Stone coal vanadium extraction production process

Abstract

The invention belongs to the field of the stone coal vanadium ore vanadium extraction and smelting technology and particularly relates to a stone coal vanadium extraction production process. The stonecoal vanadium extraction production process comprises the steps of 1, conducting carbon flotation on high-carbon stone coal; 2, conducting high-carbon concentrate fluidized-bed roasting; 3, conducting bacterial oxidation on fluidized-bed calcine, smoke dust, low-carbon stone coal and carbon flotation tailings; 4, diffusing and dialyzing an ionic membrane; 5, immersing vanadium in sulfuric acid; 6, conducting resin adsorption; 7, conducting loaded vanadate resin desorption; 8, precipitating vanadium through ammonium chloride; 9, conducting microwave irradiation on wastewater to remove ammonianitrogen; and 10, conducting calcination. The stone coal vanadium extraction production process is simplified, high in automation degree, high in production capacity and vanadium leaching efficiency and small in environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction and smelting of stone coal vanadium ore. It specifically relates to a production process for extracting vanadium from stone coal. Background technique [0002] Vanadium in stone coal is mainly V 3+ , V 4+ and V 5+ Valence exists, V 3+ Insoluble in neither water nor acids or bases, V 4+ Insoluble in water but soluble in acid, V 5+ Both water-soluble and acid-soluble. Direct acid leaching can only leach V 4+ and V 5+ Valence of vanadium. In the prior art, methods such as acid-mixing aging and roasting can be used to oxidize vanadium in a low-valence state to make it into V 4+ and V 5+ Vanadium in the valence state, but the degree of oxidation is relatively low, and the ratio of low-valence state to high-valence state vanadium is relatively small; the main reason is that the mineral composition of stone coal is generally quartz and vanadium mica, and the particles of useful min...

AI Technical Summary

Problems solved by technology

In the prior art, methods such as acid-mixing aging and roasting can be used to oxidize vanadium in a low-valence state to make it into V 4+ and V 5+ Vanadium in the valence state, but the degree of oxidation is relatively low, and the ratio of low-valence state to high-valence state vanadium is relatively small; the main reason is that the mineral composition of stone coal is generally quartz and vanadium mica, and the particles of useful minerals are small and embedded. It is complex, and most of it occurs in vanadium mica, and the particle size of many vanadium micas is fine and ultra-fine particles. It is difficult to dissociate and expose the monomer even if it is finely ground during the grinding process. It exists in the form of inclusions in particles or aggregates, and the particles of inclusions are extremely fine, only a few to tens of microns in size. It is extremely difficult to phase change during roasting, and it is difficult to dissociate or expose its monomers during grinding. The leaching and extraction of the