METALLURGICAL RAW MATERIAL FIRING PROCESS CONTROL METHOD IN FLUIDIZED-BED FURNACE AND METHOD FOR ARRESTING SUCH FURNACE Russian patent published in 2007 - IPC F27B15/18 C22B1/10

Abstract RU 2293936 C2

FIELD: non-ferrous metallurgy.

SUBSTANCE: method comprises steps of feeding under hearth of furnace (gaseous) nitrogen; setting firing temperature for predetermined composition of charge; stabilizing designed values of charge flow rate in fluidized bed, air flow rate or air pressure under hearth of furnace necessary for normal operation of fluidized-bed furnace; then measuring error of calcine temperature in fluidized bed relative to preset temperature value and simultaneously changing flow rates of air and nitrogen supplied under hearth of furnace for completely suppressing error of measured temperature while sustaining preset pressure of gas-air mixture under hearth of furnace. Furnace is arrested due to lowering preset temperature of calcine in fluidized bed according to condition of completely interrupting firing process of all fractions of charge in fluidized bed.

EFFECT: enhanced operational reliability of all units of furnace.

1 dwg

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RU 2 293 936 C2

Authors

Salikhov Zufar Garifullinovich

Salikhov Marat Zufarovich

Dates

2007-02-20—Published

2005-02-22—Filed