147results about How to "Reduce post processing" patented technology

The invention discloses a vacuum infusion forming method for a carbon fiber composite structure member. The method comprises the steps as follows: making a large-size carbon fiber composite wind power blade structure member by a vacuum infusion forming technology; bonding and fixing a guide net to a mould by a transparent double-sided tape for preventing deformation of carbon fiber fabrics due to deformation of the guide net to guarantee that carbon fiber sheet is consistent in orientation so as to obtain a composite structure member with higher mechanical performance; preheating a resin mixing solution with a carbon fiber preforming body at first to guarantee the resin mixing solution to be quickly infused in a low-viscosity state; and sealing the upper surface of the carbon fiber preforming body with a unidirectional breathable film to form a surface breathable channel, and enabling the resin mixing solution to permeate from surface and to fill fully under vacuum, thus completing the vacuum infusion forming process. The method is suitable for the carbon fiber fabrics which are shaped by hot melting lines and have different surface densities; and compared with the carbon fiber prepreg forming process, the method has the advantages of long material availability period, high process stability and low product cost, and is favorable for popularization and application.

The invention is concerned with a kind of high efficiency water treatment equipment and technology belonging to water treatment field. The middle parts of the equipment are two flocculating rooms having mesh setting with disturbing flow, and the bottom of the flocculating room is precipitation tank. The suspending layer of active mud residue is out of the flocculating room and there is slanting pipe on top of it and concentrate room under it. The pipe excluding residue sets in the suspending layer of active mud residue, and the bottom of clean tank is filler to exclude residue, and there is siphon pipe connecting with the filler. There are grooves excluding residue at top of the flocculating room connecting with the pipe excluding residue and the siphon pipe connects with the residue reuse tank. The filler to exclude residue connects with a pump of reused residue. The equipment gathers the small air flotation, flocculating, active mud residue layer flocculating, and reused technology. Compared with traditional mixed and coagulate deposition technology, it saves 40 percent of field, reduces 10 percent of drug and enhances 15 percent disposal efficiency.

The invention relates to a method for preparing a fiber reinforced multiphase ceramic matrix composite material. The method comprises the following steps: using a carbon fiber or silicon carbide fiberas a reinforcement, and combining a slurry method to prepare a fiber prepreg, and then preparing the fiber reinforced multiphase ceramic matrix composite material by hot press forming, carbonizationand infiltration. The powder body such as ZrB2, ZrC, HfB2, and HfC are directly added into a slurry, thereby introducing an ultra-high temperature component, and improving the ultra-high temperature resistance of the composite material. The method overcomes the defects of long preparation period and high cost of the traditional fiber reinforced ultra-high temperature ceramic matrix composite material, and can prepare the ultra-high temperature ceramic matrix composite material with excellent performances in a short cycle and low cost.

The invention provides a preparation method for a ceramic copper-clad substrate. The preparation method comprises the following steps: carrying out a pre-processing for copper foil, wherein one side of the copper foil is a bonding surface for bonding with a ceramic substrate, the other side is a non-bonding surface; forming an organic protection layer on the non-bonding surface of the copper foil; carrying out a electrochemical deposition process for the copper foil to form a cuprous oxide layer on the bonding surface of the copper foil in a Cu<2+> electrolyte solution; removing the organic protection layer on the non-bonding surface of the copper foil; superimposing the bonding surface with the cuprous oxide layer and the preprocessed ceramic substrate, followed by a bonding process. In addition, the invention further provides a ceramic copper-clad substrate. With the present invention, the uniform and dense cuprous oxide layer on the bonding surface of the copper foil is formed through the electrochemical deposition method, and the cuprous oxide layer does not contain copper oxide causing generation of tiny bubbles, such that the bonding surface of the copper foil and the ceramic can forms a good bonding during a bonding process so as to great improve bond strength of the copper foil and the ceramic substrate.

