SU810838A1 - Method of control loading of annealing conveyer machine - Google Patents

Description

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This invention relates to a technique for monitoring and controlling technological processes for the preparation of raw materials in the metallurgical industry.

There is a known method of controlling the loading of the calcining conveyor machine, providing for the regulation of the height of the layer of pellets on the pallets. Depending on the height of the layer and the mass of the raw pellets, the speed of the pallets of the machine is changed so that the height of the layer remains constant at a predetermined level.

The main disadvantage of this method of adjusting the height of the pellet layer is that when the speed of movement of the pallets changes, the length of stay of the processed material in the process zones changes.

Variations in the residence time of the material in the process zones cause deterioration in the quality of the calcined pellets and are reflected in their strength. Strength is one of the main factors characterizing their quality of finished products, which is due to the large number of transport overloads and the requirements imposed on raw materials used in blast-furnace production.

The purpose of the invention is to improve the quality of the pellets.

This goal is achieved by the fact that with stabilized pallet speed

changing the height of laying the bottom bed, compensating for fluctuations in the height of laying the raw pellets.

The essence of the method is illustrated in the drawing. The total height of laying layers bottom

Bed 1 and raw pellets 2 are measured by a sensor 3 of the layer height. The signal, characterizing the height of laying the layer on pallets, is fed to the secondary device 4, compared with the signal of the setpoint adjuster 5

a layer, and a signal equal to the difference between the laying height and the setpoint signal, is fed to the regulator 6, controlled through an amplifier 7 by an actuator 8 coupled with a gate 9, the position of which determines the height of the bottom bed layer.

As the height of the layer is increased, the signal from the height sensor becomes larger

setting signal 5. The error signal is fed to the input of the regulator 6. The regulator through the amplifier 7 controls the actuator 8, which lowers

The bottom bed bunker gate until the unbalance signal at the regulator input becomes zero, i.e., the height of laying the layer of pellets on pallets becomes equal to the set one.

When reducing the total height of the bedding, the scheme works in the same way, but the controller generates a signal aimed at increasing the bedding height of the bed.

Thus, the height of the layer on the pallets remains constant with fluctuations in the flow rate, their raw pellets and the stabilized speed of the pallets.

Formula inventions

The method of controlling the loading of the kiln conveyor machine, depending on the height of the pellet layer on the pallets, is distinguished by the fact that, in order to improve the quality of the pellets by stabilizing the speed of movement of the pallets, the bedding height of the bottom bed is compensated.

Sources of information taken into account during the examination 1. Ksendzovsky V. R. Automation of pellet production processes, M., Metallurgists, p. 173, 1971.

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Claims (1)

Claim A method of controlling the loading of a roasting conveyor machine depending on the height of the layer of pellets on pallets, characterized in that, in order to improve the quality of the pellets by stabilizing the speed of the pallets, the height of the bottom bed is altered, compensating for the variations in the height of the raw pellets.