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Volume 31, Issue 1-2
Displaying 1-19 of 19 articles from this issue
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 1
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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1952 Volume 31 Issue 1-2 Pages plate1-plate2
Published: February 29, 1952
Released on J-STAGE: May 16, 2013
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 3
Published: February 29, 1952
Released on J-STAGE: May 16, 2013
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 3a-4
Published: February 29, 1952
Released on J-STAGE: May 16, 2013
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Yoshitake Sasaki1952 Volume 31 Issue 1-2 Pages 4-11
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSIn view of the autarchy problem of Japanese economy and Japan-U.S. economic co-Operation, the author described the economical conditions in Japan and the future progress. In connection with, these points he also described what demands should be emphasized. for the coal. mining industry in Hokkaido and what movement of Japanese economy must follow to the ceasefire in Korea.
Owing to stopping of the aid-Japan fund from U.S.A., the Government planned and enforced the nine-point economic stabilization program, it was explained. Furthermore, on to-day's international situation, the economical.co-operation plans between Japan and U.S.A. were considered.
Lastly, the author described that the increased production of weakly-coking coal and.the reduction of coal price, which were very important for the industrial devel-opment of Hokkaido, were strongly demanded from the coal mining industry in Hokkaido.View full abstractDownload PDF (1604K) -
Shizuo Tsurumi1952 Volume 31 Issue 1-2 Pages 11-15
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe production of Hokkaido coal was 11, 460, 000 t in, 1950. fiscal war which corresponded to 30% of the total production in Japan. Coking .coal was 21% and gas-producer coal was 7% of the total. About a half of Hokkaidd coal-73%, coking coal, 64%, gas-producer coal and 26%, burning coal-was consumed outside of Hokkaido. With respect to the consumption districts, ratios of Hokkaido coal to the total sum of coals used in each distriet were as follows;37% in Kanto, 24% in Tokai, 10% in Kinki, 88% in Niigata, 24% in Tokai, and 55%. in Hokuriku. However as regard to coking coal Hokkaido coal took higher proportion; 70-80% of the coal for metallurgical industries, gas industries and related industries in Kanto-Tohoku district depended upon Hokkaido coal.View full abstractDownload PDF (891K) -
Toshio Yoshioka1952 Volume 31 Issue 1-2 Pages 15-21
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe demand for electric power in Japan was 46, 300, 000, 000 kWh in 1950, about twice of that in 1930. Recently the rate of yearly increase of the demand is about 10 per cent. The capacities of power stations are 37, 000, 000, 000 kWh, therefore the shortage is very serious in winter. It is expected to supply the cheap, electric power more stably by the construction of reservoirs and dams or by the operation of coal power stations. The budget for the electricity development plan which started in 1949 is 10, 000 million yen a year but still insufficient to accomplish the plan. In Hokkaido we can not get cheap and enough power owing to its geographical and poor industrial situations. To solve this matter it is hoped to develop abundant natural reservoir and, in coal fields, to use low grade coals.View full abstractDownload PDF (1605K) -
[in Japanese]1952 Volume 31 Issue 1-2 Pages 22
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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Mikiji Kaharu1952 Volume 31 Issue 1-2 Pages 23-26
Published: February 29, 1952
Released on J-STAGE: October 21, 2011
JOURNAL FREE ACCESSThe iron industry in Japan has been reconstructed beyond expecta-tion since the end of the World War II and all the present installations are preumed to come shortly into full operation. At that time the yearly production of pig iron will amount to 5, 000, 000 t and coking coal required 7, 700, 000 t. From technical and economical view points of blast furnace operations, the coke is required to have high strength, low ash-content as well as superior chemical properties. Though the claim to the strength of coke has been fairly reduced by the sizing of ore, 3, 060, 000 t of foreign strongly-coking coals will be still necessary. The following methods for improving the coke quality are now in practice or under consideration; (1) prep-aration of coal charged, (2) blending of foreign strongly-coking coals and (3) blending of fine semi-coke, coke or other materials. With development of these methods, it is expected to produce coke from the resources we have or shall have in near future.View full abstractDownload PDF (920K) -
Matake Kurokawa1952 Volume 31 Issue 1-2 Pages 27-33
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSCoal preparation forms the basis of effective use of coal wealth and promotion of heat economy. Namely, the economical preparation of suitable and efficacious coal realize the purpose of coal preparation. In promotion of coal prepar-ation with satisfaction of producer as well as consumer, the following three points should be taken into consideration
(1) Minimum-fitting coal preparation to specification for the use,
(2) Maximum utilization of energy maintained in coal with rewashing the refu-se from the primary washing, and
(3) Effective application of middling and submiddling materials at the mine or the district,
These three matters and the utilization of fine coal are described practically giving examples.View full abstractDownload PDF (1350K) -
Shun-ichi Uchida1952 Volume 31 Issue 1-2 Pages 34-37
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSThe development of chemical industry has greatly depended upon coal. In Japan, various industries have been based on Kylishil coals and there are conseq-uently much more handicaps for Hokkaido coals which are transported from a long distance to compete with Kyrishil coals. Therefore it must be considered for the pre-sent that only higher grade coals should be transported to industrial zones and lower grade coals be utilized effectively in Hokkaido. Then, discussing the suitabil-ity of chemical industries to the circumstance of Hokkaido, the author suggested what kind of chemical industry was suited to Hokkaido.View full abstractDownload PDF (770K) -
1952 Volume 31 Issue 1-2 Pages 39-55
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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1952 Volume 31 Issue 1-2 Pages 56-69
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 75-77
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 77-78
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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1952 Volume 31 Issue 1-2 Pages 79
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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[in Japanese]1952 Volume 31 Issue 1-2 Pages 80
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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1952 Volume 31 Issue 1-2 Pages 81-83
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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1952 Volume 31 Issue 1-2 Pages 83-85
Published: February 29, 1952
Released on J-STAGE: June 28, 2010
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