Working Principle
The experimental horizontal rod-pin nanoparticle mill is a horizontal, continuous production ultrafine particle disperser. Its working process involves using a pump (pneumatic diaphragm pump, screw pump, gear pump, rotor pump, etc.) to input the pre-dispersed and wetted solid-liquid mixture into the grinding chamber. The grinding chamber is filled with an appropriate amount of grinding media. The high-speed rotation of the dispersing blades imparts sufficient kinetic energy to the grinding media, causing irregular relative motion between the material and the grinding media within the grinding chamber. The material is primarily subjected to centrifugal force and pressure between the media, resulting in stress field generation through impact, friction, and shearing. When the stress exceeds the material's yield stress or fracture limit, the particles undergo plastic deformation or fracture, achieving the purpose of grinding the material and dispersing aggregates. A special separation device then separates the ground and dispersed material from the media and discharges it from the outlet.
Grinding Mechanism
1. The grinding media, accelerated by the rotor's rotation, moves towards the inner wall of the grinding drum. The grinding media moving towards the drum wall collides with the grinding media or materials adhering to the inner wall, resulting in dispersion and breakage of the materials.
2. Under centrifugal force, the materials adhering to the inner wall of the grinding drum are dispersed and broken by the pressure and shear force of the adjacent media.
3. Due to the varying distances of the grinding media from the shaft center, different velocities are obtained, creating velocity differences. Collisions occur during this process, causing material breakage.
4. In the initial stage of grinding, the particle size is relatively large, and impact crushing plays a major role. As the grinding time increases, the materials gradually become finer, and frictional shear crushing primarily occurs within the grinding drum.
Product Features
1. Simple structure, low failure rate, specifically designed for R&D, suitable for formula technology verification and challenging academic research in universities, research institutions, and enterprise laboratories.
2. Performance and capacity can be scaled up proportionally, accurately scaling from small-scale trials to large-scale production for industrialization.
3. Represents an advanced level of wet grinding technology experimentation.
4. Compatible with experimental requirements for the process performance of various solvent formulations and novel materials.
5. Flexible material replacement for the grinding cylinder; different core structural components can be selected based on different materials (no pollution, minimal wear). Optional materials include tungsten carbide/polyurethane/zirconia/silicon carbide/silicon nitride, etc.
6. Grinding media materials can include zirconia, alumina, silicon nitride, stainless steel balls, etc.
Equipment Structure
This equipment consists of a frame, transmission system components, grinding components, sealing system and components, cooling system components, feeding system components, electrical control system components, intelligent program, and auxiliary structural components.
1. Touchscreen: Siemens 7-inch touchscreen, integrated with a PLC for unified equipment control, allowing for targeted process parameter settings for specific materials.
2. Motor: 1.1KW power, 2875r/min speed, the main power source for grinding.
3. Electric Agitator: 120W power, 3000r/min speed, timer 0-120min/normally on, used to disperse slurry and prevent agglomeration and sedimentation.
4. Material Tank: 1L capacity, all 304 stainless steel, jacketed, with circulating coolant for cooling.
5. Grinding Chamber: The grinding working part of the equipment. The rotor and grinding cylinder can be made of materials suitable for the customer's material characteristics, including alumina, zirconium oxide, silicon carbide, silicon nitride, polyurethane, etc. It is jacketed and can be cooled by circulating coolant.
Application Areas
This series of products has wide applications, suitable for ceramic inks, thermal transfer inkjet printing, nano-pigments, magnetic materials, lithium iron phosphate, pharmaceuticals, electronic pastes, alumina materials, zirconium silicate materials, non-metallic mineral powders, cosmetics, and other new nanomaterials.
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