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temperature or fast initial precipitation rate increases the soda content in ATH. Soda mainly exists in lattice soda and less soda in desilication product (DSP) exists in the fine ATH precipitated..., CHALCOA) and spent liquor (from an alumina refinery in Henan province, China), and μSi (mass ratio of alumina to silica in solution) of pregnant liquor was 400±30 after desilication in sodium aluminate......
.通过分析焙烧矿,其存在一定质量分数的硫矿物,说明黄铁矿并未完全氧化,发生式(5)反应. (3) (4) (5) (6) 图5 原矿,焙烧矿和脱硅精矿XRD衍射图谱 Fig. 5 XRD patterns of ore, roasted ore and desilication concentrate 图6 脱硅精矿溶出赤泥XRD衍射图谱 Fig. 6 XRD patterns... of precipitation activity of desilication products (DSPs) on stability of sodium aluminate solution[J]. Hydrometallurgy, 2016, 165: 261-269. [9] 赵博, 陈延信, 酒少武, 等. 高硫铝土矿悬浮态焙烧及焙烧矿的溶出性能[J]. 中南大学学报(自然科学版......
of Si-O bond strength of kaolinite are influenced most by OH-, therefore the desilication of kaolinite in alkaline solution at relatively lower temperature is easier. Key words: silicon minerals...: Chemical Industry Press, 2006: 65-69. [7] 殷振国, 赵清杰, 陈启元, 等. 伊利石在铝酸钠溶液中的反应脱硅过程研究[J]. 轻金属, 2005(12): 40-44. YIN Zhen-guo, ZHAO Qing-jie, CHEN Qi-yuan, et al. Study of the desilication process of illite......
: The reductive Bayer digestion by using iron powder as reductant is proposed to convert hematite to magnetite and further to dissociate iron minerals from sodium aluminosilicate hydrate (desilication... consisted of kaolinite and quartz as shown in Fig. 1. Sodium aluminosilicate hydrate (desilication product, DSP) was obtained by kaolin reacting with sodium aluminate solutions (ρ(Na2Ok)=230 g/L, αk=3......
·2SiO2·nH2O (DSP). The desilication reaction of aluminate solution containing silicate could contribute partially to forming DSP. Key words: calcium silicate hydrate; aluminate; caustic; reaction......
time is up to a some extent. Desilication efficiency is increased with the increase of solid content of slurry, but is decreased when the solid content of slurry is increased up to a some extent......
. The kinetics of the desilication process was studied and the corresponding kinetics equation was established. The results show that the leaching rate of SiO2 reaches 91.8% under the condition of alkaline... the condition of the leaching rate of SiO2 of 91.8%, NaCn concentration of 1.5 g/L, the solid-liquid ratio of 1:3, leaching time of 48 h. Key words: cyanide residue; desilication; alkaline leaching......
Composition and structure of coal fly ash and its effect on pre-desilication in alkali solution LIAN Xuan, PENG Zhihong, QI Tiangui, ZHOU Qiusheng, LIU Guihua, LI Xiaobin, XIAO Xiaolong (National...: The compositions and structures of three forms of high aluminum fly ashes and their effects on pre-desilication in alkali solution were studied by using modern detection techniques of Fourier infrared spectroscopy......
liquor after two steps above through causticizing reaction. The results show that through the procedures of purification-extraction of vanadium-causticization, the desilication rate and recovery......