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A method for leaching, recovering and separating nickel from manganese-sulfur purification waste residue

A waste slag and leaching technology, which is applied in the direction of improving process efficiency, can solve the problems of low metal recovery rate and large consumption, and achieve the effects of improving leaching efficiency, avoiding pollution, and simple and easy process

Active Publication Date: 2021-02-12
广西下田锰矿有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dosage of sodium formex reagent is large, the metal recovery rate is low, and no specific metal separation has been carried out.
[0007] At present, there is no feasible treatment plan for sulfur and manganese purification waste residue that can fix sulfur and can be efficiently and simply leached and recovered

Method used

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  • A method for leaching, recovering and separating nickel from manganese-sulfur purification waste residue
  • A method for leaching, recovering and separating nickel from manganese-sulfur purification waste residue

Examples

Experimental program
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Embodiment 1

[0055] After crushing 10g of manganese-sulfur purification waste residue, pass through a 40-mesh sieve, and add 5g of MnO to the manganese-sulfur purification waste residue. 2 and 7g of iron powder, add 80mL of 0.5mol / L sulfuric acid solution, heat to 80°C, and stir on a 100r / min stirrer, after leaching for 30min, filter the leaching solution to obtain the leaching solution and adjust pH=4 with limestone to remove iron, filter the solution, and The solution was concentrated to 20 mL. Dilute 20mL P204 with 20mL sulfonated kerosene to prepare the extractant, then saponify with sodium hydroxide, the saponification rate is 10%, then add the extractant to the concentrated solution, stir on a 100r / min magnetic stirrer for 10min, then transfer the extract to Enter the separatory funnel to carry out phase separation, and the obtained organic phase is back-extracted with 1mol / L sulfuric acid to recover and separate manganese sulfate, and the recovery rate of manganese is measured to be...

Embodiment 2

[0057] After pulverizing 10g of manganese-sulfur purification waste residue, pass through a 40-mesh sieve, add 7gMnO to the manganese-sulfur purification waste residue in sequence 2 and 7g of iron powder, add 80mL of 0.5mol / L sulfuric acid solution, heat to 85°C, stir on a 100r / min stirrer, and after leaching for 30min, filter the leaching solution to obtain the leaching solution and use limestone to adjust pH=4 to remove iron, filter the solution, and The solution was concentrated to 20 mL. Dilute 30mL LP204 with 15mL sulfonated kerosene to prepare the extractant, then saponify with sodium hydroxide, the saponification rate is 60%, then add the extractant to the concentrated solution, stir on a 100r / min magnetic stirrer for 10min, then transfer the extract to Put it into a separatory funnel for phase separation, and the obtained organic phase is back-extracted with 1mol / L sulfuric acid to recover and separate manganese sulfate, and the recovery rate of manganese is measured t...

Embodiment 3

[0059] After pulverizing 10g of manganese-sulfur purification waste residue, pass through a 40-mesh sieve, add 9g of MnO to the manganese-sulfur purification waste residue in sequence 2 and 7g of iron powder, add 80mL of 0.5mol / L sulfuric acid solution, heat to 90°C, stir on a 100r / min stirrer, after leaching for 30min, filter the leaching solution to obtain the leaching solution and adjust pH=4 with limestone to remove iron, filter the solution, and The solution was concentrated to 20 mL. Dilute 45mL P204 with 15mL sulfonated kerosene to prepare the extractant, then saponify with sodium hydroxide, the saponification rate is 40%, then add the extractant to the concentrated solution, stir on a 100r / min magnetic stirrer for 10min, then transfer the extract to Put it into a separatory funnel for phase separation, and the obtained organic phase is back-extracted with 1mol / L sulfuric acid to recover and separate manganese sulfate, and the recovery rate of manganese is measured to b...

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Abstract

The invention discloses a method for leaching, recovering and separating nickel from manganese-sulfur purification waste slag, which comprises the following steps: (1) crushing and sieving: crushing manganese-sulfur purification waste slag and then sieving; (2) leaching: manganese after sieving Sequentially add MnO to sulfur purification waste residue 2 , iron powder and dilute sulfuric acid solution, heated, stirred to dissolve, leached and filtered to obtain sulfur-containing filter cake and manganese-cobalt-nickel solution; (3) Fe impurity removal: add limestone to the manganese-cobalt-nickel filtrate to adjust the pH to obtain Fe(OH ) 3 Precipitate, filter, and take the filtrate; (4) Concentration: Concentrate the filtrate after removing impurities to obtain a concentrate; (5) Separation of manganese: Use P204 extractant to extract and separate the cobalt-nickel solution and manganese-loaded organic (6) Separation and recovery of nickel: the cobalt-nickel solution is extracted with P507 extractant to separate the organic phase loaded with cobalt, and the remaining phase is nickel sulfate solution. The process of the invention is simple and easy, can realize rapid leaching of manganese and nickel, and can control the generation of hydrogen sulfide.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery of electrolytic manganese and sulfur-containing waste residues, and in particular relates to a method for leaching, recovering and separating nickel from manganese and sulfur purification waste residues. Background technique [0002] Cobalt and nickel are associated metals of manganese ore in southern my country. At present, most of the raw materials used by electrolytic manganese production enterprises in Guangxi are low-grade manganese oxide ore. Mn, Ni, Co and S, etc. Although the content of cobalt and nickel is not high, it is higher than that in natural cobalt-nickel minerals. Guangxi electrolytic manganese production enterprises produce about 10,000 tons of manganese-sulfur purification waste slag every year. The manganese content in the slag is about 15%, the cobalt content is about 1.0%, and the nickel is about 0.8%. Therefore, cobalt is leached from manganese-sulfur purification wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B23/00
CPCC22B7/007C22B23/043C22B23/0461Y02P10/20
Inventor 谢雪珍叶有明覃荣谢雨寻农永萍廖政达蒋才云蓝峻峰郑文仪
Owner 广西下田锰矿有限责任公司
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