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Shaft furnace cloth chute and manufacture method thereof

A technology of distributing chutes and blast furnaces, applied in the direction of arrangement of bells and funnels, etc., which can solve the problems of large differences in the properties of inner and outer layers of materials, and achieve the effects of small high-temperature deformation, consistent wear resistance, and reduced weight

Inactive Publication Date: 2014-04-16
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 1. The material distribution chute is composed of an outer shell and an inner lining layer. The properties of the inner and outer layers are quite different. How to realize the high-strength composite of the inner and outer layers is the key point;

Method used

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  • Shaft furnace cloth chute and manufacture method thereof
  • Shaft furnace cloth chute and manufacture method thereof
  • Shaft furnace cloth chute and manufacture method thereof

Examples

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Effect test

Embodiment 1

[0036] In this example, the material of the lining layer is quenched and tempered wear-resistant steel NM360, the size is 20mm×2000mm×2200mm, and the quantity is 2 pieces; the material of the outer shell is low alloy structural steel Q345, the size is 30mm×2000mm×2200mm, the quantity is 2 pieces pieces.

[0037] The preparation method of blast furnace distribution chute comprises the steps:

[0038] 1) Surface cleaning: select two slabs of the outer shell layer and the inner lining layer of the blast furnace distribution chute with the same length and width, and clean any surface of the inner lining layer slab and the two surfaces of the outer shell layer slab to remove Surface oil, rust and oxide layer, and dry, the cleaned surface is clean and visible metallic luster;

[0039]2) Blank assembly: stack the four slabs cleaned in step 1) together in the order of inner lining layer, outer shell layer, outer shell layer and inner lining layer, and align all around; Spray or coat...

Embodiment 2

[0047] The material of the lining layer in this embodiment is quenched and tempered wear-resistant steel NM400, the size is 20mm×2000mm×2200mm, and the quantity is 2 pieces; the material of the outer shell is austenitic heat-resistant steel plate 0Cr18Ni9Ti, the size is 30mm×2000mm×2200mm, Quantity 2 pieces.

[0048] The preparation method of blast furnace distribution chute comprises the steps:

[0049] 1) Surface cleaning: select two slabs of the outer shell layer and the inner lining layer of the blast furnace distribution chute with the same length and width, and clean any one surface of the inner lining layer slab and the two surfaces of the outer shell layer slab to remove Surface oil, rust and oxide layer, and dry, the cleaned surface is clean and visible metallic luster;

[0050] 2) Blank assembly: stack the four slabs cleaned in step 1) together in the order of inner lining layer, outer shell layer, outer shell layer and inner lining layer, and align all around; Spr...

Embodiment 3

[0058] In this embodiment, the material of the lining layer is quenched and tempered wear-resistant steel NM360, the size is 20mm×2000mm×2200mm, and the quantity is 2 pieces; the material of the outer shell is 1Cr18Ni9Ti, the size is 30mm×2000mm×2200mm, and the quantity is 2 pieces.

[0059] The preparation method of blast furnace distribution chute comprises the steps:

[0060] 1) Surface cleaning: select two slabs of the outer shell layer and the inner lining layer of the blast furnace distribution chute with the same length and width, and clean any one surface of the inner lining layer slab and the two surfaces of the outer shell layer slab to remove Surface oil, rust and oxide layer, and dry, the cleaned surface is clean and visible metallic luster;

[0061] 2) Blank assembly: stack the four slabs cleaned in step 1) together in the order of inner lining layer, outer shell layer, outer shell layer and inner lining layer, and align all around; Spray or coat a layer of high-...

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Abstract

The invention discloses a shaft furnace cloth chute and a manufacture method thereof. The shaft furnace cloth chute consists of a casing and a lining layer, wherein the lining layer is made of tempering abrasion-resistant steel, and the casing is made of structural low-alloy steel or an austenite heat-resisting steel plate. The manufacture method of the shaft furnace cloth chute sequentially comprises the steps of surface washing, blank assembly, welding, heating, rolling, temperature control, thermal treatment, processing and forming and the like. The shaft furnace cloth chute can achieve compounding of the casing of the cloth chute and an internal abrasion-resistant layer in a rolling-combined mode and is large in connecting and contacting face and tight in combination.

Description

technical field [0001] The invention relates to a blast furnace distribution chute and a preparation method thereof, in particular to a blast furnace distribution chute made of wear-resistant steel composite plates and a preparation method thereof. Background technique [0002] The distribution chute is a key component of the ironmaking blast furnace, and its main function is to distribute the charge to various positions of the furnace throat. The working position of the distributing chute is located at the top of the blast furnace cavity. Under normal conditions, the pressure is 0.25MPa, and the working temperature is between 100 and 200°C. When the furnace is abnormal, the temperature is between 200 and 320°C. In extreme cases, the temperature of the top of the furnace will be instantaneous. over 800°C. The batches of blast furnace charges are continuously rushed from the material flow control valve to the distribution chute through a drop of about 8m according to the cor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/20
Inventor 汪荣杨奕蒋扬虎韩斌魏兵钟毅
Owner 武钢集团有限公司
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