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Anhydrous stemming for blast furnace

A technology of anhydrous blast furnace mud and blast furnace, which is applied in the field of blast furnace mud, which can solve the problems of low resistance to slag and iron erosion and erosion, easy iron leakage, and short tapping time, so as to prolong the time of putting iron and reduce the Leakage and re-opening rate, the effect of reducing the moisture of the iron hole

Inactive Publication Date: 2013-04-17
CHONGQING SHENGZHU SCI&TECH DEVCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the anhydrous taphole mud in the prior art has defects such as short tapping time, low ability to resist slag and iron erosion and erosion, easy iron leakage, and high average material consumption per furnace.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of anhydrous blast furnace clay, made of the following raw materials in weight percentage: 16% bauxite, 22% coke, 16% clay, 18% composite powder, 6% modified pitch, 4% kyanite and 18% composite bond agent. The composite binder is composed of tar and anthracene oil, and the weight ratio of tar and anthracene oil is 3:7; the composite powder is composed of the following raw materials by weight percentage: 34% brown corundum, 14% sericite, 22% silicon carbide and 30% nitriding silicon.

[0021] The particle size of bauxite is 0.02-2.2mm, the particle size of coke is 0.15-2.5mm, the particle size of clay is 0.012-0.044mm, the particle size of kyanite is 10-80mm, and the particle size of composite powder is 0.02 ~0.4mm.

[0022] When making the blast furnace anhydrous clay, first put coke into the mud mill and grind it into a powder with a particle size of 0.15-2.5mm, and then press alumina → clay → kyanite → composite powder → modified asphalt → composite combinati...

Embodiment 2

[0025] A kind of anhydrous blast furnace clay, made of the following raw materials in weight percentage: 20% bauxite, 20% coke, 15% clay, 20% composite powder, 6.5% modified pitch, 5% kyanite and 13.5% composite bond agent. The composite binder is composed of tar and anthracene oil, and the weight ratio of tar and anthracene oil is 3:7; the composite powder is composed of the following raw materials by weight percentage: 36% brown corundum, 16% sericite, 20% silicon carbide and 28% nitriding silicon.

[0026] The particle size of bauxite is 0.02-2.2mm, the particle size of coke is 0.15-2.5mm, the particle size of clay is 0.012-0.044mm, the particle size of kyanite is 10-80mm, and the particle size of composite powder is 0.02 ~0.4mm.

[0027] When making the blast furnace anhydrous clay, first put coke into the mud mill and grind it into a powder with a particle size of 0.15-2.5mm, and then press bauxite → clay → kyanite → composite powder → modified asphalt → composite combi...

Embodiment 3

[0030] A kind of anhydrous blast furnace clay, made of the following raw materials by weight percentage: 22% bauxite, 18% coke, 14% clay, 22% composite powder, 7% modified pitch, 6% kyanite and 11% composite bond agent. Among them: the composite binder is composed of tar and anthracene oil, and the weight ratio of tar and anthracene oil is 3:7; the composite powder is composed of the following raw materials by weight percentage: 38% brown corundum, 18% sericite, 18% silicon carbide and 26% silicon nitride.

[0031] The particle size of bauxite is 0.02-2.2mm, the particle size of coke is 0.15-2.5mm, the particle size of clay is 0.012-0.044mm, the particle size of kyanite is 10-80mm, and the particle size of composite powder is 0.02 ~0.4mm.

[0032] When making the blast furnace anhydrous clay, first put coke into the mud mill and grind it into a powder with a particle size of 0.15-2.5mm, and then press bauxite → clay → kyanite → composite powder → modified asphalt → composite...

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Abstract

The invention discloses anhydrous stemming for a blast furnace. The anhydrous stemming is made of the following raw materials in percentage by weight: 16-22 percent of alumina, 18-22 percent of coke, 14-16 percent of clay, 18-22 percent of composite powder, 6-7 percent of modified pitch, 4-6 percent of kyanite and 11-18 percent of composite binder. The composite binder consists of tar and anthracene oil, wherein the weight ratio of tar to anthracene oil is 3:7. The composite powder consists of the following raw materials in percentage by weight: 34-38 percent of brown aluminum oxide, 14-18 percent of sericite, 18-22 percent of silicon carbide and 26-30 percent of silicon nitride. The anhydrous stemming for the blast furnace has the advantages that the qualification rate of iron notch depth is improved, the opening leakage and reopening rate and the dill immobility rate are reduced, the molten iron drainage time is prolonged, the anti-scouring and anti-erosion capacity is stronger, theprobability of iron notch opening leakage and the moisture of the iron notch are greatly reduced and the material consumption during iron notch opening at the front of the furnace is lower.

Description

technical field [0001] The invention relates to a blast furnace clay, in particular to an anhydrous blast furnace clay. Background technique [0002] Due to the large-scale and long life of modern blast furnaces, the increase of tapping time and the increase of slag and iron flow, higher requirements are put forward for the stability and maintenance of the blast furnace taphole. In order to maintain the straight line and high production of the blast furnace, the key to ensure stable operation is the depth of the tap hole, and the performance of the blasting mud is the key to ensure the stable operation of the tap hole. [0003] The quality of gun mud has a great influence on the strength of the mud bag, especially in recent years, after the blast furnace has been intensively smelted, the number of iron tappings per day is 18 to 22 times, and some even increased to 28 times. Therefore, it is required to have sufficient refractoriness, suitable porosity, and strong resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 郑权
Owner CHONGQING SHENGZHU SCI&TECH DEVCO
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