... from 25-60mm 2.High strength of the finished coal balls 3.ISO9001 approved 1. Briquetting Press Machine Characteristics:The machine ... rollers , so the products have the three high characteristics : high density ,high strength ,high hardness,Because of the mandatory squeeze rollers, so ... effect. Loose on the local materials, such as coke, iron skin, dust powder effects of sludge and other materials is ...