湿法处理氧化铋渣分离铋的研究

采用氯化浸出—水解沉锑—中和沉铋工艺流程从火法处理铜铅阳极泥过程中产出的氧化铋渣中分离铋。研究了终酸浓度、浸出时间、浸出液固比、浸出温度等对铋浸出率的影响;水解方式、pH和水解时间对锑水解率的影响;以及pH、中和时间对铋沉淀率的影响。在适当的工艺条件下,铋浸出率可以达到95.25%,锑水解率可达83.77%,铋沉淀率可达99%以上,同时可以回收锑、铜等有价金属。     

从钴渣中浸出钴、锌、镉试验研究

研究了采用水洗—焙烧—还原酸浸工艺从A药剂钴渣中高效回收钴等有价金属,考察了焙烧温度、浸出时间、浸出温度、硫酸浓度、还原剂用量等对有价金属浸出率的影响。结果表明:钴渣在液固体积质量比5/1、常温下搅拌水洗1 h,然后在500℃下焙烧2 h,最后在80℃下用质量浓度80 g/L硫酸、10 g/L亚硫酸钠浸出1 h,钴浸出率在90%以上,锌浸出率在96%以上,镉浸出率大于99%,浸出液中的有价金属可高效回收。     

硫化铅还原硫酸浸出锌电解阳极泥中二氧化锰的试验研究

对株冶电解锌阳极泥开展了用PbS做还原剂硫酸还原浸出二氧化锰的试验研究,纯PbS矿物样还原浸出试验考察了PbS颗粒细度、PbS与MnO2摩尔比、硫酸与MnO2摩尔比、浸出反应温度、浸出反应时间等因素对锰浸出率的影响,试验结果表明,PbS颗粒越细,与MnO2接触的表面积就越大,锰浸出速度就越快;PbS与MnO2摩尔比、硫酸与MnO2摩尔比、浸出反应温度、浸出反应时间等对锰的浸出速度有很大影响,在采用0．037-0．074mm的纯PbS条件下,试验获得的最佳浸出条件是PbS：MnO2摩尔比〉0．5,H2SO4：MnO2摩尔比3,浸出反应温度90℃,时间2h．在较佳条件下用0．037-0．074mm纯方铅矿样做还原剂可获得锰浸出率85％以上的试验指标,在同样条件下用实际硫化铅浮选精矿样做还原剂可获得锰浸出率93％以上的试验指标．实际PbS浮选精矿样还原浸出试验表明ZnS和FeS2等其它硫化矿物对二氧化锰存在协同还原浸出作用,协同还原浸出作用造成浸出液含杂升高,浸出渣中铅含量降低．因此,如果需要利用含Mn^2＋浸出液制备高纯的锰产品,同时为了便于浸出渣配料入炉冶炼,宜采用品位较高的PbS浮选精矿样做还原剂．     

高磷锰矿浸取除磷的实验研究

采用某高磷锰矿为原料,以硫酸浸出,通过考察矿浆浓度、反应温度、浸出时间、搅拌速度、酸浓度对矿石中锰和磷的浸出效果,提出了浸取过程中抑制高磷矿石磷浸出的最佳条件;并讨论了浸出液中除杂的工艺条件.实验得到的最佳浸出工艺为：在60℃矿浆浓度为40 g/L的0.5 mol/L的硫酸中,调节转速为50～100 r/min,浸出时间持续45～60 min左右,矿石中锰的浸出率可以达到95%以上.结果表明,在浸出后期通过调节溶液pH,可以降低浸出浆中的磷,脱磷率可以达99%以上.     

