Method for conveying dry red mud

Abstract

The invention discloses a method for conveying dry red mud. The method arranges an intermediate staying tank between the last settling tank of a high-efficient and deep-cone red mud washing and settling tank for producing red mud slurry and a red mud shearing pump for conveying the red mud slurry, the underflow red mud slurry of the last settling tank is firstly conveyed into the intermediate staying tank, then is discharged out from the bottom part of the intermediate staying tank, and then is delivered into a high-pressure red mud pump after being pressurized in the red mud shearing pump, and finally, is conveyed to a red mud disposal site through the high-pressure red mud pump. The method can enable the flow of the material entering into the high-pressure red mud pump and the pressure of the high pressure red mud pump to be stable through adding an intermediate staying tank with mechanical stirring function, can facilitate the stable operation of the high pressure pump, and can also discharge waste acid used in the production into the tank to adjust the pH value of the wastewater from the red mud, thereby eliminating the waste acid pollution to human bodies and the environment.

Description

Red mud dry transport method Technical field: The invention relates to a method for conveying red mud, especially a method for dry conveying red mud. Background technique: In alumina production, the red mud dry transportation is that the bottom of the last settling tank of the high-efficiency deep cone red mud washing and settling tank flows through the red mud shearing pump and directly feeds the high-pressure mud pump, and the high-pressure mud pump then transfers the red mud (solid Containing 48-52%) directly into the red mud stockpile, and then the red mud slurry is turned over and dammed for storage. Since the underflow (red mud) is directly fed into the high-pressure mud pump through the red mud shear pump, there is no buffer tank in the middle, so that the feed flow and pressure are unstable, and the flow and pressure of the high-pressure mud pump also fluctuate. Small size is not conducive to the operation of high-pressure mud pumps, resulting in unstable producti...

AI Technical Summary

Problems solved by technology

Since the underflow (red mud slurry) is directly fed into the high-pressure mud pump through the red mud shear pump, there is no buffer tank in the middle, which makes the feed flow and pressure unstable, and the flow and pressure of the high-pressure mud pump also fluctuate. Small size, which is not conducive to the operation of high-pressure mud pumps, resulting in unstable production and operation; in addition, the waste acid used in production cannot be treated and is directly discharged, which not only brings harm to people but also pollutes the environment

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