Device and method for continuously removing copper from liquid crude lead

Abstract

The invention relates to a device and a method for removing copper in crude lead pyro-refining in nonferrous metallurgy field, and in particular relates to a device and a method for continuously removing copper from liquid crude lead. The device comprises a pot body and a smoke hood which is covered on the pot body, wherein a stirrer, the stirring paddle of which extends to the liquid lead in the pot body, is fixedly arranged on the smoke hood; the pot body is divided into a stirring reaction region and a cooling liguation region by a baffle plate; the liquid lead and copper dross overflow to the upper part of the cooling liguation region from the stirring reaction region through the upper side of the baffle plate; a charging hole is arranged at the end part of the smoke hood on the stirring reaction region; a drossing hole and a lead discharging hole are arranged at the end part of the cooling liguation region; a smoke outlet is arranged at the end part of the smoke hood above the cooling liguation region; dross stirrers for stirring the copper dross floating on the liquid lead are fixedly arranged on the two side surfaces of the cooling liguation region; cooling water tubes for cooling the liquid lead are welded on the two sides of the pot; a siphon lead discharging tube is arranged on the pot side at the lead discharging hole; and the lower hole of the siphon lead discharging tube extends to the bottom of the pot body. According to the device and the method provided by the invention, energy is saved, environment-friendly effect is good, recovery rate of lead is high, automation degree is high, and labor intensity is low.

Description

technical field [0001] The invention relates to a device and method for removing copper in crude lead fire refining in the field of nonferrous smelting, in particular to a device and method for continuously removing copper from liquid crude lead. Background technique [0002] For the lead smelting industry, crude lead refining generally adopts two methods: fire refining and electrolytic refining. No matter which method is used, crude lead needs to go through the process of copper removal by fire. At present, copper removal generally adopts two methods: adding sulfur to remove copper and melting to remove copper, and both methods can adopt two modes of operation: discontinuous and continuous. Intermittent operations are generally completed in the copper removal pot, and continuous operations are generally completed in the reverberatory furnace type copper removal furnace. [0003] At present, domestic manufacturers generally use electrolytic refining for crude lead refining,...

AI Technical Summary

Problems solved by technology

The continuous copper removal operation adopts the reverberatory furnace type. The crude lead continuous copper removal process has certain advantages, which improves the direct yield of lead, can realize the automation of operation, and improves the working conditions. However, the existing continuous copper removal process All adopt the reverberatory furnace type copper removal furnace. On the one hand, in order to ensure that the high-temperature matte smelting in the molten pool is fully completed, a large amount of lead liquid is heated to a higher temperature at the same time, which consumes a lot of heat sources. On the other hand, it is necessary to cool the high-temperature lead liquid to precipitate copper. Maintaining a high temperature gradient from top to bottom in the molten pool still has the disadvantages of high energy consumption and waste of energy

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