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Blast-furnace stemming for tapping hole

A tap hole and taphole clay technology is applied in the field of blast furnace taphole mud and preparation for tap hole, which can solve the problems of difficulty in production planning, affecting the stable tapping of the tap hole, and inability to handle the tap hole in time, so as to improve the molten iron in the tap hole. Unstable, cost-saving effects

Inactive Publication Date: 2016-01-20
张婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when smelting some special iron ores, such as iron ores with high vanadium and titanium content, because the melting point of vanadium and titanium oxides is very high, which is higher than the iron tapping temperature, the iron cannot be melted during tapping, and will be deposited on the tap. The tap hole will lead to thicker and thicker knots, which will cause the hole diameter of the tap hole to change; under high temperature, the tap hole cannot be dealt with in time. stable, it is very easy to cause molten iron to run in a large flow and spray rockets, which brings difficulties to arrange the production plan of blast furnace for normal tapping

Method used

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  • Blast-furnace stemming for tapping hole

Examples

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Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: a kind of clay for 1080m3 blast furnace is characterized in that said blast furnace clay is composed of the following components by weight: 3-1mm magnesia chromium spinel: 20 parts; 1-0mm corundum: 8 parts; 1-0mm sillimanite: 15 parts; 0.5-0mm magnesia iron oxide: 15 parts; partial clay powder: 9 parts; cobalt aluminum oxide powder: 3 parts, cutting powder: 5 parts; graphite powder: 14 parts, composite carbon powder 9 parts 1 part, 1 part of cobalt tetraoxide powder, 1 part of medium temperature asphalt powder; the preparation method of gun mud: put the above-mentioned raw materials into the mixer and mill, and pre-mix for 15 minutes; prepare 13 parts of modified tar, first add the total amount of modified tar 85%, wet milling for 35 minutes; add the remaining 15% modified tar, and then wet milling for 15 minutes; slice through a gun mud slicer, and then be formed by extrusion, cut into segments and cool to room temperature. The temperature of the mud is s...

Embodiment 2

[0012] Embodiment 2: a kind of clay for 2500m3 blast furnace, characterized in that said blast furnace clay is composed of the following components by weight: 3-1mm magnesia chromium spinel: 19 parts; 1-0mm corundum: 7 parts; 1-0mm sillimanite: 14 parts; 0.5-0mm magnesia iron oxide: 15 parts; partial clay powder: 10 parts; cobalt aluminum oxide powder: 5 parts, cutting powder: 5 parts; graphite powder: 18 parts, composite carbon powder 6 parts Parts, medium temperature asphalt powder: 1 part. The preparation method of gun mud: Put all the raw materials into the mixer and pre-mix for 15 minutes; prepare 14 parts of modified tar, first add 85% of the total amount of modified tar, wet mill for 35 minutes; add the remaining 15% Modified tar, then wet milled for 15 minutes; sliced ​​by a mud slicer, and then passed through a mud extruder, extruded to form, cut into sections and cooled to room temperature, and the extruded temperature in this step was set at 55°C; the second The fi...

Embodiment 3

[0013] Embodiment 3: a kind of clay for 3000m3 blast furnace, characterized in that said blast furnace clay is composed of the following components by weight: 3-1mm magnesia chromium spinel: 20 parts; 1-0mm corundum: 6 parts; 1-0mm sillimanite: 14 parts; 0.5-0mm magnesia iron oxide: 13 parts; partial clay powder: 10 parts; cobalt aluminum oxide powder: 5 parts, cutting powder: 5 parts; graphite powder: 20 parts, composite carbon powder 6 parts Parts, medium temperature asphalt powder: 1 part. The preparation method of gun mud: put all the raw materials into the mixer and pre-mix for 15 minutes; prepare 15 parts of modified tar, first add 85% of the total amount of modified tar, and wet mill for 35 minutes; add the remaining 15% to modify tar, and then wet milled for 15 minutes; sliced ​​by a gun mud slicer, and then passed through a mud extruder, extruded into shape, cut into sections and cooled to room temperature, and the extruded temperature in this step was set at 55°C; th...

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Abstract

The invention discloses blast-furnace stemming for a tapping hole. The blast-furnace stemming is characterized by being prepared from the following ingredients in parts by weight: 15 to 20 parts of 3-1mm magnesia-chrome spinel, 5 to 8 parts of 1-0mm corundum, 10 to 15 parts of 1-0mm sillimanite, 8 to 15 parts of 0.5-0mm magnesium oxide iron, 8 to 13 parts of clay powder, 3 to 7 parts of cobalt oxide aluminum powder, 5 to 10 parts of cutting powder, 7 to 25 parts of graphite powder, 5 to 10 parts of compound carbon powder, 0 to 1 part of cobaltosic oxide powder and 1 to 2 parts of medium temperature asphalt. The stemming has the advantages that the hole diameter of the tapping hole can be protected to be stable and to be not easily changed; the tapping is stable; in addition, in the long-time storage process of the stemming, the use performance and the operation performance are not lowered.

Description

technical field [0001] The invention belongs to the field of refractory plastics for blast furnace ironmaking, and in particular relates to a blast furnace clay for a taphole and a preparation method thereof. Background technique [0002] The blast furnace is the main equipment for smelting molten iron. After the blast furnace smelts iron, the molten iron needs to be released through the blast furnace taphole. In order to ensure continuous smelting, the taphole must be blocked. The material that blocks the taphole is called gun mud. . At present, when smelting some special iron ores, such as iron ores with high vanadium and titanium content, because the melting point of vanadium and titanium oxides is very high, which is higher than the tapping temperature, the iron cannot be melted during tapping, and will be deposited on the tapping surface. The tap hole, resulting in thicker knots, resulting in changes in the hole diameter of the tap hole; generally, the tap hole cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 张婷
Owner 张婷
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