Method for disposing high-nickel copper-containing solid waste by oxygen-enriched side-blown furnace

Abstract

The application discloses a method for treating high-nickel copper-containing solid waste in an oxygen-enriched side-blown furnace, and belongs to the technical field of solid waste treatment. The method comprises the following steps: crushing the solid waste to make the particle diameter of the solid waste less than 1.5-3.5 cm, crushing at least one of quartz stone or mica to make the particle diameter of the crushed quartz stone or mica less than 1-2.5 cm, obtaining a flux, alternately stacking the solid waste particles and the flux in a furnace, and preheating the furnace; adding a fluxing agent into the furnace, adding a sulfidizing agent and a deoxidizing agent, and heating and melting raw materials, so that nickel and copper react to become low nickel matte and low copper matte, and then the copper matte is discharged through a copper port; adding a solid reducing agent or a gaseous reducing agent into the furnace, heating the furnace, and performing a first reduction reaction on oxides in the solid waste. The application can avoid excessive generation of copper and nickel oxides in the smelting process by performing reduction reactions in batches, can avoid over-oxidation by reasonably reducing the slag temperature, and can control a suitable oxidation atmosphere to reduce the copper and nickel contents in the slag.

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