Copper smelting method capable of reducing dust content of flue gas by using molten bath of isa furnace

Abstract

The invention discloses a copper smelting method capable of reducing dust content of flue gas by using a molten bath of an isa furnace. The method comprises the following steps: granulating a raw material, controlling the water content of granules at 8-9%, and feeding the granules, the water content of which is 8-9%, into the isa furnace to be smelted through a material guide pipe, wherein the material guide pipe enters from the top of a furnace body of the isa furnace, a discharge port of the material guide pipe is located in the middle of the furnace body, and a feed inlet of the material guide pipe is larger than the discharge port; inserting a spray gun into the isa furnace, blowing oxygen-enriched air into the molten bath in the isa furnace in a forced manner through the spray gun, and controlling the flow of the spray gun at 24000-25000 Nm<3> / h, wherein the spray gun is inserted to a position, 0.3-0.4 m, from the bottom end of the spray gun to a top opening of the furnace body ofthe isa furnace; and controlling the temperature of a melt in the isa furnace at 1140-1180 DEG C, wherein in the whole process, flue gas enters into an external flue gas system through a flue gas exhausting pipeline connected to the top of the furnace body of the isa furnace. Preferably, the material guide pipe comprises a feeding hopper and a discharging pipe, and the discharge port of the discharging pipe is located in the middle of the furnace body. The method has the advantage of being low in dust content of flue gas in a copper smelting process.

Description

technical field [0001] The invention relates to the technical field of smelting in an Isa furnace melting pool, in particular to a copper smelting method in an Isa furnace melting pool capable of reducing the dust content of flue gas. Background technique [0002] The Essar copper smelting method is a top-blown submerged molten pool smelting method. Oxygen-enriched air is forced into the molten pool through a spray gun, and the iron and sulfur elements in the oxide material release heat for smelting to produce high-grade matte copper. The hearth of the Aisa furnace is 13.656m high, and the molten pool area is below 2.1m. The feeding port is set on the top of the Aisa furnace. In the pool, it takes about 1.14s. It takes a long time to run in the Isa furnace, and because the reaction in the furnace is accompanied by the desulfurization process, a large amount of high-temperature sulfur dioxide flue gas will be generated. The flue gas will take away part of the powdery material...

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to provide a copper smelting method in the Isa furnace molten pool that can reduce the dust content of the flue gas, which is used to solve the technical problem of the high dust content of the flue gas in the Isa copper smelting process in the prior art

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