A method for removing bismuth, arsenic and antimony from copper electrolyte

A copper electrolyte and electrolyte technology, applied in the field of arsenic, antimony, and bismuth removal from copper electrolyte, can solve the problems of copper loss in electrolytic system, substandard copper quality, easy to produce highly toxic arsenic hydrogen gas, etc. The effect of good impurity removal effect and high efficiency impurity removal ability

Active Publication Date: 2020-05-08
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the electrowinning method can open the arsenic, antimony and bismuth out of the electrolytic system, black copper contains more than 60% copper, resulting in the loss of copper in the electrolytic system
Moreover, there are many problems in the electrowinning process, such as complex technical conditions, high energy consumption, and easy production of highly toxic arsine gas.
In addition, bismuth is preferentially deposited over arsenic and antimony in the electrowinning process, especially when the bismuth content in the electrolyte reaches 0.6 g / L. The quality of electric copper is not up to standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The arsenic, antimony, and bismuth concentrations in the slag-containing copper electrolyte to be treated were 17.5, 0.21, and 0.73 g / L, respectively, and the treatment volume per cycle was 4 L. Prepare titanium-antimony mixture with metatitanic acid and antimony acid. The molar amount of antimony in the titanium-antimony mixture is 5 times that of bismuth in the electrolyte containing miscellaneous copper. 1.3 times the molar weight. Mix the titanium-antimony mixture with the hydrogen peroxide solution for activation treatment, the amount of hydrogen peroxide is 3 times the total molar amount of titanium and antimony in the titanium-antimony mixture, the reaction temperature of the activation treatment is 70 ℃, and stir for 60 minutes to obtain the active impurity remover slurry. Put the active impurity remover into 4 L of copper electrolyte, stir and react at 100 °C for 0.5 hour, filter to obtain the purified solution and arsenic, antimony, bismuth and titanium slag,...

Embodiment 2

[0024] The concentrations of arsenic, antimony and bismuth in the slag-containing copper electrolyte to be treated were 39.5, 0.19 and 0.47 g / L, respectively. Prepare a titanium-antimony mixture with titanium sulfate and sodium antimonate. The molar amount of antimony in the titanium-antimony mixture is 8 times that of bismuth in the electrolyte containing miscellaneous copper. 1.5 times the molar weight. Mix the titanium-antimony mixture with the hydrogen peroxide solution for activation treatment, the amount of hydrogen peroxide is 5 times the total molar amount of titanium and antimony in the titanium-antimony mixture, the reaction temperature of the activation treatment is 50 ℃, and stir for 20 minutes to obtain the active impurity remover slurry. Put the active impurity remover into 4 L of copper electrolyte, stir and react at 80 °C for 2 hours, filter to obtain the purified liquid and arsenic, antimony, bismuth and titanium slag, the removal rates of arsenic, antimony, ...

Embodiment 3

[0029] The concentrations of arsenic, antimony and bismuth in the slag-containing copper electrolyte to be treated were 5.5, 0.39 and 1.82 g / L, respectively. Prepare a titanium-antimony mixture with titanyl sulfate, potassium pyroantimonate and antimony oxychloride. The molar amount of antimony in the titanium-antimony mixture is 10 times the molar amount of bismuth in the copper-containing electrolyte, and the molar amount of titanium in the titanium-antimony mixture is 1 times the molar amount of arsenic in the mixed copper electrolyte. Mix the titanium-antimony mixture with the hydrogen peroxide solution for activation treatment, the amount of hydrogen peroxide is 5 times the total molar amount of titanium and antimony in the titanium-antimony mixture, the reaction temperature of the activation treatment is 95 ℃, and stir for 20 minutes to obtain an active impurity remover slurry. Put the active impurity remover into 4 L of copper electrolyte, stir and react at 60 °C for 4...

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Abstract

The invention discloses a method for removing bismuth, arsenic and stibonium from a copper electrolyte. According to the method, a titanium-stibonium mixture is converted into an active impurity removing agent in a hydrogen peroxide activating treatment manner, and arsenic, stibonium, bismuth and other impurities in the copper electrolyte are removed through coprecipitation. The method specifically comprises the steps that a titanium containing compound, a stibium containing compound or titanium-stibonium slag is prepared and mixed in proportion to obtain the titanium-stibonium mixture, then the titanium-stibonium mixture and a hydrogen peroxide solution are stirred and mixed for activating treatment operation, and the active impurity removing agent is obtained; and the active impurity removing agent and the impurity removing copper electrolyte are stirred and mixed for purification and impurity removal operation, and purified liquid and arsenic-stibonium-bismuth-titanium slag are obtained. The arsenic-stibonium-bismuth-titanium slag is subjected to chlorine salt bismuth removal operation, a bismuth containing acid chlorine salt solution and arsenic-stibonium-titanium slag are obtained; and the arsenic-stibonium-titanium slag is subjected to alkali liquor arsenic removal operation, and arsenic-alkali mixed liquid and titanium-stibonium slag are obtained. According to the method, on the premise of avoiding copper and nickel losses, arsenic, stibonium and bismuth in the copper electrolyte are efficiently removed, no poisonous gas is generated, and the impurity removing agentcan be used cyclically.

Description

technical field [0001] The invention relates to a solution purification and impurity removal method, in particular to a method for removing bismuth, arsenic and antimony from copper electrolyte. Background technique [0002] Arsenic, antimony and bismuth are common associated elements of copper minerals. Because its potential is similar to that of copper, it is easy to discharge and precipitate at the cathode at the same time as copper, and it is also easy to form floating anode slime to adhere to the cathode, making it the most harmful impurity element to the quality of electric copper. In order to avoid the harm of the above-mentioned impurities, on the one hand, it should be removed as much as possible in the copper pyrometallurgy, and the anode copper with high copper content should be used for electrolytic refining; on the other hand, it is necessary to strengthen the purification and filtration of the copper electrolyte, Maintain low concentrations of arsenic, antimon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/44C22B15/00C25C1/12C25C7/06
CPCC22B3/44C22B15/0089C25C1/12C25C7/06Y02P10/20
Inventor 聂华平曹才放徐志峰杨亮李金辉田磊
Owner JIANGXI UNIV OF SCI & TECH
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