Method for regulating and controlling flue gas temperature of flue and negative pressure of hearth in reduction stage of anode furnace

Abstract

The invention discloses a method for regulating and controlling flue gas temperature of a flue and negative pressure of a hearth in a reduction stage of an anode furnace, and belongs to the technical field of copper smelting. The method comprises a rotary anode furnace body, a Z-shaped flue, a secondary combustion chamber and a spraying device. The method comprises the following steps of (1) connecting the outlet end of the rotary anode furnace body with the secondary combustion chamber through the Z-shaped flue, and reducing the flue gas temperature at the outlet of the secondary combustion chamber to be within 800 DEG C; (2) connecting the spraying device to the outlet end of the secondary combustion chamber, and spraying atomized cooling water to the top of the spraying device; and (3) calculating the amount of atomized cooling water sprayed by the top of the spraying device. According to the method, the investment, maintenance and human costs of equipment and facilities are saved, the continuous service cycle of high-temperature flue gas collecting equipment of the furnace body is prolonged, clean production is realized, the furnace is not stopped, the production is not influenced, the flue gas temperature in the reduction stage of the anode furnace is controlled within a reasonable range of production requirements, and the overall regulation and control of the negative pressure of the furnace body and the hearth are not influenced.

Description

technical field [0001] The invention relates to the technical field of copper smelting, in particular to a method for regulating flue gas temperature and furnace negative pressure in the reduction stage of an anode furnace. Background technique [0002] With the continuous improvement of the production capacity of copper smelting enterprises, most copper smelting enterprises currently use rotary anode furnaces for anode copper refining production in the refining process. In the reduction stage of the anode furnace, natural gas, pulverized coal or heavy oil and other reducing agents need to be introduced to carry out the reduction operation. During the reduction period, the temperature of the flue gas in the furnace generally reaches 1300-1400 °C. In the face of high-temperature flue gas, different manufacturers adopt different methods. Flue gas cooling and dust reduction methods are used for treatment. Among them, some enterprises use the "secondary combustion chamber + wast...

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Problems solved by technology

In the reduction stage of the anode furnace, natural gas, pulverized coal or heavy oil and other reducing agents need to be introduced to carry out the reduction operation. During the reduction period, the temperature of the flue gas in the furnace generally reaches 1300-1400 ° C. In the face of high-temperature flue gas, different manufacturers adopt different methods. Flue gas cooling and dust reduction methods are used for treatment. Among them, some enterprises use the "secondary combustion chamber + waste heat boiler" cooling and dust collection method for flue gas cooling and dust collection. However, production practice has proved that this method has the following problems: (1 ) The waste heat boiler occupies a large area and has a relatively complex structure. The maintenance and repair workload of the boiler rapping facilities, steam drum, and water wall is relatively large, and the ash accumulation in the furnace of the boiler radiation part must be cleaned regularly, which consumes a lot of manpower and material resources. High maintenance and operation costs

(2) The waste heat boiler system needs to carry out regular maintenance work on the boiler body for a certain period of time, and the maintenance time is generally 1-2 days. If the anode furnace production plan density is high, and it coincides with the boiler body maintenance, it will affect the overall production of the anode furnace The planned operation of the operation will affect the overall production capacity of the anode furnace

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