A high-grade matte continuous blowing process

Abstract

The invention discloses a high-grade matte continuous blowing process, which includes the following steps: Step S1: regularly send hot matte to a blowing furnace at a rate of 24 tons / hour through a connecting chute; Step S2: open a compressed air valve and oxygen valve, supply air and oxygen to the furnace, and then transfer the furnace body to the blowing position for blowing; Step S3: During the blowing process, the blowing slag, matte and blister copper form a three-phase structure, which is located in the reaction The temperature of the matte layer in the area should be maintained at 1200 °C ± 50; by measuring the thickness of the blowing slag layer, the matte layer and the blister copper layer, the liquid level in the furnace is determined, so that the blowing slag can be released from the slag discharge port in time. When the liquid level of the copper layer reaches the mouth of the oxygen gun, it is discharged from the copper outlet; in the present invention, matte with a grade of 76-78% is selected as the raw material for blowing, and pure air is used for blowing, and the hot matte is smelted every hour. 24 tons, the bottom blowing continuous blowing furnace is guaranteed to blow with full hot material, and no intermediate cold material is added to control the melt in the furnace, which realizes the continuous blowing production of hot matte.

Description

technical field [0001] The invention belongs to the technical field of blister copper smelting, in particular to a continuous blowing process for high-grade matte copper. Background technique [0002] In the traditional production process, in the process of hot matte blowing in the continuous blowing furnace, due to the low grade of hot matte (the matte grade 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. Cooling treatment to achieve thermal equilibrium. This requires slow cooling of the exothermic matte outside the smelting furnace in the early stage, and a large amount of intermediate material is accumulated. During production, the temperature is controlled by conveying the belt to the furnace. During the slow cooling process, vehicle transportation and crusher crushing are required, and necessary production equipment such as transportation belts and silos need to...

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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