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Clean production process for vanadium oxide

A production method and technology for vanadium oxide, applied in vanadium oxide, improvement of process efficiency, etc., can solve problems such as high cost, large consumption of sodium salt and ammonium salt, environmental pollution by sodium salt and ammonium salt, etc., and achieve improved recovery rate , the effect of improving the leaching rate

Active Publication Date: 2010-12-08
攀钢集团西昌钒制品科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the 1960s and 1970s, there have been some inherent defects in the process of extracting vanadium from sodium salts: (1) The CaO content in the vanadium slag is strictly limited, and the CaO content in the slag is generally required to be less than 1.5%, because the slag For every 1% increase in CaO in the medium, the yield of vanadium will decrease by about 4.7% to 9%; (2) the consumption of sodium salt and ammonium salt is relatively large, and the cost is high; (3) a large amount of sodium salt and ammonium salt in the wastewater pollute the environment
[0010] So far, there are no relevant reports that can obtain high-quality vanadium products and completely solve the discharge or recycling of vanadium extraction wastewater

Method used

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  • Clean production process for vanadium oxide
  • Clean production process for vanadium oxide
  • Clean production process for vanadium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Using the clinker prepared in the following step (1), adopt the method of the present invention to carry out 51 rounds of waste water circulation test, from step (2) to step (5) is a round of circulation.

[0042] (1) Prepare roasted clinker:

[0043] With the common vanadium slag of composition shown in table 1, grind to below 0.098mm, get the vanadium slag powder of 28kg grinding, after mixing evenly with the lime 1.96kg (ground to below 0.1mm) of CaO content=98%, in Roast at 860°C for 240 minutes in an oxidative atmosphere, take it out and cool it, and grind it to below 0.18mm for later use.

[0044] Table 1 Main components of vanadium slag (%)

[0045] V 2 o 5

CaO

MnO

P

K+Na

16.67

3.54

9.14

0.04

0.21

[0046] (2) Clinker leaching:

[0047] Take 500g of finely ground clinker, add 2000mL of the last residue washing water (clean water for the first round) to make a slurry, and continuously and sl...

Embodiment 2

[0066] Using the clinker prepared in the following step (1), adopt the method of the present invention to carry out 51 rounds of waste water circulation test, from step (2) to step (5) is a round of circulation.

[0067] (1) Prepare roasted clinker:

[0068] Grind the vanadium slag shown in Table 5 to below 0.098mm.

[0069] Table 5 Main components of vanadium slag (%)

[0070] V 2 o 5

CaO

mn

P

K+Na

13.75

4.93

6.56

0.049

0.19

[0071] Take 28kg of finely ground vanadium slag powder, and another 1.82kg of lime (98% CaO content, ground to below 0.1mm), mix evenly with the finely ground vanadium slag, roast at 950°C for 60min in an oxidizing atmosphere, and take out After cooling, grind to below 0.18mm for later use.

[0072] (2) Clinker leaching:

[0073] Take 500g of finely ground clinker, add 1250mL of the last residue washing water (clean water for the first round) to prepare a slurry, and continuously...

Embodiment 3

[0092] Using the clinker prepared in the following step (1), adopt the method of the present invention to carry out 100 rounds of waste water circulation test, from step (2) to step (5) is a round of circulation.

[0093] (1) Prepare roasted clinker:

[0094] Grind 110 kg of vanadium slag of the composition shown in Table 9 to below 0.098 mm, and take another 7.7 kg of lime (CaO content 98%) that is ground to below 0.1 mm. Roast for 150 minutes in an oxidative atmosphere, cool the roasted clinker and grind it to below 0.18mm for later use.

[0095] Table 9 Main components of vanadium slag (%)

[0096] V 2 o 5

CaO

mn

P

K+Na

12.68

2.15

5.98

0.147

0.18

[0097] (2) Clinker leaching:

[0098] Take 1000g of finely ground clinker, add 2000mL of the last residue washing water (clean water for the first round) to make a slurry, and continuously and slowly add sulfuric acid with a mass concentration of 50% to 75%...

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Abstract

The invention relates to a method for cleanly producing vanadium oxide, which belongs to the field of extraction of vanadium oxide. The technical problems to be solved by the invention is to provide the method for cleanly producing the vanadium oxide which not only can obtain a high-quality vanadium product, but also can ensure that vanadium waste water can be reclaimed. The method for producing the vanadium oxide comprises the following steps: preparing roasting raw materials, calcification roasting; infiltrating, separating solid and liquid, precipitating vanadium by ammonium salt, calcining for deaminating or reducing, and the like. Waste water after vanadium extraction can be returned to a system for recycling after the waste waster is subjected to neutralizing treatment by lime creamso as to realize zero drainage of the waste water. The method also improves the reclamation rate of vanadium to be superior to that of the prior process, and reduces production cost. Through combining with other technologies, the method can change extracted slag and other waste into secondary resource to be used once again, and realize clean production.

Description

technical field [0001] The invention relates to a clean production method of vanadium oxide, which belongs to the field of vanadium oxide extraction. Background technique [0002] The traditional sodium salt vanadium extraction process is based on Na 2 CO 3 、Na 2 SO 4 Common sodium salts such as NaCl or NaCl are used as additives, roasted with vanadium-containing raw materials at high temperature, the vanadium in the raw materials is oxidized to +5 by oxygen in the air, and combined with sodium salts to form sodium vanadate which is easily soluble in water. The roasted product is leached with water, sodium vanadate is dissolved into the solution, and after solid-liquid separation, the vanadium-containing solution is washed with CaCl 2 After removing the main impurities such as P and Si, add (NH 4 ) 2 SO 4 , NH 4 Cl, (NH 4 ) 2 CO 3 or NH 4 NO 3 Wait for the ammonium salt, and adjust the pH of the solution to 1.5-2.5, heat the solution to above 90°C for 40-90 minu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
CPCC22B3/08C22B1/02C22B34/22C01P2006/80C01G31/02C22B3/44Y02P10/20
Inventor 彭毅周一平边悟孙朝晖张帆付自碧
Owner 攀钢集团西昌钒制品科技有限公司
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