Continuous blowing process for high-grade matte

Abstract

The invention discloses a continuous blowing process for high-grade matte. The continuous blowing process comprises the following steps that S1, hot matte is periodically conveyed into a blowing furnace in a fixed quantity of 24 tons per hour through a connecting chute; S2, a compressed air valve and an oxygen valve are opened, air and oxygen are supplied into the furnace, and then a furnace bodyis transferred to a blowing position for blowing; S3, in the blowing process, blowing slag, matte and blister copper form a three-phase structure, and the temperature of a matte layer located in a reaction zone is maintained at 1200 + / -50 DEG C; and the liquid level in the furnace is determined by measuring the thicknesses of a blowing slag layer, the matte layer and a blister copper layer, so that blowing slag is discharged from a slag discharge port in time, and copper is discharged from a copper outlet when the liquid level of the blister copper layer reaches an oxygen lance port. Accordingto the continuous blowing process for the high-grade matte, the matte with the grade being 76% - 78% is selected as a blowing raw material, pure air blowing is adopted, 24 tons of the hot matte is fed per hour, it is guaranteed that the bottom-blowing continuous blowing furnace carries out total-heat material blowing, no intermediate cold material is added to control melt in the furnace, and continuous blowing production of the hot matte is achieved.

Description

technical field [0001] The invention belongs to the technical field of blister copper smelting, and in particular relates to a high-grade matte continuous blowing process. Background technique [0002] In the traditional production process, during the blowing process of hot matte in the continuous blowing furnace, due to the low grade of hot matte (the grade of matte is controlled at 68-70%), the heat energy generated cannot be balanced, and intermediate materials need to be added to the furnace to carry out the process. Cool down to achieve thermal equilibrium. This requires the matte copper to be released from the smelting furnace in the early stage for slow cooling and to accumulate a large amount of intermediate material. During production, it is transported to the furnace by a belt to control the temperature. During the slow cooling process, vehicle transportation and crusher crushing are required, and necessary production equipment such as transportation belts and sil...

AI Technical Summary

Problems solved by technology

During production, it is transported to the furnace by a belt to control the temperature. During the slow cooling process, vehicle transportation and crusher crushing are required, and necessary production equipment such as transportation belts and silos need to be specially added, which indirectly causes production costs. A large amount of intermediate materials will also cause a backlog of funds and affect the operation of the company

[0003] Secondly, during the blowing process, the oxygen lance is in the blister copper layer. Due to the complexity of the furnace materials, it is difficult to control the heat balance in the furnace. The melt level in the furnace may be high or low, and it is easy to cause oxygen lance and oxygen lance bricks Burning loss, affecting the service life of the furnace body

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