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Joint refractory material for heat exchange of converter bottom and construction method

A refractory material and converter bottom technology, which is applied in the field of steelmaking, can solve the problems of low packing life, insufficient fluidity, and inability to ensure packing compactness, etc. Effect

Active Publication Date: 2018-08-24
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of quickly replacing the bottom of the converter, the main difficulty lies in the compactness of the filler in the gap between the magnesia-carbon refractories built on the steel shell of the furnace bottom and the magnesia-carbon refractories built on the steel shell of the furnace body However, in the existing technology, the gaps are basically compacted by the self-flow of the filler. Due to insufficient fluidity, the compactness of the filler cannot be ensured, resulting in a low life of the filler, or even only More than a dozen furnaces, so there is a need for a seam refractory material for converter bottom heat replacement that can be pumped mechanically and has a long service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A joint refractory material for heat replacement of the converter bottom according to Embodiment 1 of the present invention is composed of a first component and a second component, wherein the first component is: fused magnesia 82wt% , ultra-high temperature asphalt balls 3wt%, graphite 4wt%, metal aluminum powder 9wt%, metal silicon powder 2wt%; the second component includes thermosetting phenolic resin, ethylene glycol and hexamethylenetetramine, and thermosetting phenolic resin accounts for the first 9 wt% of the components, ethylene glycol accounts for 12 wt% of the first component, and curing agent accounts for 0.5 wt% of the first component.

[0041] Further, in Example 1 of the present invention, the maximum particle size of magnesia is 8mm, and the content of MgO in the magnesia particles is 98wt%.

[0042] Put the magnesia, asphalt, graphite, metal powder and curing agent in the above weight ratio into the mixer for 3 minutes, then add the pre-mixed resin and a...

Embodiment 2

[0048]A joint refractory material for heat replacement of the converter bottom according to Embodiment 2 of the present invention is composed of a first component and a second component, wherein the first component is: 75wt% of sintered magnesia, Ultra-high temperature asphalt ball 7wt%, graphite 4wt%, graphite 6wt%, metal aluminum powder 9wt%, metal silicon powder 3wt%; the second component includes epoxy resin, ethylene glycol and hexamethylenetetramine, epoxy resin Accounting for 10 wt% of the weight of the first component, ethylene glycol accounting for 12 wt% of the first component, and curing agent accounting for 1 wt% of the first component.

[0049] Further, the maximum particle size of the magnesia in Example 2 of the present invention is 5mm, and the MgO content in the magnesia particles is 96wt%.

[0050] Put the magnesia, asphalt, graphite, metal powder and curing agent in the above weight ratio into the mixer for 6 minutes, then add the pre-mixed resin and alcohol...

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Abstract

The invention discloses a joint refractory material for heat exchange of the converter bottom and a preparation method and a construction method of the joint refractory material. The joint refractorymaterial is prepared from a first constituent part and a second constituent part, wherein the first constituent part comprises following components in percentage by weight: 63wt%-85wt% of magnesia, 0-10wt% of asphalt, 0-10wt% of graphite and 2wt%-17wt% of metal powder; the second constituent part is prepared from resin accounting for 5wt%-15wt% of weight of the first constituent part, alcohol substances accounting for 5wt%-15wt% of weight of the first constituent part and a curing agent accounting for 0.5wt%-1.5wt% of weight of the first constituent part. The joint refractory material can meetthe requirement of 1000-2000 furnaces of service life when the converter bottom is replaced in new furnace campaign and medium term of furnace campaign and guarantees normal and safe production of aconverter.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a seam refractory material for heat replacement of a converter bottom and a construction method. Background technique [0002] The converter is mainly used to produce carbon steel, alloy steel and smelt copper and nickel, and is currently the most commonly used steelmaking equipment. The life of the converter lining is an important factor affecting the continuity of the steelmaking process. [0003] In order to obtain greater output, the converter has been pursuing a longer furnace life for a long time, and the furnace life can even reach more than 10,000 furnace times. However, in the current steelmaking process, the life of the furnace lining at the bottom of the converter is difficult to synchronize with the life of the furnace lining. According to statistics, when the furnace age of most converters reaches 2,000 furnace times, it is difficult to ensure that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/402C04B2235/425C04B2235/428C04B2235/96
Inventor 崔园园钟凯尹娜高攀曹勇李海波王新华朱国森田志红崔阳彭开玉刘风刚贾祥超邵俊宁
Owner SHOUGANG CORPORATION
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