Composition in the form of green or thermally treated briquettes comprising at least one quick calcium-magnesium compound comprising an iron-based compound and method of production thereof as well uses thereof.

An unfired, refractory molded body (1), especially a plate, especially for thermal insulation of molten metal and/or an ingot solidifying from molten metal, that includes a binding agent matrix (2) of a set binder and aggregate grains (3) of biogenic silicic acid, preferably of rice husk ash, which are incorporated into the binding agent matrix (2), wherein the binding agent matrix (2) consists of silica gel, as well as a process for its production and its usage.

A heat insulating plate (1), preferably a covering plate (5a;b), especially for thermal isolation of molten metal, especially of molten steel, in a metallurgical vessel (6), wherein the plate (3) includes a binding agent matrix (2) of at least one, set, temporary, organic binding material and aggregate grains (3) with and/or of biogenic silicic acid, preferably with and/or of rice husk ash, which grains (3) are incorporated into the binding agent matrix (2), and to a method for production of the plate (1) and its use.

Composition in the form of green or thermally treated briquettes comprising at least one quick calcium-magnesium compound comprising an iron-based compound and method of production thereof as well uses thereof.

Composition based on quick calcium-magnesium compounds in the form of briquettes, characterised in that said composition comprises quicklime in the form of milled particles at a concentration of at least 10% by weight and at most 100% by weight relative to the weight of said composition, said composition in the form of briquettes having a Shatter test index of less than 10% and the method for preparation and use thereof.

Composition in the form of green or thermally treated briquettes comprising at least one quick calcium-magnesium compound comprising an iron-based compound and method of production thereof as well uses thereof.

The present invention provides the use of lanthanum phosphate for creating non wetting, non-reactive surfaces for molten metals like zinc and aluminium. By virtue of this property, lanthanum phosphate finds extensive applications in metallurgical industry for metal casting.