Fuming furnace and slag flushing device thereof

Abstract

The invention provides a fuming furnace and a slag flushing device thereof. The slag flushing device comprises a slag flushing tank, a slag flushing chute used for introducing furnace slag in a fuming furnace body into the slag flushing tank, a slag flushing duckbilled pipe capable of spraying high-speed water flow used for carrying out water quenching on the furnace slag, a slag discharging machine used for discharging the furnace slag in the slag flushing tank after water quenching and an enrichment cover arranged above the slag flushing tank, wherein an input end of the slag discharging machine is arranged in the slag flushing tank, an output end of the slag discharging machine is inclined upward and extends out from one side of the slag flushing tank; and a chimney used for discharging steam and harmful gas in the slag flushing tank to the upper air is arranged at the top end of the enrichment cover. The slag flushing device has the advantages that a large amount of steam and part of harmful gas which are produced during pelletizing and cooling of the furnace slag can be collected by the enrichment cover and is discharged out by virtue of the chimney, so that a furnace slag water quenching treatment operating environment of the fuming furnace is improved, and harms to human health is reduced; and even if copper matter content of the furnace slag in the fuming furnace is too high, explosion due to rapid heat absorption and heat release during pelletizing and cooling when the furnace slag is discharged happens in the enrichment cover, so that a potential safety hazard can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of lead smelting, in particular to a fuming furnace and a slag flushing device thereof. Background technique [0002] The slag produced by the reduction blast furnace of lead smelting contains valuable metals such as lead and zinc, and is generally processed and recovered by fuming furnace. The blowing process of the fuming furnace to the lead-zinc slag is essentially a reduction and volatilization process, so that the slag produced by the reduction blast furnace enters the fuming furnace, and at the same time blows the mixture of pulverized coal (or other reducing agents) and air into the fuming furnace. The pulverized coal combustion produces a large amount of heat and carbon monoxide gas, which keeps the furnace at a relatively high temperature and a certain reducing atmosphere, so that the lead and zinc in the slag are reduced from their oxides to metal vapor and volatilized, and then to the upper part o...

AI Technical Summary

Problems solved by technology

However, when the slag of the fuming furnace is released through the slag port, the temperature is about 1250°C, and the whole process of slag discharge is open, and the granulation and cooling of the slag during the slag discharge process produces a large amount of water vapor and some harmful gases (trace dusty flue gas etc.) will be discharged disorderly, resulting in a poor operating environment and endangering human health

[0004] In addition, if the slag of the fuming furnace is too high in matte, the granulation and cooling of the slag during the slag discharge process will rapidly absorb and release heat and cause an explosion, resulting in cross-flow of sewage and overflow of water-quenched slag, which increases the labor intensity of the staff. Not conducive to safe production

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