JPH03247715A - Dispersing disk for pre-reduction furnace in smelting reduction equipment - Google Patents
Dispersing disk for pre-reduction furnace in smelting reduction equipmentInfo
- Publication number
- JPH03247715A JPH03247715A JP2044372A JP4437290A JPH03247715A JP H03247715 A JPH03247715 A JP H03247715A JP 2044372 A JP2044372 A JP 2044372A JP 4437290 A JP4437290 A JP 4437290A JP H03247715 A JPH03247715 A JP H03247715A
- Authority
- JP
- Japan
- Prior art keywords
- reduction furnace
- gas
- reduction
- furnace
- conduit
- 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.)
- Granted
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 70
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 67
- 229910052742 iron Inorganic materials 0.000 claims abstract description 29
- 238000007664 blowing Methods 0.000 claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 238000009826 distribution Methods 0.000 claims description 22
- 239000006185 dispersion Substances 0.000 claims description 17
- 239000000112 cooling gas Substances 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 6
- 239000012809 cooling fluid Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 13
- 239000003575 carbonaceous material Substances 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003245 coal Substances 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 238000012432 intermediate storage Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、鉄鉱石の溶融還元設備における予備還元炉
の分散盤に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a dispersion plate of a preliminary reduction furnace in an iron ore smelting reduction facility.
鉄浴が収容された転炉型の溶融還元炉内に鉄鉱石および
炭材を供給し、前記溶融還元炉内に上方からランスを通
して酸素を吹込むことにより鉄鉱石を溶融還元する、鉄
鉱石の溶融還元設備が知られている。Iron ore is produced by supplying iron ore and carbonaceous material into a converter-type smelting reduction furnace containing an iron bath, and melting and reducing the iron ore by blowing oxygen into the smelting reduction furnace from above through a lance. Melting reduction equipment is known.
第３図は、このような溶融還元設備の概略説明図である
。第３図に示すように、溶融還元設備は、転炉型の溶融
還元炉（１）と、この溶融還元炉（１）内に供給される
主原料の鉄鉱石を予備還元するため、溶融還元炉上方に
設けられた流動槽型の予備還元炉（２）と、主原料用の
貯槽（３）と、副原料用の貯槽（４）とからなっている
。FIG. 3 is a schematic explanatory diagram of such melting reduction equipment. As shown in Fig. 3, the smelting reduction equipment includes a converter-type smelting reduction furnace (1) and a smelting reduction facility for pre-reducing iron ore, which is the main raw material supplied into the smelting reduction furnace (1). It consists of a fluidized tank type preliminary reduction furnace (2) provided above the furnace, a storage tank (3) for main raw materials, and a storage tank (4) for auxiliary raw materials.
前記溶融還元炉（１）は、転炉型の炉体（５）と、この
炉体（５）の炉口（５ａ）を通して炉体（５）内に垂直
に挿入されるランス（６）と、炉体（５）の底壁および
側壁に設けられた撹拌用ガス吹込口（７）と、炉口（５
ａ）を覆うフート（８）に設けられた、主原料供給用シ
ュート（９）、副原料供給用シューＩ・（１０）および
ガス排出口（１１）とからなっている。The smelting reduction furnace (1) includes a converter type furnace body (5) and a lance (6) vertically inserted into the furnace body (5) through the furnace mouth (5a) of the furnace body (5). , a stirring gas inlet (7) provided on the bottom wall and side wall of the furnace body (5), and a furnace opening (5).
It consists of a main raw material supply chute (9), an auxiliary raw material supply shoe I (10), and a gas discharge port (11), which are provided on the foot (8) covering the a).
前記予備還元炉（２）は、炉内下部に設けられた、多数
のノズル（１３）を有する分散盤（１２）と、この分散
盤（１２）により区画され、分散盤（１２）よりも下方
の炉内に形成されたガス吹込室（１４）と、分散盤（１
２）よりも上方の炉内に形成された予備還元室（１５）
とからなっている。ガス吹込室（１４）にはガス吹込口
（１６）が設けられ、予備還元室（１５）には、原料供
給用シュート（１７）およびガス排出口（１８）が設け
られている。The preliminary reduction furnace (2) is partitioned by a dispersion plate (12) provided at the lower part of the furnace and having a large number of nozzles (13), and a dispersion plate (12) located below the dispersion plate (12). A gas blowing chamber (14) formed in the furnace and a distribution plate (1
2) A preliminary reduction chamber (15) formed in the furnace above
It consists of The gas blowing chamber (14) is provided with a gas blowing port (16), and the preliminary reduction chamber (15) is provided with a raw material supply chute (17) and a gas discharge port (18).
