A kind of wet method continuous grading equipment and grading method for flaky particles

A flaky particle, wet process technology, applied in the field of solid particle wet classification equipment, can solve the problems of slow sedimentation speed of classified particles, large area of ​​sedimentation equipment, and large amount of product fine powder entrainment, so as to reduce the amount of entrainment, The effect of shortening the settlement distance and improving the quality

Active Publication Date: 2018-07-06
广东三宝新材料科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages are obvious: the settling equipment occupies a large area, intermittent production, low degree of automation, large amount of product fine powder entrainment, repeated classification to obtain products with narrow particle size distribution, high production cost, and when the particle size is in the micron level, the classified particles settle. slow and inefficient

Method used

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  • A kind of wet method continuous grading equipment and grading method for flaky particles
  • A kind of wet method continuous grading equipment and grading method for flaky particles
  • A kind of wet method continuous grading equipment and grading method for flaky particles

Examples

Experimental program
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Effect test

Embodiment 1

[0058] The raw material is artificially synthesized fluorphlogopite mica powder after grinding, with a density of 2.88g / cm 3 , Raw material particle size distribution: D 90 = 251.724 μm, D 50 = 77.11 μm, D 10 =23.314μm; the solid content of the prepared suspension is 12.70%; the main dimensions of the equipment are as follows figure 1 , 2 , 3, and 4: the space between the upper inclined plate 1‐1 and the lower inclined plate 1‐2 is d=7mm, the length L of the upper inclined plate 1‐1 or the lower inclined plate 1‐2 is 2000mm, and the upper The inclination angle α of the inclined plate 1-1 or the lower inclined plate 1-2 is 45°, the width w of the upper inclined plate 1-1 or the lower inclined plate 1-2 is 500mm, and the diameter of the circular hole 6-5 on the distribution plate is 4mm.

[0059]Classification process: prepare artificially synthesized fluorphlogopite powder suspension with a solid content of 12.70%, add sodium pyrophosphate dispersant, the content of sodium...

Embodiment 2

[0065] The raw material is ground natural mica powder with a density of 3.00g / cm 3 , Raw material particle size distribution: D 90 = 240.793 μm, D 50 =80.578μm, D 10 =23.743μm; the solid content of the prepared suspension is 7.77%; the main dimensions of the equipment are as follows figure 1 , 2 , 3, and 4: the partition spacing between the upper inclined plate 1-1 and the lower inclined plate 1-2 = 35mm, the length L of the upper inclined plate 1-1 or the lower inclined plate 1-2 = 1500mm, the upper The inclination angle α of the inclined plate 1-1 or the lower inclined plate 1-2 is 55°, the width w of the upper inclined plate 1-1 or the lower inclined plate 1-2 is 500mm, and the diameter of the circular hole 6-5 on the distribution plate is 4mm. The classification process is the same as in Example 1, and the raw material is classified into six sections five times. The particle size distribution of each section after the raw material and classification is as shown in Tab...

Embodiment 3

[0070] The raw material is flake aluminum powder obtained after grinding, with a density of 2.70g / cm 3 , Raw material particle size distribution: D 90 = 318.447 μm, D 50 = 92.971 μm, D 10 =26.495μm; the solid content of the prepared suspension is 4.44%; the main dimensions of the equipment are as follows figure 1 , 2 , 3, and 4: the partition spacing between the upper inclined plate 1-1 and the lower inclined plate 1-2 = 35mm, the length L of the upper inclined plate 1-1 or the lower inclined plate 1-2 = 1500mm, the upper The inclination angle α of the inclined plate 1-1 or the lower inclined plate 1-2 is 55°, the width w of the upper inclined plate 1-1 or the lower inclined plate 1-2 is 500mm, and the diameter of the circular hole 6-5 on the distribution plate is 4mm. The classification process is the same as in Example 1, and the raw material is classified into five sections four times. The raw material and the particle size distribution of each section after classifica...

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Abstract

The invention discloses a wet process continuous classifying device and method for flaky grains. The wet process continuous classifying device comprises a bottom end material accumulating section, a fluidization section, an inclined ascending flow section, a reducing ascending flow section and a closed-loop flow constant value feedback control system. A liquid-solid fluidized bed of the fluidization section is a sealed cavity, and a fluid distributor is arranged at the bottom in the cavity. The bottom of the fluid distributor is connected with a feeding pipe. The fluid distributor is composed of a distribution plate and a conical cavity. A gap of 10-100 mm exists between the distribution plate and the inner surface of a box of the fluidization section. During classifying, prepared suspension liquid is conveyed through a centrifugal pump to flow through the fluid distributor to enter the fluidization section, the grains are sequentially classified through the fluidization section, the inclined ascending flow section and the reducing ascending flow section, small grain suspension fluid overflows from a top end overflow pipe, and after a material seal is formed by large grains on the equipment material accumulating section, the large grains are output from a screw discharger. The wet process continuous classifying device and method have the beneficial effects that operation is stable, continuous production is achieved, the automation degree is high, the processing amount is large per unit occupied area, the product grain fineness distribution is narrow, and the production cost is low.

Description

technical field [0001] The invention relates to a solid particle wet grading device and method, in particular to a continuous wet grading device and method for flaky fine particles with the same density. Background technique [0002] Classification is the process of dividing the particle group into two or more particle size levels by using the different characteristics of particle size, density, shape, and radioactivity. According to the different fluid media where the particles are located, there are two methods of particle classification, dry method and wet method. The wet method is due to the dispersion of liquid (usually water), and a dispersant can be added to make the particle dispersion more uniform. In addition, due to The limitations of particle properties and production processes such as wet grinding force the application of wet classification. Wet classifiers have been developed and researched for many years, and there are mainly two types of wet classifiers for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B5/36
CPCB03B5/36
Inventor 李祈霖王硕江燕斌黄腾
Owner 广东三宝新材料科技股份有限公司
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