澳斯麦特熔炼烟尘在碱性溶液中的溶解行为

采用NaOH-Na_2S-H_2O溶液对澳斯麦特炼烟尘进行了溶解探索。考察NaOH浓度、Na_2S用量、反应温度、反应时间和液固比对砷、锑、铅和锌浸出的影响。结果表明,在氢氧化钠浓度2mol/L、硫化钠与澳炉烟尘的用量比2g/10g、反应温度90℃、反应时间1.5h、液固比6:1、搅拌速度300r/min的条件下,砷、锑、铅和锌的浸出率分别为91.88%、21.04%、0.57%和12.95%,实现了砷的选择性浸出。     

含砷电积脱铜液制备三氧化二砷的工艺研究

以含砷电积脱铜液为研究对象,采用SO_2还原其中的As(Ⅴ)制备As_2O_3,实现有价元素的回收。结果表明:反应温度为60℃、酸浓度18.00%、反应时间3 h,SO_2通入量20 L/h条件下,As_2O_3纯度为99.63%,As_2O_3直收率为88.05%,还原反应SO_2利用率为35.85%。     

浓硫酸预活化—浸出高铅锌含砷烟尘

针对铅冶炼产出的高铅锌含砷烟尘成分复杂、难于处理的特点,采用浓硫酸预活化—浸出处理工艺,进行铅、锌的回收以及砷、镉等有害元素的脱除。考察预活化及浸出过程中各参数对烟尘浸出过程的影响。研究表明：当酸尘比为1 mL/g、预活化温度60 ℃、预活化时间2 h、硫酸浓度0.5 mol/L、液固比5 mL/g、浸出温度80 ℃、浸出时间2 h,搅拌速度400 r/min时,效果最佳,锌、砷、镉、铅的浸出率分别为98.64%、95.02%、95.26%和0.16%。     

用浓硫酸活化—稀硫酸浸出工艺从铅烟尘中浸出铜锌镉砷

研究了对含砷铅冶炼烟尘以浓硫酸活化、再用稀硫酸浸出铜、锌、镉、砷,考察了浓硫酸与烟尘体积质量比、活化时间、活化温度对烟尘活化及浸出酸度、浸出时间、浸出温度、液固体积质量比对铜、锌、镉、砷浸出率的影响。结果表明：铅烟尘先经浓硫酸活化,再用稀硫酸浸出,铜、锌、镉、砷浸出率得到提高;铅烟尘在酸矿体积质量比1.1/1、活化时间1 h、活化温度80℃条件下活化,再在硫酸质量浓度60 g/L、液固体积质量比6/1、温度60℃、浸出时间90 min、搅拌速度300 r/min条件下浸出,铜、锌、镉、砷浸出率分别为97.6%、98.2%、95.7%、86.0%,浸出渣主要成分为PbSO₄,配料后可返回铅冶炼系统。     

从瓦斯灰中碱浸锌及其动力学研究

研究了用氢氧化钠从瓦斯灰中提取锌,考察了氢氧化钠浓度、固液质量体积比、浸出温度、反应时间及搅拌速度对锌浸出率的影响。试验结果表明:在初始氢氧化钠浓度为6mol/L、固液质量体积比1∶10、浸出温度80℃、反应时间60min、搅拌速度600r/min条件下,锌浸出率为63%。浸出反应动力学分析结果表明,锌浸出过程受扩散与化学反应混合控制。     

常压—氧压碱浸工艺从高砷铅阳极泥中脱砷

采用常压-氧压两段逆流碱浸工艺高效脱除高砷铅阳极泥中的砷。研究了浸出温度、浸出时间、氧气压力、氢氧化钠浓度等对砷脱除率的影响。确定最佳常压碱浸工艺条件为:液固体积质量比5mL/g、浸出温度80℃、浸出时间0.5h;最佳氧压碱浸工艺条件为:液固体积质量比5mL/g、氢氧化钠浓度130g/L、氧压浸出温度140℃、氧压浸出时间4.0h、氧气压力1.0MPa、搅拌速度600r/min。在上述条件下,砷脱除率可达99.0%以上。     

采用硫酸-还原剂浸出工艺从废旧锂离子电池中回收LiNi_(0.6)Mn_(0.2)Co_(0.2)O_2

采用H_2SO_4-还原剂浸出工艺处理废旧锂离子电池正极材料(LiNi_(0.6)Mn_(0.2)Co_(0.2)O_2),研究了H_2SO_4浓度以及浸出温度对有价金属元素浸出的影响,确定了浸出过程中适宜的H_2SO_4浓度为2 mol/L,浸出温度为40℃。在H_2SO_4浓度为2mol/L、原料与浸出剂比例为100g/L、浸出时间为2h、浸出温度为40℃、搅拌速度为500r/min的优化条件下,通过单因素实验考察了还原剂H_2O_2、C_6H_(12)O_6、Na_2SO_3对有价金属浸出的影响。结果显示,还原剂H_2O_2、C_6H_(12)O_6、Na_2SO_3的最佳添加量分别为4.5%、80g/L、60g/L。通过正交实验考察了混合还原剂的影响,结果表明当还原剂组成为120g/L C_6H_(12)O_6和100g/L Na_2SO_3时,Co、Li、Mn、Ni浸出率分别为93.51%、92.68%、95.61%、92.93%,Al浸出率仅达到18.57%。与单个还原剂相比,通过改变混合还原剂的组成,可在不明显降低有价金属(Li、Ni、Mn、Co)浸出率的情况下,控制杂质金属Al的浸出。另外,对于Al、Li的浸出,影响因素的主次关系分别为:Na_2SO_3C_6H_(12)O_6H_2O_2、H_2O_2Na_2SO_3C_6H_(12)O_6;对于Co、Mn、Ni的浸出,影响因素的主次关系为C_6H_(12)O_6H_2O_2Na_2SO_3。     

高砷锡烟尘碱性浸出脱砷试验研究

采用氢氧化钠浸出高砷锡烟尘进行脱砷试验研究,在氢氧化钠浓度150 g/L、双氧水与烟尘质量比0.15、液固体积质量比5:1、反应时间4 h、反应温度90℃的条件下,砷浸出率92.5%,浸出渣含砷1.5%。浸出渣回收锡、铟,碱浸液冷却结晶回收砷酸钠,实现高砷锡烟尘中砷与锡、铟的有效分离。     

用盐酸从加碱焙烧粉煤灰中浸出钛

研究了采用加碱焙烧—盐酸浸出法从粉煤灰中浸出钛,考察了盐酸浓度、浸出温度、浸出时间、搅拌速度和液固体积质量比对钛浸出率的影响。试验结果表明:将粉煤灰与氢氧化钠按质量比1∶1混匀,在微波功率800 W下焙烧5min后再进行浸出,钛浸出效果更好;在盐酸浓度11.64mol/L、浸出温度88℃、浸出时间8h、搅拌速度1 200r/min、液固体积质量比9∶1条件下,钛浸出率为85.77%。     

用氢氧化钠溶液从澳斯麦特熔炼烟尘中选择性浸出砷锑铅锌

研究了用NaOH溶液从澳斯麦特熔炼烟尘中选择性浸出As、Sb、Pb、Zn,考察了NaOH浓度、浸出时间、温度、液固体积质量比和搅拌速度对As、Sb、Pb、Zn浸出率的影响。试验结果表明:在NaOH浓度2mol/L、液固体积质量比5mL/g、温度90℃、浸出时间1.0h、搅拌速度400r/min优化条件下,As、Sb、Pb、Zn浸出率分别为78.4%、0.27%、31.03%和8.9%,初步实现了砷的选择性溶出。     

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.