分散盤（１２）の中央部に設けられた排出孔（１２ａ）
には、予備還元された鉄鉱石（以下、単に鉱石という）
の排出管（１９）が取付けられている。この排出管（１
９）は、予備還元炉（２）の底壁を貫通３−
して下方に伸び、Ｌ型状バルブ（２０）および２基の中
間貯槽（２１）を経て、溶融還元炉（１）のシュート（
９）に連結されている。Discharge hole (12a) provided in the center of the distribution board (12)
is pre-reduced iron ore (hereinafter simply referred to as ore).
A discharge pipe (19) is attached. This discharge pipe (1
9) extends downward through the bottom wall of the pre-reduction furnace (2), passes through an L-shaped valve (20) and two intermediate storage tanks (21), and then enters the chute of the smelting reduction furnace (1). (
9).
第４図の拡大断面図で示すように、分散盤（１２）は、
耐火物製で、その上面がすりばち状に形成されており、
中央部の排出孔（１２ａ）を囲むように、例えばセラミ
ックス製の複数個のノズル（１３）が設けられている。As shown in the enlarged sectional view of FIG. 4, the distribution disk (12) is
It is made of refractory material, and its upper surface is formed into a dome shape.
A plurality of nozzles (13) made of, for example, ceramics are provided so as to surround the central discharge hole (12a).
溶融還元炉（１）のフート（８）に設けられたガス排出
口（１１）には、予備還元炉（２）のガス吹込室（１４
）に設けられたガス吹込口（１６）に至るガス導管（２
２）が取付けられている。このガス導管（２２）の途中
には、集塵用サイクロン（２３）が設けられている。The gas outlet (11) provided in the foot (8) of the melting reduction furnace (1) is connected to the gas blowing chamber (14) of the preliminary reduction furnace (2).
) A gas conduit (2) leading to a gas inlet (16) provided in
2) is installed. A dust collecting cyclone (23) is provided in the middle of this gas conduit (22).
予備還元炉（２）のガス排出口（１８）にはガス排出管
（２４）が取付けられており、ガス排出管（２４）の途
中には集塵用サイクロン（２５）が設けられている。A gas exhaust pipe (24) is attached to the gas exhaust port (18) of the preliminary reduction furnace (2), and a dust collecting cyclone (25) is provided in the middle of the gas exhaust pipe (24).
主原料用の貯槽（３）と予備還元炉（２）の原料供給用
シュー１〜（１７）との間は、ダクト（２６）によって
連結されており、また、副原料用の貯槽（４）と溶融還
元炉（１）の副原料供給用シュート（１０）との間は、
ダクト（２７）によって連結されている。The main raw material storage tank (3) and the raw material supply shoes 1 to (17) of the preliminary reduction furnace (2) are connected by a duct (26), and the auxiliary raw material storage tank (4) and the auxiliary raw material supply chute (10) of the melting reduction furnace (1),
They are connected by a duct (27).
以上のような溶融還元設備では、溶融還元炉（１）内に
所定量の溶鉄（２８）を収容し、シュート（９）を通じ
て、予備還元炉（２）において予備還元された主原料と
しての所定粒度の鉱石を、溶融還元炉（１）内に供給し
、また、シュート（１０）を通じて、副原料用としての
石炭等の炭材およびフラックスを溶融還元炉（１）内に
供給する。In the above-described smelting reduction equipment, a predetermined amount of molten iron (28) is stored in the smelting reduction furnace (1), and a predetermined amount of molten iron (28) as the main raw material is pre-reduced in the pre-reduction furnace (2) through the chute (9). Particle-sized ore is supplied into the smelting reduction furnace (1), and carbonaceous materials such as coal and flux as auxiliary raw materials are supplied into the smelting reduction furnace (1) through the chute (10).
また、溶融還元炉（１）の炉口（５ａ）から炉体（５）
内に垂直に挿入されたランス（６）を通じて、炉内に酸
素ガスを吹込み、さらに、炉体（５）の底壁および側壁
に設けられたガス吹込口（７）を通じて、炉内の溶鉄（
２８）中に窒素ガス等の撹拌用ガスを吹込む。In addition, from the furnace mouth (5a) of the melting reduction furnace (1) to the furnace body (5)
Oxygen gas is injected into the furnace through a lance (6) inserted vertically into the furnace, and molten iron in the furnace is injected through the gas inlet (7) provided on the bottom wall and side wall of the furnace body (5). (
28) Blow a stirring gas such as nitrogen gas into the container.
