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Process for producing vanadium oxide for implementing wastewater circulation with ionic exchange

A production method and ion exchange technology, applied in the field of vanadium oxide extraction, can solve the problems of reduced vanadium recovery rate, high cost, increased links, etc., and achieve the effects of improving leaching rate and avoiding environmental pollution

Active Publication Date: 2010-06-09
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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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
This method reduces the total amount of ammonia-containing wastewater, but still requires deammonization and desodium wastewater treatment, so the technical and economic problems of difficult treatment and high cost of ammonia nitrogen wastewater still exist, and because the treatment process is long and links increase, vanadium The recovery rate of the
[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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  • Process for producing vanadium oxide for implementing wastewater circulation with ionic exchange
  • Process for producing vanadium oxide for implementing wastewater circulation with ionic exchange
  • Process for producing vanadium oxide for implementing wastewater circulation with ionic exchange

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 (6) is a round of circulation.

[0042] (1) Prepare roasted clinker:

[0043] The common vanadium slag of composition shown in table 1 is ground to below 0.098mm, gets 28kg of ground vanadium slag powder, after mixing with lime 1.96kg (ground to below 0.1mm) of CaO content ≥ 98%, after 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 slowly add sulfuric a...

Embodiment 2

[0070] 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 (6) is a round of circulation.

[0071] (1) Prepare roasted clinker:

[0072] Grind the vanadium slag shown in Table 5 to below 0.098mm.

[0073] Table 5 Main components of vanadium slag (%)

[0074] V 2 o 5

CaO

mn

P

K+Na

13.75

4.93

6.56

0.049

0.19

[0075] 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.

[0076] (2) Clinker leaching:

[0077] Take 500g of finely ground clinker, add 1250mL of last residue washing water (clean water for the first round) to prepare a slurry, add 32wt% to 65wt% sulfuri...

Embodiment 3

[0099] 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 (6) is a round of circulation.

[0100] (1) Prepare roasted clinker:

[0101] 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.

[0102] Table 9 main components of vanadium slag (%)

[0103] V 2 o 5

CaO

mn

P

K+Na

12.68

2.15

5.98

0.147

0.18

[0104] (2) Clinker leaching:

[0105] Take 500g of finely ground clinker, add 1000mL of the last residue washing water (clean water for the first round) to prepare a slurry, and continuously and slowly add 32wt% to 75wt% of sulfuric acid under stirring conditions ...

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Abstract

The invention relates to a method for producing vanadium oxide by utilizing ion exchange to realize wastewater circulation and belongs to the field of the extraction of the vanadium oxide. The technical problem which is solved by the invention is to provide a method for producing the vanadium oxide, in which a high-quality vanadium product can be obtained and the problems that vanadium extractionwastewater reaches the emission standard and is recycled are thoroughly solved. The method for producing the vanadium oxide comprises the following steps: the vanadium oxide is prepared by the steps of the preparation of raw materials, calcification and roasting, infiltration, solid-liquid separation, ion exchange and impurity removal, vanadium precipitation, calcination and deamination or deoxidation and other steps; and the vanadium extraction wastewater is subjected to neutralizing treatment by using lime cream and returns a system for recycling, thereby realizing the zero emission of the wastewater. The method also improves the reclaiming rate of vanadium which is higher than that of the current process, and reduces production cost. The method is combined with other technologies to convert residue and other wastes after vanadium extraction into secondary resource for reutilization, thereby realizing clean production.

Description

technical field [0001] The invention relates to a production method of vanadium oxide which utilizes ion exchange to realize waste water circulation, and 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 C1, (NH 4 ) 2 CO 3 or NH 4 NO 3 Wait for the ammonium salt, and adjust the pH of the solution to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G31/02
CPCC22B3/08C22B3/42C01G31/02C22B3/44C01G31/003C01P2006/80C22B34/22Y02P10/20
Inventor 彭毅付自碧潘平刘淑清张林谢屯良李大标何绍刚王晶邓孝伯王永钢
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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