The invention provides a method for treating organic wastewater through synergistic activation of persulfate using electrochemistry and a Ni-Fe-LDH / rGO catalyst. The method comprises the specific steps: adding persulfate and the Ni-Fe-LDH / rGO catalyst in an electrolysis device containing organic wastewater, degrading the organic wastewater under the effect of external electric field, providing a constant current for the electrolysis process by using a constant potential rectifier, using 0.1M of Na2SO4 as a support electrolyte in the electrolysis process, and continuously performing magnetic stirring in the test process so as to guarantee the sufficient contact of the catalyst and solution. The method not only can activate the persulfate through the electrochemical manner, but also can enhance the capability of the original catalyst to activate the persulfate, and multiple paths are used for synergistically degrading the organic pollutants. The method is simple in operation, flexible in reaction, high in catalysis efficiency, and good in degradation effect; the catalyst has good magnetism and stability, and has wide application prospect in the environment pollution governance field.

The invention discloses a thermosetting plastic. The thermosetting plastic is characterized by comprising the following components in parts by weight: 60-95 parts of thermosetting resin, 5-40 parts of low-shrink additive, 150-300 parts of an inorganic mineral filler, 2-4 parts of an initiator, 0.6-1 part of calcium hydroxide micro powder, 2-6 parts of zinc stearate micro powder and 30-60 parts of glass fiber. In comparison with a conventional thermosetting plastic, the thermosetting plastic can be solidified more rapidly, high strength can be maintained within a wide temperature range, and the flame-retardant effect is good.

The invention provides a porous silver micro-nano structure and a shape and size controllable preparation method of the porous silver micro-nano structure, and belongs to the technical field of precious metal porous nano-crystalline structures. The overall appearance shape of the porous silver micro-nano structure is a hexagonal sandwich shape or a quadrilateral shape or a strip shape and is formed by stacking 30-50-nanometer silver basic composition units, and multiple pores are formed by stacking silver basic composition units. The preparation method includes the steps that sodium citrate, sodium carbonate and citric acid are dissolved in deionized water, a silver nitrate solution and a D-glucose solution are added in sequence, the mixture is stirred and sinks, and a precursor is obtained after centrifugal drying; the porous silver micro-nano structure is obtained after heat treatment is conducted on the precursor. The method is simple, environmentally friendly and controllable in shape and size; the prepared porous silver micro-nano structure is uniform in size distribution, large in specific surface area, good in permeability and higher in catalytic rate for p-nitrophenol, and has potential application in the precious metal catalytic aspect.

The invention provides a drag reducer and a preparation method thereof. The drag reducer is a suspension liquid containing poly(alpha-alkene), silicone oil, an isolating agent, and a surfactant. The preparation method comprises the following steps: (1) subjecting alpha-alkene to coordination polymerization in silicone oil; (2) mixing the system obtained in the step (1) with an isolating agent after the coordination polymerization, and then adding a surfactant so as to obtain the suspension liquid. The drag reducer has the advantages of good stability, low viscosity, good fluidity, and user-friendliness. The preparation method is simple and can be easily applied to the industry.

The invention discloses a high-intensity ardealite wall brick and the producing method. And the composition weight ratio of semi-hydrated ardealite to anhydrous ardealite to flyash to coagulant is (70-85) : (12-20 ): (15-20 ): (15-25), where the coagulant is 12-20% silicasol water solution. And the invention uniformly blends them in sprinkling mode, mechanically places the mixture into a mould and shapes in high pressure, mechanically demoulds, and naturally hydrates to make it. And the invention firstly uses large amount of ardealite raw material in building materials, where the synthetic utilization of ardealite is up to 80%; and it is low-cost and saves land resources. After processed, it accords with national stipulated nuclear radiation indexes, has high hardness, reduces equipment investment and reduces cost of product.

