Method for extracting vanadium from burning slag of stone coal vanadium mine fluidized bed

Abstract

The invention relates to a method for extracting vanadium from burning slag of a stone coal vanadium mine fluidized bed. The method comprises the following process flows of: grinding the burning slag of the stone coal vanadium mine fluidized bed together with ammonium sulfate, and roasting an obtained ground material at a low temperature; leaching an obtained roasting product by adopting dilute sulphuric acid, and sequentially preparing V2O5 and aluminum compounds from an obtained leaching solution by adopting a conventional method; preparing ammonium sulfate from the solution after aluminum extraction; and returning the obtained aluminum extraction to the grinding procedure for recycling. The invention provides the method for extracting the vanadium by roasting the burning slag of the stone coal vanadium mine fluidized bed at the low temperature and then leaching by using the dilute sulphuric acid, wherein the roasting temperature of the method is only 300-500 DEG C, and compared with the traditional sodication, calcification and low sodium roasting, the roasting temperature of the method is reduced by a half, so the energy consumption is obviously reduced, and the method is easy to implement in industrial production and solves the problem that proper roasting equipment is short of large production lines for extracting the vanadium from stone coal. Due to the method, the vanadium and the aluminum are more easily extracted from the leaching solution by using the traditional technology, and the leaching rates of vanadium and aluminum are respectively more than 88% and 91% which are both higher than those in the traditional method; and the ammonium sulfate is recovered from waste water where the vanadium and the aluminum are extracted and then returned to be used as an ingredient, so the method has the advantages of less consumption auxiliary materials, low processing cost and environmental protection.

Description

Technical field:

[0001] The invention relates to a method for extracting vanadium from the burning ash slag of a fluidized bed of stone coal vanadium ore by adopting an ammonium sulfate roasting method, and belongs to the field of chemical metallurgy. Background technique:

[0002] Vanadium is an important strategic material. It has many excellent physical and chemical properties and mechanical properties such as high melting point and easy deformation processing. Therefore, it is widely used in modern industrial technology such as iron and steel, defense cutting-edge technology, chemical industry and light textile industry.

[0003] my country's vanadium resources are mainly contained in stone coal. Extracting vanadium from stone coal is an important development direction for the utilization of vanadium resources in my country. Stone coal is also a low calorific value fuel with a calorific value of about 4000kJ / kg~6000kJ / kg. Recently, the process of comprehensive utilization of s...

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