炉内に供給された炭材および溶鉄（２８）中の炭素と、
ランス（６）を通じて吹込まれた酸素ガスとが反応して
ＣＯガスが発生し、発生したＣＯガスは、ランス（６）
を通じて吹込まれた過剰の酸素ガスと反応してＣＯ２ガ
スとなる。このときに発生したＣＯ２ガスの顕熱により
、溶鉄（２８）中の鉱石が溶融し、炭材中の炭素により
還元されて溶銑となる。Carbon in the carbonaceous material and molten iron (28) supplied into the furnace,
The oxygen gas blown through the lance (6) reacts to generate CO gas, and the generated CO gas is transferred to the lance (6).
It reacts with excess oxygen gas blown through the gas to form CO2 gas. The ore in the molten iron (28) is melted by the sensible heat of the CO2 gas generated at this time, and is reduced by the carbon in the carbonaceous material to become molten pig iron.
一方、精錬中に溶融還元炉（１）内から発生した高温の
排ガスは、フード（８）のガス排出口（１１）から排出
され、ガス導管（２２）を通って、予備還元炉（２）の
ガス吹込室（１４）内に吹込まれる。ガス吹込室（１４
）内に吹込まれた高温の排ガスは、分散盤（１２）のノ
ズル（１３）を通って予備還元室（１５）内に噴出し、
貯槽（３）からダクト（２６）およびシュー１−（１，
７）を通じ供給された予備還元室（１５）内の所定粒度
の鉱石（２９）を、流動状態で予熱および予備還元する
。On the other hand, high-temperature exhaust gas generated from inside the smelting reduction furnace (1) during refining is discharged from the gas outlet (11) of the hood (8), passes through the gas conduit (22), and is sent to the preliminary reduction furnace (2). The gas is blown into the gas blowing chamber (14). Gas blowing chamber (14
) The high-temperature exhaust gas blown into the chamber passes through the nozzle (13) of the distribution plate (12) and is ejected into the pre-reduction chamber (15).
From the storage tank (3) to the duct (26) and the shoe 1-(1,
The ore (29) of a predetermined particle size in the pre-reduction chamber (15) supplied through 7) is preheated and pre-reduced in a fluidized state.
このようにして予備還元された鉱石は、分散盤（１２）
の排出孔（１，２ａ）に取付けられた排出管（１９）を
通じて予備還元炉（２）内から排出され、Ｌ型状バルブ
（２０）を経て２基の中間貯槽（２１）に交互に一時貯
蔵され、次いで、２基の中間貯槽（２１）から交互に切
出されて、溶融還元炉（１）内に供給される。溶融還元
炉（１）内に供給された鉱石は、上述のように予備還元
されているので、その還元工程が軽減され、熱効率を向
上させることができる。The ore pre-reduced in this way is transferred to the dispersion plate (12).
It is discharged from the preliminary reduction furnace (2) through the discharge pipe (19) attached to the discharge hole (1, 2a) of It is stored and then cut out alternately from two intermediate storage tanks (21) and supplied into the melting reduction furnace (1). Since the ore supplied into the smelting reduction furnace (1) has been pre-reduced as described above, the reduction process can be reduced and thermal efficiency can be improved.
以上の設備において、予備還元炉（２）内に設けられた
分散盤（１２）は、前述したように耐火物製であり、し
たがって分散盤（１２）のノズル（１３）を通って予備
還元室（１５）内に噴出する溶融還元炉（１）内からの
高温排ガスによって蓄熱される。In the above equipment, the distribution disk (12) provided in the pre-reduction furnace (2) is made of refractory material as described above, and therefore, it passes through the nozzle (13) of the distribution disk (12) into the pre-reduction chamber. (15) Heat is stored by high temperature exhaust gas from inside the smelting reduction furnace (1) which is ejected into the inside.
一方、この溶融還元炉（１）からの排ガス中には、鉱石
の微粒子等のダストが混入している。このため、このよ
うな排ガス中のダストが、第４図に示すように、耐火物
製の分散盤の粗い下面（１２ｂ）に付着し、分散盤（１
２）の熱により加熱されて焼結する。この結果、ノズル
（１３）の下端が閉塞され、ノズル（１３）からの予備
還元用ガスの吹込みが不可能になるという問題が生ずる
。On the other hand, dust such as fine particles of ore is mixed in the exhaust gas from the smelting reduction furnace (1). For this reason, such dust in the exhaust gas adheres to the rough lower surface (12b) of the refractory distribution disk, as shown in FIG.