The invention discloses a double-phase rotating stream separation system. Operation and maintenance of the double-phase rotating stream separation system are convenient, and the separation efficiency is higher. The double-phase rotating stream separation system is composed of a motor, a booster pump, a long circulating pipeline, a short circulating pipeline, a rotating stream body and a one-way valve which are connected successively; the rotating stream body is composed of a rotating stream chamber cylinder, a separation cone segment cone body, an external bottom flow segment cylinder, and a bottom flow pipe with reduced diameter steps which are connected successively; the rotating steam body comprises tow overflow ports and two bottom flow ports. Compared with conventional rotating flow separation devices, the double-phase rotating stream separation system can be used for eliminating short-circuit flow, reducing circulation flow, and reducing bottom flow port light phase content greatly; flow field stability of the double-phase rotating stream separation system is increased; high efficiency separation treatment of mixed phases is promoted; the double-phase rotating stream separation system can be used for circulating treatment of the mixed phase containing light phase in short-circuit flow and the bottom flow ports, is small in occupied space, and is simple in operation and management.

The invention provides a ganoderma lucidum polysaccharide with a light color and high molecular weight, and a preparation method thereof. The ganoderma lucidum polysaccharide with a light color and high molecular weight is prepared by a method comprising the steps of extraction of crude polysaccharide of ganoderma lucidum, condensation of crude polysaccharide of ganoderma lucidum, ethanol precipitation and rinsing, and drying. The ganoderma lucidum polysaccharide prepared in the invention has a stable quality, contains high content active components and can substantially enhance phagocytosis and killing capability of macrophage, thereby improving antineoplastic capability of organism.

The invention discloses an antimicrobial low-warpage low-flash PPS composite material and a preparation method thereof. The material is prepared from, by weight, 31.5-48% of PPS resin, 6-12% of PPE resin, 40-45% of glass fibers, 8-12% of antimicrobial agent, 0.5-1% of nucleating agent, 0.4-0.5% of antioxidant and 0.5-0.6% of lubricating agent. An engineering plastic, namely PPS, serves as a main body, the PPE resin, the glass fibers, the antimicrobial agent, the nucleating agent the antioxidant and the lubricating agent are added, the raw materials are mixed together and melted through a double-screw extruder, and then the antimicrobial low-warpage low-flash PPS composite material which is capable of meeting the antimicrobial requirements of household appliances is prepared. The material has the advantages of being antimicrobial, low in warpage and low in flash on the basis of ensuring the original excellent mechanical performance, heat resistance, fire resistance and electrical performance of PPS.

The invention discloses high-precision high temperature and corrosion resisting nanometer filter cloth with adsorption and decomposition functions and a making method thereof. The filter cloth comprises a middle base cloth layer, wherein a superfine fiber dust-facing surface layer is arranged on the upper surface of the base cloth layer, an air transmitting and purifying surface layer is arranged on the lower surface of the base cloth layer, the superfine fiber dust-facing surface layer is formed by laying nanometer activated carbon fibers and polytetrafluoroethylene superfine fibers into a net, the base cloth layer, the superfine fiber dust-facing surface layer and the air transmitting and purifying surface layer are needled into felt, and a PTFE emulsion dipping layer is arranged on the surface of the felt. The filter cloth has the advantages that the nanometer activated carbon fibers and a polytetrafluoroethylene base material are used for making the filter cloth, and the filter cloth has a microcellular structure, can adsorb and decompose harmful gases and is high in filtering precision; meanwhile, according to the making method, by means of the dipping treatment process, the surface of the filter cloth has certain hydrophobicity, and the resistance to acid, alkali and corrosion of the filter cloth is improved.

The invention discloses a preparation method of lithium hexafluorophosphate. According to the preparation method, lithium fluoride reacts with phosphorus pentafluoride, and liquid carbon dioxide or supercritical carbon dioxide fluid is taken as the reaction solvent. The preparation method is green and environmentally friendly, the resources are saved, and the cost is low. The quality of obtained lithium hexafluorophosphate product is good. The product barely contains any impurity that damages lithium hexafluorophosphate taken as cell electrolyte. The purity is high, the production process is safe, and the preparation method is suitable for industrial production.

