有机抑制剂在铜浮选中的应用研究

研究了有机抑制剂在铜浮选中的作用,针对两种不同类型的矿石进行了试验研究,获得了较好的浮选指标,在保证较高铜回收率的情况下,使铜品位提高近１０％。     

用新型抑制剂Yn对某难选铜锌矿石抑锌浮铜

广西某待开发难选铜锌矿石将来拟采用铜锌依次浮选工艺流程进行选别。由于矿石中一部分锌矿物与铜矿物可浮性相近,为了能取得较好的优先浮铜效果,采用一种新型小分子有机抑制剂Yn与酯类捕收剂Z-200配合进行了抑锌浮铜试验,获得了铜品位为23.15%、铜回收率为78.24%、锌含量为5.61%的铜精矿,与采用ZnSO₄+Na₂SO₃为抑制剂相比,铜精矿铜品位和铜回收率分别提高4.59和8.83个百分点、锌含量降低2.61个百分点。     

在铂族金属矿石浮选中应用低分子量多糖作为抑制剂

在铂族金属矿物浮选中常用的多糖化合物的分子量(用凝胶渗透柱法测出的)一般为150000～600000.近年来低分子量(100000～150000)的多糖得到了有效地应用.本文评价了低分子量(20000)的改性淀粉抑制剂在浮选南非Merensky矿体铂族金属矿石浮选中的应用,并将它与目前该选矿厂常用的古尔胶和羧甲基纤维素(CMC)的抑翩效果进行了比较.应用开普敦大学制定的分批浮选法评价了低用量的淀粉对天然可浮性脉石矿物抑制作用和对硫化矿物回收率的影响.还用du Bois方法测定了不同浓度的抑制荆在矿物表面上的吸附量.还对一个矿样的浮选产品分析了铂族金属品位.试验结果表明,这种改性的淀粉是天然可浮性脉石矿物的有效抑制剂.     

有机抑制在铜浮选中的应用研究

研究了有机抑制剂在铜浮选中的作用,针对两种不同类型的矿石进行了试验研究,获得了较发的浮选指标,在保证较高铜回收率的情况下,使铜品位提高近１０％。     

组合抑制剂在铜铅分离浮选中的试验研究

针对某铜铅锌多金属硫化矿的特征,通过多种方案的比较,采用铜铅优先浮选,水玻璃 亚硫酸纳 羧甲基纤维素组合抑制剂进行铜铅分离的试验方案,成功实现了铜铅的有效分离,获得了较佳的选矿指标。     

新型铜钼分离抑制剂MX在某辉钼矿浮选中的试验研究

为了响应国家环保政策,选矿过程中不用、甚至少用氰化物,针对洛钼集团三道庄矿石在铜钼分离过程中使用氰化物作为抑制剂的问题,进行了新型铜钼分离抑制剂MX代替氰化物的试验研究。经过4次精选、2次精扫选、精1再磨的闭路工艺流程,在新型抑制剂MX用量为35 g/t的情况下,获得了品位为47.89%,回收率为84.23%的钼精矿,其中钼精矿中含铜0.09%,铜回收率仅为1.86%,浮选分离指标较好。试验最终实现了在铜钼分离过程中新型铜钼分离抑制剂MX代替氰化物的目标,减少了选矿药剂对环境的危害。     

新型抑制剂BK511在某矿铜钼分离浮选中的试验研究

研究采用新型抑制剂BK511,对强捕收剂黄药浮选的铜钼混合精矿进行了铜钼分离浮选试验研究。试验采用两次铜钼分离粗选、钼粗精矿一次精选后再磨、再经五次精选工艺流程,获得了钼精矿含钼45.31%,含铜1.14%,钼回收率89.94%的浮选指标。试验结果表明,BK511对采用强捕收剂黄药浮选的铜钼混合精矿中的铜矿物,具有较好的抑制作用。     

某低品位铜钼矿石混浮捕收剂替代试验

内蒙古某低品位斑岩型铜钼矿选矿厂以酯105+煤油为捕收剂进行铜钼混合浮选,不仅分选指标不太理想,而且煤油采购越来越困难,价格也越来越高,严重影响了正常生产和经济效益的提高。为解决生产中面临的这些问题,采用从美国引进的新型高效捕收剂替代原浮选药剂对该矿石进行了选矿试验。结果表明：以MO+CO-47为铜钼混浮捕收剂,在工艺流程不变的情况下,获得了铜、钼品位分别为1970%、0339%,铜、钼回收率分别为9264%、8034%的铜钼混合精矿,与现场生产指标相比,精矿铜、钼品位分别提高145、0009个百分点,回收率分别提高706、1005个百分点。因此,用MO+CO-47替代原捕收剂酯105+煤油可以取得理想的降本增效效果。     

亚硫酸钠在铜铅分离浮选中的的应用

原矿的多元素分析和铜铅矿物的物相分析结果表明,该矿石以黄铜矿和方铅矿为主,其氧化率分别为25.8%、28.88%。通过“铜铅混浮、尾矿选锌、铜铅分离”的工艺流程,调整剂用“重铬酸钾＋亚硫酸钠”作组合抑铅浮选铜,顺利实现了混合铜铅精矿的分离。     

