Potential energy pulp supply feeding-screening method

Abstract

The invention provides a potential energy pulp supply feeding-screening method. Firstly, pulp is divided into multiple strands; each strand of feed ore is fed and extends to the screening face of screening equipment to the position not larger than the length of the screening face by 1 / 2; and each strand of feed ore is screened through step type buffering with the inclination angle reduced. By the adoption of the technical scheme of the potential energy pulp supply feeding-screening method, the screen with is effectively utilized, the utilization rate of the screening face is increased, particles, passing through a screen, in the pulp can be screened out in time, ore particles reserved on the screening face are greatly reduced, in addition, light and thin ore particles are firstly screened, the screening efficiency is improved, the one-time screening rate is 90% or above, and the yield in unit time is increased by 50% to 300 %; in addition, the service life of the screen is prolonged by 30% to 200%; and in addition, the particle size range suitable for screening is large, and the minimum screening particle size can reach 600 meshes to 800 meshes.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a potential energy slurry feeding-screening method. Background technique [0002] Classification technology is the content of classification technology in the mineral processing process such as crushing, grinding, classification, and selection. Classification technology is further divided into spiral classifier classification, cyclone classification, screening classification, etc. The main purpose of classification in the beneficiation process is to make the mineral particles that have met the requirements of beneficiation, such as flotation, gravity separation, magnetic separation, and electric separation, enter the beneficiation process immediately, and carry out mineral processing due to the coexistence of too fine or too coarse mineral particles. It is difficult for the process to carry out effective selection and re-selection preprocessing. Sieving is...

AI Technical Summary

Problems solved by technology

[0003] 1. The orderly rule of "coarse grains on the bottom and fine grains on top" established by the flow of materials during the feeding process, thus forming coarse grains to contact the sieve surface and sieve holes first, coarse grains hinder the screening of medium grains, and medium grains hinder the fine grains Particles are sieved out, and fine particles hinder the situation that fine particles are sieved out, causing screening effect and low efficiency

[0004] 2. The corresponding ore supply volume within the unit screen width is too large, the slurry flow film is too thick, the positive pressure and momentum will cause great wear and damage to the screen, and the probability of sieved particles contacting the screen hole is low

[0005] In the screening of the prior art, due to the differences in the natural particle size and specific gravity of the materials during the feeding process, the materials form an orderly law during the feeding flow process-the coarse and heavy particles are in the lower layer, and the light and fine particles are in the upper layer. As a result, coarse grains and heavy grains contact the sieve surface first, coarse grains and heavy grains block the medium grains from contacting the screen surface mesh, and medium grains block light grains and fine grains from contacting the screen surface mesh. The fine grains must be vibrated, sprayed Or the problem that there is a chance to reach the unblocked screen mesh during the flow process before being screened out; at the same time, because the slurry flow film at the feeding end is too thick and the positive pressure scour force is large, the screen mesh at the feeding end will also wear quickly In addition, the unreasonable supply of materials also leads to the problem of low utilization rate of the screen surface, these problems or defects increase the difficulty of production and application

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