High strength non-cement corundum castable material used in heating furnace

A castable, cement-free technology, applied in the field of high-strength cement-free corundum castables for heating furnaces, can solve problems such as no reports yet, achieve the effects of simple production process, improved sintering performance, and maintained continuity

Active Publication Date: 2011-09-21
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The castable matrix generally adopts a material with a slightly higher grade than the aggregate. Adding a small amount of alumina fine powder to the corundum castable to improve the sintering performance and increase the thermal flexural strength has not yet been reported.

Method used

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  • High strength non-cement corundum castable material used in heating furnace
  • High strength non-cement corundum castable material used in heating furnace
  • High strength non-cement corundum castable material used in heating furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: The proportion of each component is (mass percentage) fused brown corundum particles 65%, fused brown corundum fine powder 9%, high alumina fine powder 18%, silica micropowder 4%, activated alumina Micropowder 4%, active magnesium oxide (additional) 0.2%, sodium citrate 0.04% (additional).

Embodiment 2

[0032] Example 2: The proportion of each component is (mass percentage): 67% of fused brown corundum particles, 10% of fused brown corundum fine powder, 16% of high alumina fine powder, 5% of silica micropowder, activated alumina Micropowder 2%, activated magnesium oxide (additional) 0.3%, citric acid 0.04% (additional).

Embodiment 3

[0033] Example 3: The proportion of each component is (mass percentage) fused brown corundum particles 68%, fused brown corundum fine powder 9%, high alumina fine powder 14%, silica micropowder 6%, activated alumina Micropowder 3%, active magnesium oxide (additional) 0.4%, ammonium citrate 0.08% (additional).

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Abstract

The present invention relates to high strength non-cement corundum castable material used in a heating furnace. The high strength non-cement corundum castable material used in the heating furnace is prepared by adding an amount of activated magnesia and high alumina bauxiteinto powder into Al2O3-SiO2 series non-cement corundum castable material. The activated magnesia and high alumina bauxite into power increase the temperature when the liquid phase of the non-cement corundum castable material begins to appear, improves the sintering character of pouring materials, solves the shortcoming that when the high strength non-cement corundum castable material used in the heating furnace is used, the thermal state rupture strength is lower, and obviously improves the elevated temperature performance of the castable materials. The high strength non-cement corundum castable material prepared by the invention is mainly used in the heating furnace used in iron and steel industries and high temperature condition of usage temperature of 1200 DEG C-1350 DEG C; the castable material also can be molded into prefabricated members by casting for being used.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a high-strength cement-free corundum castable for heating furnaces. Background technique [0002] With the development of society, energy saving and consumption reduction have attracted more and more attention. The pusher type heating furnace is one of the main types of steel rolling heating furnaces. The adoption of water-free cooling technology reduces the energy consumption of the heating furnace, saves energy, and reduces the gas waste generated by fuel combustion. The development of this technology has attracted widespread attention. . The heating furnace using water-free cooling technology puts forward higher technical requirements for the castables used, requiring the castables to have better thermal flexural strength and high-temperature mechanical properties. At present, the castables for the working lining of the heating furnace ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/66
Inventor 李志刚李红霞张晔张振燕
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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