WATER MODEL SIMULATION FOR DETERMINING RATE OF SPLASHING AND MIXING TIME ON GAS BLOWING ON LADLE

• Main Author: AGUSNADI (NIM : 12507001), MOHAMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23110
• Institution: Institut Teknologi Bandung

Nickel is one of the most used daily metals. One of the process step to produce ferronickel is oxygen lancing. In order to increase the temprature of crude ferronickel for desulphurization. In this reason, the water model is used to study the oxygen blowing behaviour in ladle. <br /> <br /> <br /> <br /> The amount of splashing, mixing time, depth of gas penetration into water and oscillation caused by gas blowing by top lance and combination of top lance and <br /> <br /> <br /> <br /> bottom stirring are studied in this research. In this experiment, the distance of lance tip to the melt and usage of bottom stirring on the process. Lance used for <br /> <br /> <br /> <br /> this process is half-inch diameter stainless steel pipe and the laval nozzle pipe with opening angle 20o,15o and 10o respectively. <br /> <br /> <br /> <br /> The results of experiment show that amount of water splashed is done by laval lance is more than ordinary lance. Bottom stirring is very influential for reducing <br /> <br /> <br /> <br /> the mixing time. With the operation of bottom stirring, the mixing time can be reduced by half off the mixing time without bottom stirring. The maximum gas penetration depth is done by laval lance is deeper than the ordinary lance and the oscillation done by laval lance is more tense than ordinary lance. Thus the <br /> <br /> <br /> <br /> ordinary lance is more recommended than laval lance because of lower splashing rate, better mixing time, and less intense oscillation.