Energy-saving steel ladle working lining castable and preparation method thereof

A working lining and energy-saving technology, applied in the field of ladle lining refractory materials, can solve the problems of large material aperture, poor thermal shock resistance and service life, high thermal conductivity of materials, etc., and achieve the effect of alleviating the concentration of thermal stress

Inactive Publication Date: 2021-07-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patented technology with the application number 201310094139.2 uses tabular corundum, magnesium aluminum spinel, α-Al 2 o 3 Micropowder, cement, etc. are used as raw materials, and the foaming method is used. After casting, drying, and firing, corundum spinel castables with micro-nanoporous structures are obtained. However, the pore size of the material is too large, and the thermal shock resistance and service life are not good. Jia; patented technologies with application numbers 201410467630.X and 201510550636.8 use microporous corundum-spinel particles and equal-diameter microporous corundum balls as aggregates to prepare lightweight aluminum-magnesium castables and lightweight corundum-spinel Castables, but the thermal conductivity of the prepared material is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of an energy-saving ladle working lining castable is as follows: 60 parts by mass of low thermal conductivity sintered corundum particles are used as aggregate, 15 parts by mass of low thermal conductivity sintered corundum fine powder, 8 parts by mass of fused magnesia fine powder , 14 parts by mass of α-Al 2 o 3 Micropowder, 5 parts by mass of pure calcium aluminate cement as the base material; first premix the base material evenly, then add it to the aggregate, mix evenly, then add water accounting for 5wt% of the raw material, stir evenly, Vibration molding, curing at room temperature for 24 hours, and finally heat preservation at 110°C for 36 hours to produce energy-saving ladle working lining castables;

[0038] The preparation method of described low thermal conductivity sintered corundum particles and low thermal conductivity sintered corundum fine powder is:

[0039]Step 1, adding 0.5 parts by mass of nano-carbon material particles to 100...

Embodiment 2

[0050] A preparation method of an energy-saving ladle working lining castable is as follows: 65 parts by mass of low thermal conductivity sintered corundum particles are used as aggregate, 12 parts by mass of low thermal conductivity sintered corundum fine powder, 7 parts by mass of fused magnesia fine powder , 12 parts by mass of α-Al 2 o 3 Micropowder, 6 parts by mass of pure calcium aluminate cement as the base material; first premix the base material evenly, then add it to the aggregate, mix evenly, and then add water accounting for 4wt% of the raw material, stir evenly, Vibration molding, curing at room temperature for 24 hours, and finally heat preservation at 200°C for 12 hours to produce energy-saving ladle working lining castables;

[0051] The preparation method of described low thermal conductivity sintered corundum particles and low thermal conductivity sintered corundum fine powder is:

[0052] Step 1, adding 1 mass part of nano-carbon material particles to 100 ...

Embodiment 3

[0063] A preparation method of an energy-saving ladle working lining castable is as follows: 70 parts by mass of low thermal conductivity sintered corundum particles are used as aggregate, 10 parts by mass of low thermal conductivity sintered corundum fine powder, 4 parts by mass of fused magnesia fine powder , 10 parts by mass of α-Al 2 o 3 Micropowder, 4 parts by mass of pure calcium aluminate cement as the base material; first premix the base material evenly, then add it to the aggregate, mix evenly, then add water accounting for 5wt% of the raw material, stir evenly, Vibration forming, curing at room temperature for 18 hours, and finally heat preservation at 150°C for 20 hours to produce energy-saving ladle working lining castables;

[0064] The preparation method of described low thermal conductivity sintered corundum particles and low thermal conductivity sintered corundum fine powder is:

[0065] Step 1, adding 1.5 parts by mass of nano-carbon material particles to 10...

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Abstract

The invention discloses an energy-saving type steel ladle working lining castable, and the castable is prepared through the following steps: taking 60-75 parts by mass of low-thermal-conductivity sintered corundum particles as aggregate and 8-15 parts by mass of low-thermal-conductivity sintered corundum fine powder, 2-8 parts by mass of fused magnesite fine powder, 8-15 parts by mass of alpha-Al2O3 micro powder and 3-7 parts by mass of pure calcium aluminate cement as matrix materials; uniformly premixing the matrix material, adding the matrix material into the aggregate, uniformly mixing, additionally adding water accounting for 3-6wt% of the raw materials, uniformly stirring, carrying out vibration molding, maintaining at room temperature for 12-24h, and finally carrying out heat preservation at 110-200 DEG C for 12-36h to prepare the energy-saving steel ladle working lining castable. The energy-saving steel ladle working lining castable prepared by the invention has the characteristics of low heat conductivity, good thermal shock resistance and long service life.

Description

technical field [0001] The invention relates to the technical field of ladle lining refractory materials, and more specifically relates to an energy-saving ladle working lining castable and a preparation method thereof. Background technique [0002] With the urgent requirement of energy saving and consumption reduction in high-temperature industry, and the development of refractory materials to save resources, the lightweight of refractory materials has become one of its important development directions. The ladle is an important equipment for the storage, transportation and secondary refining of molten steel. During the service process, the refractory material has a long contact time with the molten steel, the temperature is high, and it participates in the physical and chemical reactions of the metallurgical process. Therefore, the energy-saving and Guaranteeing service life has important practical significance. [0003] The patented technology with the application number...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/3222C04B2235/422C04B2235/9607
Inventor 付绿平唐少鹏顾华志黄奥张美杰
Owner WUHAN UNIV OF SCI & TECH
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