Flame roasting direct-on starting process of aluminum electrolysis cell

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of metallurgy, can solve the problems of aluminum liquid leakage, large cathode thermal shock, excessive temperature gradient and set value deviation, etc., to prolong the production life and reduce the temperature gradient , the effect of preventing thermal shock damage

Active Publication Date: 2010-10-06
包头铝业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic and international aluminum electrolytic cell roasting start-up processes usually adopt aluminum liquid roasting, coke particle roasting and flame-aluminum liquid two-stage roasting start-up technology; different roasting start-up methods will have different effects on the cathode, anode and lining of the electrolytic cell. The main defects of the above method are: the roasting process cannot well realize the set roasting temperature rise curve, the thermal impac

Method used

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  • Flame roasting direct-on starting process of aluminum electrolysis cell
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  • Flame roasting direct-on starting process of aluminum electrolysis cell

Examples

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Effect test

Embodiment 1

[0042] Embodiment 1: a kind of aluminum electrolyzer utilizes flame roasting to start the process directly, and it comprises the following steps successively,

[0043] (1) Select the 5046# electrolytic cell of the 240KA electrolytic series;

[0044] (2) Install the anode used in the electrolytic cell, connect the detection and control system, and confirm that the equipment is installed in good condition;

[0045] (3) Install the gas control system and determine the position of the gas burner: Before the electrolytic cell is roasted, install the gas control system in the electrolytic plant according to the site conditions; divide the electrolytic cell into four roasting areas, and place a burner in each roasting area Temperature Sensor. There are 3-4 gas burners in each roasting area, and the gas burners are reasonably and evenly installed between the bottom of the anode and the upper part of the cathode in the furnace of the electrolytic cell; preferably, the gas burners are ...

Embodiment 2

[0072] Embodiment 2: a kind of aluminum electrolyzer utilizes flame roasting to start the process directly, and it comprises the following steps successively,

[0073] (1) Select the 612# electrolytic cell of the 200KA electrolytic series;

[0074] (2) Install the anode used in the electrolytic cell, connect the detection and control system, and confirm that the equipment is installed in good condition;

[0075] (3) Install the gas control system and determine the position of the gas burner: Before the electrolytic cell is roasted, install the gas control system in the electrolytic plant according to the site conditions; divide the electrolytic cell into four roasting areas, and place a burner in each roasting area Temperature Sensor. There are 2-3 gas burners in each roasting area; the gas burners are reasonably and evenly installed in the furnace of the electrolytic cell on the bottom of the anode and the upper part of the cathode; preferably, the position of the gas burner...

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Abstract

The invention discloses a flame roasting direct-on starting process of an aluminum electrolysis cell, comprising the following steps in sequence: selecting an electrolysis cell, installing the electrolysis cell, installing a gas control system, determining the position of a gas burner, debugging a gas temperature control system and setting a roasting curve of aluminum electrolysis cell temperature control equipment; controlling an ignition roasting procedure; starting the gas control system of the electrolysis cell; adopting a batch injection method to inject electrolyte in the electrolysis cell; and electrifying and starting the process. The process has the advantages that a cell chamber is heated uniformly by flame formed by reasonable arrangement of controllable gas; a better roasting effect is achieved by reducing the temperature gradient of a cathode surface along the vertical direction so as to prevent heat shock damage resulted from an overlarge heating gradient and non-uniform lining temperature; and a reasonable coking process for bottom mash is realized by setting a reasonable heating curve, thus effectively getting rid of moisture and volatile substances in a lining, reducing and effectively filling in holes produced in the roasting process of the cathode and the bottom mash, and enhancing the integrality of the cathode, the bottom mash and the lining.

Description

Technical field: [0001] The invention relates to a direct start-up process for flame roasting of an aluminum electrolytic cell, which belongs to the technical field of metallurgy. technical background: [0002] With the rapid development of aluminum industry, aluminum electrolysis control technology and aluminum electrolysis production process technology are becoming more and more perfect and mature, and various technical and economic indicators are also constantly improving. At present, the aluminum electrolytic cells mainly include: 160KA, 240KA, 280KA, 300KA, 320KA, 350KA, 375KA, 400KA and above large-scale prebaked electrolytic cells are used in industrial production; Great progress, but the large-scale prebaking of electrolytic cells also affects the life of aluminum electrolytic cells (production cell age) in my country. There is still a gap between the life of aluminum electrolytic cells in China and the life of advanced aluminum electrolytic cells in the world. [00...

Claims

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Application Information

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IPC IPC(8): C25C3/20
Inventor 赵洪生王云利董建雄常智杰栗争光焦木杰闫存定田建民谢恩边占平韩效义张福林张军沈利王龙召
Owner 包头铝业有限公司
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