用隔膜电积法提取铋和三氯化铁

含锡、铋和钨的硫化矿,浮选分离产出钨精矿和锡铋混合精矿,后者含(%):Bi10～15,Sn7～12,As20～25。用火法冶炼,锡、铋难以分离。若用FeCl_3的盐酸溶液浸出,则Bi_2S_3按反应(1)溶解:     

从硬锌渣中综合回收锌铟锡试验研究

针对火法炼锌过程中产出的硬锌渣,研究了中性浸出锌—浓硫酸熟化水浸铟—碱浸锡,考察了物料粒度、液固体积质量比、体系酸度对锌、铟、锡浸出率的影响。结果表明:在硬锌渣粒度小于200目、液固体积质量比4∶1、反应终点pH为5.0~5.5、反应时间2h、室温、中性浸出条件下,锌浸出率为93%;在反应温度85℃、液固体积质量比8∶1、体系酸度100g/L、反应时间4h条件下进行浓硫酸熟化浸出,铟浸出率达99.7%;在反应温度为室温、氢氧化钠浓度为2mol/L、液固体积质量比3∶1、反应时间2h条件下进行碱浸,锡浸出率达97%。锌、铟、锡得到较好回收。     

宿主石墨粒径对FeCl_3-NiCl_2-GICs的微波吸收性能的影响

以不同粒径的天然鳞片石墨为原料,通过调节反应参数分别制备出一阶的三元FeCl_3-NiCl_2-GICs,系统考察了石墨粒径对FeCl_3-NiCl_2-GICs的导电性能和微波吸收性能的影响。结果表明:FeCl_3-NiCl_2-GICs是一种介电损耗型微波吸收材料,粒径为165μm的一阶FeCl_3-NiCl_2-GICs的最大反射损耗量最大,高达-10.3 d B。在低频范围内,粒径为74μm的FeCl_3-NiCl_2-GICs的吸波性能最好。     

分碲液脱锡工艺研究

研究了分碲液脱锡工艺,考察了复合硅酸盐加入量、反应温度及反应时间对脱锡效果的影响。结果表明:在复合硅酸盐A加入量与锡杂质元素质量比(2.3～3)∶1、反应温度70℃、反应时间2h条件下,锡脱除率95%,碲直收率99%,锡、碲分离效果较好。     

电感耦合等离子体质谱法测定镉同位素时锡、钯、银等元素的干扰及其分离方法研究

研究了以电感耦合等离子体质谱法测定镉同位素时镉与银、钯、锡等干扰元素的分离,结果表明,采用王水水浴加热分解样品,锡的溶出率较低而镉能完全溶出;单质铁能定量置换出溶液中的Ag+,Pd2+等金属离子而Cd2+不被置换;利用SnCl4和CdCl2沸点的差异,即锡与盐酸反应生成的SnCl4在较低温度下挥发而与镉进一步分离,以电感耦合等离子体质谱法对分离后标准样品的镉同位素和银、钯、锡进行了测定,测得镉的回收率可达99%以上,而银、钯和锡的回收率均低于0.5%。该方法实现了样品中镉与银、钯、锡的分离及镉同位素测定的     

钨离子交换工艺中钨锡分离新工艺（I）——交前液中钨锡分离研究

系统地研究了交前液中锡的存在形态和比例以及钨锡分离等问题。研究表明,交前液pH值对锡的存在形态有较大影响,交前液pH值越高,SnS3^2-存在比例越低;利用沉淀剂A能够高效地从钨酸钠溶液中将SnS3^2-选择性优先除去。除锡率随试剂用量的增加而增大,随反应时间的延长而增大,随反应温度的升高而降低。     

采用锌粉置换—氧化水解法分离溶液中的铟和锡

研究了采用锌粉置换—双氧水氧化—水解沉淀法从溶液中分离铟和锡,考察了溶液pH、搅拌速度、反应温度、反应时间等因素对锡置换,以及温度对Sn~(4+)水解、铟回收率的影响。结果表明:在pH为1.0～2.0、反应温度40℃、搅拌速度120 r/min、反应时间4 h条件下,锡置换率约为91%,海绵锡中锡质量分数大于98%,铟质量分数小于0.2%;置换后液经双氧水氧化后,在80℃、溶液pH=2.5条件下水解,抽滤洗涤后获得氢氧化锡沉淀,锡沉淀率为99%以上,氢氧化锡中铟质量分数小于0.5%;铟、锡分离较彻底,回收率较高。     

钨精矿碱浸出液中的钨锡分离研究

研究了钨精矿碱浸出液中锡的存在形式及钨锡分离.试验结果表明,浸出液的pH对锡的存在形式有较大影响,溶液pH值越高,SnS2-/3存在比例越低;沉淀剂M115能够高效地从钨酸钠溶液中将SnS2-/3选择性去除,除锡率随试剂用量增加和反应时间延长而增大,随反应温度升高而降低.在试剂用量为理论用量6倍、室温条件下搅拌1 h,锡去除率可达90%以上.     

锡阳极泥硫化焙烧分离锑的热力学研究

对锡阳极泥硫化焙烧过程进行了系统的热力学计算和趋势分析,重点研究了硫化剂的选择、Sn-S-O系与Sb-S-O系优势区相图的对比、碳对硫化反应的影响。研究结果表明:在同一温度下,FeS2的离解压比SnS和Sb2S3的离解压大得多,故可将锡和锑硫化,而黄铁矿很适合作为锡阳极泥焙烧分离锑工艺所需的硫化剂;高温有利于锡、锑硫化物的生成,而在同一温度下,锑比锡更容易硫化;还原剂碳能促进Sb2O4和SnO2硫化反应的进行,且Sb2O4比SnO2硫化的趋势更强。此外,由于Sb2S3的饱和蒸汽压比较大,故锡阳极泥在硫化焙烧过程中锑以Sb2S3的形式挥发,达到锑开路的目的。     

反应挤出法分离废弃电路板中焊锡的研究

提出一种高效、清洁回收废弃电路板焊锡的工艺,探索了硫酸浓度、硫酸铜过量系数、螺杆转速、反应温度、反应时间和液固比对剥锡效果的影响,采用氧化水解法实现了铜、锡分离。优化得到较为适宜的浸锡工艺条件:硫酸浓度1.2 mol/L,硫酸铜过量系数1.2,螺杆转速75 r/min,反应温度50℃,反应时间2.5 h,液固比3∶1。在此优化条件下锡的浸出率达98.74%。采用氧化水解法进行铜、锡分离,锡的沉淀率可达96.3%,铜的损失率为0.37%。     

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.