从某低品位金钼粗精矿中浸出金、钼试验研究

研究了从某金钼粗精矿中浸出金和钼,考察了氧化浸出、加压氧浸和焙烧浸出对金、钼浸出率的影响,确定了氧化焙烧—碱浸钼—浸钼渣氰化浸出金的工艺流程。最佳条件下,钼浸出率大于90%,金浸出率大于95%。     

焙烧工艺条件对钼精矿氨浸的影响

研究了焙烧工艺条件对钼精矿浸出及回收率的影响,并采用XRD、SEM等手段对焙砂和浸出渣进行了表征。结果表明,在温度较低时,由于钼精矿氧化不完全,致使钼精矿的氨浸和回收率都比较低;温度过高时,虽然氨浸率维持较高的水平,但回收率有所降低。随着焙烧时间的增加,氨浸率和回收率先逐渐增大后趋于稳定。在600℃焙烧2h及适宜的浸出条件下,钼浸出率达到93.54%,在浸出液中加入适量碳酸钠,可使钼精矿浸出率增加至97.5%。浸出渣中主要含有CaMoO_4和SiO_2。     

含铜难处理金精矿焙烧—酸浸—氰化提金工艺研究

针对某含铜难处理金精矿,研究了焙烧—酸浸—氰化提金工艺,获得了优化工艺条件。结果表明,在焙烧温度为540℃,焙烧时间2 h,焙砂在初酸浓度为30 g/L、液固比3∶1,浸出温度90℃,浸出时间1.5 h的条件下,Cu浸出率>95%,酸浸渣铜品位可降至0.3%以下;脱铜渣在NaCN浓度为4‰、矿浆浓度为30%,氰化时间24 h的条件下,Au浸出率达96%以上,实现了Au和Cu的高效回收。     

某高砷难处理金精矿回收有价元素试验

采用两段焙烧—酸浸—氰化浸出工艺从某高砷难处理金精矿中回收有价金属。结果表明,一段焙烧温度550℃,二段焙烧温度630℃,酸浸时间90min,控制终点pH 1.0时,铜浸出率达到82.44%;酸浸渣细磨至-0.039mm占88.9%,氰化钠用量6kg/t,氰化浸出48h,金浸出率达到90.98%。     

高砷高硫金精矿回收有价金属工艺研究

采用两段焙烧—酸浸—再磨—氰化工艺从高砷高硫难处理金精矿中回收有价金属。结果表明,在550℃弱氧化气氛下焙烧60min,700℃氧化气氛下焙烧60min;焙砂细磨至-0.038mm占70%,氰化钠用量6kg/t,氰化浸出48h,金浸出率达到90.86%,银浸出率达到56.95%。     

某含铜砷金精矿综合回收金银铜焙烧试验研究

某含铜砷金精矿采用硫酸化焙烧生产工艺进行处理,酸浸铜浸出率仅为86.03%,金、银氰化浸出率分别为92.00%、53.00%,有价金属金、银、铜回收效果均不理想。针对该含铜砷金精矿性质,采用三级工艺,即一级还原焙烧+硫酸化焙烧、二级酸浸浸铜、三级氰化浸出工艺进行处理,并优化了试验条件。结果表明：在最佳条件下,该含铜砷金精矿添加氢氧化钠10.0 kg/t,经过600℃、1.0 h的还原焙烧,焙砂再添加8.0%硫铁矿进行650℃、2.0 h的硫酸化焙烧,焙砂经酸浸浸铜,铜浸出率达到95.35%;酸浸渣经氰化浸出,金、银浸出率分别为96.13%、75.39%,指标较好,实现了含铜砷金精矿的有效回收利用。     

从银精矿中浸出金银的工艺优化试验研究

研究了采用直接氰化浸出及浸出渣焙烧—硫酸浸出—氰化浸出工艺从银精矿中回收银。试验结果表明:银精矿先氰化浸出部分裸露的银,再对氰化浸出渣进行焙烧、酸浸及氰化浸出,银总浸出率达85.06%;直接氰化浸出最佳条件为pH=10,氰根质量浓度1.5g/L,氰化浸出时间36h;氰化浸出渣的最佳焙烧条件为钠盐(片碱)添加量7kg/t,在马弗炉中焙烧1h,焙烧温度630℃;焙烧渣用硫酸浸出,最佳条件为硫酸质量浓度8g/L,浸出时间1.5h;酸浸渣氰化浸出最佳条件为pH=10,氰根质量浓度2g/L,氰化浸出时间36h。     

用低品位钼粗精矿制备工业氧化钼试验研究

研究了用低品位钼粗精矿制备氧化钼,确定的工艺流程为钼粗精矿—氧化焙烧—多次循环碱浸—浸出液除磷—沉淀粗钼酸钙—除硫—沉淀钼—煅烧—氧化钼。试验结果表明:在580℃下氧化焙烧1.5h,9次循环碱浸,钼平均浸出率为85.42%;浸出液中除磷、硫过程中,钼回收率分别为99.64%、99.66%;钼综合回收率为84.82%,所得产品符合GB/T 24482—2009工业氧化钼质量要求。     

新疆某高硫高砷金精矿的预处理氰化浸金试验研究

对新疆某高硫高砷金精矿.加入ZOD助浸剂预处理后氰化浸出,金氰化浸出率由未经ZQD预处理的47.5%增加到89.1 %;加入固化剂CaO-Na2CO3二段焙烧(一段450℃,焙烧1h,二段650℃,焙烧2 h)后,再进行助浸预处理氰化,金氰化浸出率可达95.1%,硫固化率达到80.5%.     

氰化尾渣中金的回收试验研究

某黄金矿山生物氧化-氰化炭浸工艺产生的氰化尾渣中金品位较高,为2. 40~3. 60 g/t。试验考察了焙烧氧化-氰化浸出工艺回收金的可行性。结果表明:在焙烧温度500℃、弱氧化气氛下焙烧120 min,获得的焙砂在氧化钙用量15 kg/t、矿浆浓度33%、氰化钠用量1. 0 kg/t、浸出时间24 h条件下进行氰化浸出,浸渣产率为88. 80%,金浸出率在94. 92%以上;采用焙烧氧化-氰化浸出工艺回收氰化尾渣中的金是可行的。该研究为氰化尾渣中金的回收利用提供数据参考。     

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

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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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Refined Copper Production by Province or City in 2014

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Aluminium Production by Province or City in 2014

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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

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Refined Copper Production by Province or City in 2014

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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