Frustum diffusion grader

Abstract

The invention discloses a frustum diffusion grader which belongs to the field of grading devices and is mainly applied to such industries as cement, chemical industry and metallurgy. When an existing vibrating sieve grades a material, the material on the sieve surface is dispersed unevenly, local part of the sieve surface is worn seriously, the sieving efficiency is low, the fluid grading energy consumption is high, and the abrasion on components is generated rapidly. The frustum diffusion grader comprises a speed adjusting transmission device, a material scattering disc, a material blocking ring, a frustum diffusion vibrating sieve, an inner pyramid, an outer pyramid and a barrel body. The frustum diffusion grader sieves and grades the materials by mechanical force without depending on wind force, so that energy consumption is low; the material scattering disc is arranged on the upper part of the frustum diffusion grader, so that the material can be uniformly scattered on the sieve surface; the frustum-shaped sieve surface is upright, the sieve surface is small on the upper part and large on the lower part, so that materials can be further graded on the sieve surface, thereby improving the grading efficiency and simultaneously improving the processing capacity in a unit area. Besides, the materials are distributed uniformly on the sieve surface, so that the abrasion on the sieve surface is small, and the service life of the sieve is long.

Description

Technical field: [0001] The invention belongs to the field of classification equipment, and is mainly used in the classification of granular materials larger than 0.5mm in cement, chemical industry, metallurgy and other industries, and can also be used in pre-classification for reducing the load of fluid classification equipment in a powder preparation system. Background technique: [0002] There are mainly two types of coarse powder classification in the current technology. The first one uses a rectangular sieve surface vibrating screen for coarse classification. Because the material to be screened is limited by the process, there is usually only one feeding port, and the width of the upper and lower sides of the screen surface is the same, resulting in material flow. When it is large, it will be unevenly dispersed on the screen surface, the local wear of the screen surface will be serious, the screening efficiency is low, and it is difficult to adapt to large flow screening...

AI Technical Summary

Problems solved by technology

[0002] There are mainly two types of coarse powder classification in the current technology. The first one uses a rectangular sieve surface vibrating screen for coarse classification. Because the material to be screened is limited by the process, there is usually only one feeding port, and the width of the upper and lower sides of the screen surface is the same, resulting in material flow. When it is large, it will be unevenly dispersed on the screen surface, the local wear of the screen surface will be serious, the screening efficiency is low, and it is difficult to adapt to large flow screening; the second type uses fluid for coarse classification, and the V-type classifier and centrifugal fan are connected in series to form a fluid classification equipment. It is more suitable for the classification of fine powder less than 0.1mm. When it is used for classification of coarse powder larger than 0.5mm, it needs to continuously fluidize the coarse particles, so the energy consumption is high and the components wear quickly.

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