THE DYNAMIC MODELING OF TIN SMELTING PROCESS PHASE I IN REVERBERATORY FURNACE TO OBTAIN MATERIAL TEMPERATURE PROFILE AND AMOUNT OF REDUCED TIN AS FUNCTION OF TIME

• Main Author: MAFTUH (NIM : 12507003), FAUZI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/22116
• Institution: Institut Teknologi Bandung

The tin smelting process is done in two stage, stage I is the concentrate smelting while the stage II is the slag smelting of the stage I product. In the smelting I, <br /> <br /> <br /> <br /> there are some parameters that have to be fulfilled including amount of crude tin to be tapped for a certain of time and the final smelting temperature more than <br /> <br /> <br /> <br /> 1200oC. To optimalize the process, especially to obtain a more efficient process, a dynamic modeling that can give a prediction of temperature and amount of reduced tin as a function of time is necessary. <br /> <br /> <br /> <br /> The modeling is developed by integration of heat balance with reaction reduction of tin's kinetic and coal volatile matter decomposition's kinetic. The kinetic of tin oxid reduction data which was investigated by Misra is applied in this research to find a relationship between the reaction rate of tin oxide reduction as function of temperature and time. <br /> <br /> <br /> <br /> The volatile matter decomposition's kinetic of reduction coal had the use of the equation obtained which was introduced by Nukman is used in this research to obtain the amount of volatile matter gas which is generated in the reverberatory furnace. <br /> <br /> <br /> <br /> Modeling result indicates that increasing rate of temperature is influenced by the air flow rate and MFO. If excessive air is flowed, then temperature in furnace will decrease. Moreover, reactions occured in furnace, started from MFO burning reaction, volatile matter combustion, and combustion of CO gas that comes from <br /> <br /> <br /> <br /> SnO2 reduction should be considered to determine air flow rate. The modeling result of material temperature during smelting process has been compared to the melt temperature measured in furnace. The material temperature modeling result at 19th hour is 50-100oC lower than furnace temperature. By modification air <br /> <br /> <br /> <br /> flow rate adjusted to the process requirement, the MFO consumption can be reduced. It can be done by installing an oxygen measurement system on off gas.