Torrefaction method for pre-baked anode for aluminum
A pre-baked anode and roasting technology is applied in the field of improving the roasting process in the production process of aluminum pre-baked anodes, and can solve problems such as affecting production, difficulty in operation control, and equipment burnout.
Active Publication Date: 2010-08-25
中铝矿业有限公司 +1
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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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[0009] A prebaked anode roasting method for aluminum. During the roasting process, the 2P of the 36-chamber annular roaster is controlled to have an initial value of 350°C ± 20°C and an end point of 750°C ± 20°C.
[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 va...
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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, most of the prebaked anodes for aluminum use 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 concepts, t...
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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