When processing hard wheat with small flour processing equipment, the slag grinding process of "clearing powder first, then adding slag" is usually adopted. The main characteristics of this process are wide range of flour cleaning, high extraction rate of first-class high-quality coarse grains, uniform quality of materials into slag mill, low grinding turnover rate, which are suitable for processing wheat with high hardness. The disadvantage is that the cleaning equipment is used a little more, the slag grinding materials are not selected, and the role of slag grinding is not fully played.

小型面粉加工设备加工软质小麦时，可采用“先入渣。后清粉”的站流程，该流程的主要特点是充分发挥了渣磨系统的作用，清粉范围稍窄，清粉机使用数量较少，适合加工软质小麦。缺点是渣磨物料的质量不均匀，小型面粉机周转率高，一等品质的粗粒提取率稍低。

When small flour processing equipment is used to process soft wheat, it can use "slag first". The main characteristics of this process are that it gives full play to the role of slag grinding system, the scope of cleaning is slightly narrow, and the number of cleaning machines is less, so it is suitable for processing soft wheat. The disadvantages are that the quality of slag grinding materials is not uniform, the turnover rate of small flour machine is high, and the extraction rate of first-class quality coarse grains is slightly low.

提取高质量面粉时，通常采用“先清粉，后入渣，再清粉”的渣磨系统，该流程的主要特点是不仅充分发挥了清粉系统的作用，而且充分挖掘渣磨系统的潜力，尽可能多提取一等品质的粗粒、粗粉，该工艺有能力提取数量较多的阿高精度面粉。缺点是清粉机使用台数较多，操作管理要求稍高。渣磨平筛中分级筛的选配是根据平筛的流量、筛理物料的特性和达到制粉流程流量平衡的要求而决定的。

When extracting high-quality flour, the slag grinding system of "first cleaning, then slag, then cleaning" is usually used. The main feature of this process is that it not only gives full play to the role of the cleaning system, but also fully exploits the potential of the slag grinding system to extract as many first-class quality coarse grains and coarse flour as possible. This process has the ability to extract a large number of high-precision flour. The disadvantage is that the number of cleaning machines used is more, and the operation and management requirements are slightly higher. The selection of grading screen in slag grinding flat screen is determined by the flow rate of flat screen, the characteristics of sieving materials and the requirement of flow balance in pulverizing process.