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Method for recycling valuable metal in manganese-rich slag

A valuable metal, manganese-rich slag technology, applied in the fields of chemical industry and hydrometallurgy, to achieve the effect of high recovery rate, lower production cost and shorten recovery process flow

Inactive Publication Date: 2011-11-16
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for recycling valuable metals in manganese-rich slag by using high-temperature recrystallization to shorten the recycling process, reduce production costs, and increase the value of metals in the existing processing methods. Metal recovery

Method used

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  • Method for recycling valuable metal in manganese-rich slag
  • Method for recycling valuable metal in manganese-rich slag

Examples

Experimental program
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Effect test

Embodiment 1

[0015] a leaching 1kg of manganese carbonate slag containing 5% nickel, cobalt, copper and zinc with 5kg 50g / L of sulfuric acid to obtain a sulfate solution containing nickel, cobalt, copper, zinc and manganese;

[0016] b. Crystallize the leached sulfate solution at 180°C for 10 minutes at a constant temperature;

[0017] c Filtrate at 180°C to obtain crystallization mother liquor containing nickel, cobalt, copper and zinc and manganese sulfate monohydrate crystals;

[0018] d Cool the manganese sulfate monohydrate crystals to 50°C to dissolve them by conventional methods, and filter to obtain pure manganese sulfate solution;

[0019] e Recrystallize the pure manganese sulfate solution at a constant temperature for 10 minutes at 180°C, filter and dry at 180°C to obtain manganese sulfate monohydrate crystals;

[0020] f Precipitate the crystalline mother liquor containing nickel, cobalt, copper, and zinc with 120g of sodium sulfide to obtain mixed precipitates of cobalt sulfi...

Embodiment 2

[0025] a Leach 5kg of manganese-rich slag containing 1% nickel and cobalt with 5kg250g / L of sulfuric acid to obtain a sulfate solution containing nickel, cobalt and manganese;

[0026] b. Crystallize the leached sulfate solution at a constant temperature of 250°C for 30 minutes;

[0027] c Filtration at 250°C to obtain crystallization mother liquor containing nickel and cobalt and anhydrous manganese sulfate crystals;

[0028] d Cool anhydrous manganese sulfate crystals to 20°C to dissolve them by conventional methods, and filter to obtain pure manganese sulfate solution;

[0029] e Recrystallize the pure manganese sulfate solution at a constant temperature for 30 minutes at 200°C, filter and dry at 200°C to obtain manganese sulfate monohydrate crystals;

[0030] f Precipitate the crystallization mother liquor containing nickel and cobalt with 330g of sodium sulfide to obtain the mixed sulfide precipitation of nickel and cobalt sulfide, and return the mixed sulfide precipitat...

Embodiment 3

[0035] a Leach 5 kg of manganese-rich slag containing 2% cobalt with 10 kg of 200 g / L sulfuric acid to obtain a sulfate solution containing cobalt and manganese;

[0036] b. Crystallize the leached sulfate solution at 200°C for 25 minutes at a constant temperature;

[0037] c Filtration at 200°C to obtain cobalt-containing crystallization mother liquor and mixture crystals containing manganese sulfate monohydrate and manganese sulfate anhydrous;

[0038] d Cool the mixed manganese sulfate crystals to 40°C to dissolve them, and filter to obtain pure manganese sulfate solution

[0039] e Recrystallize the pure manganese sulfate solution at 195°C for 25 minutes at a constant temperature, then filter and dry at 195°C to obtain manganese sulfate monohydrate crystals;

[0040] f Precipitate the cobalt-containing crystallization mother liquor with 400g of sodium sulfide to obtain a cobalt sulfide precipitate, and return the cobalt sulfide precipitate to the cobalt sulfide ore for re...

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Abstract

The invention discloses a method for recycling a valuable metal in manganese-rich slag. The method comprises the following process steps of: a, leaching out the manganese-rich slag by using a sulfuric acid solution with a concentration of 50-250g / L according to a ratio of solid to liquid of 1:1-1:5, and converting into a sulfate solution; b, carrying out constant-temperature crystallization on the leached sulfate solution at 180-250 DEG C for 10-30min; c, filtering at 180-250 DEG C to obtain a crystallization master liquid and manganese sulfate crystals; d, cooling down the manganese sulfate crystals to 20-50 DEG C for dissolving, and filtering to obtain a pure manganese sulfate solution; e, carrying out constant-temperature recrystallization on the pure manganese sulfate solution at 180-200 DEG C for 10-30min, filtering at 180-200 DEG C and drying the crystals to obtain manganese sulfate monohydrate crystals; and f, settling the filtered crystallization master liquid in the step c by using sodium sulfide with 2-5 times of theoretical amount to obtain a sulfate sediment. According to the method disclosed by the invention, the valuable metal in the manganese-rich slag is recycled by using a high-temperature recrystallization method, the recycling rate of the valuable metal is high, and the recycled valuable metal can be recycling with a responsive crude ore, thus the recycling process flow of is shortened, and the production cost is reduced.

Description

technical field [0001] The invention relates to the fields of chemical industry and hydrometallurgy, in particular to a method for recycling valuable metals in manganese-rich slag. Background technique [0002] At present, when dealing with ores containing valuable metals such as nickel, cobalt, copper, zinc, manganese, etc., extraction methods are often used to extract valuable metals such as nickel, cobalt, and copper in the ore to produce related nickel, cobalt, and copper. Valuable metal products. During the extraction process, the separated zinc and manganese solutions (entraining some valuable metals such as nickel, cobalt, and copper) are precipitated with carbonate to form manganese-rich slag, and then the cobalt and copper are recovered by pyroprocessing. Zinc volatilizes in the process of fire recovery, and manganese is discarded by slag making. This method has the problems of low recovery rate of valuable metals, high energy consumption, serious environmental pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B3/08C22B3/20C22B47/00
CPCY02P10/20
Inventor 邓洪民
Owner JINCHUAN GROUP LIMITED
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