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Method for extracting manganese metal from vanadium precipitation wastewater and vanadium extraction tailings

A technology for extracting vanadium tailings and vanadium-precipitated wastewater, which is applied to the improvement of process efficiency, photography technology, instruments, etc.

Active Publication Date: 2016-01-06
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

[0005] In the above patents, the manganese resources in the vanadium precipitation wastewater and the vanadium extraction tailings are not recycled

Method used

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  • Method for extracting manganese metal from vanadium precipitation wastewater and vanadium extraction tailings
  • Method for extracting manganese metal from vanadium precipitation wastewater and vanadium extraction tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 5000mL of vanadium precipitation wastewater (containing manganese 10.20g / L, vanadium 0.25g / L, pH=1.5), add vanadium extraction tailings 5000g (containing manganese 4.82%, vanadium 1.24%), start stirring, and use acidity regulator ([ h + ]=1mol / L) to adjust the acidity of the system to 2.5, heated to 80°C in a water bath, filtered after stirring for 2h to obtain the first filtrate (containing manganese 12.30g / L, vanadium 0.39g / L) and residue (containing manganese 2.58%, vanadium 1.03%); in the first filtrate, add ferrous sulfate 3.0g / L in the first filtrate, stir and react at 70°C for 80min, use ammonia water to adjust pH to 6.0 after the reaction is completed, and carry out solid-liquid separation to obtain the second filtrate and vanadium-containing Slag (in V 2 o 5 Calculated as 16.2%); add manganese dioxide solid 2g / L second filtrate to the second filtrate, feed air, react at 60°C for 1.5h; use ammonia water to adjust pH to 7.0, add activated carbon 1.0g / L sec...

Embodiment 2

[0041] Take 5000mL of vanadium precipitation wastewater (containing manganese 8.30g / L, vanadium 0.20g / L, pH=2.0), add vanadium extraction tailings 7500g (containing manganese 4.82%, vanadium 1.24%), start stirring, and use acidity regulator ([ h + ]=2mol / L) to adjust the acidity of the system to 1.5, heated to 70°C in a water bath, stirred and reacted for 1.5h and filtered to obtain the first filtrate (containing manganese 12.20g / L, vanadium 0.61g / L) and residue (containing manganese 2.05%, Vanadium 0.92%); In the first filtrate, adding mass concentration is 6% sulfurous acid 9.0mL / L first filtrate (that is, 9ml sulfurous acid is added in the first 1L filtrate), stirred and reacted 40min under 60 ℃, after the completion of the reaction, use Ammoniacal liquor adjusts pH to 6.0, carries out solid-liquid separation and obtains the second filtrate and vanadium-containing slag (with V 2 o 5Calculated as 24.4%); feed air into the second filtrate, and react for 1h at 60°C; adjust t...

Embodiment 3

[0043] Take 5000mL of vanadium precipitation wastewater (containing manganese 14.50g / L, vanadium 0.30g / L, pH=2.5), add vanadium extraction tailings 6000g (containing manganese 5.74%, vanadium 1.42%), start stirring, and use an acidity regulator ([ h + ]=2mol / L) to adjust the acidity of the system to 2.0, heated to 60°C in a water bath, filtered after stirring for 3h to obtain the first filtrate (containing manganese 18.20g / L, vanadium 0.56g / L) and residue (containing manganese 2.30%, vanadium 1.11%); in the first filtrate, add 2.5g / L of iron filings (metal iron content in the iron filings is greater than 80%), stir and react at 70°C for 80min, adjust the pH to 6.5 with ammonia water after the reaction is completed, and carry out solid-liquid separation to obtain The second filtrate and vanadium-containing slag (in V 2 o 5 Calculated as 20.6%); in the second filtrate, add manganese dioxide solid 1.5g / L second filtrate, pass into air, react at 60°C for 1.0h; use ammonia water ...

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Abstract

The invention relates to a method for extracting manganese metal from vanadium precipitation wastewater and vanadium extraction tailings, belonging to the technical field of metallurgical and chemical industries. The method for extracting manganese metal from vanadium precipitation wastewater and vanadium extraction tailings comprises the following steps of (1) mixing vanadium precipitation wastewater and vanadium extraction tailings, heating to 60-80 DEG C, and carrying out solid-liquid separation after reacting by stirring to obtain a first filtrate and residues; (2) adding a reducing agent into the first filtrate to reduce pentavalent vanadium in the solution into tetravalent vanadium, and then, filtering to obtain a second filtrate; (3) adding an antioxidant into the second filtrate, and reacting at the temperature of 50-60 DEG C to oxidize the unreacted reducing agent in the step (2); (4) adding activated carbon or suspended matters or suspended particles in a polyacrylamide adsorption solution, and then, filtering after uniformly stirring to obtain a third filtrate; and (5) adding selenium dioxide or sulfurous acid into the third filtrate to electrolyze to obtain manganese metal and an electrolytic anode solution. The invention provides an effective approach for recovering manganese resources in the vanadium precipitation wastewater and the vanadium extraction tailings.

Description

technical field [0001] The invention relates to a method for extracting manganese metal by utilizing vanadium precipitation waste water and vanadium extraction tailings, belonging to the technical field of metallurgy and chemical industry. Background technique [0002] In the clean production process of vanadium oxide, the vanadium slag extracted from the converter is used as raw material, and the vanadium oxide product is produced by calcification roasting-sulfuric acid leaching-acid ammonium salt vanadium precipitation process. This process technology solves the problem that the existing sodium salt roasting-water leaching-acid ammonium salt vanadium precipitation process leaching tailings and solid waste sodium sulfate produced by wastewater treatment are difficult to handle, and has the advantage of low wastewater treatment cost. Since the vanadium slag used in the production of vanadium oxide contains not only vanadium, but also a large amount of manganese, after iron r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B7/04C25C1/10C22B34/22
CPCY02P10/20
Inventor 陈燕彭毅刘恢前何文艺申彪刘武汉叶露钟国梅陈相全
Owner 攀钢集团西昌钒制品科技有限公司
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