CONTAINER FOR DIRECT REDUCTION IRON (DRI) Russian patent published in 2021 - IPC F27D1/16 

FIELD: metallurgy.

SUBSTANCE: invention relates to a container for direct reduced iron (DRI). The container comprises at least an upper zone formed by a first side wall having a substantially cylindrical tubular shape and a discharge zone located below said upper zone and formed by a second side wall having a substantially frusto-conical shape tapering towards the lower outlet. The inner surface of the second side wall is at least partially lined with an inner lining containing at least the first layer of a composite ceramic material formed from a mixture containing alumina in the form of corundum Al₂O₃ in an amount from 40 to 60 wt.%, zirconium oxide in the form of zirconium dioxide ZrO₂ in an amount from 25 to 40 wt.% and silicon oxide SiO₂ in an amount from 10 to 20 wt.%, the surface of the inner lining has a surface hardness greater than or equal to 8.5 units on the Mohs scale to reduce the coefficient of friction of the second side wall and increase the ability of DRI to slide in the direction of the specified discharge hole. Disclosed is the use of a container as a reactor for the production of DRI, a bunker or storage or other container for storing or supplying DRI to a melting furnace or briquetting machine.

EFFECT: invention provides the possibility to restrict heat exchange between the hot DRI inside the tank and the external environment, facilitating the downward movement of DRI along the walls of the unloading zone to increase the degree of heating of DRI at the exit from the iron tank (DRI) without the use of mechanical means that promote or improve the downward movement of DRI, maintaining the wall temperature is lower than the temperature range at which it is necessary to use the forced cooling system, and a decrease in the height of the unloading zone and, accordingly, the total height of the tank due to a decrease in the wall friction angle and an increase in the wall taper in the unloading area with the achievement of a given productivity.

10 cl, 3 dwg