Roll-press briquetting helps chemical/mineral processors squeeze more value from materials, improve handling

摘要

In many chemical and mineral processing industries, once money has been invested both In mining (or buying) the raw material and in the equipment and energy needed to prepare it for sale discarding fines will not only waste part of that investment but might even add further cost in transportation and possibly dumping charges. So the question becomes, how can fines be turned into a revenue-generating asset? One answer arises in the example of quicklime processing.When limestone (CaO_3) is calcined in rotary kilns to produce quicklime (CaO), it is not unusual for 10 percent to 20 percent of the stone to abrade and emerge from the kiln as quicklime fines (-1/4 in.). While there are various industrial processes that can use fines, handling and shipping are tricky and dangerous. Due to the highly caustic nature of quicklime, airborne dust easily burns eyes and skin.