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46 巻, 8 号
選択された号の論文の7件中1～7を表示しています
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伊能 泰治1967 年 46 巻 8 号 p. 567
発行日: 1967/08/20
公開日: 2010/06/28
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林 武志1967 年 46 巻 8 号 p. 568-581
発行日: 1967/08/20
公開日: 2010/06/28
ジャーナル フリーRecent progress of oven wall brick, especially “high density silica brick” developed in U. S. A. was introduced and discussed from the standpoint of a refractory producer.
High density silica brick aiming at the shortening of coking time through higher thermal conductivity can be obtained by the addition of titania, copper oxide or metallic silicon
However, it was recently found that some oven bricks used for a long period had considerably decreased in porosity and therefore increased by 40 percent in thermal conductivity. These phenomena were mainly due to the structural and chemical changes, which were investigated in detail.
The result gave a prospect to make high density silica brick with the porosity of as low as 20-17 percent by selecting raw materials and improving manufacturing procedures without any metallic additive. Physical properties of trial products are shown.抄録全体を表示PDF形式でダウンロード (3728K) -
城 博, 西 徹, 仲摩 博至1967 年 46 巻 8 号 p. 582-589
発行日: 1967/08/20
公開日: 2011/02/23
ジャーナル フリーEstablishment of a standard for the evaluation of the properties of metallurgical coke is regarded as so difficult that in no country such standard is yet firmly established. For the purpose of helping the establishment of the standard, we have studied the relationship among various property of coke and tried to generalize the properties, using past data.
As a result, the following basic concept was obtained, when the size and sulphur content of coke regarded as independent factors, for the evaluation of the other properties of coke:
Vc=f(S, M)/f(A)
Vc: index for the evaluation of coke properties
S: strength of coke (D15015 index)
M: micro strength index
A: ash content
It is concluded that studies that would take much more time are required for the determination of actual Vc, however, for the purpose of evaluating coke properties, adoption of micro-strength, in addition to strength and ash, would serve our purpose.抄録全体を表示PDF形式でダウンロード (738K) -
樫野 泰三, 和佐 昭1967 年 46 巻 8 号 p. 590-609
発行日: 1967/08/20
公開日: 2010/06/28
ジャーナル フリーSeveral methods for increasing bulk density of charge (i, e crushing by component, Oiling, Drying, Stamping, Loading after stamping) were compared, using many data obtained from 450mm wide 300kg test coke oven.
And the effect of the bulk density on productivity and characteristics of the coke were discussed.
And also the mechanism changing productivity and characterics of coke by increasing bulk density itself of charge were considered inductively.
Principal results are as follows
(1) Increasing bulk density of charge, at constant flue temperature, the produced cokebecome denser and coking time increase. But the increasing rate of coking time are less than that of the bulk desity, and the ratio of increasing rate about 0.5, so prductivity (B. D./C. T.) increase by increasing the bulk density and the ratio of increasing rate become also about 0.5.
Apparent specific gravity of coke increase nearly same rate with coking time
(2) The mechanism of changing productivity and characteristis of coke become clearer, if we consider them devided 2 stages as follows,
1st: The effect on increasing coke bulk density (_??_ Apparent Sp.Gr.) and decreasing shrinkage of coke in coking process.
2nd: Relation between,
Apparent sp.gr. and other characteristics of coke.
Apparent Sp.gr. and coking time.
These results are obtained from 300kg test coke oven's data in our laboratory, so, cannot slide to commersial oven simply, and then it needs attend to the difference on heating condition and compressive action in coking process each other, especially heating condition at oven top.抄録全体を表示PDF形式でダウンロード (2106K) -
乾留吉田 雄次, 熊井 順二郎, 山口 潔, 白石 稔, 戸田 雄三, 丸山 勝久1967 年 46 巻 8 号 p. 610-618
発行日: 1967/08/20
公開日: 2010/06/28
ジャーナル フリーIn order to develop a new process to make metallurgical coke from the blends mainly composed of non-or slightly caking, high volatile coals, hot briquetting followed by corbonisation has been carried out on a pilot scale.
This paper deals with the carbonisation of hot briquettes, of which manufacture was reported previously and given here some additional explanations.
The preliminary small scale tests on carbonising briquettes to seek the suitable conditions for obtaining hard fomed coke showed that the hot briquettes should be: 1) 24-32 per cent in volatile matter, 2) charged immediately into the oven without being cooled, 3) carbonised as slow as possible, until the temperature reaches about 600-700°C.
Based on these results, a pilot carboniser of travelling grate type with a capacity of 100kg/hr was constructed. The hot briquettes were carbonised to about 600-700°C in 1.5-2hr on the travelling grate, which is made of mild steel and 600mm wide, 3, 000mm long. Then, semi-carbonised briquettes were turned into the high temperature chamber, where they were rapidly carbonised to about 900°C. Heat required is supplied by combustion of the gas evolved from the briquettes.
The resulting formed coke has the drum index of 80% which is lower by 10% than that obtained by a small scale test.抄録全体を表示PDF形式でダウンロード (1135K) -
吉田 晋1967 年 46 巻 8 号 p. 619-628
発行日: 1967/08/20
公開日: 2011/10/21
ジャーナル フリーResults of the test, using the dried charging coal on conventional coke ovens, were published by 3 authors at The 43rd Coke Special Meeting of The Fuel Society of Japan on April 13, 1967. These were following;
1) “Test of the dried charging coal”
Kawatetsu Chemical Industry Co., Ltd. T. Yamane et al.
2) “Manufacturing of B. F. coke used of the dried coal”
Japan Steel & Tube Corp.Mr. M. Mizuno et al.
3) “Manufacturing test of B. F. coke used of the dried charging coal”
Fuji Iron & Steel Co. Mr. C. Kishi et al.
In the present paper these reports have been made an abstract and introduced summarily by permissions of authors. When the charging coal has been dried to about 4% water content, there are following predominances,
1) Shortening of the coking time (2-10%).
2) Increasing of the productivity of coke oven (6-16%).
3) Coke strength become to stronger.
4) Saving of the strong caking coal.
5) Saving of the coking calorie.
6) Economical advantage.
7) Easifying of the temperature-control and management of coke oven.
But large scale dryer and coal dust trouble must be solved.
Generally speaking, the dried coal carbonisation process shall be able to use practi-caly for many commercial coke oven plants in Japan.抄録全体を表示PDF形式でダウンロード (996K) -
1967 年 46 巻 8 号 p. 637-641
発行日: 1967/08/20
公開日: 2010/06/28
ジャーナル フリーPDF形式でダウンロード (692K)
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