Magnesite-carbon refractories

Details Magnesite-carbon refractories Magnesite-carbon refractories

1990-03-22

1990-09-18

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

266280, 266286, C04B 3504, C04B 3554

Patent

active

049578871

ABSTRACT:
A mix for forming a carbon-bonded refractory comprising from about 8 to 30 wt. % of a high purity carbon, about 0.1 to 1 wt. % of aluminum metal, magnesium metal, or a mixture thereof, and the balance a high purity magnesite, and for each 100 wt. % of said magnesite, carbon, and metal, a carbonaceous bonding agent in an amount sufficient to bond the mix; said carbon containing at least about 98% carbon and said magnesite containing at least about 98% MgO, and containing less than about 0.03% boron oxide, less than about 0.3% silica, and having a CaO/SiO.sub.2 weight ratio above about 2, and the resultant carbon-bonded refractory shapes and liners for metal processing equipment, especially BOF, made from such shapes and the method of increasing the life of liners for such equipment.

REFERENCES:
patent: 4306030 (1981-12-01), Watanabe et al.
patent: 4431745 (1984-02-01), Watanabe et al.
patent: 4454239 (1984-06-01), Cassens, Jr.
patent: 4912068 (1990-03-01), Michael

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