JP2520539B2 - Manufacturing method of molding coke for metallurgy - Google Patents
Manufacturing method of molding coke for metallurgyInfo
- Publication number
- JP2520539B2 JP2520539B2 JP4074240A JP7424092A JP2520539B2 JP 2520539 B2 JP2520539 B2 JP 2520539B2 JP 4074240 A JP4074240 A JP 4074240A JP 7424092 A JP7424092 A JP 7424092A JP 2520539 B2 JP2520539 B2 JP 2520539B2
- Authority
- JP
- Japan
- Prior art keywords
- coke
- gas
- temperature
- high temperature
- heating
- 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 - Lifetime
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、石炭とバインダーを混
練してブリケットとした成型炭を竪型シャフト炉で低温
および高温ガスにより２段加熱して乾留した後冷却する
事により冶金用成型コークスを製造する方法に係わるも
のであり、その際シャフト炉内で発生する成型コークス
の割れを抑制する方法に関する。FIELD OF THE INVENTION The present invention relates to a molding coke for metallurgy by heating molded charcoal made into briquettes by kneading coal and a binder in a vertical shaft furnace by two stages of low temperature and high temperature gas to dry distillation and then cooling. The present invention relates to a method of manufacturing a coke, and to a method of suppressing cracking of a molding coke generated in a shaft furnace at that time.
【０００２】[0002]
【従来の技術】石炭より冶金用コークスを製造する方法
としては、石炭炭化室と燃料ガス燃焼室を別個に保有す
る室炉式コークス炉による方法が一般的に行なわれてい
る。2. Description of the Related Art As a method for producing metallurgical coke from coal, a method using a chamber furnace type coke oven having a coal carbonization chamber and a fuel gas combustion chamber separately is generally carried out.
【０００３】しかし、この方法では、石炭乾留時に発生
した副産物の外部漏洩による環境汚染が懸念されてお
り、且つバッチ式操業のため生産性が低い事や使用石炭
として大量の粘結炭が必要な事が欠点とされている。However, according to this method, environmental pollution due to external leakage of by-products generated during coal carbonization is concerned, and productivity is low due to batch operation, and a large amount of coking coal is required as coal to be used. Things are said to be a drawback.
【０００４】近年、これらの問題点を解消するための冶
金用成型コークスの製造方法として、竪型シャフト炉を
用い、低温および高温の循環熱媒ガスによる２段加熱を
行ない、成型炭を乾留して成型コークスを製造する冶金
用成型コークスの製造方法が開発されている（例えば特
公昭６０−３８４３７号公報参照）。In recent years, as a method for producing a molding coke for metallurgy to solve these problems, a vertical shaft furnace is used to perform two-stage heating with a low-temperature and high-temperature circulating heating medium gas, and dry-cook the coal. A method for producing a molded coke for metallurgy has been developed (see Japanese Patent Publication No. 60-38437).
【０００５】この方法は完全密閉化が可能であり、且つ
連続式生産方法である事、石炭を事前にブリケッテング
する為非粘結炭を大量に使用可能である事からその実機
化が期待されている。This method is expected to be put to practical use because it can be completely sealed and is a continuous production method, and since it can briquette coal in advance, it can use a large amount of non-caking coal. There is.
【０００６】この成型コークス製造にあたっては、２０
０ｔ／Ｄのパイロットプラントが建設されていて、安定
した生産が可能であり、かつ製造された冶金用コークス
は従来の室炉によるものに遜色のない強度を持つことが
認められている。In the production of this molded coke, 20
It is recognized that a 0t / D pilot plant has been constructed, stable production is possible, and the produced metallurgical coke has strength comparable to that of the conventional chamber furnace.
【０００７】公開された報告として、米国鉱工業連盟
（ＡＩＭＥ）１９８６年ｉｒｏｎ−ｍａｋｉｎｇ ｃｏ
ｎｆｅｒｅｎｃｅでの講演「Ｄｅｖｅｌｏｐｍｅｎｔ
ｏｆＦｏｒｍｅｄ Ｃｏｋｅ Ｐｒｏｃｅｓｓ」等があ
る。As a published report, the Federation of American Industries and Industries (AIME) 1986 iron-making co.
Lecture "Development at nference
of Formed Coke Process ”and the like.
【０００８】この成型コークスの製造方法を実際の生産
設備として採用する場合には、その経済効果をより大き
くするため、設備費用の低減を図ることが重要である。When adopting this method for producing molded coke as an actual production facility, it is important to reduce the facility cost in order to further increase the economic effect.
