Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials

A technology of waste refractory materials and anhydrous taphole mud, which is applied in the field of blast furnace anhydrous taphole mud, which can solve the problems of inability to ensure the smooth operation of the blast furnace, leakage of molten iron from molten blast furnace mud, and reduce the cost of blast furnace mud, achieving excellent slag resistance, Emission reduction and low cost effects

Inactive Publication Date: 2012-02-01
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two solutions only partially replace the corundum raw material and clay, which can only partially reduce the cost of the clay, and at the same time uncontrollably introduce alkaline impurities such as calcium oxide, sodium oxide, potassium oxide, and magnesium oxide, which are easy to mix with the cl...

Method used

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  • Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials
  • Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials
  • Method for producing waterless taphole mix for blast furnace from high-alumina waste refractory materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The waste refractory material used is the used blast furnace iron trough material, which is processed into particles and fine powder. The used blast furnace iron trough material contains 70.32% of alumina, 14.47% of silicon carbide and 2.85% of carbon. . All the raw materials of brown corundum and excellent bauxite in the original gun mud are replaced. Because they contain silicon carbide and carbon, they partially replace silicon carbide and coke powder. The mass percentage ratio of each component is as follows:

[0040] After used blast furnace iron trough material particles 5-3mm 10%

[0041] After use blast furnace iron trough material particles 3-1mm 20%

[0042] After use, the blast furnace iron trough material particles are less than 1mm 20%

[0043] After use, the blast furnace iron groove fine powder is less than 0.088mm 10%

[0044] Silicon carbide particles less than 1mm 2%

[0045] Silicon carbide fine powder is less than 0.088mm 5%

[0046] Coke powder 4%

[0047] Asp...

Embodiment 2

[0058] The used waste refractory material is the used ladle slide plate, which is processed into particles and fine powder. After use, the ladle slide plate has an alumina mass ratio content of 65.27% and a carbon mass ratio content of 6.85%. Most of them replace brown corundum and part of coke powder. The mass percentage ratio of each component is as follows:

[0059] After use, ladle slide particles 5-3mm 10%

[0060] After use, ladle slide particles 3-1mm 20%

[0061] After use, the ladle sliding plate particles are less than 1mm 20%

[0062] Brown corundum fine powder less than 0.088mm 12%

[0063] Silicon carbide particles less than 1mm 5%

[0064] Silicon carbide fine powder is less than 0.088mm 8%

[0065] Coke powder 3%

[0066] Asphalt powder 6%

[0067] Clay powder 10%

[0068] Silica powder 4%

[0069] Sericite powder 2%

[0070] The additional binder is tar, which accounts for 14% of the total mass of the ingredients.

[0071] After accurately weighing the various ingredients, add ...

Embodiment 3

[0076] The used waste refractory material is the combination of the used ladle seat brick and the used ladle breathable brick, the used ladle seat brick has an alumina mass ratio content of 88.38%, and the used ladle breathable brick alumina mass ratio content is 90.67%. The two are processed into granules and fine powder to replace the brown corundum and excellent bauxite raw materials in the gun mud. The mass percentage ratio of each component is as follows:

[0077] Ladle seat brick particles 5-3mm 10% after use

[0078] Ladle seat brick particles 3-1mm 15% after use

[0079] After use, the size of ladle seat bricks is less than 1mm 15%

[0080] After use, the fine powder of ladle breathable brick is less than 0.088mm 12%

[0081] Silicon carbide particles less than 1mm 5%

[0082] Silicon carbide fine powder less than 0.088mm 10%

[0083] Coke powder 8%

[0084] Asphalt powder 6%

[0085] Clay powder 10%

[0086] Kyanite powder 4%

[0087] Iron silicon nitride powder 5%

[0088] The exter...

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Abstract

The invention discloses a method for producing a waterless taphole mix for a blast furnace from high-alumina waste refractory materials. The produced low-cost waterless taphole mix can satisfy the operating requirements for plugging tapholes of large and medium blast furnaces. The method comprises the selection of raw materials for production, the processing of the raw materials for production, the proportioning of the raw materials for production, and the production process. The waterless taphole mix produced by the method has the characteristics of low cost, good plasticity and sintering property, high middle-and-high-temperature strength, favorable slag and iron erosion resistance and the like, and can completely satisfy the operating requirements of large and medium blast furnaces. Compared with the existing waterless taphole mix, the cost can be reduced by 40-60%; since a great amount of waste refractory materials are used, the emission of the solid waste can be decreased, and a great amount of high-quality refractory materials such as brown corundum, premium/extra grade alumina and the like can be saved; and meanwhile, the energy consumption and the emission of carbon dioxide gas during the smelting of brown corundum and premium/extra grade alumina can be decreased.

Description

Technical field [0001] The invention relates to a method for producing waterless gun mud for blocking the iron hole of a blast furnace. In particular, it is a method for producing anhydrous blast furnace mud by using waste refractories containing high alumina. Background technique [0002] Clay is an unshaped refractory material that must be used to block the iron hole of a blast furnace. According to the type of binder, it is divided into water and anhydrous. Water cannon mud can only be used for 450m 3 Around 90% of the blast furnaces use anhydrous mud, and the annual consumption is about 500,000 tons. Anhydrous gun mud has the advantages of high high temperature strength, erosion resistance, not easy to ream, and not easy to wet iron holes. Different manufacturers use different raw materials to produce anhydrous gun mud, mainly brown corundum, alumina, mullite, silicon carbide, ferrosilicon nitride, coke powder, clay, sericite, kyanite, pyrophyllite, flake graphite , Asphal...

Claims

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Application Information

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IPC IPC(8): C04B35/66B09B3/00
Inventor 李志坚魏金士吴锋李心慰徐娜
Owner UNIV OF SCI & TECH LIAONING
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