JPH0832882B2 - Method for estimating apparent fluidity of non-caking coal - Google Patents
Method for estimating apparent fluidity of non-caking coalInfo
- Publication number
- JPH0832882B2 JPH0832882B2 JP1143508A JP14350889A JPH0832882B2 JP H0832882 B2 JPH0832882 B2 JP H0832882B2 JP 1143508 A JP1143508 A JP 1143508A JP 14350889 A JP14350889 A JP 14350889A JP H0832882 B2 JPH0832882 B2 JP H0832882B2
- Authority
- JP
- Japan
- Prior art keywords
- fluidity
- coal
- caking coal
- temperature
- apparent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title claims description 70
- 238000000034 method Methods 0.000 title claims description 20
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000004939 coking Methods 0.000 claims description 5
- 239000000571 coke Substances 0.000 description 8
- 238000007796 conventional method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、高炉に装入される製鉄用コークスを製造す
るための配合炭の配合成分としての、非粘結炭の見掛け
の流動度推定方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention estimates the apparent fluidity of non-caking coal as a blending component of blended coal for producing ironmaking coke to be charged into a blast furnace. It is about the method.
［従来技術］ 高炉に装入される高強度の製鉄用コークスを製造する
ためには、その原料として、粘結性と石炭化度とが適当
な範囲にある石炭を使用することが必要である。このよ
うな石炭は天然には少ないので、通常、性質の異なる十
数種類の石炭を配合して使用する。[Prior Art] In order to produce a high-strength coke for iron making that is charged into a blast furnace, it is necessary to use coal having a caking property and a degree of coalification within an appropriate range as a raw material thereof. . Since such coal is rare in nature, generally, dozens of types of coal having different properties are blended and used.
石炭の粘結性は、流動性、膨張性、および粘着性によ
って定まるが、特に流動性がコークス強度に大きく影響
する。The caking property of coal is determined by the fluidity, expandability, and stickiness, and the fluidity particularly has a great influence on the coke strength.
このために、配合炭の最高流動度（MF）を把握するこ
とは、高強度のコークスを製造するための重要な因子で
ある。Therefore, understanding the maximum fluidity (MF) of blended coal is an important factor for producing high strength coke.
従来、配合炭の最高流動度は、配合される単味の石炭
の各々の最高流動度の荷重平均値によって推定されてい
た。Conventionally, the maximum fluidity of blended coal has been estimated by the weighted average value of the maximum fluidity of each of the blended plain coals.
［発明が解決しようとする課題］ また特願昭−63−170569号に述べられているように、
配合される石炭の各々の流動度を数式化し、その対数値
の荷重平均によって、配合炭の流動度曲線の対数値を求
め、これに基づいて、配合炭の最高流動度を求める方法
が提案されている。[Problems to be Solved by the Invention] Further, as described in Japanese Patent Application No. 63-170569,
A method has been proposed to formulate the fluidity of each coal to be blended, calculate the logarithmic value of the fluidity curve of the blended coal by the weighted average of the logarithmic values, and to find the maximum fluidity of the blended coal based on this. ing.
しかしながら、従来技術における配合炭の最高流動度
の推定計算においては、配合される石炭の種別は粘結炭
であり、これが非粘結炭である場合には、流動度が全く
無いので、流動度を実験によって求めることは出来な
い。本発明は、上記の問題点を解決し、配合炭の最高流
動度の推定の根拠となり得る、非粘結炭の見掛けの流動
度推定方法を提案することをその目的とするものであ
る。However, in the estimation calculation of the maximum fluidity of blended coal in the prior art, the type of coal to be blended is caking coal, and when this is non-caking coal, there is no fluidity, so the fluidity is Cannot be obtained by experiment. An object of the present invention is to solve the above problems and propose an apparent fluidity estimation method for non-caking coal that can be the basis for estimating the maximum fluidity of blended coal.