【０００９】実際上、この設備で大きな範囲を占めてい
るのは、冷却され精製された発生ガスを再度加熱して約
６５０℃の低温吹込みガスおよび約１０００℃の高温吹
込みガスを製造する熱風発生設備であり、その中でこと
に高温加熱設備は加熱温度が高いことから燃焼炉と蓄熱
炉よりなる非常に大型かつ複雑な設備とならざるをえな
い。In practice, the major area of this equipment is to reheat the cooled and refined evolved gas to produce a cold blow gas of about 650 ° C. and a hot blow gas of about 1000 ° C. Since it is a hot air generating facility, and in particular, the high temperature heating facility has a high heating temperature, it must be a very large and complicated facility consisting of a combustion furnace and a heat storage furnace.
【００１０】従って、高温吹込みガスの温度を低下せし
め、加熱設備の簡略化を図ることが必要と認識されてい
る。Therefore, it has been recognized that it is necessary to reduce the temperature of the hot blown gas to simplify the heating equipment.
【００１１】図１は竪型シャフト炉による成型コークス
製造プロセスを示す模式図である。１はブリケット装入
装置、２はシャフト上部乾留室、３はシャフト下部冷却
室、４は成型コークス排出口、５は低温加熱ガス吹込み
羽口、６は高温加熱ガス吹込み羽口、７は冷却ガス吹込
み羽口、８は昇温ガス抜き出しダクト、９は炉頂部循環
ガス抜き出しダクト、１０，１１は循環ガス冷却器、１
２は低温吹込みガス加熱器、１３は高温吹込みガス加熱
器を各々示す。FIG. 1 is a schematic view showing a molding coke manufacturing process using a vertical shaft furnace. 1 is a briquette charging device, 2 is a shaft upper distillation chamber, 3 is a shaft lower cooling chamber, 4 is a molding coke discharge port, 5 is a low temperature heating gas blowing tuyere, 6 is a high temperature heating gas blowing tuyere, and 7 is Cooling gas blowing tuyere, 8 is a temperature rising gas extraction duct, 9 is a furnace top circulating gas extraction duct, 10 and 11 are circulating gas coolers, 1
Reference numeral 2 denotes a low temperature blown gas heater, and 13 denotes a high temperature blown gas heater.
【００１２】[0012]
【発明が解決しようとする課題】本発明者らは、高温加
熱ガス温度の低下に関する種々の実験を高温ガス温度９
００℃〜６００℃にて小型電気炉でのブリケットの加熱
乾留により実施した。The inventors of the present invention have conducted various experiments relating to the decrease in the temperature of the hot gas at a high temperature.
It was carried out by heating and dry distillation of briquettes in a small electric furnace at 00 ° C to 600 ° C.
【００１３】その結果、予期しなかったことであるが、
加熱温度の低下とともに製品成型コークスの割れが大幅
に増加する現象が見られた。As a result, unexpectedly,
A phenomenon was observed in which cracks in the product molding coke increased significantly as the heating temperature decreased.
【００１４】発明者らは、成型コークスの割れ状況より
原型成型コークスに発生した大亀裂の本数を算定した。
この亀裂本数とそれに対する高温ガス温度の測定結果を
表１に示す。ガス温度が９００℃を下回ると成型コーク
スには大亀裂が１．５から２本入ることが判明した。The inventors calculated the number of large cracks generated in the prototype molded coke from the cracking condition of the molded coke.
Table 1 shows the number of cracks and the measurement results of the high temperature gas temperature corresponding thereto. It was found that 1.5 to 2 large cracks were formed in the molding coke when the gas temperature fell below 900 ° C.
【００１５】[0015]
【表１】 [Table 1]
【００１６】一般にコークスに発生し、割れに至る大き
い亀裂は、石炭が加熱されて３５０℃〜５００℃での軟
化溶融相を過ぎ、再度固化した後、約７５０℃迄加熱す
るうちに急速な脱ガスが起こり、体積が収縮する際に生
成すると解釈されている。しかし、この観点からは高温
加熱ガス温度の低下による成型コークス内での大亀裂の
発生は説明出来ない。In general, large cracks that occur in coke and lead to cracks are rapidly delaminated by heating coal to a temperature of about 750 ° C. after passing through the softening and melting phase at 350 ° C. to 500 ° C. and solidifying again. It is understood that gas evolves as it occurs and the volume contracts. However, from this point of view, the occurrence of large cracks in the molding coke due to the decrease in the temperature of the hot gas cannot be explained.
【００１７】本発明は、低温ガス及び高温ガスにより２
段加熱を行なう竪型シャフト炉を用いた成型コークス製
造プロセスにおいて、高温吹込みガス温度を低下させて
も亀裂が発生しない冶金用成型コークスの製造方法を提
供することを目的とする。The present invention uses two types of low-temperature gas and high-temperature gas.
An object of the present invention is to provide a method for producing a metallurgical molded coke in which cracks do not occur even when the temperature of a high temperature blown gas is lowered in a molded coke manufacturing process using a vertical shaft furnace that performs stepwise heating.
