D296树脂从含钼酸性溶液中吸附钼的试验研究

针对含钼高温合金废料酸浸液中钼含量低的特点,采用离子交换法从含钼酸性溶液中提取钼,选用D296树脂吸附钼,通过动态试验考察了料液pH、流速和料液与树脂体积比对Mo吸附率的影响,并测定了Mo吸附曲线。结果表明,当反应温度为25℃,料液pH为2,吸附流速为4.5倍树脂床体积/h时,Mo吸附率达到94.74%;D296树脂对Mo的饱和吸附容量为50 mgMo/g。     

D302-Ⅱ树脂吸附铼的性能研究及应用

针对地浸采铀浸出液低含量铼的回收,研究了D302-Ⅱ弱碱性阴离子交换树脂吸附和解吸铼的性能和机制。通过静态试验考察温度、酸度、时间对树脂吸附的影响;通过动态试验考察了溶液酸度和流速的影响,并进行了解吸剂及其浓度影响试验、抗干扰试验及树脂再生的试验;用地浸采铀浸出液通过D302-Ⅱ树脂,进行模拟回收铼试验。结果表明,D302-Ⅱ树脂对铼的吸附速率快,吸附反应速率常数k=1.6×10-3s-1,半交换期t1/2=433 s。吸附酸度在pH 2.0～5.0范围内,有利于铼的吸附。吸附平衡服从Freundish吸附等温式,吸附反应放热,反应可在常温下进行。动态上柱酸度选择为pH 2.0～5.0,流速1～2 ml.min-1,铼的吸附率可达95%以上;洗脱液选择NH4OH,25倍树脂床体积的3 mol.L-1NH4OH溶液可将铼洗脱完全。地浸采铀浸出液中的共存离子不影响铼的吸附和解吸,0.5 mol.L-1H2SO4溶液可使树脂再生。树脂对铼的静态和动态吸附容量分别为166和162 mg.g-1干树脂,对浓度低至0.03 mg.L-1铼溶液吸附和解吸,回收率可达96%～102%,表明该树脂有较好的应用前景。     

高温合金酸浸液回收高纯铼酸铵试验研究

采用D296树脂吸附—NH4SCN溶液解吸—KReO4晶体析出—C160树脂除杂等工序从高温合金酸浸液中回收高纯铼酸铵。结果表明,铼吸附率可达99.03%;当NH4SCN溶液浓度为8%、NH4SCN解吸液与负载树脂体积比10∶1、解吸流速1BVs/h时,铼解吸率为99.55%;采用10倍理论用量KCl进行浓缩结晶得到KReO4,铼结晶率达到95.14%;再经C160树脂除杂—氨水中和—浓缩结晶—1次重结晶,制得纯度达99.995%的高纯铼酸铵。     

高温合金酸浸液回收高纯铼酸铵的试验研究

采用D296树脂吸附—NH4SCN溶液解吸—KReO4晶体析出—C160树脂除杂等工序从高温合金酸浸液中回收高纯铼酸铵。结果表明,铼吸附率可达99.03%;当NH4SCN溶液浓度为8%、NH4SCN解吸液与负载树脂体积比10∶1、解吸流速1BVs/h时,铼解吸率为99.55%;采用10倍理论用量KCl进行浓缩结晶得到KReO4,铼结晶率达到95.14%;再经C160树脂除杂—氨水中和—浓缩结晶—1次重结晶,制得纯度达99.995%的高纯铼酸铵。     

用D990从污酸中吸附回收铼的试验研究

进行了用D990从铜冶炼烟气淋洗污酸中吸附回收铼的试验研究。考察了H_2SO_4浓度、吸附流速、吸附时间对Re、As、Si吸附率的影响;用NH_3·H_2O对D990富铼树脂进行解吸,考察了NH_3·H_2O浓度、流速的影响。结果表明,D990对铼的吸附性较强,对As、Si有一定的富集作用,当流速4 cm/min、吸附8h时,D990树脂对铼的吸附率为90.4%;用NH_3·H_2O解吸铼,浓度为6%、流速为4 cm/min时,铼解吸率达97.3%;D990对铼的饱和吸附量为0.1 g/g D990干树脂。     

钼精矿焙烧烟气淋洗液中回收铼的试验研究

针对低浓度含铼淋洗液中铼的回收进行了树脂吸附和解吸试验研究。通过研究对比旧树脂和新型树脂,得出合适的吸附和解吸条件。同时通过对温度、流速、解吸浓度等因素进行研究。结果表明,随着氨水浓度升高至3%时,解吸率可升高到98.54%。同时温度越低,流速越小,越有利于铼吸附。     

高铼酸铵除铊试验研究

从铜冶炼污酸中提取的高铼酸铵含有一定量的Tl元素, 影响高铼酸铵品质及制约铼产品的末端应用.文中采用传统的吸附法进行除Tl, 用活性炭、TiO₂、KI与XH30树脂进行静态吸附探索性试验; 在此基础上, 考察了铼液浓度、吸附线速度、铼液pH对XH30树脂动态吸附Tl的影响.结果表明, 活性炭与KI对Tl吸附效果不理想; TiO₂与XH30树脂长时间动态吸附Tl的吸附率分别达96.9 %、97.95 %; 用XH30树脂装柱吸附Tl, 当铼液Re为10 g/L, 铼液Tl约为5 mg/L, pH值为8.5时, 控制吸附线速度为8 cm/min, Tl去除率稳定在93.4 %, 铼液经重结晶后高铼酸铵品位稳定在99.99 %以上.      

钼精矿浸出液中铼与钼的分离试验研究

以钼精矿浸出液为研究对象,通过离子交换试验,实现了铼与钼的有效分离。结果表明,在最佳试验条件下,即采用201#树脂为离子吸附剂,浸出液pH=8.5,流速为20mL/min时,铼的吸附率可达99.97%,其饱和吸附容量达43.66g/kg;采用9%NH4SCN为解吸剂,铼的解吸率可达99.99%,201#树脂再生性能良好,适宜循环使用。     

F1树脂吸附和解吸铼的性能研究

研究了新型功能性阴离子交换树脂－Ｆ１树脂吸附和解吸铼的性能。通过静态试验,考察了铼的介质酸度、温度、溶液铼浓度及时间对树脂吸附和吸铼的影响;在动态试验中,考察了溶液铼浓度,溶液流速和解吸剂流速的影响,对解吸剂和掩蔽剂及其浓度的选择做了较详细的探索,并研究了树脂再生和循环使用情况,试验结果较理想,表明了Ｆ１树脂是一种有很有发展前途的新功能离子交换树脂。     

D-314树脂动态分离钼铼的研究

研究了D-314大孔聚丙烯酸阴离子交换树脂在中性体系中吸附、解吸钼和铼的条件和机制。结果表明,在常温下,溶液的pH=7.0,柱上流速为1.0ml.min-1时,D-314树脂分别对钼和铼有效吸附,然后用2%NH3.H2O-2%NH4NO3混合溶液,流速为4.0m.lmin-1,流出体积为16.5m.lmin-1,和6%NH3.H2O溶液,流速为2.0m.lmin-1,流出体积为13.0ml.min-1,分别对钼和铼进行淋洗解吸,分离系数KMo/Re=384,钼和铼各自的回收率分别为92.40%和83.96%。     

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.