MgO-SiC-C fire resistant pouring material based on forsterite and method for preparing same

Abstract

The invention relates to a MgO-SiC-C fireproof casting material based on forsterite-C and a preparation method thereof. In the technical proposal, forsterite and C powder are mixed according to the mol ratio of (1 to 4) to (3 to 6), and a binder of 1 to 10 percent of the mixture by weight is added. After the mixture is beaten, moulded and dried, the mixture is synthesized into MgO-SiC-C material for two to eight hours at the temperature of 1450 to 1700 DEG C under the reducing atmosphere. 10-25 weight percent of 10-5mm granule, 15-25 percent weight of 5-3mm granule, 15-25 weight percent of 3-1mm granule, 10-20 weight percent of 1-0mm granule, 25-35 weight percent of 0.1-0mm fine powder are mixed with 2-8 weight percent of the binder, and are beaten uniformly, thus getting the MgO-SiC-C fireproof casting material. The manufacturing cost of the invention is low; the process is simple; and the fireproof casting material prepared has good performance, and is widely applied.

Description

technical field [0001] The invention belongs to the technical field of MgO-SiC-C refractory castables. In particular, it relates to a forsterite-C based MgO-SiC-C refractory castable and a preparation method thereof. Background technique [0002] MgO-SiC-C composite refractory material has excellent high temperature resistance and thermal stability. It is a new type of furnace lining material for non-ferrous metal and iron and steel smelting equipment, especially suitable for the production of clean steel ladles such as low carbon steel and ultra-low carbon steel. Lining and refining furnace lining. Replacing MgO-C material with MgO-SiC-C composite refractory material can overcome the influence of C increase on molten steel due to furnace lining 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 refractories is to use magnesia and industrial SiC as the main raw materials, and...

AI Technical Summary

Problems solved by technology

[0003] The existing production and preparation method of MgO-SiC-C refractories is to use magnesia and industrial SiC as the main raw materials, and use phenolic resin as the binder (ZL 200610019553.7), which is produced by mechanical mixing and then compression molding. The advantage of the method is to replace graphite (C) with industrial SiC to ensure the corrosion resistance and thermal shock resistance of the material. The problem is that magnesia resources are becoming increasingly scarce, and the market prices of magnesia and industrial SiC are getting higher and higher. MgO-SiC -The production cost of C-quality refractories is also increasing; in addition, MgO and SiC are combined by phenolic resin, which is carbonized at high temperature, and the bonding effect is weak, which affects the high-temperature strength and erosion resistance of the material