Two-stage curing vanadium extraction method of stone coal vanadium ores

Abstract

The invention provides a two-stage curing vanadium extraction method of stone coal vanadium ores. The two-stage curing vanadium extraction method comprises the following steps: (1) firstly, breaking and grinding the stone coal vanadium ores, and then adding water and concentrated sulfuric acid to the obtained ore powder and mixing evenly to obtain a mixture, wherein the mass of the concentrated sulfuric acid added accounts for 10%-15% of the mass of the stone coal vanadium ores; (2) curing the mixture, next, leaching the obtained mixture by use of water, and performing liquid-solid separation to obtain a vanadium-containing leaching solution and leaching slag; (3) adding concentrated sulfuric acid to the leaching slag and mixing evenly, next, curing, leaching the obtained mixture by use of water, and performing liquid-solid separation to obtain a vanadium-containing leaching solution and leaching slag, wherein the mass of the concentrated sulfuric acid added accounts for 10%-15% of the mass of the stone coal vanadium ores; and (4) blending the vanadium-containing leaching solution of the step (2) and the vanadium-containing leaching solution of the step (3). The two-stage curing vanadium extraction method of the stone coal vanadium ores has the advantages that side reactions in curing are effectively inhibited and the vanadium leaching rate is greatly increased. A two-stage low-acid curing method is adopted, the acid concentration is relatively low, and the curing process is clean and environment-friendly; and as a result, the two-stage low-acid curing method has a great industrial application prospect.

Description

Technical field [0001] The present invention belongs to the field of ore -dipping technology, especially involving a kind of wet extraction from stone coal minerals to extract V 2 O 5 Methods. Background technique [0002] 战 is a very important strategic resource and is extremely widely used. In 2012, the development plan for energy storage technology formulated by the United States in 2012 was listed on the entire 钒 liquid flow battery, so the demand for 钒 is also increasing.At present, the main raw materials of the ravioli are vanadium titanium magnet ore, cymbal clay mines and stone coal mines. It is a unique type of mines in my country. Its reserves are huge. V 2 O 5 The reserves reached 117970 KT, which is 6.7 times the reserves of the reserves of the vanadium titanium magnetite ore, which is equivalent to other countries in the world 2 O 5 Summary of reserves. [0003] Concentrated acidity and immersion method is a kind of enhanced acid immersion technology that reduces ene...

AI Technical Summary

Problems solved by technology

The Chinese patent publication number is CN101921912A, the publication date is December 22, 2010, and the patent document titled "concentrated acid two-stage slaking-gas-liquid circulation stone coal vanadium extraction process" proposes that stone coal vanadium ore enhances acid diffusion The two-stage aging leaching method, but it will release a lot of heat when mixing acid, the acid diffusion process has been completed enough, its strengthening effect is not obvious, and the additives added in the example may also play a role in strengthening the aging process, but this method is for Calcium salt packages formed during ripening have no re-opening effect

The Chinese Patent Publication No. is CN102191388A, the publication date is September 21, 2011, and the patent document titled "Concentrated Acid Two-Stage Slaking Fossil Coal Vanadium Extraction Process" proposes a two-stage slaking enhanced leaching method, which requires liquid-solid If the ratio is at least 0.5, the curing operation is difficult to carry out, and two kinds of additives need to be added, which increases the burden of three wastes treatment

The Chinese Patent Publication No. is CN103290215 A, the publication date is September 11, 2013, and the patent document titled "Method for Enhancing Concentrated Acid Slaking and Leaching of Stone Coal Vanadium Ore" has complicated control of the curing process, which increases the difficulty of industrialization.

[0004]The concentrated acid aging leaching method of stone coal vanadium ore has the advantages of simple process and low energy consumption, but it also has the disadvantages of high acid consumption and low vanadium leaching rate , especially stone coal mines with high CaO content, it is difficult to apply to actual production. Therefore, for stone coal vanadium ore, it is necessary to find a ripening method that is easy to control the process, high resource recovery rate, and green and environmentally friendly. Development Direction of Acid Ripening

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