A sialon bonded corundum composite refractory prefabricated part containing metal plastic phase

Abstract

The invention discloses a Sialon-bonded corundum composite pre-cast refractory member containing a metal plastic phase. The Sialon-bonded corundum composite pre-cast refractory member is prepared by additionally adding a dispersing agent and water or silica sol into raw materials of corundum aggregate, corundum fine powder, SiC fine powder, Si powder, ferro-silicon alloy powder, Al2O3 micro powder, pure calcium aluminate cement, hydrated alumina and SiO2 micro powder, forming by a vibration casting method and then carrying out in situ nitridation reaction. According to the Sialon-bonded corundum composite pre-cast refractory member disclosed by the invention, a Fe-Sialon-corundum composite refractory with low production cost, good thermal shock stability, good toughness and the metal plastic phase is prepared by introducing quantitative ferro-silicon alloy powder and using optimized combination of the raw materials, reasonable particle size distribution and simple vibration casting method.

Description

technical field [0001] The invention relates to a Sialon-bonded corundum composite refractory material, in particular to a Fe-Sialon-bonded corundum composite refractory preform formed by in-situ nitriding by adding ferrosilicon alloy powder and a preparation method thereof, belonging to the field of refractory materials. Background technique [0002] Sialon combined with corundum composite material has excellent properties such as high temperature strength, small thermal expansion coefficient, good slag resistance and wear resistance. It is widely used in high temperature fields such as blast furnace ironmaking, electrolytic aluminum and kiln furniture and has achieved good results. However, this material has problems such as high brittleness, poor thermal shock stability, and poor thermal conductivity, which limit its further application. [0003] At present, oxide-non-oxide composite refractory products such as: Si 3 N 4 The production of combined SiC bricks, Sialon com...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the common problems of high raw material production cost, high brittleness, poor thermal shock stability and poor thermal conductivity in the existing Sialon bonded corundum composite materials, and propose a low production cost, good thermal shock stability and good toughness. At the same time, complex shapes can be produced, the process is simple and easy to control, the production energy consumption is low, the Sialon bonded corundum composite refractory prefabricated part containing metal plastic phase and its preparation method