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Dot-matrix type brick inlaid cooling wall and preparation process thereof

A cooling stave and dot-matrix technology, applied in cooling devices, blast furnace parts, furnaces, etc., can solve the problems of affecting the service life of staves, poor heat dissipation conditions of refractory bricks, and high temperature of refractory bricks, so as to reduce the types of bricks, Avoid cracks of refractory bricks and prolong service life

Active Publication Date: 2014-12-10
探宇冶金技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the thermal conductivity of refractory bricks is only (1~15) w / (m k), and the contact surface with the metal body is covered with fibrous aluminum silicate material or refractory mud with very low thermal conductivity, the heat dissipation of refractory bricks poor condition
Under the working conditions of the blast furnace, the temperature of the refractory bricks will be very high, which is not conducive to the formation of stable slag skin on the hot surface of the stave, which seriously affects the service life of the stave;
[0010] 4. Since the refractory bricks of the stave are arranged in strips, the slag skin layer formed on the hot surface of the stave is as follows: Figure 12 The thickness shown is uneven, and it is easy to fall off after being impacted and rubbed by the charge, and it will take a long time to re-slag after falling off

Method used

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  • Dot-matrix type brick inlaid cooling wall and preparation process thereof
  • Dot-matrix type brick inlaid cooling wall and preparation process thereof
  • Dot-matrix type brick inlaid cooling wall and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Dot-matrix brick-inlaid ductile iron staves, refractory bricks are high-alumina bricks. Manufactured by the hot brick laying process, including the following steps:

[0054] The first step: refractory brick preparation

[0055] Prepare trapezoidal high alumina bricks as required;

[0056] The second step of refractory brick coating

[0057] Mix 1 part by weight of iron powder with a particle size of 50 mesh and 0.2 parts by weight of water glass with a density of 1.2 and a modulus of 2.0, and then stir evenly in a mixer; use a dip coating process to brush the iron powder and water glass on the mosaic part of the refractory brick. Buffer material composed of mixed liquid, brushing thickness 1mm, drying at 200°C for 8 hours after painting, ventilation should be carried out during drying to improve drying effect;

[0058] The third step: firebrick inlay

[0059] Arrange the refractory bricks in a staggered matrix in the cooling stave casting cavity, fix the refractory ...

Embodiment 2

[0061] Dot-matrix brick-inlaid ductile iron staves, refractory bricks are silicon carbide bricks. Manufactured by the hot brick laying process, including the following steps:

[0062] The first step: refractory brick preparation

[0063] Prepare rectangular silicon carbide bricks as required;

[0064] The second step of refractory brick coating

[0065] Mix 1 part by weight of copper powder with a particle size of 75 mesh and 0.4 part by weight of water glass with a density of 1.35 and a modulus of 2.4, and then stir evenly in a mixer; use a brushing process to paint the inlaid part of the refractory brick. Buffer material composed of mixed solution, with a thickness of 1.5mm, after painting, dry at 250°C for 12 hours, and ventilate during drying to improve the drying effect;

[0066] The third step: firebrick inlay

[0067] Arrange the refractory bricks in a staggered matrix in the cooling stave casting cavity, fix the refractory bricks with metal supports, then pour molt...

Embodiment 3

[0069] Dot matrix brick-inlaid nodular cast iron stave, refractory bricks are aluminum carbon bricks. Manufactured by the hot brick laying process, including the following steps:

[0070] The first step: refractory brick preparation

[0071] Prepare convex-shaped aluminum-carbon bricks as required;

[0072] The second step of refractory brick coating

[0073] Mix 1 part by weight of iron powder with a particle size of 100 mesh and 0.6 parts by weight of water glass with a density of 1.5 and a modulus of 2.8, and then stir evenly in a mixer; use dipping or brushing technology to paint the mosaic part of the refractory brick with metal powder and Buffer material composed of water glass mixture, with a coating thickness of 2 mm, dried at 300 ° C for 16 hours after coating, and ventilation should be carried out during drying to improve the drying effect;

[0074] The third step: firebrick inlay

[0075] Arrange the refractory bricks in a staggered matrix in the cooling stave c...

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Abstract

The invention belongs to the technical field of a cooling wall of a blast furnace and discloses a dot-matrix type brick inlaid cooling wall and a preparation process thereof. The dot-matrix type brick inlaid cooling wall is mainly and technically characterized by comprising a cooling wall body, wherein refractory bricks are inlaid in the inner wall of the cooling wall body; and the inlaid parts of the refractory bricks are arranged in the inner wall of the cooling wall body in a matrix staggered mode. In addition, the dot-matrix type brick inlaid cooling wall is technically characterized in that buffering coatings are arranged on the inlaid parts of the refractory bricks; and the refractory bricks are shaped like trapezoid, rectangle or a Chinese character 'Tu' (meaning convex). The dot-matrix type brick inlaid cooling wall provided by the invention adopts a dot-matrix type brick inlaying structure, the cast-in parts of the refractory bricks are arranged in a matrix staggered mode, and each brick inlaying point is realized by a whole brick, so that cracks of the refractory bricks, caused by the fact that iron is drilled among the refractory bricks, during hot inlaying are avoided; and liquid iron slag generated during iron making can easily form a uniform slag skin attaching to the hot surface of the cooling wall, so that a protective effect on the cooling wall is achieved, and the service life of the cooling wall body and further the service life of the blast furnace are prolonged.

Description

technical field [0001] The invention belongs to the technical field of blast furnace staves, and in particular relates to a dot-matrix brick-embedded stave and a preparation process thereof. Background technique [0002] The structural form of the brick-inlaid stave of the blast furnace is that refractory bricks are inlaid in the channel on the inner wall of the stave, that is, the hot surface. The current refractory bricks are as follows: figure 1 , 2 , 3, and 4, the stave body 1 is provided with refractory bricks 2 and cooling water pipes 3, the refractory bricks 2 are arranged in strips, and all or part of the refractory bricks 2 are embedded in the through groove to form a half-covered brick-inlaid stave and a full-coverage Bricked cooling walls. [0003] There are two process methods for stave inlaid bricks: [0004] 1. Cold mounting: When manufacturing the cooling wall, a through groove is reserved on the hot surface of the cooling wall according to the design requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/10C21B7/06
Inventor 沈猛铁金艳
Owner 探宇冶金技术(上海)有限公司