Abstract
Alumina powder is one of the most important raw materials of ceramic membrane support. The study is mainly about optimizing wet ball grinding conditions using alumina powder with size of 500 meshes as raw materials according to the needs of powder preparation, comparing grinding results on the different conditions including grinding time and the ball-to-powders ratio. Experimental results show that the best condition is that the ball-to-powders ratio of (9~11):1 and the best grinding time of 9~10 h. The subsequent experiments indicated that the powder milled on the best wet ball grinding conditions can be sintered directly into ceramic membrane support having high temperature resistance and high mechanical strength.
Highlights
Membrane separation technology and its application developed rapidly in recent years, as one of the most important inorganic membrane separation technology, ceramic membrane has been widely used in environmental protection, food, chemical, pharmaceutical and biological engineering industries
The size and the distribution of size of raw material powder have direct effect on support quality and reducing costs of support has been becoming the focus field in ceramic membrane support preparation recently (Qi et al, 2011; Xing et al, 2009), so it is very important to prepare suitable powder meet the needs of ceramic membrane support sintering with the lower cost
Sphericity of particles making by dry ball grinding method is better than making by wet ball grinding method, but dry ball grinding method is of high energy consumption and low efficiency (Su, 2001; Zhang et al, 2007; Wang and Chen, 2000)
Summary
Membrane separation technology and its application developed rapidly in recent years, as one of the most important inorganic membrane separation technology, ceramic membrane has been widely used in environmental protection, food, chemical, pharmaceutical and biological engineering industries. The size and the distribution of size of raw material powder have direct effect on support quality and reducing costs of support has been becoming the focus field in ceramic membrane support preparation recently (Qi et al, 2011; Xing et al, 2009), so it is very important to prepare suitable powder meet the needs of ceramic membrane support sintering with the lower cost. The purpose of this study is to research the best grinding condition which is probably having significant influence on the milling effect such as grinding time and the ball-to-powders ratio (Zhang and Liu, 2005) by wet ball grinding method, evaluating the results of the experiment according to particle size and size distribution of the milled powder
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