金铜冶炼高砷烟尘酸浸液铜砷分离回收工艺研究

针对高砷白烟尘酸浸液中的铜砷分离回收进行了工艺研究,采用沉铜法分离铜,沉铜液用二氧化硫还原结晶。试验结果表明:在85℃以上加入沉铜剂反应2h可实现铜的分离,铜的回收率达98%以上,沉铜液中的砷通入二氧化硫还原,结晶温度为20℃时,砷的回收率70%左右。该工艺为高砷烟尘酸漫液中的铜砷分离及回收提供了较为可靠的处理思路。     

从布袋灰中提取有价金属的新工艺研究

研究了从布袋灰中提取有价金属的新工艺。采用碳酸钠焙烧—水洗法从布袋灰中除砷,考察了碳酸钠用量、焙烧温度、焙烧时间对除砷率的影响。结果表明,在25g碳酸钠/50g布袋灰、600℃焙烧2h的条件下得到的焙砂经水洗后,水洗渣含砷仅为0.15%,除砷率可达99.85%,此时锌、铜的损失率仅为0.5%。除砷水洗渣提取有价金属的最佳浸出条件为:硫酸浓度1.23mol/L、浸出温度90℃、浸出时间1.5h,在此条件下锌浸出率达98.53%,铜浸出率达97.65%。浸出液中的锌、铜可采用加入过量氢氧化钠的方法得到分离,浸出渣中的铅、锡可加入碳进行还原熔炼得到铅锡合金。     

含砷含铁冶金废水Fenton氧化脱砷处理

采用Fenton预氧化-中和脱砷法对含砷含铁冶金废水进行净化处理，通过单因素试验分别研究了Fenton氧化剂用量、氧化时间对铁氧化率的影响，以及中和脱砷过程药剂用量、反应时间、搅拌速度和反应温度对脱砷效果的影响，并对最优条件的脱砷后液和中和渣与企业工艺参数进行对比。结果表明：向废水中加入5 mL/L过氧化氢(30%)预氧化5 min后，废水中Fe²⁺浓度从2.23 g/L降至0.01 g/L,Fe²⁺氧化率为99.55%。最优脱砷条件为：石灰加入量15 g/L、搅拌速率300 r/min、温度30℃、反应时间50 min,脱砷率为99.9%。中和渣毒性浸出试验结果为0.32 mg/L,满足危险废物浸出毒性鉴别标准(GB 5085.3—2007),实现砷无害化处理。     

含砷氢氧化钠溶液综合回收技术研究

在含砷氢氧化钠溶液中加入氧化剂,35℃~60℃反应后,有效分离其中的锑;再加入石灰乳,常温下反应,将其中的碳酸盐、硫酸盐等除去,并且除去其中0%以上的砷;在加热至0℃~100℃,加入相当于砷重量30~50倍的脱砷剂,反应后冷却,静置,过滤,又能将其中的砷除去%以上;再加入硫酸铁,室温下反应,冷却,澄清,得净化的氢氧化钠溶液,其氢氧化钠含量为60g/L~100g/L,砷含量1.0mg/L。将净化后的氢氧化钠溶液浓缩为氢氧化钠含量2%~6%的固体氢氧化钠,砷含量≤0.05%。该技术流程短,操作简单,实现了对含砷1g/L~5g/L的氢氧化钠溶液的净化提纯和再利用。     

从浮渣铅精矿熔炼产的合金中回收金银的试验研究

针对某冶炼厂采用铜浮渣苏打-铅精矿熔炼法产砷铜铅合金的特点,提出合金苏打-铅精矿熔炼法.试验结果表明:当铅精矿相对合金加入比率为230%时,铅直收率93.36%,金和银直收率分别为91.02%和69.38%,铜在冰铜中的直收率为98%以上.     

氧化酸浸脱砷及稳定化固砷研究

采用氧化酸浸法对高砷冶金废渣进行处理,确定了最佳脱砷工艺。结果表明,在硫酸浓度1mol/L、液固比4∶1、20℃反应4h时,滤渣中砷残留量降低到1%以内。向高砷浸出液中加入还原铁粉进行预处理,并用二价铁氧气氧化法合成晶型良好的砷酸铁固砷材料,经毒性浸出试验检测,完全满足SPLP毒性浸出试验要求,可安全处置。     

含砷金精矿焙烧-氰化浸取金、银的试验研究

研究了含砷金精矿焙烧-氰化浸取金、银的新工艺方法.该方法是在含砷金精矿焙烧时加入一定量的硫酸钠,可大幅度提高金、银的氰化浸出率.试验结果表明:对于砷质量分数为0.45%的金精矿,在焙烧时加入矿样量4%～5%的硫酸钠,可使金、银的氰化浸出率分别达到95%和60%以上,比原工艺方法分别提高5.0%和40%以上.     

