废铁屑还原软锰矿制备高纯硫酸锰工艺研究

研究了采用废铁屑作为还原剂,在稀硫酸介质中湿法还原软锰矿制备硫酸锰的工艺过程。通过单因素实验确定最佳工艺参数,结果表明：当Fe/MnO2的摩尔比为0.78∶1,H2SO4/MnO2的摩尔比为2.1∶1,反应温度50℃,反应时间80 min时,锰的浸出率在95%以上。加入碳酸钙中和调节溶液pH值至5~6,使溶液中的铁、铝等杂质离子水解为氢氧化铁、氢氧化铝等沉淀除去,加入硫化钡使浸出溶液中的重金属离子以硫化物沉淀除去,减压过滤得到硫酸锰粗滤液,向粗滤液中加入二氟化锰使溶液中的Ca2＋、Mg2＋等离子生成氟化物沉淀,然后溶液经过静置过滤得到硫酸锰净化液,滤液经浓缩、结晶制备硫酸锰产品。经检测产品纯度在99%以上,杂质含量低于国家标准。     

锂电池正极片浸出液的净化除杂研究

以废旧锂电池正极极片粉浸出液为原料,采用铁粉还原法沉淀铜—硫化钠深度除铜—中和水解法除铁铝—氟化钠除镁工艺流程综合回收有价金属。结果表明,铁粉加入系数1.1时,铜能大量沉淀,再次加入5倍理论量的硫化钠后,铜接近完全沉淀。调节溶液pH=4,反应时间2h,铁和铝接近完全沉淀。除铁后的滤液用氟化钠除去镁离子,设定反应温度80℃、氟化钠用量2.5g/L,镁去除率达99%。除杂后溶液中Cu2mg/L、Mg5mg/L,Al、Fe能控制在6mg/L以内,后续可采用共沉淀法制备碳酸盐前躯体。     

新技术与新成果

20 0 1 0 1　高冰镍的脱硫方法本发明 ( CN 1 2 531 86A)公开了一种高冰镍的脱硫方法 ,以加硅脱硫为其主要特征。采用本发明的方法可脱除高冰镍中 99%以上的硫 ,镍元素的收得率大于 98% ,且工艺简单 ,易于控制 ,生产成本低。采用本发明处理后的高冰镍 ,可代替电解镍作为钢铁行业的镍元素添加剂。2 0 0 1 0 2　一种铜电解液除锑脱杂方法本发明 ( CN 1 2 540 2 5A) ,适用于酸性电解液净化除锑。其特征是在电解液中加入 H2 O2 以 HI作催化剂 ,将 Sb3 氧化 ,形成锑酸盐沉淀 ,经陈化处理 ,将形成的沉淀物过滤除去。本发明的方法与已有技术…     

EDTA滴定法测定钒渣中氧化钙

通过试验,确定了盐酸、硝酸、高氯酸分解钒渣样品,或碳酸钠-硼酸混合熔剂高温熔融样品后酸浸取的样品分解方式。在硝酸介质中,向试液中加入0.3～0.5 g氯酸钾,使锰形成二氧化锰沉淀,过滤沉淀后,在酸性条件下用无水乙醇将滤液中的钒还原为钒,用氨水调节pH 6~7,绝大部分的钒和铁、钛、铝、稀土等可生成沉淀,沉淀物经过滤被分离。调节滤液pH 7后,加入少量铜试剂分离残余的钒和金属离子,分取试液采用EDTA滴定法测定钒渣样品中的氧化钙含量。随机抽取一个钒渣样品,采用混合熔剂熔融处理样品后进行EDTA滴定法分析,11次测定结果的相对标准偏差为3.1%。对钒渣实际样品中的氧化钙量进行测定,结果与行业标准(YB/T 547.3-1995火焰原子吸收光谱法和高锰酸钾容量法测定氧化钙含量)的测定值一致;对钒渣标准样品进行分析,测定值与认定值一致。     

锌精矿中铁的分析方法研究

试料用盐酸、硝酸、硫酸分解后,用氨水调节酸度使铁沉淀完全,过滤使铁和铜、锌分离。滤液可做锌的测定,滤纸放入原烧杯,用盐酸溶解,调节酸度pH2.0,加入磺基水杨酸做指示剂在近沸的状态下用EDTA标准溶液滴定。     

简讯

从废催化剂中湿法回收镍废催化剂(拉内镍,Ni-Al催化剂等)用含有Ni 18.3,Cu 0.16Te 1.1,Mg 0.12和H_2SO_4190克/升的脱铜废电解液浸出。NiSO_4浆液添加催化剂中和沉淀Fe,Cu和Al的盐类。过滤后溶液处理回收NiSO_4·7H_2O。     

含铪废合金处理工艺研究

采用"电溶—磷酸沉淀"工艺处理某含铪废合金,在电流密度200~300A/m2,电解液酸度1mol/L H2SO4,终点镍离子浓度80g/L的条件下,电溶过程电流效率可达90%以上,电溶效果良好;电溶液在80℃加入1g/L磷酸,铪的回收率可达90%以上;铪的综合回收率达95%以上。     

从废旧三元锂离子电池中回收有价金属的新工艺研究

废旧三元锂离子电池经过放电、焙烧、破碎、筛分等预处理方法分离出电池活性物质、集流体与钢壳,再采用H2SO4-Na2SO3对废电池粉料（活性物质）进行浸出,浸出液调节pH至4.5,过滤以除去铁和铝,滤液再调pH至11左右,将锂和镍钴锰分离,得到的锂液经过浓缩后加入Na2CO3得到工业级的LiCO3,在镍钴锰富集物中加入氨水将锰和镍钴分离,最后使用P507分离镍和钴,在相比O/A=1,平衡pH=4.5,有机相组成为25% P507 75%溶剂油,经二级逆流萃取后钴的萃取率为99.3%。使用200 g/L硫酸为反萃剂,相比为5时,钴的回收率达99.21%。反萃液使用草酸铵沉钴,萃余液中的镍采用氢氧化钠沉淀,整个工艺流程中钴的回收率为91.82%,镍的回收率为91.12%。     

高钴锌电解液制取羟基氧化钴的研究

采用Na_2S_2O_8氧化处理高钴锌电解液。结果表明,加入理论量4倍的Na_2S_2O_8后,在pH 4.0、80℃反应120 min,钴的沉淀率为99.8%,沉钴物的主要物相为CoO(OH)(羟基氧化钴)。沉钴后液除镉、镍后可用于后续电解锌。     

贵金属分离

本方法是用王水溶解金属试样来回收贵金属银、金、钯和铂等,所溶解的残渣中含有铜、镍等杂质。将上述溶解液过滤,滤液干燥,然后用盐酸处理,则银以氯化银形态与金、钯、铂等分离;经此处理后的滤液再用草酸处理,在pH3～4时金被沉淀析出;接着滤液用二甲基乙二肟处理,在pH0.5～1.0时钯沉淀出来;最后用甲酸处理剩余滤     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.