Magnesium aluminate binder

Abstract

A magnesium aluminate bonding agent is characterized in that the magnesium aluminate raw material is formed by the mixture ratio of the following weight percent. The inorganic composition components consist of aluminum sulphate, citric acid, boric acid and magnesia. The product is characterized by carbon free, inorganic combination, no need of high temperature sintering, which can be used after drying at 100 to 200 DEG C, thus greatly reducing the production cost, reducing molten steel pollution and improving the service life. The product can be used in the tank lining, tundish lining, quadrel, air permeable upper quadrel, filling pipe end, drain end, slag dam and steel-tapping hole. The product has the performance of slag adhesion resistance, pretty high high-temperature, medium-temperature and low-temperature strength and has the advantages of reducing molten steel inclusion by more than 90 percent, relieving the labor strength of the workers, shortening masonry labor hour, accelerating the turnover of the molten steel tank for 5-10 times comparing with the existing product. Furthermore, the product has excellent hydration resistance, which can be immersed in the water for 30 days without any change, thus facilitating deposition.

Description

technical field [0001] The invention relates to a binder, in particular to a magnesium aluminate binder for producing aluminum-chrome unfired refractory bricks. Background technique [0002] At present, most of the binders are organic compositions, which are easy to burn at high temperatures and cause pollution. The magnesium aluminate binder of the present invention is an inorganic composition, which is a new material produced by advanced technology and nanotechnology, and is used as a binder for basic refractory materials. Instead of phenolic resin to produce magnesia-carbon bricks, it is a major breakthrough in alkaline materials, and it also expands the production range of alkaline refractory materials. This product can also be used in the production of unfired magnesia-chrome bricks, magnesia-alumina bricks and magnesia-calcium bricks. The use of this product greatly reduces the production cost, does not require sintering, the production process is simple, has high st...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the binders are organic compositions, which are easy to burn at high temperatures and cause pollution.