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A sieve bottom of a rod-type pulverized coal vibrating sieve

A rod-type, sieve-bottom technology, which is used in sieves, solid separation, chemical instruments and methods, etc., can solve problems such as rod fatigue fracture, blast furnace lance blockage, and influence on the quality of pulverized coal. Ensure quality and facilitate cleaning of the bottom of the screen

Active Publication Date: 2019-01-08
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problems often exist during use: sundries or large particles are squeezed between the rods, or the rods are warped and deflected under the action of vibration and pulverized coal impact, or the rods are fatigued and broken These will enlarge the gap between adjacent rods on the bottom of the screen several times, resulting in debris, large particles and other over-sieves entering the bottom of the screen. , thus seriously affecting the quality of pulverized coal, resulting in a production accident of large-area spray gun blockage in the blast furnace

Method used

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  • A sieve bottom of a rod-type pulverized coal vibrating sieve
  • A sieve bottom of a rod-type pulverized coal vibrating sieve
  • A sieve bottom of a rod-type pulverized coal vibrating sieve

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Embodiment 1

[0024] like Figure 4 and Figure 5 Shown, the screen bottom of a kind of rod-type pulverized coal vibrating screen, described screen bottom comprises three layers of screen mesh groups, any layer of screen mesh groups in described three layers of screen mesh groups comprises rod type screen cloth 17 and The U-shaped square-hole screen 18 , the bar-type screen 17 and the U-shaped square-hole screen 18 are provided with a sealing strip 19 and fixed together by a fixing piece 20 .

[0025] The screen groups shown are upper layer, middle layer and lower layer respectively.

[0026] According to the installation size of the rod screen, three pieces of square hole screen with U-shaped structure are made. A sealing strip is added between the two layers of screens, and flange bolts are used to connect and install the upper and lower screen bodies in the pulverized coal vibrating screen. After the installation of the sieve bottom is completed, the production test of granular coal p...

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Abstract

The invention discloses a rod type screen bottom of a pulverized coal vibrating screen. The screen bottom comprises multiple layers of screen groups, wherein the screen group on each layer comprises a rod type screen (17) and a U-shaped square hole type screen (18), and seal strips (19) are arranged between the rod type screen (17) and the U-shaped square hole type screen (18), and the rod type screen (17) and the U-shaped square hole type screen (18) are fixed together through fixing elements (20). The screen bottom can intercept various impurities effectively, the probability of vibrating breakage is low, and the quality of pulverized coal is improved.

Description

technical field [0001] The invention belongs to the technical field of granular coal injection, in particular, the invention relates to a sieve bottom of a bar type coal powder vibrating sieve. Background technique [0002] Blast furnace pulverized coal injection is the direct injection of pulverized anthracite or bituminous coal or a mixture of the two from the blast furnace tuyeres into the furnace. In the blast furnace smelting process, pulverized coal is injected into the blast furnace to replace coke to provide heat and reducing agent, thereby reducing the coke ratio and reducing the cost of pig iron. It can be said that blast furnace coal injection is a major technological revolution in modern blast furnace smelting. According to the particle size of pulverized coal, there are two types of process technologies: pulverized coal injection and granular coal injection. Pulverized coal injection technology developed earlier and is relatively mature; granular coal injection...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07B1/46B07B1/28
CPCB07B1/28B07B1/4609B07B2201/04
Inventor 陈江涛孙树峰张超杨永秀李丽
Owner SHANDONG IRON & STEEL CO LTD
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