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Volume 56, Issue 11
Displaying 1-10 of 10 articles from this issue
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[in Japanese]1977 Volume 56 Issue 11 Pages 853-854
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (376K) -
Osamu Thukamoto1977 Volume 56 Issue 11 Pages 855-859
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThis paper reports the current circumstances around the demand and suplly of general purpose coals in Japan and some other countries. In addition to them, the demand-suplly plans of them in 1985 and 1990 in Japan are reported too.
The present rules and regulations for environmental protection and the handling of coal and many factors restric the use of coal. But, in order to reduce the oil dependence, it is very necessory to promote the technical innovations and developments for the use of coal and to use the coal positively in many fields.View full abstractDownload PDF (642K) -
Shigeru Tamanuki1977 Volume 56 Issue 11 Pages 860-870
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAttaining various technologies of effective utilization of coal is needed for massive use of coal.
Development of flnidized-bed boilers is attracting world wide interests and is also one of the most important research themes in Japan. These papers are aimed at suggesting the direction of their research development and the possible applications from Japan's point of view.View full abstractDownload PDF (1585K) -
Masayuki Horio1977 Volume 56 Issue 11 Pages 871-877
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn order to make the research needs clear for the development of the Fluidized-Bed Combustion (FBC) particularly under the circumstance of Japan, the knowledges on the FBC which have been accumulated during the past one and half decades are reviewed. Major attentions are payed on the design scheme, the characteristics of the process such as the combustion efficiency, sulfur retention and NO emission, the advantage and disadvantage of pressurized operation and the future of sulfuradsorbent regeneration. It is stressed that the low-NOx combustion technology and the disposal technique for ash and spent additive are needed for the commercialization of fluidized-bed coal combustors in Japan.View full abstractDownload PDF (954K) -
Hidehiko Sugimura1977 Volume 56 Issue 11 Pages 878-885
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSSRC Process has these advantages which make it an effective methed for upgrading low rank Coal especially Sub-bituminous coal and lignite, as we have reviewed.
1. Process availability in technology and economy.
2. Inovated chemical structure of SRC.
3. Aptness for a binding force in producing metallurgical coke.
4. Diversified use for carbon material.View full abstractDownload PDF (938K) -
Yoshio Kiritani, Michio Tuyuguchi, Naomichi Nire1977 Volume 56 Issue 11 Pages 886-898
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn view of shortage of coking coal supply in future, it has been expected to establsh the processes which could use non-coking coal for making of metallugical coke.
At first, four main technices which is anticipated to be available for this intention were described in outline. Secondary development of D. K. S formed coke process and SUMICOAL-system which consist of the use of special caking substance, ASP, and the method of briquette blend were elucidated, D. K. S process is not continious, but has reached to possible step could prduce formed coke in commercial.
SUMICOAL-system has consumed non-coking coal over one million ton age for the past year, and its coke quality was confirmed to even to conventional coke, through results of laboratory testes and 5, 000m3 class B. F operation.View full abstractDownload PDF (1579K) -
Osamu Tajima1977 Volume 56 Issue 11 Pages 899-908
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSRecent topics and tendency of direct ironmaking (direct reduction) processes using non-coking coal as reductant are surveyed.
The significance of direct reduction is mentioned in comparison with the conventional ironmaking process using bast furnaces. Althongh more than 98% of iron in the world is produced by blast furnaces, iron and steel industries have been strongly interested in the development of direct reduction processes due to the worries of energy supply in the future.
In some direct reduction processes, non-coking coal is charged to reduction furnace without any chemical reforming. Rotary kiln is mainly used in these processes. Five commercial plants of the SL/RN process are operating in the world. Features of reductant-included-pellets are also described.
Finally, different direct reduction processes are presented. In the processes, reduncing gas in advance reformed from non-coking coal is injected to reduction furnace.The Midrex process is mentioned as a typical example.View full abstractDownload PDF (1254K) -
Yoshiteru Jomoto1977 Volume 56 Issue 11 Pages 909-916
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAs one of the methods for reducing the blast furnace coke rate, there is the technique of injection auxiliary fuels from the tuyers.
Operating problems have been encountered when injecting coal as an auxiliary blast furnace fuel. These must be overcome before coal injection will receive widespred application.
It is possible by such a simple measure as imprving the fuel oil injection equipment somewhat to obtain a slurry injection of 30wt% coal concentration; but at such a high concentration as 50wt%, the burner is liable to be clogged. It is thus necessary to contrive the injection equipment in such a way as to make the injection volumes even for all the tuyeres. By completing such an equipmene, we have been injected slurry of 50wt% coal concentration with satisfactory results.View full abstractDownload PDF (1049K) -
Shinjiro Watari, Shigeru Tamanuki, Akiyoshi Baba1977 Volume 56 Issue 11 Pages 917-924
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSRecently the colloidal fuel in which pulverized or peptized coal are suspended in oil the amounts of which ranges 30-50wt% has been spotlighted because it could be handled as easy as the so called liquid fuel.
There is no serious problem in using it for pructicul use as it can be handled with combination of the already completed technologys. From the economical viewpoint, the cost of combustion lies between that of coal and oil.
The large amounts of coal can be transporled in this form of the coal and oil mixture and be expected for the use of electlic power station, steel industry, cementindustry and so on.View full abstractDownload PDF (1294K) -
[in Japanese]1977 Volume 56 Issue 11 Pages 925-928
Published: November 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (526K)
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