connected at the bottom of the sliding way body to polish.

The invention provides a wet method roller type disintegrating mill and a grading closed-circuit process thereof. The wet method roller type disintegrating mill comprises a millstone, milling rollers, a motor, a hydraulic system, a rocker arm, a striker plate and a material receiving groove. The milling rollers are located on the upper surface of the millstone and make contact with the millstone. The milling rollers are connected with the rocker arm. The rocker arm is connected with the hydraulic system. The millstone is connected with the motor through a transmission device. A grading device is connected to a material receiving pipe. The invention further provides an application method for the wet method roller type disintegrating mill. According to the wet method roller type disintegrating mill provided by the invention, the characteristics of a dry method roller type disintegrating mill and the process characteristics of wet method grading are combined, disintegrating milling is conducted through the high-pressure rollers under the condition that the water content of slurry concentration is 30%-70%, a wind grading system of the dry method roller type disintegrating mill is removed, and primary wet method grading is conducted through a baffle or a screen plate in the mill. The wet method roller type disintegrating mill and the grading closed-circuit process thereof are capable of meeting the beneficiation process technical requirements, improving the disintegrating milling efficiency and reducing the power consumption and steel consumption of disintegrating milling.

The invention relates to the field of flour milling equipment and particularly relates to a multi-grade flour mill for processing flour. The multi-grade flour mill comprises a machine body, an initial material storage cabin, a final material storage cabin, a primary milling device, a screening device, a secondary milling device and a hairbrush, wherein the initial material storage cabin is located in the upper middle part of the machine body; the final material storage cabin is located on the right side under the machine body; the primary milling device is located on the left side above the machine body; the screening device is located in the upper middle part of the machine body; the screening device is located above the initial material storage cabin; and the secondary milling device is located on the upper right side of the machine body. According to the multi-grade flour mill, primary milling of a stone mill is utilized and then materials are screened on the screening device; after the screening, the materials are subjected to secondary milling; and flour obtained by milling cereals through secondary milling has relatively small grains so that the flour is fine and smooth and the quality is relatively high.

The invention discloses a new technology for improving tobacco stalk pulping quality, belonging to the technical field of paper-making reconstituted tobacco production. The new technology is implemented according to the following sequences: [1] washing tobacco stalks; [2] performing extraction; [3] performing shoving; [4] pretreating the tobacco stalks by using a multifunctional pulping machine of a double-screw conjugate blade mill, wherein the rotation speed of each screw rod is 100-450rpm; the compression ratio of the front section of each screw rod is 3:1; the rear section of each screw rod is not in compression; and the concentration of outlet tobacco stalk pulp of the tobacco stalks pretreated by the multifunctional pulping machine of the double-screw conjugate blade mill for two times is 35+ / -2%; and [5] milling the pulp by using a millstone mill. The new technology for improving the tobacco stalk pulping quality is rational in method, simple to operate and remarkable in effect; in addition, the pulping quality of the tobacco stalks can be improved remarkably; the tensile strength, the flexibility and the appearance quality of reconstituted tobaccos are improved; the unit energy consumption for subsequent pulping is decreased; and meanwhile, the dosage of additional wood fiber during the production process of the reconstituted tobaccos can be lowered and the sensory quality of the reconstituted tobaccos is improved.

The invention discloses a high-strength fiberboard and a manufacturing method thereof. The manufacturing method comprises the following steps of: grinding an industrial hemp stalk, and then manufacturing fibers through stewing, millstone milling and dehydration; then adding 10-16 percent of adhesives; and then manufacturing the high-strength fiberboard through hot pressing. In the invention, the fiberboard is initiatively manufactured by utilizing the characteristics of high strength, porosity and low density of the industrial hemp stalk; compared with a similar wooden fiberboard product, theproduct disclosed by the invention has the advantages of low density, high strength and good load-bearing property; in addition, by implementing the technology disclosed by the invention, not only the wood resources is outstandingly saved and the ecological environment is protected, but also the wastes are changed into valuables, and a new way for the application of industrial hemps is provided; and the invention is beneficial to promoting the further development of an industrial hemp industry and has good social benefit and economic benefit.

