Energy-saving insulation external crucible and application method thereof

Abstract

The invention relates to an energy-saving insulation external crucible. The energy-saving insulation external crucible comprises an external crucible body and an insulation cover furnace top; the insulation cover furnace top covers the top of the external crucible body; a melting pool is formed in the external crucible body; the insulation cover furnace top is provided with a coal spraying nozzle for spraying pulverized coals and a slag inlet for injecting reducing furnace slag in the external crucible body; the external crucible body is provided with a matte placing siphon port for discharging mattes and a slag discharge port for discharging slag; the coal spraying nozzle, the slag inlet, the matte placing siphon port and the slag discharge port all communicate with the melting pool; and the coal spraying nozzle is connected with a coal outlet of a coal mill. The invention further provides an application method; and the application method comprises the following steps: the coal spraying nozzle is connected with the coal outlet of the coal mill; the coal mill is started; the pulverized coals are sprayed into the melting pool through the coal spraying nozzle; and the slag and the mattes are precipitated and separated in the melting pool. The energy-saving insulation external crucible has the following beneficial effects: a coal spraying insulation mode is adopted; and the mode is low in coal consumption and excellent in insulation effect, achieves no insulation effect on the slag, achieves excellent precipitation and separation effect of the slag and the mattes, and improves the matte recovery rate.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to an energy-saving heat preservation front bed and a method for using the same. Background technique [0002] In the domestic non-ferrous metal renewable resources smelting industry, smelting enterprises that use oxygen-enriched side-blown reduction furnaces to smelt lead, copper or lead-copper mixing, in order to make the slag precipitate and separate effectively recover matte (that is, copper matte, lead matte, iron matte Mixed molten body) to improve the recovery rate of valuable metals. In the prior art, some small enterprises generally adopt sedimentation pot precipitation separation, or adopt open front bed sedimentation separation without heat preservation measures. The precipitation time is short in the above two ways It is easy to freeze, the precipitation yield is low, the effect is poor, the labor intensity of the workers is high, and the working environment is po...

AI Technical Summary

Problems solved by technology

[0002] In the domestic non-ferrous metal renewable resources smelting industry, smelting enterprises that use oxygen-enriched side-blown reduction furnaces to smelt lead, copper or lead-copper mixing, in order to make the slag precipitate and separate effectively recover matte (that is, copper matte, lead matte, iron matte Mixed molten body) to improve the recovery rate of valuable metals. In the prior art, some small enterprises generally adopt sedimentation pot precipitation separation, or adopt open front bed sedimentation separation without heat preservation measures. The precipitation time is short in the above two ways It is easy to freeze, the precipitation yield is low, the effect is poor, the labor intensity of the workers is high, and the working environment is poor. In the process of crude lead smelting, some large-scale enterprises generally use the electric heating front bed as the fuming furnace to recover zinc oxide. Precipitation and separation can only be used for heat preservation and storage of molten slag to a certain amount, and then the molten slag is sent to the fuming furnace for blowing to recover zinc oxide. In this way, the electric heating front bed has large investment, high power consumption, no energy saving and due to the stirring of the arc Can't play the role of precipitation separation

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