MgO-SiC-C refractory material synthesized by forsterite-C and method

Abstract

The invention relates to MgO-SiC-C refractory material synthesized by forsterite-C and a method. The technical proposal to be adopted is as follows: firstly, forsterite mineral powder and industrial carbon powder are blended according to molar ratio of 1: (1-5); and then the mixture is added with 4 to 10 wt% of bonding agent, stirred or mulled for 10 to 30 minutes, pressed to be formed and dried; and finally under the Ar gas condition, the mixture is sintered in the sintering temperature of 1530 to 1800 DEG C with heat preservation for 2 to 8 hours to obtain MgO-SiC-C refractory material synthesized by forsterite-C. The invention is characterized by comparatively simple processing technique, low producing cost, high producing efficiency, wide raw material source and being capable of reducing energy consumption of high temperature synthesis reaction. The prepared MgO-SiC-C refractory material has the advantages of excellent high temperature performance, anti-corrosion and good durability.

Description

technical field [0001] The invention belongs to the technical field of MgO-SiC-C refractory materials. Specifically, it relates to a forsterite-C synthetic MgO-SiC-C refractory material and a method thereof. Background technique [0002] MgO-SiC-C composite materials have excellent high temperature resistance and thermal stability, can be used in non-ferrous metals and iron and steel smelting equipment, and can also be prepared into high-quality high temperature resistant heat insulation materials and wall materials for high temperature kilns, especially It is suitable for the ladle lining and refining furnace lining of clean steel such as low carbon steel and ultra-low carbon steel, replacing MgO-C material, which is beneficial to the quality of steel and has a good use effect. [0003] The existing production and preparation method of MgO-SiC-C composite material is to use magnesia and industrial SiC as the main raw materials, use phenolic resin as the binder, adopt mecha...

AI Technical Summary

Problems solved by technology

[0003] The existing production and preparation method of MgO-SiC-C composite material is to use magnesia and industrial SiC as the main raw materials, use phenolic resin as the binder, adopt mechanical mixing and then be produced by pressure mechanical pressing (such as ZL200610019553.7 ), the advantage of this type of method is to replace graphite (C) with industrial SiC to ensure the corrosion resistance and thermal shock resistance of the material, but magnesia resources are becoming increasingly scarce, and the market prices of magnesia and industrial SiC are getting higher and higher. The production cost of MgO-SiC-C composite materials is also continuously increasing; in addition, MgO and SiC are combined by phenolic resin, and the bonding effect of phenolic resin at high temperature is poor, which affects the high temperature strength and erosion resistance of the material

The applicant applied for the patent technology of "MgO-SiC-C composite material synthesized by forsterite-carbon and its preparation method" (CN101306952A). Reducing atmosphere conditions generally need to be protected by carbon particles. Therefore, the reaction raw materials or blanks must first be put into a high-temperature resistant sagger, and the surroundings are filled with carbon particles to cover the reaction raw materials or blanks, so that the reducing atmosphere conditions can be generated under high temperature conditions. , in order to facilitate the material synthesis reaction and protect the reaction product, so there will be a problem affecting the kiln loading capacity, that is, the high temperature resistant saggar and filled carbon particles occupy a large amount of kiln interior space, reducing the reaction raw materials or The kiln quantity of blanks will affect the production efficiency; in addition, the damage of high temperature resistant saggar and the oxidation, ablation and scattering of filled carbon particles caused in the production process will inevitably increase the production cost; and the high temperature resistant sagger and filled carbon particles Each time it is heated to a high temperature of 1530-1800°C in the kiln, a large amount of heat is consumed, resulting in waste of energy, and the assembly and disassembly of the high-temperature-resistant sagger and filling of carbon particles also increase the labor intensity of the operators.