... adjustable main engine ratate-speed Mineral powder briquetting machineis mainly used to press the mineral powder which are difficult to ... used for anhydrous materials of non-ferrous and ferrous mineral powder briquette /ball making system before the smelting furnace ... , mgo power, copper power, chrome ore power, Lead Zinc Ore, steel slag, aluminum ash, Si-Mn mineral powder, bauxite refractory ...