Long-service-life lining material for whole pipeline of large and medium sized blast furnace hot blast stove

A hot blast stove, long-life technology, applied in the field of refractory materials and blast furnace pipeline lining materials, can solve the problems of easy cracking, deformation and collapse of lining materials, and achieve good thermal shock stability, good toughness and expansion stability. , the effect of improving the service life

Inactive Publication Date: 2014-01-22
任健均
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the lining material of the large and medium-sized hot blast furnace pipes in the prior art is prone to cracking, collapse and deformation caused by long-term high temperature of 1200-1300°C, frequent temperature fluctuations, and hot air erosion of high-speed alkali-containing and carbon-containing media technical problem, the purpose of the present invention is to provide a long-life integral pipeline lining material for large and medium-sized blast furnace hot blast stoves

Method used

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  • Long-service-life lining material for whole pipeline of large and medium sized blast furnace hot blast stove
  • Long-service-life lining material for whole pipeline of large and medium sized blast furnace hot blast stove
  • Long-service-life lining material for whole pipeline of large and medium sized blast furnace hot blast stove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A long-life integrated pipeline lining material for large and medium-sized blast furnace hot blast stoves, which includes a permanent lining and a working lining. The permanent lining is formed by pouring the base material with the following components and contents and baking at 150°C for 100 hours , the base material contains 40wt% of microporous aggregate with a particle size of 5mm or less, 10wt% of polypropylene balls with a particle size of 0.2mm or less, 20wt% of primary alumina with a particle size of 0.074mm or less, and α-oxidized spheres with a particle size of 0.001mm or less. 6wt% aluminum, 6wt% silica powder with a particle size below 0.001mm, 10wt% calcined kaolin with a particle size below 0.074mm, and 8wt% CA80 cement;

[0028] The working lining is formed by pouring the base material with the following components and content and baking at 150°C for 100 hours. The base material contains 10wt% of 8-5mm M70 sintered fused mullite with a particle size of 5 ...

Embodiment 2

[0030] A long-life integrated pipeline lining material for large and medium-sized blast furnace hot blast stoves, which includes a permanent lining and a working lining. The permanent lining is formed by pouring the base material with the following components and contents and baking at 1150°C for 15 hours , the base material contains 50wt% of microporous aggregate with a particle size of 5mm or less, 10wt% of polypropylene balls with a particle size of 0.2mm or less, 10wt% of primary alumina with a particle size of 0.074mm or less, and α-oxidized spheres with a particle size of 0.001mm or less. 6wt% of aluminum, 6wt% of silica powder with a particle size of 0.001mm or less, 10wt% of calcined kaolin with a particle size of 0.074mm or less, 7.97wt% of CA80 cement and 0.03wt% of sodium tripolyphosphate;

[0031] The working lining is made by pouring the base material with the following components and content and baking at 1150°C for 15 hours. The base material contains 15 wt% of 8...

Embodiment 3

[0033] A long-life integrated pipeline lining material for large and medium-sized blast furnace hot blast stoves, which includes a permanent lining and a working lining. The permanent lining is formed by pouring the base material with the following components and contents and baking at 150°C for 100 hours , the base material contains 55wt% of microporous aggregate with a particle size of 5mm or less, 12wt% of polypropylene balls with a particle size of 0.2mm or less, 13wt% of primary alumina with a particle size of 0.074mm or less, and α-oxidized spheres with a particle size of 0.001mm or less. 3wt% of aluminum, 5wt% of silica powder with a particle size of 0.001mm or less, 7wt% of calcined kaolin with a particle size of 0.074mm or less, 4.97wt% of CA80 cement and 0.03wt% of sodium tripolyphosphate;

[0034] The working lining is formed by pouring the base material with the following components and content and baking at 150°C for 100 hours. The base material contains 10wt% of 8...

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Abstract

The invention relates to a long-service-life lining material for a whole pipeline for a large and medium sized blast furnace hot blast stove. The lining material comprises a permanent lining and a work lining, wherein the permanent lining and the work lining are respectively formed by casting and baking a substrate-purified high-intensity micro-pore light material and a substrate-purified high-intensity mullite material. The lining material provided by the invention can solve the technical problem that the lining material of the large and medium-sized blast furnace hot blast stove in the prior art is easy to crack, collapse and deform due to being subjected to high temperature of 1200-1300 DEG C, frequent temperature fluctuation and high-speed alkali-containing and carbon medium-containing hot air erosion for a long term. After a hot air stove pipeline having the safety lining and the work lining is used, the service life of the hot air stove pipeline can be observably prolonged, the stop time for repairing can be reduced, and the production efficiency can be greatly improved, so that the lining material is huge in economic benefit and social benefit.

Description

technical field [0001] The invention relates to a refractory material, in particular to a blast furnace pipeline lining material, which is especially suitable as a long-life integral pipeline lining material for large and medium-sized blast furnace hot blast stoves. Background technique [0002] The longevity of blast furnaces is not only a requirement for iron and steel enterprises to maintain stable production, but also a requirement for reducing costs and improving market competitiveness. Therefore, the service life of blast furnaces is one of the most concerned issues for ironworkers all over the world. The ironmaking blast furnace hot blast pipeline is the hot blast channel connecting the hot blast stove and the blast furnace, and is a key facility for blast furnace smelting. In recent years, we have found that many large and medium-sized blast furnaces cracked, peeled off, or even fell off in a large area in the refractory lining in the hot blast main pipe shortly afte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 任健均
Owner 任健均
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