Production and calcination system of carbon anode for aluminium electrolysis and process control method of system

Abstract

The invention discloses a production and calcination system of a carbon anode for aluminium electrolysis and a process control method of the system. The calcination system comprises a recycle calciner unit including a plurality of furnace chambers, at least one flame control unit including multiple types of control racks and a hanging beam device used for moving the flame control unit, wherein each furnace chamber comprises a plurality of open-top material boxes which are arranged side by side; a sealed flame path is arranged on each of both sides of each open-top material box; each flame control unit controls 20 / 22 furnace chambers within each flame control period and moves forwards by one furnace chamber at the end of each flame control period. The calcination system has the advantages of being simple in structure, low in cost and high in finished product ratio. According to the process control method of the system, the flue gas temperature of branch pipes of exhaust racks (ER) is controlled to be 420-480 DEG C, and the airflow negative pressure controlled by zero pressure racks (ZPR) is minus 4-0 pa; the advantages of high production efficiency, simple and convenient operation and high safety and reliability are achieved, the production rate can be effectively improved by 15% or higher, and the fuel consumption can be reduced by 10%-25%.

Description

technical field [0001] The invention relates to a carbon anode production system, in particular to a production and roasting system of a carbon anode for aluminum electrolysis, and a process control method for charcoal anode roasting using the roasting system. Background technique [0002] The roasting process of the carbon anode is the heat treatment process in which the binder-pitch is carbonized into a coke anode. By roasting, the pitch between the carbonaceous particles is transformed into a solid coke film, so that the carbonaceous particles are connected into a whole with certain mechanical strength and physical and chemical properties. The quantity and quality of pitch turned into coke directly affect the performance of the finished product. During the carbon anode roasting process, the pitch in the green body will undergo a series of complex decomposition and polymerization reactions, and the change process can be roughly divided into five stages: (1) During the pro...

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Problems solved by technology

[0007] In order to solve the problems of low production efficiency, low utilization rate of waste heat, high fuel consumption, and prone to cracks affecting the quality of finished products in the carbon anode roasting system in the prior art, the present invention provides carbon anodes for aluminum electrolysis in two structural forms The production roasting system, wherein a carbon anode production roasting system for aluminum electrolysis, includes a circulation roasting furnace unit composed of multiple furnace chambers, at least one set of flame control units composed of various control frames, and a flame control unit for moving the flame The hanging beam device of the control frame in the control unit, each furnace chamber includes a plurality of open material boxes arranged side by side, and the two sides of each material box are equipped with closed fire channels to make the two adjacent material boxes There is only one fire passage between them, and four combustion measurement holes are uniformly distributed along the length direction on the upper side wall of each fire passage. The combustion measurement holes are connected to the inner cavity of the fire passage and are provided with a cover. There is a partition wall between each furnace chamber and the corresponding fire passages of adjacent furnace chambers are communicated with each other through the partition wall, and a slide valve for cutting off or opening the corresponding fire passages between adjacent furnace chambers is arranged in the partition wall; The set of flame control units includes smoke exhaust rack ER, temperature and pressure measuring rack TPR, low temperature combustion rack HR1, medium temperature combustion rack HR2, high temperature combustion rack HR3, zero pressure rack ZPR, blast rack BR ​​and cooling rack CR;

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