Development of Shaft-type Scrap Melting Process Characterized by Massive Coal and Plastics Injection.
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- Ariyama Tatsuro
- Materials and Processing Research Center, NKK Corporation
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- Matsuura Masahiro
- Materials and Processing Research Center, NKK Corporation
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- Noda Hidetoshi
- Materials and Processing Research Center, NKK Corporation
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- Asanuma Minoru
- Materials and Processing Research Center, NKK Corporation
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- Shikada Tsutomu
- Materials and Processing Research Center, NKK Corporation
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- Murai Ryota
- Materials and Processing Research Center, NKK Corporation
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- Nakamura Hiromi
- Keihin Works, NKK Corporation
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- Sumigama Takashi
- Steel Technical Center, NKK Corporation
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Abstract
A shaft-type scrap melting process in which a large amount of pulverized coal and waste plastics are used as a heat source has been newly proposed. To confirm the characteristics of this process, an experimental furnace with 2 m3 inner volume was continuously operated. The main results are as follows:<br> (1) Pulverized coal and plastics could be effectively used to melt steel scrap, and a newly designed oxygen burner enabled massive injection of such fuels. <br>(2) Combustion efficiency of coarse plastics was higher than pulverized coal due to the its accumulation effect in the raceway. Hydrogen chloride during polyvinylchloride injection was about 5 ppm in the gas cleaning system.<br> (3) Top charge of plastics generated tar derived from decomposition of plastics in the shaft with low temperature.<br> (4) Zinc charged with scrap was carried over as zinc oxide with dust in the upward gas, and no adhesion was recognized within the furnace.<br> (5) Maximum productivity was estimated to be 14 t/dm3 from the viewpoints of flooding and melting rate of scrap. <br>On the basis of the above operation results of the experimental furnace, the operating condition of the commercial process was investigated.
Journal
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- ISIJ International
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ISIJ International 37 (10), 977-985, 1997
The Iron and Steel Institute of Japan
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Details 詳細情報について
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- CRID
- 1390282681428883072
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- NII Article ID
- 10002457161
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- NII Book ID
- AA10680712
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- COI
- 1:CAS:528:DyaK2sXnslyrurc%3D
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- ISSN
- 13475460
- 09151559
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed