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Method for reducing precipitation capacity in hearth of 400 KA electrolytic bath

An electrolytic cell and precipitation technology, applied in the field of electrolytic aluminum energy-saving process, can solve problems such as overheating, affecting electrolysis efficiency, poor furnace conductivity, etc., and achieve the effects of high current efficiency, enhanced self-balancing ability, and low power consumption production.

Inactive Publication Date: 2016-01-13
LINZHOU LINFENG ALUMINUM & ELECTRICITY
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Problems solved by technology

With the prolongation of the tank age, the deposits in the furnace continue to thicken, the conductivity in the furnace is poor, and even local overheating occurs, which affects the electrolysis efficiency

Method used

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Embodiment

[0019] A method for reducing the amount of sedimentation in a 400KA electrolyzer hearth, comprising the steps:

[0020] (1) Control voltage: The control voltage at the initial stage of electrolyzer startup is 8.92~9.93v, and the control voltage at other stages is set by conventional voltage data;

[0021] (2) Control the molecular ratio: after starting, the normal molecular ratio is stable between 2.62 and 2.66;

[0022] (3) Control electrolyte: the normal electrolyte level after starting is 18~20cm;

[0023] (4) Control the aluminum level: after starting, the aluminum level is controlled at 16.5~21cm;

[0024] (5) Control the electrolyte temperature: maintain the electrolyte temperature at 960°C~980°C within 1 month after start-up, and drop to the normal electrolyte temperature 930°C~940°C after 1 month.

[0025] According to the above-mentioned method for reducing the amount of precipitation in the hearth of the 400KA electrolytic cell, while performing the above content, ...

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Abstract

The invention relates to a method for reducing a precipitation capacity in a hearth of a 400 KA electrolytic bath; and the method comprises the steps of: (1) voltage control; (2) molecular ratio control; (3) electrolyte control; (4) aluminum level control; and (5) electrolyte temperature control. The method prolongs the service life of the electrolytic bath, saves the energy, improves the production stability of the electrolytic bath, and guarantees efficient and stable production of the electrolytic bath.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum energy-saving technology, and in particular relates to a method for reducing the amount of sedimentation in the hearth of a 400KA electrolytic cell. Background technique [0002] As electrolytic aluminum is a high-energy-consuming industry, reducing power consumption has always been a technical and management goal for the aluminum industry to reduce costs. In recent years, the state has become more and more strict on the electrolytic aluminum industry, the industry access standards have become higher and higher, and the competition among enterprises has become increasingly fierce. Many aluminum factories have adopted low-temperature and low-voltage production processes to reduce power consumption. With the prolongation of the tank age, the deposits in the furnace will continue to thicken, the conductivity in the furnace will be poor, and even local overheating will occur, which will ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/20
Inventor 管瑞江冯青山王永朝
Owner LINZHOU LINFENG ALUMINUM & ELECTRICITY
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