Method for shortening ferrovanadium smelting time

[0045] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The vanadium-containing dust sludge is dust removal ash obtained from vanadium iron, and the specific surface area is 500-3000cm 2 / g, the composition is V element content 5%, and the rest components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust: lime = 2:22:5, the cylindrical wet aggregate is obtained by extrusion molding, and the powder with a particle size below 0.5cm is found after screening. The proportion of the material under the sieve is only 2.5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 5.5% of the total material. The drying temperature is 100-300°C, the drying time is 2 hours, the weight loss of the pellets is 5% due to dehydration, the re...

[0048] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The surface area is 500~3000cm 2 / g, the composition is V element content 50%, and the remaining components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust sludge: lime = 104:56:15, spherical wet aggregates are obtained by rolling molding, and powdery sieves with a particle size below 0.5cm are found through sieving. The proportion of the lower material is only 5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 10% of the total material. The drying temperature is 100-300°C, the drying time is 5 hours, the pellets lose 10% of their weight due to dehydration, the residual moisture in the dried pellets is less than 0.05%, and the pellet density is about 3.4g / c...

[0051] Mix vanadium-containing powder (powdered vanadium trioxide, vanadium-containing dust sludge, etc.) and lime according to a certain ratio to prepare a mixture. The mixture of dust removal ash obtained from iron, the specific surface area is 500-3000cm 2 / g, the composition is V element content 27.5%, and the remaining components are CaO, Al 2 o 3 , MgO and other impurities. According to the mass ratio, according to the proportion of vanadium trioxide: vanadium-containing dust and mud: lime = 52:39:10, spherical wet aggregates are obtained by roll forming, and powdery sieves with a particle size below 0.5cm are found through sieving. The proportion of the lower material is only 2.5%, and the mass percentage of the material that adheres to the equipment and fails to gather and form is 1% of the total material. The drying temperature is 100-300°C, the drying time is 5 hours, the pellets lose 10% of their weight due to dehydration, the residual moisture in the dried pelle...