Furnace-protecting anhydrous stemming

A technology of anhydrous taphole mud and raw materials, which is applied in the field of refractory materials, can solve problems such as the influence of hearth life, and achieve the effects of avoiding iron penetration, prolonging iron tapping time, and low shrinkage

Inactive Publication Date: 2012-01-18
ANSTEEL INDAL TIEYUAN REFRACTORY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Every day, the iron hole of the blast furnace has to be opened and filled many times, and the amount of molten gun mud entering the hearth will also increase, which will have a great impact on the life of the hearth

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The chemical composition and weight percentage content of the raw material of anhydrous taphole mud for furnace protection are:

[0018] Corundum powder 25%; coke powder 16%; clay powder 19%; silicon carbide powder 9%; asphalt powder 3%; anthracene oil 18%; titanium dioxide powder 10%.

[0019] Among them: Al in corundum powder 2 o 3 94.5%; SiC in silicon carbide powder is 95%; TiO in titanium dioxide powder 2 96.5%. The particle size of each solid raw material is 325 mesh, and the maximum particle size does not exceed 2.8mm.

Embodiment 2

[0021] The chemical composition and weight percentage content of the raw material of anhydrous taphole mud for furnace protection are:

[0022] Corundum powder 20%; coke powder 17%; clay powder 16%; silicon carbide powder 12%; asphalt powder 4%; anthracene oil 20%; titanium dioxide powder 11%.

[0023] Among them: Al in corundum powder 2 o 3 94%; SiC in silicon carbide powder is 95%; TiO in titanium dioxide powder 2 97%. The particle size of each solid raw material is 325 mesh, and the maximum particle size does not exceed 1.5mm.

Embodiment 3

[0025] The chemical composition and weight percentage content of the raw material of anhydrous taphole mud for furnace protection are:

[0026] Corundum powder 15%; coke powder 18%; clay powder 20%; silicon carbide powder 13%; asphalt powder 2%; anthracene oil 23%; titanium dioxide powder 9%.

[0027] Among them: Al in corundum powder 2 o 3 95%; SiC in silicon carbide powder is 94.5%; TiO in titanium dioxide powder 2 96.5%. The particle size of each solid raw material is 325 mesh, and the maximum particle size does not exceed 2.0mm.

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Abstract

The invention provides furnace-protecting anhydrous stemming which comprises the following raw material chemical components by weight: 15-25% of corundum powder; 15-20% of coke powder; 15-20% of clay powder; 9-14% of silicon carbide powder; 2-4% of asphalt powder; 15-25% of anthracene oil; and 9-11% of titanium dioxide powder. The stemming of the invention has the characteristics of high strength, low shrinkage, and good caking property, has stable high temperature resistance, can be sintered rapidly, can prolong tapping time and ensure tapping smoothness, provides an iron notch drilling-trhough rate of above 95%, avoids the iron-leaking phenomenon and accidents of iron notch fracture and channel enlargement due to a shallow iron notch, increases the smelting intensity, reduces production cost, and ensures the safe running of blast furnace production. Especially, a titanium sediment wear-resistant protection layer with a small thermal conductivity coefficient and good corrosion resistance is formed, which has the effect of protecting the hearth and the furnace wall near the iron notch, and thus prolongs the service life of the blast furnace hearth and the furnace wall.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to an anhydrous taphole mud which is used for sealing a blast furnace tap hole and has the function of protecting the furnace hearth. Background technique [0002] As a kind of refractory material for blast furnace taphole plugging, gun mud not only directly affects the smoothness of ironmaking production, but also plays a vital role in the safety of people and equipment and even the service life of the blast furnace. . Therefore, it is required that the taphole clay should not only have good plasticity and bonding properties to facilitate squeezing and filling the taphole channel; but also have appropriate porosity and volume shrinkage to facilitate gas discharge and avoid cracks; and It should have basic physical and chemical properties such as high strength and refractoriness, good erosion resistance and corrosion resistance. For this reason, domestic and foreign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 李海龙朱红东张新杜以安
Owner ANSTEEL INDAL TIEYUAN REFRACTORY MATERIALS
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