Air exhausting device and method of discharged aluminum

Abstract

The invention relates to an air exhausting device and method of a discharged aluminum ladle, and is mainly used in the problem of air exhausting methods of the discharged aluminum ladle in electrolytic aluminum smelting industry. The structure of the air exhausting device is as follows: the ladle and ladle air exhausting outlets are connected with a compressed air pipe through an air hose, the compressed air pipe is arranged in an air exhausting pipe on the upper part of an electrolytic tank, an electrolytic tank gas collecting hood is arranged at the bottom of the air exhausting pipe, and the compressed air pipe is provided with nozzles. The air exhausting device has the advantages that: when aluminum in the electrolytic tank is discharged through the device, compressed air of the discharged aluminum ladle is discharged into the upper structure of the electrolytic tank, namely an upper part flue of the electrolytic tank, by preset of hole size and direction of a pipe in the flue, the compressed air is discharged according to certain direction, and the purpose of cleaning up dust stratification in the upper part flue and guiding the furnace internal air flow can be achieved.

Description

technical field [0001] The invention relates to an aluminum ladle exhaust device and method, which is mainly applied to the problem of the exhaust method of the aluminum ladle in the electrolytic aluminum smelting industry. Background technique [0002] The main pollutants in electrolytic aluminum plants are fluoride. In the electrolytic production process, the main emission forms of fluoride include organized emissions from chimneys and unorganized emissions from electrolysis workshops. Among them, the unorganized emissions from electrolysis workshops account for about 100% of the gaseous fluorine in the whole plant. about 80% of chemical emissions. In the fugitive emissions of the electrolysis workshop, the discharge of the electrolytic cell during normal production only accounts for about 30% of the total fugitive emissions, while the remaining 70% of the fugitive emissions are generated in the electrolytic cell pole changing, aluminum output, and generated during the co...

AI Technical Summary

Problems solved by technology

Although this method can partially reduce the pollution of fluoride brought out by the compressed air during aluminum tapping, it will also cause the following problems: (1) The high-speed compressed air passing into the furnace will generate secondary dust, which will increase the covering material entering the electrolytic cell The upper flue will block the flue, which will affect the gas collection of the electrolytic cell; (2) The secondary dust will also reduce the sealing efficiency of the electrolytic cell and increase the leakage of the electrolytic cell; (3) The furnace temperature of the electrolytic cell is high, which will affect the inlet The rubber hose in it is damaged, which affects the use effect

Images