Automatic Mold Powder Feeding System—Slab Continuous Casting

Automatic Mold Powder Feeding System—Slab Continuous Casting

Industry status
       At present, in my country's metallurgical enterprises, most of the continuous casting mold powder addition is done manually. The so-called manual addition means that the operator uses a powder pusher and a hook to continuously add mold powder into the mold manually. This is a tedious, labor-intensive and difficult-to-operate method of mold mold powder addition. Law. Due to the wide section of the slab continuous caster, complex operations, compact on-site equipment installation, and narrow space, the development of automatic powder adding technology is slow, and most of them use manual powder adding to add mold flux. It is difficult to add a small amount of mold powder evenly to maintain a stable state condition of the mold powder using manual operation. The uneven amount of powder often occurs, which not only causes waste but is also detrimental to quality improvement.

Automatic powder adding technology can maintain a constant flux flow and keep the flux in the crystallizer in a stable state. Therefore, it can reduce quality defects, reduce manual operating errors, reduce accidents, increase output, and reduce waste; at the same time, it can improve the automation of continuous casting machines. degree, reduce workers' labor intensity, improve the operating environment, and reduce safety accidents.

MAC-G320 automatic mold powder adding system is a new generation product of automatic mold powder adding independently developed by Wuhan CenterRise M&C Engineering Co., Ltd. The system analyzes and calculates the results through intelligent software based on different steel types, pulling speed, vibration and other process parameters. Accurate powder addition, sending out signals to control the powder addition process and powder addition, and designing appropriate nozzles and propellers based on the fluidity of molten steel in the mold and the ductility of the mold powder. After the system is set up, no manual intervention is required, completely replacing the entire process of manually adding mold powder and realizing automation of powder addition.

mould powder feeding machine interface

Product composition
The system structure is simple and easy to apply. The whole system consists of three parts: silo, control operation box and actuator.
      1. The silo is designed according to the needs of the user and the process environment. It is generally recommended that the silo volume is not less than the amount of mold powder used for two pours. It can be designed as a multi-silo to meet the user's needs for multiple mold powder in one pouring process. use.

      2. Control operation box, including control software (optimal control strategy), control PLC, operation panel and human-computer interaction interface. It can realize combined control of multiple control methods and control strategies, and can also be adjusted online.

      3. The actuator, including a screw propeller and a pneumatic nozzle, achieves uniform spraying of mold powder.

Technical indicators
      Working voltage: AC220V
      Temperature range: -20℃-70℃
      Powder adding time step: 0.1s
      Powder adding cycle: 2s
      Maximum speed of mobile motor: 4800RPM
      Traverse speed range: 0-100mm/s
      Car traverse stroke: 0-1m
      Hopper capacity: >380L
      Applicable powder types: dry powder powder, granular powder and other mold powder
      The powder adding time, powder blowing time and powder adding interval can be adjusted and controlled at will according to user requirements.

Control method
The system can realize manual and automatic control modes

Manual mode: The operator inputs the set flow rate of the feeder through the touch screen, and adjusts the feeding amount by observing changes in the thickness of the mold powder. When the pulling speed increases, the consumption increases, and the output of the powder feeder can be increased by selecting an appropriate flow value. The manual mode is mainly used for unsteady casting conditions. The operator can adjust the feeding amount of the feeding system at any time according to the changing consumption of mold powder at any time.

Automatic mode: When the system switches to automatic mode, the PLC collects information from the continuous casting control system (4---20mA analog), automatically calculates the set powder layer thickness to maintain stable feeding, and controls the loop, replacing manual powder addition. Keep the mold powder in a reasonable powder layer structure.