METHOD AND DEVICE FOR ACCURATELY CONTROLLING REDUCTION VALENCE STATE OF HIGH-PURITY VANADIUM PENTOXIDE
The present application relates to the technical field of non-ferrous metal reduction, and specifically to a method and device for accurately controlling a reduction valence state of high-purity vanadium pentoxide. An example method includes: introducing a reducing gas into the vanadium pentoxide to carry out a reduction reaction under a heating condition to obtain a mixture; weighing the mixture during the reduction reaction, and stopping the reaction when the weight of the mixture reaches a specified value; and introducing a cooling gas into the mixture for cooling to obtain calcine. An example device includes: a conveying member; a casing arranged on the conveying member; a partition member on the casing and dividing the inside of the casing into a reduction zone and a protection cooling zone; a material storage member on the conveying member for placing materials; and a weighing member on the conveying member.
1 . A method for controlling a reduction valence state of high-purity vanadium pentoxide, the method comprising:
introducing a reducing gas into the vanadium pentoxide to carry out a reduction reaction under a heating condition to obtain a mixture;
weighing the mixture during the reduction reaction, and stopping the reaction when the weight of the mixture reaches a specified value; and
introducing a cooling gas into the mixture for cooling the mixture to obtain calcine.
2 . The method according to claim 1 , wherein the reducing gas comprises one of hydrogen, carbon monoxide or sulfur dioxide.
3 . The method for accurately controlling the reduction valence state of the high-purity vanadium pentoxide according to claim 1 , wherein a rate at which the reducing gas is introduced is 1 to 500 ml/min.
4 . The method according to claim 1 , wherein the introducing the reducing gas comprises heating using a silicon carbon rod at a temperature from 300° C. to 1200° C.
5 . The method according to claim 1 , wherein the cooling gas comprises nitrogen or an inert gas.
6 . A device comprising:
a conveyor and a casing on the conveyor;
a partition, provided on the casing, configured to divide an inside of the casing into a reduction zone and a protection cooling zone;
a material storage configured to store materials on the conveyor; and
a weighing member provided on the conveying member.
7 . The device according to claim 6 , wherein the conveying member comprises a chain conveyor,
wherein the casing is on a frame of the chain conveyor,
wherein the partition member comprises a partition plate, arranged on an inner top wall of the casing, and configured to divide the inside of the casing into the reduction zone and the protection cooling zone,
wherein the material storage member comprises a material tray on the chain conveyor and between two adjacent power rollers on the chain conveyor, and
wherein both ends of the material tray extend out along a width direction of the chain conveyor.
8 . The device according to claim 7 , wherein the weighing member comprises a load cell on the frame of the chain conveyor,
wherein a weighing end of the load cell is connected with a connecting plate,
wherein the connecting plate is connected with two electric cylinders,
wherein telescopic rods of the two electric cylinders are each connected with a vertical plate, and
wherein the two vertical plates are used to lift the material tray.
9 . The device according to claim 7 , wherein the material tray comprises zirconia or alumina.
10 . The device according to claim 6 , wherein a gas pressure in the protection cooling zone is greater than a gas pressure in the reduction zone.