A kind of zrsio4-mgo material and preparation method thereof

Abstract

The invention provides a ZrSiO4-MgO material and a preparation method thereof. According to a technical scheme in the invention, the preparation method comprises the following steps: placing magnesia fine powder and nickel-containing mixed liquor in a mass ratio of 1: 2 in a ball mill and carrying out mixing and milling for 0.5 to 6 h so as to obtain mixed slurry; draining the mixed slurry through filtering and then carrying out drying at 110 DEG C for 24 h so as to obtain a mixture block; and maintaining the mixture block at 1000 to 1400 DEG C for 1 to 6 h, then cooling the mixture block and carrying out ball milling until a particle size of 1 to 200 [mu]m is obtained so as to obtain the ZrSiO4-MgO material. A preparation method for the nickel-containing mixed liquor comprises the following steps: mixing silicon tetrachloride with a zirconium tetra-n-butoxide solution according to an atomic mol ratio of Si to Zr of 1: 1 so as to obtain a mixed solution; and adding nickel nitrate into the mixed solution according to a mass ratio of the mixed solution to nickel nitrate of 1: (0.001-0.2) and carrying out mixing so as to obtain the nickel-containing mixed liquor. The ZrSiO4-MgO material prepared in the invention has the characteristics of high refractoriness, good hydration resistance, high wear and corrosion resistance, good erosion resistance and excellent slag penetration resistance.

Description

technical field [0001] The invention belongs to the technical field of magnesia refractories. In particular a ZrSiO 4 -MgO material and its preparation method. Background technique [0002] Magnesia is currently the most widely used type of refractory material, and its main mineral raw material is magnesia. Magnesia is mainly divided into three types: sintered magnesia, seawater magnesia and fused magnesia. Sintered magnesia is mainly calcined at high temperature by magnesite, brucite or magnesium hydroxide extracted from seawater. The burnt magnesite fired with natural magnesite as raw material is called sintered magnesite, and the magnesite is smelted with electric arc furnace as raw material to reach a molten state and then cooled, which is called fused magnesia, which is extracted from seawater and oxidized. Magnesium is called seawater magnesia. With the technical progress of high temperature industry and the development of refractory material technology, various r...

AI Technical Summary

Problems solved by technology

[0003] However, amorphous and carbon-free magnesia refractories have common disadvantages, namely: poor slag resistance, easy peeling, easy hydration, and cracks during drying, which affect the use of magnesia products. This has led to the fact that castables have become the main types of unshaped refractory materials at home and abroad, while the proportion of magnesium castables is very low.

There are two main reasons for this: 1) magnesia is easy to hydrate and magnesia castables are prone to cracks during the drying process; 2) the chemical composition of magnesia is MgO, and MgO is easy to combine with other impurity oxides such as CaO and SiO at high temperatures. 2 , Fe 2 o 3 and Al 2 o 3 Chemical reaction occurs to form low-melting point compounds, which not only reduces the load softening temperature of magnesia materials, but also reduces the slag penetration resistance of magnesia materials