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Skimming tool

A skimmer and micropowder technology, which is applied to blast furnace parts, blast furnaces, furnace types, etc., can solve the problems of lower labor productivity, poor operating environment, and influence on punctual tapping, so as to improve labor productivity, reduce the cost per ton of iron, The effect of prolonging the service life

Inactive Publication Date: 2007-04-11
CHANGXING MINGTIAN FURNACE CHARGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Short service life, frequent repairs, high labor intensity, and harsh operating environment; due to the serious phenomenon of slag and iron sticking to the trench wall, it is difficult to manufacture and takes too much time. reduced labor productivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Dense corundum or brown corundum: 45%, silicon carbide: 31%, spherical pitch: 2.5%, pure calcium aluminate cement: 3%, α-Al 2 o 3 Micropowder: 9%, uf-SiO 2 Micropowder: 2%, metal aluminum powder: 1%, metal silicon powder: 2%, composite additive: 0.5%, water: 4%. After the material is prepared according to the above ratio, it is directly poured into the mold, and then fired to form a prefabricated skimmer that can be used directly, and the user does not need to ram before the furnace when using it. And in the case of achieving a better effect than the original, its thickness is much smaller than the original, saving raw material resources.

[0012] The volume of the blast furnace generally has various specifications such as 150m3, 300m3, 450m3, 700m3, etc. The volume of the skimmer should correspond to the volume of the blast furnace. increased, but the weight percentages of the various components remained the same.

[0013] Among them, dense corundum or brown corund...

Embodiment 2

[0020] Dense corundum or brown corundum: 43%, silicon carbide: 33%, spherical pitch: 3%, pure calcium aluminate cement: 2.7%, α-Al 2 o 3 Micropowder: 9.8%, uf-SiO 2 Micropowder: 2%, metal aluminum powder: 0.5%, metal silicon powder: 1%, compound additive: 0.3%, water: 4.7%. After the material is prepared according to the above ratio, it is directly poured into the mold, and then fired to form a prefabricated skimmer that can be used directly. The user does not need to ram before the furnace when using it. And in the case of achieving a better effect than the original, its thickness is much smaller than the original, saving raw material resources.

Embodiment 3

[0022] Dense corundum or brown corundum: 48%, silicon carbide: 29%, spherical pitch: 2%, pure calcium aluminate cement: 2.5%, α-Al 2 o 3 Micropowder: 8%, uf-SiO 2 Micropowder: 2.5%, metal aluminum powder: 1.5%, metal silicon powder: 2.6%, composite additive: 0.4%, water: 3.5%. After the material is prepared according to the above ratio, it is directly poured into the mold, and then fired to form a prefabricated skimmer that can be used directly. The user does not need to ram before the furnace when using it. And in the case of achieving a better effect than the original, its thickness is much smaller than the original, saving raw material resources.

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PUM

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Abstract

The skimming tool is made with dense corundum or brown corundum 43-48 wt%, silicon carbide 29-33 wt%, pelleted pitch 2-3 wt%, calcium aluminate cement 2.5-3 wt%, fine alpha-Al2O3 powder 8-10 wt%, fine uf-SiO2 powder 2-2.5 wt%, metal aluminum powder 0.5-1.5 wt%, metal silicon powder 1-3 wt%, composite additive 0.3-0.5 wt%, and water 3.5-5.5 wt%. The skimming tool of the present invention has excellent washing, oxidizing and slag erosion resisting performance and long service life.

Description

【Technical field】 [0001] The invention relates to the field of ironmaking auxiliary equipment, in particular to a slag-iron separation device for blast furnace tapping. 【Background technique】 [0002] With the rapid growth of my country's steel production, the improvement of the quality of various materials before the furnace has become the focus of attention of the refractory industry. The skimmer is the main device of the slag and iron treatment system in front of the blast furnace steelmaking furnace. The replacement time of the skimmer directly affects the normal production order of the blast furnace, and then affects the economic benefits of the steel plant. Existing skimmers are all formed by pounding bulk materials on-site with steel molds, and different steel mills are quite arbitrary about the types of bulk materials used and the weight ratio of various bulk materials to make skimmers , the anti-scouring, anti-oxidation and anti-slag erosion performance of the prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/10C21B7/00B22D43/00C21C7/00
Inventor 佘成明佘亚锋
Owner CHANGXING MINGTIAN FURNACE CHARGE
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