Partitioned multi-stage screening analysis and effect evaluation method

Abstract

The invention discloses a partitioned multi-stage screening analysis and effect evaluation method which comprises the following steps: uniformly dividing an undersize product into c-1 regions according to the screen length in the material flow migration direction, and taking an oversize product as a cth region; screening the materials in each area for 1-1 time, dividing the materials into 1 size fractions which are sequentially 1, 2, 3... 1 from small to large, and respectively weighing the materials with different size fractions in each area to obtain the mass of the materials; and further obtaining the sieve penetration distribution rule of the materials of each size fraction in different areas, and obtaining the sieve surface of each area, the lengths of different sieve surfaces, the overall sieving efficiency and the total mismatch content. The method can accurately, conveniently and reliably determine the screening distribution rule of the materials of each size fraction in the screening process, evaluate the screening effect of the screen surfaces in different areas, and provide reference for optimization of key process parameters in the screening process and structural design of the high-performance vibrating screen.

Description

technical field [0001] The invention relates to the technical field of material screening, in particular to a partitioned multi-stage screening analysis and effect evaluation method. Background technique [0002] Screening technology is a classification process in which broken materials pass through the sieve holes of the sieve surface and are divided into various products with different particle sizes according to their particle size. It is widely used in coal, metallurgy, chemical industry, building materials and other fields. key link. Efficient screening of coal and minerals is of great significance for simplifying the processing system, reducing production costs, improving economic benefits and protecting the environment. [0003] In the actual sieving process, not all particles smaller than the sieve size can pass through the sieve hole to become the under-sieve product, and there are some fine-grained materials smaller than the sieve size that fail to pass through th...

AI Technical Summary

Problems solved by technology

Using the above method, it is impossible to accurately, conveniently and reliably obtain the sieve distribution of materials of various sizes in different regions, and it is difficult to establish the expressions of the sieve surface in each region, the sieving efficiency of different sieve surface lengths and the total mismatch content. It is impossible to accurately evaluate the screening effect of different screen surfaces and different screen surface lengths along the material flow direction

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