铅锌烟尘直接硫酸浸出工艺研究

采用硫酸直接浸出铅锌烟尘,考察硫酸浓度、液固比、浸出时间和温度对锌浸出率及铅入渣率的影响。结果表明,在下述优化浸出条件下,锌浸出率达93.55%,铅入渣率92.01%:硫酸浓度175g/L、液固比6∶1、浸出时间60min、浸出温度60℃。     

高铁含锌烟尘浸出工艺研究

对锌烟尘硫酸浸出提取锌工艺条件进行了研究,分别采用正交试验与单因素试验考察浸出酸浓度、液固比、浸出时间、浸出温度对锌烟尘中锌、铁的浸出率的影响。结果表明:较优浸出工艺条件为硫酸浓度150 g/L、液固比7∶1、浸出时间3 h、浸出温度90℃,在较优浸出条件下,锌浸出率可达95%以上。     

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。     

高镉烟尘氧化酸浸试验

采用氧化酸浸法从高镉烟尘中高效浸出锌、镉,研究了过氧化氢用量、浸出温度、浸出时间、液固比及硫酸浓度对锌、镉浸出率的影响。结果表明,在硫酸浓度50 g/L、过氧化氢用量60 g/L、液固比3 mL/g、浸出温度80 ℃、浸出时间2.0 h的条件下,锌、镉浸出率分别可达93.50 %、95.97 %。     

铅反射炉含铟烟尘氧压酸浸的研究

采用氧压酸浸技术对铅冶炼富铟烟尘进行浸出试验研究,详细考察了硫酸用量、氧分压、温度、液固比、时间、粒度等因素对铟浸出效果的影响,确定了氧压酸浸的最佳条件。结果表明,在下述最佳条件下:初始硫酸浓度180g/L、氧分压0.8MPa、温度150℃、液固比5∶1、时间120min、反应物粒度0.15～0.12mm,铟和锌的浸出率分别达到96.74%和99.19%,渣含铟小于0.02%。     

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%。     

氧化锌烟尘提取铟的工艺研究

采用两段浸出-溶剂萃取流程从氧化锌烟尘中提取In,对两段浸出工艺条件进行了研究。实验结果表明,低酸性条件对氧化锌烟尘中Zn、In的浸出具有很好的选择性,可实现Zn的浸出,而In留在浸出渣中。最佳的低酸浸出除Zn条件为:浸出温度60℃、液固比10∶1、硫酸浓度0.16mol/L、浸出时间30min;此条件下Zn浸出率达到了93.73%,浸出渣中In含量达到1 254g/t。最佳高酸浸出提In的工艺条件为:浸出温度70℃、液固比6∶1、硫酸浓度0.8mol/L、浸出时间2h;此条件下In浸出率为89.32%。     

用碳酸钠溶液从铜锌烟尘中脱除氟氯试验研究

研究了用碳酸钠溶液从铜锌烟尘中脱除氟氯,考察了碳酸钠质量浓度、温度、浸出时间、液固体积质量比对氟、氯脱除率的影响。试验结果表明:经过两段逆流浸出,在液固体积质量比2.5∶1、温度80℃、浸出时间60min、碳酸钠质量浓度55g/L条件下,氯、氟脱除率分别为98.95%和85.19%,脱除效果较好。     

用硫酸从高炉瓦斯灰(泥)中浸出锌、铟试验研究

研究了用硫酸从高炉瓦斯泥中浸出铟、锌。试验结果表明:用硫酸从高炉瓦斯泥中浸出锌、铟是可行的;在浸出时间90min、温度90℃、液固体积质量比5∶1、硫酸浓度4.5mol/L条件下,锌浸出率最高达87.03%,铟浸出率为66.52%。     

含铟锡烟尘硫酸氧压浸出提铟试验

对含铟锡烟尘进行硫酸氧压浸出提铟试验。考察了各种因素对铟浸出效果的影响。结果表明,含铟物料在液固比4∶1,硫酸初始浓度150g/L,温度150℃,氧分压0.7MPa,时间150min的条件下进行氧压浸出,可获得93.66%的铟浸出率。     

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

正~~     

Zinc Production by Province in 2014

正~~     

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.