根据理想生长过程粒度分布变化的特性,建立了铝酸钠溶液种分理想生长过程粒度分布变化的数学模型.根据模型求解了理想生长过程的晶体生长线速率,并比较了模型预测粒度分布与实测粒度分布的相对偏差.该模型在搅拌速率相对较高,温度在55～75℃,αk,0为1.5～2.1,固含600g·L-1左右,苛性碱浓度为150～180g·L-1的条件下能较好预测种分过程粒度分布变化.并且通过理论生长模型预测的粒度分布与实测值进行比较,讨论了非理想生长的种分过程的粒度变化规律.
参考文献
| [1] | 杨重舆.氧化铝生产工艺[M].北京:冶金工业出版社,1993:18. |
| [2] | Misra C;White E T.Crystallisation of bayer aluminium trihydroxide[J].Journal of Crystal Growth,1971(08):172. |
| [3] | White E T;Bateman S H.Effect of caustic concentration on the growth rate of Al(OH)3 particles[J].Light Metals,1988:157. |
| [4] | Steemson M L;White E T;Marshall R J.Mathematical model of theprecipitation section of a bayer plant[J].Light Metals,1984:237. |
| [5] | Ilievski D;White E T .Agglomeration during precipitation:Agglomeration mechanism identification for Al(OH)3 crystals in caustic aluminate solutions[J].Chemical Engineering Science,49(19):3227. |
| [6] | Veesler S;Boistelle R.About supersaturation and growth rates of hydragillite Al(OH)3 in alumina caustic solutions[J].Journal of Crystal Growth,1993(130):411. |
| [7] | Seyssiecq I.;Boistelle R.;Lamerant JM.;Veesler S. .Agglomeration gibbsite Al(OH)(3) crystals in Bayer liquors. Influence of the process parameters[J].Chemical Engineering Science,1998(12):2177-2185. |
| [8] | 张平民,陈金清,尹周澜,李洁,陈启元.砂状氧化铝生产过程首槽温度控制预测的准理论模型[J].中国有色金属学报,2001(05):886-889. |
| [9] | 周秋生,李小斌,彭志宏,刘桂华,赵清杰,吴洁.高浓度铝酸钠溶液晶种分解动力学[J].中南大学学报(自然科学版),2004(04):557-561. |
| [10] | 陈金清,刘吉波,张平民,尹周澜,陈启元,张玉敏.铝酸钠（钾）溶液种分过程的分解率和粒度分布[J].中国有色金属学报,2004(03):515-519. |
| [11] | Kumar S;Bautista R G.A study of growth kinetics and mechanism of alumina precipitation by bayers process[J].Light Metals,1994:47. |
| [12] | Crama W J;Visser J.Modelling and computer simulation of alumina trihydrate precipitation[J].Light Metals,1994:73. |
| [13] | Hind Andrew R;Bhargava Suresh K;Grocott Stephen C.The surface chemistry of bayer process solids:a review[J].Colloids and Surfaces,1999(146):359. |
| [14] | Addai-Mensah J;Prestidge C A;Ralston J .Interparticle forces,interfacial structure development and agglomeration of gibbsite particles in synthetic bayer liquors[J].Minerals Engineering,1999,6(12):655. |
| [15] | Terri J S;James A C et al.A static light and X-ray scattering study of supersaturated caustic aluminate liquors[J].Langmuir,2000,16:4784. |
| [16] | Gerson Andrea R;John Ralston;Roger St et al.An investigation of the mechanism of gibbsite nucleation using molecular modeling[J].Colloids and Surfaces A:Physisochemical and Engineering Aspects,1996,110(04):105. |
| [17] | Sweeger C;de Coninck H C;Meekes H.Morphology,evolution and other characteristics of gibbsite crystals grown from pure and impure aqueous sodium aluminate solutions[J].Journal of Crystal Growth,2001(233):567. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%