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50 巻, 8 号
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勝屋 彊1971 年 50 巻 8 号 p. 621
発行日: 1971/08/20
公開日: 2010/06/28
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昭和46年4月21目第51回コークス特別会講演毛利 春夫, 黒木 正章, 小倉 正雄, 鳴島 柾二, 林山 泰三, 八崎 八代栄1971 年 50 巻 8 号 p. 622-633
発行日: 1971/08/20
公開日: 2010/06/28
ジャーナル フリーWe attempted the application of the petrogaphic method to the production of the boundry coke.
Informations obtained are as follows.
1) It is impossible to predict the foundry coke strength by the index and iso-coke strength line obtained by Schapiro.
2) The reason why iso-coke strength line obtained by Schapiro cannot apply to the prediction of the foundry coke strength is based on the difference between the carbonization process of the foundry coke and that of the iron coke.
Especially it was shown that a portion of vitrinite of high rank coal reacted as inerts by the quantitative analysis of anisotropic texture about the foundry coke.
3) We made Optimum Reactives/Inarte Ratio and Rank Index for prediction of the foundry coke by micro coke oven's data, and drew up the iso-DI3015 lines for prediction of the foundry coke by the petrographic analysis and 250kg coke oven's data, about many kinds of individual coal and blend coal.
4) It is possible to estimate the microchemical analysis values such as the volatile matter, fixed carbon and free swelling index, and the coking properties of coal by mean maximum reflectance of vitrinite.
5) It is able to check the noncoking coal such as weathed coal and oxidized coal by using the corelation between mean maximum refletaace and free swelling index or maximum dilatation of dilatometer test.抄録全体を表示PDF形式でダウンロード (1276K) -
昭和46年4月21日第51回コークス特別会講演太田 満喜雄, 大岩 博1971 年 50 巻 8 号 p. 634-644
発行日: 1971/08/20
公開日: 2010/06/28
ジャーナル フリーOn the drum test for the measurement of the strength of coke, the effects of the sampling spot, the size distribution of specimen and the number of drum revolution were studied.
The sampling spot gives the largest effect on the drum test value. The sample from nesrest spot to the charger of coke into the blast furnace is best for the measuement of the strength of coke which is closely related to the operation of blast furnace. There happenes to be some bias by term or by plant in the relation between the drum test value measured on the sample from front of the wharf (or after the cutter) and from before the blast furnace.
When the sample from front of the wharf is only available, the D'IR'-R+R'x method is recommendable which eliminates the impact history of specimen and the variation of pattern in the crushing curve.
The drum test values measured on various sizes of specimen are closely related each other and accurately converted in comparison. However the breeze contained sample is recomendable to simply estimate the aceurate size dislribation of coke in blast furnace which governs the permeability.
The drum test values measured on various numbers of drum revolution are closely related as far as the sampling spot is fixed, and the number of drum revolution may be chosen by the purpose.抄録全体を表示PDF形式でダウンロード (1491K) -
昭和46年4月21日第51回コークス特別会講演井田 四郎, 西 徹, 仲摩 博至1971 年 50 巻 8 号 p. 645-654
発行日: 1971/08/20
公開日: 2011/02/23
ジャーナル フリーThis research was performed for the purpose of establishing valuation of characteristic of coke. The usual research on the behavior of coke in B.F. had many indistinct things because of inaccurate sampling methods. Higashida No.5 B.F. at Yawata Iron and Steel Works was quenched by 3800 tons of water in normal operating conditions, broken and the sample was picked from each part of B.F. and the behavior of coke in B.F. was measured.
(1) Behavior of coke in B.F. was changed from the middle of shaft, especially, this change of characteristic of coke in shaft was influenced with alkali materials.
(2) The characteristic of coke in softening and melting zone was showed the quick chang- es and it tuyere zone was showed considerable changes.
(3) The changes of characteristic of coke in the wall side part was larger than other parts.
(4) Desulphurization of cokes began from the lower of shaft and sulphur of cokes in tuyere zone was desulphurized about 30%.
