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Ramming material for iron notch of smelting reduction furnace

A technology of ramming material and taphole, which is applied in the field of refractory materials, can solve the problems of large outflow of molten iron, easy shallowing of the taphole area, and affecting the service life of the taphole, so as to achieve good plasticity and construction performance, and improve strength and corrosion resistance, the effect of improving the service life

Active Publication Date: 2014-07-23
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the particularity of the furnace operation process involved in this technology, the erosion and erosion of the taphole area of ​​the hearth of this type of smelting reduction furnace is serious, the outflow of molten iron is large, and the taphole area is easy to become shallow, which greatly affects the service life of the taphole

Method used

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  • Ramming material for iron notch of smelting reduction furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5

[0038] Dosing according to the ingredient distribution ratio shown in Table 1; after mixing uniformly for 10 minutes, add thermosetting phenolic resin as an anhydrous binder to combine the chemical components together; stir and roll for 15 minutes; seal and pack in blocks.

[0039] Table 1

[0040]

[0041] After firing the ramming material for the taphole of the smelting reduction furnace in Examples 1-5 at 1450° C. for 3 hours, the technical parameters were measured, and the test method was referred to the corresponding national standard or industry standard for refractory materials. Table 2 lists the technical parameters of the physical properties of the ramming material for the taphole of the smelting reduction furnace in Examples 1-5 after testing.

[0042] Table 2

[0043]

comparative example

Example 1

Example 2

Example 3

Example 4

Example 5

Compressive strength, MPa

32.8

63.6

57.4

60.9

61.1

59.6

...

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PUM

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Abstract

The invention discloses a ramming material for an iron notch of a smelting reduction furnace; the ramming material is Al2O3-SiC-Si3N4 ramming ramming material, and comprises the following chemical components by mass: 10-18% of bauxite; 10-32% of electricly-fused corundum; 6-16% of andalusite; 21-30% of silicon carbide powder; 3-10% of silicon nitride powder; 4-10% of alumina micro powder; 3-8% of bentonite; and 1-3% of boron carbide powder; and the chemical components are boned together by an externally added anhydrous binder. The ramming material for the iron notch of the smelting reduction furnace has high density, high strength, good resistance to high temperature melting slag, molten iron scouring resistance, resistance to slag corrosion, oxidation resistance and the like, is good in plasticity and construction performance, and can improve the smelting reduction furnace service life, improve safe production of the smelting reduction furnace, reduce the repair and downtime of the smelting reduction furnace, and avoid reducing of the iron and steel production.

Description

technical field [0001] The invention relates to a refractory material, in particular to a refractory material applied to a smelting reduction furnace. Background technique [0002] At present, smelting reduction ironmaking technology is one of several cutting-edge high-techs in the iron and steel industry. It is a new process for producing molten iron from coal and ore. Because this technology makes ironmaking get rid of the dependence on metallurgical coke and provides the possibility of direct use of fine ore, it has the advantages of environmental friendliness, low energy consumption, low investment, strong adaptability, etc., so it has attracted the attention of the iron and steel fields of all countries in the world . However, due to the particularity of the furnace operation process involved in this technology, the erosion and erosion of the taphole area of ​​the hearth of this type of smelting reduction furnace is serious, the outflow of molten iron is large, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21B13/00
Inventor 甘菲芳夏欣鹏周海忠
Owner BAOSHAN IRON & STEEL CO LTD
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