三水铝石低温溶出工艺制备砂状氧化铝技术研究
|
摘要
山铝拜尔法使用进口三水铝石矿,采用低温溶出工艺,在该工艺条件下种分分解工艺不断优化,尝试提高砂状氧化铝的合格率。首先在实验室对碳酸化分解氢氧化铝、种分分解氢氧化铝晶种进行对比,寻求更佳晶种类型；在间断种分分解、连续种分分解等工艺上进行一系列的扩大化试验,给工业化生产摸索适合的技术条件。
本课题通过采取使用电子显微镜观察氢氧化铝形态、激光粒度分析仪检测氢氧化铝晶种粒度分布等措施指导生产。通过优化一系列的工艺流程,实现提高旋流器分级效率,优化结晶助剂效果,实现模拟一段法和二段法的流程适时切换,奠定了流程基础。通过调整种分槽的温度、固含以及持续时间等工艺条件,总结氢氧化铝粒度变化的规律,同时对晶种粒度分布影响氢氧化铝粒度进行探讨,总结出了强化附聚、成核等过程的工艺制度,进而形成一套较为成熟的分解工艺。
Bayer method of the Corporation of ShanDong Aluminum properties import gibbsite, It adopts low-temperature dissolution process. In this latter the seeded precipitation continuously optimize, try to improve the rate of sandy alumina. First, in the laboratory through comparing to real aluminum hydroxide and seeding aluminum hydroxide,seeking better seed types. Secondly in the continuous seeded precipitation and the discontinuous seeded precipitation, organizes a series of enlargement test, seek more suitable technology conditions for the industrial production.
This topic adopts a series of measures to direct production.By using electronic microscope observe aluminum hydroxide form.By using laser particle size analyzer detects aluminum hydroxide crystal size distribution.Through a series of process optimization and improve efficiency of hydrocyclone classifier, optimizing auxiliary efficiency, simulative one flow method and two flow method Changes each other for timely,lay the foundation.By adjusting the temperature and solids content of aluminum hydroxide serous fluid, including the duration of the process conditions, summarized the rule of aluminum hydroxide particle changeing. By adjusting the temperature of aluminum hydroxide serous fluid, including solids content and the duration of the process conditions, summarized the rule of aluminum hydroxide particle changeing.while analysising the relationship between the aluminum hydroxide seed of particle size distribution and aluminum hydroxide particle.summarized the process technology system of strengthening agglomeration and nucleation, and formed a set of mature seeded precipitation technique.
本课题通过采取使用电子显微镜观察氢氧化铝形态、激光粒度分析仪检测氢氧化铝晶种粒度分布等措施指导生产。通过优化一系列的工艺流程,实现提高旋流器分级效率,优化结晶助剂效果,实现模拟一段法和二段法的流程适时切换,奠定了流程基础。通过调整种分槽的温度、固含以及持续时间等工艺条件,总结氢氧化铝粒度变化的规律,同时对晶种粒度分布影响氢氧化铝粒度进行探讨,总结出了强化附聚、成核等过程的工艺制度,进而形成一套较为成熟的分解工艺。
Bayer method of the Corporation of ShanDong Aluminum properties import gibbsite, It adopts low-temperature dissolution process. In this latter the seeded precipitation continuously optimize, try to improve the rate of sandy alumina. First, in the laboratory through comparing to real aluminum hydroxide and seeding aluminum hydroxide,seeking better seed types. Secondly in the continuous seeded precipitation and the discontinuous seeded precipitation, organizes a series of enlargement test, seek more suitable technology conditions for the industrial production.
This topic adopts a series of measures to direct production.By using electronic microscope observe aluminum hydroxide form.By using laser particle size analyzer detects aluminum hydroxide crystal size distribution.Through a series of process optimization and improve efficiency of hydrocyclone classifier, optimizing auxiliary efficiency, simulative one flow method and two flow method Changes each other for timely,lay the foundation.By adjusting the temperature and solids content of aluminum hydroxide serous fluid, including the duration of the process conditions, summarized the rule of aluminum hydroxide particle changeing. By adjusting the temperature of aluminum hydroxide serous fluid, including solids content and the duration of the process conditions, summarized the rule of aluminum hydroxide particle changeing.while analysising the relationship between the aluminum hydroxide seed of particle size distribution and aluminum hydroxide particle.summarized the process technology system of strengthening agglomeration and nucleation, and formed a set of mature seeded precipitation technique.
