銅電解精煉過(guò)程中砷銻鉍雜質(zhì)分布及其脫除研究
發(fā)布時(shí)間：2019-01-12 14:46
【摘要】：金川銅電解陽(yáng)極板的原料成分日趨復(fù)雜,雜質(zhì)含量超標(biāo)給陰極銅的質(zhì)量帶來(lái)了危害,同時(shí)也給電解工藝控制和生產(chǎn)操作帶來(lái)了極大困難。因此有必要對(duì)銅電解液雜質(zhì)分布規(guī)律及工藝指標(biāo)控制進(jìn)行優(yōu)化研究,以提升電解工藝對(duì)陽(yáng)極板原料成分變化的適應(yīng)性。根據(jù)陽(yáng)極板原料特性,通過(guò)試驗(yàn)和試生產(chǎn),摸索出了適合實(shí)際生產(chǎn)的新型添加劑ADT,并將其成功應(yīng)用到了金川銅電解高電流密度生產(chǎn)中,電解液中懸浮物含量下降了1個(gè)數(shù)量級(jí),使公司形成了具有自主知識(shí)產(chǎn)權(quán)的銅電解添加劑核心技術(shù)。針對(duì)金川銅電解液的凈化工藝,在利用銅電解液深度脫銅凈化技術(shù)處理電解后液過(guò)程中,通過(guò)優(yōu)化與提升凈化系統(tǒng)真空蒸發(fā)器—水冷結(jié)晶機(jī)的工藝技術(shù)控制條件,使一次結(jié)晶母液中銅離子濃度從35g/L左右降到15g/L以下,粗硫酸銅產(chǎn)出量增加2948t/a。在誘導(dǎo)脫銅工序中通過(guò)調(diào)整主輔給液的方式,使As、Sb和Bi的脫除率分別比設(shè)計(jì)值增加1%、5%和5%,黑銅板(渣)的產(chǎn)出量減少1125t/a,銅的直收率提高0.04%。根據(jù)電解生產(chǎn)銅離子濃差極化原理,將旋流電解技術(shù)應(yīng)用到金川銅電解后液凈化工藝中,重點(diǎn)研究了銅離子濃度在電流密度400A/m2~900A/m2及特定工藝技術(shù)條件下,提取金屬銅及脫除砷、銻、鉍等雜質(zhì)的工藝技術(shù)條件控制思路,將原脫銅工藝進(jìn)入渣中的銅以標(biāo)準(zhǔn)陰極銅的形式提取出來(lái),在保證凈化脫雜效率的前提下生產(chǎn)出符合GB/T467-1997(CATH-2)國(guó)家標(biāo)準(zhǔn)要求的陰極銅產(chǎn)品,且一、二段電流效率達(dá)到95%以上。通過(guò)技術(shù)進(jìn)步,探索研究SF-11樹(shù)脂對(duì)雜質(zhì)Sb、Bi的選擇性脫除效果,試驗(yàn)其穿透點(diǎn)、反洗效果及再生性能,得出SF-11樹(shù)脂對(duì)Sb、Bi的脫除率可穩(wěn)定達(dá)到85%以上。在模擬我廠大板電解槽內(nèi)溶液的溫度(63℃)條件下,通過(guò)補(bǔ)加高砷溶液,試驗(yàn)得出電解液中的As、Sb、Bi等雜質(zhì)存在形成復(fù)合物從溶液中析出的共同效應(yīng),為銅電解凈化除雜工藝開(kāi)辟了新的思路。
[Abstract]:The raw material composition of Jinchuan copper electrolytic anode plate is becoming more and more complex, and the excessive impurity content brings harm to the quality of cathode copper, at the same time, it also brings great difficulties to the electrolysis process control and production operation. Therefore, it is necessary to optimize the distribution of impurities in copper electrolyte and the control of process index, so as to improve the adaptability of electrolytic process to the change of raw material composition of anode plate. According to the characteristics of anode plate, a new additive, ADT, which is suitable for practical production, has been found out by test and trial production and successfully applied to the high current density production of Jinchuan copper electrolysis. The content of suspended solids in electrolyte decreased by one order of magnitude, which made the company form the core technology of copper electrolysis additive with independent intellectual property. In view of the purification process of Jinchuan copper electrolyte, the technological control conditions of the vacuum evaporator and water-cooled crystallization machine in the purification system were optimized and promoted in the process of treating the post-electrolytic solution with the copper electrolyte deep decopper purification technology. The concentration of copper ion in primary crystallization mother liquor was decreased from about 35g/L to below 15g/L, and the output of crude copper sulfate increased by 2948 t / a. In the process of induced copper removal, the removal rate of As,Sb and Bi was increased by 1 / 5% and 5%, respectively, and the output of black copper (slag) was reduced by 1125t / a, and the direct yield of copper was increased by 0.04%. According to the principle of concentration polarization of copper ion produced by electrolysis, the swirl electrolysis technology was applied to the purification process of Jinchuan copper after electrolysis. The concentration of copper ion under the condition of current density 400A/m2~900A/m2 and specific technology was studied emphatically. The technological conditions for extracting metal copper and removing impurities such as arsenic, antimony, bismuth and so on are controlled. The copper from the original copper removal process into the slag is extracted in the form of standard cathode copper. The cathode copper products which meet the requirements of GB/T467-1997 (CATH-2) national standards are produced on the premise of purifying and removing impurity efficiency, and the current efficiency of the first and second stage is over 95%. Through the progress of technology, the selective removal effect of SF-11 resin on impurity Sb,Bi was studied. The penetration point, backwashing effect and regeneration performance of SF-11 resin were tested. It was concluded that the removal rate of Sb,Bi by SF-11 resin could reach more than 85%. Under the condition of simulating the temperature (63 鈩，
本文編號(hào)：2407896
[Abstract]:The raw material composition of Jinchuan copper electrolytic anode plate is becoming more and more complex, and the excessive impurity content brings harm to the quality of cathode copper, at the same time, it also brings great difficulties to the electrolysis process control and production operation. Therefore, it is necessary to optimize the distribution of impurities in copper electrolyte and the control of process index, so as to improve the adaptability of electrolytic process to the change of raw material composition of anode plate. According to the characteristics of anode plate, a new additive, ADT, which is suitable for practical production, has been found out by test and trial production and successfully applied to the high current density production of Jinchuan copper electrolysis. The content of suspended solids in electrolyte decreased by one order of magnitude, which made the company form the core technology of copper electrolysis additive with independent intellectual property. In view of the purification process of Jinchuan copper electrolyte, the technological control conditions of the vacuum evaporator and water-cooled crystallization machine in the purification system were optimized and promoted in the process of treating the post-electrolytic solution with the copper electrolyte deep decopper purification technology. The concentration of copper ion in primary crystallization mother liquor was decreased from about 35g/L to below 15g/L, and the output of crude copper sulfate increased by 2948 t / a. In the process of induced copper removal, the removal rate of As,Sb and Bi was increased by 1 / 5% and 5%, respectively, and the output of black copper (slag) was reduced by 1125t / a, and the direct yield of copper was increased by 0.04%. According to the principle of concentration polarization of copper ion produced by electrolysis, the swirl electrolysis technology was applied to the purification process of Jinchuan copper after electrolysis. The concentration of copper ion under the condition of current density 400A/m2~900A/m2 and specific technology was studied emphatically. The technological conditions for extracting metal copper and removing impurities such as arsenic, antimony, bismuth and so on are controlled. The copper from the original copper removal process into the slag is extracted in the form of standard cathode copper. The cathode copper products which meet the requirements of GB/T467-1997 (CATH-2) national standards are produced on the premise of purifying and removing impurity efficiency, and the current efficiency of the first and second stage is over 95%. Through the progress of technology, the selective removal effect of SF-11 resin on impurity Sb,Bi was studied. The penetration point, backwashing effect and regeneration performance of SF-11 resin were tested. It was concluded that the removal rate of Sb,Bi by SF-11 resin could reach more than 85%. Under the condition of simulating the temperature (63 鈩，
本文編號(hào)：2407896
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