Method of dearsenic by parallel circulating continuous electric formation

A technology of arsenic removal and electrowinning, which can be used in photography technology, instruments, photography auxiliary technology, etc., and can solve the problems of difficult control, large equipment investment, and high control accuracy.

Active Publication Date: 2005-01-05
YUNNAN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, their equipment investment is very large; and the control of parameters suc

Method used

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  • Method of dearsenic by parallel circulating continuous electric formation
  • Method of dearsenic by parallel circulating continuous electric formation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: The supplement liquid contains: Cu=31.51g / L, As=19.94g / L, Cu:As=1.580:1. Supply fluid flow rate 4.2m 3 / h. The circulating fluid temperature is 63°C. There are 24 electrowinning arsenic removal tanks. Arsenic removal current 10.0KA. The composition of end point solution Cu=0.97g / L, As=1.86g / L. The composition of arsenic slag is Cu=38.40%, As=19.85, and the ratio of copper to arsenic is Cu:As=1.935:1.

Embodiment 2

[0037] Example 2: The replenishment liquid contains: Cu=23.37g / L, As=13.18g / L, Cu:As=1.773:1. Supply fluid flow rate 4.2m 3 / h. The circulating fluid temperature is 62°C. There are 24 electrowinning arsenic removal tanks. The arsenic removal current is 9.0KA. The composition of end point solution Cu=1.48g / L, As=1.39g / L. The composition of arsenic slag is Cu=33.61%, As=18.22%, and the ratio of copper to arsenic is Cu:As=1.845:1.

Embodiment 3

[0038] Example 3: The replenishment liquid contains: Cu=22.03g / L, As=12.54g / L, Cu:As=1.757:1. Supply fluid flow rate 4.0m 3 / h. The circulating fluid temperature is 62°C. There are 24 electrowinning arsenic removal tanks. The arsenic removal current is 9.0KA. The composition of end point solution Cu=1.09g / L, As=1.28g / L. The composition of arsenic slag is Cu=32.10%, As=17.01%, and the ratio of copper to arsenic is Cu:As=1.887:1.

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Abstract

The invention is a parallel circulating continuous electrodeposition arsenic-removing method, where the electrolyte flows between electrowinning arsenic-removing tanks in parallel circulating form, heating circulating liquor, controlling the temperature at 60-66 deg.C, and completely supplying liquor in the electrodeposition arsenic-removing course, where the flow rate of supply liquor is equal to that of discharge liquor and controlled at 1-20 cu m/h, and the ratio of Cu to As in the supply liquor = 1.5-3 : 1-1.5; and partial electrobaths act as terminal tank, the Cu-ion concentration in the discharge liquor of the terminal tank is controlled at Cu2+ = 0.5-2.5g/L, and it controls the supply liquor, circulating liquor and terminal discharge liquor to make As and Cu form As-Cu alloys Cu2As and Cu3As in the arsenic-removing course, and it produces Cu2As as far as possible.

Description

technical field [0001] The invention relates to a technology for removing arsenic in a solution in a hydrometallurgical process, in particular to a parallel cycle continuous electrodeposition arsenic removal method for removing arsenic in an electrolytic solution of copper during electrolysis. Background technique [0002] In copper electrolytic production, most of the purification and removal of arsenic in the electrolyte is by electrowinning. There are mainly the following methods: dead-off method, two-stage arsenic removal method, cycle reverse current electrodeposition arsenic removal method, limiting current density electrodeposition arsenic removal method, induced arsenic removal method, control cathode potential electrodeposition arsenic removal method, etc. [0003] The first two arsenic removal methods have low arsenic removal efficiency, mostly below 50%; and accompanied by a large amount of AsH 3 Highly toxic gas is produced, and the power consumption is large, a...

Claims

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Application Information

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IPC IPC(8): C22B3/20C25C1/12
CPCY02P10/20
Inventor 丁昆华宏全黄善富黄太祥解建启史兴华
Owner YUNNAN COPPER CO LTD
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