从中浸渣中氧压酸浸锌、铁的试验研究

研究了从湿法炼锌中浸渣中氧压酸浸锌和铁,考察了氧压、中浸渣粒度、硫酸质量浓度、浸出时间、浸出温度、液固体积质量比、木质素磺酸钠加入量对锌、铁浸出率的影响.结果表明:在液固体积质量3∶1、始酸质量浓度140～150 g/L、浸出温度(150±5)℃、氧气压力0.8MPa、浸出时间80～90 min、木质素磺酸钠用量为渣量的0.15％的最佳条件下,锌浸出率达98％,铁浸出率为60.87％;降低浸出液终酸质量浓度及提高浸出温度可以使铁有效形成沉淀,抑制其浸出.     

铜阳极泥氧压酸浸预处理工艺研究

研究某铜阳极泥氧压酸浸工艺条件,考察硫酸初始浓度、温度、时间、液固比、压力等对金属浸出的影响。结果表明,当控制浸出硫酸初始浓度130~150g/L、温度155~165℃、时间6~8h、液固比5∶1、压力1.0~1.5MPa时,酸浸渣率为55%~60%,碲浸出率为85%~90%,镍、铜浸出率均在99%以上。     

高铁低品位硫化铅锌混合精矿氧压酸浸试验研究

研究了硫化铅锌混合精矿的氧压酸浸。试验结果表明:对100g混合精矿,在液固体积质量比3∶1、温度160~165℃、浸出时间80 min、混合气体压力0.8 MPa、搅拌速度750r/min、浸出剂硫酸质量浓度150g/L、木质素磺酸钠用量为矿石质量的0.05%、Zn2+质量浓度40~80g/L条件下,锌浸出率大于95%,铁浸出率小于10%,铅沉淀在渣中,较好地实现了锌、铁、铅的分离。     

高镉烟尘氧化酸浸试验

采用氧化酸浸法从高镉烟尘中高效浸出锌、镉,研究了过氧化氢用量、浸出温度、浸出时间、液固比及硫酸浓度对锌、镉浸出率的影响。结果表明,在硫酸浓度50 g/L、过氧化氢用量60 g/L、液固比3 mL/g、浸出温度80 ℃、浸出时间2.0 h的条件下,锌、镉浸出率分别可达93.50 %、95.97 %。     

多金属复杂铜矿常压氧浸工艺

在常压下以稀硫酸为浸出剂,工业氧(99%)为助浸剂,采用单因素试验法,研究了硫酸浓度、液固比、温度、氧气流量、反应时间对多金属复杂铜矿中的有价金属铜、铁、锌浸出效果的影响。结果表明：在H2SO4浓度1.00 mol/L、液固比12 mL/g、反应温度85 ℃、氧气流量0.3 L/min、反应时间8 h的较优条件下,铜、铁、锌的浸出率分别为99.97%、32.92%、64.79%,铅的浸出率很低。浸出渣主要由硫酸铅、闪锌矿、黄铁矿、方铅矿及元素硫等组成,并分析了锌和铁浸出率较低的原因。浸出液pH在0.5~0.6,有利于后续浸出液中铜的富集回收。     

某含多金属硫精矿焙烧—酸浸试验研究

针对某含多金属硫精矿性质,进行了焙烧—酸浸试验研究,考察了焙烧温度、酸浸硫酸用量、反应温度、液固比等因素对浸出效果的影响。结果表明:在焙烧温度600℃,酸浸反应温度80℃,液固比3. 0,终点pH=1. 0,浸出时间2. 0 h的最佳工艺条件下,获得了铜浸出率90. 65%,锌浸出率83. 87%,酸浸液质量浓度铜15. 9 g/L、锌7. 2 g/L,酸浸渣品位金29. 4 g/t、银277. 2 g/t、铁66. 58%的较好指标,为矿山工业生产提供技术支持。     

复杂铜钴合金酸浸-氧化酸浸工艺及动力学研究

针对难处理复杂铜钴合金不易浸出的问题,本文采用一段直接酸浸-二段氧化酸浸工艺进行了单因素试验,考察了各因素对钴、铜和铁的浸出率的影响,试验结果表明:一段浸出最佳工艺条件是硫酸浓度2 mol/L、反应温度85℃、搅拌转速200 r/min、固液比1:10 g/mL、反应时间105 min,二段浸出最佳工艺条件是反应温度8...     

赞比亚某氧化铜矿浸出试验研究

主要介绍了赞比亚某氧化铜矿使用硫酸进行浸出的情况。考察了氧化铜矿浸出过程中铜矿粒度、始酸浓度、液固体积质量比、浸出时间等因素对铜浸出率的影响,并对浸出各阶段的酸耗进行了研究,找到了该氧化铜的最佳浸出条件及酸耗指标,即在常温、常压的情况下,采用硫酸对磨矿细度-200目占40%的物料进行浸出,当浸出时间1h,浸出液固体积质量比3∶1,酸用量12g(始酸浓度40g/L)时,可使得该氧化铜矿的浸出率达97%以上,浸出硫酸单耗仅1.42t/t·Cu。     

云南某闪锌矿氧压酸浸工艺研究

针对云南省某复杂低品位闪锌矿进行氧压浸出试验研究。研究了始酸浓度、反应温度、高浸液和配矿情况对锌浸出率、浸出渣含锌的影响。结果表明,优化试验条件为液固比5∶1、添加剂用量为矿量的0.3%、反应温度130℃、反应时间90 min、氧压1.2 MPa、转速500 r/min、粒度-0.0469 mm （≥75%）、前液配入常压高浸液含Fe量（2～3） g/L,最终的锌浸出率达96.5%,终点酸度（20.0～26.0） g/L,铁浓度6 g/L,浸出渣中含锌小于1.7%。     

用盐酸从强磁铁尾矿中浸出铁及其动力学研究

研究了用盐酸从强磁铁尾矿中浸出铁，考察了温度、盐酸浓度、液固体积质量比和反应时间对铁浸出率的影响，探讨了浸出动力学。结果表明：在温度80℃、盐酸浓度8.8 mol/L、液固体积质量比7 mL/1 g、反应时间2 h最优条件下，铁浸出率可达94.37%;酸浸过程符合收缩未反应芯模型，受固相层扩散控制，表观反应活化能为23.55 kJ/mol;酸浸渣主要成分为石英与重晶石，可综合回收利用。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<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     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

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,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

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     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

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     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

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,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

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.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

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.