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 bla

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

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

[0021] a. Mixing materials: Weigh the raw materials according to the ratio, and the mass of the raw materials shall not exceed 100 kg. When mixing the materials, add 5-7% of the total weight of the raw materials, and the mixing speed shall not exceed 90m / min, to ensure uniform mixing , The mixing time is not less than 20 minutes, and the mixing temperature is greater than 10℃;

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

[0023] c. Room temperature curing: curing temperature 10-25℃, curing time 25-30 minutes;

[0024] d. High-temperature curing: first hold at 50°C for 0.5 hours, then evenly heat up to 200°C over 24 hours, k...

Example Embodiment

[0027] Example 1: Weigh the raw materials according to the following table:

[0028] name Weight Kgname Weight Kg Premium Coke Gem40.5 Silicon powder4.0 Sintered Mullite18 Spodumene5.0 Floating beads4.5 Kyanite4.0 Alumina hollow ball6.5 sodium tripolyphosphate0.2 Alumina powder8.0 Dispersant 1.5

[0029] Add 6.454Kg of water and mix the above raw materials, mix the speed of 90m / min, mix the time for 20 minutes, and mix the temperature of 20℃; after mixing, the insulation material will be poured within 15 minutes, and the pouring process will be vibrated and vibrated at the same time The frequency is greater than 2900 times / min, to ensure full up and down, front and back pouring, smooth material flow, and filling deep into each structure, so that attachments and bubbles are fully discharged from the cast body; normal temperature curing: curing temperature is 20 ℃, curing time 25 Minutes; high-temperature curing: first hold at 50°C for 0.5 hours, then evenly heat up to 200°C...

Example Embodiment

[0030] Example 2: Weigh the raw materials according to the following table:

[0031] name Weight Kgname Weight Kg Premium Coke Gem43.5 Silicon powder3.3 Sintered Mullite17.0 Spodumene4.3 Floating beads3.6 Kyanite4.1 Alumina hollow ball7.4 sodium tripolyphosphate0.26 Alumina powder7.5 Dispersant 2.6

[0032] Add 6 Kg of water to the above raw materials and mix the material, the mixing speed is 90M / min, the mixing time is 25 minutes, and the mixing temperature is 15℃; after mixing, the insulation material will be poured within 15 minutes, and the pouring process will be vibrated at the same time. More than 2900 times / min, to ensure full up and down, front and back pouring, smooth material flow, filling into the depths of each structural member, so that attachments and bubbles are fully discharged from the casting body; normal temperature curing: curing temperature is 22 ℃, curing time 30 minutes ; High-temperature curing: first hold at 50°C for 0.5 hours, then evenly increas...

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PUM

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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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