The invention belongs to the technical field of organic synthesis and provides a method for performing catalytic hydrogenation on p-chloronitrobenzene with a modified Raney nickel catalyst and preparing p-chloroaniline. The method comprises the following steps: adding p-chloronitrobenzene, the modified Raney nickel catalyst with an additional metal material and a solvent in a high-pressure reaction kettle, wherein the weight ratio of p-chloronitrobenzene to the solvent is 1:2-1:5 and the weight ratio of p-chloronitrobenzene to the catalyst is 1:(0.02-0.06); performing nitrogen replacement, then performing hydrogen replacement, wherein the pressure of hydrogen is 1.0-3.5MPa and the reaction temperature is 60-100 DEG C; and stirring to react for 1-4 hours to obtain the product p-chloroaniline. The method has simple technology, low demand on equipment and low environmental pollution and is easy to realize industrialization; and the reaction conversion rate is 99.9%, the selectivity is not less than 98% and the yield is not less than 95%.

The invention relates to a light and efficient diamond grinding wheel, and belongs to the technical field of diamond cutting tools. The light and efficient diamond grinding wheel comprises an aluminum substrate and diamond tool bits. Outwards-extending protruding parts are arranged on the bottom edges of the diamond tool bits. The aluminum substrate comprises a grinding installation face. The diamond tool bits are arranged on the grinding installation face. The extending protruding parts are embedded in the grinding installation face. The light and efficient diamond grinding wheel is formed by high-strength alloy aluminum at a time, the bottoms of the diamond tool bits are embedded in the alloy aluminum, it is ensured that the tool bits do not fall in the use process, and therefore many subsequent procedures are reduced, silver solder is saved, the manufacturing cost is effectively reduced, the service life of the diamond grinding wheel is ensured as well, and the light and efficient diamond grinding wheel is particularly suitable for stone processing and concrete road face grinding.

The invention provides a clothes dryer which comprises a housing assembly, a liner assembly, a telescopic frame assembly, a heating assembly and an air exhaust assembly. The liner assembly is arranged in the housing assembly and consists of an inner liner, wherein the inner liner is a hollow cavity, and an opening is formed in one side of the hollow cavity. The telescopic frame assembly is arranged in the hollow cavity and used for placing clothes to be dried and can be pushed in or drawn out from the inner liner. The heating assembly is arranged in the housing assembly and located at the outside of the liner assembly. The heating assembly is connected with the inner liner and used for drying the clothes to be dried in the telescopic frame assembly. The air exhaust assembly is arranged in the housing assembly and located at the outside of the liner assembly. The air exhaust assembly is communicated with the inner liner and used for promoting the gas flow in the telescopic frame assembly. The clothes dryer has the advantages that the clothes can be dried quickly, and the clothes after being dried are straight and not wrinkled; the post-processing procedure for drying and picking up the clothes can be omitted, and the user experience can be enhanced.

The invention discloses a forming process and a special processing device for an ultrathin protective cover sleeve. The forming process comprises the following steps: 1, preparing a cover sleeve material and a die; 2, preparing a vacuum adsorption jig and installing the vacuum adsorption jig in an adsorption device on a working table; 3, starting the vacuum adsorption device and an engraving and milling electric spindle on the working table to prepare a semifinished sheet metal of the ultrathin protective cover sleeve; 4, carrying out surface processing process on the semifinished sheet metal of the ultrathin protective cover sleeve; and 5, using the die for carrying out pressing forming on the semifinished sheet metal of the ultrathin protective cover sleeve by a hot press so as to obtain the ultrathin protective cover sleeve. The working table of the special processing device is provided with the vacuum adsorption device and the engraving and milling electric spindle. The process disclosed by the invention enables forming efficiency of the ultrathin protective cover sleeve to be high and can be used for single plastic or various composite materials to carry out forming processing of the ultrathin protective cover sleeve; the die and equipment are not required to replace; and the special processing device has high processing accuracy and yield, adopts the simple and convenient process, and is beneficial for implementing high-efficiency automatic production and also for saving labor cost.

