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Recovery method of hydrometallurgy iron slag

A recovery method, hydrometallurgy technology, applied in the field of hydrometallurgy iron slag recovery, to achieve good application prospects, low equipment requirements, and low energy consumption

Inactive Publication Date: 2022-02-15
GUANGDONG JIANA ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a recovery method for hydrometallurgy iron slag, aiming to solve the technical problem of how to recover waste iron slag at low cost

Method used

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  • Recovery method of hydrometallurgy iron slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Prepare raw materials: collect 100g of solid waste iron slag purified in the iron removal workshop, and its composition and content include: Co0.5%, Cu 0.03%, Fe9.4%, Na 0.2%.

[0042] (2) Pretreatment: with a solid-to-liquid ratio of 1g:5ml, the iron slag is washed with pure water for 1h, and then filtered to obtain the first leaching slag. The leaching solution can be recycled and used, and then use 0.5mol / L 95% sulfuric acid The solution is mixed with the first leaching residue after washing, stirred for 1 hour and then filtered to obtain the second leaching residue, and the leaching solution is used to recover cobalt.

[0043] (3) Sulfidation precipitation: add the pretreated second leaching slag into a beaker, add excess scrap iron filings, 5g / L sodium sulfide solution and sulfuric acid solution, keep the pH value of the solution at 2.0, heat to 60 ° C, and react After 3 hours, the solution was filtered to obtain a filtrate containing ferrous sulfate and a prec...

Embodiment 2

[0047] (1) Prepare raw materials: collect 100g of solid waste iron slag purified in the iron removal workshop, and its composition and content include: Co0.8%, Cu0.06%, Fe13.6%, Na 0.3%.

[0048] (2) Pretreatment: with a solid-to-liquid ratio of 1g:5ml, the iron slag is washed with pure water for 1h, and then filtered to obtain the first leaching slag. The leaching solution can be recycled and used, and then use 0.5mol / L 98% sulfuric acid The solution is mixed with the first leaching residue after washing, stirred for 1 hour and then filtered to obtain the second leaching residue, and the leaching residue liquid is used to recover cobalt.

[0049] (3) Sulfidation precipitation: add the pretreated second leaching slag into a beaker, add excess scrap iron filings, 7.5g / L sodium sulfide solution and sulfuric acid solution, keep the pH value of the solution at 1.5, and heat to 70°C, The reaction was carried out for 3 hours, and then the solution was filtered to obtain a filtrate c...

Embodiment 3

[0053] (1) Prepare raw materials: collect 100g of solid waste iron slag purified in the iron removal workshop, and its composition and content include: Co0.8%, Cu0.06%, Fe13.6%, Na0.4%.

[0054] (2) Pretreatment: with a solid-to-liquid ratio of 1g:5ml, the iron slag is washed with pure water for 1h, and then filtered to obtain the first leaching slag. The leaching solution can be recycled and used, and then use 0.5mol / L 98% sulfuric acid The solution is mixed with the first leaching residue after washing, stirred for 1 hour and then filtered to obtain the second leaching residue, and the leaching solution is used to recover cobalt.

[0055] (3) Sulfidation method precipitation: add the pretreated second leaching slag into a beaker, add excess scrap iron filings, 10g / L sodium sulfide solution and sulfuric acid solution, keep the pH value of the solution at 1.5, heat to 90 ° C, and react After 3 hours, the solution was filtered to obtain a filtrate containing ferrous sulfate and...

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Abstract

The invention relates to the technical field of metal smelting recovery processes, in particular to a recovery method of hydrometallurgy iron slag. The method comprises the following steps: washing and filtering waste iron slag with water to obtain first leaching slag; mixing the first leaching residues with a first sulfuric acid solution, and filtering to obtain second leaching residues; mixing the second leaching residues with scrap iron, a sodium sulfide solution and a second sulfuric acid solution, adjusting the pH value to 1.5-2.0, heating at the temperature of 60-90 DEG C, and filtering to obtain filtrate containing ferrous sulfate and precipitation residues; and adding a third sulfuric acid solution and a hydrogen peroxide solution into the filtrate containing ferrous sulfate, and carrying out hydrolytic polymerization reaction at the temperature of 50-90 DEG C to obtain a polymeric ferric sulfate solution. The method not only can recycle cobalt effectively , but also can prepare polymeric ferric sulfate efficiently, and has the advantages of being low in equipment requirement, short in process and low in energy consumption.

Description

technical field [0001] The application belongs to the technical field of metal smelting recovery technology, and in particular relates to a recovery method of hydrometallurgy iron slag. Background technique [0002] Enterprises will produce a certain amount of solid by-products during leaching, purification and back-end sewage treatment after hydrometallurgy (such as cobalt). On the one hand, solid by-products need to be stockpiled on site; on the other hand, they are mixed with valuable metals, causing certain losses. Currently jarosite slag is used to make bricks, but because the amount of slag is too large, the amount of slag consumed by brick-making equipment is far less than the amount of slag produced, and the bricks made are currently unmarketable, resulting in a large amount of iron slag accumulation, which not only occupies A large number of sites are stockpiled, and long-term storage also has a great potential for environmental pollution. [0003] The publication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C01G49/14
CPCC22B7/007C22B23/043C22B23/0461C01G49/14Y02P10/20
Inventor 叶伟明郑江峰何玉娴
Owner GUANGDONG JIANA ENERGY TECH CO LTD
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