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Rod type screen bottom of pulverized coal vibrating screen

A rod-type, sieve-bottom technology, which is applied in the direction of filter screen, solid separation, grid, etc., can solve the problems of rod fatigue fracture, blast furnace spray gun blockage, and influence on the quality of coal powder, so that it is not easy to vibrate and crack, and the quality is ensured , Easy to clean the bottom of the screen

Active Publication Date: 2016-04-13
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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  • Rod type screen bottom of pulverized coal vibrating screen
  • Rod type screen bottom of pulverized coal vibrating screen
  • Rod type screen bottom of pulverized coal vibrating screen

Examples

Experimental program
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Embodiment 1

[0024] Such as Figure 4 with Figure 5 As shown, a sieve bottom of a rod-type pulverized coal vibrating screen includes a three-layer screen group, and any one of the three-layer screen groups includes a rod-type screen 17 and The U-shaped square-hole screen 18 is provided with a sealing strip 19 between the rod-shaped screen 17 and the U-shaped square-hole screen 18 and fixed together by a fixing member 20.

[0025] The screen groups shown are the upper, middle, and lower layers.

[0026] According to the installation size of the bar screen, three square-hole screens with a U-shaped structure are produced. A sealing strip is added between the two layers of screens, and flange bolts are used to connect and install the upper and lower sieve bodies in the pulverized coal vibrating screen. After the installation of the sieve bottom is completed, the production test of granular coal pulverization can be started. During this period, attention should be paid to parameters such as pulv...

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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 present invention belongs to the technical field of granular coal injection. Specifically, the present invention relates to a bar type coal vibrating screen bottom. Background technique [0002] Pulverized coal for blast furnace injection is to directly inject ground anthracite or bituminous coal or a mixture of the two from the blast furnace tuyere 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 coal, there are two types of technology: pulverized coal injection and granular coal injection. Pulverized coal injection technology developed earlier and is relatively mature; granular coal injection technology has only been rapidly ...

Claims

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Application Information

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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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