A kind of waterless gunpowder and preparation method thereof

A technology of anhydrous taphole mud and corundum, which is applied in the field of metallurgy, can solve problems such as poor corrosion resistance and unstable quality of anhydrous taphole mud, and achieve improved anti-oxidation performance, good volume stability, and improved hole opening performance. Effect

Active Publication Date: 2016-01-06
CHONGQING IRON & STEEL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention aims at the technical problems of unstable quality and poor corrosion resistance of the existing anhydrous taphole clay products, and provides a high strength, good plasticity, stable volume and good corrosion resistance. anhydrous gunpowder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 200kg of high alumina aggregate, 230kg of corundum, 200kg of silicon carbide, 30kg of boron nitride, 60kg of pitch and 80kg of coke as the main raw materials; the Al 2 o 3 The mass content of Al in corundum is 80%. 2 o 3 The mass content is 95%; 50kg of soft clay and 140kg of tar are weighed as additives, wherein the soft clay plays a binding role; the main raw materials and additives are mixed together and stirred evenly to prepare mixed raw materials. Put the prepared mixed raw materials into the mud mill, and grind at 45°C for 40 minutes; discharge the mud after milling, transfer it to the molding machine, and squeeze out the mud from the squeeze port with a temperature of 55°C The extruded mud is divided according to 5kg per piece, and the mud is thrown 10 times to obtain an anhydrous gunpowder in a square shape, compact structure, and no looseness and cracks on the surface.

Embodiment 2

[0026] Weigh 230kg of high alumina aggregate, 240kg of corundum, 230kg of silicon carbide, 40kg of boron nitride, 70kg of pitch and 90kg of coke as the main raw materials; the Al 2 o 3 The mass content of Al in corundum is 85%. 2 o 3 The mass content is 96%; 60kg of soft clay and 145kg of tar are weighed as additives, wherein the soft clay plays a binding role; the main raw materials and additives are mixed together and stirred evenly to prepare mixed raw materials. Put the prepared mixed raw materials into the mud mill, and grind at 50°C for 45 minutes; discharge the mud after milling, transfer it to the molding machine, and squeeze out the mud from the squeeze port with a temperature of 60°C ; To the extruded mud, divide the block according to each 6kg, and throw the mud 15 times to the block to obtain anhydrous taphole mud in a square shape, compact structure, and no looseness and cracks on the surface.

Embodiment 3

[0028] Weigh 240kg of high alumina aggregate, 240kg of corundum, 250kg of silicon carbide, 50kg of boron nitride, 80kg of pitch and 100kg of coke as the main raw materials; the Al 2 o 3 The mass content of Al in corundum is 90%. 2 o 3 The mass content is 98%; 80kg of soft clay and 150kg of tar are weighed as additives, wherein the soft clay plays a binding role; the main raw materials and additives are mixed together, stirred evenly, and mixed into raw materials. Put the prepared mixed raw materials into the mud mill, and grind at 55°C for 50 minutes; discharge the mud after milling, transfer it to the molding machine, and squeeze out the mud from the squeeze port with a temperature of 65°C ; To the extruded mud material, divide the material block according to each 7kg, and throw mud 20 times to the material block to obtain anhydrous gunpowder in a square shape, compact structure, and no looseness and cracks on the surface.

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Abstract

The invention provides an anhydrous taphole clay, which uses high-alumina aggregate, corundum, silicon carbide, boron nitride, pitch and coke as main raw materials, through the synergistic combination of additives soft clay and tar, through batching, mud grinding and It is prepared after forming; the parts by weight of the main raw materials and additives are: high alumina aggregate 20~24, corundum 23~24, silicon carbide 20~25, boron nitride 3~5, pitch 6~8, coke 8 ~10 parts, soft clay 5~8, tar 14~15; The present invention also provides a kind of preparation method of anhydrous gunpowder, at first raw material is stirred evenly to obtain mixed raw material; Milled at 55°C for 40~50? min; then transfer the milled mud to the molding machine, extrude the mud from the squeeze port at 55~65°C, divide the block according to 5~7kg per piece, and carry out no less than 10 times of throwing mud process, make. The anhydrous taphole clay prepared by the invention has high strength, good volume stability, strong slag resistance and erosion resistance, and good opening performance.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an anhydrous taphole clay and a preparation method thereof. Background technique [0002] With the continuous strengthening of blast furnace smelting, the requirements for the work of the blast furnace taphole are getting higher and higher. In order to stabilize the working state of the taphole and meet the needs of blast furnace intensified smelting, it is necessary to use a mud gun to press the blast furnace mud into the iron tunnel to seal it. Taphole, protect the furnace wall and furnace bottom in the taphole area. This requires that the gun mud has good working performance and can fully fill the iron hole; good volume stability and fast sintering; it has fast drying hardening and high high temperature strength; good opening performance and easy opening; and has resistance to slag and iron erosion. , scouring, good anti-oxidation properties. [0003] There ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 李兴杜春天江琴谭春凡
Owner CHONGQING IRON & STEEL (GRP) CO LTD
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