Working principle and application of horizontal sand mill

Horizontal sand mill is an efficient and continuous wet ultrafine grinding and dispersing equipment, widely used in multiple industrial fields, especially suitable for production scenarios with high requirements for material fineness, uniformity, and stability.

Main application areas

1. Coatings and paint industry

Horizontal sand mills play a key role in the production of automotive paint, wood paint, industrial paint, etc. They can grind pigment particles to the micrometer or even nanometer level, improving the smoothness, covering power, and glossiness of paint films. Its high efficiency and stability make it the preferred equipment to replace traditional three roll machines.

2. Ink and colorant manufacturing

Suitable for fine dispersion of gravure printing ink, UV curable ink, water-based ink, and color paste. Through high-strength shear action, pigment aggregates are effectively broken, ensuring bright ink colors, good fluidity, and no graininess.

3. Processing of new energy materials

Grinding of lithium battery slurry: used for homogenization treatment of positive electrode materials (such as lithium iron phosphate) and negative electrode slurry, achieving a fineness requirement of D50 ≤ 200nm, and improving battery energy density and cycle life.

Electronic paste and ceramic materials: In the production of MLCC (multilayer ceramic capacitors), the silver paste particle size is controlled at the nanometer level to ensure electrode printing accuracy.

4. Production of pesticides and suspensions

The particle size directly affects the efficacy and suspension stability of water suspended pesticides, seed coating agents, and other formulations. Horizontal sand mills can significantly reduce particle size (<3 μ m), improve viscosity and physical stability, and prolong the efficacy period.

5. Biopharmaceuticals and Cosmetics

Liposomal drug carrier: Achieve nanoscale particle size control under sterile conditions, with a CV value<10%, ensuring consistent drug release.

Cosmetic lotion and creams: used for powder dispersion, to improve product fineness and skin feel, and to avoid particle feeling.

6. Nanomaterials and Functional Materials

Suitable for the preparation of high value-added materials such as nano thermal insulation coatings, carbon nanotube dispersions, hydroxides, permanent magnet materials, etc., supporting continuous production in the range of 50-500nm.

7. Food and Beverage

Used for grinding high viscosity materials such as chocolate syrup and fruit juice suspensions, improving taste and storage stability, and extending suspension time.

8. Other industrial sectors

It also includes industries such as dyes, magnetic powders, ferrites, papermaking, photosensitive films, electronic pulp, etc., covering almost all non-metallic minerals and fine chemical fields that require wet ultrafine grinding.

working principle

The horizontal sand mill adopts a grinding cylinder placed horizontally, and the material and grinding medium (such as zirconia beads, glass beads) move together in a closed chamber. The dispersing disk or rod pin structure on the motor driven spindle rotates at high speed, driving the grinding medium to form eddy currents, causing the particles in the material to be crushed and dispersed under multiple mechanical forces.

The entire process is continuous wet grinding:

Feed: Pre dispersed slurry enters the grinding chamber through a pumping system;

Grinding: Under the action of high-speed rotating dispersing elements, the grinding medium collides and shears violently with the material;

Separation and discharge: The fine particle slurry after grinding is separated from the grinding medium through a dynamic separator (such as a gap screen) and discharged from the discharge port. Particles that do not meet the standards continue to be circulated for grinding.

Key structural components

Grinding cylinder: Horizontal layout, built-in cooling jacket, can be controlled by water to prevent thermal sensitive materials from deteriorating.

Dispersion device: including disc, rod pin or conical rotors, directly affecting shear strength and grinding efficiency.

Dynamic separation system: using a slotted screen or LDC grid separator to ensure that the grinding medium does not leak and allows fine slurry to pass through.

Sealing system: Double end mechanical seal design effectively prevents leakage of high viscosity materials and improves equipment stability.

Cooling and control system: equipped with jacket cooling and PLC automatic control, real-time adjustment of temperature, pressure, flow and other parameters to ensure continuous and stable production.