It is heated and sintered by the heat of 2). As a result, a problem arises in that the lower end of the nozzle (13) is blocked, making it impossible to blow the preliminary reducing gas through the nozzle (13).
従って、この発明の目的は、鉄鉱石の溶融還元設備にお
ける流動種型の予備還元炉の分散盤に関し、その予備還
元用ガスの吹込用ノズルに閉塞が生ずることがなく、予
備還元炉における鉄鉱石の予備還元を円滑に行い得る、
予備還元炉の分散盤を提供することにある。Therefore, an object of the present invention is to provide a dispersion plate of a fluidized type pre-reduction furnace in an iron ore smelting reduction facility, in which the nozzle for blowing the pre-reduction gas is not clogged, and the iron ore in the pre-reduction furnace is can smoothly carry out the preliminary return of
The purpose of the present invention is to provide a distribution plate for a preliminary reduction furnace.
この発明は、溶融還元設備における予備還元炉内を、下
部のガス吹込室と上部の予備還元室とに区画し、前記予
備還元室内に予備還元用ガスを吹込むための、予備還元
炉内に設けられた分散盤であって、前記分散盤を、複数
個のガス吹込用ノズルと、耐火物製の本体と、前記本体
の下面に固定された、内部を冷却用流体が流れるボック
ス状の金属盤とから構成したことをその特徴とする。This invention provides a preliminary reduction furnace in which the interior of a preliminary reduction furnace in a smelting reduction facility is divided into a lower gas blowing chamber and an upper preliminary reduction chamber, and is provided in the preliminary reduction furnace for blowing preliminary reduction gas into the preliminary reduction chamber. The distribution board includes a plurality of gas blowing nozzles, a main body made of refractory material, and a box-shaped metal board fixed to the lower surface of the main body, through which a cooling fluid flows. Its feature is that it is composed of
次に、この発明を、図面を参照しながら説明する。Next, the present invention will be explained with reference to the drawings.
第１９図は、この発明の分散盤の概略縦断面図である。FIG. 19 is a schematic vertical cross-sectional view of the distribution disk of the present invention.
予備還元炉（２）内に設けられた、ガス吹込室（１４）
と予備還元室（１５）とを区画する分散盤（１２）は、
耐火物製の分散盤本体（３０）と、該本体（３０）の下
面に固定された、例えばステンレス鋼製のボックス状の
金属盤（３１）とからなっている。（３２）は、金属盤
（３１）の側壁の所定箇所に設けられた冷却用流体の導
入口である。Gas blowing chamber (14) provided in the preliminary reduction furnace (2)
The dispersion plate (12) that partitions the and preliminary reduction chamber (15) is
It consists of a dispersion plate main body (30) made of refractory material and a box-shaped metal plate (31) made of stainless steel, for example, which is fixed to the lower surface of the main body (30). (32) is a cooling fluid inlet provided at a predetermined location on the side wall of the metal plate (31).
分散盤本体（３０）および金属盤（３１）の中央部には
、予備還元された鉄鉱石の排出孔（１２ａ）が設けられ
ている。A discharge hole (12a) for pre-reduced iron ore is provided in the center of the dispersing plate body (30) and the metal plate (31).
導入口（３２）から金属盤（３１）内に吹込まれた冷却
用流体、例えばガスは、金属盤を冷却した後取出口（３
６）より外部に排出される。The cooling fluid, such as gas, blown into the metal plate (31) from the inlet (32) cools the metal plate and then flows into the outlet (31).
6) More discharged to the outside.
さらに、本願第２の発明は、前記分散盤に設けられた排
出孔に、予備還元された鉱石を排出するための導管と、
該導管と所定間隙を有するよう、導管と向応に配置した
外筒とが設けられ、前記導管の管壁には複数個のガス噴
出孔が設けられ、前記金属盤内を流れる冷却用ガスが、
前記外筒と前記導管との間の間隙を通り、前記導管に設
けられたガス噴出孔から前記導管内に噴出するよう構成
したことをその特徴とするものである。Furthermore, the second invention of the present application includes a conduit for discharging pre-reduced ore to a discharge hole provided in the dispersion plate;
An outer cylinder is provided facing the conduit so as to have a predetermined gap with the conduit, and a plurality of gas ejection holes are provided in the wall of the conduit so that the cooling gas flowing inside the metal plate is provided. ,
The present invention is characterized in that the gas is ejected into the conduit through a gap between the outer cylinder and the conduit from a gas ejection hole provided in the conduit.
次に、この発明を図面を参照しながら説明する。Next, the present invention will be explained with reference to the drawings.
