某含铜尾矿粗砂工艺矿物学特征及选矿试验研究

为查找铜损失在尾矿中的原因并制定选矿回收工艺,对某低品位含铜尾矿粗砂进行了工艺矿物学分析和选矿试验研究。结果表明：含铜矿物主要是黄铜矿（CuFeS2）,嵌布粒度微细且呈浸染状分布,未能充分单体解离而损失在尾矿中。经过选矿优化试验确定粗尾砂可采用立式搅拌磨,使微细粒级铜矿物充分单体解离;然后,采用优先浮选工艺回收铜,闭路试验可获得Cu品位18.02%、Cu回收率41.05%的铜精矿。     

Study on bioleaching of primary chalcopyrite ore with thermoacidophilic archae

A high temperature-tolerating thermoacidophilic archae （TA） was isolated from water samples collected from a hot sulfur-containing spring in the Yunnan Province, China, and was used in bioleaching experiments of a low-grade chalcopyrite ore. The TA grow at temperatures ranging from 40 to 80℃, with 65℃ being the optimum temperature, and at pH values of l.5 to 4.0, with an optimum pH value of 2.0. The bioleaching experiments of the chalcvpyrite ore were conducted in both laboratory batch bioreactors and leaching columns. The results obtained from the bioreactor experiments showed that the TA bioleaching rate of copper reached 97% for a 12-day leaching period, while the bioleaching rate was 32.43% for thiobacillus ferrooxidans （Tf） leaching for the same leaching time. In the case of column leaching, tests of a two-phase leaching （196 days）, that is, a two-month （56 days） Tf leaching in the first phase, followed by a 140-day TA leaching in the second phase were performed. The average leaching rate of copper achieved for the 140-day TA leaching was 195mg/（L.d）, while for the control experiments, it was as low as 78mg/（L .d） for the Tf leaching, indicating that the TA possesses a more powerful oxidizing ability to the chalcopyrite than Tf Therefore, it is suggested that the two-phase leaching process be applied to .for the heap leaching operations, whereas, the TA can be used in the second phase when the temperature inside the heap has increased, and the primary copper sulfide minerals have already been partially oxidized with Tf beforehand in the first phase.     

黄铜矿加压浸出生产硫酸铜工艺的研究

本文通过考察温度、时间、液固比、氧分压对黄铜矿中铜和铁的浸出率的影响,给出了最佳工艺条件下,黄铜矿石中铜的回收率不小于96%,所得到硫酸铜的质量达到国标GB437-93优等品的质量的要求。     

低品位铜钼矿选矿技术及应用

内蒙古某铜钼矿矿石中主要有价元素为钼和铜,其品位分别为0.032%和0.165%;铜、钼的氧化率分别为2.44%、0.92%,为原生硫化矿石。根据矿石的特性以及嵌布特性、嵌布粒度,试验对比了两种选矿工艺方案,一种是"铜钼硫混合浮选"方案,另一种是"铜钼部分优先浮选—铜钼硫混合浮选"方案;采用铜钼部分优先浮选—铜钼硫混合浮选—铜钼分离流程,钼粗精矿再磨、多次精选的原则流程。选矿闭路试验所获得的铜精矿产率为0.645%、品位21.66%、回收率84.69%,钼精矿产率0.055%、品位46.78%、回收率80.89%。     

某复杂铜硫矿浮选分离与综合回收试验研究

某复杂铜硫矿原矿硫铁含量高,现场为高碱工艺流程,铜硫分离困难且金银综合回收效率低。采用硫化钠预先活化,"石灰+羧化壳聚糖"作黄铁矿和磁黄铁矿抑制剂,粗选pH=8.5,经一粗两精三扫优先浮选流程可得到含铜24.63%、含金3.41 g/t、含银952.05 g/t,铜回收率84.45%、金回收率32.58%、银回收率75.70%的铜精矿。羧化壳聚糖为清洁高效有机高分子化合物,能高效选择性抑制硫铁矿,在提高主金属铜回收率的同时,伴生金银矿物得到了高效综合回收。     

内蒙古某铜锡多金属矿工艺矿物学及分离研究

内蒙古某铜锡金属为主的硫氧化共生矿体,矿石储量大,硫氧化矿共生、多金属赋存,针对该矿进行了详细的工艺矿物学研究,查明该矿石主要有价成分Cu 1.05%、Sn 0.47%、Ag 51.20 g/t,铜矿物主要为黄铜矿,以不规则状产出,锡矿物主要为锡石,以自形、半自形产出,银黝铜矿与黄铜矿共晶连生紧密。根据工艺矿物学结果进行了该矿石分选探索性试验,确定采用浮选—重选联合流程可以较好的回收铜锡等有价元素。     

JL01新型捕收剂对黄铜矿、磁黄铁矿浮选研究

选矿药剂的种类有很多,但大部分都是有机合成的产品,合成的有机选矿药剂需要消耗很多的化工原料。本论文以新疆某地化工厂废液为研究对象,对该废液进行回收利用,制成新型捕收剂JL01来代替丁基黄药。     

黄铜矿生物浸出钝化及调控研究进展

综述了黄铜矿微生物浸出钝化作用和消除方法的研究现状和发展趋势,认为黄铜矿生物浸出的钝化作用主要有黄钾铁矾、硫及其多聚物、金属缺陷型硫化物和它们协同作用等。要提高黄铜矿生物浸出效果,必须削弱和消除钝化作用,主要的方法有物理法、化学法、生物法和复合法。但4种方法都还不成熟,要工业化应用,还需要大量的研究工作,同时提出从组合矿物对黄铜矿生物浸出钝化的影响开展研究工作,也许能取得突破性进展。     

Isolation of Leptospirillum ferriphilum by single-layered solid medium

According to physiological and biochemical characteristics of Leptospirillum ferriphilum,a strain of object bacteria was isolated successfully.Bacteria were enriched by selective liquid medium and plated on designed single-layered agar solid medium.Colony was cultured and bacteria were collected.The morphologies of the object bacteria were observed using crystal violet staining,scanning electron microscope(SEM)and transmission electron microscope(TEM).The result of 16S rDNA identification shows that this bacterium belongs to Leptospirillum ferriphilum and it is named as Leptospirillum ferriphilum strain D1.These results indicate that this new single-layered agar solid medium is efficient and simple for isolation of Leptospirillum ferriphilum.Additionally,physiological-biochemical characteristics show that the optimum initial pH value and its growth temperature are 1.68 and 40 ℃,respectively.The culture of it is used to leach a complex concentrate chalcopyrite,the leaching efficiencies of copper and iron are 1.93 % and 13.74 %,respectively,and it is more effective than the A.ferrooxidans culture in the leaching of the complex concentrate chalcopyrite.     

氧化预处理技术在铜钼硫化矿浮选分离中的研究进展

黄铜矿和辉钼矿是两种典型的硫化矿, 其浮选分离一直是业界关注的焦点。硫化矿易氧化, 矿物表面氧化程度和氧化产物类型对其浮选行为有重要影响。黄铜矿、辉钼矿在浮选之前进行氧化预处理, 它们会产生不同程度的氧化和不同类型的氧化产物, 这些原因使矿物的表面原有的性质发生改变, 从而改变矿物固有的浮选行为, 实现黄铜矿和辉钼矿的浮选分离。论文介绍了黄铜矿、辉钼矿的表面特性, 分析了其表面氧化机理, 综述了铜钼硫化矿氧化浮选分离的研究现状, 旨在为铜钼硫化矿物绿色、高效浮选分离提供一定的借鉴。