碱性催化氧化含砷难处理金矿石的理论及工艺研究

本文概述了利用稀氨水溶液溶解雌黄以脱砷、在稀氨水中使雄黄与硫磺转化为雌黄、以及稀氨水溶液中雄黄、雌黄和砷黄铁矿的氧化及铜离子的催化作用方面的理论研究；在工艺方面，提供了低温低压下预氧化含砷难冶金矿石新工艺。该工艺用在处理坪定高砷金矿石或含砷锑汞的丹寨浮选金精矿上，金的浸出率可达到８５％。     

自含砷含碳难处理金矿中提金研究

针对甘肃坪定金矿含金、砷高、脉石碱度高、砷矿物中雌黄、雄黄高的特点，了硫氨脱砷－铜氨催化氧化－氰化新工艺，采用了三种新技术，即稀氨水溶解雌黄、雌黄湿法论为雌黄以及在氨水中氧化时用铜离子作催化剂，本研究为小型实验，结果为其一进行了３ｋｇ级放试所证实。     

加压催化氧化氨浸法处理坪定金矿的研究和新工艺开发

坪定金矿是富金高砷高碳难处理金矿,所含砷化合物为雌黄和（或）雄黄,普通处理工艺金的氰化率较低。针对坪定金矿特点,提出“加压催化氧化氨浸法”,成功地实现了坪定矿中金的有效回收。通过向氨性溶液中加入硫磺使雄黄转化为易溶于氨水中的雌黄,再通过氨水将矿物中的雄黄去除。最后,利用Cu2+的催化作用促使砷脱除过程中在金矿表面所形成的不溶性硫膜氧化,便于后续氰化提金的进行。经过该方法处理后的坪定金矿矿石金的氰化率可达到92%以上。由于采用氨性环境,该工艺中所用设备材料都为普通钢材,设备投资小,运行成本低,经济效益高,2年内可实现盈利。     

金三角金矿提金技术基础研究及工业应用开发

全面介绍了我国的2个金三角黄金资源的基本情况,针对2个金三角所产的难冶金矿中砷化合物一般为雄黄和雌黄的特点,详细分析了雄黄和雌黄在氨水中的转化及溶解的机理,从理论上验证了氨法脱砷的可行性。在氨法脱砷过程中,由于溶解于氨水中的雌黄可能会在矿石微粒上吸附,从而形成一层钝化层影响到后续金的氰化过程。因此,必须对脱砷后的金矿进行活化以去除表面钝化膜。Cu2+的加入不仅有利于雌黄钝化膜的脱除,还能显著地提高预处理后金矿中金的浸出率。运用该方法,研究者们对于甘肃坪定金矿、贵州丹寨和东北寨金矿所产难处理金矿进行了氨法脱砷-催化氧化活化-氰化提金扩大实验研究,实验结果表明金的浸出率都在85%以上,与小试所得结果一致。     

难冶金矿中回收金银的雌黄法

难冶金矿中回收金银的雌黄法将含砷的难冶金矿置于加入硫脲的氨水溶液中，使雄黄转化为雌黄，同时氨水熔解雌黄，蒸氨，脱出雌黄，脱砷渣。在氨水介质中，通入氧气，加进催化剂Ｃｕ２＋进行氧化，深度脱砷。由此可获得较高的金银浸出率（９９％）和较高的脱砷率（９７％）...     

自含砷含碳难处理金矿中提取金的研究

针对甘肃省坪定金矿含量、砷高、金部分地赋存于脉石、脉石为碱性、属于难选难冶矿的特点，提出了氨水脱砷－石灰加压氧化－氰化新工艺。当原矿含金８．７ｇ／ｔ及１３．０％砷时，砷可脱除９５％，金可浸出８５％。技术及经济指标预计将较满意。     

含砷金矿石细菌预氧化—氰化提金的渗滤柱浸研究

本文报道了龙王江含砷金矿石的细菌预氧化－氰化提金的渗滤柱浸的实验结果。在摇床实验基础上，模拟渗滤堆浸，进行了９ｋｇ矿石／柱的渗滤柱浸试验。考察了矿石粒度，渗滤方式及细菌活性对渗滤柱浸的影响。实验结果表明，细菌对该含砷金矿的氧化有一定选择性，当脱砷率为３８．４％时氰化浸金率可达６６．８％，脱砷率进一步提高对氰化浸金效果的影响不明显。     

鹿儿坝含砷难浸金矿石细菌氧化柱浸试验研究

介绍了鹿儿坝含砷难浸金矿石细菌氧化柱浸试验研究结果。对５ｍｉｎ粒度的试验样品,采用Ｔ１１０１细菌氧化６８ｄ,砷的氧化率达到５９．３２％,金的浸出率为７２．９９％,比直接氰化柱浸金浸出率提高６０％以上,有效地解决了试验矿石的难浸问题。     

高硫高砷金精矿细菌氧化-氰化浸金试验研究

采用细菌氧化-氰化浸金工艺处理高砷高硫金精矿，研究了不同矿石细度、矿浆浓度、细菌接种量、氧化温度、氧化时间和矿石硫、铁、砷的脱除率对金浸出率的影响。结果表明，在矿浆浓度为10％，氧化温度为32℃，氧化时间10d条件下，金浸出率可达85．1％；矿石中铁、硫、砷的脱除率分别为70．5％，58．7％和41．1％时，金的浸出率高达87．7％。该工艺与常规直接全泥氰化浸出相比，金的浸出率明显提高。     

含砷难处理金矿石的生物氧化

为了确定加工过程中砷的最终结果，评价生物予处理对金提取的影响，研究了难处理合砷金矿石的生物氧化。试验是在半－间歇搅拌生物反应器、连续流搅拌生物反应器和巨柱式生物浸出系统中，使用铁和硫化物联合氧化细菌进行的。监测了生物氧化过程中硫化物的氧化和砷的溶解作用，并将其结果与随后进行的氰化试验过程中的贵金属的提取联系起来。另外，采用阴离子高效液相色谱／原子吸收光谱技术监测了存在于溶液中的亚砷酸盐［Ａｓ（Ⅲ）］和砷酸盐［Ａｓ（Ｖ）］浓度随时间的变化；还评价了最终尾矿和中和生物氧化溶液所得到的含砷矿泥的稳定性。浸出结果表明，使用生物氧化工艺从这种矿石中可获得９５％以上硫化物氧化率和４７％的砷提取率。在生物予处理后的氰化过程中金的提取率由４９％增加到约８０％。溶液中砷的总浓度高达１７ｇ／Ｌ对细菌数目并无明显的不利影响。在所有情况下，砷最初以Ａｓ（Ⅲ）形式溶解。典型的浸出液里Ａｓ（Ⅲ）的含量是Ａｓ（Ⅴ）的１８倍。由于Ａｓ（Ⅲ）化合物比Ａｓ（Ⅴ）化合物稳定性差且毒性大得多，因此矿泥物料在环境中的长期稳定性是至关重要的。本文将对矿泥毒性浸出过程稳定性试验结果加以论述。     

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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