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铝土矿反浮选体系分散与凝聚理论 总被引:21,自引:3,他引:18
在铝土矿反浮选脱硅过程中,矿浆悬浮液的分散和凝聚状态对微细粒-水硬铝石的回收和精矿铝硅比有显著影响。要使各种硅酸盐矿物混合物达到有效的选择性分离,首先必需使矿浆悬浮液处于最佳分散状态,避免各种矿物细粒间的相互混杂和矿泥罩盖。针对高硅铝土矿反浮选脱硅过程,根据经典DLVO理论,从颗粒间的相互作用分析了微细粒-水硬铝石在各种含硅脉石矿物表面的粘附情况。结果表明:一水硬铝石与含硅脉石矿物颗粒间的范德化相互作用总是吸引;而它们间的静电相互作用在弱碱性条件下时为排斥,在弱酸性条件下时为吸引,一水硬铝石的夹带上浮较为严重,不利于铝土矿的反浮选。 相似文献
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完成单位:北京矿冶研究总院、山东铝业股份有限公司。“铝土矿选矿脱硅新技术研究”旨在提高我国中低品位一水硬铝石型铝土矿的铝硅比,使其可经济地采用常规拜尔法或烧结法生产氧化铝。针对我国一水硬铝石型铝土矿矿物自然粒度细小,镶嵌关系复杂,富连生体嵌布粒度较粗和主要脉石矿物易泥化等特点。该成果继承和发展铝土矿选矿“九五”攻关成果,首次提出了铝土矿粗粒快速浮选的工艺思路并创造性的将“粗细分选”技术应用于铝土矿选矿脱硅过程,开发了“选择性磨矿-粗细分选”新工艺。其特征是在粗磨条件下,将磨后矿物分级获得粗细两个粒级产品… 相似文献
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十二烷基胍对铝硅矿物的浮选分离 总被引:2,自引:0,他引:2
采用含有胍基的长碳链季铵盐作捕收剂,研究-水硬铝石、高岭石、叶腊石和伊利石单矿物的浮选行为、铝硅人工混合矿样的浮选分离以及河南铝土矿的精选.结果表明:在捕收剂用量为2×10-4mol/L条件下,在广泛的pH范围内,十二烷基胍对硅酸盐矿物具有较好的捕收能力,平均浮选回收率可达80%;强碱性条件下,一水硬铝石的浮选回收率从80%急剧下降至20%,与高岭石、叶腊石和伊利石之间形成较大差异:以十二烷基胍为捕收剂可望实现铝硅矿物反浮选分离:实际铝土矿(原矿铝硅比为5.70)经过反浮选脱硅,精矿铝硅比达11.08,铝浮选回收率为75%;与传统的阳离子捕收剂十二胺相比,胍类阳离子捕收剂对硅酸盐矿物浮选能力强、受pH的影响小,是一种新型高效的铝硅矿物浮选分离捕收剂. 相似文献
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一水硬铝石型铝土矿焙烧碱浸脱硅新工艺(Ⅰ) 总被引:4,自引:0,他引:4
针对中、低铝硅比的一水硬铝石—高岭石型铝土矿 ,以山西铝土矿作原料 ,在回转窑上进行了焙烧脱硅工艺研究 ,结果表明 :采用回转窑焙烧铝土矿是可行的 ,其焙烧工艺条件为 :矿石粒度 0~ 2 0mm ,焙烧温度10 5 0~ 110 0℃ ,焙烧时间 15~ 2 0min。在碱浸溶出脱硅条件下焙烧矿的脱硅率达 5 5 .6 1% ,精矿铝硅比为 9.92。X射线衍射分析表明 :焙烧过程中高岭石发生热分解产生的非晶态SiO2 ,在碱浸溶出脱硅过程中溶于NaOH脱除。高压溶出试验表明 :脱硅铝精矿中Al2 O3 的溶出率比原矿要高。 相似文献
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磷酸盐对一水硬铝石和高岭石浮选的选择性作用 总被引:8,自引:4,他引:8
研究了磷酸盐对一水硬铝石和高岭石的浮选性能。六偏磷酸钠(SHMP)在低用量条件下,对高岭石的抑制作用大于对一水硬铝石的,可以实现铝土矿的正浮选脱硅;而在高用量的条件下,六偏磷酸盐对一水硬铝石的抑制作用很强,对高岭石的抑制作用与低用量条件相比没有明显变化,因而可以实现铝土矿的反浮选脱硅。通过磷酸盐的溶液化学、六偏磷酸钠对一水硬铝石和高岭石矿物的ξ-电位影响及其在矿物表面上的吸附量测定,同时通过显微镜对溶液中的矿物颗粒成像,探讨了(NaPO3)6在一水硬铝石和高岭石的胺阳离子反浮选体系中的作用机理。 相似文献
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铝土矿选精矿偏细制约了它在工业上的应用,通过工艺矿物学的研究发现,矿石中存在大量粒度较粗的一水硬铝石富集合体。因此,铝土矿选矿完全可以以一水便铝石富集合体为解离对象,以一水硬铝石富连生机为捕收对象,为放粗精矿粒度打下了理论基础。但是在各矿石中,仍存在一部分一水硬铝石和含硅脉石矿物呈隐晶质或微晶体集合体,通过工艺流程的研究,开发的“两段闭路磨矿-一中矿再磨一次选剂”工艺流程,解决了精矿粒度与回收率之间的矛盾。在工业试验中,通过优化浮选药剂,强化对一水硬铝石富连生体的捕收,改善浮选机的运行参数,强化粗粒上浮。取得了良好的分选指标,精矿粒度放粗至74.44%- 0.075mm。 相似文献
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Improvement of flotation behavior of Mengzi lead-silver-zinc ore by pulp potential control flotation 总被引:1,自引:0,他引:1
The electrochemical behavior of Mengzi lead-silver-zinc ore flotation system was studied. Based on the electrochemical characteristics of sulfide mineral flotation system, a stage potential control flotation was developed with the main parameters of pulp potential(φp), pH value and collector dosage. Using N,N' diphenylamino-dithiolphosphoric acid(NNDDC) as a collector, which has good selectivity for galena flotation at pH 8.8 and pulp potential 330 mV, DDTC is used as secondary collector to improve both the grade and recovery of Pb and Ag. The pulp potential values significantly influence the floatability of practical minerals and single minerals when using NNDDC as the collector. The flotation recovery of galena reaches 85% at about 0.3 V and pH8.8. With the usage of pulp potential control during grinding and flotation, the new pulp electrochemical technology for Mengzi lead-silver-zinc ore flotation was developed. The results show that the grades of Pb and Ag of galena concentrate are 55% and 1 800 g/t, respectively, while the recoveries of Pb and Ag are 86.5% and 65%, respectively, the grade of Zn of marmatite concentrate is 42.5%, and the recovery of Zn is 91.25%. 相似文献
