Torrefaction method for pre-baked anode for aluminum

A prebaked anode and roasting technology, which is applied in the field of improvement of the roasting process in the production process of aluminum prebaked anodes, can solve problems such as equipment burnout, workshop shutdown, and product qualification rate impact

Active Publication Date: 2008-12-03
中铝矿业有限公司 +1
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  • Abstract
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Problems solved by technology

In addition to arranging a fixed time every month to clean the pipe, flue, and smoke exhaust machine, once there is a fire phenomenon or other fire sources, it will immediately bring about a relatively large fire accident
As a result, the workshop stops production, equipment burns out, affects production, and even brings millions of economic losses
At the same time, due to the low temperature rise in the early stage, the temperature of the product and the temperature of the fire path are not up to the theoretical requirements. In the 4P stage, a large amount of energy consumption is required, and the temperature rise is a serious violation of the process discipline, which has a great impact on the qualified rate of the product.
[0003] While the above-mentioned existing process control methods cause serious energy waste, there are serious safety hazards, and the operation control is difficult

Method used

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  • Torrefaction method for pre-baked anode for aluminum

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Embodiment Construction

[0009] A prebaked anode roasting method for aluminum, in which the initial value of 2P is controlled to be 350°C±20°C and the end point value is 750°C±20°C during the roasting process.

[0010] For example, at the 1P position, since the temperature measurement point at the 1P position is occupied by the pipe, and the temperature measurement at the 1P position has no practical significance for the entire temperature control, no temperature measurement point is set; at the 3P position, a large amount of volatile components volatilize, And the temperature value will fluctuate from high to low after the volatile matter volatilizes; at the same time, the temperature rise rate in the volatile matter volatilization stage can reach about 20°C in an instant (and the temperature of the product does not rise rapidly). Therefore, the 3P temperature point is not controlled. The end temperature of point 2P1 is controlled at around 750°C. The final temperature value of point 4P1 is based on...

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Abstract

The invention discloses a method for roasting a pre-roasted anode for aluminum and relates to an improved roasting process in the process of producing the pre-roasted anode for the aluminum. The method is characterized in that: in the roasting process, an initial value of 2P is controlled between 330 and 370 DEG C, and an endpoint value of 2P is controlled between 730 and 770 DEG C. The method for roasting the pre-roasted anode for the aluminum can effectively utilize heat energy produced by the combustion of volatile compositions, improve production capacity, save energy, remove the hidden trouble of safety and relieve the difficulty of operation.

Description

technical field [0001] The invention discloses a baking method for a prebaked anode for aluminum, and relates to an improvement of a baking process in the production process of a prebaked anode for aluminum. Background technique [0002] At present, prebaked anodes for aluminum are mostly roasted in 36-chamber ring-type roasters. In terms of roasting process control, Room 36 is divided into two systems for operation. Each system has 18 furnace chambers, including 6 operating furnace chambers, 6 cooling furnace chambers, and 6 furnace chambers to be loaded or discharged or repaired. The six operating furnace chambers are called 1P, 2P, 3P, 4P, 5P, 6P in sequence from low temperature to high temperature. There are four viewing holes on each fire path. According to the position of the fire viewing hole, the direction along the pipe to the high temperature is called 1 o'clock, 2 o'clock, 3 o'clock, and 4 o'clock in turn. Among all the roasting furnace process operation conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C04B35/52C04B35/64C25C3/12
Inventor 王金合李德坤黄其荣王利敏王占波
Owner 中铝矿业有限公司
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