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江西某石英型萤石矿,其中大部分萤石与石英紧密连生,造成单体解离困难,从而影响矿物选别指标。化学多元素分析结果表明,矿石中CaF2品位为67.86%,SiO2、CaO、Al2O3含量较高,分别为19.04%、5.91%和3.32%。这表明矿石中脉石以石英和硅酸盐矿物为主,其他成分含量较少。本文探究了油酸钠(NaOl)和叔十二烷基硫醇(TDM)组合捕收剂对该石英型萤石矿的浮选效果,并对捕收剂进行了表面张力测定。浮选结果表明,组合捕收剂在矿浆pH为9.5,油酸钠和叔十二烷基硫醇摩尔比为8:2时,对萤石的浮选指标最好,通过1粗4精3扫全闭路浮选流程可获得CaF2品位为94.06%,回收率为99.55%的高品级萤石精矿。捕收剂的表面张力测试表明,组合捕收剂的CMC值略小于油酸钠,且在气—液界面的分子排列紧密度高于油酸钠。因此,相比于油酸钠来说,组合捕收剂可以更好的改变矿物表面的疏水能力。上述研究成果可为嵌布粒度细的石英型萤石矿的有效回收利用提供技术支持。 相似文献
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新型捕收剂BK410在某萤石矿中的应用 总被引:4,自引:2,他引:2
研究采用新型捕收剂BK410浮选某石英—方解石型萤石矿。试验结果表明,采用水玻璃作抑制剂、BK410作捕收剂,采用一次粗选、两次扫选、粗精矿一段再磨、七次精选工艺流程,可获得萤石精矿含CaF2 97.88%、回收率83.45%、含SiO2 0.72%、CaCO3 0.71%的浮选指标。 相似文献
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萤石型稀土矿浮选通常采用抑制剂抑制萤石及其它脉石矿物,羟肟酸类捕收剂优先浮选稀土矿物,浮选得到的稀土精矿再磁选提纯得到最终稀土精矿,再从稀土浮选尾矿中回收萤石工艺流程,该工艺和药剂虽然高效回收了萤石型稀土矿中的稀土矿物,但肟类捕收剂有一定毒性,且在优先浮选稀土作业萤石有用矿物的可浮性被强烈抑制,不利于萤石的再次浮选回收。因此,本文采用无毒药剂及稀土萤石同步浮选-稀土萤石混合精矿分离工艺技术,针对复杂难选萤石型稀土矿进行选矿试验研究,选矿原则工艺流程为:原矿磨矿-浮硫除杂-浮硫尾矿稀土萤石同步浮选-稀土萤石混合精矿浮磁分离。由于稀土萤石混合精矿分离浮选作业消除了稀土萤石混合精矿中不同矿物颗粒与捕收剂作用后形成无选择性杂凝聚团对磁选作业的不利影响,明显提高稀土精矿指标。对REO品位1.51%,CaF2品位16.13%的萤石型稀土矿原矿,磨矿细度-0.074 mm 含量占85%,采用预先浮硫,浮硫尾矿一次稀土萤石同步浮选粗选、六次稀土萤石同步浮选精选、稀土萤石混合精矿四次浮选分离和两次磁选分离工艺流程,闭路试验获得稀土精矿REO品位53.81%,REO回收率52.56%,萤石精矿CaF2品位92.03%,CaF2回收率67.77%,实现了萤石型稀土矿中稀土和萤石的绿色同步回收,也为稀土萤石混合精矿的分离提纯提供了一种可借鉴的方法。 相似文献
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对福建某WO3品位0.10%、CaF2品位25.45%的低品位共伴生白钨、萤石矿,以矿冶科技集团有限公司自主研发的高效选矿药剂BK418作为白钨捕收剂,BK410作为萤石捕收剂,采用"白钨常温浮选-常温浮选钨精矿加温精选-白钨常温浮选尾矿浮选萤石"的工艺流程处理该矿石,获得钨精矿中WO3品位为60.48%,WO3回收率... 相似文献
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I. D. Chashchin 《Journal of Mining Science》1991,27(4):337-343
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 77–85, July–August, 1991. 相似文献
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Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 109–113, January–February, 1989. 相似文献
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《Minerals Engineering》1999,12(7):757-768
The “Barreiro” carbonatite complex is located in Araxá, MG, Brazil. The production of apatite concentrate from this ore started in 1978 and the current production capacity is 800,000 tonnes.The ore is subjected to the following unit operations in the concentrator: grinding, classification, low field magnetic separation, desliming, apatite and barite flotation, high field magnetic separation, filtration and drying.Barite and apatite flotations were performed in 300 ft3 (8.5 m3) Wemco mechanical cells until 1992. The replacement of the mechanical cells by flotation columns occurred in two stages: fine fraction flotation circuit in 1993 and coarse fraction flotation circuit in 1994. All the 66 mechanical cells were replaced by 6 flotation columns (3.0 m × 4.5 m × 14.5m), resulting in improved selectivity and recovery and significant reductions in the consumption of the collectors for barite and, mainly, for apatite.The flotation process control monitoring in laboratory bench scale mechanical cells was then inadequate due to the discrepancy with the industrial practice. A specific methodology was developed for batch column flotation testing. The technique was checked by means of comparison with the industrial plant practice of apatite and barite flotation, showing its reproducibility and reliability for process development testwork.The batch flotation column was utilised to evaluate the effect of ions (dosed in the conditioning stage) on the flotation of barite and apatite. Flotation tolerance limits were established for the ions calcium, magnesium, phosphate, fluoride and rice bran oil soaps. Due to the fact that these ions were dosed as sodium salts (in the case of anions) or as chlorides (in the case of cations), the effect of sodium and chloride ions was also assessed (tests with the addition of sodium chloride).The results led to the environmental benefit of a full process of water recirculation in the concentrator without impairing the flotation performance. 相似文献