The invention discloses a grinding mechanism of a coffeemaker, which is internally provided with a bean cabin, a grinding body is arranged under the bean cabin and internally provided with a rotatable millstone and a static millstone, the two millstones are both provided with grinding gears, the rotating shaft of a grinding motor is connected with the rotatable millstone, and a powder outlet channel is arranged under a meal outlet. The static millstone is fixed on a static millstone frame which is fixed on a connecting piece, the periphery of which is provided with screw thread, the connecting piece is screwed on the grinding body; and the rotatable millstone is connected with the rotating shaft by a rotatable millstone frame. The bean cabin, the static millstone frame and the static millstone can be dismounted from the grinding body by the grinding mechanism of the invention, thus leading the cleaning of remaining coffee powder in the grinding mechanism to be extremely convenient. When in use, the bean warehouse, the static millstone frame and the static millstone are screwed into the grinding body, and then the bean grinding operation can be carried out.

The invention relates to a process for preparing low-basis-weight corrugated paper. The process comprises the following steps of: a, adding American waste paper and European waste paper which serve as waste paper into a pulper according to a proportion of (1: 2)-(1: 4), and pulping into paper pulp; b, removing foreign substances from the paper pulp through a pressure sieve and a slag remover; c, inputting the paper pulp into a millstone and pulping so as to make pulp; d, adding an auxiliary material which comprises a reinforcer, a sizing agent and aluminum sulfate; e, pumping the pulp to a net part, forming and dehydrating the pulp until the dryness of the pulp is 15 to 25 percent; f, conveying the formed pulp to a squeezing part which is used for squeezing and dehydrating the pulp until the dryness of the pulp is 40 to 50 percent; and g, conveying the pulp to a drying part which is used for drying the pulp until the dryness of the pulp is 90 to 95 percent so as to prepare the finished corrugated paper. In the process, the proportion of the waste paper is optimized, the foreign substances in the pulped waste paper are removed, the optimized auxiliary material is added into the pulped waste paper, and the processed waste paper is formed and dehydrated by using a net as well as dried by steam, so the low-basis-weight and high-intensity corrugated paper can be obtained.

Parallelly-connected grinding technology and equipment thereof belong to grinding technology and equipment thereof; the equipment comprises a vertical mill, a powder separator, a blower fan, and a ball mill; the powder separator is connected with the upper part of the vertical mill; fine powder collectors are disposed at the periphery of the powder separator; a crude powder outlet of the powder separator is connected with the ball mil through a middle crude powder conveying device; an air outlet of the blower fan is connected with the bottom of the vertical mill; a backwind pipe is connected with the top of the powder separator. The invention adopts the grinding technology combining the vertical mill with the ball mill and the material bed-rolling grinding technology; powder grading is realized inside the equipment; qualified materials are collected in advance, which reduces material underlay and over-grinding phenomena of the ball mill; a traditional mode in which the millstone rotates and the grinding roller is driven for a vertical mill is changed into a mode in which the millstone is fixed and the grinding roller rolls; powder grading is realized inside the equipment; the working efficiency is high; the fine grinding performance is good; the abrasion is less; the energy consumption is low; the investment is saved; and the maintenance is safe and simple.

The invention relates to the technical field of jam preparation equipment, and specifically discloses a kiwi fruit pulping apparatus. The kiwi fruit pulping apparatus comprises a pulping barrel; a stirring shaft is arranged at a bottom of the pulping barrel; a bottom of the stirring shaft is connected with a transmission mechanism; a planetary gear set is connected between the stirring shaft and the pulping barrel; pulp beating rods are arranged on an inner wall of the pulping barrel; stirring blades are arranged on the stirring shaft, wherein one row of the stirring blades are permanent magnets; air bags are arranged on a side wall of the pulping barrel; pressure springs are arranged in the air bags, and are connected with push blocks, wherein the push blocks are permanent magnets and areopposite to close ends of the stirring blades with regard to magnetic poles; an one-way water inlet valve is formed on the pulping barrel, and is connected with a water supply device; one-way water outlet valves are arranged on the air bags; a first millstone is fixed on the pulping barrel; a second millstone is arranged under the first millstone; through holes are formed in the first millstone and the second millstone; and grinding teeth are arranged on an lower surface of the first millstone and an upper surface of the second millstone. Uniform kiwi pulp with relatively fine particle size can be prepared by adopting the technical scheme of the kiwi fruit pulping apparatus.

