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Additives for taphole clay to suppress spattering of iron holes

A technology of sputtering and additives in the taphole, applied in the field of metallurgical refractory materials, can solve the problems of irregular taphole ducts, leakage, cracked gas, etc., and achieves the reduction of the high temperature strength difference, the improvement of thermal shock stability, and the improvement of strength reduction. Effect

Inactive Publication Date: 2016-01-20
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Blast furnace tap hole splashing phenomenon is one of the problems that often occur in the blast furnace ironmaking process. The reasons for splashing may include: gas leakage due to the cracking of the combined brick joints of the tap hole; Cracks in the tunnels lead to gas leakage; cracks in the gun mud due to volume shrinkage at high temperature lead to gas leakage; wet mud; cooling water leakage; poor uniformity of the hearth working state, coke accumulation, and gas downward; iron Irregular openings, etc.

Method used

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  • Additives for taphole clay to suppress spattering of iron holes
  • Additives for taphole clay to suppress spattering of iron holes
  • Additives for taphole clay to suppress spattering of iron holes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 4

[0028] In Examples 1-4, each component of the additive for gun mud was accurately weighed according to the weight parts shown in Table 2, and after stirring in a mixer for 3-10 minutes, it was packaged. Usually it is 25kg per bag. Pay attention to moisture and rain during storage and transportation. When applied to the corresponding gun mud products, the operation is carried out in the form of powder addition.

[0029] Table 2

[0030]

[0031] 2. Use the additive for shot mud to inhibit iron spatter of the present invention to prepare shot mud

preparation example 1

[0033] Its components and parts by weight are: 20 parts of alumina particles; 10 parts of alumina powder; 10 parts of silicon carbide; 20 parts of coke; 7 parts of quartz sand; 18 parts of clay; 15 parts of additives for gun clay; and

[0034] The binder is 14 parts of tar and 2 parts of phenolic resin.

[0035] The above components are accurately weighed in parts by weight. First, the granules are stirred in a mixer for 2-3 minutes, then add 30wt% tar, and stir for 5 minutes, then add the fine powder and stir for 10 After adding phenolic resin and the remaining tar binder, stir for 30 minutes to make the binder fully wet the dry material. Use a Marcia meter to determine the Marcia value. When it has suitable plasticity, it can be extruded and packaged by an extruder.

preparation example 2

[0037] Its components and parts by weight are: 25 parts of bauxite particles; 13 parts of alumina powder; 12 parts of silicon carbide; 18 parts of coke; 5 parts of quartz sand; 15 parts of clay; 12 parts of additives for gun clay; and

[0038] The binding agent is 10 parts of tar and 4 parts of phenolic resin.

[0039] The above components are accurately weighed in parts by weight, the granules are first stirred in a mixer for 2-3 minutes, and then 40wt% tar is added, and then stirred for 5 minutes, then the fine powder is added and stirred for 10 After adding phenolic resin and the remaining tar binder, stir for 30 minutes to make the binder fully wet the dry material. Use a Marcia meter to determine the Marcia value. When it has suitable plasticity, it can be extruded and packaged by an extruder.

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Abstract

The invention belongs to the technical field of metallurgical refractory matters and relates to an additive for stemming for inhibiting iron notch splash. The additive comprises the following components in parts by weight: 1-3 parts of silicon metal, 0.4-0.6 part of boron carbide, 2-8 parts of asphalt, 0-5 parts of silicon nitride and 2-8 parts of kyanite. When the additive for stemming for inhibiting iron notch splash disclosed by the invention is added into the stemming, a proper amount of glass phase components can be generated at high temperature, and possible cracks generated in an iron notch channel can be plugged by the glass phase contacted with molten iron under the condition that the high-temperature performance is not influenced, so that splash caused by gas channeling is effectively prevented. Moreover, the additive has the advantages of proper micro expansion effect, medium and high temperature strength, slag iron erosion resistance and oxidation resistance.

Description

Technical field [0001] The invention belongs to the technical field of metallurgical refractory materials, and relates to an additive for blasting mud, and more specifically, to an additive for blasting mud for inhibiting iron spout. Background technique [0002] Blast furnace taphole splashing is one of the frequent problems in the blast furnace ironmaking production process. The reasons for the splashing may be: gas leakage due to the cracking of the taphole combination bricks; the tapping machine impacts the taphole during the opening process Cracks in the pores cause gas leakage; cracks in the blast mud due to volume shrinkage at high temperatures cause gas leakage; turbid mud damp; cooling water leakage; poor uniformity in the working state of the hearth, coke accumulation, and gas downward; iron Irregular pores, etc. [0003] In recent years, with the continuous improvement of the smelting intensity of blast furnaces, the taphole splash phenomenon has become an increasingly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/6303C04B35/63496C04B2235/3821C04B2235/3873C04B2235/428
Inventor 张雯文刘兴平范咏莲唐勋海赵军邱海龙张正富张君博徐自伟陈博郑江徐炎慧
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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