JPH0144429B2 - - Google Patents
Info
- Publication number
- JPH0144429B2 JPH0144429B2 JP13496586A JP13496586A JPH0144429B2 JP H0144429 B2 JPH0144429 B2 JP H0144429B2 JP 13496586 A JP13496586 A JP 13496586A JP 13496586 A JP13496586 A JP 13496586A JP H0144429 B2 JPH0144429 B2 JP H0144429B2
- Authority
- JP
- Japan
- Prior art keywords
- lid
- refractory
- ladle
- burner
- air
- 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
Links
- 238000001035 drying Methods 0.000 claims description 23
- 239000011819 refractory material Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、製鉄所、製鋼所または窯業メーカ
ー等において、溶銑、溶鋼その他溶融金属を収容
する取鍋の内張り耐火物の張り替え時における、
前記内張り耐火物の乾燥装置に関するものであ
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method for relining the refractory lining of a ladle that accommodates hot metal, molten steel, and other molten metals at a steel mill, a steel mill, or a ceramic manufacturer.
The present invention relates to a drying device for the refractory lining.
製鉄所、製鋼所または窯業メーカー等におい
て、溶銑、溶鋼その他溶融金属を収容するための
取鍋は、その内張り耐火物の張り替えを行なつた
ときに、内張り耐火物を乾燥することが必要であ
る。第６図は従来の取鍋の内張り耐火物の乾燥装
置の１例を示す一部切欠き側面断面図である。第
６図に示すように、従来の乾燥装置は、取鍋１１
の上端に載置して、取鍋１１の開口面を覆う、下
面に断熱材１２が張設された蓋１３と、蓋１３
に、蓋１３を貫通して設けられた乾燥用バーナ１
４と、蓋１３に、蓋１３を貫通して設けられた排
ガス排出用の煙突１６と、煙突１６の途中に設け
られた熱交換器１７とからなつている。１８は取
鍋１１の鉄皮である。
In ironworks, steel mills, ceramic manufacturers, etc., when the refractory lining of ladles used to store hot metal, molten steel, and other molten metals is replaced, it is necessary to dry the refractory lining. . FIG. 6 is a partially cutaway side sectional view showing an example of a conventional ladle lining refractory drying device. As shown in FIG. 6, the conventional drying device has a ladle 11
a lid 13 placed on the upper end to cover the opening surface of the ladle 11 and having a heat insulating material 12 stretched on the lower surface;
A drying burner 1 is provided through the lid 13.
4, a chimney 16 for discharging exhaust gas provided through the lid 13, and a heat exchanger 17 provided in the middle of the chimney 16. 18 is the iron skin of the ladle 11.
取鍋１１の内張り耐火物１５を乾燥するに当つ
ては、蓋１３を取鍋１１の上端に載置して、取鍋
１１の開口面を覆う。次いで、乾燥用バーナ１４
によつて取鍋１１内に燃焼ガスを噴射し、その熱
によつて内張り耐火物１５を乾燥する。このよう
にして、内張り耐火物１５を乾燥した高温の燃焼
排ガスは、煙突１６を通つて、取鍋１１内から外
部へ排出される。熱交換器１７は、バーナ１４の
燃焼用の空気を取り入れる配管１９内の空気を昇
温するために設けられている。バーナ１４の燃焼
時の空気は、熱交換器１７を通るバーナ１４の排
ガスによつて昇温される。バーナ１４から噴射す
る火炎の温度は、燃焼用の空気が昇温されること
により高温となり、取鍋１１の内張り耐火物１５
の乾燥能率の向上に役立つている。 When drying the refractory lining 15 of the ladle 11, the lid 13 is placed on the upper end of the ladle 11 to cover the opening surface of the ladle 11. Next, the drying burner 14
Combustion gas is injected into the ladle 11, and the refractory lining 15 is dried by the heat. The high-temperature combustion exhaust gas that has dried the refractory lining 15 in this way is discharged from inside the ladle 11 to the outside through the chimney 16. The heat exchanger 17 is provided to raise the temperature of the air in the pipe 19 that takes in air for combustion in the burner 14 . The air during combustion in the burner 14 is heated by exhaust gas from the burner 14 passing through the heat exchanger 17 . The temperature of the flame injected from the burner 14 becomes high as the temperature of the combustion air increases, and
Helps improve drying efficiency.
しかしながら、上述した従来の耐火物乾燥装置
には、次のような問題がある。 However, the conventional refractory drying apparatus described above has the following problems.
