Our briquette machine are rollers pressing type. This type of briquette presses can apply higher pressures and thus produce higher density briquettes . These briquettes can be designed of oval shape, egg shape, pillow shape, square shape etc. This machine is widely used in coal industry and metallurgy industry. raw materials request: A: Coal/coke/charcoal powder. B: Metal powder: Iron powder, magnesium oxide powder, copper powder, chromium ore, lead, zinc scrap, bauxite, nonferrous metal powder, silicon manganese alloy powder etc. C. Mineral powder: aluminum powder, toner, gypsum, sludge, desulphurization gypsum powder etc