METHOD OF PRODUCING ALUMINA CEMENT AND MANGANESE-ALUMINIUM ALLOY (VERSIONS) Russian patent published in 2011 - IPC C04B7/32 C22C33/04 

FIELD: chemistry.

SUBSTANCE: invention relates to production of alumina cement. In one version of the method of producing alumina cement and an alloy, involving preparation of mixture components, mixing said components, loading into an electric furnace, melting and outlet of the melt from the furnace, pouring into moulds, cooling and grinding, the mixture components used are ore with manganese content of 40-60 wt %, limestone with manganese content of 6-15 wt % and lime, outlet is carried out into a bucket on a reducing agent - aluminium; after holding for 7-10 minutes, said pouring is carried out from the bottom of the bucket by first draining the molten manganese-aluminium alloy and then the rest of the melt, with the given ratio of components. In another version of the method of producing alumina cement and an alloy, involving preparation of mixture components, mixing said components, loading into an electric furnace, melting and outlet of the melt through two separate streams into buckets, cooling and grinding to obtain two products - alumina cement and an alloy, the mixture components used are ore with manganese content of 40-60 wt %, limestone with manganese content of 6-15 wt %, lime, and a reducing agent - aluminium; loading is carried out in two steps - first said ore, limestone, lime and aluminium metal in amount of 30-40% of total content thereof, and after melting - the rest of the amount of aluminium; outlet of the melt is carried out after 15-30 minutes, with given ratio of components.

EFFECT: possibility of using limestone with high content of impurities, obtaining alumina cement with low heat release and stable strength in 28 days of age, non-waste technology which enables to obtain a manganese-containing alloy into which up to 90-95% manganese is transferred.

2 cl, 3 ex