共搜索到155条信息,每页显示10条信息,共16页。用时:0小时0分0秒281毫秒
......
(Gibbsite,G)和拜耳石(Bayerite,B),同时伴随着少量的诺耳石(Norstrandite, N).在本研究中,过饱和铝酸钾溶液自发分解的初始晶相组成分为两类:1) 拜耳石;2) 拜耳石,三水铝石或诺耳石的混合物.这两类产物组的典型XRD谱和SEM像分别如图1和2所示. 通过样品衍射峰与标准PDF卡片JCPDS 74-1775 三水铝石(Gibbsite)和JCPDS 74-1119拜耳石...; (4) (5) 图5 三水铝石和拜耳石的溶度积曲线 Fig. 5 Solubility curves of gibbsite and bayerite MULLIN等[38]指出,在给定温度下,热力学上最稳定的晶相在溶剂......
)06-1543-06 Concentration and mass ratio model of gibbsite precipitation process in alumina production ZHANG Jia-yuan1, LI Yong-qing1, 2, FU Ming-hui1, LIU Bin1, LI Li1 (1. School of Energy Science..., laboratory experiments and industrial tests of the gibbsite precipitation process were employed. On the basis of the dynamic model of decomposition of sodium aluminate solution, a combined dynamic model......
Trans. Nonferrous Met. Soc. China 25(2015) 2415-2421 Non-isothermal thermal decomposition kinetics of high iron gibbsite ore based on Popescu method Zheng-gen LIU1, Zheng WANG1, Jue TANG1, Hong-tao..., China Received 16 September 2014; accepted 15 April 2015 Abstract: The thermal decomposition kinetics of high iron gibbsite ore was investigated under non-isothermal conditions. Popescu method......
Trans. Nonferrous Met. Soc. China 22(2012) 447-455 Thermodynamic model for equilibrium solubility of gibbsite in concentrated NaOH solutions LI Xiao-bin, YAN Li, ZHOU Qiu-sheng, LIU Gui-hua, PENG... important NaOH-NaAl(OH)4-H2O system in Bayer process for alumina production were investigated. A theoretical model for calculating the equilibrium constant of gibbsite dissolved in sodium hydroxide......
is less than 10%. Key words: sodium aluminate solution; gibbsite precipitation process; particle size distribution; model  ... of gibbsite crystal growth 附聚核β是附聚过程最为关键的参数,可以通过如下的式子求解[7]: 上述粒度衡算方程需与质量衡算方程联立求解,种分反应的条件不同,种分过程动力学方程所取的参数也不同,应用研究对象所取得的种分精液,通过间歇反应槽的种分过程实验,获得种分过程浓度变化的动力学方程如下[14]: 3 计算结果与讨论 将整个粒度区间分成26个小区间......
三水铝石体是铀的良好聚集剂,在长期的表生风化过程中,从岩石活化淋滤出来的铀以微粒及超显微颗粒逐渐被三水铝石体所吸附而形成铀矿(化)体. 关键词:埃及西奈; 三水铝石体; 铀矿化; 成矿机理; Sinai Egypt; gibbsite body; uranium mineralization; metallogenic mechanism; [全文内容正在添加中] ......
......
......
文章编号:1004-0609(2008)11-2118-09 油酸对铝酸钠溶液分解过程的影响及在产物表面的 相互作用行为 吴争平,尹周澜,陈启元,曾纪术,李 洁 (中南大学 化学化工学院,长沙 410083) 摘 要:研究添加油酸杂质时,铝酸钠溶液分解过程中分解率,氢氧化铝产品的形貌和粒度的分布变化规律;计算以各种不同方式位于氢氧化铝(gibbsite)的(001)和(100)面时油酸分子的总能量和电子结构,并分析各体系的平衡形态及生长习性.结果表明:油酸对铝酸钠溶液的种分过程产生比较明显的抑制作用,油酸的添加量越大,抑制作用越明显;添加1×10-5 mol/L油酸时可促进附聚,添加1×10-4 mol/L油酸时抑制附聚.计算结果表明:油酸接近氢氧化铝(gibbsite)(001)和(100)表面时,体系总能量升高,说明油酸的存在可降低体系的稳定性;油酸......