The invention discloses a device and a method for removing methanol from a methyl tert-butyl ether cracking product. The MTBE cracking product and absorption liquid undergo cross flow-counterflow contact in a multistage airflow shear cross-flow bed; under the shear action of high-speed rotating filler, cracked gas and the absorption liquid are dispersed, coalesced and redispersed for multiple times, so that multistage absorption is realized; cracking gas is introduced to a gas inlet in the side bottom of a multistage airflow shear cross flow bed; a gas outlet in the top of the multistage airflow shear cross flow bed is connected with a purified gas section; the absorption liquid is introduced to a liquid inlet in the side top of the multistage airflow shear cross flow bed; a liquid outletin the bottom of the multistage airflow shear cross flow bed is used for draining the absorption liquid; the liquid inlet is connected with a pump; the liquid outlet of the multistage airflow shear cross flow bed is connected with a liquid-rich tank; the multistage airflow shear cross flow bed comprises a liquid distributor, a liquid collecting and redistributing device, a rotor, a stator, a driving device and a casing. According to the equipment, the gas and the absorption liquid generally make counterflow contact, so that a gas-liquid mass transfer propulsion force is greater, the purification degree of the cracking gas is improved, and the concentration of methanol in the rich solution and the utilization rate of the absorption liquid are improved.

The invention relates to a hollow copper telluride nanometer crystal and a preparation method and application thereof, belonging to the technical field of semiconductor nanometer crystals and synthesis methods. The preparation method comprises the steps of: firstly placing copper acetylacetonate, dodecylamine and trioctylphosphine in a container for magnetic stirring, and gradually increasing the temperature under the protection of nitrogen till the color of solution is turned to orange from blackish green and finally brownish red turbid solution is formed and indicates that copper nanometer crystals are formed; and injecting tellurium-trioctylphosphine solution prepared in advance into the brownish red turbid solution till the mixed solution becomes black and turbid to form the hollow copper telluride nanometer crystals. By changing the molar ratio or the reaction temperature of the copper acetylacetonate and tellurium, the control over the size of the hollow copper telluride nanometer crystals can be realized and the post-treatment process of a template method can be reduced; and since the prepared samples have small size and large specific surface area, high carbon monoxide gas sensitivity is presented and the hollow copper telluride nanometer crystal has an potential of application to gas-sensitive sensors.

The invention relates to biodiesel as a novel power source used by a gas engine using diesel oil as power and a preparation technology thereof. The preparation technology comprises the following steps: using oil plant fruits containing reproducible oil plants, animal oil and fat, oil palm, Chinese pistachio, and the like, oil water plants , such as engineered microalgae, and the like, 50-90 percent of waste cooking oil and 10-40 percent of methanol as raw materials; using 5-30 percent of solid organic acid as catalyst, assisting dissolving by 1-30 percent of surface active agent (ratio:), and continuously mixing the mixture for 20-120 min under the normal atmosphere condition with the temperature between 20 DEG C and 100 DEG C for reacting so as to prepare the biodiesel. The invention has the advantages of gentle reaction condition, short reaction time and high esterification and ester transformation ratio; the product can replace excellent mine diesel by 100 percent and can be mixed with the mine diesel according to any proportion for use.

The invention provides a borate silicate aluminate glass bead. The borate silicate aluminate glass bead comprises, by mass, 50 to 58% of silica, 3 to 8% of boron oxide, 5 to 10% of alumina, 12 to 18% of sodium oxide, 8 to 15% of calcium oxide, 0 to 1.5% of magnesium oxide. The invention also provides a preparation method of the borate silicate aluminate glass bead. The preparation method comprises a step of raw material preparation, wherein a raw material comprises, by weight, 2.6 to 2.7 parts of carbon black, 0.7 to 0.9 part of boric acid, 2 to 2.3 parts of a calcium salt, 1.6 to 1.8 parts of sodium nitrate, 2.5 to 2.8 parts of aluminium nitrate, 0.2 to 0.4 part of magnesium nitrate, and 0 to 0.1 part of alumina silicate. The preparation method possesses following advantages: the finished product yield is high, water flotation is not needed, flotation ratio is 99% or higher, the compressive strength is high, quality is stable, and the density and the compressive strength are high in uniformity.