第２図は、この発明の分散盤を備えた予備還元炉の下部
の概略縦断面図である。予備還元炉（２）内に設けられ
た、ガス吹込室（１４）と予備還元室（１５）とを区画
する分散盤（１２）は、耐火物製の分散盤本体（３０）
と、該本体（３０）の下面に固定された、例えばステン
レス鋼製のボックス状の金属盤（３１）とからなってい
る、 （３２）は、金属盤（３１）の側壁の所定箇所に
設けられた冷却用ガスの導入口である。FIG. 2 is a schematic vertical cross-sectional view of the lower part of the pre-reducing furnace equipped with the distribution disk of the present invention. A distribution plate (12) provided in the preliminary reduction furnace (2) that partitions the gas blowing chamber (14) and the preliminary reduction chamber (15) is a distribution plate body (30) made of refractory material.
and a box-shaped metal plate (31) made of stainless steel, for example, which is fixed to the lower surface of the main body (30). This is the inlet for the cooled cooling gas.
分散盤本体（３０）および金属盤（３１）の中央部に設
けられた鉱石の排出孔（１２ａ）には、前記鉱石を排出
するための、例えばステンレス鋼製の導管（３３）と、
該導管（３３）と所定間隙を有するようにして、導管（
３３）と向応に配置した外筒（３４）とが取付けられて
いる。導管（３３）の下端には、金属盤（３１）の下面
（３１ａ）において排出管（１９）が接続されている。The ore discharge hole (12a) provided in the center of the distribution plate body (30) and the metal plate (31) includes a conduit (33) made of stainless steel, for example, for discharging the ore,
The conduit (33) has a predetermined gap therebetween.
33) and an outer cylinder (34) arranged in correspondence with each other. A discharge pipe (19) is connected to the lower end of the conduit (33) on the lower surface (31a) of the metal plate (31).
外筒（３４）の下端は、金属盤（３１）の上部に接続さ
れ、導入口（３２）から金属盤（３１）内に吹込まれた
冷却用ガスが、外筒（３４）と導管（３３）との間の間
隙内に流れるようになっている。The lower end of the outer cylinder (34) is connected to the upper part of the metal plate (31), and the cooling gas blown into the metal plate (31) from the inlet (32) flows between the outer cylinder (34) and the conduit (33). ) is designed to flow into the gap between the
導管（３３）の管壁には複数個のガス噴出孔（３５）が
設けられている。従って、導入口（３２）から金属盤（
３１）内に吹込まれた冷却用ガスは、外筒（３４）と導
管（３３）との間の間隙を通り、ガス噴出孔（３５）か
ら、導管（３３）内に排出される。A plurality of gas ejection holes (35) are provided in the pipe wall of the conduit (33). Therefore, from the inlet (32) to the metal plate (
The cooling gas blown into the tube (31) passes through the gap between the outer cylinder (34) and the conduit (33), and is discharged from the gas injection hole (35) into the conduit (33).
分散盤（１２）のガス吹込室（１４）に面する下部は、
金属盤（３１）からなっており、その下面（３１ａ）は
平滑である。従って、ガス吹込口（１６）を通り、ガス
吹込室（１４）内に吹込まれる溶融還元炉（１）からの
排ガス中に含まれるダストは、金属盤（３１）の下面（
３１ａ）に付着しにくい。The lower part of the distribution plate (12) facing the gas blowing chamber (14) is
It consists of a metal plate (31), the lower surface (31a) of which is smooth. Therefore, the dust contained in the exhaust gas from the smelting reduction furnace (1), which passes through the gas inlet (16) and is blown into the gas blowing chamber (14), is removed from the lower surface of the metal plate (31).
31a) is difficult to adhere to.
さらに、金属盤（３１）内には、導入孔（３２）を通じ
て常時例えば窒素ガスのような不活性の冷却用ガスが吹
込まれ、金属盤（３１）の下面（３１ａ）を冷却してい
る。従って、上述したダス１−の金属盤（３］）の下面
（３１ａ）に対する付着はより適切に防止される。この
結果、分散盤本体（３０）および１
金属盤（３１）に取付けられたノズル（１３）の、金属
盤（３１）の下面（３１，ａ）に開口する下端が、ダス
トの付着によって閉塞することが適切に防止される。Further, an inert cooling gas such as nitrogen gas is constantly blown into the metal plate (31) through the introduction hole (32) to cool the lower surface (31a) of the metal plate (31). Therefore, adhesion of the dust 1- to the lower surface (31a) of the metal plate (3) is more appropriately prevented. As a result, the lower end of the nozzle (13) attached to the dispersion plate body (30) and the metal plate (31) 1, which opens to the lower surface (31, a) of the metal plate (31), is blocked by the adhesion of dust. This will be appropriately prevented.
