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What are the principles and advantages of high-speed mixers

What are the principles and advantages of high-speed mixers

  • Categories:Industry News
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  • Time of issue:2021-06-23
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(Summary description)The high-speed mixer is the simplest type of dispersion equipment. Its main function is to pre-disperse the pigment, and then cooperate with the sand mill to disperse the pigment.

What are the principles and advantages of high-speed mixers

(Summary description)The high-speed mixer is the simplest type of dispersion equipment. Its main function is to pre-disperse the pigment, and then cooperate with the sand mill to disperse the pigment.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-06-23
  • Views:0
Information

The high-speed mixer is the simplest type of dispersion equipment. Its main function is to pre-disperse the pigment, and then cooperate with the sand mill to disperse the pigment.

The high-speed mixer is a turbulent flow zone formed by the high-speed rotation of a special sawtooth impeller in the material. In this area, the pigment particles are subjected to strong shear and impact, which quickly disperses into the paint slurry. However, no high pressure is generated at this time, and the pigment particles cannot be deaggregated well. Laminar flow is formed outside this area, divided into upper and lower streams, so that the paint paste can be fully circulated and turned and mixed evenly.

The advantages of the high-speed mixer are: simple structure, easy operation, maintenance, and maintenance; flexible use, mixing, dispersing, and reconciling processes can be used; easy cleaning and high production efficiency. High-speed mixer is currently one of the main production equipment used in architectural coating plants.

High-shear mixers are rotor/stator mixers for more challenging solid-liquid dispersions and emulsions, and these high-speed dispersers cannot handle adequately. The typical feature of this type of mixing device is that a four-blade rotor rotates at a high speed in a stationary stator. When the blades rotate, the material is continuously drawn into the mixing head, and the gas is discharged at a high speed through the opening of the stator (Figure 2). The resulting hydraulic shear can promote rapid homogenization, depolymerization and emulsification. The typical rotor tip speed is 3000 to 4000 feet per minute.

When it is necessary to quickly add large quantities of powder to the liquid, or when it takes a long time for the hard-to-disperse solids to be completely added, consider a high-shear mixer with a built-in device that can add the powder below the liquid surface . Although the ejector-based powder injection system can effectively remove floating solids and provide more precise control during the mixing process, it is often affected by clogging and intensive equipment maintenance. In addition, these systems require experienced operators to handle frequently encountered difficult tasks, namely the performance balance of three independent devices in series: ejector, pump, and agitator. The high-shear mixer with powder injection integral structure is more reliable and easier to operate.

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