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A converter automatic slag retaining sliding nozzle nozzle brick and its preparation method

The technology of sliding nozzle and nozzle brick is applied in the field of new type converter automatic slag blocking sliding nozzle nozzle brick and its preparation field, which can solve the problems of poor control of slag blocking timing, inability to prevent slag from the converter, frequent replacement of parts, etc., and achieve excellent performance. Thermal shock stability, good slag erosion resistance, narrow composition and effect of narrow temperature control

Active Publication Date: 2016-01-20
无锡市南方耐材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A converter automatic slag retaining sliding nozzle nozzle brick and its preparation method

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Effect test

Embodiment 1

[0038] A new type of preparation method for the automatic slag-retaining sliding nozzle nozzle brick of the converter. The selected weight percentages are: 25% of 98 fused magnesia with a particle diameter of 3-1 mm, and 98 fused magnesia with a particle diameter of 1-0 mm. Magnesia 45%, 325 mesh fused spinel 10%, 200 mesh Guangxi soil 4%, N330 carbon black 8%, 325 mesh aluminum powder 3%, 320 mesh metal silicon powder 2%, phenolic resin 5%, Among them, the 98 fused magnesia is crushed and screened for batching, put into a pressurized or high-speed kneading machine and mixed for 5 to 6 minutes, then add a phenolic resin binder, and then add a fused tip after the particles are covered with a layer of resin The premixed powder of spar, Guangxi soil, carbon black, metal aluminum powder, and metal silicon powder is mixed for 25 to 35 minutes and discharged. The molding adopts a hydraulic press of more than 600 tons. According to the shape and size of the brick, the mud is accuratel...

Embodiment 2

[0040] A new type of preparation method for automatic slag-retaining sliding nozzle nozzle bricks of converters. The selected weight percentages are: 20% of 98 fused magnesia with a particle diameter of 3-1 mm, and 98 fused magnesia with a particle diameter of 1-0 mm. Magnesia 40%, 325 mesh fused spinel 12%, 200 mesh Guangxi soil 6%, N330 carbon black 10%, 325 mesh aluminum powder 2.5%, 320 mesh metal silicon powder 4%, phenolic resin 4%, Among them, the 98 fused magnesia is crushed and screened for batching, put into a pressurized or high-speed kneading machine and mixed for 5 to 6 minutes, then add a phenolic resin binder, and then add a fused tip after the particles are covered with a layer of resin The premixed powder of spar, Guangxi soil, carbon black, metal aluminum powder, and metal silicon powder is mixed for 25 to 35 minutes and discharged. The molding adopts a hydraulic press of more than 600 tons. According to the shape and size of the brick, the mud is accurately w...

Embodiment 3

[0042] A new type of preparation method for automatic slag-retaining sliding nozzle nozzle bricks of converters. The selected weight percentages are: 30% of 98 fused magnesia with a particle diameter of 3-1 mm, and 98 fused magnesia with a particle diameter of 1-0 mm. Magnesia 35%, 325 mesh fused spinel 15%, 200 mesh Guangxi soil 5%, N330 carbon black 8%, 325 mesh aluminum powder 2%, 320 mesh metal silicon powder 3%, phenolic resin 4.5%, Among them, the 98 fused magnesia is crushed and screened for batching, put into a pressurized or high-speed kneading machine and mixed for 5 to 6 minutes, then add a phenolic resin binder, and then add a fused tip after the particles are covered with a layer of resin The premixed powder of spar, Guangxi soil, carbon black, metal aluminum powder, and metal silicon powder is mixed for 25 to 35 minutes and discharged. The molding adopts a hydraulic press of more than 600 tons. According to the shape and size of the brick, the mud is accurately we...

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Abstract

The invention discloses a nozzle brick for an automatic slag baffling sliding nozzle of a novel converter and a preparation method thereof. The nozzle brick is characterized by comprising following components in percentage by weight: 55%-75% of 98# fused magnesite, 10%-15% of electrically-fused spinel, 4%-6% of Guangxi soil, 8%-10% of carbon black, 2%-3% of aluminum powder, 2%-4% of metal silicon powder and 4%-5% of phenolic resin. All the components are uniformly agitated, are pressed by a pug machine to be molded, and are dried by a drying oven to obtain a brick blank; the brick blank is machined and packaged to obtain the nozzle brick for the automatic slag baffling sliding nozzle of the novel converter. According to the nozzle brick, the comprehensive performance of the nozzle brick is improved by adjusting the formula of the nozzle brick and simplifying a production process of the nozzle brick; the direct benefits of slag free tapping of the nozzle brick is 2.43 yuan per tonnage of steel, so as to provide beneficial conditions for developing high-quality steel, and furthermore, the nozzle brick has a very wide popularization and application prospect and obvious economic and social benefits.

Description

technical field [0001] The invention relates to a novel converter automatic slag blocking sliding nozzle nozzle brick 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 of molten s...

Claims

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Application Information

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Patent Type & Authority Patents(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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