JPH03274211A - Method for supplying pre-reduced iron ore into smelting reduction furnace - Google Patents
Method for supplying pre-reduced iron ore into smelting reduction furnaceInfo
- Publication number
- JPH03274211A JPH03274211A JP2072065A JP7206590A JPH03274211A JP H03274211 A JPH03274211 A JP H03274211A JP 2072065 A JP2072065 A JP 2072065A JP 7206590 A JP7206590 A JP 7206590A JP H03274211 A JPH03274211 A JP H03274211A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- reduction furnace
- ore
- pressure
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000003723 Smelting Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000007664 blowing Methods 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 42
- 239000002994 raw material Substances 0.000 description 11
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000003575 carbonaceous material Substances 0.000 description 4
- 238000012432 intermediate storage Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000011261 inert gas Substances 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
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Landscapes
- Air Transport Of Granular Materials (AREA)
- Manufacture Of Iron (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いて、予備還元
炉で予備還元された鉄鉱石（以下、単に鉱石という）を
、その量を制御しつつ溶融還元炉内に供給するための方
法に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention is an iron ore smelting and reduction equipment that controls the amount of iron ore (hereinafter simply referred to as ore) that has been pre-reduced in a pre-reduction furnace. The present invention relates to a method for supplying the same into a smelting reduction furnace.
鉄浴が収容された溶融還元炉内に鉱石および炭材を供給
し、前記溶融還元炉内に上方がらランスを通して酸素を
吹き込むことにより鉱石を溶融還元する、鉱石の溶融還
元設備が知られている。There is known ore smelting and reduction equipment that supplies ore and carbonaceous material into a smelting and reducing furnace containing an iron bath, and melting and reducing the ore by blowing oxygen into the smelting and reducing furnace from above through a lance. .
第２図は、このような溶融還元設備の概略説明図である
。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、溶融還元炉（１）内に供給される主原料の
鉱石を予備還元するため、溶融還元炉（１）の上方に設
けられる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. 2 is a schematic explanatory diagram of such melting reduction equipment. As shown in the figure, the smelting reduction equipment includes a converter-type smelting reduction furnace (1) and a smelting reduction furnace (1) for pre-reducing ore, which is the main raw material supplied to the smelting reduction furnace (1). It consists of a fluidized tank-type preliminary reduction furnace (2) provided above, a storage tank (3) for main raw materials, and a storage tank (4) for auxiliary raw materials.
溶融還元炉（１）は、転炉型の炉体（５）と、該炉体（
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（５ａ）を
覆うフード（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ト（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 the furnace body (
A lance (6) vertically inserted into the furnace body (5) through the furnace mouth (5a) of 5), and a stirring gas inlet (7) provided on the bottom wall and side wall of the furnace body (5). , a main raw material supply chute (
9), an auxiliary raw material supply chute (10), and a gas discharge port (11).
予備還元炉（２）は、多数のノズル（１３）を有し、炉
内下部に設けられた分散盤（１２）と、該分散盤（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（１２）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 pre-reduction furnace (2) has a large number of nozzles (13), a dispersion plate (12) provided at the lower part of the furnace, and a dispersion plate (12).
) and a preliminary reduction chamber (15) formed in the furnace above the distribution plate (12). The gas blowing chamber (14) is provided with a gas blowing port (16), and the preliminary reduction chamber (15) is provided with a gas blowing port (16).
is equipped with a raw material supply chute (17) and a gas outlet (
18) is provided.
分散盤（１２）の上面は、すりばち状に形成されており
、その中央部の排出孔（１２ａ）には、予備還元された
鉱石の排出管（１９）が取り付けられている。The upper surface of the dispersion plate (12) is formed into a mortar shape, and a discharge pipe (19) for pre-reduced ore is attached to a discharge hole (12a) in the center thereof.
この排出管（１９）は、予備還元炉（２）の底壁を貫通
して下方に伸び、水平管（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。This discharge pipe (19) extends downward through the bottom wall of the pre-reduction furnace (2), passes through a horizontal pipe (20) and two intermediate storage tanks (21), and then passes through the chute of the smelting reduction furnace (1). (9).
溶融還元炉（１）のフード（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 hood (8) of the smelting 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どこのガス排出管（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).
A dust collecting cyclone (25) is provided in the middle.
主原料用の貯槽（３）と、予備還元炉（２）の原料供給
用シュート（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 chute (17) of the preliminary reduction furnace (2) are connected by a duct (26), and the auxiliary raw material storage tank (4) and and the auxiliary raw material supply chute (10) of the melting reduction furnace (1) are connected by a duct (27).