［課題を解決するための手段］ 本発明にかかる非粘結炭の見掛けの流動度推定方法
は、見掛けの流動度の対数値を当該非粘結炭と粘結炭と
を含む配合炭の流動度の対数値と、当該粘結炭の流動度
の対数値との差として求め、これより見掛けの流動度を
求めることを特徴とするものである。また、上記方法に
おいて、非粘結炭と粘結炭とを含む配合炭の流動度及び
粘結炭の流動度を、流動開始温度、最高流動温度、固化
温度および最高流動度からそれぞれ数式化して求めるこ
とを特徴とするものである。また、前記配合炭および粘
結炭の流動度の対数値を、下記（１）〜（４）式によっ
て求める前記の方法による配合炭の見掛けの流動度推定
方法である。[Means for Solving the Problems] The apparent fluidity estimation method for non-caking coal according to the present invention is a method of calculating the logarithmic value of the apparent fluidity of a coal blend containing the non-caking coal and the coking coal. It is characterized in that the apparent fluidity is obtained from the difference between the logarithmic value of the degree and the logarithmic value of the fluidity of the caking coal. Further, in the above method, the fluidity of the coal blend containing the non-caking coal and the caking coal and the fluidity of the caking coal, the flow start temperature, the maximum flow temperature, the solidification temperature and the maximum fluidity, respectively It is characterized by seeking. Further, it is a method of estimating the apparent fluidity of the blended coal by the above method, which obtains the logarithmic value of the fluidity of the blended coal and the caking coal by the following formulas (1) to (4).
流動度開始温度（ST）から最高流動度温度（MFT）ま
での間の温度における流動度の対数値（ｙ）： 最高流動度（MFT）から固化温度（FT）までの間の温
度における流動度の対数値（ｙ）： 流動開始温度（ST）よりも前の温度における流動度の
対数値（ｙ）： 固化温度（FT）よりも後の温度における流動度の対数
値（ｙ）： 但し、MF:最高流動度、x:温度。Logarithmic value (y) of the fluidity at temperatures between the fluidity start temperature (ST) and the maximum fluidity temperature (MFT): Logarithmic value (y) of the fluidity at temperatures between the maximum fluidity (MFT) and the solidification temperature (FT): Logarithmic value (y) of the fluidity at a temperature before the flow start temperature (ST): Logarithmic value (y) of the fluidity at a temperature after the solidification temperature (FT): However, MF: maximum fluidity, x: temperature.
［作用］ 本発明における非粘結炭の見掛けの流動度の推定方法
は、非粘結炭に粘結炭を配合し、この配合炭の流動度を
実験によって求める。次に前記粘結炭の流動度を同じく
実験によって求め、両流動度の対数値を計算する。配合
炭の流動度の対数値から粘結炭の流動度の対数値を差し
引いて、非粘結炭の見掛けの流動度の対数値を求め、こ
の値から見掛けの非粘結炭の流動度を求める。[Operation] In the method of estimating the apparent fluidity of non-caking coal in the present invention, non-caking coal is mixed with caking coal, and the fluidity of this coal is determined by an experiment. Next, the fluidity of the caking coal is obtained by the same experiment, and the logarithmic value of both fluidities is calculated. Subtract the logarithmic value of coking coal flowability from the logarithmic value of blended coal to obtain the logarithmic value of apparent fluidity of non-caking coal. From this value, calculate the apparent fluidity of non-caking coal. Ask.
第１図は非粘結炭の見掛けの流動度を推定する方法を
示すグラフである。曲線Ａ、Ｂ、Ｃ、Ｃ、Ｄは下記の通
りである。横軸は温度、縦軸は流動度である。FIG. 1 is a graph showing a method for estimating the apparent fluidity of non-caking coal. Curves A, B, C, C and D are as follows. The horizontal axis represents temperature and the vertical axis represents fluidity.
