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Blast furnace taphole clay and manufacturing technology method thereof

A technology for taphole clay and blast furnace, which is applied in the field of blast furnace taphole maintenance taphole clay and its preparation, and achieves the effects of maintaining the service life of the blast furnace, improving the durability and having good corrosion resistance.

Inactive Publication Date: 2009-12-16
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently reported production methods for gun mud are traditional rolling, heating, and mud extrusion processes.

Method used

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  • Blast furnace taphole clay and manufacturing technology method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Components, parts by weight and preparation method of blast furnace clay:

[0024] Weigh 85 parts of the refractory matrix composed of 43 parts of corundum, 10 parts of silicon carbide, 3 parts of clay, 17 parts of coke powder, 6 parts of ferrosilicon nitride and 6 parts of sericite by weight of each component, and mix evenly; the refractory matrix made of the above materials is heated to 30°C by the preheating device; 7 parts of asphalt with a particle size of less than 0.074mm is heated to 45°C by the preheating device; 0.1% of phenolic resin and 99.9% of tar 20 parts of the composite binder, the heating device is heated to 35 ℃; the composite binder fixes the carbon content of 30%; the heated refractory base material and the carbon-containing material are stirred and mixed for 15 minutes; the composite binder is added for rolling , the rolling time is 60 minutes; put the rolled material into the extruder and form it into mud sticks for packaging.

Embodiment 2

[0026] Weigh 70 parts of the refractory matrix consisting of 35 parts of corundum, 10 parts of silicon carbide, 5 parts of clay, 12 parts of coke powder, 3 parts of ferrosilicon nitride and 5 parts of sericite, and mix them uniformly; The device heats the refractory matrix made of the above materials to 100°C; the preheating device heats 5 parts of regenerated carbon powder with a particle size of less than 0.045mm to 80°C; The heating device is heated to 90°C; the composite binder fixes the carbon content to 50%; the heated refractory base material and the carbon-containing material are stirred and mixed for 15 minutes; the composite binder is added for rolling, and the rolling time is 20 minutes; put the crushed material into the extruder to form mud sticks and pack them for later use.

Embodiment 3

[0028] Weigh 92 parts of the refractory matrix composed of 60 parts of corundum, 5 parts of silicon carbide, 10 parts of clay, 8 parts of coke powder, 7 parts of ferrosilicon nitride and 2 parts of sericite by weight of each component, and mix evenly; the refractory matrix formed by mixing the above materials is heated to 70°C by the preheating device; 15 parts of asphalt with a particle size less than 0.088mm is heated to 20°C by the preheating device; 3% of phenolic resin and 97% of tar The composite binder is 15 parts, and the heating device is heated to 50°C; the composite binder fixes the carbon content of 30%; the heated refractory base material and the carbon-containing material are stirred and mixed for 10 minutes; the composite binder is added for rolling , the rolling time is 30 minutes; put the rolled material into the extruder and form it into mud sticks for packaging.

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Abstract

The invention relates to taphole clay for maintaining the a blast furnace iron notch and a preparation method thereof, aiming at solving the defects of heavy population or high cost caused by the full application of tar, carbolineum or phenolic resin, difficult low temperature tapping, complex process, and the like of the prior art. The measure is as follows: the blast furnace taphole clay, which is characterized by including the components according to parts by weight: 70 to 97 parts of refractory material matrix, 5 to 15 parts of carbon-containing material and 15 to 30 parts of composite binder, wherein the carbon-containing material is asphalt or regenerative carbon powder; and the composite binder is the mixture of phenolic resin and tar. The technology comprises the following steps: the components formed the refractory material matrix are uniformly mixed and are heated to the temperature ranging from 30 to 100 DEG C; the carbon-containing material is heated to 20 to 80 DEG C; the composite binder is heated to 35 to 90 DEG C; the heated refractory material matrix is stirred with the carbon-containing material for 5 to 15min; the heated composite binder is added into the mixture obtained in the last step, and the action of rolling compaction is executed for 20 to 60min; and the rolled and compacted materials are added into an extruder to be shaped and packed for standby use. The invention has the advantages of low pollution, favorable strength of the taphole clay, high application property, favorable associativity of old and new taphole clay and simple process.

Description

technical field [0001] The invention belongs to an auxiliary refractory material for ironmaking and a manufacturing method thereof, in particular to gun mud used for blast furnace iron hole maintenance and a preparation method thereof. Background technique [0002] At present, most of the blast furnace clay is still a combination of tar and anthracene oil, because tar and anthracene oil can endow the clay with good plasticity and easy to mud; and the clay is pressed into the iron mouth channel, close to the hearth of the blast furnace The part of the gun mud should be easy to sinter to protect the iron hole. The strength of the inlet part of the iron hole channel should not be too high, otherwise the opening machine will not be easy to open holes; but tar and anthracene oil will cause serious pollution. In order to meet the needs of environmental protection, phenolic resin combined gun clay has been tested at home and abroad; phenolic resin combined gun clay hardens quickly ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C21B7/12
Inventor 熊亚非徐国涛李怀远李淑忠邓棠赵志国赵思张洪雷
Owner WUHAN IRON & STEEL (GROUP) CORP
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