高铅钼钒物料中分离钼钒的工艺研究

试验用碳酸钠与氧化后的物料进行钠化焙烧,然后水浸出其中的钼、钒。在浸出过程中,钼钒进入溶液,而其它元素Ph、Ag等则留在浸出渣中,并获得了浸出的最佳条件。同时研究了在钼钒溶液中分离钼、钒的工艺,其中用氯化铵沉淀钒,用盐酸与氯化铵沉淀钼。钼的沉淀率大于95％,钒的沉淀率大于92％。     

钒钼铅矿浸出与钒钼分离试验研究

研究了用硫化钠-氢氧化钠复合浸出剂从钒钼铅矿中浸出并分离钒、钼.试验结果表明,钒钼铅矿用碱浸出后,钼、钒进入溶液,而Pb、Ag等留在渣中.最佳浸出条件为:硫化钠用量为理论量的1.1倍,液固体积质量比4∶1,OH浓度约1.5 mol/L,反应温度95～100℃,反应时间3h;浸出液用镁盐除硅后再用氯化铵沉淀钒,钒沉淀率大于95％;用盐酸与氯化钙沉淀钼,钼沉淀率大于99％.     

熔融钒渣直接提钒新工艺

现行钒渣焙烧工艺中的钒渣高温物理热被浪费,对"熔融钒渣直接氧化钠化提钒"新工艺的可行性进行分析,并进行实验室模拟试验。结果表明,新工艺条件下,试验过程中熔融钒渣流动性良好,焙烧后钒渣水浸率为50%～80%,焙烧后钒渣中的钒主要以偏钒酸钠的形式存在。新工艺是合理可行的,具有工业生产价值。     

基于铝热还原制备FeV50渣中钒的赋存状态

通过渣金V-O平衡及VO-Al平衡理论研究,分析了铝热还原FeV50合金制备过程不同冶炼阶段对渣中钒赋存状态的影响,计算得到钒在渣中的热力学还原极限。通过不同物相分析手段,得到铝热还原FeV50合金制备过程实际渣中钒的稳定结构。研究结果表明:渣金共存时渣中钒的稳态为VO;出渣后VO与V_2O_3的稳定性与冶炼氧分压有关,其平衡氧分压为0.41 Pa,常压条件下,VO会进一步氧化。渣中钒含量随合金铝含量的增加而降低,当合金铝质量分数分别为8.0%和20.0%时,对应渣中理论钒质量分数分别为0.16%和0.10%。实际冶炼过程中,冷态刚玉渣中的钒除了已还原FeV_x初级合金之外,主要以类质同象的形式与镁、铝、铁等元素固溶形成Mg(Al,V)_2O_4和(Mn,Fe)V_2O_4复合尖晶石结构。     

HDS渣综合回收利用钒钼的研究

针对V_2O_5含量16.3%、Mo含量2.02%的HDS渣开展综合回收利用钒、钼的研究。结果表明,优选试验条件为:350℃脱油1h,HDS渣粒度-212μm百分含量≥96%,750℃脱碳脱硫2h,碳酸钠添加量与钒钼含量的摩尔比为1.2,800℃焙烧2h,浸出液固比2∶1,浸出温度40℃,浸出时间30min。钒浸出率为94.76%,钼浸出率为96.93%。结果可为含钒废催化剂的综合回收利用提供参考。     

从废铝基催化剂中提取钒、钼、镍、钴、铝的方法

一种从废铝基催化剂中综合提取钒、钼、镍、钴、铝的方法，本发明首先用高温脱除废催化剂表面的油份，再配加氢氧化钠，然后将配好的物料在600—900℃的高温下焙烧0．5—2h，将焙烧后的熟料在80—90℃的热水中浸出；用硫酸对水浸渣进行浸出，酸浸回收镍钴；在水浸液中加入氢氧化钡或铝酸钡，从铝酸钠溶液中依次分离出钒、钼；然后在分离钒钼后铝酸钠溶液中通入二氧化碳，用碳分法制备氢氧化铝；最后将氢氧化铝在高温下煅烧，制备氧化铝。该方法金属的回收率高，都在91％以上，对环境无污染。     

从废催化剂氨浸渣中综合回收钒和钼的研究

采用加碱焙烧-水浸法从废催化剂氨浸渣中提取钒、钼,通过净化、萃取、铵盐沉钒、加酸沉钼和煅烧,可回收得到较纯的V2O5和MoO3产品.试验结果表明:在焙烧温度750℃,碳酸钠用量15%,焙烧时间45 min,水浸温度80℃,时间15 min,液固比2:1条件下,钒、钼的浸取率可分别达90.13%和91.38%.浸出液经净化除杂后,采用20%(原子分数)三烷基胺(N235)萃取钒钼,在优化条件下,钒、钼的一级萃取率可分别达到99.22%和99.80%;用10%(质量分数)氨水进行反萃,反萃水相中钒、钼浓度分别达到22.81和118.63 g·L-1.反萃水相先用铵盐沉淀法沉钒,再用酸沉法沉钼,钒钼分离效果较好,制取的V2O5和MoO3产品纯度分别达98.06%和99.08%.整个回收工艺中,钒和钼的总回收率分别为87.28%和89.43%.     

高钒、铬、锰、钼、铜材料中铝的快速测定——基体用氯化钡沉淀分离

测定高钒、铬、锰、钼、铜等材料中的铝,大量钒、铬、锰、钼、铜等严重干扰,必须采用繁杂的分离手续.冈田等发现,钒在有钡共存的苛性钠溶液中,能形成V/Ba=1/1.4～1.6的大颗粒沉淀,其组成经X—射线衍射鉴别为Ba_5Cl(VO_4)_3或Ba_3V_2O_8,据此使铝与钒分离,并用络合滴定法测定钒铁中的铝.我们对此反应的一些条件进行了试验,结果表明,除钒有此反应外,锰(Ⅱ)、钼(V)、 铬( Ⅲ、Ⅵ)等,也能与钡反应生成沉淀.我们此方法扩大应用于钒渣、铬铁、钼铁、锰铁及锰矿、铜合金中铝的测定,均取得了满     

硫氰酸盐光度法直接测定五氧化二钒中钼量

钒钼共存时在约0．60mol/L的硫酸酸度下，以铜盐为催化剂，硫脲为还原剂，至少30mg钒不干扰钼与硫氰酸盐的显色反应。方法应用于五氧化二钒中钼量的测定。分析结果令人满意。     

用钙盐沉淀法从钠化钒渣中提钒收钠

用钙盐沉淀法预处理钠化钒渣水浸液,使钒钠分离并分别提取.实验室的研究和40kg级的扩大试验表明,本法较好地解决了钠化钒渣水浸液中Na,Si,P和S~(2-)对提钒收钠的干扰和危害,钒和钠的实收率分别为87.9％和50％。本工艺为钠化钒渣提钒收钠提供了一条新途径。     

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.