1. Main technological characteristics Modern techniques, reliable quality, multi-function, strong pressure. The machine is suitable for the large, medium and small enterprise which set up the production line with certain production scale. Structure form: Four rollers pressing, spiral pressing, hydraulic pressure. 2.advantages This type of briquette machine shows the advantages of well-distributed grain,strong reactivity, good thermal stability and sulfur smoke, which are popular with a lot of public citizens, especially the fertilizer manufacturers. The production cost will be greatly reduced after equipping this type of machine. We strongly believe that with the characteristics of inexpensiveness and practicability, the machine will, undoubtedly, become one of promising substitutes of coal energy.