#TITLE_ALTERNATIVE#

• Main Author: HERDIANTO 12102017, HEDI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/6204
• Institution: Institut Teknologi Bandung

ABSTRACT: <br /> <br /> <br /> <br /> <br /> <br /> <br /> Indonesia has large amount of mineral resources such as irondsand. However, Ironsand deposit has not been developed in Indonesia. This is due to low iron content in ironsand to be used as the raw material in steel industry. Indonesias ironsand contain few elements such as iron, Titanium, Silica, etc. The utilization of domestic ironsand natural resources is expected to support domestic steel industry in supplying raw material. The variables that been examined in this ironsand concentrate reduction experiment by coal reductor are mass ratio of reductor and ironsand, reduction temperature, and reduction time. In this study the mass ratios of coal/ironsand that were selected are 0.25; 0.33; 0.43; 0.54; and 0.67. The temperatures selected for this expereiment were 900C, 950C, 1000C, 1050C, and 1100C, while the reduction times that were chosen are 30, 60, 90, 120, and 150 minutes. The products of reduction process were analyzed by chemical analysis and mineralogy analysis. Mineralogy analysis describes microstructure of sample based on metallic cluster. In this experiment, shrinking unreacted core model was used to describe and to analyze reduction process. The experiments wer carried out sequently to determine the optimum values of mass ratio, temperature, and time. The highest metallization degree was selected from the results of chemical analysis in each stage of experiment. The information that been resulted from each stage is used in the next stage of experiment. The final Experiments results show that the highest metallization degree is 51.75% in condition with 0.54 mass ratio at 1100C for 150 minutes. <br /> <br />