The invention discloses a smooth blasting method for controlling flatness of profile surface for an underground chamber. The method comprises the following steps: 1) organizing topic task force to investigate on site according to the over-under-excavation phenomenon in a practical construction effect, and collecting site pictures; 2) carrying out mathematical analysis and evaluation to ensure that a smooth blasting effect is achieved; 3) analyzing key parameters determining smooth blasting, wherein the key parameters comprise hole spacing of peripheral holes, minimum resistant line, close coefficients of the peripheral holes, charge quantity and charging structure of the peripheral holes, blasting interval and the like; 4) calculating the hole spacing of the peripheral holes of the underground chamber according to fluid-dynamic theory; 5) making specific countermeasures and implementation plans under the combination of field investigation, test data and theoretical analysis results; and 6) checking the smooth blasting effect. The method has the characteristics of saving construction cost, improving construction quality and improving economic benefit, and is applicable to smooth blasting of the underground chamber in the fields of water conservancy and hydropower engineering , tunnel engineering, underground space structure and the like.

The invention discloses a preparation method of submicron hexanitrohexaazaisowurtzitane in batch. The method comprises: adding a surfactant into water to prepare a surfactant solution, grading by using grinding ball mediums with different diameters, adding CL-20, the surfactant solution and the grinding ball mediums into grinding tanks, cooling, symmetrically putting the grinding tanks, fixing the grinding tanks onto a planet grinder for planet grinding, separating a grinded explosive suspension and the grinding ball mediums, performing solid-liquid separation for the explosive suspension, and drying to obtain the submicron CL-20. According to the preparation method provided by the invention, the CL-20 explosive, the surfactant solvent and the grinding ball mediums with different diameters are graded, and the planet grinder is used for repeated grinding. The prepared epsilon-CL-20 is uniform in powder particle size, smooth in particle surface, and regulatable in average particle size; during a preparation process, no organic solvent impurities are introduced, a post treatment is reduced , a total grinding time is 1-10 hours, and a grinding time is short. The method is suitable for production in batch.

The invention relates to a supersonic wave technology-based hollow fiber film preparation method. The preparation method comprises the following steps of S1, dissolving a polymer resin, a hydrophilc agent, a thickener, an additive and a nonsolvent in a solvent to obtain a spinning stoste, S2, carrying out deaeration treatment on the spinning stoste to obtain a spinning material liquid, S3, pressing the spinning material liquid into a spinning jet, carrying out spraying, carrying out 20-200mm air bath treatment, and stepwise feeding the sprayed materials into all levels of ultrasonic coagulation bathes for curing molding of a primary hollow fiber film, S4, treating the primary hollow fiber film by a washing tank, carrying out glycerin hole-retaining treatment, and winding the primary hollow fiber film on a wire winding wheel, and S5, cutting off the primary hollow fiber film on the wire winding wheel, tidily binding the primary hollow fiber film, putting it into a drying room and carrying out drying. The invention provides the supersonic wave technology-based hollow fiber film preparation method. The supersonic wave technology-based hollow fiber film preparation method improves hollow fiber film pore-forming efficiency, shortens spinning time and improves generation efficiency.

