Ferronickel Desiliconization and Decarburization Rate Process Simulation in LD-Converter
Low Carbon – Ferronickel (LC-FeNi) is produced after crude FeNi is refined in LD-Converter. There are a few parameters that need to be fulfilled in a converting process, among them are: desired crude FeNi final composition, final temperature of around 1600-1700oC, and an appropriate slag composit...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/24849 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Low Carbon – Ferronickel (LC-FeNi) is produced after crude FeNi is refined in LD-Converter. There are a few parameters that need to be fulfilled in a converting process, among them are: desired crude FeNi final composition, final temperature of around 1600-1700oC, and an appropriate slag composition. To make the achieving of mentioned parameters, there needs a simulation that could dynamically predict the parameters. <br />
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The making a converting operation simulation is divided into three periods, which are desiliconization, decarburization, and final decarburization. In the desiliconization step, the silicon will be oxidized and part of oxygen does not react with the silicon will react with iron and carbon. In the decarburization step, almost all of the oxygen will oxidize carbon and turn it into CO gas. In the final decarburization step, the rate of decarburization will decline and oxygen tends to react with iron. Under a condition where the rate of desiliconization, decarburization, and the formation of iron oxide are known, then it will become possible to predict the change of slag composition and temperature. <br />
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Also analyzed in the making of this simulation is the correlation between oxygen blowing rate and the desiliconization and decarburization process, along with temperature and slag composition change. Faster oxygen blowing rate will result faster desiliconization, decarburization rate and temperature rise. However, it will result into a low iron oxide amount in the slag. The slag composition was not simulated well due to the exclusion of CaO dissolving kinetics in the slag. Verification results show that the average time difference between the simulation results and actual time is 2.35 seconds. |
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