A;粘結炭の流動度曲線 B;配合炭の流動度曲線 C;非粘結炭の流動度曲線 D;非粘結炭の見掛けの流動度曲線 Ａ、Ｂ、Ｃは実測値である。しかしＣが流動度を示さな
いので、横軸上の直線であり、ＣとＡよりＢを計算で推
定することは出来ない。そこでＡ、Ｂを測定し、Ａと加
えてＢとなるような見掛けの流動度曲線Ｄを計算する。
曲線Ｄは配合する石炭Ａの種類によっては変わらず、非
粘結炭の銘柄に固有のものである。A: Caking coal flow rate curve B; Blended coal flow rate curve C; Non-caking coal flow rate curve D; Non-caking coal apparent flow rate curve A, B and C are measured values. However, since C does not show fluidity, it is a straight line on the horizontal axis, and B cannot be estimated by calculation from C and A. Therefore, A and B are measured, and an apparent fluidity curve D that results in B in addition to A is calculated.
The curve D does not change depending on the type of coal A to be blended, and is unique to the brand of non-caking coal.
第２図は最高流動度とコークス強度との関係を示すグ
ラフである。横軸は流動度、縦軸はコークス強度（D
I15）をそれぞれ示す。第２図（ａ）は従来法、第２図
（ｂ）は本発明法による推定結果を示すものである。従
来法においては、各石炭の最高流動度の値を単に配合比
で配合炭の最高流動度を推定したものである。図示のよ
うに従来法においては、流動度における強度のバラツキ
が大きい。本発明法によれば、このバラツキは小さくコ
ークスの強度の管理が容易になる。FIG. 2 is a graph showing the relationship between maximum fluidity and coke strength. The horizontal axis is the fluidity and the vertical axis is the coke strength (D
I 15 ) respectively. FIG. 2 (a) shows the estimation result by the conventional method, and FIG. 2 (b) shows the estimation result by the method of the present invention. In the conventional method, the maximum fluidity value of each coal is estimated by simply using the maximum fluidity value of each coal as a blending ratio. As shown in the figure, in the conventional method, there are large variations in the strength of the fluidity. According to the method of the present invention, this variation is small and the strength of coke can be easily controlled.
［実施例］ 第１表は本発明の方法による非粘結炭の見掛けの流動
度の推定結果である。[Examples] Table 1 is an estimation result of apparent fluidity of non-caking coal by the method of the present invention.
第２表は粘結炭の流動度の測定結果である。 Table 2 shows the results of measuring the fluidity of coking coal.
第３表に第１表の石油コークスと第２表の粘結炭とを
配合した配合炭の最高流動度（MF）の実測値と本発明方
法による推定値とを示す。 Table 3 shows measured values of the maximum fluidity (MF) of the blended coal blended with the petroleum coke of Table 1 and the coking coal of Table 2 and the estimated value by the method of the present invention.
第２表に示すように、配合炭の最高流動度の測定値と
推定値とが良く一致している。 As shown in Table 2, the measured value and the estimated value of the maximum fluidity of the blended coal are in good agreement.
［発明の効果］ 以上のように、本発明によれば、非粘結炭の見掛けの
流動度の推定が可能となったので、非粘結炭を配合成分
とする配合炭の流動度、引いては、最高流動度の推定が
正確に行われ、この配合炭を使用する高炉の炉況が安定
する効果がある。[Effects of the Invention] As described above, according to the present invention, the apparent fluidity of non-caking coal can be estimated. As a result, the maximum fluidity can be accurately estimated, and the furnace conditions of the blast furnace using this coal blend can be stabilized.
第１図は非粘結炭の見掛けの流動度を推定する方法を示
すグラフ図、第２図は最高流動度とコークス強度との関
係を示すグラフ図である。FIG. 1 is a graph showing the method of estimating the apparent fluidity of non-caking coal, and FIG. 2 is a graph showing the relationship between the maximum fluidity and the coke strength.
