新型硫化剂在钨钼分离中制备硫代钼酸盐的研究

首次选择一种比RCS更廉价的新型硫化剂R1CS代替RCS、NaHS、Na2S或H2S,考察了新型硫化剂R1CS在粗钨酸钠溶液中生成硫代钼酸钠的硫代化效果.结果表明这种硫化剂对含WO3:120.257g/L,Mo:1.457g/L的实际钨酸钠溶液控制R1CS的加入量为Mo的近10倍,在装有回流管的三颈瓶中于106℃搅拌反应2.5h,反应冷至室温后,用1:1的盐酸在密闭的容器中调节酸度至pH=8.0-8.4,在70℃磁力搅拌再反应2h,用3%N263单级萃取检查硫化效果,钼的萃取率可达96%以上,表明这种新型硫化剂R1CS能更方便、更经济地应用于NaOH浸出的粗钨酸钠溶液中的钼酸根的硫代化.     

新型硫化剂在钨钼分离中制备硫代钼酸盐的研究

首次选择一种比RCS更廉价的新型硫化剂R1CS代替RCS、NAHS、NA2S或H2S,考察了新型硫化剂R1CS在粗钨酸钠溶液中生成硫代钼酸钠的硫代化效果。结果表明这种硫化剂对含WO3：120.257g/L,Mo:1.457g/L的实际钨酸钠溶液控制R1CS的加入量为MO的近10倍,在装有回流管的三颈瓶中于106℃搅拌反应2.5h,反应冷至室温后,用1：1的盐酸在密闭的容器中调节酸度至PH=8.0-8.4,在70℃磁力搅拌再反应2h,用3%N263单级萃取检查硫化效果,钼的萃取率可达96%以上,表明这种新型硫化剂R1CS能更方便、更经济地应用于NAOH浸出的粗钨酸溶液中的钼酸根的硫代化。     

含钼的钨酸钠溶液中分离钼用的硫代钼酸盐制备方法

一种含钼的钨酸钠溶液中分离钼用的硫代钼酸盐制备方法。它是用含NaOH：0．5～20g/L：WO3：40～280g/L；Mo：0．2～3．5g／L的钨酸钠溶液作料液，按料液中含Mo总重量的7～15倍加入硫作硫化剂，于反应容器中搅拌混合。加热至40～110℃．反应1～4小时后，冷至40℃左右；再在密闭及搅拌情况下，用无机酸或有机酸调节混合液的pH值至7．5～9．0，然后，加热至50-80℃，搅拌，反应1_4小时。     

钨酸钠溶液Na2S除钼工艺的改进

研究了对钨酸钠体系采用三硫化钼沉淀法除钼的工艺,以及硫化、调酸过程对除钼的影响,改进了除钼方法.结果表明,该改进方法能处理含钼0.1～1.5 g/L的钨酸钠溶液,且具有除钼稳定、快速、钨损失较小等优点,所生产的APT可达到APT-0标准.     

从钨酸钠溶液中分离少量钼

本发明阐述了从含钼的钨酸钠溶液中以三硫化钼沉淀除钼的过程。用硫酸调整含钼钨酸钠溶液的 pH 值至8～5之间,加入至少     

新型硫化剂制备硫代钼酸盐研究

采用新型硫化剂ＲＳ代替Ｎａ２Ｓ和ＮａＨＳ,从钨酸盐溶液中制取硫代钼酸盐。较系统地研究了硫化过程的各工艺参数,结果表明料液起始碱度８ ～１６ ｇ／Ｌ,游离Ｓ２ － 离子浓度４ ｇ／Ｌ,硫化ｐＨ 值＜ ９时,钼的萃取率可达９５ ％ 以上。     

用溶剂萃取法从钨酸盐溶液中除钼

本发明用硫化法从含有价钨的水溶液中除掉钼。溶液的硫化程度应控制在能使钼全部转换成硫代钼酸盐。而钨则基本上很少转换成硫代钨酸盐。然后使形成的含硫代钼酸盐络合离子的溶液与适当数量的有机萃取剂接触一段时间使硫代钼酸盐络合离子进入有机萃取剂。所用有机萃取剂由芳香族有机溶剂和结构式为 R_3(CH_3)N~+A~-的委铵化合物组成 R_3(CH_3)N~+A~-中的 R 为含4～8个碳原子的烷基,A 是由矿物酸产生的阴离子.     

用Alamine336和DEHPA溶剂萃取钼和钨

获得了用Alamine336和DEHPA(二-2-乙基己基磷酸)从硫酸溶液中萃取钼和钨,以及用DEHPA从钼钨硫酸溶液中选择性萃取钼和钨的平衡数据(25℃)。萃取剂(10％体积)用煤油稀释,用2-乙基已醇(2％体积)作改良剂。报道了初始钼浓度(1—10g/L)和初始钨浓度(5—10g/L)随初始pH、有机相/水相体积比和钨/钼比变化的萃取数据。Alamine336对钼(pH°1—2)和钨(pH°3)的萃取效率都很高,而DEHPA在pH°3时可选择性萃取钼。在pH°3和有机相/水相体积比为1/2时,从钨钼溶液中萃取钼的选择性最好。     

从彩钼铅粗精矿碱性浸出液中提取钼的新工艺

研究了一种从彩钼铅粗精矿碱性浸出液中回收钼的新工艺。该工艺涉及镁盐除硅、N235萃取钼、氨水溶液反萃取钼、盐酸沉淀钼等工序。试验结果表明:在溶液中ρ(Mo)=9.2g/L、ρ(SiO2)=1.01g/L,除硅温度75℃,pH=8.5,反应1h,氯化镁加入量为理论量4倍条件下,除硅率达87.31%;以15%N235-10%仲辛醇-75%煤油溶液作为萃取剂、在Va∶Vo=2.5∶1、pH为1.7～2.0条件下,混合萃取3min,钼的3级逆流萃取率为99.55%;经反萃取和沉淀钼,最终获得钼质量分数64%以上的氧化钼产品。该工艺钼回收率高,除硅效果较好。     

液相沉淀法制备WS2超细粉体

综述了近年来国内外WS2的应用及各种制备技术。以硫化钠与钨酸钠溶液为原料采用液相沉淀法制备WS2超细粉体，通过实验确定最佳工艺条件：采用1．5mol／L的Na2S溶液在85℃下硫化216．56g／L的WO4^2-3～4h，然后加入8mol／L的盐酸反应，可制得粒径分布区间0．1～1．5μm的二硫化钨。产物利用LS800欧美克粒度测试仪进行表征，结果显示：粉体的分散性良好，颗粒分布均匀，粒径D(50)为0．58μm。     

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.