The invention relates to the field of processing of foods and beverages, in particular to a low-tannin fermented rosa roxbunghii beverage and a preparation method thereof. The low-tannin fermented rosa roxbunghii beverage provided by the invention comprises the following component in percentage of rosa roxbunghii original juice of which the addition amount is 30-50%, cane sugar of which the addition amount is 5-10%, protein powder of which the addition amount is 0.05-0.3%, kefir microbial populations of which the inoculum concentration is 0.005-0.02%, calcium carbonate of which the addition amount is 6% and the balance of water. The low-tannin fermented rosa roxbunghii beverage disclosed by the invention has the characteristics of being mellow and brisk in mouth feel, moderate in sour andsweet degree and good in organoleptic quality; by the method, the tannin content in rosa roxbunghii is effectively reduced, and the problems that tannin is difficult to remove and influences the mouthfeel of made products during beverage processing are effectively solved; and besides, the tannin is utilized as a microbial carbon source, along with prolonging of fermentation, the tannin content iscontinuously reduced, and the tannin content is reduced by 3-10% compared with that of an ordinary strain fermented rosa roxbunghii beverage.

The invention discloses a synchronous shrinkage liner tube for sintering a tubular ITO target blank and a preparation method thereof. A raw material for preparing the synchronous shrinkage liner tubeis tetragonal polycrystalline zirconium oxide powder with the specific surface area of 15-25 m<2>.G<-1> or barium strontium titanate powder with the specific surface area of 18-30 m<2>.G<-1>. The preparation method comprises the following steps: adding deionized water accounting for 50% of the target solid phase content of the slurry into the raw materials to obtain a mixed solution, adding a dispersing agent, regulating the pH value of the mixed solution to 9-10, adding an adhesive accounting for 1.0-1.5% of the mass of the raw materials, uniformly mixing, carrying out ball milling in a ballmill to obtain slurry, pumping the slurry into a prilling tower for prilling to obtain prilling powder, putting the prilling powder into a mold, and carrying out compression molding to obtain the synchronous shrinkage liner tube. The synchronous shrinkage liner tube plays a role in replacing spherical ceramic paving materials, and due to the fact that the shrinkage rate of the synchronous shrinkage liner tube is slightly larger than that of a tubular ITO target material blank, the effect of better reducing sintering shrinkage resistance is achieved, and preparation procedures before sinteringare reduced, so that the production operation is more convenient.

The invention discloses a marble cutting device. The marble cutting device comprises a bottom case, longitudinal slide rails are arranged on two sides of the outer wall of the top of the bottom case,the outer walls of the tops of the longitudinal slide rails are slidably connected to vertical racks, vertical slide rails are arranged on the outer walls of opposite sides of the vertical racks, theouter walls of the side faces of the two vertical slide rails are slidably connected to vertical slide blocks, a same cross beam is arranged on the outer walls of opposite sides of the vertical slideblocks, a transverse guide rail shell is arranged on the outer wall of the top of the cross beam, the outer wall of the side face of the transverse guide rail shell is slidably connected to two transverse slide blocks, cutting mechanisms are arranged on the outer walls of the bottoms of the transverse slide blocks, a loading mechanism is arranged on the outer wall of the top of the bottom case, and the inner sides of opposite sides of the transverse guide rail shell are connected to a same bidirectional lead screw. The marble cutting device can cut two sides of a marble board at the same time,so that the cutting efficiency is improved. The marble cutting device can polish the cut edge, so that the later steps are cancelled and the manpower is saved.

The invention discloses a method of synthesizing a 5,5'-bistetrazole-1,1'-dioxodihydroxy ammonium salt. The method comprises the following step: synthesizing the 5,5'-bistetrazole-1,1'-dioxodihydroxy ammonium salt by taking dichloroglyoxime, sodium azide, sodium hydroxide and hydroxylamine hydrochloride as raw materials and adopting alcohol solvents by virtue of azidation reaction, acid catalysis cyclization reaction and salt forming reaction. Compared with the prior art, the two-step reaction adopted by the method disclosed by the invention only adopts one solvent, so that not only can type of solvents be reduced, but also the after-treatment process of the azidation reaction can be cancelled. Meanwhile, the types of catalytic acids are expanded, the difficulty of the production process is lowered, the total yield of the reaction is increased, and thus, the method is an efficient and low-cost synthetic method.