Abstract:

In order to solve the problem of flotation column of coal preparation plant low degree of automation, not timely adjustment, high labor intensity, product quantity and quality index of poor stability, the paper proposed a design scheme of automatic control system of flotation column based on PLC. The system through the PLC to realize the automatic control of floating concentration, foam layer thickness, reagent,the statistics of processing capacity of slime, reagent consumption, remote monitoring of the condition of flotation column. The practical application shows that: the system is stable, control effect is good, labor intensity of workers is reduced , product quantity and quality index improved significantly.

Key words: coal preparation plant, flotation column, PLC, automatic control, remote monitoring, expert system