A method for optimizing control of oxygen concentration in a continuous blowing system starting-up process

Abstract

The present application relates to non-ferrous smelting technical field, specifically to a kind of rich oxygen concentration optimization control method of continuous blowing system starting process, before stove baking of converter, crude copper is preloaded into converter, and initial molten pool foundation is formed;Dry smelting slag is laid on crude copper, and protective layer is formed;Converter is baked according to preset baking curve, and preloaded crude copper and smelting slag are gradually melted to form molten pool;In the process of stove baking, smelting slag is added to the furnace in batches;When molten pool liquid level reaches preset starting liquid level height, process gas is supplied into converter at first rich oxygen concentration lower than normal production, and starting blowing is started;After blowing preset time in low-oxygen starting stage, rich oxygen concentration is gradually increased from first rich oxygen concentration to second rich oxygen concentration according to furnace temperature and slag layer formation condition.The present application greatly shortens the pool forming period, while ensuring uniform molten pool temperature distribution.

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