In the production process of prebaked anodes for aluminum electrolysis, batching is an important process . The ingredients are the production process of weighing and agglomerating aggregates, powders and binders of various particle sizes according to the formulation requirements. The ingredients include three aspects: first , select the variety of carbonaceous raw materials and the proportion of different raw materials; second, determine the particle size composition of aggregates and powders; third , select the type of binder and the proportion of use. The ingredients have a considerable influence on the quality of the finished product and the yield of the molding , baking and other processes . In order to optimize the anode production process and broaden the scope of market adaptation , after many investigations and demonstrations, through the application of domestic equipment , the PLC system was selected , and the automation technology research and transformation were carried out on the key processes of batching and oil distribution.

The main technical and economic indicators of the system:
1) Static weighing accuracy: 0.2%
2) Dynamic weighing control accuracy: ± 2kg
3) Batching speed: 1800kg/12min
4) Oil distribution speed: 350kg/12min
5) Requirements for compressed air: 0.55~0.7Mpa
6) Gas consumption: 0.2m3/h
7) Working environment of electric control cabinet: 0～25°C without dust

The technological advancement of the technology:
1) Change the mobile batching car to a fixed weighing hopper;
2) The oil distribution process adopts a linear conical pneumatic control asphalt valve designed and manufactured by itself to realize the automation of the oil distribution process;
3) In order to ensure the quality of the kneading, the working condition of the kneading machine is included in the monitoring range of the system to avoid misoperation.

The technology successfully applied the PLC system to the control of the production process. The application practice proved that the data collected by the system is comprehensive, the control of the automatic batching system is reasonable, the control scheme and the operation procedure are simple and easy, and the control method based on the manual control switch is changed to improve The accuracy of the ingredients and the quality of the ingredients and oil distribution reduce the production cost, reduce the labor intensity of the operators, and effectively protect the production environment . After one year of production practice , the research and application have reached the leading position in the domestic industry . Level. Has significant economic and social benefits.