Operation method for increasing production of calcine furnace for prebaked anode of aluminum

Abstract

Disclosed is a production-increasing and operating method for an aluminum-used prebaked anode calciner, which relates to a method of production of a prebaked anode for aluminum. The method is characterized in that the process conditions controlled in the operation process are that: (1) the control precision of a coke volatile matter before calcinations is controlled to 10+-1 percent; (2) the material discharging system includes four times of material discharging per hour with each discharging consuming nine minutes and pause for six minutes; (3) the total negative pressure in a flue is controlled between -100 and -150Pa, and the negative pressure of a flame path is controlled between -40 and -55Pa; and a fire port is cleaned every eight hours, a lateral path is cleaned every fifteen days, the period for cleaning a volatile matter artery and an overflow port is twenty days, and a charging bucket is cleaned every three months; and (4) a preheating air outlet is arranged on the side wall on a preheating air vertical path on a calciner. The method of the invention can increase the actual yield of the calciner from the original 80kg of discharge pre tank per hour to 120kg of discharge pre tank per hour; and the coke quality after calcinations is obviously improved, and the control level of the true density is stabilized at over 2.05g / cu.cm and can reach over 2.07g / cu.cm under a better condition.

Description

technical field [0001] The invention discloses an operation method for increasing production of a prebaked anode calciner for aluminum, and relates to a production method for a prebaked anode for aluminum. Background technique [0002] At present, the design capacity of the 24-can downstream eight-layer fire channel calciner used in the calcination process of aluminum prebaked anodes is 80kg per can per hour, and the service life is generally 8 years. [0003] In the actual production operation, the volatile content control accuracy is 10±2%, often because the volatile content is too high or too low, the temperature and negative pressure of the calciner are unstable, the overall temperature of the furnace body is not high, and the calcination zone is short, generally Controlled in the second to fifth layers, the specific gravity of the calcined coke is 2.00g / cm 3 ~2.05g / cm 3 The overall level is not high, and it cannot meet the high standard quality requirements of export ...

AI Technical Summary

Problems solved by technology

[0003] In the actual production operation, the volatile content control accuracy is 10±2%, often because the volatile content is too high or too low, the temperature and negative pressure of the calciner are unstable, the overall temperature of the furnace body is not high, and the calcination zone is short, generally Controlled in the second to fifth layers, the specific gravity of the calcined coke is 2.00g / cm 3 ~2.05g / cm 3 The overall level is not high, and it cannot meet the high standard quality requirements of export anodes

[0004] At the same time, the designed production capacity is 80kg per can per hour, which limits the total overflow of volatile matter per unit time. The high-temperature calcination zone is generally located on the second to fifth floors of the fire path

The output is low, the discharge system is three discharges per hour, each time the discharger rotates within 8 minutes, the movement time of petroleum coke in the furnace is shorter than the stop time, resulting in abnormal coking on the tank wall

[0005] Calciner has large investment, low output, and long payback period, which is very unfavorable to reduce the cost of anode; breakthrough design production capacity and matching process technology control and operation methods are not compatible, which will easily lead to shortened life of calciner and poor quality of coke after calcining. reduce