Method for enrichment of vanadium from stone coal mine in a manner of low consumption and high efficiency

Abstract

The invention discloses a method for enrichment of vanadium from stone coal mines in a manner of low consumption and high efficiency The method comprises the steps of crushing the stone coal mines, grinding before flotation, first selecting coal and de-carboning to pick out carbon concentrate and then pick out vanadium concentrate, wherein grinding fineness of the stone coal mines is -200 meshes, mass content is more than 70% and mass concentration of flotation pulp is 35 to 45%; preparing water gas by a gas generator, with the carbon concentrate being a raw material; supplying heat by the heat generated from combustion of the water gas to the vanadium concentrate for vanadium leaching; and mixing residues from the combustion of the carbon concentrate for preparing the water gas with flotation vanadium concentrate to leach the vanadium. By utilizing the carbon concentrate from the flotation of original mines to generate the water gas for heat supplying, the method has the advantages of environment protection, low energy consumption, high recovery rate, etc.

Description

technical field [0001] The invention belongs to the technical field of flotation and leaching of vanadium, relates to a process for extracting vanadium from stone coal, relates to flotation decarburization, flotation enrichment of vanadium, leaching of vanadium, and belongs to the field of comprehensive recycling of rare metals. Background technique [0002] Vanadium is a rare metal with a high melting point and an indispensable resource for the survival and development of human beings. It is known as the "vitamin" of metals. In terms of steel application, about 90% of vanadium in my country is used in the steel industry, and vanadium can be mixed into steel to make vanadium steel. Vanadium steel has a tighter structure than ordinary steel, and has higher toughness, elasticity and mechanical strength; in terms of alloy applications, Ti-6Al-4V, an important alloy composed of vanadium and titanium, is used for aircraft engines, aerospace cabin ship skeletons, missiles, and war...

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Problems solved by technology

my country's vanadium extraction from stone coal mainly adopts the vanadium precipitation process of flat kiln sodium roasting, water leaching and acid precipitation. Although good economic and social benefits are obtained, there are simple equipment, backward technology, low total recovery rate, high production cost, and environmental problems. A series of problems such as serious pollution

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