How to Choose the Right Sand Mill and Grinding Media
FRANLI sand mills are widely used in coatings, inks, pesticides, dyes, inkjets, functional ceramics, nano-powders, food, batteries, and other industries. The sand mill is mainly composed of a motor, a transmission device (such as a hydraulic coupling), the main shaft, a grinding cylinder, a dispersion device, a separation device, a feeding system, a shaft seal, a frame, a running protection device, and a grinding and dispersing medium. The operation protection of the grinding machine can be realized by the micro-intelligent electronic technology of relay and programmable controller.
Details of Sand Mill
- low grinding fineness
- Wide range of applications
- high working efficiency
Application: Paint, Adhesive, Battery, Pharmaceutical industry, Cosmetic
Sand mills for coatings are mainly divided into four categories: vertical, horizontal, basket, and special-shaped sand mills. Vertical and horizontal sand mills can be divided into open or closed dispersing disc sand mills; rod pin or conical annular sand mills; and dispersing disc horizontal sand mills and horizontal rods Pin or horizontal conical annular sander. When many people choose a nano-sand mill, the first thing they think of is the fineness requirement. The fineness of the nano-scale requires our FRANLI to reach about 50nm. Then there is the issue of service life.
Choice of sand mill
Then when choosing the barrel material of the nano sand mill, choose stainless steel (of course, special materials can be selected from special materials, such as ceramics), to prevent corrosion and be durable. Of course, we must also look at the mechanical sealing condition, nano sanding The mechanical seal circulating fluid of the machine can reduce the damage to the product caused by air pollution; for the material of the grinding barrel rotor, there are two types, one is a disc type grinding disc, and the other is a pin type grinding disc. Yes, it mainly depends on your choice of grinding thickness.
The media and materials to be ground should be selected according to what you want to produce. The horizontal nano-sand mill is an interval separation device so that the material and the grinding medium can be separated and operated; as long as the design of the nano-sand mill is reasonable, the production efficiency is very good; check the convenience of changing zirconium beads and whether the design is reasonable; of course, the important thing is whether the safety protection settings are safe.
Grinding Media for Sand Mills
The amount of grinding media used in the sand mill is related to the viscosity of the material, all of which need to be obtained through experiments. There are different standards for the amount of grinding media used in nano-sand mills with different structures. Usually, bead size adaptation suggestions will be provided according to the material before purchasing the equipment, which can be adjusted according to different materials.
Mass measurement method = sand mill effective volume x filling rate (75-85%) x medium bulk density. In short, if the filling rate of the grinding medium is too high, it is easy to cause the temperature rise of the sand mill to be too high or the outlet to be blocked. The filling rate of the grinding medium is too low, the grinding efficiency is low, the wear is aggravated, and the grinding time is prolonged.
The larger the specific gravity of the grinding medium, the greater the kinetic energy and the higher the grinding efficiency. Steel balls with a diameter of 1.6-2.5mm are generally used in the production of offset printing inks, while zirconia beads with a diameter of 0.3-0.8mm are used in abrasive inkjet inks.
Filling amount of grinding media in sand mill
When the filling rate of the grinding medium of the horizontal sand mill increases from 40% to 75%, the running current curve shows an upward trend, reflecting that the grinding medium in the sand mill is fully agitated, and the energy demand changes greatly; the filling rate is 75%-85%, the running current curve changes smoothly, reflecting that the medium in the sand mill has reached an equilibrium point, the energy demand is stable, the filling rate is greater than 85%, and the running current curve changes in a downward trend, reflecting that the grinding medium in the sand mill is excessive, and the grinding medium and There is a sliding phenomenon between the dispersing discs, the dispersing discs cannot drive the grinding media to move, and the energy requirement is reduced. Therefore, according to the current change curve of the horizontal sand mill, the suitable filling rate of the grinding medium is 80%.
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Guidelines For Sand Mill
The sand mill mainly uses friction, shearing, and collision as effective grinding methods. It is one of the grinding equipment currently applicable to a wide range of material particle sizes and has high grinding efficiency. The energy density per unit volume is large. The control system can complete the continuous grinding and continuous discharging of the slurry, which greatly improves the production efficiency of the sand mill. It has the advantages of high energy density, fine product granularity, small environmental pollution, simple equipment structure, and convenient maintenance.
Sand mills, also known as bead mills or media mills, are mechanical devices used in the field of grinding and dispersion.
The vertical sand mill is a nano-sand mill whose grinding cylinder adopts a suspended structure, raw materials enter from the bottom and discharge from the top.
Vertical sand mills and horizontal sand mills are commonly used equipment for grinding in paint, coating, ink, and other industries. They all rely on the high-speed rotation between the grinding medium and the material for grinding work.
The sand grinding machine, also known as the pearl grinding machine, is used to grind the paint of the pigment with hard wear -resistant beads, glass balls, etc. in a closed cavity.
Sand mills are mainly used in industrial fields such as paint coatings, cosmetics, food, daily chemicals, dyes, inks, pharmaceuticals, magnetic recording materials, ferrites, photosensitive films, oxide ceramics, and new energy.
Sand mill is a kind of high-efficiency grinding equipment, which is mainly used for grinding materials, and the particle size of the final grinding can reach the nanometer level.