氢化物发生-原子荧光光谱法测定精碲中微量砷

提出了一种氢化物发生-原子荧光光谱法测定精碲中微量砷的方法。用硝酸溶解样品,氢氧化钾和盐酸调节溶液酸度至pH 5.5~6.5,碲水解沉淀析出。除去了大量基体后,溶液中碲量少于50μg/mL。在盐酸介质中用硫脲-抗坏血酸将砷(预还原为砷(Ⅲ),以标准加入法绘制校准曲线,氢化物发生-原子荧光光谱法测定砷量。方法的检出限为0.02μg/L,砷量在0.02~40μg/L范围内有良好的线性关系。方法操作简便、快速,应用于精碲中痕量砷的测定,测定结果与正戊醇萃取砷钼蓝分光光度法的结果相符,相对标准偏差为4.2%~8.5%,样品的加标回收率在93%~104%之间。     

双氧水处理-连续滴定法测定铜电解液砷锑

为解决铜电解液中砷锑铋之间复杂化学反应所引起的砷锑分析误差大的问题，在含砷锑矿石的砷锑连续滴定方法基础上，模拟了铜电解液中砷锑的存在环境，开发出适合于铜电解液砷锑测定的双氧水预处理 连续滴定法。首先采用适量双氧水消除As，Sb对砷锑分析结果的影响，再依次加入硫酸和硫酸肼两次冒浓烟至瓶颈，冷却后于盐酸介质中，以次甲基兰 甲基橙为指示剂，先用硫酸铈标准溶液滴定Sb，再用溴酸钾标准溶液滴定As。实验表明，连续滴定法中，适宜的硫酸加入量为20 mL，发烟时间为5 min，滴定锑时的盐酸浓度为43 mol/L，温度为70 ℃，滴定砷时的盐酸浓度为18 mol/L，温度为80 ℃。采用本方法分析合成铜电解液，砷、锑的回收率分别为96 %和104 %。采用该方法分析铜电解生产线上铜电解液，测得结果与原子吸收光谱法吻合，相对标准偏差（n=6）小于12%。     

原子荧光光谱法测定金精矿中的砷汞镉铅铋

研究建立了采用原子荧光光谱仪测定金精矿中砷、汞、镉、铅、铋的方法。通过对比实验选择了水浴溶样法作为砷、汞、铋的预处理方法,选择了盐酸、硝酸、高氯酸和氢氟酸混酸溶样法作为砷、铋、镉、铅的预处理方法。经过条件实验分别确定了两种预处理方法的最小称样量、试剂用量、水浴溶样法溶样时间、混酸溶样法定容介质酸度等最佳实验条件。该方法加入标准物质回收率为92.54%~125.10%,精密度(RSD,n=11)均小于10%,准确度小于8%。     

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     

Jiangxi Promotes Jiangxi Copper Corporation To Become The World's Most Competitive Mining Company

<正>According to the latest info from Jiangxi Province State-owned Assets Supervision and Administration Commission,Jiangxi Copper Corporation was approved to become the first pilot enterprise for deepening reform.Contents of the pilot work is"Three Self"(self expansion,self decision-making,self     

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

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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     

Ministry of Industry and Information Technology: No Short Term Solution For Our Country’s Excess Nonferrous Metal Smelting Capacity

【正】According to the Ministry of Industry and Information Technology,the Ministry has released the 2013 Operation Report on China’s Industrial Communication Indu...     

Chinalco Signed Framework Agreement for Strategic Cooperation with Gansu Province

正Recently,Chinalco and Gansu Provincial People’s Government signed"Framework Agreement for Strategic Cooperation on Reform,Restructuring and Transition Development of Chinalco’s Electrolytic Aluminum Enterprises in Gansu",signifying that the strategic cooperation between Chinalco and Gansu Province had made new substantive progress.     

Unavoidable Economic Cycle:30% Of Nonferrous Metal Companies Were Involved In Restructuring

正Owing to continual downturn in real estate and bulk commodity markets,a number of traditional industries in China suffered unfavorable impact in performance.With the progressive disclosure of third quarter report,the no-pleasant-surprise performance of     

Baotou Rare Earth Became the World's Biggest High Performance Magnetic Material Base

正The High Performance Magnetic Material Phase II Project,an industry upgrading project implemented by Inner Mongolia Baotou IronSteel Rare Earth(Group)Hi-tech Co.,Ltd,recently basically finished equipment commissioning,signifying that the enterprise had developed the production capacity of15000 t/a Nd-Fe-B strip casting alloy and 5000t/a Nd-Fe-B magnet,thus becoming the world’s     

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

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