Method for producing vanadium pentoxide and by-product manganese sulfate from by using coal vanadium ore and pyrolusite together

Abstract

The invention belongs to the technical field of wet metallurgy of vanadium and provides a method for producing vanadium pentoxide and by-product manganese sulfate by using stone coal vanadium ore and pyrolusite together. The method orderly comprises the steps of: crushing, ball-milling and sieving, material proportioning, acid leaching, oxidizing, ion exchange adsorption, ion exchange desorption, molybdenum precipitation, burning, tail water purification and edulcoration by ion exchange, evaporation and concentration, and the like; the stone coal vanadium ore is directly leached without being roasted; the roasting process of the stone coal is omitted; the energy consumption is reduced; the pollution of the burnt gas to the environment is avoided; the purity of the vanadium pentoxide product is greater than 98%; the leaching rate of vanadium is greater than 95%; and the total recovery rate of vanadium is greater than 85%. Compared with the conventional vanadium extraction technology, the leaching rate and the total recovery rate of the vanadium are improved by 20-30%; meanwhile, a manganese sulfate product can be produced as a byproduct; the purity of the manganese sulfate product is greater than 98%; the leaching rate of manganese is greater than 96%; the total recovery rate of manganese is greater than 88%; the metal recovery rate is effectively improved; the production cost is reduced; the environment is protected; and the method has strong popularization and application value.

Description

Technical field [0001] The invention belongs to the technical field of vanadium hydrometallurgy, and particularly relates to a method for jointly preparing vanadium pentoxide by-product manganese sulfate from stone coal vanadium ore and pyrolusite. Background technique [0002] The reserves of vanadium-bearing stone coal in my country are huge, covering more than 20 provinces and regions across the country. The total proven stone coal reserves are about 100 billion tons, which is 6-7 times the total vanadium reserves in vanadium-titanium magnetite, and exceeds the vanadium reserves of other countries In sum, the development and utilization of such rich and precious stone coal and vanadium ore resources has huge economic potential and social benefits. [0003] Vanadium in stone coal mines mainly replaces six coordinated trivalent aluminum in the form of V(III) isomorphism, and exists in the mica crystal lattice. The molecular formula is (Al, V) [SiO 10 ](OH) 2 In order for vanadium t...

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Problems solved by technology

[0006] The method for producing vanadium pentoxide by-product manganese sulfate by combining stone coal vanadium ore and pyrolusite provided by the present invention aims to solve the problem of large pollution of vanadium extraction from stone coal, low vanadium leaching rate, serious environmental pollution and high energy consumption , low metal recovery rate and high production cost

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