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

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 ...

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

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