GB211944A - - Google Patents

Abstract

211,944. Hodson, J. Nov. 28, 1922. Refractory substances containing magnesite, dolomite, &c.-Refractory bricks, furnace linings, retorts &c. are made from raw, or a mixture of raw and incinerated naturally-occurring rocks containing magnesium and calcium carbonate such as dolomite or magnesite, together with (1) talc, steatite, or other magnesium silicate, or (2) igneous rocks with or without basic iron ores, or (3) silica sand with either magnesium silicate, or igneous rock or clay, the mixture being moulded with or without a glutinous binder and burnt, or burnt to a plastic state and subsequently moulded. Several examples are given of which the following are typical :-15 per cent of silica is mixed with 5 per cent of serpentine, 10 per cent of raw dolomite, and 70 per cent of burnt dolomite, or 92¢ per cent of raw magnesite is mixed with 5 per cent silica sand and 2¢ per cent of clay. Specifications 14981/10, 23725/12, 110,147 and 197,791 are referred to.