DEVICE FOR CALCINING SULFIDE ORES Russian patent published in 2022 - IPC C22B1/04 F27B7/14 

FIELD: ore calcining.

SUBSTANCE: invention relates to devices for calcining sulfide ore. The device for calcining sulfide ores, which is a drum rotating furnace with drying, heating and holding zones at a given temperature, contains a lined housing, a chamber for unloading the calcined ore, at the end of which an air heater is installed, to the nozzle of which hot air is supplied from a recuperator mounted on the refrigerator housing using a high-temperature fan. A gas supply nozzle is installed on the end surface of the air heater. In the center of the air heater, a burner is inserted into the working space of the lined furnace housing, to the nozzle of which hot air is supplied from a recuperator mounted on the refrigerator housing using a high-temperature fan. A gas supply nozzle is installed at the end of the burner. To regulate the stay period of the ore in each zone along the length of the furnace, folding blades are installed at predetermined angles of inclination relative to the axis of the furnace.

EFFECT: invention provides full controllability of the temperature field inside the furnace and the stay period of the ore at a given temperature, as well as maximum loading of the furnace without affecting the results of oxidative calcining.

2 cl, 2 dwg, 1 ex