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Environment-friendly type carbonaceous press material for maintaining blast furnace hearth

An environmentally friendly blast furnace technology, applied in the field of ironmaking refractory materials, can solve environmental pollution and other problems, and achieve the effects of ensuring thermal conductivity, small linear expansion coefficient, and anti-erosion and penetration performance

Active Publication Date: 2013-08-14
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic binder will inevitably bring environmental pollution

Method used

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  • Environment-friendly type carbonaceous press material for maintaining blast furnace hearth

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Experimental program
Comparison scheme
Effect test

Embodiment

[0036] The above-mentioned various dry raw materials are weighed and batched according to the stated ratio, mixed evenly, then added with a liquid binder and stirred evenly, and can be applied at the production site after being sealed and packaged.

[0037]

Example 1

Example 2

Example 3

Electrode graphite 1-0mm

15

25

35

Flake graphite<0.074mm

32

26

20

Silicon carbide <0.074mm

11

8

4

Quartz<0.154mm

15

10

5

Boron carbide <0.044mm

3.0

2.0

1.0

Environmental modified tar 24~35

24

29

35

[0038] To analyze the performance of the pressed material, the material test method refers to the corresponding national standard or industry standard for refractory materials.

[0039] The measured value of the technical index of the press-feed material

[0040]

[0041] The environmentally friendly carbonaceous press-f...

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Abstract

The invention provides an environment-friendly type carbonaceous press material for a maintaining blast furnace hearth. The environment-friendly type carbonaceous press material comprises the following components by weight: 15-35% of electrode graphite, 20-32% of crystalline flake graphite, 4-11% of silicon carbide, 5-15% of quartz sand, 1.0-3.0% of boron carbide, and 24-35% of environmental protection modified tar, wherein the sum of the components is 100%. The various said dry raw materials, in the proportions, can be used in a production field after weighted, burdened, uniformly mixed, uniformly stirred with a liquid binder and sealedly packaged. The carbonaceous press material of the invention has advantages of good fluidity and fallibility, high density and intensity, high thermal conductivity, good anti-aggressivity to melt molten iron and slag, high temperature air-flow flushing resistance, and good anti oxidizability, and is especially in favor of raising a blast furnace life and in favor of safety production. The carbonaceous press material contains less poisonous and harmful substances like benzopyrene, and is in favor of environmental protection.

Description

technical field [0001] The invention relates to an environment-friendly carbonaceous press-in material for blast furnace maintenance, belonging to the technical field of ironmaking refractory materials. Background technique [0002] During the production process of the blast furnace, especially in the middle and late stages of the furnace operation, the lining of the furnace body will be damaged to varying degrees, and the furnace shell will be red hot, the cooling wall will be burned, and gas leakage will occur. Therefore, the timely maintenance of the furnace body in the middle and late stages of the furnace operation is an important guarantee for the long-life production of the blast furnace, and scientific furnace body maintenance technology is one of the main means to prolong the life of the blast furnace. As a technology to prolong the service life of blast furnaces, furnace shaft press-in maintenance has been widely used by domestic and foreign enterprises, and it has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 夏欣鹏甘菲芳陶卫忠朱锦明居勤章
Owner BAOSHAN IRON & STEEL CO LTD
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