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, 12.13 wt% goethite, 8.86 wt% gibbsite, 5.02 wt%perovskite, 9.70 wt% quartz, 3.23 wt% anhydrite,29.92 wt% Na2Al2Si5O14 and 9.67 wt% Al3Fe5O12.Besides, the scandium content in the Bayer red mud is 84.32......
, goethite, and gibbsite are the dominant mineral phases with minor amounts of hematite, kaolinite, and quartz. The sample contained 34.22wt% chromite, and chromite liberation is more than 80% for grains......
analysis and semi-quantitative analysis. The thermodynamics of leaching process was analyzed. The results show that the major minerals in the bauxite are gibbsite, secondly goethite and quartz... the bauxite in the acid system has not been reported. The gibbsite is also named as the water aluminite or aluminium-oxygen, with Al(OH)3 as its structural formula and with Al2O3·3H2O as its molecular formula......
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and the amount of adding NaHCO3 comes to 151.2 g/L, the precipitation ratio is all higher than 80%. XRD and TG results indicate that the products consist of boehmite and gibbsite, and increasing SR... and gibbsite particles are inlaid together to form aggregates with SR of 0-1.0 and NaHCO3. The sand products can be got by gradually increasing the amount of adding NaHCO3 in the precipitation process. Key......
in seeded precipitation process. The effect of the dosage and type of addtives on the decomposition ratio of sodium aluminate solution and particle size distribution (PSD) of gibbsite was investigated...量的核糖对氢氧化铝粒度分布的影响 Fig.4 Effects of ribose additives at different dosages on particle size distribution(PSD) of gibbsite 图5所示为不同添加量的四氢糠醇对氢氧化铝粒度的影响.由图5可知,在此实验条件下,四氢糠醇的添加对产品氢氧化铝粒度的影响很微弱,当添加量为100......
decomposition of hydrated minerals present in natural iron ores(i.e.,kaolinite,gibbsite,and goethite) was investigated in a laboratory-scale vertical fluidized bed reactor(FBR) using isothermal methods......
the fine particle amount. Moreover, lithium ion in the solution changed the morphology of ATH by improving the growth of the (110) and (200) planes of gibbsite. A large amount of fine bar- or flake... studied in sodium aluminate solution [11-15]. Presence of K+ ion (K2O 10-90 g/L) in aluminate solution slightly improved precipitation rate and ratio. Meanwhile, morphology of gibbsite was different from......
aluminate solution, respectively. The inhibitory effect derives from the adsorption of amino or carboxyl group in α-alanine on the active surface sites of gibbsite, which was confirmed by the alleviating... precipitation process of sodium aluminate solution. Optimizing operating conditions, activating seeds and using additives are the main measures which have been applied in the production of gibbsite. Among......
酸钠溶液碳分相比,苛碱浓度对铝酸钾溶液分解的影响更大. REFERENCES [1] LI Jun, PRESTIDGE C A, JONAS A M. Secondary nucleation of gibbsite crystals from synthetic Bayer liquors: effect of alkali metal ions[J]. Journal of Crystal Growth, 2000, 219: 451-464. [2] PRESTIDGE C A, IGOR A. Cation efects during aggregation and agglomeration of gibbsite particles under synthetic Bayer crystallisation conditions[J]. Journal of Crystal......