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Medium mixing up of wet-type dispersion machine

A stirring and dispersing machine technology, which is applied in separation methods, grain processing, chemical instruments and methods, etc., can solve the problems that it is difficult to balance the crushing function and grading function, and the functions of both cannot be fully utilized.

Active Publication Date: 2006-09-13
NIPPON COKE & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to balance the crushing function and the grading function, and it is impossible to fully exert the functions of both

Method used

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  • Medium mixing up of wet-type dispersion machine
  • Medium mixing up of wet-type dispersion machine
  • Medium mixing up of wet-type dispersion machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Using the medium agitation type wet disperser of the present invention described in the first embodiment, a test for dispersing secondary agglomerated titanium oxide was performed under the conditions shown below to confirm its performance.

[0089] Put the prepared slurry into the holding tank, and introduce it to the supply port of the disperser with a quantitative pump, return the slurry discharged from the discharge port of the disperser to the holding tank again to form a circulation system, and start in this state The disperser was tested.

[0090] After the disperser is started, samples are taken from the outlet of the disperser at regular intervals. In the measurement of the particle size, a particle size analyzer (MICROTRAC®) MKIIDRA of Nikkiso Co., Ltd. was used to measure by laser diffraction and light scattering method.

[0091] processing conditions

[0092] Dispersing machine: such as figure 1 and 2 For the disperser shown, the outer diameter of the ou...

Embodiment 2

[0103] The rotational speeds of the two rotors were changed to 1600 rpm, and other conditions were the same as in Example 1. 90 minutes after the operation was started, a dispersion liquid having an average particle diameter of 24.1 nm was obtained. In the dispersion liquid, no medium was mixed.

[0104] Next, a test for dispersing the titanium oxide (average particle diameter: 2.4 μm) was performed under the conditions shown in Table 1 using the medium agitation type wet disperser of the present invention shown in the second embodiment to confirm its performance.

[0105] Put the prepared slurry into the holding tank, introduce it to the supply port of the disperser with a quantitative pump, return the slurry discharged from the discharge port of the disperser to the holding tank again, form a circulation system, and start in this state The disperser was tested.

[0106] Example 3

Embodiment 3

[0108] After the disperser is started, samples are taken from the discharge port of the disperser at predetermined intervals. In the measurement of the particle size, a particle size analyzer (MICROTRAC®) MKIIDRA of Nikkiso Co., Ltd. was used to measure by laser diffraction and light scattering method.

[0109] Zirconia beads with a particle diameter of 0.03 mm were used as a medium, and the dispersion test was performed by filling 53.7% of the volume of the dispersion tank with the rotational speed of the rotor at 1600 rpm. As a result, 90 minutes after the start of the operation, the average particle size of the processed product was 24.1 nm, and no medium was mixed.

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Abstract

The medium stirring wet dispersing machine has a cylindrical dispersing tank, a tubular rotation shaft, an outer rotor with blades arranged to form one cylinder for generating centrifugal force, and an inner rotor inside the outer rotor and with also blades arranged to form one cylinder for generating centrifugal force. The outer rotor possesses functions of crushing and dispersing particles, whereas the inner rotor possesses functions of separating and grading medium. Therefore, the present invention can disperse medium in nanometer level and has great capacity and excellent grading performance.

Description

technical field [0001] The present invention relates to a medium agitation type wet disperser for continuous dispersion treatment, in particular to a medium agitation type wet disperser capable of pulverizing solid particles contained in a treatment liquid into nano-sized particles. Background technique [0002] The so-called wet dispersion treatment refers to the treatment of pulverizing the particles contained in the liquid to make finer particles. It is often used in a wide range of fields such as inks, paints, ceramic particles, metals, inorganic substances, and pharmaceuticals. [0003] As one of the dispersers used in these treatments, there is a medium stirring type disperser. This disperser stirs the treatment liquid and the medium together in the container, and uses the shear force of the medium to pulverize and disperse the particles. [0004] The treated dispersion liquid is separated from the medium by a separator installed in the container, and then discharged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/16B02C17/18B01D7/00
Inventor 郡司进石川修
Owner NIPPON COKE & ENG
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