【００１８】[0018]
【課題を解決するための手段】本発明は、竪型シャフト
炉内上部で成型炭を低温および高温羽口から吹込む熱媒
ガスにより加熱してコークス化し、かつ竪型シャフト炉
内下部において上部で得られた高温コークスを冷却用ガ
スにて冷却して冶金用成型コークスを製造する冶金用成
型コークスの製造方法において、高温羽口から吹込むガ
スの温度を７５０〜８５０℃とし、かつコークス冷却速
度を２００℃／Ｈｒ以下とすることを特徴とする。According to the present invention, in the upper part of a vertical shaft furnace, the formed coal is heated by a heat medium gas blown from low-temperature and high-temperature tuyeres to form coke, and in the lower part of the vertical shaft furnace, an upper part is formed. In the method for producing a molding coke for metallurgy, in which the high temperature coke obtained in step 1 is cooled with a cooling gas to produce a molding coke for metallurgy, the temperature of the gas blown from the high temperature tuyere is 750 to 850 ° C., and the coke cooling is performed. It is characterized in that the speed is 200 ° C./Hr or less.
【００１９】[0019]
【作用】以下、本発明を作用とともに詳細に説明する。The operation of the present invention will be described in detail below.
【００２０】発明者らは、この高温吹込み加熱ガスの温
度を低下させたときに亀裂を発生する現象が、高温加熱
ガス温度低下によるコークス基質強度の低下及びシャフ
ト下部冷却室における高温成型コークスの冷却による熱
応力の発生により支配されていると推定した。The inventors have found that the phenomenon of cracking when the temperature of the high temperature blown heating gas is lowered is that the strength of the coke substrate is lowered due to the temperature drop of the high temperature heating gas and that the high temperature molding coke in the lower cooling chamber of the shaft is It is presumed that it is controlled by the generation of thermal stress due to cooling.
【００２１】図２に高温ガス加熱温度低下時のコークス
基質強度（マイクロストレングス）の変化を示す。FIG. 2 shows changes in the coke substrate strength (microstrength) when the heating temperature of the high temperature gas is lowered.
【００２２】又、上の推定を実証するため、高温成型コ
ークスの冷却速度を低下せしめ、割れに至る大亀裂の発
生の変化を測定した。Further, in order to verify the above estimation, the cooling rate of the high temperature molding coke was reduced and the change in the generation of large cracks leading to cracking was measured.
【００２３】表２および図３に結果を示すが、冷却速度
の低下により大亀裂の発生は大幅に減少することが明ら
かである。The results are shown in Table 2 and FIG. 3, and it is clear that the occurrence of large cracks is significantly reduced due to the decrease in cooling rate.
【００２４】[0024]
【表２】 [Table 2]
【００２５】これらの実験結果より、成型コークス製造
設備を簡略化するための高温加熱ガス温度の低下を可能
とするためには、シャフト炉下部の冷却速度を調整する
ことが必要であるとの本発明を得たものである。From these experimental results, it is necessary to adjust the cooling rate of the lower part of the shaft furnace in order to reduce the temperature of the high-temperature heating gas for simplifying the molding coke manufacturing equipment. It was the invention.
【００２６】まず、発明者らは想定される高温加熱ガス
温度域として、コークスがセミコークスとなる７５０℃
以上かつ設備簡略化が可能な８５０℃以下を発明の対象
とした。First, the inventors of the present invention assumed a high temperature heating gas temperature range of 750 ° C. where coke becomes semi-coke.
The above is the object of the invention at 850 ° C. or lower at which equipment can be simplified.
【００２７】その上で、実測試験結果からその温度域で
成型コークスの大亀裂発生を抑制し得る冷却速度として
２００℃／Ｈｒ以下が必要条件であると判断し本発明を
完成させたものである。Further, from the results of the actual measurement test, it was judged that a cooling rate of 200 ° C./Hr or less is a necessary condition for suppressing the generation of large cracks in the molding coke in that temperature range, and the present invention has been completed. .
【００２８】[0028]
【実施例】図３に、竪型シャフト炉内上部で成型炭を低
温および高温羽口から吹込む熱媒ガスにより加熱してコ
ークス化し、かつ竪型シャフト炉内下部において上部で
得られた高温コークスを冷却用ガスにて冷却して冶金用
成型コークスを製造する際に、本発明を実施した場合
（冷却速度１００℃及び２００℃）を比較例（冷却速度
１２００℃）とともに示す。EXAMPLE FIG. 3 shows that in the upper part of the vertical shaft furnace, the briquette is heated by the heat medium gas blown from the low temperature and high temperature tuyeres to form coke, and in the lower part of the vertical shaft furnace, the high temperature obtained at the upper part is obtained. A case where the present invention is carried out (cooling rate of 100 ° C. and 200 ° C.) when the coke is cooled with a cooling gas to produce a molding coke for metallurgy is shown together with a comparative example (cooling rate of 1200 ° C.).
