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Waterless stemming for blast furnace

An anhydrous taphole and blast furnace technology, applied in blast furnaces, blast furnace details, blast furnace parts, etc., can solve problems such as unreasonable ingredients and particle size, aggravate the erosion of the iron hole area of ​​the hearth, and affect the service life of the blast furnace, etc. Superior bonding performance, improving blast furnace production safety, and excellent wear resistance

Inactive Publication Date: 2004-08-25
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor raw materials used, unreasonable ingredients and particle size, the rolled clay has the following disadvantages: iron hole tide, slag and iron splashing in the whole process of tapping; poor clay strength, mud bag is difficult to maintain, iron hole If the depth is small, the furnace door is shallow or the mud bag breaks during the tapping process, causing "running big flow", blasting the slag ditch under the molten iron, and overflowing the molten iron tank, etc.
In addition, since the iron mouth area and the hearth of the blast furnace are mostly built with carbonaceous materials, the water in the water gun mud will chemically react with the carbon bricks under high temperature conditions, thereby intensifying the erosion of the iron mouth area of ​​the hearth and affecting the use of the blast furnace Life, can not meet the higher smelting intensity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Weigh the raw materials according to the following ratio:

[0028] Coarse brown corundum with a particle size of 1-3mm 1 kg

[0029] Fine brown corundum with a particle size of 0-1mm 5 kg

[0030] Coarse corundum with a particle size of 1-3mm 14 kg

[0031] Particle size 0-0.5mm fine corundum 9 kg

[0032] Coke powder with a particle size of 0-1mm 15 kg

[0033] Clay with a particle size of 0-0.9mm 17 kg

[0034] Silicon carbide with a particle size of 0-1mm 7 kg

[0035] Sericite with a particle size of 0-0.08mm 8 kg

[0036] Bitumen 2 kg

[0037] Anthracene oil 23 kg

[0038] 2. Put the raw materials in the following order:

[0039] Coke powder→rough corundum→fine corundum→rough corundum→fine corundum→silicon carbide→clay→pitch→anthracene oil;

[0040] 3. Mix and grind in a hot state for 30-50 minutes at a temperature of 40-60°C to obtain 100 kg of anhydrous gunpowder, put it in a plastic bag and store it for more than 24 hours before use.

Embodiment 2

[0042] 1. Weigh the raw materials according to the following ratio:

[0043] Coarse brown corundum with a particle size of 1-3mm 4 kg

[0044] Fine brown corundum with a particle size of 0-1mm 2 kg

[0045] Coarse corundum with a particle size of 1-3mm 7 kg

[0046] 0-0.5mm particle size fine corundum 20 kg

[0047] Coke powder with a particle size of 0-1mm 20 kg

[0048] 12 kg of clay with a particle size of 0-0.9 mm

[0049] Silicon carbide with a particle size of 0-1mm 11 kg

[0050] Sericite with a particle size of 0-0.08mm 5 kg

[0051] Bitumen 4 kg

[0052] Anthracene oil 15 kg

[0053] 2. Put the raw materials in the following order:

[0054] Coke powder→rough corundum→fine corundum→rough corundum→fine corundum→silicon carbide→clay→pitch→anthracene oil;

[0055] 3. Mix and grind in a hot state for 30-50 minutes at a temperature of 40-60°C to obtain 100 kg of anhydrous gunpowder, put it in a plastic bag and store it for more than 24 hours before use.

Embodiment 3

[0057] 1. Weigh the raw materials according to the following ratio:

[0058] Coarse brown corundum with a particle size of 1-3mm 2 kg

[0059] 3 kg of fine brown corundum with a particle size of 0-1mm

[0060] Coarse corundum with a particle size of 1-3mm 10 kg

[0061] 0-0.5mm particle size fine corundum 15 kg

[0062] Coke powder with a particle size of 0-1mm 18 kg

[0063] 15 kg of clay with a particle size of 0-0.9mm

[0064] Silicon carbide with a particle size of 0-1mm 9 kg

[0065] Sericite with a particle size of 0-0.08mm 6 kg

[0066] Bitumen 3 kg

[0067] Anthracene oil 19 kg

[0068] 2. Put the raw materials in the following order:

[0069] Coke powder→rough corundum→fine corundum→rough corundum→fine corundum→silicon carbide→clay→pitch→anthracene oil;

[0070] 3. Mix and grind in a hot state for 30-50 minutes at a temperature of 40-60°C to obtain 100 kg of anhydrous gunpowder, put it in a plastic bag and store it for more than 24 hours before use.

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Abstract

The present invention provides an anhydrous stemming for blast furnace. Its composition includes (wt%) coarse brown corundun 1-4%, fine brown corundum 2-5%, coarse mullite 7-15%, fine mullite 9-20%, coke powder 15-20%, clay 10-19%, silicon carbide 7-11%, sericite 5-8%, bitumen 2-4% and anthracene oil 15-25%. It has good working property, stable high temperature resistance, excellent caking property, quick agglutinating property, low ton-iron stemming consumption, low contraction rate and high strength, it can raise tap up-to-standard rate to 100% from original 61.5%, can raise production safety of blast furnace, and can raise smelting strength.

Description

technical field [0001] The invention relates to a blast furnace clay, in particular to a blast furnace clay used for blocking a blast furnace taphole in the ironmaking process, and belongs to the technical field of metallurgy. Background technique [0002] At present, the taphole clay used to block the iron hole of the blast furnace is mainly water taphole clay, which is made by mixing and grinding carbon materials, refractory aggregates and raw clay. Due to the poor raw materials used, unreasonable ingredients and particle size, the rolled clay has the following disadvantages: iron mouth tide, slag and iron splashing in the whole process of tapping; poor clay strength, mud bag is difficult to maintain, iron mouth If the depth is small, the furnace door is shallow or the mud bag breaks during the tapping process, causing "running big flow", blasting the slag ditch under the molten iron, and overflowing the molten iron tank. In addition, since the iron mouth area and the hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21B7/12
Inventor 李明杨光景陈昆生苏立江罗茂华杨学元
Owner WUKUN STEEL
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