蓋には、バーナ、熱交換器、燃料配管、燃焼
空気配管、およびその他の各種制御装置等が、
取り付けられているので、蓋がこれら装置で複
雑になり、各装置の保守点検が困難である。さ
らにこれらの装置を取り付けるために蓋の強度
を強化する必要があるので、蓋の重量が大きく
なる。 The lid contains burners, heat exchangers, fuel piping, combustion air piping, and other various control devices.
Because of the mounting, the lid is complicated by these devices and maintenance and inspection of each device is difficult. Furthermore, the strength of the lid must be strengthened in order to attach these devices, which increases the weight of the lid.
熱交換器のように、高さの大きいものがある
ため、装置全体の高さが高くなる。 Some devices, such as heat exchangers, are tall, so the overall height of the device increases.
蓋の重量が重く、装置の高さ寸法が大きいた
め、装置の移動、取扱い等に困難性が伴うとと
もに、天井クレーン等の懸吊荷重制限、高さ制
限等の条件によつて取扱いが規制を受けること
がある。 Because the lid is heavy and the height of the device is large, it is difficult to move and handle the device, and handling is restricted due to conditions such as hanging load restrictions and height restrictions for overhead cranes, etc. I may receive it.
燃焼用空気の予熱は、煙突を通過する排ガス
の熱のみで行われる。従つて、煙突以外の部
分、例えば取鍋の上縁と蓋の下面との接触部の
隙間から、逃げる排ガスの量が多いと、煙突を
通過する排ガスの量が減少するので、燃焼用空
気の予熱効果があがらない。 Preheating of the combustion air is performed solely by the heat of the exhaust gases passing through the chimney. Therefore, if there is a large amount of exhaust gas escaping from areas other than the chimney, such as the gap between the upper edge of the ladle and the bottom surface of the lid, the amount of exhaust gas passing through the chimney will decrease, which will reduce the amount of combustion air. The preheating effect does not improve.
従つてこの発明の目的は、取鍋内の燃焼排ガス
の熱によつて、バーナの燃焼空気を、効率良く、
しかも確実に昇温することが可能な、取鍋の内張
り耐火物乾燥装置を提供することにある。
Therefore, an object of the present invention is to efficiently convert the combustion air of the burner by using the heat of the combustion exhaust gas in the ladle.
Moreover, it is an object of the present invention to provide a ladle lining refractory drying device that can reliably raise the temperature.
この発明は、取鍋の上端に載置して、前記取鍋
の開口面を覆う、下面に耐火物が張設された蓋
と、前記蓋の中央部に前記蓋を貫通して設けられ
たバーナと、前記蓋に、前記蓋を貫通して設けら
れた煙突からなる取鍋の内張り耐火物乾燥装置に
おいて、前記蓋の下面に張設された耐火物の内部
に、一方の端部が前記蓋の側面部において、空気
取入用配管に連結され、他方の端部が前記バーナ
に連結された、前記一方の端部から取り入れた空
気を、前記他方の端部から前記バーナに送り込む
ための空気流通孔を設けたことに特徴を有するも
のである。
The present invention includes a lid that is placed on the upper end of the ladle and covers the opening surface of the ladle, and a refractory material is stretched on the lower surface of the lid, and a lid that is provided in the center of the lid so as to pass through the lid. In a ladle-lined refractory drying device comprising a burner and a chimney provided through the lid, one end of the refractory is placed inside the refractory stretched over the lower surface of the lid. A side surface of the lid is connected to an air intake pipe, and the other end is connected to the burner, for feeding air taken in from the one end to the burner from the other end. It is characterized by the provision of air circulation holes.
次にこの発明を図面を参照しながら説明する。
第１図はこの発明の取鍋の内張り耐火物乾燥装置
の１実施態様を示す平面図、第２図は側面図、第
３図は第１図のＡ−Ａ線断面図、第４図はこの発
明の取鍋の内張り耐火物乾燥装置を取鍋に載置し
た状態を示す一部切欠き側面断面図である。
Next, the present invention will be explained with reference to the drawings.
Fig. 1 is a plan view showing one embodiment of the ladle lining refractory drying device of the present invention, Fig. 2 is a side view, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is FIG. 2 is a partially cutaway side sectional view showing the ladle lining refractory drying device of the present invention placed on a ladle.
