Abstract
Dead burned magnesite without free lime and with an alcohol sulfite binder is recommended for the production of carbon free ramming mixtures. Magnesite mixtures with the above binder retain high refractoriness and are sufficiently resistant to the effects of hydration in drying and firing rammed bottoms. In regard to firing properties they are superior to mixtures with fusible binders. Thoroughly rammed mixtures with a sufficient amount of fines produce a highly resistant bottom in electric steel-melting furnaces. A gradual sintering of the rammed mixtures occurs under the action of the migration of liquid metals at high temperatures in service. It is, therefore, recommended to base the production of magnesite ramming mixtures for electric steelmelting furnaces on dead burned magnesite with an alcohol sulfite binder. The use of the above mixtures in the industry would facilitate ramming and repair work in comparison to mixtures to which carbon binders have been added.
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