Grinding sand mill medium

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  Sand mill grinding medium is one of the important factors affecting the efficiency of sand mill. So when in use must pay attention to. Sand mill is called a sand mill for grinding media is the earliest use of the natural sand, in foreign countries, until now still make the natural sand. This natural sand is through screening, early references with 20 ~ 40 better. But the current grinding media can be used to minimize 0.1mm.
  At present in our country are using glass beads, steel ball, zirconium silicate beads, zirconia beads, pure zirconia as the grinding medium sand mill, including glass bead density with metal species in the glass composition vary, but the selection must not only consider the glass strength and density, but also should consider whether the glass composition a toxic metal (such as lead), otherwise the grinding material will be pollution affect quality.
  Zirconium silicate beads for different density and the conditions of use, the "melting" and "sintering" two process, its internal microcrystal structure uniform and meticulous, with grinding effect is very ideal, each performance index has reached the international advanced level. Mainly used for grinding carbonate, kaolin, titanium pigment, paint, paint, ink and other industries.
  Zirconia beads
  Is micron and nanoscale materials, made of advanced technology, the technical indexes and performance reached the international advanced level.
  Superfine grinding material is mainly applied to the requirements of "zero pollution" and high viscosity, high hardness and dispersion, such as: electronic ceramics, magnetic materials, oxide, silicon oxide, zirconium silicate, titanium dioxide, pharmaceutical food, pigments, dyes, inks, special chemical industry.
As for the grinding sand mill medium shape, because it is running at a high speed, almost all agree on the best spherical or nearly spherical. The abrasive sand mill is still the impact and shear stress, so if the grinding medium density bigger, so the same size of grinding media, these two forces will be larger, sanding effect will be better.
  Sand mill grinding medium is the same amount of the abrasive slurry viscosity, the slurry temperature, therefore the determination of grinding medium dosage must consider these factors. The general principle is the viscosity of slurry, grinding medium dosage should be less, viscosity hours grinding medium amount can be a little more.
  For horizontal sand mill, grinding medium dosage can start from the simplified volume 75%, then according to the material discharging temperature or cooling water
  The temperature to increase or decrease the amount of grinding medium, generally speaking, when the temperature exceeds the allowable range, it should reduce the grinding medium dosage, temperature is lower than the allowable range, before increasing the rotor speed, priority will be given to increase the amount of grinding medium. Usually the grinding slurry discharge temperature can be allowed in 50 ~ 70 ℃ is the. Adjust the medium dosage can use this scale to measure slurry, for some poor stability should pay attention to the control.