| 摘要 |
<p>A method of making sintered aluminous abrasive particles comprises:
<UnorderedLists id="ula01" listStyle="none"><ListItem>mixing a quantity of uncalcined bauxite and sulphuric acid to dissolve the acid-soluble portion thereof and form principally aluminium sulphate hydrate;</ListItem><ListItem>calcining the aluminium sulphate hydrate to separately form gamma alumina and sulphur trioxide;</ListItem><ListItem>forming the gamma alumina into an unfired body;</ListItem><ListItem>breaking the unfired body into granules; and</ListItem><ListItem>sintering the granules to convert the gamma alumina granules into sintered abrasive aluminous material of alpha alumina.</ListItem></UnorderedLists></p> |
