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Manufacture method of functional refractory for steelmaking

A technology of refractory materials and manufacturing methods, which is applied in the field of manufacturing refractory materials for steelmaking, and can solve problems affecting material porosity, high-temperature strength and corrosion index, failure to meet the requirements of metallurgical processes, and insufficient compactness of the overall structure, etc. , to achieve the effect of improving physical and chemical properties and application effects, promoting progress and innovation, and reducing production process

Inactive Publication Date: 2003-04-30
ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the long process of the above-mentioned manufacturing method, the production cost is relatively high; and because the raw materials are re-formed after being crushed, the internal structure of the finished refractory material is a combination of granular and powdery, and the overall structure is not dense enough. The physical properties of the material, such as density, porosity, high temperature strength, and erosion index, make the fine powder matrix of the material a weak tissue link that is vulnerable to erosion during use.
[0004] With the continuous development of new steel types and the progress of smelting technology in the metallurgical industry, especially the production process of high-purity steel and high-tech steel types (such as ultra-low carbon steel and electrical steel, etc.) has a great impact on the composition and performance of functional refractory materials. , service life and cost put forward higher requirements, and the existing functional refractory products produced by the above-mentioned manufacturing method can no longer meet the requirements of metallurgical technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Mix industrial alumina powder and magnesium oxide powder evenly at a ratio of 76:24, melt them at a high temperature of 2350 ° C to 2150 ° C in an electric arc furnace, and then pour them into a molding die to form a working lining for a ladle slide. .

[0015] After testing, the main performance indicators are:

[0016] Bulk density 3.76g / cm 3 , The apparent porosity is 4%, and the compressive strength is 380Mpa. Load softening temperature T0.6>1700°C, thermal flexural strength 1450°C×0.5h 32Mpa.

Embodiment 2

[0018] Mix industrial alumina powder, zirconia powder and zircon according to the ratio of 50kg, 10kg, and 40kg, and then melt it at a high temperature of 2200°C to 1950°C in a melting electric arc furnace, and then pour it into a molding mold and cast it into shape. Made into the runner in the sliding nozzle system.

[0019] After testing, the main performance indicators are:

[0020] Bulk density 3.95g / cm 3 , The apparent porosity is 1.50%, and the compressive strength is 520Mpa. Load softening temperature T0.6>1700°C, thermal flexural strength 1450°C×0.5h 26Mpa.

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Abstract

A functional refractory for smelting steel is prepared from one or more inorganic materials through mixing, smelting and casting. Its advantages are simple process, low cost, long service life and high smelting temp (1800-3200 deg.C).

Description

technical field [0001] The invention relates to a method for manufacturing a functional refractory material for steelmaking, and belongs to the technical field of manufacturing refractory materials for steelmaking. Background technique [0002] In order to achieve high performance or meet the requirements of metallurgical processes, if it is necessary to have good resistance to melting loss, erosion, erosion and thermal shock, and good high-temperature chemical stability, various high-grade functional refractory products used in the existing metallurgical industry, Functional refractory materials such as ladle slides, upper and lower nozzles and tundish slides, upper, middle and lower nozzles, submerged nozzles, long nozzles, sizing nozzles, and tapholes or grooves of smelting furnaces are all made of high-quality inorganic refractory materials. The materials are crushed into granules or powders, and then sintered by pressing or pouring at a certain rati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C21C5/00
Inventor 王超美薛军柱高雄
Owner ZHEJIANG ZILI HIGH TEMPERATURE TECH CO LTD
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