METHOD TO PRODUCE WUSTITE PRODUCT FOR FLUSHING OF BLAST FURNACE HEARTH Russian patent published in 2014 - IPC C21B3/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to ferrous metallurgy, namely, to production of a highly protoxidic product used for flushing of walls and hearths of a blast furnace. The method includes annealing of a charge from bulk concentrate of annealed siderite with a carbon-containing material in a rotary furnace at the temperature of 1250-1350°C in a restoration atmosphere, which is created by means of incomplete burning of a carbon-containing material due to limited access of oxygen with specific flow of natural gas 45.0-55.0 Nm³/t of the charge and efficiency of the furnace equal to 19.0-25.0 kg/hour with 1 m³ of furnace volume. The bulk concentrate of annealed siderite and carbon-containing material within the charge are mixed at the components ratio of 5:1 with size of 10-40 mm and 0-10 mm, accordingly. The carbon-containing material is coke fines, and/or coal, and/or anthracite, and/or crushed graphitised or carbon materials.

EFFECT: usage of the invention provides for production of a wustite product of increased strength with content of FeO>40%.

2 cl, 1 dwg, 6 tbl, 1 ex