from the conferences organized by TANGER Ltd.
<div>The paper is focused on experimental research with the goal of enhancing cold mill capability by improving the currently used coolant setting (various types of emulsions) and cooling configuration (type of nozzle, nozzle position, distance and inclination angle of headers with respect to the roll).The experimental research was divided into two phases. The initial phase examined the impact of various emulsion types on cooling intensity. Pure water, coconut, lard and palm oil-based emulsions with various oil concentrations were tested. The highest cooling intensity was found for the pure water. The heat transfer coefficient decreased with the increase of the oil concentration. The cooling intensity was comparable for different emulsions.The second phase was focused on cooling optimization. The goal was to enhance cooling intensity while reducing the consumption of the cooling medium. The research methodology was based on the specialized experimental stand that simulated cooling processes on a rotating surface. The heat transfer coefficient was investigated for a typical cooling system. Then, the cooling configuration (nozzle size, type, position and header inclination angle) was optimized and the comparison of a new and old cooling system shoved higher cooling efficiency with lower water consumption (25 % less).Finally, roll cooling simulations were conducted for both cooling variants to compare the impact on roll temperature during rolling. The advantage of the optimized cooling system was minimal (roll temperature decreased by 5°C) due to the slight difference between the coolant temperature (60°C) and the strip temperature (200°C). However, lowering the coolant temperature to 20°C caused the roll temperature decrease by 30°C.</div>
Keywords: Cold rolling cooling; emulsion concentration; cooling intensity, heat transfer coefficient, cooling optimization© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.