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Volume 52, Issue 7
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1973 Volume 52 Issue 7 Pages 589
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (2085K) -
Masao Sakisaka1973 Volume 52 Issue 7 Pages 590-594
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIncreasing the amount of energy consumption and the environmental polution accompanied therewith, is the most acute problem in Japan, compared with all other countries in the world.
How to secure the large amount of clean energy, how to exploit, how to put the technique against contamination to practice use, and how to develop the energy-Aaving-contrivance, will be the most important problem in order to keep the economical growth of Japan near in future.
Now, both of the energy balance and the environmental protection are the problem to be solved not only for the interest of one country, but also by mutual understanding and close cooperation through all the countries in the world in international point of view.
We believe that also in Japan, we can work out the solution of this problem only through international cooperation.View full abstractDownload PDF (846K) -
Influence of asphalts and pitches on the strength of the cokeTsugio Miyagawa, Yoshio Muroki, Mitsuo Saga, Hidetaro Tanihara, Shojir ...1973 Volume 52 Issue 7 Pages 595-603
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAs for a study on the coking property of asphalts and pitches, the influence of those additives on the strength of the coke was pursued. Firstly, the caking index, which was measured by means of carbonizing the coke powder mixed with additives, was obtained. Then, two kind of base coals mixed with additives were carbonized using the method of L. C. T.(Laboratory Coking Test).
The following results were presented.
1) The additives affected the nature of the plastication of base coals such as extending a plastic temperature range, increasing a maximum fluidity and forming the high-molecular thermally stable substances.
2) The additives also increased the caking capacity as a result of the accumulation of the liquid phase in the plastic mass.
3) Asphalts, particularly increasing a maximum fluidity and probably promoting the formation of high-molecular thermally stable substances, created conditions for better caking of the coals and hence for the production of stronger coke.
4) Pitches enriched with highly condensed aromatic hydrocarbons should be used as additives to the poorly caking coal of high coalification for improving the quality of the coke.
5) The caking capacity of additives did not always depend on the degree of aromatic condensation. Effects of additives on the strength of the coke were limited by quality of base coals.View full abstractDownload PDF (1157K) -
Syogo Matsunaga, Yasuo Funato, Hiroyuki Takashima1973 Volume 52 Issue 7 Pages 604-608
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn order to investigate characteristics of atomization of kinds of improved burner tips for the blast furnace, we have observed their apperances of atomization by means of experiments using water or heavy oil and measured atomized grain diameters by means of the experiment of “wax method”.
The results of consideration on the effect of factors on the atomization are as follows;
(1) In case of experiments using water or heavy oil in the stationary air, apperances of atomization of kinds of improved burners are much better than those of straight nozzle burners.
(2) But, in case of the experiment of “wax method” in the blast air, the grain size distributions and the mean atomized grain diameters are nearly equal if a velocity of blast air is equal.
(3) Namely, the atomization of oil in case of an oil burner for the blast furnace is influenced decisively by a velocity of blast air, and so it is necessary for fundamental improvements of burner to promote still more the atomization of oil.View full abstractDownload PDF (3069K) -
Part 1 Recovery of Raw-material, Lactam Monomer from Nylon (6) Processing WasteHiromi Tajiri, Isao Matsui1973 Volume 52 Issue 7 Pages 609-617
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSAn excellent method for the water pollution control is to treat the waste water in closed system.
In such a system, as the efficient substance contained in waste water can be recovered and effluent can be reused, we will be able to save industrial water and treat waste water at low cost.
As part of the investigation of the industrial waste water treatment, we experimentally studied how to recover the raw material in waste water from one of petroleum industry, Nylon (6) process.
We found that we could accomplish the waste water treatment at low cost on the following process.
High concentrated waste water was separated from low concentrated waste water and passed through the activated carbon column to adsorb the raw material, lactam.
Adsorbed monomer was desorbed with acetone and the activated cardon was regenerated with super heated steam.
The experiment was carried out on the laboratory scale and the pilot plant scale.View full abstractDownload PDF (1134K) -
Shimakichi Doi1973 Volume 52 Issue 7 Pages 618-624
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSUnder the condition that a power station could be set up in Miike -Where was the largest coal field in Japan-for the purpose of consuming the coal of Mitsui Mining Co. Ltd., Miike, Mitsui Aluminium Co. Ltd. have begun to smelt aluminium which required much electric energy.
Originally, because of contenting high sulfur and low melting point ash, the coal in Miike was criticized to be difficult to consume for boiler.
Accordingly, we had to solve the difficulty how to boil the low quality and high sulfur coal without raising clinker trouble and how to restrain to exhaust sulfur to the atmosphere.
Consequently the various investigations and scientific researches, and on top of that, running the pilot plant scaled 1/200 for a long time-many experiences and investigations of operating condition could be obtained during this test-we finally established this wet type sulfur removal process used carbide sludges in large capacity for coal fired power boiler-156MW scalr-for the first time in the world.
The distinctive feateres of this process are as follows:
1. Be possible to applicate reasonably in the limited space.
2. Low cost of construction and running.
3. Simple process and construction.
4. No secondary harm by-product and be able to retire it for plaster.
5. The absorbefacient Ca (OH) 2 can be gotten cheaply and stably.
6. High efficiency in removing sulfur and dust, and in operating continuously.
7. Stability against the variation of boiler load and sulfur content in the coal.
8. Suffieiently shut out bloaking by plaster scale which is criticized very difficult to keep away in wet process.
Fortunately our commercial plant is favorably running without trouble ever since starting up -March 1972- and the efficiency is high beyond of the original plan.
With this success in our undertaking, the coal in Miike could be consumed continuously in large quantities.View full abstractDownload PDF (852K) -
1973 Volume 52 Issue 7 Pages 630-636
Published: July 20, 1973
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (1008K)
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