低品位锌精矿综合回收铜工艺研究

某低品位锌精矿含锌31.99%、含铜6.38%,采用抑锌浮铜工艺回收铜,通过一次铜粗选、一次铜扫选、三次铜精选闭路流程试验,最终获得含铜18.23%、锌2.09%,回收率铜85.74%、锌1.93%的铜精矿,含锌45.09%、铜1.29%,回收率锌98.07%、铜14.26%的锌精矿,提高锌精矿质量的同时综合回收了铜。     

磁化浮选铜冶炼废渣中铜及其它有价金属的研究

根据某有色金属公司铜冶炼废渣的特点,开展了利用浮选方法进一步回收其中的铜、金和银等有价金属的研究工作.探索了不同捕收剂对废渣中铜及金、银网收的影响,进行了中矿再磨再选、载体浮选、磁场强化浮选等工艺方案的试验研究.结果表明,在磁场条件下采用高效铜组合捕收剂(丁黄药+Z-200)和组合抑制剂(石灰+Na2S)及合理的工艺流程能获得含铜16%以上的铜精矿,可进一步回收其中的有价金属.铜冶炼废渣的进一步利用不但能为矿山提供新的资源,减少环境污染,而且对矿山盘活固定资产和闲置设备及寻找新的经济增长点都具有十分重要的意义.     

从铜尾矿中回收白钨的选矿试验研究

依据某矿山的矿石性质,进行了原矿化学分析与白钨矿单体解离度测定,测定该选铜尾矿含WO30.21%,S6.09%,试验研究以原矿工艺矿物学研究结果为基础,采用先脱硫再浮选的选矿工艺流程回收钨。试验结果表明:铜尾矿磨矿细度为-0.074 mm含量75%时,采用一次粗选、两次扫选、两次精选的浮选脱硫工艺流程,可获得含硫48.98%、回收率98.15%的硫精矿;选硫尾矿通过两次钨粗选,两次钨扫选,五次钨精选的闭路浮选流程获得含WO355.88%,WO3回收率为80.35%的白钨精矿。     

从锌精矿中回收金银的工艺研究

采用抑锌浮金银工艺,通过一次粗选、一次扫选、一次精选的浮选流程分离回收金银。获得含金20.96 g/t、银1 807.38 g/t、回收率金90.35%、银93.79%的金银精矿和含锌53.97%、锌回收率98.97%的锌精矿。试验结果表明,锌精矿通过浮选分离回收金银,锌精矿品位提高10%以上。实现金银综合回收的同时,锌精矿的品质得到较大提高。     

磁化对浮选药剂及浮选过程的影响

通过磁场对水及药剂溶液的磁化处理,使得水及药剂溶液的光学、电学及其它性质发生变化,研究磁化处理对药剂和矿物作用的影响,以及对浮选过程的影响.测试分析结果表明:水系磁化处理能够引起水及药剂溶液体系的吸光度、pH值、溶氧量和电导率等性质的变化;水和黄药溶液经磁处理后,黄药的吸光度增加,有利于化学反应的发生;同时磁化处理增加了水和药剂溶液体系中的溶氧量,促进黄药的氧化分解,使电解质和自由移动的离子数目增多,迁移率加大,溶液的pH值和电导率升高等.而矿物浮选试验结果表明:水系磁化处理对纯黄铜矿的浮选过程影响显著,磁化水时随着磁场强度从0增加到300 mT时,黄铜矿的回收率从86.74%提高到90.19%,而磁化丁基黄药时,黄铜矿的回收率从86.90%提高到90.44%.     

江西某钼矿选矿试验研究

对江西某钼矿进行了工艺矿物学研究。针对该矿石的原矿性质,以石灰为抑制剂、煤油为捕收剂对该钼矿进行了优先浮钼—粗精矿再磨再选的浮选工艺试验。经过一次粗选、一次扫选、六次精选的闭路试验,获得钼品位46.78%、钼回收率80.40%的技术指标,使原矿中的钼得到有效回收。     

硫化铜矿加压预氧化浸出行为研究

含铜难处理金矿直接氰化浸出率一般较低, 氰化物耗量大, 需经预氧化浸出除去含铜杂质后再氰化浸出。以硫化铜矿物为研究对象, 在添加氯盐的酸性体系中, 开展了黄铜矿加温、加压预氧化浸出过程研究。探讨了预氧化温度、氧气压力、起始硫酸用量、起始氯化钠浓度等对黄铜矿中铜、铁浸出的影响行为。通过理论分析、浸出液化学分析以及黄铜矿预氧化浸出渣的X射线衍射测试研究了黄铜矿酸性体系预氧化浸出的反应历程和预氧化浸出渣的成分。结果表明, 氧化反应初期, 氧气分压、起始硫酸用量、氯化钠用量越大, 铜越容易被浸出, 而氧化后期氧气压力对铜浸出影响较小。预氧化浸出过程中有Cu₉Fe₉S₁₆、Cu₃₉S₂₈及黄钠铁矾和草黄铁矾生成, 而黄钠铁矾和草黄铁矾为渣中的最终产物。     

某复杂多金属矿回收黑钨工艺研究

针对某选矿厂原矿性质,试验采用二段磨矿二段强磁选粗选,有效回收了细粒的黑钨矿.强磁粗精矿脱硫后,通过摇床精选,可以得到品位65.1%的钨精矿.     

Behavior of leaching and precipitation of weathering crust ion-absorbed type by magnetic field

With weathering crust Ion-Absorbed Type Rare Earth （IATRE） ores in southern Jiangxi as an example, rare earth percolation leaching and leaching solution precipitation process research were carried out under conditions of magnetic field. The effect on the rare earth leaching process such as magnetic field strength, magnetization time, magnetization manner, and other factors were discussed. The effect on the mother rare earth liquor sedimentation rate, purity, and crystallization behavior such as magnetic field strength, magnetization time, and magnetization manner were investigated. Leaching and precipitation mechanism of magnetization on IATRE were analyzed. The results showed that the magnetic treatment can improve leaching rate of weathering crust IATRE and the sedimentation rate, and reduce consumption of reagents.     

Kinetic process of oxidative leaching of chalcopyrite under low oxygen pressure and low temperature

Kinetic process of oxidative leaching of chalcopyrite in chloride acid hydroxide medium under oxygen pressure and low temperature was investigated. The effect on leaching rate of chalcopyrite caused by these factors such as ore granularity, vitriol concentration, sodium chloride concentration, oxygen pressure and temperature was discussed. The results show that the leaching rate of chalcopyrite increases with decreasing the ore granularity. At the early stage of oxidative reaction, the copper leaching rate increases with increasing the oxygen pressure and dosage of vitriol concentration, while oxygen pressure affects leaching less at the later stage. At low temperature, the earlier oxidative leaching process of chalcopyrite is controlled by chemical reactions while the later one by diffusion. The chalcopyrite oxidative leaching rate has close relation with ion concentration in the leaching solution. The higher ion concentration is propitious for chalcopyrite leaching.