Claims (3)
める方法であって、見掛けの流動度の対数値を当該非粘
結炭と粘結炭とを含む配合炭の流動度の対数値と、当該
粘結炭の流動度の対数値との差として求め、これより見
掛けの流動度を求めることを特徴とする非粘結炭の見掛
けの流動度推定方法。1. A method for obtaining the apparent fluidity of non-caking coal by estimation, wherein the logarithmic value of the apparent fluidity is a pair of the fluidity of blended coal containing the non-caking coal and the coking coal. A method for estimating the apparent fluidity of non-caking coal, which is characterized by obtaining a difference between a numerical value and a logarithmic value of the fluidity of the caking coal, and obtaining an apparent fluidity from the difference.
及び粘結炭の流動度を、流動開始温度、最高流動温度、
固化温度および最高流動度からそれぞれ数式化して求め
ることを特徴とする請求項１記載の非粘結炭の見掛けの
流動度推定方法。2. The fluidity of blended coal containing non-caking coal and caking coal and the fluidity of caking coal are determined by the flow start temperature, the maximum flow temperature,
The apparent fluidity estimation method for non-caking coal according to claim 1, wherein the fluidity is obtained by mathematically formulating from the solidification temperature and the maximum fluidity.
を、下記（１）〜（４）式によって求める請求項２記載
の配合炭の見掛けの流動度推定方法。 流動度開始温度（ST）から最高流動度温度（MFT）まで
の間の温度における流動度の対数値（ｙ）： 最高流動度（MFT）から固化温度（FT）までの間の温度
における流動度の対数値（ｙ）： 流動開始温度（ST）よりも前の温度における流動度の対
数値（ｙ）： 固化温度（FT）よりも後の温度における流動度の対数値
（ｙ）： 但し、MF:最高流動度,x:温度。3. The apparent fluidity estimation method for blended coal according to claim 2, wherein the logarithmic value of the fluidity of the blended coal and the caking coal is obtained by the following equations (1) to (4). Logarithmic value (y) of the fluidity at temperatures between the fluidity start temperature (ST) and the maximum fluidity temperature (MFT): Logarithmic value (y) of the fluidity at temperatures between the maximum fluidity (MFT) and the solidification temperature (FT): Logarithmic value (y) of the fluidity at a temperature before the flow start temperature (ST): Logarithmic value (y) of the fluidity at a temperature after the solidification temperature (FT): However, MF: maximum fluidity, x: temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1143508A JPH0832882B2 (en) | 1989-06-06 | 1989-06-06 | Method for estimating apparent fluidity of non-caking coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1143508A JPH0832882B2 (en) | 1989-06-06 | 1989-06-06 | Method for estimating apparent fluidity of non-caking coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH039991A JPH039991A (en) | 1991-01-17 |
| JPH0832882B2 true JPH0832882B2 (en) | 1996-03-29 |
Family
ID=15340363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1143508A Expired - Fee Related JPH0832882B2 (en) | 1989-06-06 | 1989-06-06 | Method for estimating apparent fluidity of non-caking coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0832882B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5820668B2 (en) * | 2011-09-01 | 2015-11-24 | 関西熱化学株式会社 | Method for estimating maximum fluidity of raw material for coke production, blending method for raw material for coke production, and raw material for coke production produced by the blending method |
| WO2016136191A1 (en) | 2015-02-25 | 2016-09-01 | Ｊｆｅスチール株式会社 | Method of evaluating coal and method of manufacturing coke |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5638386A (en) * | 1979-09-06 | 1981-04-13 | Sumitomo Metal Ind Ltd | Method of adjusting mixing proportion of coals for coke production |
| JPS62285051A (en) * | 1986-06-03 | 1987-12-10 | Mitsubishi Chem Ind Ltd | Fluidity measurement of coal |
-
1989
- 1989-06-06 JP JP1143508A patent/JPH0832882B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH039991A (en) | 1991-01-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |