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李洪文 《有色冶金设计与研究》2019,(4)
为避免湿法炼铜系统的酸和铁富集,紫金山金铜矿现开路部分低铜萃余液采用石灰一段中和达标外排处理。该工艺药剂成本高,占废水处理总成本的60%以上。为此,该矿开展低铜萃余液两段中和中试试验,结果表明:Ⅰ段采用石灰石中和至pH值为3.0左右时,废水的自由酸和总铁的去除率达97%以上,Ⅱ段采用石灰中和至pH值为7.0左右时,上清液总铜、总锌和总砷等污染物含量均能达到《污水综合排放标准》(GB8978-1996)一级排放标准要求,且两段中和药剂成本较一段石灰中和的药剂成本降低了25.57%,两段中和的渣率也较一段石灰中和的渣率降低了6.58%。两段中和工艺的经济指标明显优于现采用的一段石灰中和工艺。 相似文献
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紫金山铜矿低品位矿石采用生物堆浸—萃取—电积工艺产出阴极铜。矿石中主要铜矿物为蓝辉铜矿及铜蓝,同时含有较高含量的黄铁矿,耗酸脉石含量低。铜矿物浸出过程中,伴随着黄铁矿的氧化产酸产铁,造成堆浸系统溶液中酸铁浓度的不断累积,影响到浸出、萃取及环保处理工序,需要通过不断地中和来降低酸铁浓度。介绍了紫金山铜矿生物堆浸的技术特点,对生物堆浸过程中高酸高铁和低酸低铁两种工艺实践中酸铁平衡实践进行总结;结合紫金山铜矿矿石矿物学信息,进行酸平衡计算,确定了堆浸过程中黄铁矿氧化过程对酸铁平衡的影响;分析工艺条件对酸铁平衡的影响,并提出未来解决酸铁过剩的工艺优化方向。 相似文献
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低品位硫化铜矿湿法提铜系统产生大量萃余液,酸浓度和铁含量高,有价金属铜、锌、铝含量低。不同pH区间金属中和沉淀行为存在差异,采用pH控制可实现大量的铁与其他有价金属分离的目的。金属硫化物的溶度积存在差异,通过硫化法串联靶向回收铜、锌;铝可通过中和法回收。串联靶向回收工艺可实现萃余液中多种有价金属的资源化回收利用,铜、锌、铝综合回收率分别为78.8%、76.7%、74.3%,处理后液可达到《铜、镍、钴工业污染物排放标准》(GB 25467—2010)的要求。 相似文献
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吴健辉 《有色金属(冶炼部分)》2015,(2):1-4
对紫金山低品位铜矿进行生物堆浸模拟试验。结果表明,起始喷淋液全铁浓度4.0g/L、矿石粒度-10mm,浸出周期为181天时,铜浸出率达到80%以上。片碱调节喷淋液pH沉矾除铁,采用不同喷淋制度抑制酸铁浸出是低品位铜矿生物堆浸未来重要研究方向。 相似文献
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铜再生灰浸出液中含有Cu、Zn、Fe、Cd等多种有价金属。采用“Lix984+磺化煤油”有机相从铜再生灰浸出液中萃取分离铜,并采用中和除铁法对萃余液中的铁沉淀分离。探究了萃取级数、萃取相比O/A、萃取剂浓度、水相初始pH、萃取时间对Cu2+与其它金属离子萃取分离的影响,以及溶液pH、反应温度、反应时间对萃铜余液除铁过程的影响。萃铜试验优化条件为:萃取级数2级、萃取相比3:4、萃取剂浓度15%、萃取时间2 min、萃取初始水相pH=1.5。除铁试验最佳参数为:中和终点pH=4.0、反应温度40℃、陈化时间1 h。在最佳条件下,Cu的萃取率为99.12%,与Zn、Cd、Fe的分离系数分别为1 317.9、1 178.7和651,实现Cu与其它金属的有效分离。萃铜余液除铁率达99.67%,除铁后液满足锌电解液对Fe浓度的要求。 相似文献
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<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
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正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
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《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
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《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
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正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
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正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献