【００２９】これから、本発明の実施により成型コーク
ス内の亀裂発生が抑制されることがわかる。From this, it is understood that the practice of the present invention suppresses the occurrence of cracks in the molding coke.
【００３０】[0030]
【発明の効果】図１において高温ガス吹込み羽口でのガ
ス温度を従来の１０００℃から８００℃前後に低下せし
めることにより、高温吹込みガス加熱器１３は従来の燃
焼炉と蓄熱炉により構成される非常に大型かつ複雑な設
備から、例えば連続式換熱器へ簡略化が可能となる。As shown in FIG. 1, by lowering the gas temperature at the tuyere of the high-temperature gas injection from the conventional temperature of 1000 ° C. to around 800 ° C., the high-temperature gas injection heater 13 is composed of the conventional combustion furnace and heat storage furnace. It becomes possible to simplify from a very large and complicated equipment to be used, for example, to a continuous heat exchanger.
【図１】竪型シャフト炉による成型コークス製造プロセ
スの模式図。FIG. 1 is a schematic view of a molding coke manufacturing process using a vertical shaft furnace.
【図２】加熱用高温ガス温度と成型コークスのマイクロ
ストレングスの関係を示す図。FIG. 2 is a diagram showing a relationship between a high temperature gas for heating and a microstrength of a molding coke.
【図３】冷却速度を変化させた場合の加熱用高温ガス温
度と成型コークス内大亀裂発生本数の関係を示す図。FIG. 3 is a diagram showing the relationship between the temperature of a high temperature gas for heating and the number of large cracks in a molding coke when the cooling rate is changed.
１…ブリケット装入装置 ２…シャフト上
部乾留室 ３…シャフト下部冷却室 ４…成型コーク
ス排出口 ５…低温加熱ガス吹込み羽口 ６…高温加熱ガ
ス吹込み羽口 ７…冷却ガス吹込み羽口 ８…昇温ガス抜
き出しダクト ９…炉頂部循環ガス抜き出しダクト １０，１１…循
環ガス冷却器 １２…低温吹込みガス加熱器 １３…高温吹込
みガス加熱器1 ... Briquette charging device 2 ... Shaft upper carbonization chamber 3 ... Shaft lower cooling chamber 4 ... Molding coke discharge port 5 ... Low temperature heating gas blowing tuyere 6 ... High temperature heating gas blowing tuyere 7 ... Cooling gas blowing tuyere 8 ... Temperature rising gas extraction duct 9 ... Furnace top circulating gas extraction duct 10, 11 ... Circulating gas cooler 12 ... Low temperature blowing gas heater 13 ... High temperature blowing gas heater
Claims (1)
よび高温羽口から吹き込む熱媒ガスにより加熱してコー
クス化し、かつ竪型シャフト炉内下部において上部で得
られた高温コークスを冷却用ガスにて冷却して冶金用成
型コークスを製造する冶金用成型コークスの製造方法に
おいて、高温羽口から吹き込むガスの温度を７５０〜８
５０℃とし、かつコークス冷却速度を２００℃／Ｈｒ以
下とする冶金用成型コークスの製造方法。1. A method for heating formed coal in the upper part of a vertical shaft furnace by a heating medium gas blown from low temperature and high temperature tuyeres to form coke, and for cooling the high temperature coke obtained in the upper part in the lower part of the vertical shaft furnace for cooling. In the method for producing a metallurgical molding coke, which is cooled with gas to produce a metallurgical molding coke, the temperature of the gas blown from the high temperature tuyere is 750 to 8
A method for producing a molded coke for metallurgy, wherein the coke cooling rate is 50 ° C. and the coke cooling rate is 200 ° C./Hr or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4074240A JP2520539B2 (en) | 1992-03-30 | 1992-03-30 | Manufacturing method of molding coke for metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4074240A JP2520539B2 (en) | 1992-03-30 | 1992-03-30 | Manufacturing method of molding coke for metallurgy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05271663A JPH05271663A (en) | 1993-10-19 |
| JP2520539B2 true JP2520539B2 (en) | 1996-07-31 |
Family
ID=13541442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4074240A Expired - Lifetime JP2520539B2 (en) | 1992-03-30 | 1992-03-30 | Manufacturing method of molding coke for metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520539B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011106645A1 (en) * | 2011-07-05 | 2013-01-10 | Linde Aktiengesellschaft | Process for the production of coke |
-
1992
- 1992-03-30 JP JP4074240A patent/JP2520539B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05271663A (en) | 1993-10-19 |
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