また、本願節２の発明では、金属盤（３１）を冷却した
冷却用ガスは、前述したように、外筒（３４）と導管（
３３）との間の間隙内を通り、ガス噴出孔（３５）から
、導管（３３）内に排出されるので、導管（３３）内を
通って排出される鉱石が、導管（３３）内に付着し焼結
して、導管（３３）を閉塞することも適切に防止される
。Further, in the invention of Section 2 of the present application, the cooling gas that cooled the metal plate (31) is transferred to the outer cylinder (34) and the conduit (
33) and is discharged from the gas outlet (35) into the conduit (33), so the ore discharged through the conduit (33) is It is also suitably prevented from sticking and sintering and blocking the conduit (33).
高さ１０ｍ、内径１ｍの予備還元炉（２）の分散盤（１
２）を、耐火物製の本体（３０）と、本体（３０）の下
面に固定されたステンレス鋼製のボックス状の金属盤（
３１）とによって構成した。The distribution plate (1) of the preliminary reduction furnace (2) with a height of 10 m and an inner diameter of 1 m
2), a refractory body (30) and a stainless steel box-shaped metal plate (30) fixed to the bottom surface of the body (30).
31).
分散盤本体（３０）および金属盤（３１）の中央部に設
けられた排出孔（＋２ａ）には、内径が２００ｍのステ
ンレス鋼製の導管（３３）と、該導管（３３）と所定間
隙を有する同じくステンレス鋼製の外筒２−
（３４）とを取付けた。The discharge hole (+2a) provided in the center of the distribution plate body (30) and the metal plate (31) has a stainless steel conduit (33) with an inner diameter of 200 m, and a predetermined gap between the conduit (33) and the discharge hole (+2a). An outer cylinder 2- (34) also made of stainless steel was attached.
分散盤本体（３０）および金属盤（３１）には、内径２
６ｍ＋のセラミックスパイプからなる複数個のノズル（
１３）を取付けた。The distribution plate body (30) and the metal plate (31) have an inner diameter of 2
Multiple nozzles made of 6m+ ceramic pipes (
13) was installed.
金属盤（３１）内に、導入口（３２）から冷却用の窒素
ガスを、５００ Ｎｒｒｉ’／Ｈの流量で供給し、外筒
（３４）と導管（３３）との間の間隙を通り、ガス噴出
孔（３５）から、導管（３３）内に排出した。Cooling nitrogen gas was supplied into the metal plate (31) from the inlet (32) at a flow rate of 500 Nrri'/H and passed through the gap between the outer cylinder (34) and the conduit (33). The gas was discharged from the gas outlet (35) into the conduit (33).
予備還元炉（２）内の予備還元室（１５）内に、０．５
から８ｍの粒径の鉄鉱石を供給した。そして、分散盤（
１２）のノズル（１３）から噴出する、溶融還元炉（１
）内から発生した約１０００℃の排ガスにより、予備還
元室（１５）内の鉄鉱石を、流動状態で予熱および予備
還元した。In the preliminary reduction chamber (15) in the preliminary reduction furnace (2), 0.5
Iron ore with a particle size of 8m was supplied from Then, the distribution board (
The melting reduction furnace (1) ejects from the nozzle (13) of the
) The iron ore in the pre-reduction chamber (15) was preheated and pre-reduced in a fluidized state by the approximately 1000° C. exhaust gas generated from within the pre-reduction chamber (15).
この結果、分散盤（１２）のノズル（１３）がダストの
付着によって閉塞することはなく、さらに、分散盤（１
２）の中央部に設けられた導管（３３）が、前記鉄鉱石
の付着によって閉塞することもなく、予備還元炉（２）
における鉄鉱石の予備還元を円滑に行うことができた。As a result, the nozzle (13) of the dispersion plate (12) will not be clogged due to adhesion of dust, and furthermore, the nozzle (13) of the dispersion plate (12)
The conduit (33) provided in the center of the pre-reduction furnace (2) is not blocked by the adhesion of the iron ore.
The preliminary reduction of iron ore was carried out smoothly.
