| 摘要 |
A method of manufacturing a pelletised mineral product, the method comprising: in a first mixing step, forming a first mixture by mixing the evaporite mineral with non-gelatinised starch under conditions that are insufficient to substantially gelatinise the starch 5; in a second mixing step, forming a second mixture by mixing the first mixture under conditions that are sufficient to substantially gelatinise the starch comprised within the first mixture 7; and forming the second mixture into pellets 8. Preferably the evaporite mineral is polyhalite. In one embodiment the first mixing step is performed substantially in the absence of water, and the second mixing step is performed in the presence of free water such as steam or vapour. The second mixing step may also comprise applying heat to the first mixture. Also claimed is a pelletising plant configured for the performing the method of manufacturing the pelletised mineral product. |
