... economic 3.Free of smoke and Peculiar smell Double-roll type pressing briquette machineSpecfications:1. High forming rate and output ... suppress coal,iron,coke,aluminum powder,iron,iron oxide skin,toner,toner,slag,gypsum,tailings,sludge,kaolin,activated carbon, coke powder ... of domestic and international markets for all coal ball type pressure machine series carried out in accordance with international ...