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Improved method for treatment technology for secondary cobalt-nickel leaching residues

A treatment process and leaching slag technology, which is applied in the improvement field of the secondary cobalt-nickel leaching slag treatment process, can solve the problems of high labor intensity, low metal recovery rate, and high transportation costs, so as to improve the operating conditions of employees and shorten the process flow , The effect of reducing processing costs

Inactive Publication Date: 2018-02-16
南丹县南方有色金属有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following disadvantages: 1. The recovery process is long and the recovery cost is high; 2. The slag transported by the car is easy to cause leaking, dripping and leaking, and the transportation cost is high; 3. The labor intensity of the workers is high; 4. The metal recovery rate is low

Method used

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  • Improved method for treatment technology for secondary cobalt-nickel leaching residues

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Embodiment 1

[0023] An improved method for secondary cobalt-nickel leaching slag treatment process, characterized in that: comprising the following steps:

[0024] (1) Pressure filtration: the secondary cobalt-nickel leaching residue is pumped into the filter press for pressure filtration, and the filter residue is taken for subsequent use;

[0025] (2) Slurry: take the filter residue described in step (1) and the zinc oxide leachate in the ratio of 5:1 by the liquid-solid ratio to carry out slurry, and the stirring speed is 70r / min under the condition of slurry for 30min, to obtain Slurry;

[0026] (3) Leaching: pump the slurry described in step (2) to zinc oxide high-acid leaching tanks, and add 10m 3 Slurry liquid, then add zinc electrolytic waste liquid and sulfuric acid, the acid content of zinc electrolytic waste zinc electrolytic liquid is controlled at 150g / L, leaching for 6h under the condition of liquid-solid ratio of 5:1 and temperature of 80°C, Control the initial acidity in ...

Embodiment 2

[0033] An improved method for secondary cobalt-nickel leaching slag treatment process, characterized in that: comprising the following steps:

[0034] (1) Pressure filtration: the secondary cobalt-nickel leaching residue is pumped into the filter press for pressure filtration, and the filter residue is taken for subsequent use;

[0035] (2) Slurry: take the filter residue described in step (1) and zinc oxide leachate in the ratio of 5.2:1 by liquid-solid ratio to carry out slurry, and the stirring speed is 110r / min under the condition of slurry for 30min, to obtain Slurry;

[0036] (3) Leaching: pump the slurry described in step (2) to zinc oxide high-acid leaching tanks, and add 10m 3 Slurry liquid, then add zinc electrolysis waste liquid and sulfuric acid, the acid content of zinc electrolyte waste zinc electrolysis liquid is controlled at 160g / L, leaching for 6.5h under the conditions of liquid-solid ratio of 5.5:1 and temperature of 85°C , the initial acid in the leachin...

Embodiment 3

[0043] An improved method for secondary cobalt-nickel leaching slag treatment process, characterized in that: comprising the following steps:

[0044] (1) Pressure filtration: the secondary cobalt-nickel leaching residue is pumped into the filter press for pressure filtration, and the filter residue is taken for subsequent use;

[0045] (2) Slurry: take the filter residue described in step (1) and zinc oxide leachate in the ratio of 5.6:1 by liquid-solid ratio to carry out slurry, and the stirring speed is 100r / min under the condition of slurry for 30min, to obtain Slurry;

[0046] (3) Leaching: pump the slurry described in step (2) to zinc oxide high-acid leaching tanks, and add 10m 3Slurry solution, then add zinc electrolysis waste liquid and sulfuric acid, wherein the acid content of the zinc electrolyte waste zinc electrolysis liquid is controlled at 165g / L, when the acid content of the zinc electrolysis waste liquid is 180g / L, no need to add sulfuric acid; Leach for 7.5...

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Abstract

The invention discloses an improved method for a treatment technology for secondary cobalt-nickel leaching residues. The method comprises the following steps of (1) carrying out filter pressing, specifically, pumping the secondary cobalt-nickel leaching residues into a filter press to be subjected to filter pressing, and taking the filter residues for later use; (2) carrying out slurrying; (3) carrying out leaching, specifically, pumping slurry to zinc oxide high-acid leaching tanks, adding 10m3 of the slurry into each tank, then adding spent zinc electrolytes and sulfuric acid, carrying out leaching for 6-8 hours under the conditions that the liquid-solid ratio is 5-6:1 and the temperature is 80-90 DEG C, controlling the initial acid concentration in the leaching process to be 150-180g / Land the final acid concentration to be 80g / L, and finally, carrying out filtration treatment on all materials so as to obtain leaching liquor and leaching residues; and (4) carrying out recycling, specifically, returning the leaching liquor to a zinc system to recycle zinc and cadmium and returning the leaching residues to a lead system to recycle lead and silver. The method has the advantages that the leaching rate of the zinc and the cadmium can be increased, the recovery rate of the zinc and the cadmium can be increased, the production cost can be lowered, and the labor intensity can be reduced.

Description

【Technical field】 [0001] The invention belongs to the field of zinc hydrometallurgy production, and in particular relates to an improved method for treating secondary cobalt-nickel leaching slag. 【Background technique】 [0002] The cobalt and nickel removal slag produced in the conventional zinc hydrometallurgy purification process has a relatively high zinc content. Generally, secondary leaching is performed to recover part of the zinc. During the process, secondary cobalt and nickel leaching slag with high zinc content will be produced. This part After the leached slag is filtered, it is usually transported to a rotary kiln by car for fire treatment to recover zinc, cadmium and other metals in the leached slag. The secondary cobalt-nickel leaching slag is treated by fire method. The commonly used treatment process is to make the zinc, cadmium and other metal ions in the secondary cobalt-nickel leaching slag be reduced to metal by carbon monoxide at a high temperature of 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/30C22B19/20C22B17/00C22B13/00C22B11/00C25C1/16
CPCC22B7/007C22B11/044C22B13/045C22B17/04C22B19/22C22B19/30C25C1/16Y02P10/20
Inventor 楚立军莫毅韦振仁唐仲开
Owner 南丹县南方有色金属有限责任公司
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