Metallurgical method for extracting vanadium pentexide from low-grade stone coal vanadium ores

Abstract

The invention provides a metallurgical method for extracting vanadium pentexide from low-grade stone coal vanadium ores. The method comprises the following steps of: breaking and grinding the stone coal vanadium ores, grading the stone coal vanadium ore particles to a coarse particle grade and a fine particle grade, grinding and grading the coarse particles to the coarse particle grade, adding kerosene and terpenic oil(C10H17OH) into the obtained products at the coarse particle grade for flotation decarburization to obtain the charcoal concentrate, and adding a gangue inhibitor and a vanadium mineral collector into the obtained products at the coarse particle grade to obtain the vanadium concentrate; using the products at the fine particle grade obtained in two gradations, the flotation charcoal concentrate and the vanadium concentrate as the mixed concentrate, and the floated underflow as tailings; adding CaO into the mixed concentrate, performing granulation, baking and wet-grinding of the mixture, adding sulfuric acid into the mixture for leaching, performing purification, resin adsorption and analysis of the leaching solution, performing vanadium deposition and calcining of the product of the vanadium deposition to obtain V2O5, and washing the leaching mud which can be used as a building additive. In the method, the ore dressing of vanadium-enriched minerals and the pollution-free smelting process are combined, so that the smelting processing capacity is lowered, the smelting investment and the production cost are lowered, the V2O5 yield of the metallurgical method reaches 74.23 percent; and the production cost is reasonable, and the metallurgical method is environmentally-friendly.

Description

technical field [0001] The invention is a dressing and smelting process for extracting vanadium pentoxide from low-grade stone coal vanadium ore, and relates to a grinding and grading process, a flotation process and a smelting process. Background technique [0002] Stone coal vanadium ore is a low-grade oxidized vanadium ore, mainly composed of clayey rock and black carbonaceous shale. The main minerals of clayey rock are quartz, opal, illite (water muscovite), sepiolite, Kaolinite, chlorite, etc.; black carbonaceous minerals are mainly composed of quartz, opal and carbonaceous substances, containing a small amount of sulfide, carbonate minerals, limonite, feldspar, clay minerals, etc. [0003] The deep part of the Tangtuo mining area of ​​Sinosteel Hunan Phoenix Mining Co., Ltd. belongs to low-grade stone coal vanadium ore. The original ore is about 0.74% of vanadium pentoxide. The element available for recovery in the ore is vanadium. The main mineral composition is quart...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a method for extracting vanadium pentoxide from low-grade stone coal vanadium ore in order to overcome defects such as high production cost and serious environmental pollution in the prior art. technology, effectively improve the gra

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