COMPARISON OF ELECTRICAL AND CHEMICAL ENERGY CONSUMPTION FOR MELTING PROCESS IN EAF AT SSP 1 AND SSP 2 PT KRAKATAU STEEL
Steel is a metal alloy that is widely used in the daily necessities from work equipment, household appliances, constructions, bridges, defense equipments, etc. Therefore, annual steel productions tends to increase. In 2011, worldsteel production reached 1.5 billion tons, increasing by 6.8% from 2010...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/24420 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Steel is a metal alloy that is widely used in the daily necessities from work equipment, household appliances, constructions, bridges, defense equipments, etc. Therefore, annual steel productions tends to increase. In 2011, worldsteel production reached 1.5 billion tons, increasing by 6.8% from 2010. It is creating steel as an essential commodity. <br />
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In Indonesia, there are some of companies that produce steel. One of them is PT. Krakatau Steel. PT. Krakatau Steel has 10 EAF comprised of 4 EAF that is placed in BSP, 4 EAF in SSP 1, and 2 EAF in SSP 2. The EAF placed in SSP 2 is equipped with oxy-fuel burner using “Cojet (Coherent Jet)” technology. Thus, tap to tap cycle in SSP 2 can be faster than SSP 1. Installation of oxy-fuel burner decreasing electrical energy (kWh/TLS) because some of energy is supplied by chemical energy from burning of natural gas. Therefore, comparison of the tap operation pattern and also the specific electrical and chemical energy required for smelting in EAF at SSP 1 and SSP 2 are studied in this research <br />
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In the furnace calculation of electrical and chemical energy is conducted by means of mass and energy balance in the furnace. By the analysis of plant data, it is shown that that electrical energy specific consumption in SSP 2 is greater than SSP 1, so that the oxy-fuel burner does not reduce the electrical energy consumption, but accelarate the smelting process. The chemical energy that is produced from smelting process in SSP 2 is greater than SSP 1. The cost for electricity and natural gas of the oxy-fuel burner usage are not much different from the cost of electrical energy that is used in SSP 1. So, it is suggested to use EAF Smelting with oxy-fuel burner in order to shorter tap-to-tap time |
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