| Summary: | 碩士 === 國立屏東科技大學 === 機械工程系所 === 95 === This paper studies the optimal processes of making water-quenched slag powder using the Taguchi method. This research work includes two phases: (1) to obtain the optimal gas flow rate in the pneumatic system; and (2) to obtain the optimal conditions of milling water-quenched slag powder. In the first part of research, the control factors include: (i) the recycle damper opening (%), (ii) the primary wind turbine damper opening (%), (iii) the second wind turbine damper opening (%), and (iv) the rotation speed of the separator (rpm). The temperature at exit of mill increased 7%, when the optimal operating conditions (i.e., the separator with a rotation speed of 710 rpm, the recycle damper with an opening of 85%, the second wind turbine damper with an opening of 40%, and primary wind turbine damper with an opening of 47.5%), were applied.
In the second part of research, the control factors include: (i) the amount of water-quenched slag (ton/hr), (ii) the primary wind turbine damper opening,(%), (iii) the mill-roller tension (kg/cm2), and (iv) the rotation speed of the separator (rpm). The amount of water-quenched slag powder at exit of mill increased by 35%, when the optimal operating conditions (i.e., the separator with a rotation speed of 710 rpm, the mill-roller with a tension of 95kg/cm2, the primary wind turbine damper with an opening of 43.5%, and the amount water-quenched slag of 58.5ton/hr), were applied.
The third part of the research is a discussion on preventing steel plate corrosion, with an optimization experiment which selects the rainbow sign ready mixed paint (yellow)/the artificial turpentine, China Hi-ment Corporation’s slag powder (＜25 m ), as well as Taiwan Electric Power Company’s Big Lin cinders powder (35um); Center Steel Carbon Company’s artificial graphite (＜25 m ) was the control factor. The theory confirmation experiment result showed that with the ready mixed paint (yellow) 20 grams /4 gram artificial turpentine, China Hi-ment Corporation’s slag powder 4 grams (＜25 m ), Taiwan Electric Power Company’s Big Lin cinders powder 2 grams (35um) as well as Center Steel Carbon Company’s artificial graphite 4 grams (＜25 m ), the steel plate weight was enhanced approximately 2.2%. The steel plate corrosion prevention effect is obvious.
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