SU365383A1 - METHOD OF AUTOMATIC REGULATION OF THE QUALITY OF BONDING OF ANGLOMERATION CHARGE - Google Patents

Description

one

The invention relates to the field of raw material preparation in the steel industry.

Methods are known for controlling the quality of the pelletizing of the sintering mixture in one of the parameters measured at the outlet of the drum pelletizer.

The disadvantage of such methods is the low quality of regulation due to the large transport delay that the drum pelletizer has.

The difference of the proposed method lies in the fact that in order to increase the homogeneity of the granulometric composition of the pelletized material, the flow of water used for pelletizing is adjusted depending on the temperature and amount of the charge, corrected for its granulometric composition after pelletizing.

The essence of the method is as follows.

Water consumption for pelletizing of the charge depends mainly on the consumption of the charge through the drum pelletizer, the temperature of the charge and the ability of the raw materials to pelletize (initial moisture, quantity and quality of return, composition of the ore part, etc.).

The sharpest fluctuations in water consumption for pelletizing, worsening the quality of granulation, are caused by sharp fluctuations in the flow rate and temperature of the charge on the inlet of the pelletizer. Measurements of the flow rate and temperature of the material are carried out before the drum pelletizer, thus eliminating the influence of the transport lag on the quality of regulation. Inaccuracies in the dosing of water, associated with the determination of the flow rate and the temperature of the PTS, are eliminated by a change in the flow rate of water depending on the quality of pelletizing,

determined at the exit of the granulator.

The drawing shows a block diagram of an automatic pelletizing quality control system. The auto-adjustment system consists of an multiplication block /, controllers 2 and, an actuator 4 and a drum pelletizer 5.

The system works as follows.

The input of the controller 2 from the output of the multiplication unit 1 receives a signal proportional to the product of the temperature f and the flow rate Qiu of the charge, i.e. the amount of heat introduced by the material into the drum. The regulator 2 through the actuator 4 controls the water flow rate based on the fact that for every 100,000 kcal of heat applied by the charge, an additional 1.5–5 kg of water is required.

Upon receipt of quality pelletizing |, 1.out

at the output of the pelletizer, different from

set by Jad at the input of the regulator 5, e of the output of the drum pelletizer 5 is sent a signal that is proportional to the mismatch between the set and the current values of the quality of pelletizing (1 back-Tstek). The regulator 3 through the regulator 2 and the actuator 4 changes the water consumption for pelletizing so that the current value of the quality of the pelletizing becomes equal to the target, i.e.. 0

Subject invention

Method of automatic control of the quality of agglomeration billet pelletizing.

including measuring its flow rate and temperature before pelletizing and adjusting the water supply, characterized in that, in order to improve the uniformity of the particle size distribution of the pelletized material, water flow for the pelleting is proportional to the amount of tenl introduced by the charge, corrected for the deviation of the current value of the particle size distribution from moreover, for every 100,000 kcal of heat applied by the charge, an additional 1.5 to 5 kg of zoda is metered.

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