Method and application for removing arsenic from black copper sludge

A black copper mud and arsenic removal technology, applied in the field of arsenic removal, can solve the problems of reducing equipment production capacity, endangering workers' health, affecting metal direct recovery rate and product quality, and achieving good benefits and low environmental pollution

Inactive Publication Date: 2018-05-18
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are toxic arsenic compounds in black copper sludge in copper smelting plants. It is difficult to eliminate arsenic compounds by conventional wet or tempering treatment techniques, resulting in the cyclic accumulation of arsenic in the smelting process, seriously affecting the direct recovery rate of metals and product quality, and reducing equipment production. capacity, endangering the health of workers

Method used

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  • Method and application for removing arsenic from black copper sludge
  • Method and application for removing arsenic from black copper sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment provides a method for removing arsenic from black copper mud, which mainly includes:

[0030] Mix the black copper mud and sodium carbonate at a mass ratio of 1:1.2, and roast the reaction for 2 hours at a temperature of 600° C. to obtain a roasted product;

[0031] The roasted product and water were mixed at a solid-to-liquid ratio of 1g:5mL, reacted at a temperature of 75°C for 3.5 hours, and filtered to separate the solid and liquid to obtain arsenic-removed residue and arsenic-removed liquid.

[0032] Among them, the arsenic removal liquid contains: As 27.00g / L, Pb 0.52g / L, Bi 0.03g / L; the arsenic removal residue contains: Cu70.65%, As 0.64%, Pb 3.25%, Ni 1.68%, Sb 1.18%, Bi 0.35%. The dissolution rate of As was 97.81%, the recovery rate of Pb was 85.12%, Cu, Ni, Sb all entered into the arsenic removal residue.

[0033] Use a vacuum rotary evaporator to evaporate and concentrate the arsenic-removing liquid, and crystallize for the first time...

Embodiment 2

[0036] The present embodiment provides a method for removing arsenic from black copper mud, which mainly includes:

[0037] Mix black copper mud and sodium carbonate at a mass ratio of 1:0.9, and roast at a temperature of 650°C for 1 hour to obtain a roasted product; wherein, the material composition of black copper mud is: Cu 44.33wt%, As 21.59wt %, Pb 2.71wt%, Ni 1.09wt%, Sb 0.83wt%, Bi 0.37wt%.

[0038] The calcined product was pulverized and ground to 70 mesh. Mix the calcined product with a solid-to-liquid ratio of 1g:3mL and water, react at a temperature of 75°C for 2 hours, with a stirring intensity of 200rpm, and filter to separate the solid and liquid to obtain arsenic-removing slag and arsenic-removing liquid.

[0039] Among them, the arsenic removal solution contains: As 27.86g / L, Pb 0.43g / L, Bi 0.02g / L; the arsenic removal residue contains: Cu72.42%, As 0.63%, Pb 3.72%, Ni 1.45%, Sb 1.28%, Bi 0.65%. The dissolution rate of As is 98.01%, the recovery rate of Pb i...

Embodiment 3

[0043] The present embodiment provides a method for removing arsenic from black copper mud, which mainly includes:

[0044]Mix the black copper mud and sodium carbonate at a mass ratio of 1:1.2, and roast the reaction at a temperature of 650°C for 2 hours to obtain a roasted product; wherein, the material composition of the black copper mud is: Cu 44.33wt%, As 21.59wt% %, Pb 2.71wt%, Ni 1.09wt%, Sb 0.83wt%, Bi 0.37wt%.

[0045] The roasted product was pulverized and ground to 80 mesh. Mix the roasted product with a solid-to-liquid ratio of 1g:8mL and water, react at a temperature of 80°C for 2 hours, and stir at 250rpm, and filter to separate the solid and liquid to obtain arsenic-removing slag and arsenic-removing liquid.

[0046] Among them, the arsenic removal solution contains: As 28.00g / L, Pb 0.50g / L, Bi 0.04g / L; the arsenic removal residue contains: Cu72.05%, As 0.74%, Pb 3.89%, Ni 1.82%, Sb 1.39%, Bi 0.57%. The dissolution rate of As was 98.53%, the recovery rate of ...

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Abstract

The invention provides a method and application for removing arsenic from black copper sludge, and relates to the technical field of arsenic removal. The method for removing the arsenic from the blackcopper sludge comprises the steps that the black copper sludge and alkali are mixed and roasted; and after a roasted product and water are mixed, infiltrated and filtered, arsenic removal liquid is subjected to fractional crystallization to obtain a sodium arsenate product and alkali. The method is easy and convenient to operate and high in controllability, alkali can be cyclically utilized, resource regeneration is achieved, and environment protection and high efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of arsenic removal, and in particular to a method and application for removing arsenic from black copper mud. Background technique [0002] In the process of copper electrolytic refining, as the electrolysis process proceeds, the composition of the electrolyte changes at any time, the concentration of copper ions continues to rise, impurities also accumulate in it, and the concentration of sulfuric acid gradually decreases. In order to maintain the copper, acid content and impurity concentration in the electrolyte within the specified range, the electrolyte must be purified and adjusted to ensure the normal progress of the electrolysis process and the quality of the cathode copper. During electrodeposition decopper removal, impurities such as As, Sb, and Bi in the copper electrolyte will be precipitated at the cathode together with Cu, and the mud (containing Cu, As, Ni, Sb, Bi) produced on the cathode , Pb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B1/02C01G28/02C22B30/04
CPCC01G28/023C22B1/02C22B7/001C22B7/006C22B30/04Y02P10/20
Inventor 王文祥王晓阳方红生李慧颖莫越坚
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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