Method for extracting vanadic anhydride from stone coal vanadium ore

A technology for vanadium pentoxide and stone coal vanadium, which is applied in the field of extracting vanadium pentoxide, can solve the problems of surrounding air and water pollution, high process requirements, and large equipment investment, and achieve high-grade product quality, shorten the process, and adapt to good sex effect

Inactive Publication Date: 2009-06-10
CNMC NINGXIA ORIENT GRP
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Problems solved by technology

Although this method has no strict requirements on the ore, adding sodium salt will produce a large amount of HCl and Cl when the ore is roasted. 2 Waste gas such as waste gas and Na-containing wastewater cause serious pollution of surrounding air and water bodies, so large-scale production cannot be carried out
From a foreign point of view, the United States has the technology of extract

Method used

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  • Method for extracting vanadic anhydride from stone coal vanadium ore

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Effect test

Embodiment 1

[0033] will V 2 o 5 The stone coal vanadium ore with a grade of 1.5% was ground to 60 mesh, weighed 500 g, roasted at 600° C. for 60 min, and cooled naturally after taking it out. Take by weighing again the stone coal vanadium ore 400g after corresponding roasting, drop into in the dilute sulfuric acid of 10% (weight), dilute sulfuric acid consumption is 10% (weight) of stone coal vanadium ore, at 90 ℃ of conditions, insulation 24h, use High-efficiency microporous filter filtration, filtrate with 10% N 235 +5%TBP+85%sulfonated kerosene for 4-stage extraction, 3-stage Na 2 CO 3 Stripping, Na 2 CO 3 The concentration is 50-150g / l, the stripping solution is precipitated with ammonium chloride, and then the pH value is adjusted to 7.5 with sulfuric acid, heated to 85°C and kept for 30 minutes to complete the vanadium precipitation process, filtered with a high-efficiency microporous filter, and heated with a hot Washing solution (pure water). Deamination at 280°C for 1 hour...

Embodiment 2

[0035] will V 2 o 5 The stone coal vanadium ore with a grade of 1.2% was ground to 80 mesh, weighed 500 g, roasted at 700° C. for 90 min, and cooled naturally after taking it out. Take by weighing again the stone coal vanadium ore 400g after corresponding roasting, drop into in the dilute sulfuric acid of 10% (weight), dilute sulfuric acid consumption is 10% (weight) of stone coal vanadium ore, at 90 ℃ of conditions, insulation 24h, use High-efficiency microporous filter filtration, filtrate with 15% N 235 +5%TBP+80%sulfonated kerosene for 4-stage extraction, 3-stage Na 2 CO 3 Stripping, Na 2 CO 3 The concentration of vanadium is 50-150g / l, the stripping solution is precipitated with ammonia water, and then the pH value is adjusted to 8 with sulfuric acid, heated to 85°C and kept for 30 minutes to complete the vanadium precipitation process, filtered with a high-efficiency microporous filter, and washed with hot washing liquid Wash (pure water). Deamination at 280°C for...

Embodiment 3

[0037] will V 2 o 5 The stone coal vanadium ore with a grade of 1.1% was ground to 100 mesh, weighed 1200kg, roasted at 800° C. for 2 hours, and cooled naturally after taking it out. Take by weighing again the stone coal vanadium ore 1000kg after corresponding roasting, drop into in the dilute sulfuric acid of 10% (weight), dilute sulfuric acid consumption is 15% (ml / g) of stone coal vanadium ore, at 90 ℃ of conditions, insulation 24h , filtered with a high-efficiency microporous filter, and the filtrate was filtered with 10% N 235 +5%TBP+85%sulfonated kerosene for 4-stage extraction, 3-stage Na 2 CO 3 Stripping, Na 2 CO 3 The concentration of vanadium is 50-150g / l, the stripping solution is precipitated with ammonia water, and then the pH value is adjusted to 6 with sulfuric acid, heated to 85°C and kept for 30 minutes to complete the process of vanadium precipitation, filtered with a high-efficiency microporous filter, and washed with hot water Liquid washing (pure wat...

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Abstract

The invention relates to a method for extracting V2O5 from stone coal vanadium ores, which is characterized in that the stone coal vanadium ores are grinded, subjected to high-temperature roasting, and directly leached out by a dilute sulfuric acid; slag is washed and filtered by water; and a leached solution is extracted by extract containing an N235 extractant, and subjected to back-extraction, ammonium metavanadate precipitation, filtration, washing, deamination and roasting to obtain the V2O5. The method greatly reduces pollution of waste gas and waste water. Compared with the prior salt roasting (sodium modification) technology, the technology has a reasonable design structure, high comprehensive utilization rate of resources, proper material consumption, strong controlled ability of the process, high product quality and high automation degree of the technological flow, and is convenient for large-scale industrial production. The technology does not have exact demands on the raw ores and has good adaptability. The overall yield of the technology is high, reaches more than 85 percent, is on the advanced level in China currently, and is improved by approximately 25 percent compared with the overall yield of sodium modification roasting technology of other vanadium smelting plants in Hunan province.

Description

technical field [0001] The invention relates to a method for extracting vanadium pentoxide from stone coal vanadium ore. Background technique [0002] At present, most of the vanadium extraction from stone coal in China adopts salt roasting, P 204 Extraction process, the process flow is ore crushing, ball milling, decarburization and oxidation by adding salt, roasting at a temperature of 800-900°C, crushing of ore balls, leaching with sulfuric acid at a temperature of 80-100°C, P 204 Extraction and stripping, ammonia precipitation, ammonium metavanadate washing and dehydration, burning into vanadium pentoxide (V 2 o 5 ). The process has high labor intensity, high energy consumption, low comprehensive recovery rate and serious pollution of three wastes. In order to eliminate serious waste gas pollution and improve the recovery rate, many domestic research institutes have carried out exploration and research in various ways in the past ten years. For example, although the ...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/08C22B3/26C01G31/02
CPCY02P10/20
Inventor 米玺学麻建军严国元兰炜锋董群伟
Owner CNMC NINGXIA ORIENT GRP
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