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Method for producing vanadium pentoxide by utilizing vanadium slag

A technology of vanadium pentoxide and vanadium slag, which is applied in the direction of vanadium oxide, etc., and can solve the problems of complex process and high cost

Inactive Publication Date: 2008-07-09
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the above, it can be seen that the existing vanadium leaching process of alkali metal salt roasted vanadium slag is more suitable for high vanadium and low silicon (V2O For vanadium slag with 5 content > 10% and silicon-vanadium ratio ≤ 1.1), the acid leaching method with complex process and high cost is adopted for vanadium slag with low vanadium and high silicon

Method used

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  • Method for producing vanadium pentoxide by utilizing vanadium slag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0054] Weigh 2000g of 1# vanadium slag and 110g of sodium chloride and mix them well, put them into two 1000ml porcelain bowls; Insulate at 820°C for 60 minutes; take it out of the furnace and cool it quickly, grind it slightly and then soak it in water, and adjust the pH value of the water soaking to 9.0; filter; add calcium chloride to the filtrate, heat to completely precipitate the impurities, and then filter; adjust the pH value of the filtrate to 1.8, Heating to 80°C to boiling, adding ammonium sulfate with 1.4 times the mass of vanadium element to precipitate vanadium for 60 minutes, cooling for 60 minutes, and filtering to obtain ammonium polyvanadate filter cake; calcining the ammonium polyvanadate filter cake at a temperature of 500°C for 60 minutes to obtain GB3283-87 standard vanadium pentoxide is 33.9g, the grade is 98.5%, the amount of residual vanadium pentoxide in the waste residue is 0.55%, and the total yield of vanadium is 72.59%.

Embodiment 2

[0056] Weigh 1000g of 2# vanadium slag and 100g of sodium carbonate, mix well and put it into a 1000ml porcelain bowl; place it in a roasting furnace at 400°C, raise the temperature to 700°C in 10 minutes, raise the temperature to 750°C in 60 minutes, and then raise the temperature to 760°C in 80 minutes Keep warm for 50 minutes; cool down quickly after being out of the oven, and soak in water after a little grinding. Filtrate; adjust the pH value of the filtrate to 1.8, heat to 80°C until boiling, add ammonium sulfate with 1.4 times the mass of vanadium element to precipitate vanadium for 60 minutes, cool for 60 minutes, and filter to obtain ammonium polyvanadate filter cake; The ammonium acid filter cake was calcined for 60 minutes to obtain 39.3 g of vanadium pentoxide conforming to the GB3283-87 standard, with a grade of 98.6%, the amount of residual vanadium pentoxide in the waste residue was 0.90%, and the total vanadium yield was 76.73%.

Embodiment 3

[0058] Weigh 1000g of 2# vanadium slag, 50g of sodium carbonate and 55g of sodium chloride, mix them well, put them into a 1000ml porcelain bowl; put them in a roasting furnace at 500°C, heat up to 700°C in 10 minutes, and rise to 750°C in 80 minutes, then use Heat up to 800°C for 90 minutes and keep warm for 30 minutes, then cool down quickly after being out of the oven, grind it slightly, and soak in water, the pH of water immersion is 8.4; filter; add a little alkali to the filtrate to adjust the pH to 9.0, then add calcium chloride to the filtrate, heat to make The impurities are completely precipitated, and then filtered; adjust the pH value of the filtrate to 1.8, heat to 80°C until boiling, add ammonium sulfate with 1.4 times the mass of vanadium element to precipitate vanadium for 60 minutes, cool for 60 minutes, and filter to obtain ammonium polyvanadate filter cake; at 500°C The ammonium polyvanadate filter cake was calcined for 60min at high temperature to obtain 40....

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Abstract

The invention discloses a process for producing vanadic anhydride by vanadium slag. The steps of the process comprise as follows: a, adding alkali metal salt in the vanadium slag, and mixing with each other uniformly, a mixture is obtained. b, laying the mixture obtained by step a into a calcining furnace to oxidize and calcine, vanadium slag grog is obtained. c, the calcined vanadium slag is discharged out of the furnace, fast cooling and performing water immersion. d, filtering the mixture obtained by step c, filter liquor is obtained. e, removing impurities in the filter liquor. f, adjusting the pH value of the filter liquor obtained by step e, adding ammonium salt to precipitate vanadium and filtering the filter liquor, then, ammonium peroxovanadate filter cake and ammonium metavanadate filter cake are obtained. g, calcining the filter cake after vanadium precipitation obtained by step f, and vanadic anhydride is obtained, wherein the content of the vanadic anhydride in the vanadium slag used in step a is 2.0%-8.0%. The invention has the advantages of simple and easy, low facility request, convenient operation and low cost, further, the residual quantity of the vanadic anhydride in waste slag is 0.55%-1.0%, which has fine economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for producing vanadium pentoxide by utilizing vanadium slag, more specifically, relates to a method for producing vanadium pentoxide by utilizing high-silicon and low-vanadium vanadium slag. Background technique [0002] The method of producing vanadium pentoxide by using vanadium slag (vanadium-containing steel slag) as a raw material is an important method for industrially producing vanadium pentoxide. Low-vanadium vanadium slag is produced in the steelmaking process of vanadium-containing molten iron, and the vanadium grade is generally 2% to 8% (in V 2 o 5 count, the same below), and the rest are oxides of iron, silicon, magnesium, aluminum, calcium, etc. The extraction of vanadium pentoxide from low-vanadium vanadium slag, especially the extraction of vanadium pentoxide from high-silicon and low-vanadium slag with higher silicon dioxide content than vanadium pentoxide content is still a prominent problem in the ...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 边悟孙朝晖彭毅张帆付自碧张林董艳华周宗权李纪仁
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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