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A method of preparing copper powder from waste etchant
A method of preparing copper powder from waste etchant
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机译:一种由废蚀刻剂制备铜粉的方法
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摘要
PURPOSE: A method for recovering high purity copper powder of fine particles from waste etchant containing copper using electrolyzer is provided. CONSTITUTION: The method comprises a step (S10) of agitating waste etchant (-etchant); a step (S20) of adjusting concentration of copper contained in the waste etchant to 13.5 g/L; a step (S30) of injecting the waste etchant into electrolysis reaction container; a step (S40) of proceeding electrolysis collecting reaction as maintaining temperature inside the reaction container to 28 deg.C, pH to 8.6, current density to 6 A/cm¬2 and agitation speed of agitator to 150 rpm; a step (S50) of precipitating copper powder under the cathode by proceeding reaction so that electrolysis rate inside the reaction container is maintained to 1 g/h or more; a step (S60) of taking out and filtering the precipitates; and a step (S70) of drying the washed precipitates after washing the precipitates with water.
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机译:目的:提供一种使用电解器从含铜的废蚀刻剂中回收高纯度细颗粒铜粉的方法。组成:该方法包括搅拌废蚀刻剂(-蚀刻剂)的步骤(S10);将废蚀刻剂中所含的铜的浓度调整为13.5g / L的步骤(S20)。将废蚀刻剂注入到电解反应容器中的步骤(S30)。步骤S40,进行电解收集反应,将反应容器内的温度保持在28℃,pH保持在8.6,电流密度保持在6A / cm 2,搅拌器的搅拌速度保持在150rpm。通过进行反应使阴极下方的铜粉析出而将反应容器内的电解速度维持在1g / h以上的工序(S50)。将沉淀物取出并过滤的步骤(S60);在用水洗涤沉淀物之后,干燥洗涤的沉淀物的步骤(S70)。
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