As a result, we think that we are going to make clear the behavior of coke in shaft, softening, meltimg and tuyere zone on the bench scall experiment and we must establish the method of valuation of characteristic of coke on the base of this result.抄録全体を表示PDF形式でダウンロード (1119K) -
成形炭の炭化過程における収縮係数の変化熊井 順二郎, 山口 潔, 丸山 勝久, 豊田 貞治1971 年 50 巻 8 号 p. 655-663
発行日: 1971/08/20
公開日: 2010/06/28
ジャーナル フリーFrom the point of view of the properties of heat shock the coefficient of contraction during carbonization process was investigated by changing coal rank, forming temperature, pre-heating condition, treatment temperature of non-coking coal, heating rate and so on.
The coefficient of contraction shows the first and the second maxima, respectively at about 500°C and 800°C. The value of the first maximum becomes larger with the increase of volatile matter, although the maximum disappears in case of the coal with carbon content more than 90%.
The value of the second maximum is almost independent of the rank of coal, 3-4.5×10-4. And higher temperature during forming green briquette makes the coefficient of contraction smaller. In the case of pre-heating treatment, the highest temperature affects the properties of formed coke more than the time hold. In the case of two fluidized beds-type it was found that higher treatment temperature affects the maxima of the coefficient of contraction, especially the second maximum value, and the heating rate also affects considerably. From the experimental results including the value of thermal stress deduded from the coefficient of contraction, it was found that in order to endure heat shock under the temperature 1000°C the briquette is required to have the maximum value of the coefficient of contraction being smaller than 3×10-4. Then pre-heating treatment is desired and the temperature is to be at least 700°C.抄録全体を表示PDF形式でダウンロード (1291K) -
昭和46年4月21日第51回コークス特別会講演桐谷 義男1971 年 50 巻 8 号 p. 664-675
発行日: 1971/08/20
公開日: 2010/06/28
ジャーナル フリーRecently, Japan has made remarkable technical progress in iron & steel industry, and near future, gigantic blast furnaces, such as 10, 000t/D pig will be constructed.
So, it is demanded to tie up with these B. F to develope the giant-scale coke ovens with higher productivity.
Since '61, we have gradually enlarged from 4 m height to 6 m height, and been operating at Wakayama Works.
By the analysis of various conditions and the operating experience at Wakayma, we designed and errected at Kashima New Works, the giant-scale coke battery, with 180 ovens, named Koppers-Sumitomo Type, one of the world-largest, with 7, 125mm height, 460mm width, 16, 500mm length, 48.3m3 in effective chamber volume.
Besides, it has many specific charactors, i.e., vertical uniform heating system, carbon deposit control system, and etc.
We are now keeping the smooth operation with 17.1hr coking time, since the starting up on 6 th, January, '71.抄録全体を表示PDF形式でダウンロード (1708K) -
昭和46年4月21日第51回コークス特別会講演松下 太郎1971 年 50 巻 8 号 p. 676-685
発行日: 1971/08/20
公開日: 2010/06/28
ジャーナル フリーA plan is now underway, in which Canadian coal is transported in slurry form through a pipeline from the mine site to the shipping port for a distance of about 500 miles over the Canadian Locky Mountains.
Various experiments and operating furnace tests have been prepared, and the presence and site investigation has been raquested to Japan. An investigating mission was accordingly organized with members from six companies related with iron and steel production. This mission has visited Canada and the United States for the purpose of this investigation. This is the roport of an outline of this investigation.
(1) Adjustment and transportation of slurry
Operating results are now already available in the United States as to coal for electricity, and no problem is therefore anticipated in the industrial application.
(2) Dehydration and recovery
The newly developed dehydration technique based on the oil mixing without a thermal dryer is a real novelty and is considered to have very high economic advantages, except for the problem of industrialization left for future study.
(3) Handling of recovered coal
This technology may have undesirable effect on storage, dust, odor and conveyor belt. It would be necessary to carry out tests to avoid conceivable inconveniences.
(4) Coking property
It is necessary to confirm the kinds of slurry to be transported in general, and to conduct suffcient tests of weathering.
(5) Operation of coke ovans
The present test is not sufficient. It is necessary to carry a long-term test.
(6) Economic advantages
Economic advantages of this technology for electric coal have already been proved, but a comprehensive examination is necessary.
In spite of these problems not as yet solved, this project may bring technical and economic merits to Japan, and it is recommendable to push further research and devel-opment positively as part of the Canadian coal development program.抄録全体を表示PDF形式でダウンロード (1408K)
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