第１図〜第３図に示すように、取鍋の内張り耐
火物乾燥装置１は、蓋２、バーナ３および煙突
４，４からなつている。蓋２は下面に耐火物６が
張設されている。バーナ３は、蓋２の中央部に、
蓋２を貫通して設けられている。煙突４，４は、
蓋２を貫通して設けられている。蓋２の下面に張
設された耐火物６の内部には、複数本のチユーブ
５が所定の間隔を開けて、互いに水平に埋設され
ている。複数本のチユーブ５は、バーナ３および
煙突４が貫設された部分を除き耐火物６の一方の
側面部２ａから、他方の側面部２ｂまで貫通して
いる。蓋２の一方の側面部２ａには、側面部２ａ
の形状に沿つて、空気導入用集合管７が弧状に設
けられている。集合管７は複数本のチユーブ５の
各々の一端に接続され、空気取入用配管１０から
取り入れたバーナ３の燃焼用の空気を、複数本の
チユーブ５の各々に送り込む。蓋２の他方の側面
部２ｂには、側面部２ｂの形状に沿つて空気排出
用集合管８，８が弧状に設けられている。集合管
８，８は複数本のチユーブ５の各々の他端に接続
されている。集合管８，８の上部には、集合管
８，８から排出された空気を、バーナ３に送り込
むための連結管９，９が接続されている。 As shown in FIGS. 1 to 3, a ladle lining refractory drying device 1 includes a lid 2, a burner 3, and a chimney 4. A refractory material 6 is stretched on the lower surface of the lid 2. The burner 3 is located in the center of the lid 2.
It is provided to penetrate the lid 2. Chimneys 4, 4 are
It is provided to penetrate the lid 2. Inside a refractory 6 stretched over the lower surface of the lid 2, a plurality of tubes 5 are buried horizontally with each other at predetermined intervals. The plurality of tubes 5 penetrate the refractory 6 from one side surface 2a to the other side surface 2b, except for the portion through which the burner 3 and the chimney 4 are penetrated. One side surface 2a of the lid 2 has a side surface 2a.
The air introduction collecting pipe 7 is provided in an arc shape along the shape. The collecting pipe 7 is connected to one end of each of the plurality of tubes 5, and sends combustion air for the burner 3 taken in from the air intake pipe 10 to each of the plurality of tubes 5. On the other side surface 2b of the lid 2, air exhaust collecting pipes 8, 8 are provided in an arc shape along the shape of the side surface 2b. The collecting pipes 8, 8 are connected to the other end of each of the plurality of tubes 5. Connecting pipes 9, 9 for sending air discharged from the collecting pipes 8, 8 to the burner 3 are connected to the upper parts of the collecting pipes 8, 8.
取鍋の内張り耐火物を乾燥する場合は、第４図
に示すように先ず、図示しないクレーン等で耐火
物乾燥装置１を懸吊し、取鍋１１の上端に載置し
て取鍋１１の開口面を覆う。次にバーナ３によ
り、取鍋１１内に燃焼ガスを噴射させて、取鍋１
１内の内張り耐火物１５の乾燥を行う。１８は取
鍋１１の鉄皮である。燃焼中の燃焼ガスの排ガス
は、蓋２の下面の耐火物６の下面全体に熱を加え
た後、煙突４，４から順次取鍋１１の外部へ排出
される。この際、耐火物６内に埋設された複数本
のチユーブ５も、耐火物を通して同時に加熱され
るので、複数本のチユーブ５を通る空気は排ガス
により昇温される。この昇温された空気は、集合
管８，８および連結管９，９を通つて、バーナ３
に送り込まれ、バーナ３の燃焼用空気として使用
される。バーナ３は昇温された空気により、効率
良く高温の燃焼ガスを取鍋１１内に噴射すること
ができる。 When drying the refractory lining of a ladle, as shown in FIG. Cover the opening surface. Next, combustion gas is injected into the ladle 11 by the burner 3, and the ladle 1
The lining refractory material 15 in the container 1 is dried. 18 is the iron skin of the ladle 11. The exhaust gas of the combustion gas during combustion is sequentially discharged to the outside of the ladle 11 from the chimneys 4, 4 after applying heat to the entire lower surface of the refractory 6 on the lower surface of the lid 2. At this time, since the plurality of tubes 5 buried in the refractory 6 are also heated simultaneously through the refractory, the temperature of the air passing through the plurality of tubes 5 is raised by the exhaust gas. This heated air passes through the collecting pipes 8, 8 and the connecting pipes 9, 9, and then passes through the burner 3.
and is used as combustion air for the burner 3. The burner 3 can efficiently inject high-temperature combustion gas into the ladle 11 by using the heated air.
チユーブ５は、熱および腐食に十分耐えられる
材質のもの、即ち、耐熱および耐腐食鋼等の金属
類、あるいはセラミツク材等を使用するべきであ
る。 The tube 5 should be made of a material that can sufficiently withstand heat and corrosion, ie, metal such as heat-resistant and corrosion-resistant steel, or ceramic material.
チユーブは、蓋２の下面に張設された耐火物６
内に平行に埋設する他、次に述べるように埋設し
てもよい。第５図は、この発明の取鍋の内張り耐
火物乾燥装置の他の実施態様を示す平面図であ
る。第５図に示すように、蓋２の下面に張設され
た耐火物６の内部には、チユーブ２０がバーナ３
を中心として、バーナ３および煙突４，４の外周
に、螺旋状に埋設されている。チユーブ２０は、
蓋２の側面部において、その一方の端部を、空気
取入用配管１０と連結され、その他方の端部を、
蓋２の中心部の上面において、バーナ３に連結さ
れている連結管２１に連結されている。空気取入
用配管１０から取り入れられた空気は、チユーブ
２０を通る間に排ガスにより昇温され、バーナ３
に送り込まれ、バーナ３の燃焼用空気として使用
される。 The tube is a refractory material 6 stretched on the bottom surface of the lid 2.
In addition to being buried parallel to the inside, it may also be buried as described below. FIG. 5 is a plan view showing another embodiment of the ladle lining refractory drying device of the present invention. As shown in FIG. 5, a tube 20 is installed inside the refractory 6 stretched over the bottom surface of the lid 2.
It is embedded in a spiral shape around the burner 3 and the chimneys 4, 4 around the center. Tube 20 is
One end of the side surface of the lid 2 is connected to the air intake pipe 10, and the other end is connected to the air intake pipe 10.
The lid 2 is connected to a connecting pipe 21 connected to the burner 3 on the upper surface of the center thereof. The air taken in from the air intake pipe 10 is heated by exhaust gas while passing through the tube 20, and is heated by the burner 3.
and is used as combustion air for the burner 3.
耐火物６内における、チユーブ５および２０
の、蓋２の下面からの距離は、耐火物６の材質、
熱条件、バーナ３の熱交換条件等により、決定す
べきである。 Tubes 5 and 20 in the refractory 6
The distance from the bottom surface of the lid 2 is the material of the refractory 6,
It should be determined based on the thermal conditions, heat exchange conditions of the burner 3, etc.
チユーブ５および２０の断面形状は、円型をは
じめ、矩形若しくは多角形でもよい。 The cross-sectional shape of the tubes 5 and 20 may be circular, rectangular, or polygonal.
チユーブ５および２０は、熱膨張の恐れがある
ので、チユーブの両端部に伸縮継手を設けて、チ
ユーブの熱膨張に対応させるべきである。 Since tubes 5 and 20 are subject to thermal expansion, expansion joints should be provided at both ends of the tubes to accommodate the thermal expansion of the tubes.
蓋２の下面に張設された耐火物６内の空気流通
孔としては、波形の、例えば鉄板等の耐熱および
耐腐食鋼板を複数枚重ね合わせ、鉄板と鉄板との
間の隙間を空気が通過するような形状のものを使
用してもよい。 The air circulation holes in the refractory 6 stretched on the bottom surface of the lid 2 are made by stacking a plurality of corrugated heat-resistant and corrosion-resistant steel plates such as iron plates, and air passes through the gaps between the iron plates. You may also use one shaped like this.
以上述べたように、この発明の取鍋の内張り耐
火物乾燥装置によれば、
蓋の上に熱交換器を搭載しないので、蓋上の
装置が簡素化され、蓋上のスペースに余裕がで
き、保守点検が容易に行える。
As described above, according to the ladle lining refractory drying device of the present invention, since no heat exchanger is mounted on the lid, the device on the lid is simplified and the space on the lid can be freed. , maintenance and inspection can be easily performed.
チユーブを使用する場合には、チユーブ自体
が、蓋の強度材となり、また空気の通過する部
分が中空部のために、蓋全体の重量が軽減す
る。 When a tube is used, the tube itself serves as a strength material for the lid, and since the portion through which air passes is hollow, the weight of the entire lid is reduced.
熱交換器がないので、装置全体の高さが減少
し、取扱い、移動等が容易となり、天井クレー
ン等の懸吊荷重制限等の制約を受けない。 Since there is no heat exchanger, the overall height of the device is reduced, making it easier to handle, move, etc., and not be subject to restrictions such as the suspension load limit of overhead cranes.
