A method for automatic control of ore unloading of large ring cooler

Abstract

The invention provides an automatic control method of ore unloading of a large-scale annular cooler. The automatic control method comprises building a model of moving average processing procedures and a discharge spout position moving average control model in a programmable logic controller (PLC) programme, inputting variable 1 as the speed V of an annular cooler to calculate moving average period T, inputting variable 2 as the material level D of a discharge spout and the moving average value in the period T, and outputting the final frequency output value of a control signal plate-type ore unloading machine based on the adjusting control of the material level of the discharge spout, and a discharge spout material level controller program. The discharge spout material level controller program comprises designing an upper limit message box and a lower limit message box of the material level of the discharge spout, designing a selecting message box of locking and unlocking of the material level of the discharge spout, and inputting the locating speed of a mine machine on the menu of a sintering instrument through center control. If the material level exceeds the upper limit, a speeding-up ratio is a percentage of a difference value of an upper limit value in the upper limit, and if the material level exceeds the lower limit, the speeding-down ratio is a percentage of a difference value of a lower limit value in the lower limit. The discharge spout material level controller program further comprises the adjusting program of the speed setting value of a plate feeder and converting to automatic control.

Description

technical field [0001] The invention relates to the production of iron sintered ore of iron and steel, and is especially suitable for an automatic control method for unloading ore of a large ring cooler. Background technique [0002] Sintering is to mix iron concentrate powder, rich ore powder, metallurgical waste, coke powder, flux, etc. according to a certain ratio and add a certain amount of water to treat it, then ignite it on the sintering machine, ventilate and sinter it, and use the coke powder in the mixture to melt the mixture. The process of forming the raw materials required for blast furnace ironmaking. The ring cooler is the main equipment of the sintering plant. The main equipment of the ring cooler unloading system includes the ring cooler, the discharge chute, and the plate feeder. [0003] At present, the automatic control of large-scale ring cooler unloading at home and abroad generally adopts simple PID parameter adjustment control technology, which has m...

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Problems solved by technology

[0003] At present, the automatic control of large-scale ring cooler unloading at home and abroad generally adopts simple PID parameter adjustment control technology, which has many shortcomings, mainly because the output of the controller is wavy and fluctuates greatly due to the periodicity of ring cooler unloading.

Due to the large amplitude of the automatic control output, it cannot be realized in practice. At present, the actual use of the existing technology is mostly adjusted manually by the operator. Disadvantages: ① It is necessary to cooperate with manpower in the operation to monitor the material level value of the discharge chute in real time, and manually adjust the plate feed Mining machine speed; ②Due to too much human intervention in the speed control of the plate feeder, the material level control of the unloading chute is often too low, which is likely to cause increased wear of the unloading chute of the ring cooler; the plate feeder The ore output of the mining machine is uneven, which affects the screening efficiency

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