以上述べたように、この発明によれば鉄鉱石の溶融還元
設備における流動槽型の予備還元炉において、分散盤に
設けられた予備還元用ガスの吹込用ノズルに閉塞が生ず
ることがなく、さらに、分散盤の中央部に設けられた鉄
鉱石排出用の導管に閉塞が生ずることもなく、予備還元
炉における鉄鉱石の予備還元を円滑に行うことができる
、工業上有用な効果がもたらされる。As described above, according to the present invention, in a fluidized tank type pre-reduction furnace in an iron ore smelting reduction facility, the nozzle for blowing the pre-reduction gas provided in the dispersion disk does not become clogged; This provides an industrially useful effect in that iron ore can be smoothly pre-reduced in the pre-reduction furnace without clogging the iron ore discharge conduit provided in the center of the dispersing disk.
第１図は本願節１の発明の分散盤を備えた予備還元炉の
下部の概略縦断面図、第２図は本願節２の発明の分散盤
を備えた予備還元炉の下部の概略縦断面図、第３図は溶
融還元設備の概略説明図、第４図は従来の分散盤の縦断
面図である。図面において、
（１）・ 溶融還元炉、
（３）（４）・・・貯槽、
（６） ・・ ランス、
（８） ・・ ツー１く、
（２）・−・ 予備還元炉、
（５） ・ 炉体、
（７）・・・ ガス吹込口、
（９）（１０）・・シュート、
（１］）・・・ ガス排出口、
（１２ａ）・・排出孔、
（１３）・・・ ノズル、
（１５）・ 予備還元室、
（１７）・・・ シュート、
（１９）・・・ 排出管、
（２１）・・・ 中間貯槽、
（２３） （２５）・・・集塵用サイクロン、（２６）
（２７）・・・ダクト、
（２９） 鉄鉱石、
（３１）・・・ 金属盤、
（３２）・・・ 導入口、
（３４）・・・ 外筒、
（１２）・
（１２ｂ）
（１４）・・・
（１６）
（１８）・・・
（２０）・・
（２２）・・・
（２４）・・・
（２８）・・・
（３０）・・・
（３１ａ）・・
（３３）・・・
（３５）・・
分散盤、
下面、
ガス吹込室、
ガス吹込口、
ガス排出口。
Ｌ型状バルブ、
ガス導管、
ガス排出管、
溶鉄、
分散盤本体、
下面、
導管、
ガス噴出孔。Fig. 1 is a schematic vertical cross-sectional view of the lower part of a pre-reduction furnace equipped with the distribution disk of the invention of Section 1 of the present application, and Fig. 2 is a schematic longitudinal cross-section of the lower part of the pre-reduction furnace equipped with the distribution disk of the invention of Section 2 of the present application. FIG. 3 is a schematic explanatory diagram of the melting reduction equipment, and FIG. 4 is a longitudinal cross-sectional view of a conventional dispersion plate. In the drawing, (1). Smelting reduction furnace, (3) (4)...storage tank, (6)... lance, (8)... two parts, (2)... preliminary reduction furnace, (5 ) ・ Furnace body, (7)... Gas inlet, (9) (10)... Chute, (1])... Gas outlet, (12a)... Discharge hole, (13)... Nozzle, (15) Preliminary reduction chamber, (17) Chute, (19) Discharge pipe, (21) Intermediate storage tank, (23) (25) Dust collection cyclone, (26)
(27)... Duct, (29) Iron ore, (31)... Metal plate, (32)... Inlet, (34)... Outer cylinder, (12) (12b) (14 )... (16) (18)... (20)... (22)... (24)... (28)... (30)... (31a)... (33) ... (35) ... Dispersion board, bottom surface, gas blowing chamber, gas blowing port, gas discharge port. L-shaped valve, gas conduit, gas discharge pipe, molten iron, distributor body, bottom surface, conduit, gas outlet.
Claims (2)
吹込室と上部の予備還元室とに区画し、前記予備還元室
内に予備還元用ガスを吹込むための、前記予備還元炉内
に設けられる分散盤において、複数個のガス吹込用ノズ
ルと、耐火物製の本体と、前記本体の下面に固定された
、内部を冷却用流体が流れるボックス状の金属盤とから
なることを特徴とする溶融還元設備における予備還元炉
の分散盤。(1) The preliminary reduction furnace in the smelting reduction equipment is divided into a lower gas blowing chamber and an upper preliminary reduction chamber, and a dispersion provided in the preliminary reduction furnace for blowing preliminary reduction gas into the preliminary reduction chamber. A smelting reduction plate comprising a plurality of gas blowing nozzles, a main body made of refractory material, and a box-shaped metal plate fixed to the lower surface of the main body, through which a cooling fluid flows. Dispersion board of pre-reduction furnace in equipment.
