High-efficient sticking-blocking resistant wear-resistant round roller screen

Abstract

The invention discloses a high-efficient sticking-blocking resistant wear-resistant round roller screen which mainly comprises a screen frame, a screen plate, elastic brushes, brush plates, and the like. The screen plates are in arc shapes, are casted by wear-resisting steel, and are combined in parallel by a plurality of groups of screen teeth in a shape similar to a V shape, and screen cuts are striped arcs, are axially vertical to the roller screen, are in a shape similar to the V shape, and are gradually enlarged from the inside to the outside in size, therefore, the material is not easy to be blocked. One end of each elastic brush is in a spring shape, and the other end is in a straight line shape; during screening, the straight line ends of the elastic brushes extend into the screen cuts to clean off sticking and blocking material on the roller screen by stabbing, stirring and scraping and the like; the plurality of elastic brushes are regularly fixed on the arc-shaped brush plates through bolts and pressure pads, which ensures that each screen cut basically has a plurality of elastic brushes; and the brush plates can move horizontally, when the elastic brushed are worn seriously, the distance between every two brush plates can be adjusted horizontally to ensure that the elastic brushes are reused. The invention fundamentally solves the problems of material sticking and blocking in the process of material screening can completely overcome the defect that lump ore, coke, and the like stick and block screen pores due to high dust content, humid dust, and the like. The invention realizes the self-cleaning function of materials in the screening process, not only can screen out dust in the materials, but also can completely clear sticky materials away from the surfaces of the materials.

Description

Technical field: [0001] The invention relates to the screening of massive and powdery materials in the metallurgical industry, specifically, a screening device for processing lump ore, pellets, coke, sintered ore, limestone powder, quicklime and other materials. The equipment has the advantages of anti-sticking, high screening efficiency, long life, stable and reliable, low power consumption, low noise and convenient maintenance. Background technique: [0002] Concentrated material is the basis for the stable operation of the blast furnace, and the implementation of the "high, clean, cooked, stable, small and uniform" fine material policy is the basic way for the blast furnace to achieve high production and low consumption. Among them, "net" refers to the powder that is required to be sieved into the furnace charge before entering the furnace. In recent years, with the further development of blast furnace smelting technology, reducing the powder content in the furnace charg...

AI Technical Summary

Problems solved by technology

Among them, the sintered ore is basically screened before being put into the furnace. The screening equipment used is a vibrating screen. It can meet the requirements of ironmaking, but in actual production, the sieve holes of the vibrating screen are often blocked, resulting in low screening efficiency, large dust, and difficulty in removing blockages, which affects the stability of production. Screening under the blast furnace tank in front of the furnace can meet the production requirements, but like sintered ore, it is easy to block the screen hole and affect the screening efficiency; the most difficult thing for blast furnace screening is the screening of lump ore, because the lump ore After the plant, the water content is high and the powder content is high. Using existing screening equipment, it is easy to stick to death and block the screen holes. The screening efficiency is extremely low, causing a large amount of dust to be brought into the blast furnace, which seriously affects the air permeability of the blast furnace material column. The situation is more serious for factories with a large proportion of lump ore in the furnace charge structure. Some factories use water washing method for lump ore when there is no better way. On the one hand, a large amount of water will be brought into the blast furnace to affect the smoothness of production. In addition, it is more difficult to recycle dust; the screening of coke is similar to that of lump ore. Most of the coke produced in China adopts the method of water quenching, and only a few large factories adopt dry quenching. coke method, the moisture of coke is large, coke powder adheres to the coke block, it is not easy to sieve, and the coke powder is easy to block the sieve hole when sieving, and the broken coke in the soft melting zone will affect the air permeability of the "coke window". The cylinder also affects the air permeability and liquid permeability of the dead coke column in the hearth, which makes the initial gas flow distribution disordered; the screening of limestone powder and quicklime also has the problems of clogging the screen holes and low screening efficiency

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