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The reasonable planning of the ball mill grinding body is mainly determined according to the physical chemical properties, polishing methods of the powder material, the function of the product, and the product requirements of the product, mainly the following eight basis:
1, into the grinding material granularity . When the steel ball is loaded, the small steel ball is larger than the large surface area of \u200b\u200bthe large steel ball, and the opportunity to contact the material, and the energy of a single large steel ball is large, and the impact is large. The average particle size of the powder grinding is large, the hardness is large, and the average scaller selected by the steel ball should be large, and it should be somewhat small. The mill is small, and the average steel ball is also small.
Further, the raw material grinding the steel ball average scalpets of cement grinding.
2, easy milling of the material. It is easy to wear the material to make a small steel ball; the generous wear is poor, and the big steel ball must be selected.
3, the inner unit volume material passes. The size of the steel ball is also used to have a certain relationship with the volume of the grinding unit volume material. When the closed circuit grinding, the retraction of the polishing machine increases the volume of the inner unit volume material, so that the steel ball is subjected to a certain buffer, the amount of recirculation is large, so the diameter of the steel ball should be selected. Some, it is ointment.
4, the fineness requirements of abrasive materials. When the fineness of the abrasive material is fine, the small steel ball should be selected appropriately.
5, single coal mills generally use steel balls without a steel segment; two coarse mills are generally in front of the steel ball, and the warehouse is used.
6, the grinding body must be matched, the specifications of the steel ball are usually 3-5, and the steel sections are generally 2-5.
7. The proportion of steel balls at all levels can be coordinated in two small and middle principles. When using two steel sections, it can take half.
8, under the premise of satisfying material granularity requirements, the average particle size should be as small as possible to increase the number of contact area and unit time, the diameter and length of the steel segment is small, because The radial wear is fast, the difference between the length of the steel section and the diameter should be 5 mm.
