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Coke particle baking startup method for pre-baked anode aluminum electrolytic cell and structure thereof

A technology for firing start-up and aluminum electrolytic cells, which is applied in the field of coke particle roasting start-up method and structure of pre-baked anode aluminum electrolytic cells, which can solve the problems of affecting the working life of electrolytic cells, easy to produce early leaks, and lining damage, etc., and achieve shortening Effects of abnormal period, small deformation, and life extension

Active Publication Date: 2011-02-02
SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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AI Technical Summary

Problems solved by technology

The traditional start-up method now uses a certain height of electrolyte in the middle seam as the start-up condition. At this time, the temperature of the lining has exceeded 1000 degrees, or even as high as 1100 degrees. Too high a temperature will increase the possibility of damage to the lining and cracks. On the one hand Affect the working life of the electrolytic cell, on the other hand, it is easy to produce early leaks

Method used

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  • Coke particle baking startup method for pre-baked anode aluminum electrolytic cell and structure thereof
  • Coke particle baking startup method for pre-baked anode aluminum electrolytic cell and structure thereof
  • Coke particle baking startup method for pre-baked anode aluminum electrolytic cell and structure thereof

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with accompanying drawing.

[0039] A method for starting the roasting of coke grains in a prebaked anode aluminum electrolytic cell, comprising the following steps: a step of installing a thermocouple, a step of laying coke grains, a step of charging a furnace, and a step of roasting control;

[0040] The step of thermocouple installation is to install the thermocouple on the cathode carbon block first, and the thermocouple is placed in the pre-drilled hole on the cathode carbon block, such as image 3 A hole with a diameter of 4 to 12 mm is drilled on the inner lining of the cathode carbon block shown, and the thermocouple is inserted into the cathode carbon block to a depth of 15 to 20 mm. figure 2 The shown thermocouples are arranged at three positions on both sides and the middle of the length direction of the cathode carbon block, and each position is provided with three thermocouples in the wid...

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Abstract

The invention relates to a coke particle baking startup method for a pre-baked anode aluminum electrolytic cell and a structure thereof. The structure comprise a cathodic carbon block; the cathodic carbon block is provided with an anode group; the cathodic carbon block is provided with a thermocouple; both ends of the anode group are provided with steel plates; electrolyte blocks are arranged between the steel plates and a pot shell; and a coke particle layer is arranged between the cathodic carbon block and the anode group. The method and the structure have short baking startup process, savea large quantity of electric energy, prolong the service life of the electrolytic cell, improves the aluminum yield, reduce direct current power consumption, are favorable for maintaining the steady production of the electrolytic cell, prolong the service life of the electrolytic cell, and reduce the workload and the consumption of compressed air.

Description

technical field [0001] The invention relates to a method for starting the roasting of an electrolytic cell, in particular to a method and structure for starting the roasting of coke grains in a prebaked anode aluminum electrolytic cell whose operating current is from 160kA to 400kA or larger by using the Hall-Elu method to produce primary aluminum. Background technique [0002] There are two common roasting start-up methods for the existing large-scale prebaked anode aluminum electrolytic cell, one is the start-up method using coke particles as the medium, and the other is the method of using gas roasting start-up. [0003] The method commonly used in China is the method of starting coke grain roasting. Chinese patent ZL99120950.8 discloses the coke grain roasting method, is the way that domestic generally adopts. In this patent, fluoride salt and soda ash are mixed according to the molecular ratio of 2.8 to 3, and the calcium fluoride content is controlled to be 4 to 6% fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/06
Inventor 杨晓东刘雅锋朱佳明孙康建周东方
Owner SHENYANG ALUMINIUM MAGNESIUM INSTITUTE
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