取鍋内の燃焼排ガスの熱を、蓋の下面のほぼ
全面で受けられるので、効率良く熱交換をする
ことができ、省エネに寄与する。 The heat of the combustion exhaust gas in the ladle can be received over almost the entire bottom surface of the lid, allowing efficient heat exchange and contributing to energy savings.
等、工業上優れた効果がもたらされる。etc., bring about excellent industrial effects.
第１図はこの発明の取鍋の内張り耐火物乾燥装
置の１実施態様を示す平面図、第２図は側面図、
第３図は第１図のＡ−Ａ線断面図、第４図はこの
発明の内張り耐火物乾燥装置を取鍋に載置した状
態を示す一部切欠き側面断面図、第５図はこの発
明の取鍋の内張り耐火物乾燥装置の他の実施態様
を示す平面図、第６図は従来の取鍋の内張り耐火
物乾燥装置の１例を示す一部切欠き側面断面図で
ある。図面において、
１……取鍋の内張り耐火物乾燥装置、２……
蓋、３……バーナ、４……煙突、５……チユー
ブ、６……耐火物、７……集合管、８……集合
管、９……連結管、１０……空気取入用配管、１
１……取鍋、１２……断熱材、１３……蓋、１４
……バーナ、１５……内張り耐火物、１６……煙
突、１７……熱交換器、１８……鉄皮、１９……
配管、２０……チユーブ、２１……連結管。
FIG. 1 is a plan view showing one embodiment of the ladle lining refractory drying device of the present invention, FIG. 2 is a side view,
Fig. 3 is a sectional view taken along the line A-A in Fig. 1, Fig. 4 is a partially cutaway side sectional view showing the refractory lining drying device of the present invention placed on a ladle, and Fig. FIG. 6 is a plan view showing another embodiment of the ladle lining refractory drying device of the invention, and FIG. 6 is a partially cutaway side sectional view showing an example of the conventional ladle lining refractory drying device. In the drawings, 1... Ladle lining refractory drying device, 2...
Lid, 3...burner, 4...chimney, 5...tube, 6...refractory, 7...collecting pipe, 8...collecting pipe, 9...connecting pipe, 10...air intake piping, 1
1... Ladle, 12... Insulation material, 13... Lid, 14
... Burner, 15 ... Lining refractory, 16 ... Chimney, 17 ... Heat exchanger, 18 ... Iron skin, 19 ...
Piping, 20...tube, 21...connecting pipe.
Claims (1)
覆う、下面に耐火物が張設された蓋と、前記蓋の
中央部に前記蓋を貫通して設けられたバーナと、
前記蓋に、前記蓋を貫通して設けられた煙突から
なる取鍋の内張り耐火物乾燥装置において、 前記蓋の下面に張設された耐火物の内部に、一
方の端部が前記蓋の側面部において、空気取入用
配管に連結され、他方の端部が前記バーナに連結
された、前記一方の端部から取り入れた空気を、
前記他方の端部から前記バーナに送り込むための
空気流通孔を設けたことを特徴とする取鍋の内張
り耐火物乾燥装置。[Scope of Claims] 1. A lid placed on the upper end of the ladle and covering the opening surface of the ladle, the lower surface of which is covered with a refractory material, and a lid that extends through the lid at the center of the lid. With a burner provided,
In a ladle-lined refractory drying device comprising a chimney provided through the lid, one end of the refractory is placed inside the refractory stretched on the lower surface of the lid. In the part, the air is taken in from the one end connected to the air intake piping and the other end is connected to the burner,
A refractory lining drying device for a ladle, characterized in that an air circulation hole is provided for feeding air from the other end to the burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13496586A JPS62292252A (en) | 1986-06-12 | 1986-06-12 | Drying device for lining refractory of ladle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13496586A JPS62292252A (en) | 1986-06-12 | 1986-06-12 | Drying device for lining refractory of ladle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62292252A JPS62292252A (en) | 1987-12-18 |
| JPH0144429B2 true JPH0144429B2 (en) | 1989-09-27 |
Family
ID=15140727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13496586A Granted JPS62292252A (en) | 1986-06-12 | 1986-06-12 | Drying device for lining refractory of ladle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62292252A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101084367B1 (en) * | 2008-10-22 | 2011-11-21 | 에스케이에너지 주식회사 | Dry out method of refractory coated in inner wall of reactor, regenerator, and flue gas duct for FCC process |
-
1986
- 1986-06-12 JP JP13496586A patent/JPS62292252A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62292252A (en) | 1987-12-18 |
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