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Novel slide plate brick for automatic slag-retaining slide gate of converter and preparation method of slide plate brick

A sliding nozzle and automatic blocking technology, which is applied in the field of sliding bricks for the new type converter automatic slag blocking sliding nozzle and its preparation, can solve the problems of poor grasp of slag blocking timing, inability to prevent converter slag dropping, frequent parts replacement, etc., and achieve convenient The control of production cycle and tapping temperature, excellent thermal shock stability, and the effect of improving the life of the ladle

Active Publication Date: 2014-06-18
无锡市南方耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when steel slag is mixed out due to inhalation vortex during tapping, it is difficult to grasp the timing of slag blocking, and the working environment is harsh, and parts are replaced frequently; the working principle of infrared slag detection is to use different infrared wavelengths emitted by different materials at different temperatures. To distinguish molten steel and slag, infrared slag detection has obvious advantages in rapidity, reliability and cost when used, but it cannot prevent converter slag

Method used

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  • Novel slide plate brick for automatic slag-retaining slide gate of converter and preparation method of slide plate brick

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Effect test

Embodiment 1

[0037] A new method for preparing sliding bricks for automatic slag-retaining sliding nozzles of converters. The selected weight percentages are: 30% of tabular corundum with a particle diameter of 2-1mm, 33% of tabular corundum with a particle diameter of 1-0mm, and granules 6% of 98 magnesia with a diameter of 1-0mm, 8% of 325-mesh fused spinel, 4% of 180-mesh graphite, 4% of 1μm a-alumina powder, 1% of sintering agent, 5% of aluminum-silicon alloy powder and 4% resin, according to the mixing amount of 500 kg per machine, first turn on the automatic pressure-adjusting lifting type kneading machine, then put in the granular plate-shaped corundum and 98 magnesia, add the resin after 3 minutes, and after 8-10 minutes After mixing, put in fine powder materials such as fused spinel, graphite, a-alumina micropowder, sintering agent and aluminum-silicon alloy powder, stir for 8-10 minutes and then pressurize for 25 minutes. After the pressurization is completed, lift the roller out ...

Embodiment 2

[0039] A new method for preparing sliding bricks for automatic slag-retaining sliding nozzles of converters. The selected weight percentages are: 32% of tabular corundum with a particle diameter of 2-1mm, 28% of tabular corundum with a particle diameter of 1-0mm, and granules 7% of 98 magnesia with a diameter of 1-0mm, 10% of 325-mesh fused spinel, 5% of 180-mesh graphite, 6% of 1μm a-alumina powder, 2% of sintering agent, 6% of aluminum-silicon alloy powder and 5% resin, according to the mixing amount of 500 kg per machine, first turn on the automatic pressure-adjusting lifting type mixing machine, then put in the granular plate-shaped corundum and 98 magnesia, add the resin after 4 minutes, and after 8-10 minutes After mixing, put in fine powder materials such as fused spinel, graphite, a-alumina micropowder, sintering agent and aluminum-silicon alloy powder, stir for 8-10 minutes and then pressurize for 20 minutes. After the pressurization is completed, lift the roller out ...

Embodiment 3

[0041] A new method for preparing sliding bricks for automatic slag-retaining sliding nozzles of converters. The selected weight percentages are: 35% of tabular corundum with a particle diameter of 2-1mm, 30% of tabular corundum with a particle diameter of 1-0mm, and granules 8% of 98 magnesia with a diameter of 1-0mm, 11% of 325-mesh fused spinel, 5% of 180-mesh graphite, 5% of 1μm a-alumina powder, 1.5% of sintering agent, 7% of aluminum-silicon alloy powder and 4% resin, according to the mixing amount of 500 kg per machine, first turn on the automatic pressure-adjusting lifting type kneading machine, then put in the granular plate-shaped corundum and 98 magnesia, add the resin after 5 minutes, and after 8-10 minutes After mixing, put in fine powder materials such as fused spinel, graphite, a-alumina micropowder, sintering agent and aluminum-silicon alloy powder, stir for 8-10 minutes and then pressurize for 15 minutes. After the pressurization is completed, lift the roller o...

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Abstract

The invention discloses a novel slide plate brick for an automatic slag-retaining slide gate of a converter and a preparation method of the slide plate brick. The slide plate brick is characterized by containing the following components in percentage by weight: 58%-68% of tabular corundum, 6%-8% of 98 magnesia, 8%-11% of electrically-fused spinel, 3%-5% of graphite, 4%-7% of a-aluminum oxide powder, 1%-2% of sintering agent, 2%-7% of aluminum-silicon alloy powder and 4%-5% of resin. The slide plate brick can be prepared from the components through the processes of mixing, shaping, drying, sintering, oil immersing, roasting, and machining. By virtue of adjustment on the formula of the slide gate brick and simplification on the production technology of the slide gate brick, the comprehensive performance of the slide gate brick is enhanced, the direct benefit of slag-free tapping with the slide plate brick is high, and beneficial conditions are provided for development of good-quality steel grades, so that the slide plate brick and the preparation method of the brick have a very wide application prospect and remarkable economic and social benefits.

Description

technical field [0001] The invention relates to a novel sliding brick for automatic slag-retaining sliding nozzle of a converter and a preparation method thereof. Background technique [0002] With the rapid development of the steel industry, users' requirements for steel quality are increasing day by day. Therefore, the production of high-quality, high-tech, high-value-added high-quality steel products has become an inevitable choice for iron and steel enterprises. The quality of molten steel directly affects the performance of steel. Reducing the amount of slag in the tapping process of the converter is an important link to improve the quality of molten steel. How to reduce the amount of slag during the tapping process of the converter is a technical problem that has plagued the iron and steel industry for a long time, and has become a restrictive factor for the converter to smelt special steel and high-quality steel. In converter steelmaking production, a large amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 杭文明王远林
Owner 无锡市南方耐材有限公司
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