An electric heating roasting device and roasting method before starting an aluminum electrolytic cell

Abstract

The invention discloses an electric heating roasting device before starting, which comprises an electrolytic cell cathode carbon block or a special-shaped cathode carbon block (1) in an aluminum electrolytic cell, and an electric heating device ( 2), an aluminum silicate fiber board (3) is laid under the electric heating device (2), a support (4) is set on the side silicon carbonitride block of the cathode of the aluminum electrolytic cell, and a thermal insulation plate is laid on the support (4). plate (5). In the present invention, an electric heating device is laid on the cathode carbon block of the aluminum electrolytic cell. The electric heating device is preferably a crawler-type electric heating device, so that the cathode of the electrolytic cell, the cathode boss and the surrounding paste can be heated as a whole at the same time, and the heating temperature is relatively uniform. , improve the effect of cathode roasting.

Description

technical field [0001] The invention relates to an electric heating roasting device and a roasting method before starting an aluminum electrolytic cell, and belongs to the technical field of aluminum electrolytic cells. Background technique [0002] The existing roasting method of the cathode before the electrolytic cell is started is to use the mixed material roasting method, and the cathode carbon block is heated and roasted by using the electrolytic current of the electrolytic cell itself. However, with the optimization and development of aluminum electrolytic cell process technology, special-shaped cathode carbon blocks have become the preferred substitute for the production of aluminum electrolytic cell cathodes. If the existing cathode carbon block roasting method is continued, there will be special-shaped cathode carbon blocks and anodes. The carbon block has less contact surface, uneven heating, long roasting time, easy oxidation, and poor effect. The existing mixtu...

AI Technical Summary

Problems solved by technology

However, with the optimization and development of aluminum electrolytic cell technology, special-shaped cathode carbon blocks have become the preferred substitute for making aluminum electrolytic cell cathodes, so if the existing cathode carbon block roasting method continues to be used, there will be special-shaped cathode carbon blocks and anodes. There are few contact surfaces of carbon blocks, uneven heating, long roasting time, easy oxidation, poor effect, etc.

The existing mixture roasting method also has the disadvantage of uneven heating to a certain extent.

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