加压浸出-萃取法从钼钴废催化剂中回收钼

采用加压浸出从钼钴废催化剂中分离钼，在原料摩尔比Na2CO3／Mo=1．3，浸出温度150℃的条件下，钼的浸出率达90％。浸出液经酸化处理后采用N搿萃取回收，在有机相为20％N225-10％异辛醇-煤油的条件下，经4级萃取钼的萃取率可达到99．6％。反萃液经酸沉回收钼，产品钼酸铵质量较好。本工艺流程简单、有价金属回收率高、对环境友好。     

硫化铅还原硫酸浸出锌电解阳极泥中二氧化锰的试验研究

对株冶电解锌阳极泥开展了用PbS做还原剂硫酸还原浸出二氧化锰的试验研究,纯PbS矿物样还原浸出试验考察了PbS颗粒细度、PbS与MnO2摩尔比、硫酸与MnO2摩尔比、浸出反应温度、浸出反应时间等因素对锰浸出率的影响,试验结果表明,PbS颗粒越细,其与MnO2接触的表面积就越大,锰浸出速度就越快;PbS与MnO2摩尔比、硫酸与MnO2摩尔比、浸出反应温度、浸出反应时间等对锰的浸出速度有很大影响,在采用0．037～0．074mm的纯PbS条件下,试验获得的最佳浸出条件是PbS：MnO2摩尔比〉0．5,H2SO4：MnO2摩尔比3,浸出反应温度90℃,时问2h。在较佳条件下用0．037-0．074mm纯方铅矿样做还原剂可获得锰浸出率85％以上的试验指标,在同样条件下用实际硫化铅浮选精矿样做还原剂可获得锰浸出率93％以上的试验指标。实际PbS浮选精矿样还原浸出试验表明ZnS和Fes2等其它硫化矿物对二氧化锰存在协同还原浸出作用,协同还原浸出作用造成浸出液含杂升高,浸出渣中铅含量降低。因此,如果需要利用含Mn^2＋浸出液制备高纯的锰产品,同时为了便于浸出渣配料人炉冶炼,宜采用品位较高的PbS浮选精矿样做还原剂。     

从刚果(金)铜钴氧化矿提取钴的试验研究

针对刚果(金)铜钴矿铜高、硅高、钴低、以氧化矿为主的特点,开展了还原浸出钴的试验研究,考察了粒度、时间、pH值、还原剂用量以及还原剂种类等对钴浸出率的影响.研究显示,在浸出液固比4∶1、控制终点pH值1.5、还原剂用量为Co理论量的1.5倍、浸出温度80℃、矿样粒度-0.074mm占90％的条件下浸出120min,Co的平均浸出率为90％,平均酸耗为156.07kg/t.     

从铜渣中加压酸浸铜的试验研究

针对铜渣的物相组成，研究了加压酸浸有价金属，考察了铜渣粒度、搅拌速度、温度、时间、氧气体积分数、浸出剂硫酸质量浓度、液固体积质量比对有价金属浸出率的影响。通过试验，确定了最佳工艺参数：浸出温度80℃，液固体积质量比4．5∶1，浸出剂硫酸质量浓度105 g/L ，m（铜）∶ m（酸）＝1∶1．74，氧气体积分数≥30％，氧气压力0．2 M Pa ，浸出时间4 h ，搅拌速度500 r/min。最佳条件下，有价金属浸出率分别为：铜≥92％，镉≥99％，锌≥46％，锗≥70％，铟≥70％；铅100％、银≥97％留在浸出渣中。     

还原剂对菱锰矿锰浸取率的影响研究

研究了3种还原剂（葡萄糖、双氧水及它们的混合物）及在还原剂下温度对菱锰矿中锰浸取率的影响。结果表明在浸取过程中，加入少量还原剂不仅能提高浸取率，还能降低反应温度和节能。在40℃，用3mL浓硫酸浸取4g菱锰矿粉时，添加0.33g葡萄糖和1.5mL双氧水，反应60min，锰浸取率达到98．33％。     

含铅多金属废料加压浸出铜锌工艺研究

针对复杂含铅多金属废料,采用加压酸浸的工艺对物料进行处理,获得含铜、锌等有价金属的浸出液。通过实验研究获得最佳的浸出条件为初始硫酸质量浓度120 g/L、浸出温度100℃、浸出时间2.0 h、液固比4∶1,最佳条件下铜和锌的浸出率均可达到95%左右而铅的浸出率小于2%。     

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.