Method for recycling vanadium from vanadium ore containing high silicon and high carbon via wet process

A carbon-vanadium ore and high-silicon technology, applied in the field of vanadium recovery, can solve the problems of high cost, low conversion rate, and unsuitability for mass production, and achieve the effects of low production cost, high recovery rate, and reduced emissions

Inactive Publication Date: 2010-12-15
JIUJIANG BAIDUN VANADIUM TECH TRADING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technology has good technical indicators and environmental benefits, but the process of extracting vanadium by calcium salt roasting has certain selectivity for roasted products, and there are problems such as low conversion rate and high cost for general ores.
Especially for high-silicon and high-carbon carbonate and silicate mixed vanadium ores with high silicon and carbon content, due to the low-valence characteristics of vanadium in this type of vanadium ores, that is, V 2 o 3 and VO 2 When using the above methods to extract vanadium, the recovery rate of vanadium generally can only reach 34-46%, and the cost is high, so it is not suitable for mass production

Method used

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  • Method for recycling vanadium from vanadium ore containing high silicon and high carbon via wet process
  • Method for recycling vanadium from vanadium ore containing high silicon and high carbon via wet process
  • Method for recycling vanadium from vanadium ore containing high silicon and high carbon via wet process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: Get the vanadium ore powder that is pulverized to more than 200 orders through wet ball milling in a 3000mL beaker, wherein dry vanadium ore powder 1000g, the mass percentage composition of vanadium pentoxide is 0.80%, add 20g sodium chlorate, 250g quality After stirring and mixing industrial sulfuric acid with a percentage of 95% and 1800mL water, perform the first leaching, raise the temperature to 85°C, and keep the temperature at 85-90°C, start mechanical stirring at a speed of 115 revolutions per minute, and stir and leach 4h, and then vacuum filtered to obtain 2100mL of the first leachate. The leaching slag was oxidized and leached for the second time using the above conditions. After the second leaching, the mass percentage of vanadium in the slag was 0.04%, and the two-time leaching rate was 95.4%. Wash it with hot water until it is neutral by pH test paper, and after solid-liquid separation, the leached slag is piled up. Measure the content of va...

Embodiment 2

[0045] Embodiment 2: Get the vanadium ore powder that is pulverized to more than 200 orders through wet ball milling in a 3000mL beaker, wherein dry vanadium ore powder 1000g, the mass percentage composition of vanadium pentoxide is 1.0%, add 10g sodium chlorate, 400g quality The industrial sulfuric acid with a percentage content of 95% and 1000mL water are stirred and mixed, and then the first leaching is carried out, the temperature is raised to 85°C, and the temperature is kept at 85-90°C, and the mechanical stirring is started at a speed of 115 revolutions per minute, and the stirring and leaching 4h, and then vacuum filtered to obtain 1050mL of the first leachate. The leaching slag was oxidized and leached for the second time using the above conditions. After the second leaching, the mass percentage of vanadium in the slag was 0.04%, and the two-time leaching rate was 96.3%. Wash it with hot water until it is neutral by pH test paper, and after solid-liquid separation, th...

Embodiment 3

[0046]Embodiment 3: get the vanadium ore powder that is pulverized to more than 200 orders through wet ball milling in the beaker of 3000mL, (wherein dry vanadium ore powder 1000g), the mass percentage composition of vanadium pentoxide is 1.20%, adds 30g sodium chlorate, 300g of industrial sulfuric acid with a mass percentage of 95% and 2000mL of water, stir and mix evenly for the first leaching, raise the temperature to 85°C, and keep the temperature at 85-90°C, start mechanical stirring at a speed of 115 rpm, Stirring and leaching for 4 hours, and then vacuum filtration to obtain 1900 mL of the first leachate. Using the above conditions, the leaching slag was oxidized and leached for the second time. After the second leaching, the vanadium content in the slag was 0.06%, and the two-time leaching rate was 96.8%. Wash it with hot water until it is neutral by pH test paper, and after solid-liquid separation, the leached slag is piled up. Measure the content of vanadium pentoxi...

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Abstract

The invention provides a method for recycling vanadium from a vanadium ore containing high silicon and high carbon via a wet process, belonging to the technical field of wet-process metallurgy. For a low-quality vanadium ore containing high silicon and high carbon as well as impurities such as aluminum, sulphur, calcium, iron, magnesium and potassium, and the like, the method adopts the following steps to recycle vanadium: ball-milling the ore, oxidizing and leaching with sulphuric acid, separating the leached liquor and leached residue and washing the leached residue to be neutral, adding magnesium powder to reduce the pentavalent vanadium in the leached liquor to tetravalent vanadium, taking mixed liquor of P204 with mass percent of 15%, TBP (Tri-Butyl-Phosphate) with mass percent of 7.5% and aviation kerosene with mass percent of 77.5% as extracting agents to extract the tetravalent vanadium in the once sulphuric acid leached liquor, using 1mol / L of sulphuric acid solution to re-extract vanadium-rich organic extraction phase, oxidizing the re-extracted liquor by sodium chlorate so as to oxidize the reduced tetravalent vanadium in the solution to pentavalent vanadium, depositing the vanadium with ammonia water, and drying and roasting the vanadium deposited residue so as to obtain a product with vanadium pentoxide content above 98%.

Description

technical field [0001] The invention relates to a method for recovering vanadium from high-silicon and high-carbon vanadium ore, in particular to a method for wet-recovering vanadium from high-silicon and high-carbon vanadium ore, and belongs to the technical field of hydrometallurgy. Background technique [0002] Vanadium is a hard, high melting point, nonmagnetic, ductile light gray metal. Vanadium has a wide range of uses. In the iron and steel industry, vanadium steel has the characteristics of high strength, toughness, wear resistance and corrosion resistance. In addition, vanadium is also an important component of various alloys. The main vanadium products used in chemical industry are deep-processed products V 2 o 5 , NH 4 VO 3 (Ammonium metavanadate), NaVO 3 and KVO 3 Wait. They are respectively used in catalysts, ceramic colorants, developers, desiccants and raw materials for the production of high-purity vanadium oxide or ferrovanadium. 98% of the world's p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B3/08C22B3/40
CPCY02P10/20
Inventor 普世坤李巴克葛启明杨兴林周权谢迅
Owner JIUJIANG BAIDUN VANADIUM TECH TRADING
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