Stemming for inhibiting splashing of iron notch

A technology of tap hole splashing and blast mud, which is applied in the field of metallurgical refractory materials, can solve the problems that affect the life of the tap hole and the state of tapping, the blast furnace can not normally tap iron, and the blast mud is prone to cracks, etc., to achieve appropriate micro-expansion performance, The effect of avoiding volume shrinkage and reducing joint gaps

Inactive Publication Date: 2015-01-14
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

Gun mud is used as the plugging material of the tap hole, and its quality directly affects the life of the tap hole and the state of the iron. At present, the blast furnace mud used in the blast furnace is prone to cracks after high temperature, and the stress generated by the temperature change of each tapping Cracks will be generated inside the residual clay. During the rapid drying and sintering process of the new clay, pores will be generated due to the volatilization of moisture and binder, and gaps will easily be generated near the contact surface.
The cracks generated in the hole of the tap hole are easy to form a path with the intruding gas, which makes the sprayed tap hole more serious, or even deteriorates the tap hole, so that the blast furnace cannot tap iron normally.

Method used

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  • Stemming for inhibiting splashing of iron notch
  • Stemming for inhibiting splashing of iron notch
  • Stemming for inhibiting splashing of iron notch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1- Embodiment 4

[0035] In Examples 1-4, each component of the additive for gun clay was accurately weighed according to the parts by weight shown in Table 2, stirred in a mixer for 3-10 minutes, and then packaged. Normally it is 25kg per bag. Pay attention to moisture and rain during storage and transportation. When applied to the corresponding gun clay products, it is operated in the form of adding powder.

[0036] Table 2

[0037]

[0038] two. Preparation of taphole clay with additives for suppressing sputtering of iron holes

preparation example 1

[0040] Its components and parts by weight are: 20 parts of bauxite particles; 10 parts of alumina powder; 10 parts of silicon carbide; 20 parts of coke; 7 parts of 120 mesh quartz sand; 18 parts of clay; 15 parts of additives for splashed gunpowder; and

[0041] The binder is 14 parts of tar, and 2 parts of phenolic resin with a curing temperature of 150°C to 200°C.

[0042] Accurately weigh the above-mentioned components by weight, first stir the granular material in the mixer for 2-3 minutes, and then add tar with a tar content of 30wt%, and then stir for 5 minutes, then add the fine powder and stir for 10 minutes. Minutes, then add phenolic resin and the remaining tar binder and stir for 30 minutes to make the binder fully wet the dry material, measure the Masha value with a Masha instrument, and when it has suitable plasticity, it will be extruded and packaged through a mud extruder.

preparation example 2

[0044] 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 120 mesh quartz sand; 15 parts of clay; 12 parts of additives for splashed gunpowder; and

[0045] The binder is 10 parts of tar, 4 parts of phenolic resin with a curing temperature of 150°C to 200°C.

[0046] Accurately weigh the above-mentioned components by weight, firstly stir the granules in the mixer for 2-3 minutes evenly, then add tar with a tar content of 40wt%, and stir for another 5 minutes, then add the fine powder and stir for 10 minutes Minutes, then add the resin and the remaining tar binder and stir for 30 minutes to make the binder fully wet the dry material, measure the Masha value with a Masha instrument, and when it has suitable plasticity, it will be extruded and packaged through a mud extruder.

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Abstract

The invention relates to stemming for inhibiting the splashing of an iron notch. The stemming comprises the following components in parts by weight: 15-25 parts of high-aluminum granules, 10-15 parts of alumina powder, 10-25 parts of silicon carbide, 13-20 parts of coke, 2-7 parts of quartz sand, 10-18 parts of clay, 12-20 parts of additives, 7-14 parts of tar and 2-7 parts of phenolic resin, wherein the additives comprise the following components in parts by weight: 1-3 parts of metallic silicon, 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. The stemming disclosed by the invention is capable of generating a proper quantity of glass phase components at a high temperature; under the precondition that high temperature property is not influenced, the layer of glass phase in contact with molten iron can effectively plug various crackles of an iron notch channel and thus can prevent the splashing caused by gas moving; in addition, the stemming has the advantages of proper microdilatancy effect and medium-high temperature intensity.

Description

technical field [0001] The invention belongs to the technical field of metallurgical refractory materials, and relates to a gun mud for suppressing sputtering of an iron hole. Background technique [0002] At present, the main function of anhydrous taphole mud for blast furnace taphole is to block the taphole, and the goals pursued are mostly erosion resistance, corrosion resistance, easy opening, combination of new and old taphole mud, and tapping time. In recent years, with the continuous improvement of blast furnace smelting intensity and the development of large-scale blast furnace smelting technology, the daily iron output of blast furnaces can reach tens of thousands of tons, and the load on the taphole is increasing. There is sputtering in the iron hole, especially in large blast furnaces. When the splash is serious, the slag and iron of the blast furnace will not be clean, or even the iron hole will not be blocked. This not only increases the operation difficulty an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66
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王永力
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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