APPLICATION OF JET IMPINGEMENT COOLING IN STEEL PRODUCTION: A REVIEW OF CONSTRAINS AND PROSPECTS

Initial surface temperature, Leidenfrost Phenomenon effect on water jet impingement cooling and lack of heat transfer energy balance on steel cooling as the cause of high cost of steel, lack new steel properties emergence and incomplete data on jet impingement cooling respectively. These are the causes while designers are calling for reduction in cost of steel. Thus steel rolling mills are recommended to have combined nozzle headers for top surface and bottom surface cooling, while for research, Run-out table combine nozzle headers are to be designed, developed and installed. Also for a complete database on jet impingement cooling, top or bottom surface cooling in all existing literature needs to be done for completeness of the jet impingement database. Agricultural raw materials with paraffin oil is r ecommended for replacement or near substitute to water, expected to give a new steel grade property. Lower initial temperature of 500oC down to 400oC is recommended for lower steel cost of production.