Ramming material used in clearance at the bottom of blast furnace crucible
A technology for ramming material and blast furnace, which is applied in the field of all-natural graphite ramming material, and can solve the problems such as the raw material ratio cannot be found, and it is in a confidential state.
Inactive Publication Date: 2012-12-12
武钢集团有限公司
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AI Technical Summary
Problems solved by technology
[0005] At present, the raw material ratio of carbon ramming materials cannot be found, and most of them are kept secret
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0014] A kind of ramming material used for blast furnace hearth bottom gap, its raw material composition and mass percentage are: massive natural graphite: 23% for particle size 1-3mm, 50% for particle size 0.074-1<mm, 50% for particle size< 0.074 mm is 27%; in addition add 20% thermosetting phenolic resin of the total mass of natural graphite.
Embodiment 2
[0016] A kind of ramming material for blast furnace hearth bottom gap, its raw material composition and mass percentage are: flake natural graphite: 28% for particle size 1-3mm, 48% for particle size 0.074-1<mm, 48% for particle size< 0.074 mm is 24%; add 17.5% thermosetting phenolic resin of the total mass of natural graphite in addition.
Embodiment 3
[0018] A kind of ramming material used for blast furnace hearth bottom gap, its raw material composition and mass percentage are: earthy natural graphite: 25% for particle size 1-3mm, 53% for particle size 0.074-1
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Abstract
The invention relates to a ramming material used in clearance at the bottom of blast furnace crucible, which solves the problems that in the prior art, the thermal conductivity of the carbon ramming material is not matched with the thermal conductivity of the carbon brick, and the ramming material forms a heat-conducting insulation layer, thereby affecting the service life of the blast furnace. The raw materials of the ramming material are as follows by mass percentage: natural graphite: 23-28 percent of natural graphite with the particle size being 1-3mm, 48-53 percent of natural graphite with the particle size being 0.074-1mm, and 22-27 percent of natural graphite with the particle size being less than 0.074mm; and thermosetting phenolic resin of 15-20 percent of the total mass of the natural graphite. The ramming material of the invention is prepared with the all-natural graphite, the detected thermal conductivity of the ramming material reaches above 18W / mK after the ramming material is cured at 110 DEG C and can be well matched with the thermal conductivity of the carbon brick, thereby facilitating prolonging of the service lives of the hearth and bottom of the blast furnace.
Description
technical field [0001] The invention relates to a carbon ramming material used for the hearth bottom of a blast furnace, and belongs to a full-body ramming material used for filling gaps between carbon bricks and staves at the hearth bottom of a blast furnace, and between carbon bricks and a sealing plate at the bottom of a furnace Natural graphite ramming mass. The ramming mass has a high thermal conductivity under low temperature curing. Background technique [0002] The main function of the blast furnace carbon ramming material is to fill the gap between the carbon brick and the cooling wall, and between the furnace bottom carbon brick and the furnace bottom sealing plate. It plays an important role in transferring heat. The cooling of the blast furnace needs to transfer the heat of the carbon brick through the carbon ramming material, and take it away with the cooling water to slow down the erosion rate. If the thermal conductivity of blast furnace carbon ramming mater...
Claims
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IPC IPC(8): C04B35/66
Inventor 邹祖桥邓棠李勇波张正东宋木森
Owner 武钢集团有限公司