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Alum extracting technique for clay ore by wet method

A clay ore and wet process technology, which is applied in the field of clay ore wet extraction of vanadium, and wet extraction of vanadium valuable metals, can solve the problem of low vanadium leaching rate and vanadium recovery rate, high vanadium extraction cost and long leaching time. and other problems, to achieve the effect of high recovery rate, easy and controllable treatment of three wastes

Inactive Publication Date: 2008-07-09
UNIV OF SCI & TECH BEIJING
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

Chinese patent CN1872701 discloses a "method for extracting vanadium pentoxide from clay ore by furnaceless oxidation". Low leaching and vanadium recovery (60%)

Method used

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  • Alum extracting technique for clay ore by wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. The original clay ore is crushed to 0.15mm to make mineral powder;

[0025] 2, 500 grams of solid powder, clay mineral powder 78% by weight percentage, manganese dioxide 2%, sulfuric acid 18%, hydrofluoric acid 2%, add water until the liquid-solid volume ratio is 4: 1 and stir evenly to prepare ore-forming slurry;

[0026] 3. Put the well-stirred ore pulp into a constant temperature stirring tank for acid leaching. The time is 10 hours, the temperature is 90°C, the stirring speed is 800r / min, and the acid leaching rate of vanadium is 92.1%;

[0027] 4. The material after the leaching reaction is separated from solid and liquid through a suction filter, and the filter residue is washed and used for building materials or mine landfill;

[0028] 5. Add sodium carbonate to the separated filtrate to adjust the pH value to 2.5. The vanadium compound, iron, aluminum and some silicon in the filtrate form co-precipitation, the precipitate is clarified, and the solid-liquid s...

Embodiment 2

[0035] 1. The original clay ore is crushed to 0.1mm to make mineral powder;

[0036] 2, 500 grams of solid powder, by weight percentage, clay mineral powder 72%, manganese dioxide 3%, sulfuric acid 20%, hydrofluoric acid 5%, add water until the liquid-solid volume ratio is 5: 1 and stir evenly;

[0037] 3. Put the well-stirred ore pulp into a constant temperature stirring tank for acid leaching. The time is 10 hours, the temperature is 100°C, the stirring speed is 800r / min, and the acid leaching rate of vanadium is 93.2%.

[0038]4. The material after the leaching reaction is separated from solid and liquid through a suction filter, and the filter residue is washed and used for building materials or mine landfill;

[0039] 5. Add sodium carbonate to the separated filtrate to adjust the pH value to 2.5. The vanadium compound, iron, aluminum and some silicon in the filtrate form co-precipitation, the precipitate is clarified, and the solid-liquid separation is carried out throug...

Embodiment 3

[0046] 1. Clay ore is crushed to 0.1mm to make mineral powder;

[0047] 2. 500 grams of solid powder, 80% by weight of clay mineral powder, 2% sodium chlorate, 15% sulfuric acid, 3% hydrofluoric acid, add water until the liquid-solid volume ratio is 3: 1 and stir evenly;

[0048] 3. Put the evenly stirred pulp into a constant temperature stirring tank for acid leaching. The time is 8 hours, the temperature is 80°C, the stirring speed is 900r / min, and the acid leaching rate of vanadium is 90.3%;

[0049] 4. The material after the leaching reaction is separated from solid and liquid through a suction filter, and the filter residue is washed and used for building materials or mine landfill;

[0050] 5. Add sodium carbonate to the separated filtrate to adjust the pH value to 3. The vanadium compound, iron, aluminum and some silicon in the filtrate form co-precipitation, the precipitate is clarified, and the solid-liquid separation is carried out through the suction filter, and the...

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Abstract

The invention relates to a wet process vanadium extraction technology of clay ore, providing a valuable metal technology for extracting vanadium by wet process from vanadium clay ore, which belongs to the non-ferrous metal metallurgical technology field. The invention is characterized in that disintegrating clay ore, proceeding thermostatic mixing acid leaching reaction as adding sulfuric acid, fluohydric acid and oxidation agent under certain liquid solid volumetric ratio, separating solid and liquid, removing out iron and aluminum and recycling to utilize after leaching solution being treated by multistep pH value regulation and alkali deposition solubilization reaction, depositing vanadium by ammonium salt after purified vanadium being regulated pH value, filtering, drying and calcining ammonium metavanadate which is prepared to obtain vanadium pentoxide powder. The invention directly leaches clay ore mixing with acid, has high acid leaching rate, lower energy consumption, short technical process, easy operation and control, low productive cost, environment-friendly and safety, realizes zero discharge in the production process, has no waste gas generation, and recycles waste water and valuable metal, and the recycle rate of vanadium reaches 70-75%, purity of vanadium pentoxide of the product is larger than 99%.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metallurgy, relates to a process for extracting vanadium by wet method from clay ore, and provides a process for extracting vanadium valuable metal by wet method from vanadium-containing clay ore. Background technique [0002] my country's clay ore is mainly distributed in Hunan, Hubei, Shaanxi, Henan and other places, among which the clay ore vanadium resources in Xichuan County, Henan Province are very rich, and the total average grade of the whole mining area reaches 0.987%, which is one of the few extra large vanadium ore resources in my country. Vanadium ore is a high-silicon ore with a silicon content of more than 80%. In clay vanadium ore, vanadium mica, illite and kaolinite co-exist in cryptocrystalline interlayers. When the ore is ball-milled, it is easy to muddy into mud with a particle size of less than 400 meshes, and chemical flotation cannot be carried out; because vanadium mica an...

Claims

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Application Information

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IPC IPC(8): C22B34/22C22B3/04C01G31/02
CPCY02P10/20
Inventor 冯雅丽李浩然罗小兵卢寿慈粱江龙
Owner UNIV OF SCI & TECH BEIJING
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