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Adhesive for bottom-sprayed powder air supply element, preparation method and bonding method thereof

A gas supply element and adhesive technology, which is applied in the field of refractory materials, can solve the problems of short service life of the bottom dusting gas supply element, easy loosening of the inner lining pipe and outer casing, and weak bonding of the adhesive. Excellent bonding performance, tight and firm bonding, and the effect of improving the bonding effect

Active Publication Date: 2021-09-28
北京钢研新冶工程技术中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a kind of adhesive for bottom-sprayed powder air supply components and its preparation method and bonding method, in order to solve the problem that the existing adhesive is not firmly bonded, especially when used at high temperature. When it is used, the bonding strength is poor, the inner liner and the outer sleeve are easy to loose, the service life of the bottom powder spraying air supply element is short, and it needs to be replaced frequently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043](1) Take by weighing 50 parts of alumina powder with a particle size of 160 objects and 50 parts of aluminum dihydrogen phosphate liquid respectively;

[0044] (2) Add 26 parts of alumina powder into the liquid phosphate and stir for 3 minutes to obtain the first viscous solution;

[0045] (3) Add 12 parts of alumina powder into the first viscous solution and stir for 5 minutes to obtain the second viscous solution;

[0046] (4) Add 12 parts of alumina powder into the second viscous solution and stir for 20 minutes to obtain a homogeneous solution;

[0047] (5) Apply the homogeneous solution on the outer wall of the inner lining tube and the inner wall of the outer casing of the bottom spraying powder air supply element, slowly insert the inner lining tube into the outer casing and continue to apply the adhesive to ensure full filling, at 2°C / min Raise the temperature to 140°C and keep it warm for 2 hours; at a heating rate of 5°C / min, raise the temperature to 180°C, ke...

Embodiment 2

[0049] (1) Take by weighing 80 parts of alumina powders with a particle size of 350 objects and 20 parts of aluminum dihydrogen phosphate liquid respectively;

[0050] (2) Add 40 parts of alumina powder into liquid phosphate, stir for 5 minutes to obtain the first viscous solution;

[0051] (3) Add 20 parts of alumina powder into the first viscous solution and stir for 10 minutes to obtain the second viscous solution;

[0052] (4) Add 20 parts of alumina powder into the second viscous solution and stir for 40 minutes to obtain a homogeneous solution;

[0053] (5) Apply the homogeneous solution to the outer wall of the inner lining tube and the inner wall of the outer casing of the bottom powder spraying air supply element, slowly insert the inner lining tube into the outer casing and continue to apply the adhesive to ensure full filling, at 5°C / min Raise the temperature to 80°C and keep it warm for 4 hours; at a heating rate of 10°C / min, raise the temperature to 260°C, keep i...

Embodiment 3

[0055] (1) Take by weighing 60 parts of alumina powder with a particle size of 180 objects and 40 parts of aluminum dihydrogen phosphate liquid respectively;

[0056] (2) Add 30 parts of alumina powder into the liquid phosphate, and stir for 3 minutes to obtain the first viscous solution;

[0057] (3) Add 15 parts of alumina powder into the first viscous solution and stir for 5 minutes to obtain the second viscous solution;

[0058] (4) Add 15 parts of alumina powder into the second viscous solution and stir for 20 minutes to obtain a homogeneous solution;

[0059] (5) Apply the homogeneous solution on the outer wall of the inner lining tube and the inner wall of the outer casing of the bottom spraying powder air supply element, slowly insert the inner lining tube into the outer casing and continue to apply the adhesive to ensure full filling, at 2°C / min Raise the temperature to 120°C and keep it warm for 2 hours; at a heating rate of 5°C / min, raise the temperature to 200°C, ...

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Abstract

The invention relates to a binder for a bottom-sprayed powder air supply element and a preparation method and a bonding method thereof, which belong to the technical field of refractory materials and solve the problem of weak bonding of existing binders, especially when used at high temperatures. Poor bonding strength, easy loosening between the inner lining pipe and the outer casing, short service life of the bottom powder spraying air supply element, and frequent replacement. The binder used for the bottom spraying powder air supply element includes 50-80 parts of powder and 20-50 parts of liquid phosphate. The preparation method of the binder for the air supply element of the bottom spray powder: add the powder into the liquid phosphate in batches, and stir to obtain it. Apply the adhesive to the outer wall of the inner liner tube of the bottom powder spraying air supply element and the inner wall of the outer sleeve, insert the inner liner tube into the outer sleeve, heat up and solidify, and complete the bonding of the inner liner tube and the outer sleeve of the bottom powder spraying air supply element. The invention realizes the wide application of the binder in the technical field of refractory materials.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a binder for bottom-sprayed powder-sprayed air supply components, a preparation method and a bonding method thereof. Background technique [0002] High productivity, high production pace, high utilization factor, low consumption, and low cost have increasingly become important directions for the development of electric furnace and converter steelmaking technology. [0003] Bottom spray powder gas supply components are the key components of converter and electric furnace bottom oxygen supply powder spray process. The bottom powder spraying air supply element is composed of an inner lining pipe and an outer casing, and the bonding effect between the two is the key to its quality. [0004] Apply the existing adhesive between the inner liner and the outer sleeve, the bond between the two is not firm, especially when used at high temperature, the existing adhesive has po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J1/00C09J11/04
CPCC09J1/00C09J11/04
Inventor 高飞李林贺智勇彭小艳张彦祥
Owner 北京钢研新冶工程技术中心有限公司
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