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Method for extracting vanadium in coal gangue

A stone coal mine and coal mine technology, applied in the field of flotation decarbonization, can solve the problems of high production cost, low total recovery rate, backward process, etc., and achieve the effects of energy saving, low pollution and simple process

Inactive Publication Date: 2011-04-13
CENT SOUTH UNIV
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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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  • Method for extracting vanadium in coal gangue
  • Method for extracting vanadium in coal gangue

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Embodiment 1

[0024] Adopt the present invention, carried out experiment to a stone coal mine in Sichuan. First, crush and grind the stone coal mine. The grinding fineness of the stone coal mine is -200 mesh, which accounts for more than 70% of the mass. The concentration of the pulp is controlled at 35%-45%. Flotation is carried out at room temperature to obtain carbon concentrate and Vanadium concentrate. Carbon concentrate is added with a binder to make briquettes, and the vanadium concentrate and carbon residue after burning are leached. The leaching agent for vanadium concentrate leaching is sulfuric acid, and the leaching aid is sodium fluorosilicate. The leaching temperature is 90 °. The recovery rate of flotation vanadium is 90.65%, the leaching rate is 90%, and the total recovery rate of vanadium in this ore is 81.58%. The specific indicators are as follows:

[0025] Flotation results of a stone coal mine in Sichuan

[0026] product

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Abstract

The invention discloses a method for extracting vanadium in coal gangue. The method comprises the following steps: a, crushing the coal gangue, carrying out flotation after ore grinding; selecting coal and removing carbon to select coal concentrate ore; then selecting vanadium concentrate ore, wherein the coal gangue with the ore grinding fineness of 200 meshes accounts for 70%, and the mass concentration of the flotation pulp is 35-45%; b, adding a bonder into the coal concentrate ore to prepare molded coal which is used for supplying heat for vanadium concentrate ore during leaching by utilizing steam generated by a boiler; c, supplying heat for the vanadium concentrate ore by adopting the steam generated by burning of the coal concentrate ore to leach vanadium; and d, mixing residue obtained after the burning of the coal concentrate ore into the vanadium concentrate ore to leach the vanadium. The method provided by the invention has the advantages of simple process, energy consumption conservation, small pollution and the like.

Description

technical field [0001] The invention relates to a method for extracting vanadium from stone coal mines, in particular to a method for flotation decarburization and flotation enrichment of vanadium. 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 warships. Hydrofoils, introducers, rocket engine shells, etc. In addition, vanadium is used as the positive electrode in the form of va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/00C22B3/08C22B34/22
CPCY02P10/20
Inventor 孙伟胡岳华王丽耿志强刘润清
Owner CENT SOUTH UNIV