Environment-friendly type technique for vanadium extraction of stone coal

A process and environmental protection technology, applied in the direction of vanadium oxide, etc., can solve problems such as pollution and environmental impact, and achieve the effects of reducing environmental pollution, high recovery rate, and low material consumption

Inactive Publication Date: 2007-10-31
邱宏麒
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] 2. Diversification of roasting additives and different pollution conditions: the traditional process uses salt as the additive for vanadium-containing stone coal oxidized sodium roasting, and the hydrogen chloride and chlorine in the roasting flue gas cause serious pollution to the surrounding environment; the roasting additives currently used in production There a

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  • Environment-friendly type technique for vanadium extraction of stone coal
  • Environment-friendly type technique for vanadium extraction of stone coal
  • Environment-friendly type technique for vanadium extraction of stone coal

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[0040] The present invention will be further described below in conjunction with the drawings.

[0041] The new environmentally-friendly process for extracting vanadium from stone coal is as follows:

[0042] 1. Raw material processing

[0043] ①Decarbonization: decarbonize the ore in a flat kiln or a boiling furnace;

[0044] ②Batching: mix decarbonized ore and undecarbonized ore;

[0045] ③Crushing: crush the prepared ore to make the particle size meet the requirements of the ball mill;

[0046] ④ Grinding: Ball mill the broken ore, and the particle size should be controlled below 0.15mm;

[0047] ⑤ Ball formation: the ground ore is balled into ore balls with φ15-20mm.

[0048] Part of the mined ore needs to be decarbonized. The purpose of decarbonization is to remove the excess carbon in the ore, and control the calorific value of the ore entering the roasting to about 400 kcal / kg, so as to avoid the high calorific value causing roasting and coking and reducing the conversion r...

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Abstract

The invention discloses a environment-friendly type craft to extract vanadium from bone coal, which comprises the following steps: processing raw material; blanket-baking; leaching with diluted acid; converting; absorbing with resin; getting ammonium metavanadate; dissolving alkali; proceeding thermal decomposition; producing high-grade vanadic oxide; adopting wet process smoke discharging method and environmental degassing unit to dispose the waste gas; adopting spoil area to dispose waste slag water; using circulating water system to dispose the waste water; removing the pollution for environment; making the direct recovery ratio of pure vanadium reach about 65% and purity of vanadic oxide reach 99%. This invention possesses high recovery ratio, low consumption of material, good quality and low cost, which is a new craft without pollution.

Description

technical field [0001] The invention relates to a technology for extracting vanadium pentoxide from stone coal, in particular to a new environment-friendly technology. Background technique [0002] Vanadium pentoxide, a rare metal, symbol V 2 o 5 , used in metallurgy, chemical industry, petroleum, medical treatment, glass, pigment, electronics, nuclear industry, etc., has great uses. There are hundreds of vanadium-containing minerals, but only vanadium-titanium magnetite and stone coal have industrial mining and utilization value. my country is relatively rich in vanadium resources. According to information, by the end of the last century, my country's annual output of vanadium pentoxide was about 17,000 tons, ranking fourth in the world. my country's enterprises that use stone coal as raw material to extract vanadium developed rapidly in the 1980s. At present, vanadium extraction from stone coal mainly adopts the production process of "additives or no-roasting-leaching-...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 邱宏麒
Owner 邱宏麒
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