METHOD OF PRODUCTION OF ACTIVE ALUMINA η-ALO AND HEAT-RESISTANT BINDER MADE ON ITS BASE Russian patent published in 2004 - IPC

Abstract RU 2233813 C1

FIELD: manufacture of building materials; manufacture of heat-resistant binders.

SUBSTANCE: active alumina is produced by roasting aluminum hydroxide Al(OH)₃ at temperature of partial dehydration; roasting is performed at temperature of 600-800 C and specified rate of heating of 200-250 C/h; immediately after roasting, material is subjected to cooling. Heat-resistant binder contains partially dehydrated aluminum oxide and calcium aluminates; aluminum hydroxide contains and high-alumina cement is taken as calcium aluminate at the following relationship of components. mass-%:partially dehydrated aluminum hydroxide, 40-80; high-alumina cement, 20-60. Content of in aluminum hydroxide ranges from 30 to 50% by mass.

EFFECT: accelerated solidification of binder; enhanced strength.

3 cl, 3 tbl

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RU 2 233 813 C1

Authors

Shaimov M.Kh.

Korolev A.S.

Sosnin V.P.

Trofimov B.Ja.

Ob"Edkov E.N.

Dates

2004-08-10—Published

2002-12-09—Filed