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High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline

A technology of high temperature resistance and thermal shock resistance, applied in the field of refractory materials, can solve the problems of easy damage of pipelines, achieve the effects of improving thermal shock resistance, improving high temperature mechanical properties, and enhancing mechanical properties

Active Publication Date: 2015-02-04
ZHENGZHOU ANNEC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that blast furnace hot blast stove pipes are easily damaged by thermal shock stress, thermal expansion and contraction force and blind plate force in the prior art, and to provide a new type that does not require pre-firing and can maintain good resistance to heat for a long time. High-temperature-resistant and thermal-shock-resistant pipe for ironmaking hot blast stove with thermal shock and mechanical properties, and its preparation method

Method used

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  • High-temperature resistant thermal shock resistant pipeline used in iron-making hot blast heater and preparation method of high-temperature resistant thermal shock resistant pipeline

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Experimental program
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Effect test

Embodiment 1

[0023] A high-temperature-resistant and thermal-shock-resistant pipe for an iron-making hot blast stove. The raw materials are composed of: 15 parts of high-alumina bauxite particle clinker with a particle size of 8-5 mm and high-alumina bauxite particles with a particle size of 5-3 mm in parts by weight. 20 parts of clinker, 15 parts of andalusite with a particle size of 3~1mm, 20 parts of andalusite with a particle size of 1~0.074mm, 7 parts of andalusite with a particle size of 200 mesh, 9 parts of brown corundum fine powder with a particle size of 300 mesh, CA-70 pure Calcium aluminate cement 4 parts, α-Al with particle size ≤ 5 microns 2 o 3 3 parts powder, ρ-Al 2 o 3 2 parts of powder, SiO with particle size ≤ 1 micron 2 5 parts of fine powder; In addition, 0.1 part of sodium tripolyphosphate and 0.05 part of sodium hexametaphosphate, 0.05 part of organic explosion-proof fiber and 1.0 part of heat-resistant stainless steel fiber were added.

[0024] A method for prep...

Embodiment 2

[0032] A high-temperature-resistant and thermal-shock-resistant pipe for an ironmaking hot blast stove, the raw materials of which are composed of: 20 parts of high-alumina bauxite particle clinker with a particle size of 8-5 mm and high-alumina bauxite particles with a particle size of 5-3 mm in parts by weight 20 parts of clinker, 15 parts of andalusite with a particle size of 3~1mm, 15 parts of andalusite with a particle size of 1~0.074mm, 5 parts of andalusite with a particle size of 200 mesh, 8 parts of brown corundum fine powder with a particle size of 300 mesh, CA-70 pure Calcium aluminate cement 3 parts, α-Al with particle size ≤ 5 microns 2 o 3 5 parts powder, ρ-Al 2 o 3 3 parts of powder, SiO with particle size ≤ 1 micron 2 6 parts of fine powder; in addition, 0.15 parts of sodium hexametaphosphate and 0.15 parts of organic explosion-proof fiber were added.

[0033] A method for preparing a high-temperature-resistant and thermal-shock-resistant pipeline for an ir...

Embodiment 3

[0035] A high-temperature-resistant and thermal-shock-resistant pipe for an iron-making hot blast stove. The raw materials are composed of: 18 parts of high-alumina bauxite particle clinker with a particle size of 8-5 mm and high-alumina bauxite particles with a particle size of 5-3 mm in parts by weight. 20 parts of clinker, 12 parts of andalusite with a particle size of 3~1mm, 18 parts of andalusite with a particle size of 1~0.074mm, 7 parts of andalusite with a particle size of 200 mesh, 9 parts of brown corundum fine powder with a particle size of 300 mesh, CA-70 pure Calcium aluminate cement 2 parts, α-Al with particle size ≤ 5 microns 2 o 3 4 parts powder, ρ-Al 2 o 3 3 parts of powder, SiO with particle size ≤ 1 micron 2 7 parts of fine powder; In addition, 0.20 parts of sodium tripolyphosphate, 0.10 parts of organic explosion-proof fiber and 1.0 part of heat-resistant stainless steel fiber were added.

[0036] A method for preparing a high-temperature-resistant and ...

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Abstract

The invention discloses a high-temperature resistant thermal shock resistant pipeline used in an iron-making hot blast heater, and relates to the technical field of refractory materials. The high-temperature resistant thermal shock resistant pipeline is prepared from bauxite chamotte clinker granules, andalusite, fine corundum powder, pure calcium aluminate cement, Al2O3 micro powder, SiO2 micro powder, a dispersing agent, organic anti-explosion fiber and stainless steel fiber, wherein andalusite consists of fine powder of 200 meshes and granules of 3-0.074mm; and the weight of the granules of 3-0.074mm is greater than 65% of the total weight of andalusite. A preparation method of the high-temperature resistant thermal shock resistant pipeline comprises the following steps: performing on-site casting or preparing the above raw materials into precast blocks, and subsequently combining and building the precast blocks on site. The mullitization of andalusite is a lasting process, columnar and needle-shaped mullite converted from andalusite can be formed into pilotaxitic texture with other raw materials and can be solidly combined, and when a raw material product is broken because of thermal stress and other mechanical stress, a bridging and toughening function is achieved, and the thermal shock resistance of the raw material product is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a high-temperature-resistant and thermal-shock-resistant pipe for an ironmaking hot blast stove and a preparation method thereof. Background technique [0002] The hot blast stove pipe is composed of hot air outlet, branch pipe, front main pipe, vertical pipe, rear main pipe, hot air surrounding pipe and air supply device. The hot air outlet and the above-mentioned pipes are connected to form a three-way pipe. At present, it is generally made of composite bricks. , that is, according to the overall structure of the hot air outlet and the three-way intersection, use computer three-dimensional technology to decompose into individual bricks, and make a piece of fired brick through batching, mixing, molding and firing. Combined together, then numbered, dismantled and packaged, and after being transported to the site, the bricks are reassembled on the hot blast stove to f...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3222C04B2235/3418C04B2235/3463C04B2235/447C04B2235/5212C04B2235/5216C04B2235/5427C04B2235/5436
Inventor 李富朝孙庚辰张玉涛樊旭光
Owner ZHENGZHOU ANNEC IND
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