Bioleaching of copper ore flotation concentrates

The bioleaching of flotation concentrate is a new method for copper recovery that could form the basis of an economic and environmentally friendly process. The main objective of this work was to evaluate a bioleaching process from the treatment of two concentrates, (i) a copper gold bearing concentrate and (ii) an ordinary copper flotation concentrate, using mesophilic bacteria. The special gold-bearing copper flotation concentrate was obtained from the Polkowice Mine. The second material was an ordinary copper flotation concentrate purchased from the Lubin Mine. Bioleaching experiments were carried out in 250 ml Erlenmayer flasks and a rotating bioreactor (biorotor). The most important operating parameters were copper dissolution (%) and surface area. A culture of Thiobacillus ferrooxidans was used for the bioleaching tests. The bioleaching maximum was obtained at both 12% and 15% of the solid. The effect of pyrite addition on the kinetics of copper concentrate bioleaching was also investigated. It was established that 3% of pyrite causes an increase in the bioleaching process. In the case of ordinary flotation concentrate bioleaching, 65% of the recovery was obtained at the initial stage (48 h). In the second stage, the copper recovery slowly increased and after 312 h 86% of the copper recovery was obtained. On the other hand, the surface area of copper concentrate initially increased (at 24 h it was 8.67 m²/g) and then slightly decreased in the second stage.     

云南楚雄铜矿浮选试验研究

云南楚雄某铜矿含铜0.95%,氧化率28.47%,其中结合氧化铜高达18.41%,属典型的混合铜矿。针对该矿石基本性质进行了浮选试验研究,确定了适于该矿的浮选流程及条件。研究表明,采用二次粗选、二次精选、一次扫选工艺流程和简单的药剂制度作为设计流程,可获得闭路试验指标为原矿Cu 0.95%;精矿含铜Cu 20.41%;精矿铜回收率74.40%。     

高品位铜矿浮选流程设计改造

为了适应原矿品位不断升高的需要,先后两次对原有浮选流程进行了技术改造,通过再次改造,采用分支粗选流程,克服了因分级机溢流不稳定而对浮选带来的新的困扰,该流程能够更好地适应生产的需要,最终达到了流程改造的目的,取得了较为理想的效果,尾矿品位进一步降低了0.08%,铜回收率提高了0.60%,铜精矿品位提高了6.42%,减少脱水压滤量18.54%,降低铜冶炼费用18.54%。     

某选矿厂处理角岩型铜硫矿选铜浮选实验

西藏某角岩型复杂铜硫矿,原矿铜品位0.38％,铁品位2.55％,硫品位2.05％,黄铜矿与黄铁矿嵌存关系较密切,黄铁矿可浮性较好,选矿厂采用丁基黄药和丁铵黑药作为捕收剂,最终生产出的铜精矿不合格,选矿现场经添加大量石灰调整后(石灰用量8500 g/t),生产指标没有好转,同时石灰用量过大增加了矿浆黏度,现场操作更加困难...     

某难选铜矿石浮选实验研究

某铜矿石含铜0.84%,铜氧化率15.30%,含铁23.12%,铜铁矿物嵌布紧密,单体解离困难.当磨矿细度为-0.074 mm 92.55%时,铜的单体解离度为86%.针对该矿石特性,铜粗选采用选择性好、捕收能力强的DY-1作捕收剂,再磨中添加石灰,铜精选分离中采用调整剂TZ,取得铜精矿品位21.54%,回收率66.67%的选矿技术指标,为该铜矿的开发提供了可行的技术依据.     

汤丹某难选氧化铜选矿试验研究

云南汤丹某氧化铜矿品位为0.82%,氧化铜约占80%,其中结合氧化铜占30%,属于低品位氧化铜矿。矿石工艺矿物学的研究表明:有用矿物嵌布粒度细,结构形态复杂,是难选氧化矿。试验探索了最佳的磨矿细度,活化剂和捕收剂的类型及用量。在适宜的磨矿细度和药剂制度下,采用一段磨矿,两次粗选、一次扫选、三次精选流程获得的指标是:铜精矿品位14.31%,回收率70.24%。     

Rougher flotation of copper sulphide ore using biosolids and humic acids

In the quest of new, less hazardous, and more ambient-friendly froth flotation reagents, the use of biosolids or humic acids as both collector and frother for the concentration of copper sulphide ores was investigated. Rougher flotation tests were conducted in Denver cells on a laboratory scale, and metallurgical indicators such as copper recovery, copper concentrate grade, and concentration and enrichment ratios were compared with those obtained under similar conditions but using conventional collectors and frothers for the industrial flotation of copper sulphide ores. With a dosage of 10% (w/w) biosolids, copper recovery and grade were 26% and 0.81%, respectively. The copper recovery and grade obtained with 1.5% (w/w) salt of humic acids were 29.7% and 3.5%, respectively. A significantly higher copper recovery (65.1%) was obtained with conventional industrial collectors and frothers, but the grade was also low (3.1% Cu). With the same dosage of humic substances, humic acid show that the flotation rate constant was significantly higher (0.2 min⁻¹) than that obtained with the same dosage of biosolids (0.09 min⁻¹). These results indicate that humic acids have more affinity than biosolids for copper-containing mineral species, and also show that biosolids and humic acids could be used as both collector and frother in the sulphide mineral concentration process by froth flotation. Because the distribution of iron in the concentrate obtained with biosolids is highest, these materials seem to have more affinity for pyrite.