The invention discloses a ceramic reinforced steel-based wear-resisting composite and a preparation method thereof, and relates to the technical field of wear-resisting composites. The ceramic reinforced steel-based wear-resisting composite is prepared and obtained by pouring alloy steel molten metal to carry out casting infiltration on a ceramic prefabricated body through a casting infiltration method. The ceramic prefabricated body comprises, by weight percent, 40%-55% of spherical ceramic particles, 40%-55% of non-spherical polyhedral ceramic particles and 2%-5% of a binding agent, wherein0.5 mm<=the particle size of the spherical ceramic particles<the particle size of the non-spherical polyhedral ceramic particles<=1.5 mm. In the ceramic reinforced steel-based wear-resisting compositeand the preparation method thereof, the spherical ceramic particles cooperate with the non-spherical polyhedral ceramic particles, the particle sizes of the spherical ceramic particles and the non-spherical polyhedral ceramic particles are controlled, a unique toughening function is formed among the spherical ceramic particles, the non-spherical polyhedral ceramic particles and an alloy steel matrix, the prepared composite shows good impact resistance and wear resistance, and the functions of cutting and furrowing of grinding materials can be effectively resisted; and the preparation method is simple, and the prepared composite is suitable for being used for manufacturing hammer heads, liner plates, grinding rollers, millstones and other wear-resisting work components.

The invention relates to a nickel slag grinding system which is characterized by mainly comprising a feeding bin, a quantitative feeding machine, a column mill vibrating screen, a belt conveyor, a strong magnetic separator, a nickel slag vertical mill, a dry magnetic separator, a bag type dust collector, a main exhaust blower and a hot blast heater system. Nickel slag with the water content being not more than 5 percent and the granularity being less than 60mm is sent to the column mill to be ground by using the nickel slag grinding system, so that fine powder with the water content being above 90 percent and the granularity being below 5mm is obtained, the fine powder is subjected to iron separation through the strong magnetic separator after being screened, and is dried and ground in the nickel slag vertical mill after being subjected to iron removal. Meanwhile, after large particles containing iron are thrown out by a millstone, and are fed into the mill again after being subjected to iron removal through the dry magnetic separator. Finally, after multiple times of circulating grinding, a finished nickel slag micropowder product with a specific surface area of 4200-4500 cm<2> / g is obtained, and the finished product passing through the bag type dust collector is sent to a finished product library through an air conveying chute, and waste gas is discharged into atmosphere through a chimney. The nickel slag grinding system has the advantages of large yield, high grinding efficiency, low use cost and operation cost, remarkable electricity saving effect, and increasing of economic benefits.

The invention discloses a millstone crusher which comprises a lower bracket, a lower millstone crushing device, an upper millstone crushing device, an upper bracket and a driving device, wherein the lower millstone crushing device is arranged on the lower bracket, the upper millstone crushing device is arranged on the upper bracket and suspended above the lower millstone crushing device, and the driving device respectively drives the lower millstone crushing device and the upper millstone crushing device to rotate in opposite directions. By using the millstone crusher disclosed by the invention, materials required to be crushed enters a space between a crushing wall of an upper conical cover and a crushing wall of a lower conical cover from a material pipe, the rotation directions of the upper conical cover and the lower conical cover are opposite, the crushing wall of the upper conical cover and the crushing wall of the lower conical cover grind materials required to be crushed into particles with relatively smaller particle size and diameter, so that the yield is not required to be reduced or no fine crusher is required to be arranged, and the crushing process is simple; and according to the invention, the millstone crusher is adopted for crushing materials, the grinding strength is large, and the power of a motor is 82 KW in total, so that compared with at least 120 KW as the power of a motor of an existing hammer crusher, the power consumption is greatly reduced, and a lot of electric energy is saved, therefore, the millstone crusher is low-carbon and environment-friendly.