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Long-life blast furnace hearth

A blast furnace and longevity technology, applied in blast furnaces, blast furnace details, blast furnace parts and other directions, can solve problems such as blast furnace hearth erosion, hearth burn-through, etc., to reduce pig iron costs, promote development, and avoid hearth burn-through. Effect

Inactive Publication Date: 2014-01-15
ANGANG STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0006] However, no matter how the inner shape of the blast furnace evolves, the inner shape of the blast furnace hearth is always a flat-bottomed cylinder. As the age of the blast furnace increases, the blast furnace hearth is prone to "elephant foot" erosion, which eventually leads to burn-through of the hearth

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  • Long-life blast furnace hearth
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specific Embodiment approach

[0022] Take a certain 3200m 3 Take a blast furnace as an example, the diameter of hearth 1 of the blast furnace is 12.4m, and the height of the ball is 4.4m. According to the calculation formula given by the technical scheme, R = (A 2 +4B 2 ) / (8B), in the above formula, A is the diameter of the hearth, B is the height of the spherical gap, that is, the total height of the carbon bricks around the hearth, and the radius of the sphere can be obtained R = 6.57m;

[0023] Then according to the calculation formula given by the technical scheme, the hearth diameter of each layer of carbon bricks is: a=2(R 2 -(Σb) 2 ) 1 / 2 , in the above formula, R is the radius of the sphere, b is the thickness of the carbon brick, which is also the thickness of each layer; the hearth diameter of each layer of the hearth 1 and the ring of carbon bricks 2 can be obtained.

[0024] Table 1 shows the diameter of hearth determined by laying carbon bricks 2 on each layer of hearth 1, the number of r...

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Abstract

The invention discloses a long-life blast furnace hearth including annularly layering carbon bricks, in the blast furnace hearth, the volume of a part from the furnace bottom to an iron notch is a spherical segment shape, the spherical centre of the spherical segment shape is located in the central axis of the blast furnace, the sphere radius of the spherical segment shape is R = (A<2>+ 4B<2>) / (8B), wherein A is the hearth diameter, B is the spherical segment height, namely the total height of the annularly layering carbon bricks of the hearth. "Elephant foot" erosion of the blast furnace hearth can be greatly inhibited, hearth breakout can be avoided as far as possible, and in the daily operation of a blast furnace, feeding of furnace protection materials such as schreyerite and the like can be cancelled, so that the cost of pig iron can be reduced, the development of varieties of rolled steel can be promoted.

Description

technical field [0001] The invention belongs to the technical field of ironmaking blast furnaces, and in particular relates to an inner shape of a blast furnace hearth. Background technique [0002] The internal shape of blast furnace plays an important role in blast furnace smelting. A reasonable internal shape can promote the improvement of economic and technical indicators of blast furnace, otherwise it will be affected. A reasonable internal shape must be compatible with the conditions of the furnace material, the air supply system, the habitual operation system and the law of motion in the furnace in order to obtain the best smelting effect. [0003] The reasonable inner shape comes from production practice. In fact, the selection of the size of each part of the inner shape of the blast furnace in each factory is based on the calculation results and the inner shape analysis and comparison of the same type of blast furnace, and is selected according to the specific condi...

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Application Information

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IPC IPC(8): C21B7/02C21B7/06
Inventor 王相力王再义张伟张立国邓伟任伟赵东明
Owner ANGANG STEEL CO LTD
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