Nov 01, 2018 Following on, the precise sizing of the material is undertaken using sizer screening decks. The smaller the diameter of the screens the slower the production, but the more accurate the screening. There are many types of screening meshes available, all designed to process aggregate based on the specific properties of the material and its final use. CRUSHING / SCREENING / WASHING. The said materials are Crushed and Ground by the primary jaw crusher, secondary and tertiary cone crushers. The quality of the finished material used, the setting of the cone, turnover speed, flow rate control, etc. All these operations can be repeated until the required product quality has been achieved.