Novel method for extracting vanadic anhydride from stone coal vanadium ore

Abstract

The invention discloses a novel method for extracting vanadium pentoxide from stone coal-vanadium ore, which comprises the following steps: the stone coal-vanadium ore is crushed, then is directly added with water for wet ball milling, and then is sent into a reaction kettle to stir to leach through acid adding and pressurization, leaching pulp is subjected to solid-liquid separation to obtain leachate, the leachate is pretreated and then is extracted, concentrated and purified, a strip liquor after the extraction is used to precipitate ammonium poly-vanadate, and then a vanadium pentoxide product is obtained through the thermolysis. The method has the advantages of high automation degree of production process, convenient operation, and steady and reliable operation; the yield of vanadium is more than 75 percent, the production cost is lower than those of a sodium method and a normal pressure acid leaching method, the consumption of sulfuric acid is only one third of that of the normal pressure acid leaching method, the grinding of ores adopts a wet ball mill; the method does not bake, has no pollution to the environment, fully utilizes mineral resources and thermal energy, shortens more than one time of leaching time, saves the thermal energy, and reduces the cost; the production process can not destroy the carbon content in the stone coal-vanadium ore, and leaching residue can be used for generating electricity, producing cement, baking bricks and tiles and so on.

Description

technical field [0001] The invention relates to the field of chemical metallurgy, in particular to a new method for extracting vanadium pentoxide from stone coal vanadium ore. Background technique [0002] Vanadium is a rare metal with a high melting point and has many excellent properties. It is widely used in chemical industry, metallurgy and other industries. With the rapid development of my country's modernization, the demand for vanadium and its compounds is increasing. Extracted from vanadium-titanium magnetite. Vanadium-containing stone coal is a new type of vanadium ore resource in my country. Extracting vanadium pentoxide from stone coal is an important aspect of comprehensive utilization of stone coal. my country extracts vanadium from stone coal mainly by sodium roasting-water immersion-ion Conversion—ammonia salt vanadium precipitation process, the total recovery rate of vanadium pentoxide is about 45%, some even lower, the content of vanadium pentoxide in the pro...

AI Technical Summary

Problems solved by technology

Vanadium-containing stone coal is a new type of vanadium ore resource in my country. Extracting vanadium pentoxide from stone coal is an important aspect of comprehensive utilization of stone coal. my country extracts vanadium from stone coal mainly by sodium roasting-water immersion-ion Conversion—ammonia salt vanadium precipitation process, the total recovery rate of vanadium pentoxide is about 45%, some even lower, the content of vanadium pentoxide in the product is ≥98%, the disadvantage of this process is: not only vanadium pentoxide The total recovery rate is low, the cost is high, and the process is more complicated, the labor intensity is high, and what is more serious is that a large amount of hydrogen chloride gas is produced in the sodium roasting, which seriously pollutes the surrounding environment

It still has the disadvantages of roasting, the production process destroys the carbon content in the stone coal mine, the recovery rate of vanadium is only 60%, the consumption of sulfuric acid is high, and the leaching time is long.