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Taphole stemming used for oversize blast furnaces

A tap hole and extra-large technology, applied in the field of refractory materials, can solve the problems of reduced density, strength, and performance of the taphole mud, and achieves improved slag scouring and erosion performance, improved thermal shock resistance, and improved thermal shock resistance. The effect of long tapping time

Inactive Publication Date: 2012-04-04
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of anthracene oil will lead to a decrease in the compactness and strength of the gun mud, which will reduce the performance of the gun mud.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1: Dosing according to the following requirements:

[0048] 4-0mm brown corundum raw material, the addition amount accounts for 50% of the total weight of ingredients;

[0049] 3-0mm silicon carbide raw material, the added amount accounts for 5% of the total weight percentage of the ingredients;

[0050] 2-0mm composite carbon material, the added amount accounts for 15% of the total ingredients by weight; the composite carbon material is composed of: coke powder 70%, graphite 15%, D 50 = 40nm carbon black 15%.

[0051] 0.088 ~ 0mm ferrosilicon nitride raw materials added accounted for 11% of the total weight percentage of ingredients;

[0052] 0.088 ~ 0mm kaolin raw materials added accounted for 15% of the total weight percentage of ingredients;

[0053] The amount of composite refractory powder less than 10 microns accounts for 3% of the total weight percentage of the ingredients;

[0054] The addition amount of 0.088~0mm metal aluminum powder accounts for...

Embodiment 2

[0058] Dosing according to the following requirements:

[0059] 4-0mm brown corundum raw material, the added amount accounts for 35% of the total weight of ingredients;

[0060] 3-0mm silicon carbide raw material, the added amount accounts for 20% of the weight percentage of the total ingredients;

[0061] 2-0mm composite carbon material, the added amount accounts for 20% of the weight percentage of the total ingredients; the composite carbon material is composed of: coke powder 90%, D 50 = 40nm carbon black 10%.

[0062] The amount of 0.088-0mm ferrosilicon nitride raw material accounts for 7% of the total weight percentage of the ingredients;

[0063] 0.088 ~ 0mm kaolin raw materials added accounted for 10% of the total weight percentage of ingredients;

[0064] The amount of composite refractory powder less than 10 microns accounts for 5% of the total weight percentage of the ingredients;

[0065] The added amount of 0.088-0mm metal silicon powder accounts for 3% of the...

Embodiment 3

[0069] Dosing according to the following requirements:

[0070] 4-0mm brown corundum raw material, the added amount accounts for 25% of the total weight of ingredients;

[0071] 3-0mm silicon carbide raw material, the addition amount accounts for 8% of the weight percentage of the total ingredients;

[0072] 2-0mm composite carbon material, the added amount accounts for 30% of the total weight percentage of the ingredients; the composite carbon material is composed of: coke powder 75%, graphite 25%.

[0073] The amount of 0.088-0mm ferrosilicon nitride raw material accounts for 20% of the total weight percentage of the ingredients;

[0074] 0.088 ~ 0mm of kaolin raw materials added accounted for 5% of the total weight percentage of ingredients;

[0075] The amount of composite refractory powders less than 10 microns accounts for 7% of the total weight percentage of the ingredients;

[0076] The added amount of 0.088-0mm composite metal powder accounts for 5% of the total we...

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Abstract

Belonging to the technical field of refractory materials, the invention relates to taphole stemming used for oversize blast furnaces over 4500m<3>. The taphole stemming used for oversize blast furnaces comprises by weight: 25-50% of brown corundum, 5-20% of silicon carbide, 7-25% of ferro-silicon nitride, 15-30% of a composite carbon material, 5-15% of kaolin, 3-7% of composite refractory material micropowder, and 1-5% of composite metal powder. The stemming is prepared by the steps of: conducting weighing and burdening according to the above ratio of various raw materials, mixing them well and adding a coal tar binder accounting for 15-25% of the total weight of the additionally added dry materials, then conducting rolling and mulling so as to obtain a mud material. The stemming of the invention has good comprehensive performance, stable taphole depth, long tapping time, good erosion and scouring resistance, as well as good construction performance.

Description

technical field [0001] The present invention relates to a 4500m 3 The above-mentioned tap hole clay for super-large blast furnace belongs to the technical field of refractory materials. Background technique [0002] With the increase in size and longevity of blast furnaces, gun clay has shifted from a purely consumable refractory material to a functional refractory material. In addition to the functions of blocking the tap hole and stabilizing the tap, it also has the function of protecting the hearth area, so blast clay is a very important refractory material in the ironmaking process. The larger the volume of the blast furnace and the higher the smelting intensity, the higher the requirements for the blast furnace clay. [0003] Currently 5000m 3 There are more and more ultra-large blast furnaces of the 1st grade in China, with high internal pressure and high smelting intensity, and the daily iron output is as high as 12,500 tons. Therefore, the applied gun mud must h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 夏欣鹏甘菲芳姜伟忠林成城宋文刚
Owner BAOSHAN IRON & STEEL CO LTD
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