するための導管と、該導管と所定間隙を有するよう、導
管と同芯に配置した外筒とが設けられ、前記導管の管壁
には複数個のガス噴出孔が設けられ、下部の金属盤内を
流れる冷却用ガスが、前記外筒と前記導管との間の間隙
を通り、前記導管に設けられたガス噴出孔から前記導管
内に排出されるよう構成したことを特徴とする請求項１
記載の溶融還元設備における予備還元炉の分散盤。(2) An iron ore discharge hole is provided with a conduit for discharging pre-reduced iron ore, and an outer cylinder arranged concentrically with the conduit so as to have a predetermined gap with the conduit. A plurality of gas ejection holes are provided in the pipe wall, and the cooling gas flowing inside the metal plate at the bottom passes through the gap between the outer cylinder and the conduit and is discharged from the gas ejection holes provided in the conduit. Claim 1, characterized in that the liquid is configured to be discharged into the conduit.
A distribution plate of a pre-reduction furnace in the described smelting reduction equipment.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2044372A JP2536216B2 (en) | 1990-02-27 | 1990-02-27 | Dispersion disk of preliminary reduction furnace in smelting reduction equipment |
| AU71217/91A AU636199B2 (en) | 1990-02-27 | 1991-02-20 | Prereduction furnace of a smelting reduction facility of iron ore |
| US07/658,781 US5149487A (en) | 1990-02-27 | 1991-02-20 | Prereduction furnace of a smelting reduction facility of iron ore |
| CA002036972A CA2036972C (en) | 1990-02-27 | 1991-02-25 | Prereduction furnace of a smelting reduction facility of iron ore |
| BR919100772A BR9100772A (en) | 1990-02-27 | 1991-02-26 | PRE-REDUCTION OVEN OF AN IRON ORE FOUNDATION REDUCTION PLANT |
| ZA911388A ZA911388B (en) | 1990-02-27 | 1991-02-26 | Prereduction furnace of a smelting reduction facility of iron ore |
| DE69119623T DE69119623T2 (en) | 1990-02-27 | 1991-02-27 | Pre-reduction furnace from a smelting plant for iron ore |
| CN 91101209 CN1025437C (en) | 1990-02-27 | 1991-02-27 | Prereduction furnace of smelting reduction facility of iron ore |
| KR1019910003217A KR930009414B1 (en) | 1990-02-27 | 1991-02-27 | Prereduction furnace of a smelting reduction facility of iron ore |
| ES91102928T ES2090154T3 (en) | 1990-02-27 | 1991-02-27 | PRE-REDUCTION FURNACE OF A REDUCTION FACILITY FOR IRON MINERAL FUSION. |
| EP91102928A EP0444634B1 (en) | 1990-02-27 | 1991-02-27 | Prereduction furnace of a smelting reduction facility of iron ore |
| AT91102928T ATE138417T1 (en) | 1990-02-27 | 1991-02-27 | PRE-REDUCTION FURNACE OF A PLANT FOR THE MELTING REDUCTION OF IRON ORE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2044372A JP2536216B2 (en) | 1990-02-27 | 1990-02-27 | Dispersion disk of preliminary reduction furnace in smelting reduction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03247715A true JPH03247715A (en) | 1991-11-05 |
| JP2536216B2 JP2536216B2 (en) | 1996-09-18 |
Family
ID=12689682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2044372A Expired - Fee Related JP2536216B2 (en) | 1990-02-27 | 1990-02-27 | Dispersion disk of preliminary reduction furnace in smelting reduction equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2536216B2 (en) |
| ZA (1) | ZA911388B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847216A (en) * | 1981-09-16 | 1983-03-18 | Yokogawa Hokushin Electric Corp | Mass flow meter |
| JPS6276896U (en) * | 1985-10-28 | 1987-05-16 | ||
| JPS62228880A (en) * | 1986-03-28 | 1987-10-07 | 川崎重工業株式会社 | Dispersing plate for fluidized bed |
-
1990
- 1990-02-27 JP JP2044372A patent/JP2536216B2/en not_active Expired - Fee Related
-
1991
- 1991-02-26 ZA ZA911388A patent/ZA911388B/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847216A (en) * | 1981-09-16 | 1983-03-18 | Yokogawa Hokushin Electric Corp | Mass flow meter |
| JPS6276896U (en) * | 1985-10-28 | 1987-05-16 | ||
| JPS62228880A (en) * | 1986-03-28 | 1987-10-07 | 川崎重工業株式会社 | Dispersing plate for fluidized bed |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA911388B (en) | 1992-10-28 |
| JP2536216B2 (en) | 1996-09-18 |
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