Title:
A valuation method of the degree of weathering of coal, a valuation method of the coking nature of weathering coal, a controlling method of the degree of weathering of coal, and a manufacturing method of corks
Document Type and Number:
Japanese Patent JP6044708
Kind Code:
B2
Abstract:
Provided are, by using an index with which the influence on the strength of coke can be evaluated, a method for evaluating a weathering degree of coal and a coking property of weathered coal within the ranges in which the weathering degree and coking property cannot be determined by using conventional methods, and a method for controlling the weathering degree of coal with which it is possible to add weathered coal to a coal blend to be used for producing coke without decreasing the strength of coke by using the index. The weathering degree of coal is evaluated by using the surface tension of semicoke which is prepared by performing a heat treatment on weathered coal as an index. Moreover, the surface tension of each brand of semicoke which is prepared by performing a heat treatment on each of the plural brands of coal included in coal stock is previously determined. In addition, the proportion of each brand of coal to the whole coal stock is also previously assessed. The weathering degree of each brand of coal is controlled so that the interfacial tension ³ inter of a semicoke blend which is prepared by blending the plural brands of semicoke in accordance with the proportions is 0.03 mN/m or lower.
Inventors:
Kaku Hiroyuki
An mansion Takashi
Kiyoshi Fukada
Yusuke Doi
Hidekazu Fujimoto
Izumi Shimoyama
An mansion Takashi
Kiyoshi Fukada
Yusuke Doi
Hidekazu Fujimoto
Izumi Shimoyama
Application Number:
JP2015511113A
Publication Date:
December 14, 2016
Filing Date:
April 08, 2014
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
G01N33/22; C10B57/00; C10B57/04
Domestic Patent References:
| JP2012211332A | 2012-11-01 | |||
| JP2005281355A | 2005-10-13 | |||
| JP3302446B2 | 2002-07-15 |
Other References:
JPN6014029559; Ｄ．Ｗ．Ｆｕｅｒｓｔｅｎａｕ，Ｊｉａｎｌｉ Ｄｉａｏ: Ｃｏａｌ Ｐｒｅｐａｒａｔｉｏｎ Ｖｏｌ．１０, 1992, Ｐ．１-１７
JPN6014029559; Ｄ．Ｗ．Ｆｕｅｒｓｔｅｎａｕ，Ｊｉａｎｌｉ Ｄｉａｏ: Ｃｏａｌ Ｐｒｅｐａｒａｔｉｏｎ Ｖｏｌ．１０, 1992, Ｐ．１-１７
JPN6014029559; Ｄ．Ｗ．Ｆｕｅｒｓｔｅｎａｕ，Ｊｉａｎｌｉ Ｄｉａｏ: Ｃｏａｌ Ｐｒｅｐａｒａｔｉｏｎ Ｖｏｌ．１０, 1992, Ｐ．１-１７
Attorney, Agent or Firm:
Isomura Tetsuro
Shigeru Inoue
Kazuhiro Mori
Shigeru Inoue
Kazuhiro Mori