System device for ensuring continuous, stable and uniform feeding of fluorine carrying aluminum oxide

Abstract

The invention discloses a system device for ensuring the continuous, stable and uniform feeding of fluorine carrying aluminum oxide. The device comprises a fresh aluminum oxide chamber, an impeller feeding machine, a vibration sieve, an impurity channel, a horizontal chute, a chute connecting member and a purifying body, the purifying body and the horizontal chute are connected by the chute connecting member, and the chute connecting member is provided with a material level switch and a fixed hole feeding device. The device has the advantages that a slag removing manner is optimized, a manualslag removing manner which costs time and strength is replaced, a slag removing technology without material interruption is achieved, unstable factors of technological controlling caused by material interruption slag removing are removed, a monitoring means is optimized, a material moving state is monitored on an upper computer, concentrated management is convenient, a problem is discovered in advance, material gathering and blocking are solved from the source, and the problem of material interruption in aluminum oxide purifying and conveying is solved.

Description

technical field [0001] The invention relates to the technical field of alumina supply, in particular to a system device for ensuring continuous, stable and uniform feeding of fluorine-carrying alumina. Background technique [0002] The alumina supply system is an extremely important part of the production of electrolytic aluminum. The quality of the supply of fluorine-carrying materials directly affects the production process and product quality of electrolytic aluminum, and even affects the economic and technological indicators of the electrolytic workshop. In the daily control and material supply process of aluminum electrolytic fluorine-carrying materials, the current domestic electrolytic aluminum enterprises generally adopt the following method: use the blanking punching plate flowmeter to control the opening of the blanking arc valve to adjust the fresh alumina entering the purification body supply. The process of supplying alumina equipment is as follows: fresh alumi...

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Problems solved by technology

This method has the following disadvantages: (1) Design defects such as low accuracy of the punching plate flowmeter and inaccurate opening of the arc valve prevent operators from remotely and accurately controlling the opening of the arc valve, thereby affecting the supply of fresh alumina Stability and uniformity; (2) There is no effective monitoring device in the design of process equipment, and employees do not have accurate reference and basis in the process of adjusting the amount of fresh alumina cutting, and it is difficult for managers after process problems occur The investigation of the cause and the investigation of the responsibility lead to a vicious circle of material control in the final output of the fluorine-carrying alumina with high fluorine ratio; (3) The alumina in the fresh alumina bin will harden and block the arc valve. Phenomena are not easy to detect if personnel do not go to the site; (4) There will be impurities in the alumina. The original design needs to be cleaned at the horizontal chute at least twice a month. During the cleaning period, the supply of alumina is suspended, which will cause the oxidation of fluorine in the purification body. The fluorine content of aluminum is too high, and the labor intensity of cleaning up impurities is high

The above reasons lead to the fluorine-containing ratio of the final output fluorine-carrying alumina being high and sometimes low, and the purification ratios are also uneven. It is difficult to meet the material process control requirements in the fine management of the electrolytic cell, which directly affects the quality of the electrolytic cell. The quality of process control also affects the compliance of organized emissions such as HF and SO2 in the purification system

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