Alumina and MgO preheatable insulating refractory liners and met

Details Alumina and MgO preheatable insulating refractory liners and met Alumina and MgO preheatable insulating refractory liners and met

1984-10-30

1987-10-27

Seccuro, Carman J.

Compositions: ceramic

Ceramic compositions

Refractory

501119, 501109, 501120, 266280, 266284, 523139, 523141, C04B 3504, C04B 3510

Patent

active

047030224

ABSTRACT:
Novel preheatable molded refractory insulating liners and methods of use thereof for lining metallurgical vessels, such as hot tops, ladels, tundishes, troughs and pipes, etc., which serve to transfer molten metals, such as ferrous alloys, are disclosed. The new and vastly improved preheatable liners are suitable for developing effectively the required hot strength needed for casting molten metals at vessel preheat temperatures and casting temperatures. The unique preheatable liners additionally possess the needed hot strength during the range of casting temperatures as are experienced in the metal making industry. The preheatable molded refractory insulating liners comprise a liner structure of predetermined shape, the liner structure comprising a molded uniform mixture containing a particulate refractory component comprised of alumina and MgO refractory grain and a binder therefore wherein the alumina and MgO refractory grain are in amounts proportioned such that the hot strength is developed at vessel preheat and metal casting temperatures which are in the range of about 1900.degree. F. to about 3000.degree. C. when such liners are heated for sufficient periods of time.

REFERENCES:
patent: 3514302 (1970-05-01), Willmore et al.
patent: 3578473 (1971-05-01), Alper et al.
patent: 3917110 (1975-11-01), Kiguchi
patent: 3993620 (1976-11-01), Yamanishi et al.
patent: 4387173 (1983-06-01), Henry et al.
Harbison-Walker Refractories, "H-W Handbook of Refractory Practice", Second Edition, pp. 47-65.

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