There are many factors that affect the fineness of the bead mill
There are many factors that affect the fineness of the bead mill
There are many factors that affect the fineness of the bead mill, which can be mainly from the aspects of external reasons and internal reasons.
First, external reasons
1. The addition of dispersant
In the bead mill, the crushing of the material particles first mainly relies on the collision, extrusion and shear between the grinding beads of high-speed movement to achieve the particle size of the material particles to become smaller and the specific surface area to increase. In the process of gradual refinement of the particle size, the particles will reunite under the influence of van der Waals force and electrostatic action of double electric layers. Therefore, it can be considered that after ultrafine particle grinding to a certain extent, accompanied by a series of particles on the physical and chemical properties of the qualitative change, there will be a reversible process of "crushing reunion". When the speed of the positive and negative processes is equal, the dynamic balance in the crushing process is reached, and the particle size reaches the limit value. At this point, further extension of the grinding time is futile. Because the mechanical force at this time is not enough to depolymerize the aggregate so that the particles are further broken, can only be used to maintain the comminution balance, and may cause more small particles to aggregate, so the so-called "reverse grinding", "back coarse" phenomenon will appear. To some extent, the appropriate choice of dispersant is an effective way to solve the phenomenon of "reverse grinding" and "back coarsening". Dispersant can affect the van der Waals force between particles, the electrostatic force of double electric layer, the space repulsion of solvated film and adsorption layer.
Therefore, the selection of dispersant in the ultrafine grinding process is a complex and difficult project, must consider all aspects of the factors, only to ensure that the dispersant has no impact on product performance and system, choose the appropriate dispersant and its dosage, reduce the soft aggregate between the particles in the ultrafine grinding slurry, so that the particles in the system dispersion stability, The grinding fineness of the sand mill can be achieved.
Two, internal reasons
The structure and technical design of the bead mill itself. As a kind of ultra-fine grinding equipment with high efficiency and energy saving, the sand mill has developed rapidly in recent ten years. However, the equipment produced by different manufacturers are different, and the grinding fineness of the equipment produced by the same manufacturer is not the same.
Rucca N series bead mill is a new generation of grinding equipment, using a new design of centrifugal separation device, with large flow, smooth discharge and other advantages. The equipment can use more than 0.1mm grinding medium, and adopts double cooling mode, which effectively reduces the heat generated during grinding and ensures the grinding effect and production efficiency.
Rucca N series bead mill is suitable for grinding all kinds of ceramic materials, as well as other nano-level materials. The equipment adopts advanced grinding technology to ensure that the material after grinding reaches the nanometer level to meet the needs of various applications.
There are many factors that affect the fineness of the bead mill, which can be mainly from the aspects of external reasons and internal reasons.
First, external reasons
1. The addition of dispersant
In the bead mill, the crushing of the material particles first mainly relies on the collision, extrusion and shear between the grinding beads of high-speed movement to achieve the particle size of the material particles to become smaller and the specific surface area to increase. In the process of gradual refinement of the particle size, the particles will reunite under the influence of van der Waals force and electrostatic action of double electric layers. Therefore, it can be considered that after ultrafine particle grinding to a certain extent, accompanied by a series of particles on the physical and chemical properties of the qualitative change, there will be a reversible process of "crushing reunion". When the speed of the positive and negative processes is equal, the dynamic balance in the crushing process is reached, and the particle size reaches the limit value. At this point, further extension of the grinding time is futile. Because the mechanical force at this time is not enough to depolymerize the aggregate so that the particles are further broken, can only be used to maintain the comminution balance, and may cause more small particles to aggregate, so the so-called "reverse grinding", "back coarse" phenomenon will appear. To some extent, the appropriate choice of dispersant is an effective way to solve the phenomenon of "reverse grinding" and "back coarsening". Dispersant can affect the van der Waals force between particles, the electrostatic force of double electric layer, the space repulsion of solvated film and adsorption layer.
Therefore, the selection of dispersant in the ultrafine grinding process is a complex and difficult project, must consider all aspects of the factors, only to ensure that the dispersant has no impact on product performance and system, choose the appropriate dispersant and its dosage, reduce the soft aggregate between the particles in the ultrafine grinding slurry, so that the particles in the system dispersion stability, The grinding fineness of the sand mill can be achieved.
Two, internal reasons
The structure and technical design of the bead mill itself. As a kind of ultra-fine grinding equipment with high efficiency and energy saving, the sand mill has developed rapidly in recent ten years. However, the equipment produced by different manufacturers are different, and the grinding fineness of the equipment produced by the same manufacturer is not the same.
Rucca N series bead mill is a new generation of grinding equipment, using a new design of centrifugal separation device, with large flow, smooth discharge and other advantages. The equipment can use more than 0.1mm grinding medium, and adopts double cooling mode, which effectively reduces the heat generated during grinding and ensures the grinding effect and production efficiency.
Rucca N series bead mill is suitable for grinding all kinds of ceramic materials, as well as other nano-level materials. The equipment adopts advanced grinding technology to ensure that the material after grinding reaches the nanometer level to meet the needs of various applications.
