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《煤质技术》2010,(3)
The floatation of the minerals diaspore and kaolinite was investigated using dodecylamine as the collector.Separating diaspore and kaolinite in a neutral pH pulp is difficult since they then have similar floatability.A depressor consisting of an AlCl3/Na2SiO3 mixture is demonstrated to solve this problem.Diaspore sinking may be seen when the ratio of AlCl3 to Na2SiO3 is 3:1.We refer to this mixture as ATNO.The influence of Al/Si ratio in the feedstock and the grain size of fed minerals on separation was exa... 相似文献
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实现高硫铝土矿工业应用需要解决的难点之一就是如何减少一水硬铝石的夹带。通过单矿物浮选试验、动电位、扫描电镜等方法,研究了脱硫体系下减少一水硬铝石夹带的相关机理。变性淀粉可显著降低一水硬铝石的夹带率,变性淀粉加入不影响黄铁矿回收率,随着变性淀粉用量的增加,一水硬铝石的夹带率逐渐降低到一固定值。 相似文献
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新型螯合剂对一水硬铝石和铝硅酸盐矿物浮选行为的研究 总被引:1,自引:1,他引:0
合成了含有羧基和肟基的新型螯合捕收剂HCMT并研究其对一水硬铝石、高岭石和伊利石的浮选行为。单矿物浮选试验表明,该捕收剂对一水硬铝石、铝硅酸盐矿物的捕收能力差别较大,能有效分离一水硬铝石与铝硅酸盐矿物。通过动电位、红外光谱和电镜扫描(SEM)等研究了捕收剂对矿物的吸附机理,结果表明捕收剂在一水硬铝石表面可能是通过COOH、-NHOH与Al-O形成双环螯合物的化学吸附,而在高岭石、伊利石表面主要是物理吸附。 相似文献
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采用双流法溶出处理我国—水硬铝石矿的可行性 总被引:1,自引:0,他引:1
从我国铝土矿以-水硬铝石矿为主的特点,分析铝土矿的化学成分、矿物以及硅、钛等矿物在溶出加热过程的行为。本文以中州铝厂选矿拜耳法为例,论述-水硬铝石矿采用“双流法”溶出工艺技术上的可行性及经济上的合理性。 相似文献
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对我国铝土矿资源和氧化铝工业发展的认识 总被引:3,自引:3,他引:3
本文从我国氧化铝工业的发展和碱耗、能耗、成本的大幅度降低,分析论证了一水硬铝石原料的优势和劣势,得出了平果型矿石是优质资源,其它矿通过选矿经济脱硅石也可成为优质资源,因而采用拜耳法和选矿拜耳法是我国氧化铝工业技术发展的方向。 相似文献
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1 INTRODUCTIONChinaisrichindiasporebauxiteresources[1,2 ]whichpossessspecialpropertiessuchashighgradeofbothAl2 O3andSiO2 andlowFecontent,buttheAl/Si(massratioofAl2 O3toSiO2 )valueislow .Inordertotreatthediasporebauxite ,unitedmethodsandsin teringmethods[3] arestillappliedalthoughsufferingfromdisadvantagesincludingcomplextechnologyflowchart,highenergyconsumption ,highproduc tioncost ,andrestrainingfurtherdevelopmentofalu minaindustry .However ,byimprovingbauxiteAl/Si>10 ,wecanchoosem… 相似文献
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N, N-diethyl dodecyl amine(DEN12) was synthesized from dodecyl amine, formic acid and acetic aldehyde. The collecting property of DENI2 on diaspore, kaolinite and illite was investigated by flotation test and infrared spectrum. The results show that in the presence of 2.0× 10^-4 mol/L DEN12, the recoveries of kaolinite and illite are all higher than 78% and the recovery of diaspore is 50% in the pH range of 5.5-6.0. The mass ratio of A1203 to SiO2 in concentrate obtained from separation artificial mixture is higher than 10, suggesting that DEN12 can be used as a collector to separate the aluminosilicates from diaspore in bauxite ores at the pulp pH below 8. The measurements of the infrared spectrum approve that the action between aluminosilicates and tertiary amine collector is strong electrostatic adsorption and that of diaspore is weak electrostatic adsorption. 相似文献
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Mohammad Zarbayani Esmaeil Jorjani Mirsaleh Mirmohammadi Mohammad Taghi Shadloo Mohammad Noaparast 《北京科技大学学报(英文版)》2010,17(3):251-256
Jajarm's bauxite deposits are mainly diasporic,and they have a low mass ratio of Al2O3/SiO2. It is necessary to increase the run-of-mine mass ratio before feeding the material to the Bayer process. Chemical analysis indicated that the low-grade bauxite sample from Jajarm contained 43.9wt% Al2O3 and 13.35wt% SiO2, resulting in a mass ratio of 3.29. According to mineralogical studies, the presence of aluminosilicate minerals such as kaolinite, illite, and quartz was the main reason for the decrease of the mas... 相似文献