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| The heating system of steel roll can choose among electric, induction, heat medium (e.g., oil, hot water, etc.) circulating, steam, gas, and so on. Since the heating roll is one of most important element in calender, the heating system has to be selected according to the processing material and its purpose. The feature of each heating system is as follows. |
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| - Induction Heating System |
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The source of this direct heating system is eddy currents developed by electromagnetic field. The optimal construction of this roll is designed by finite element analysis. Merit of this heating system is high thermal efficiency, quick response, and uniformed distribution of temperature on the roll surface.
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| - Electric Heating System |
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Plural electric pipe heaters are installed inside of steel roll. The merit of this system is feasible for maintenance and economical because of its simple construction.
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| - Heat Medium Circulating System |
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The circulation volume of heat medium is depends on the production speed. The merit of this system is available wide temperature range and uniformed distribution of temperature on the roll surface. An additional boiler that is energized by gas, oil, and so on is necessary.
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| - Steam Heating System |
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The pressure and temperature of inner steam is available. An additional steam boiler that is energized by gas, oil, and so on is necessary.
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| - Gas Heating System |
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A burner is installed inside of steel roll. The merit of this roll is easy to get high temperature.
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