用化学处理法从低品位辉钼矿精矿中回收钼

本文报导的研究成果涉及两种工艺:(1)苏打灰焙烧法;(2)石灰强化碳热还原法。将它们用于从低品位辉钼矿精矿中提取钼产品的试验已经获得成功。用上述两种工艺已分别产出MoO_3和钼金属半成品,所得半成品再分别用炭吸附—解吸法和熔盐电解精炼法进一步提纯,最终产品的纯度分别达到99．9%和99．8%。此外,这些工艺还提供了包括环境污染和废气治理等的有效解决办法。而它们在处理高品位MoS_2矿石(或精矿)的传统工艺中,正是两个尚未解决的主要问题。     

辉钼精矿熔盐氧化工艺的研究

对辉钼精矿在Na2CO3-Na2MoSO4-NaSO4和NaMoO4-NaSO4体系的熔盐氧化过程进行了研究。结果表明,在控制适当的工艺条件（配料比、温度、鼓风速度和时间等）下,钼的转化率和脱硫率均可达99％以上。对NaCO3-Na2CO3-Na2SO4体系,钼精矿中的钼和硫分别以NaMoO4和NaSO4形态进入溶液。对NaMoO4-Na2SO4体系,钼以NaMoO4形态进入溶液,硫进入气相,烟气中的SO2浓度达5％以上。     

从低品位辉钼矿精矿中提取钼和铼

通过加入熟石灰和纯碱焙烧,然后用湿法处理焙砂可以从辉钼矿精矿中提取钼和铼。在石灰焙烧工艺中,当熟石灰和精矿的比率为0.875时,在550℃下焙烧1h,焙砂用1mol/L的H2SO4在80～90℃下浸出两次,每次2h,钼的回收率可达99%。在碳酸钠焙烧工艺中,当碳酸钠与精矿的比率为1.05时,在650℃下焙烧1h,焙砂用水在80～90℃下浸出2h,钼的回收率在99%以上。采用炭吸附技术,既用活性炭从浸出液(pH=2.0)中选择性吸附钼,然后用氨解吸,得高纯MoO3。加石灰焙烧后的焙砂在80～90℃下用水浸出1h,铼的提取率可达74%。从低品位辉钼矿精矿中提取钼和铼@刘秀珍…     

高效液膜法分离富集钼(Ⅵ)与钨精矿中痕量钼的测定

用TBP－TOPO（协同载体）、N113℃（表面活性剂）、液体石蜡（增强刑）、煤油（溶剂）和内相（1mol／LNaOH水溶液）乳状液膜体系，研究了钙（Ⅵ）的迁移富集行为，确定了用此液膜迁移分离钻（Ⅵ）的最适宜实验条件．钼（Ⅵ）在20min可迁移速率达99·65％以上。在同样条件下，一些共存金属高于如W~6 、Fe~3 、A1~2 Ca~2 Mg~2 Mn~2 Ph~2 Zn~z Cu~2 、Co~2 、Ni~2 、Sn~2 等通过化液膜，迁移率很低或不被迁移，只有钼（Ⅵ）能被迁移富集，因此用（Ⅵ）可与这些金属离子得到很懑意的分离．它集后的溶液用分光光应法测定钼．此法已成功地应用到测定钨精矿中的痕量钼，相对标准偏差小平3．8％，结果满意．     

钨铁和钨精矿中砷磷的联合测定

钨铁和钨精矿中砷磷的联合测定唐华应（峨眉铁合金（集团）股份有限公司中心化验室,四川峨眉山,６１４２２２）文献分别研究了磷秘钼蓝［１］和砷铋钼蓝［２］光度法的显色条件。但用磷铋钼蓝和砷铋钼蓝光度法实现砷磷联测未见报导。钨铁和钨精矿中砷的定量分析至今仍是...     

用N-235萃取回收铼

研究了用N-235从钼精矿焙烧烟气淋洗液中萃取回收铼的工艺条件。铼的萃取率大于99.1%,反萃率高达99.9%。用两次重结晶法从富水相获得的高铼酸钾纯度大于99%。     

低品位钼精矿的化学提纯实验研究

论述了以氢氟酸（HF）为主浸取剂的酸法提纯低品位钼精矿的实验研究，探讨了化学反应机理及过程的控制步骤，结果表明，此项提纯工艺能生产出符合工业标准的钼精矿。     

钼精矿降铁的试验研究与实践

介绍了下垄钨矿生产过程中综合回收的钼精矿降铁的工艺改进及药剂制度，经过试验和生产实践，可获得高质量钼精矿，钼精矿含铁从６％左右降至０．７％。     

某铜钼矿石铜钼分离工艺试验研究

介绍某铜钼矿石铜钼分离的药剂试验结果。硫化钠用量15．5kg／t、水玻璃用量0．55kg／t，闭路试验指标：当铜钼混合精矿中含铜17．85％、钼0．251％时，获得的钼精矿品位46．77％，钼回收率85．72％(其中含铜0．205％)，铜精矿品位17．93％，铜回收率99．995％。     

生产纯三氧化钼的新方法

生产纯三氧化钼的新方法生产纯三氧化钼的传统方法是焙烧一氨浸一热解法。该工艺包括钼精矿氧化焙烧、制取钼酸铰、钼酸铵热解等工序，流程较长。另外，钼精矿焙烧废气中二氧化硫浓度较低（４％～３％），回收利用困难。因而在我国一些中小企业将其直接排入大气，造成严重...     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

正~~     

Zinc Production by Province in 2014

正~~     

China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources