Development Trend Of Abrasive Media

Development trend of abrasive media

Grinding media market There are a variety of grinding balls (beads), how to recommend suitable media and users themselves how to choose the best media, has become a grinding industry can not be ignored. This paper tries to expound the following points from the market orientation: the smaller the particle size

Grinding equipment from the world's first use of a large particle size grinding ball of the stirring type Ball mill (Attritor) was born, development to the use of small particle size grinding beads vertical sanding machine, horizontal sanding machine and a variety of improved functions of ultra-fine grinding of a new generation of abrasive grinding machine, the use of grinding medium particle size is becoming smaller. There are two main reasons: the final fineness of material grinding micron:

As the material in the grinder is through the contact of the grinding medium in the movement to cut, collide and grind, the smaller the particle size of the abrasive medium and the more the contact point in the unit volume, the higher the grinding effect and the smaller grinding fineness. For example, a brand size of 2mm zirconium silicate beads, about 20,000 per liter, and the particle size of 1mm particles reached about 80,000, the latter is 4 times times the former. When using a larger size zirconium bead to grind a product, no matter how many sand grinding, the particle size of the material always fails to reach the required fineness, and when the particle size is smaller, the effect is obviously improved. Improvement of separating device of sand mill using ultrafine grinding beads is possible:

The minimum abrasive bead size allowed is an important index to measure the quality grade of sand mills. Each revolution in the design and fabrication of the separation device has brought a leap in the use of abrasive beads to smaller particles. Apart from the static traditional flat Nickel network to the Johnson network with triangular beams and to the dynamic ring separator and the sleeve type Cartridge net, the particle size of the abrasive media can be used more and more in addition to the service life, while the material flow is not obviously affected. The smallest bead used by the representative of the sleeve type Cartridge net (such as the premier of the United States of America) reaches 0.2mm; The representative of the ring separator (such as the Swiss Dyno-Mill laboratory type) can also reach 0 by bead size. 2mm. And the Swiss Buhler company began to develop a centrifugal separation device, so that the separation principle from the distinction between bead size to distinguish the size of bead density, and the minimum size of grinding beads to a new limit. The larger the proportion of the

From table 1, we can see that the proportion of common abrasive beads such as glass beads, mian, zirconium silicate beads, zirconia beads (pure zirconium beads) and chromium-steel beads increases in turn, and their hardness, compressive strength and wear resistance are also increased in turn in addition to chrome steel beads. From the kinetic formula, it is P Mv that the bead's impulse p is proportional to the quality m of the bead, the greater the density of the bead is, the greater the energy is, and the higher the grinding efficiency is.

Because of the high toughness of inorganic pigments (such as carbon black, phthalate, iron oxide, etc.) need ultra-fine grinding, coupled with the pursuit of higher grinding efficiency and ideal gloss, the use of high-density grinding beads has become a solution. and sanding mill manufacturers have also cooperated with this request, there are two main reasons to make it possible: Table 1: Common grinding beads comparison of kinds of glass bead beads zirconium silicate beads zirconia pearl steel Beads

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