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采用一阶浮选动力学模型对金矿石的浮选回收率进行了拟合,以研究矿浆浓度对不同粒径金矿浮选速率的影响。结果表明,浮选矿浆浓度与金的累积品位呈反比,而与金的累积回收率近乎呈正比,低浓度比高浓度矿浆更有利于金的高效富集,高浓度矿浆下更有利于金的回收。粗颗粒金比细粒级金更适应高浮选矿浆浓度体系,其浮选回收率及累积品位均更高。实际矿石试验验证了浮选动力学拟合结果,在50%的浮选矿浆浓度中,经闪速浮选协同常规浮选工艺,可以获得金品位50.0 g/t,回收率88.93%的金精矿,获得了比单一常规浮选更好的技术指标。 相似文献
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Flotation of indium-beard marmatite from multi-metallic ore 总被引:1,自引:0,他引:1
Flotation of indium-beard marmatite from Dulong multi-metallic ore in Yunnan Province of China was studied to improve the grades and recoveries of zinc and indium of the zinc concentrate in Dulong concentration plant.The experimental results indicated that copper sulfate mixed with a chemical reagent X-1 as the activator in the marmatite flotation produced a much better beneficiation than copper sulfate alone,increasing the zinc and indium recoveries of 10% and 6%,respectively,while the concentrate grades remained unchanged.Also,the new activator acted well around pH 10,allowing large savings on lime consumption in the rnarmatite flotation.In addition,it has been found that a sufficient activated lime of activator with ore slurry in the flotation is needed to achieve good beneficiation of the marmatite ore. 相似文献
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1INTRODUCTIONScheeliteoresalwayscontainfluoriteandcalcite.Whentheheadgradeoffluoriteisupto15%CaF2,thefluoriteisofeconomicvalu... 相似文献
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某高砷富银铋硫矿为硫化矿混合精矿,表面受到浮选药剂污染,各种矿物之间的可浮性相近,给分离带来不利影响。采用“混合精矿加温脱药-脱药精矿铋银优先浮选-铋银尾矿砷硫活化浮选”工艺流程进行处理,采用高效银铋捕收剂SAC,全流程实验获得的银铋精矿含银4386 g/t、铋13.06%、砷0.61%,回收率为银88.52%,铋85.51%;砷硫精矿含硫36.37%、砷9.69%,回收率为硫93.71%,砷97.57%。实现了混合精矿中铋银砷硫的综合回收。 相似文献
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Qing-quan LIN Guo-hua GU Hui WANG You-cai LIU Chong-qing WANG Jian-gang FU Jun-yao ZHAO Luo-luo HUANG 《中国有色金属学会会刊》2017,27(10):2260-2271
A copper–molybdenum iso-flotability flotation process has been developed to efficiently improve the recovery of molybdenite from Duobaoshan porphyry Cu–Mo ores. The effects of flotation approach, type of collector, feed particle size distribution, rougher pH value and reagent dosage on the recovery of molybdenite were evaluated systematically. The results suggest that compared with kerosene and diesel oil, transformer oil has stronger dispersion capability in water media and better flotation selectivity for molybdenite, providing a higher molybdenum recovery under low reagent dosage. Moreover, compared with bulk flotation approach, the iso-flotability flotation approach using transformer oil as a collector can obtain superior Mo recovery (90.77%) and grade (0.80%) in the cleaner concentrate, and increase the Mo recovery and grade by over 18% and 5% in the final Mo concentrate, respectively. The results of commercial flotation further indicate that the iso-flotability flotation approach is a rational and effective route to beneficiate the porphyry Cu–Mo ores. 相似文献