... during production of briquettes, so the briquettes are stronger and in higher density, also the surface is smoother.Suitable materials for ... , fireproof materials, Desulfurization gypsum, Dolomite, etc.Request for raw materials:1. In order to ensure the good quality and machanical strength of ... the machine is maintained below 3mm, preferable in the range of 30-40% small than 1-2 mm, with no more than ...