Automatic closing method and device of red mud disposal drainage shaft

Abstract

The invention discloses an automatic closing method and a device of a red mud disposal drainage shaft. A water drain pipe is welded on the pipe wall of a drainage shaft, the other end of the water drain pipe is welded with a base plate with holes, and the holes on the base plate are superposed with holes of the water drain pipe; a gate groove and a stop strip are arranged on the base plate, a floating damper with an air bag and hollow holes is inserted in the gate groove, and the hollow hole on the damper is hung on the stop strip on the base plate; the holes on the base plate are totally exposed in the hollow hole when the base plate is in the initial position; when water level is higher than the position of the air bag, the air bag floats, the solid body part of the lower part of the damper gradually covers the holes on the base plate till the lower bottom of the hollow hole is covered totally by the stop strip, and then the water drain pipe is totally closed. The method utilizes the floating force of the air bag on the damper in water to realize the effect of automatic closing of the water drain port of the drainage shaft along with the rise of red mud surface or water surface,so that no need of manual control and reduction of labor intensity of workers are achieved, and the shortcomings of the prior art are overcome.

Description

technical field [0001] The invention relates to a method and a device for automatically closing a drainage shaft of a red mud storage yard during alumina production, and belongs to the technical field of drainage shafts of a red mud storage yard. Background technique [0002] Red mud is the waste residue produced in alumina production. Except for a small amount that can be comprehensively utilized, each alumina plant needs to build a special red mud storage yard to stack red mud. [0003] There are generally two ways to send red mud from the factory to the storage yard: one is to send the filtered cake of red mud to the storage yard by car; the other is to transport it to the storage yard in the form of red mud slurry after adding water. In the latter method, according to the difference in moisture content of the red mud slurry, it is divided into two processes: wet method and dry method. Regardless of the wet process or the dry process, the drainage shaft is an important p...

AI Technical Summary

Problems solved by technology

With this method, due to the long corridor at the bottom of the warehouse and poor working conditions, the daily management of the storage yard is very troublesome

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