Aluminum electrolytic cleaning aluminum oxide overall feed regulation valve

Abstract

The invention discloses an aluminum electrolytic cleaning aluminum oxide overall feed regulation valve. An overall feed device comprises a cover plate, a compaction handle, a box body, a cover plate seat, a regulation plate, boiling cloth, an air chamber, a regulation handle, a regulation locking handle, a feed hole and a boiling material box, wherein the regulation plate is arranged on a side wall of the boiling material box opposite to the box body; the regulation handle and the regulation locking handle are connected outside the boiling box and the box body; the regulation handle and the regulation plate are connected through a connection shaft and can synchronously rotate for 0-90 degrees; and the regulation plate and the regulation handle are locked and fixed through the regulation locking handle at each point in the range of 0-90 degrees. By adopting the technical scheme, after the opening of the valve is regulated, the valve can be quickly locked, and the change of the opening / closing size of the valve is avoided so as to avoid influence of unstable feed amount on the grade change of the fluorine-containing aluminum oxide and to keep balanced supply of aluminum oxide; and moreover, the influence on the electrolysis process is avoided, and the quality and economic valve are improved. The valve disclosed by the invention has the advantages of small volume, low manufacturing cost, easiness in mounting and low maintenance load.

Description

technical field [0001] The invention relates to a process device technology for electrolytic aluminum production, in particular to an aluminum electrolytic purification alumina total feeding regulating valve. Background technique [0002] The basic and guarantee link of electrolysis production is the key link of adsorbent control and operation management. The continuous equilibrium of adsorbent and the investment in purification adsorption reaction are an important link and a difficult problem. For a long time, it has been around the optimization and operation management of electrolysis production. The production raw material is put into the electrolytic cell - the fluoride salt is recovered in the cut-off alumina, and the difference in its content and uniformity has a great influence on the molecular ratio and temperature control of the electrolysis. In addition, due to the increase in the difference of its physical properties, it affects the normal alumina concentratio...

AI Technical Summary

Problems solved by technology

[0003] Problems existing in the existing feeding valve: the existing 350KA and 200KA series of our company adopt the pipeline method to purify the reactor and the pulse bag filter, and use the dry purification technology to treat the fluorine-containing flue gas discharged from the electrolytic cell. The total feeding is from the design At the beginning, the gate valve was used to adjust the total feeding in the fresh warehouse, and the fresh warehouse outlet was purified in the workshop as the starting point of feeding. The feeding flow rate of the fresh warehouse outlet was controlled by a DN300 gate valve. The 300 chute enters the feeding hole of the boiling slag removal box, boils through the air chamber, enters the chute from the overflow hole, and then enters the dust collector. However, the labor intensity of operating this valve is high, and it is not suitable for frequent operation. The total feeding control is extensive, because the total feeding is affected by many Influencing factors, such as the high and low level of the fresh warehouse material, the size of the negative pressure of the system, the particle size and burning degree of fresh alumina, and the operator's sense of responsibility, so sometimes the gate valve is opened large, and the material volume is not necessarily large, and the opening is small. The amount of material is not necessarily small, and because of the need to control the amount of material, the opening of the slide valve is very small, the valve port is easily blocked by impurities, and the operator must wait at the feeding point every time he adjusts the total feeding. For more than half an hour, the difficulty in controlling the total flow rate led to uneven fluorine content in alumina and fluctuations in grade, which affected the electrolysis process

Images