Spinel-yttrium aluminum garnet fireproof material and preparation method thereof

Abstract

The invention relates to a spinel-yttrium aluminum garnet fireproof material and a preparation method thereof. The preparation method comprises the following steps: firstly with 40-50wt% of magnesia particles, 10-30wt% of spinel particles, 10-20wt% of magnesia powder, 10-20wt% of alumina powder, 3-7wt% of spinel powder and 0.5-7wt% of dry blend material as raw materials, additionally adding a binding agent accounting for 3-7wt% of the raw material, stirring uniformly, and carrying out mechanical pressing; and then drying a moulded green body for 12-36 hours at 110 DEG C, then baking at 1450-1650 DEG C, preserving heat for 2-8 hours to obtain the spinel-yttrium aluminum garnet fireproof material. The preparation method of the dry blend material comprises the following steps: firstly with 20-40wt% of metal aluminum powder, 25-40wt% of aluminum nitride and 30-50wt% of compound containing yttrium as the raw materials, putting the raw materials into a ball mill for dry blending uniformly, and preparing the dry blend material. The prepared spinel-yttrium aluminum garnet fireproof material not only has higher refractoriness, refractoriness under load and high temperature strength, but also has good anti-erosion performance and thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of spinel refractory materials. It specifically relates to a spinel-yttrium aluminum garnet refractory material and a preparation method thereof. Background technique [0002] Magnesium-aluminum spinel is widely used in the refractory industry due to its high melting point, high hardness, excellent thermal shock resistance and slag erosion resistance. Especially in recent years, it has been recognized that Cr 6+ Due to the hazards of chemical compounds, spinel refractories are used in cement rotary kilns, glass kilns and refining equipment to replace chromium-containing materials. However, spinel-based refractories have low high-temperature strength and poor corrosion resistance, such as corrosion resistance to metallurgical slag and cement clinker, which greatly limits their application in the above-mentioned industrial fields. [0003] In the prior art, by adding SiO 2 , Fe 2 o 3 、TiO 2 , ZrO 2 Add...

AI Technical Summary

Problems solved by technology

However, spinel refractories have low high-temperature strength and poor corrosion resistance, such as resistance to metallurgical slag and cement clinker, which greatly limits their application in the above-mentioned industrial fields

[0003] In the prior art, by adding SiO 2 , Fe 2 o 3 、TiO 2 , ZrO 2 Additives such as rare earth metal oxides or rare earth metal oxides promote the sintering and densification of materials, improve the structure and corrosion resistance of materials, but still cannot make up for the thermal shock stability and high temperature creep resistance of spinel refractories. Defects

Therefore, the application of spinel refractory materials in high temperature industrial fields such as metallurgy, building materials, electromechanical, and chemical industry is greatly limited.

[0004] Therefore, there are some deficiencies in the preparation methods of spinel materials, such as low refractoriness, poor erosion resistance and thermal shock stability, low load softening temperature and high temperature strength

Unable to meet the requirements of key refractory products in the high temperature industrial field