引文
[1]毕诗文主编.氧化铝生产工艺[M].化学工业出版社,2006
[2]杨重愚.氧化铝生产工艺学[M].冶金工业出版社,1991
[3]陈谦德,李小斌译.碱法综合处理含铝原料的物理化学原理[M].中南工业大学出版社,1998
[4]李小斌,龙远志,杨重愚等.铝酸钠溶液晶种分解动力学初步研究[J].轻金属,1988,(11)：10-13
[5]王天庆.拜尔法铝酸钠分解降温工艺的改进实践[J].轻金属,2004,10(5)：5-7
[6]周秋生,李小斌,彭志宏等.高浓度铝酸钠溶液晶种分解动力学[J].中南大学学报,2004,35(4)：557-560
[7]王雅静,翟玉春,田彦文等.苛性比对铝酸钠溶液结构和性质的影响[J].东北大学学报,2003,24(4)：774-776
[8]陈启元等.有色金属基础理论研究(新方法与新进展)[M].科学出版社
[9]L I J un, PRESITIDGE C A, ADDAI2MENSAH J. The influenceof alkali metal ions on homogeneous nucleation of Al (OH) 3 crystalsfrom supersaturated caustic aluminate solution [J]. Journal of Col2 loid and Interface Science,2000,224 (2):317-324
[10]IL IEVSKI D, RUDMAN M, METCAL FE G The separate rolesof shear rate and mixing on gibbsite precipitation [J]. ChemicalEngineering Science,2001,56 (7):2521-2530
[11]尹周澜,刘吉波,张平民等.氧化铝生产种分过程Rpeq的测定及其与降温制度的关系[J].中国有色金属学报,2001,11(6)：1136-1139
[12]张江峰,李旺兴,尹周澜等.铝酸钠溶液晶种分解附聚过程主要影响因素研究[J].轻金属,2004,(9)：17-19,26
[13]张樵青.对拜耳法高浓度铝酸钠溶液两段分解细晶种附聚的研究[J].轻金 属,1994,(4),5-9
[14]周辉放,杨重愚.铝酸钠溶液中不同粒度晶种的附聚行为[J].铝镁通讯,1992,2(4),12-15
[15]H. Watling, J. Loh, H. Gatter. Gibbsite crystallization inhibitionl Effects of sodium gluconate on nucleation, agglomeration andgrowth[J]. Hydrometallurgy,55 (2000),275-288
[16]I.Seyssiecq, S. Veller, etc. Agglomeration of Gibbsite Al (OH) 3crystals in Bayer liquors Influence of the process parameters[J]Chemical Engineering Science,1998:53 (12),2177-2185
[17]陈国辉,陈启元,尹周澜等.铝酸钠溶液种分成核和附聚研究进展[J].湿法冶金,2003,22(1)：14-17
[18]张俊,张平民,陈金清等.粒度分布信息在铝酸钠溶液加晶种分解动力学研究中的应用[J].广东有色金属学报,2003,13(1)：21-26
[19]张存兵,赵萍.拜耳法种分氢氧化铝粒度“两极分化”探讨[J].轻金属,1999,9：17-20
[20]Scott J. Extractive Metallurgy of Aluminum vol 1,Aluminum,NewYork,1962,237
[21]张玉明.砂状氧化铝生产分解降温的新技术[M].山东铝业公司科技创新文集,2000,5：153-155
[22]陈建华.我国氧化铝工业进十年来的技术进步及今后的发展方向[J].轻金属,2002,(10)：3-7
[23]谢雁丽.铝酸钠溶液晶种分解[M].北京：冶金工业出版社,2003.37
[24]傅崇说.有色冶金原理[M].北京：冶金工业出版社,1993：154-157
[25]李洁.过饱和铝酸钠溶液结构及分解机理的研究[D].长沙：中南大学,2002
[26]M uralidar R, Ramkrishna D. A n Inverse Problem in A g2glomeration Kinetcs[J]. J Colloid Interface Sci,1985,112 (2):348-361
[27]Scott J. Extractive M etallurgy of A lum inium [M]. N ew York,1963:203-218
[28]毕诗文,薛红,杨毅宏等.拜尔法铝酸钠溶液分解动力学[J].中国有色金属学报,1998,8(1)：131-134
[29]王延明译.铝酸钠溶液中氢氧化铝二次结晶形成机理[J].《轻金属》,1990,(4)：16-19
[30]陈肖虎,程立,赵莉.砂状氧化铝生产过程实验研究[J].贵州工学院学报,1994,23(6)：65-69
[31]周辉放,杨重愚,陈光渊.铝酸钠溶液中晶体附聚机理研究[J].有色金属,1994,46(4)：54-58
