GAS MODE CONTROL METHOD OF CONVERSION IN CONVERTER FOR NON-FERROUS METALLURGY Russian patent published in 2007 - IPC C22B15/06 

FIELD: automatic control systems for conversion processes in non-ferrous metallurgy, possibly optimization of gas mode of converters at processing sulfide ores and concentrates.

SUBSTANCE: method comprises steps of calculating with use of mathematical model sulfur dioxide content in gases of each converter depending upon controlled parameters; monitoring flow rate of blast fed to converter, detecting gas temperature and evacuation degree in gas tract of converter and stabilizing evacuation value due to changing revolution number of exhaust fans; cyclically measuring content of sulfur dioxide in gas tract of converter; comparing it with calculated value; correcting mathematical model; according to change of sulfur dioxide content depending upon change of evacuation degree in gas tract determining optimal value of evacuation degree in gas tract and sustaining said value. Invention provides increased (from 3 - 5% till 5 - 7%) content of sulfur dioxide in gases fed to process for producing sulfuric acid.

EFFECT: increased content of sulfur dioxide in gases fed for producing sulfuric acid, lowered exhaust of converter gases to shop atmosphere due to trapping and transporting them.

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