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High-performance heat-insulation wear-resistant material and preparation method thereof

A wear-resistant material and high-performance technology, which is applied in the field of high-performance heat-insulating wear-resistant materials and their preparation, can solve the problem that the performance of heat-insulating materials cannot meet the technical requirements of iron-making blast furnaces, the temperature of the outer wall of the air supply device system is high, and the iron-making process is difficult. The blast furnace air-off rate is unstable and other problems, so as to improve the working efficiency of the blast furnace, reduce the temperature of the outer wall, and reduce the thermal conductivity.

Inactive Publication Date: 2012-12-12
QINGHUANGDAO NORTH METAL HOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the heat insulation material layer of the blast furnace air supply device generally has serious defects such as easy incineration, falling off, short service life, high temperature of the outer wall of the air supply device system, and air leakage in high temperature areas. These defects restrict the continuous operation of the ironmaking blast furnace system. Unstable shutdown rate of ironmaking blast furnace
The reason is mainly due to the fact that there are many deficiencies in the ratio of raw materials and process steps in the heat insulation material, resulting in the performance of the heat insulation material not meeting the technological requirements of the ironmaking blast furnace.

Method used

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Effect test

preparation example Construction

[0020] The preparation method of the heat-insulating wear-resistant material of the present invention is as follows:

[0021] a. Blending: Weigh each raw material according to the ratio. The mass of blending at one time should not exceed 100 kg. When blending, add water with 5-7% of the total weight of raw materials. The speed of blending should not exceed 90m / min. In order to ensure uniform blending , the mixing time is not less than 20 minutes, and the mixing temperature is greater than 10°C;

[0022] b. Pouring: Complete the pouring of the heat-insulating and wear-resistant material within 15 minutes after mixing the materials (pouring into a semi-viscous state), vibrate at the same time during the pouring process, and the vibration frequency is greater than 2900 times / min;

[0023] c. Curing at room temperature: curing temperature 10-25°C, curing time 25-30 minutes;

[0024] d. High-temperature curing: first keep warm at 50°C for 0.5 hours, then uniformly heat up to 200...

Embodiment 1

[0027] Embodiment 1: take raw material according to the following table proportioning:

[0028] name Weight Kg name Weight Kg Superior Burnt Gemstones 40.5 Silica powder 4.0 Sintered mullite 18 spodumene 5.0 floating beads 4.5 Kyanite 4.0 Alumina Hollow Ball 6.5 sodium tripolyphosphate 0.2 Aluminum oxide powder 8.0 Dispersant 1.5

[0029] Add 6.454Kg of water to the above-mentioned raw materials, mix the material at a speed of 90m / min, mix the material for 20 minutes, and mix the material at a temperature of 20°C; complete the pouring of the heat insulation material within 15 minutes after mixing, and vibrate and vibrate at the same time during the pouring process The frequency is greater than 2900 times / min, ensuring sufficient up and down, front and back pouring, smooth material flow, and filling to the depth of each structural part, so that attachments and air bubbles are fully discharged from the pouring body; n...

Embodiment 2

[0030] Embodiment 2: take raw material according to the following table proportioning:

[0031] name Weight Kg name Weight Kg Superior Burnt Gemstones 43.5 Silica powder 3.3 Sintered mullite 17.0 spodumene 4.3 floating beads 3.6 Kyanite 4.1 Alumina Hollow Ball 7.4 sodium tripolyphosphate 0.26 Aluminum oxide powder 7.5 Dispersant 2.6

[0032]Add 6 Kg of water to the above raw materials and blend, blend speed 90M / min, blend time 25 minutes, blend temperature 15°C; complete the pouring of the heat insulation material within 15 minutes after blending, and vibrate simultaneously during the pouring process, and the vibration frequency More than 2900 times / min, to ensure sufficient up and down, front and back pouring, smooth material flow, filling to the depth of each structural part, so that attachments and air bubbles can be fully discharged from the pouring body; normal temperature curing: curing temperature is 22 ° C, ...

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Abstract

The invention relates to a high-performance heat-insulation wear-resistant material and a preparation method thereof, and is used for solving the problems of high incineration and shedding tendency at the high temperature region, short service life and the like in the heat-insulation material of the blast-furnace air supply device. The technical scheme is as follows: the material is prepared from the following raw materials in parts by weight: 40.5-45.5 parts of flint clay, 15.3-20.5 parts of sintered mullite, 3.2-4.5 parts of floating bead, 5.5-7.4 parts of aluminum oxide hollow sphere, 7.2-8.5 parts of aluminum oxide micropowder, 3.3-5.6 parts of silicon micropowder, 4.3-6.5 parts of spodumene, 3.5-4.5 parts of kyanite, 0.1-0.3 part of sodium tripolyphosphate and 1.5-3.2 parts of dispersant. The method comprises the following steps: mixing the materials, pouring, curing at normal temperature, curing at high temperature and the like. The technique provided by the invention is suitable for preparation and technical pouring of the heat-insulation material of which the heat-insulation layer structure is 25-30mm; and the heat-insulation material has the characteristics of high compaction and folding strength, small heat conductivity coefficient and the like, and can satisfy the technical requirements for heat-insulation materials of blast-furnace air supply devices.

Description

technical field [0001] The invention relates to a heat-insulating refractory material and a preparation method thereof, in particular to a high-performance heat-insulation and wear-resistant material suitable for the process pipeline of the air supply device of a metallurgical ironmaking blast furnace and a preparation method thereof. Background technique [0002] In ironmaking equipment in the field of metallurgy and iron and steel, heat insulation materials are widely used in pipelines used in all processes above 600 °C. Among them, the blast furnace air supply device for ironmaking is to send hot air at 1200-1350°C heated by the hot blast stove into the blast furnace. Safe operation requires the air supply device to reduce the external temperature below 150°C from the hot air temperature of the internal medium of 1200-1350°C through the implemented fire-resistant and heat-insulating material layer. Due to the structural size limitation of the air supply device, the thick...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 吴磊王建民宋红伟赵光郑群
Owner QINGHUANGDAO NORTH METAL HOSE
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