[2]杨重愚.氧化铝生产工艺学[M].冶金工业出版社,1991
[3]陈谦德,李小斌译.碱法综合处理含铝原料的物理化学原理[M].中南工业大学出版社,1998
[4]李小斌,龙远志,杨重愚等.铝酸钠溶液晶种分解动力学初步研究[J].轻金属,1988,(11)：10-13
[5]王天庆.拜尔法铝酸钠分解降温工艺的改进实践[J].轻金属,2004,10(5)：5-7
[6]周秋生,李小斌,彭志宏等.高浓度铝酸钠溶液晶种分解动力学[J].中南大学学报,2004,35(4)：557-560
[7]王雅静,翟玉春,田彦文等.苛性比对铝酸钠溶液结构和性质的影响[J].东北大学学报,2003,24(4)：774-776
[8]陈启元等.有色金属基础理论研究(新方法与新进展)[M].科学出版社
[9]L I J un, PRESITIDGE C A, ADDAI2MENSAH J. The influenceof alkali metal ions on homogeneous nucleation of Al (OH) 3 crystalsfrom supersaturated caustic aluminate solution [J]. Journal of Col2 loid and Interface Science,2000,224 (2):317-324
[10]IL IEVSKI D, RUDMAN M, METCAL FE G The separate rolesof shear rate and mixing on gibbsite precipitation [J]. ChemicalEngineering Science,2001,56 (7):2521-2530
[11]尹周澜,刘吉波,张平民等.氧化铝生产种分过程Rpeq的测定及其与降温制度的关系[J].中国有色金属学报,2001,11(6)：1136-1139
[12]张江峰,李旺兴,尹周澜等.铝酸钠溶液晶种分解附聚过程主要影响因素研究[J].轻金属,2004,(9)：17-19,26
[13]张樵青.对拜耳法高浓度铝酸钠溶液两段分解细晶种附聚的研究[J].轻金 属,1994,(4),5-9
[14]周辉放,杨重愚.铝酸钠溶液中不同粒度晶种的附聚行为[J].铝镁通讯,1992,2(4),12-15
[15]H. Watling, J. Loh, H. Gatter. Gibbsite crystallization inhibitionl Effects of sodium gluconate on nucleation, agglomeration andgrowth[J]. Hydrometallurgy,55 (2000),275-288
[16]I.Seyssiecq, S. Veller, etc. Agglomeration of Gibbsite Al (OH) 3crystals in Bayer liquors Influence of the process parameters[J]Chemical Engineering Science,1998:53 (12),2177-2185
[17]陈国辉,陈启元,尹周澜等.铝酸钠溶液种分成核和附聚研究进展[J].湿法冶金,2003,22(1)：14-17
[18]张俊,张平民,陈金清等.粒度分布信息在铝酸钠溶液加晶种分解动力学研究中的应用[J].广东有色金属学报,2003,13(1)：21-26
[19]张存兵,赵萍.拜耳法种分氢氧化铝粒度“两极分化”探讨[J].轻金属,1999,9：17-20
[20]Scott J. Extractive Metallurgy of Aluminum vol 1,Aluminum,NewYork,1962,237
[21]张玉明.砂状氧化铝生产分解降温的新技术[M].山东铝业公司科技创新文集,2000,5：153-155
[22]陈建华.我国氧化铝工业进十年来的技术进步及今后的发展方向[J].轻金属,2002,(10)：3-7
[23]谢雁丽.铝酸钠溶液晶种分解[M].北京：冶金工业出版社,2003.37
[24]傅崇说.有色冶金原理[M].北京：冶金工业出版社,1993：154-157
[25]李洁.过饱和铝酸钠溶液结构及分解机理的研究[D].长沙：中南大学,2002
[26]M uralidar R, Ramkrishna D. A n Inverse Problem in A g2glomeration Kinetcs[J]. J Colloid Interface Sci,1985,112 (2):348-361
[27]Scott J. Extractive M etallurgy of A lum inium [M]. N ew York,1963:203-218
[28]毕诗文,薛红,杨毅宏等.拜尔法铝酸钠溶液分解动力学[J].中国有色金属学报,1998,8(1)：131-134
[29]王延明译.铝酸钠溶液中氢氧化铝二次结晶形成机理[J].《轻金属》,1990,(4)：16-19
[30]陈肖虎,程立,赵莉.砂状氧化铝生产过程实验研究[J].贵州工学院学报,1994,23(6)：65-69
[31]周辉放,杨重愚,陈光渊.铝酸钠溶液中晶体附聚机理研究[J].有色金属,1994,46(4)：54-58