Method for differentially treating blast furnace hearth structure

A blast furnace technology with structural differences, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as erosion, and achieve the effect of improving furnace service life

Inactive Publication Date: 2020-06-30
LIUZHOU IRON & STEEL CO LTD +1
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  • Abstract
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Problems solved by technology

[0004] The present invention provides a method for differential treatment of blast furnace hearth structure, which can solve the above-mentioned problem of "elephant foot" eros

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  • Method for differentially treating blast furnace hearth structure
  • Method for differentially treating blast furnace hearth structure
  • Method for differentially treating blast furnace hearth structure

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specific Embodiment approach

[0018] Such as figure 1 As shown, the first layer 1 of the furnace bottom is covered with imported high-conductivity graphite bricks COBEX GmbH RN; the second layer 2 and the third layer 3 of the furnace bottom are covered with imported microporous carbon bricks COBEX GmbH 3RDN; the fourth layer 4 of the furnace bottom is covered with imported Ultra-microporous carbon bricks COBEX GmbH9RDN; the fifth layer of the furnace bottom is built with ultra-microporous carbon bricks COBEX GmbH9RDN on the outside, and the inside is built with imported microporous carbon bricks COBEX GmbH3RDN; Porous carbon brick COBEX GmbH9RDN, using microporous corundum ceramic cup, the first corundum mullite ceramic pad, the first corundum mullite ceramic pad, and the ring joint 19 between the ceramic pad and the carbon brick is filled with imported ramming material COBEXGmbHRST 18 ECO PLUS; the height of the entire furnace bottom masonry is 3200mm. From the bottom of the 4th layer of the furnace bott...

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Abstract

The invention discloses a method for differentially treating a blast furnace hearth structure. The method comprises the following steps of: arranging two differential treatment layers which are distributed up and down at the bottom of a blast furnace hearth contacted with molten iron in the early stage of furnace service in blast furnace production and smelting, wherein the upper differential treatment layer is close to the molten iron, and the other layer is the lower differential treatment layer; the upper differential treatment layer is provided with a first ultra-microporous carbon brick layer, a microporous corundum ceramic cup layer, a first corundum mullite ceramic cushion layer, and a second corundum mullite ceramic cushion layer in turn from outside to inside; and the lower differential treatment layer is provided with a second ultra-microporous carbon brick layer and a microporous carbon brick layer in turn from outside to inside. In the method, conventional 'elephant foot' erosion is changed into 'pan bottom' erosion in the erosion process of the bottom of the blast furnace hearth by mainly utilizing the difference between the physical and chemical properties of ultra-microporous carbon bricks, microporous carbon bricks and other materials, so that the problem of 'elephant foot' erosion occurring at an iron notch of the hearth and in the area around the iron notch during the conventional blast furnace production is solved, and the service life of the furnace is prolonged.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a method for differentiated treatment of a blast furnace hearth structure. Background technique [0002] The blast furnace taphole and the area around the taphole are the most active and harshest working environment areas in the entire hearth. The refractory carbon bricks of the hearth are eroded more seriously, most of which are "elephant foot" erosion, and the life of the hearth is mostly determined by the "elephant foot". foot” erosion condition. Under the conditions of blast furnace production, the factors affecting the differential treatment of the blast furnace hearth structure are the hearth design, refractory material performance, and refractory quality in the construction process. The molten iron circulation, molten iron corrosion, and harmful elements in the normal production process Erosion, thermal stress and structural stress, cooling strength, inf...

Claims

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Application Information

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IPC IPC(8): C21B7/06C21B5/00
CPCC21B7/06C21B5/00
Inventor 陈汝刚莫朝兴黄良鹏阎峰梁东靳高峰关江峰刘轩何利李玄烨刘智曹俊洪
Owner LIUZHOU IRON & STEEL CO LTD
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