Black copper sludge dearsenification device and method

A black copper slime and arsenic removal technology, applied in the chemical industry, can solve the problems of inability to effectively separate arsenic and other valuable metals, low metal recovery rate, low leaching rate, etc. Arsenic leaching rate, enhanced ion diffusion effect

Pending Publication Date: 2018-11-30
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the acid leaching process is used to remove arsenic from black copper mud, copper, arsenic, antimony, and bismuth will be leached together and the leaching rate is not high, and the effective separation of arsenic from other valuable metals cannot be achieved. What is more serious is to carry out acid leaching in black copper mud It will produce highly toxic arsine gas. From the perspective of economic and environmental benefits, the process has serious defects. When the black copper mud is removed by alkali leaching process, although the effective removal of arsenic and other valuable metals Separation, but it needs to add hydrogen peroxide or oxygen for oxygen pressure leaching at the same time as leaching, which has problems such as low metal recovery rate, high cost and difficult way out

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  • Black copper sludge dearsenification device and method

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Effect test

Embodiment 1

[0024] A method for removing arsenic from black copper mud, comprising the following steps: adding 33.78g of NaOH solid to reaction tank 1 for the first time, then adding 500ml of water to reaction tank 1 to completely dissolve NaOH solid, starting heating device 4 to heat NaOH solution to 80 At ~85°C, add 50g of black copper mud into the reaction tank 1, and at the same time, the air injection stirring device 5 injects air into the reaction tank with an air injection pressure of 3~5 MPa and stirs. Add 33.78g NaOH solid for the second time within 1, continue gas injection and stirring reaction under the magnetic field strength 1T for 2h, obtain leaching liquid and leaching slag, after chemical analysis of leaching liquid and leaching slag, it is detected that the leaching rate of arsenic reaches 92%, copper The enrichment rate reaches 62%, and the copper in the leaching slag is elemental copper powder.

Embodiment 2

[0026] A method for removing arsenic from black copper slime, comprising the following steps: adding 33.78g of NaOH solid to reaction tank 1 for the first time, then adding 500ml of water to reaction tank 1 to completely dissolve NaOH solid, starting heating device 4 to heat NaOH solution to 80 At ~85°C, add 50g of black copper mud into the reaction tank 1, and at the same time, the air injection stirring device 5 injects air into the reaction tank with an air injection pressure of 3~5 MPa and stirs. After reacting for 2 hours under a magnetic field strength of 2T, the Add 33.78g NaOH solid for the second time within 1, continue to inject gas and stir the reaction for 2h under the magnetic field strength 2T, and obtain the leaching solution and leaching residue. After chemical analysis of the leaching solution and leaching residue, it is detected that the leaching rate of arsenic reaches 95%. The enrichment rate reaches 71.6%, and the copper in the leaching slag is elemental co...

Embodiment 3

[0028] A method for removing arsenic from black copper slime, comprising the following steps: adding 33.78g of NaOH solid to reaction tank 1 for the first time, then adding 500ml of water to reaction tank 1 to completely dissolve NaOH solid, starting heating device 4 to heat NaOH solution to 80 At ~85°C, add 50g of black copper mud into the reaction tank 1, and at the same time, the air injection stirring device 5 injects air into the reaction tank with an air injection pressure of 3~5 MPa and stirs. Add 33.78g NaOH solid for the second time within 1, and continue to inject gas and stir the reaction for 2h under the magnetic field strength 3T to obtain the leaching solution and leaching residue. After chemical analysis of the leaching solution and leaching residue, it is detected that the leaching rate of arsenic reaches 96.4%. The enrichment rate reaches 80%, and the copper in the leaching slag is elemental copper powder.

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Abstract

The invention belongs to the technical field of chemical engineering, and relates to a black copper sludge dearsenification device and method. Black copper sludge oxidation alkaline leaching operationis carried out in manners of parallel magnetic field applying and air agitation collaborative coupling, in the air injection oxidation process, reaction liquid rotates in an eddy shape, the rotatingface of the reaction liquid is vertical to the magnetic field, a magnetic induction line is cut in the reaction liquid rotation stirring process, magnetic field gradient is borne in the vertical direction, lorentz force is borne in the horizontal direction, and the aims of strengthening ion diffusion, strengthening solution activity and the dissolved oxygen level, improving the oxidizing reactionefficiency, greatly improving the arsenic leaching efficiency, avoiding increase of copper, antimony and bismuth leaching and saving the production cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a device and method for removing arsenic from black copper sludge. Background technique [0002] The black copper slime produced by the purification of copper electrolyte contains a large amount of valuable metals such as Cu, As, Sb and Bi, but the process commonly used by copper smelting enterprises is to directly return the black copper slime to the smelting system to recover only the copper in it. As a result, impurities such as As, Sb, and Bi are not only caused a vicious cycle in the smelting system, failing to achieve the purpose of comprehensive utilization, but also affecting the smelting system and increasing the pressure on environmental protection. Among them, the harm of arsenic is the most prominent. Arsenic is a carcinogen that is toxic to the human body and other organisms, and constitutes the most important source of environmental pollution in the non-ferr...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B15/00C22B30/04
CPCC22B7/008C22B15/008C22B30/04Y02P10/20
Inventor 姚夏妍余江鸿鲁兴武李彦龙程亮李俞良李守荣张恩玉
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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