机械活化对高炉炼铁烟尘中锌浸出的影响

采用硫酸为浸出剂,对高炉炼铁烟尘进行未活化和活化浸出工艺研究。通过正交试验与单因素试验相结合考察硫酸浓度、浸出温度、浸出时间、液固比对烟尘中锌浸出率的影响。结果表明,未活化的烟尘在液固比8∶1、硫酸浓度170g/L、浸出温度95℃,浸出时间90min时,锌浸出率达到96.78%;而经活化的烟尘在液固比7∶1、硫酸浓度150g/L、浸出温度85℃,浸出时间75min时,锌浸出率达到98.19%。     

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。     

用硫酸从锌铅锡烟尘中浸出锌及富集铅锡试验研究

研究了用硫酸从火法处理电镀污泥所得富含锌铅锡烟尘中浸出锌并富集铅、锡,考察了硫酸质量浓度、温度、浸出时间、液固体积质量比对锌浸出率的影响。结果表明:采用两段逆流酸浸工艺,在液固体积质量比3/1、温度80℃、浸出时间1h、一段浸出硫酸质量浓度30g/L、二段浸出硫酸质量浓度110g/L条件下,锌浸出率达96.44%,渣中锌质量分数降至0.91%,渣中铅、锡分别富集至20.13%和36.86%。通过锌的浸出及铅锡富集,实现了有价金属综合回收。     

从钴渣中浸出钴、锌、镉试验研究

研究了采用水洗—焙烧—还原酸浸工艺从A药剂钴渣中高效回收钴等有价金属,考察了焙烧温度、浸出时间、浸出温度、硫酸浓度、还原剂用量等对有价金属浸出率的影响。结果表明:钴渣在液固体积质量比5/1、常温下搅拌水洗1 h,然后在500℃下焙烧2 h,最后在80℃下用质量浓度80 g/L硫酸、10 g/L亚硫酸钠浸出1 h,钴浸出率在90%以上,锌浸出率在96%以上,镉浸出率大于99%,浸出液中的有价金属可高效回收。     

用硫酸从转底炉粗锌粉中浸出锌

研究了用硫酸从转底炉粗锌粉中浸出锌,考察了硫酸质量浓度、浸出温度和时间、固液质量体积比、搅拌速度对锌浸出率的影响.结果表明:在硫酸质量浓度230 g/L、浸出温度35℃、固液质量体积比1/4、浸出时间80 min、搅拌速度400 r/min条件下,锌浸出率达95％ 以上,浸出效果较好.     

用硫酸从湿法炼锌尾渣中浸出锗

研究了用硫酸从某湿法炼锌尾渣中浸出锗,考察了相关因素对锗浸出率的影响。结果表明:在冶炼渣细度-74μm占84.73%、液固体积质量比5/1、浸出温度90℃、氟化铵用量100 mL(质量浓度50 g/L)、硫酸用量150 mL(浓度5.7 mol/L)、浸出时间120 min条件下,锗平均浸出率为91.73%,浸出效果较好。     

含铅锌渣中铅的富集

提出低酸—高酸两段逆流浸出含铅锌渣新工艺,低酸浸出考察液固比、时间和温度对锌浸出率的影响,高酸浸出考察初始硫酸浓度、时间和温度对锌浸出率及铅品位的影响。结果表明,在低酸浸出,液固比6∶1、时间5h、温度60℃;高酸浸出,初始硫酸浓度170g/L、时间6h、温度95℃的最优条件下,锌浸出率99.29%,铅入渣率98.58%,高浸渣中铅品位62.25%。     

用H_2O_2/H_2SO_4体系从废碱性锌锰电池材料中浸出锌、锰

利用H2SO4/H2O2体系从碱性锌锰电池中浸出锌和锰,考察了硫酸浓度、H2O2浓度、温度、固液质量体积比和浸出时间对锌、锰浸出率的影响。结果表明:硫酸体系中加入H2O2,可显著提高锌、锰浸出率;在硫酸浓度0.55mol/L、H2O2浓度0.66mol/L、浸出温度50℃、固液质量体积比1∶30条件下浸出60min,锌、锰浸出率分别达97%和94%,浸出效果良好。     

富锗浸出渣还原浸出试验研究

针对富锗锌焙烧矿富锗浸出渣(简称富锗浸出渣)常规硫酸浸出时锗、锌浸出率偏低问题，从富锗浸出渣性质、浸出机理分析提出了SO₂还原浸出试验研究方法，对浸出时间、浸出温度、始酸浓度、液固比进行单因素试验研究。结果表明：在釜内压力0.4 MPa、浸出温度120℃、始酸浓度(40～50) g/L、浸出时间4 h、液固比6 L/kg时，锗、锌浸出率分别可达83.1%和94.5%。     

Journal of Rare Earths Contents List of Vol.32(2014)

正~~     

Introducing Two Central Enterprises to Integrate Rare Earth Industry,Shandong Rare Earth Group Breaks Surface

正With the signing of"Letter of intention for Propelling Integration of Shandong Rare Earth Enterprises"between Shandong Province Commission Of Economy and Informatization,China IronSteel Research Institute Group("China Steel Institute"),and China Rare MetalsRare Earth Co.,Ltd("China Rare Earth"),the"Shandong Rare Earth Group"jointly set up by the 3 units thus broke surface.On August 9,reporters of the China Economic Herald learned from Shandong Province     

Aluminium Production by Province or City in 2014

正~~     

Refined Copper Production by Province or City in 2014

正~~     

Aluminium Production by Province or City in 2014

正~~     

China is Planning to Raise rare Earth Resource Tax Again

正In the face of the current situation of the lost WTO dispute on rare earth,and cancellation of export tariff for partial rare earth products,efforts of regulation and integration on rare earth by the state government will again be tightened.Reporters of the Economic Information Daily recently learned from authoritative sources that relevant ministries are     

Fabricated Copper Production by Province or City in 2014

正~~     

Refined Copper Production by Province or City in 2014

正~~     

Chinalco Signed Framework Agreement for Strategic Cooperation with Harbin Municipal Government

正Last month,Chinalco signed framework agreement for strategic cooperation with Harbin Municipal Government in Harbin Xiong Weiping,Chairman of Chinalco,said that based on the strategic deployment to build world top-class mining company with the highest growth potential,Chinalco was now concentrating all efforts on making strategic transition and structural adjustment,strategic cooperation with the local governments where     

Contributions to Baosteel Technical Research wanted

正Baosteel Technical Research,a quarterly journal,which is issued domestically and abroad,is run and sponsored by Baosteel Group Corporation.Baosteel Technical Research mainly reports the achievements in technological innovation,academic research,new product development and industrial equipment improvement by Baosteel.It will continue to follow up on hot topics and serve the company’s technological development and progress.Its readers include experts in