Scientific Journal Problems of Emergency Situations - D. Tregubov, L. Trefilova, O. Danyk, K. Rusenko, V. Mazurov. Using fire extinguishing experience in the metallurgical coke wet quenching technology. Р. 114-129.

The metallurgical coke wet quenching technology was improved. An efficiency comparison, cost-effectiveness and environmental friendliness of coke cooling processes after removal from the furnace using wet and dry methods was carried out. These processes similarity to water fire extinguishing and fire quenching with non-flammable gases was analyzed. Attention is focused on wet quenching advantages and disadvantages and this technology improving feasibility. It is argued that coke single-stage quenching has significant thermal stresses in the lump due to a significant temperature excess in the lump middle over the surface temperature, which at the same time reduces the wastewater impurities neutralization efficiency on the coke surface. The theoretical possibility of the wastewater utilization efficiency increasing using wet quenching, reducing water consumption, improving the coke quality as an important blast furnace process component, and reducing the toxic gas contamination area near the quenching tower is shown. It was established that this issues set can be solved by the water supply phasing selecting for quenching in a pulsed mode, which can ensure the coke lump cooling process uniformity. The water cooling capacity theoretical value of the under conditions of the coke standard single-stage wet quenching and under this ability full use conditions was calculated. It was shown that the using water efficiency as a cooling agent increases if it is completely evaporated and the steam is heated to the coke temperature. According to the assessment, the supply time and water consumption are reduced by 7.5 times when its cooling ability is fully utilized. It is proposed to carry out wet quenching in 3 stages: for 1 min – with concentrated wastewater, for 2 min – with diluted wastewater, for 3 min. – with technical water. The intervals system of water supply pulse mode for the coke cooling with a “supply-pause” scheme with a total quenching time of 219 s was developed, of which the total water supply time is 19 s.

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