| 摘要 |
<p>A method of reclaiming gypsum materials. The method comprising heating the used material to a temperature between 220 and 240 °C to form soluble anhydrite. Quenching the anhydrite and retaining in an aqueous solution until dihydrate is formed. Where the material is plaster of paris, the dihydrate is subsequently heated to form the hemihydrate.</p> |
