Method for extracting vanadium from stone coal by utilizing fluidized bed

Abstract

The invention discloses a method for extracting vanadium from stone coal by utilizing a fluidized bed. The method comprises the following steps: drying vanadium ore, crushing, mixing with a calcium powder additive, combusting, carrying out stirring leaching, carrying out purification press filtration, carrying out resin exchange, and precipitating vanadium by using an ammonium salt. The method simplifies the technology for extracting vanadium from stone coal, has low requirements on the technologic level of workers, has a high production efficiency, improves the production environment, is convenient for realizing large scale production, realizes the program control of the production process, changes the defects of unstable conversion rate and the like caused by past dependence on the manual operation, allows the vanadium extraction conversion rate to reach above 70%, and reduces the production cost.

Description

technical field [0001] The invention relates to a method for extracting vanadium pentoxide from stone coal. Background technique [0002] The roasting used for extracting vanadium from stone coal is mainly open hearth furnace, converter and shaft furnace. In open hearth furnace roasting, the ore powder needs to be formed into balls, and the labor intensity of the roasting workers is high. The roasting temperature is controlled by the experience of the workers, and the error is large. In addition, during the furnace heating process, the furnace door has serious unorganized emissions, the production environment is poor, and the furnace is unloaded manually. Dust is flying, and entering the immersion pool is also manual operation; the whole process of vanadium extraction is labor-intensive, the conversion rate of vanadium is unstable, and large-scale production cannot be realized. The converter overcomes the shortcomings of relying on manual operation, experience and unstable ...

AI Technical Summary

Problems solved by technology

In open hearth furnace roasting, the ore powder needs to be formed into balls, and the labor intensity of the roasting workers is high. The roasting temperature is controlled by the experience of the workers, and the error is large. In addition, during the furnace heating process, the furnace door has serious unorganized emissions, the production environment is poor, and the furnace is unloaded manually. Dust is flying, and manual operation is required to enter the immersion tank; the entire vanadium extraction process is labor-intensive, the conversion rate of vanadium is unstable, and large-scale production cannot be realized

The converter overcomes the shortcomings of relying on manual operation, experience and unstable temperature control, but the converter cannot produce stone coal with high carbon content, otherwise the stone coal will easily coke and agglomerate in the furnace during the roasting process, resulting in abnormal operation of the converter production, resulting in unstable vanadium conversion

Roasting in shaft furnaces requires pelletizing, manual addition of ore, manual firing, high labor intensity, and serious unorganized emissions. It cannot burn stone coal with high carbon content, and at the same time, high-quality coal must be added to provide heat, resulting in high production costs.