以上のような設備では、溶融還元炉（１）内に所定量の
溶鉄（２８）を収容し、シュート（９）を通して、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）を通して、副原料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-mentioned equipment, a predetermined amount of molten iron (28) is stored in the smelting reduction furnace (1), and is passed through the chute (9) to a prereduced main material having a predetermined particle size in the prereduction furnace (2). The ore is supplied into the smelting reduction furnace (1), and
Through the chute (10), carbonaceous materials such as coal as auxiliary raw materials and flux are supplied into the melting reduction furnace (1).
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）を通して、炉内に酸素ガス
を吹き込むとともに、炉体（５）の底壁および側壁に設
けられたガス吹込口（７）を通して、炉内の溶鉄（２８
）中に、窒素ガス等の撹拌用ガスを吹込む。Oxygen gas is blown into the furnace through the lance (6) vertically inserted into the furnace body (5) from the furnace mouth (5a) of the melting reduction furnace (1), and the bottom wall and side walls of the furnace body (5) are blown into the furnace. Molten iron in the furnace (28
), blow a stirring gas such as nitrogen gas into it.
炉内に供給された炭材および溶鉄（２８）の炭素と、ラ
ンス（６）を通して吹き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）
を通して吹き込まれた過剰の酸素ガスと反応してＣＯ２
ガスとなる。このとき発生したＣＯ２ガスの顕熱により
、溶鉄（２８）中の鉱石は溶融し、炭材中の炭素により
還元されて溶銑となる。The carbon of the carbon material and molten iron (28) supplied into the furnace reacts with the oxygen gas blown through the lance (6) to generate CO gas.
CO2 reacts with excess oxygen gas blown through the
It becomes 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）およびシュート（１７）
を通って供給された予備還元室（１５）内の所定粒度の
鉱石（２９）を、流動状態で予熱且つ予備還元する。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 storage tank (3) to duct (26) and chute (17)
The ore (29) of a predetermined particle size fed through the pre-reduction chamber (15) is preheated and pre-reduced in a fluidized state.
このようにして予備還元された構成は１分散盤（１２）
の排出孔（１２ａ）に取付けられた排出管（１９）を通
して予備還元炉（２）内から排出され、水平管（２０）
を経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、熱効率を向上されるこ
とができる。The configuration pre-reduced in this way is one distributed disk (12)
It is discharged from the pre-reduction furnace (2) through the discharge pipe (19) attached to the discharge hole (12a) of the horizontal pipe (20).
are temporarily stored alternately in two intermediate storage tanks (21), and then cut out alternately from the two intermediate storage tanks (21),
It is 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.
上述したように予備還元炉（２）内において予備還元さ
れた鉱石は、その量を制御しつつ溶融還元炉（１）内に
供給することが必要である。As mentioned above, the ore pre-reduced in the pre-reduction furnace (2) needs to be supplied into the smelting reduction furnace (1) while controlling its amount.
このため、従来法のような方法が行なわれている。即ち
、第３図に供給機構部分の概略説明図で示すように、予
備還元炉（図示せず）の下部に下方に向けて垂直に設け
られた排出管（１９）に接続された第１導管（３０）の
下端に、第１導管（３０）と直交する水平管（２０）を
設け、水平管（２０）の端部には、溶融還元炉（１）に
至る第２導管（３１）を垂直に取付ける。そして、水平
管（２０）の一端には、水平管（２０）内に水平にガス
を吹込むためのガス噴出管（３２）を取付ける。For this reason, conventional methods are used. That is, as shown in the schematic explanatory diagram of the supply mechanism part in FIG. 3, a first conduit is connected to a discharge pipe (19) provided vertically downward at the bottom of a preliminary reduction furnace (not shown). A horizontal pipe (20) that is orthogonal to the first pipe (30) is provided at the lower end of the (30), and a second pipe (31) leading to the melting reduction furnace (1) is provided at the end of the horizontal pipe (20). Mount vertically. A gas ejection pipe (32) for horizontally blowing gas into the horizontal pipe (20) is attached to one end of the horizontal pipe (20).
第１導管（３０）を経て水平管（２０）内に落下した鉱
石（２９）は、水平管（２０）内において安息角を形威
し滞留する。このようにして水平管（２０）内に滞留し
ている鉱石に向け、ガス噴出管（３２）から不活性ガス
を噴射すると、滞留している鉱石の安息角が崩れ、鉱石
は第２導管（３１）に向けて吹き飛ばされる。The ore (29) that has fallen into the horizontal pipe (20) through the first conduit (30) remains in the horizontal pipe (20) forming an angle of repose. When inert gas is injected from the gas jet pipe (32) toward the ore accumulated in the horizontal pipe (20) in this way, the angle of repose of the accumulated ore collapses, and the ore is transferred to the second conduit ( 31) is blown away.
このような、ガス噴出管（３２）からの不活性ガスの噴
射を一定パルスで行なうことにより、鉱石は一定間隔で
その量を制御されつつ溶融還元炉（１）内に供給される
。By injecting the inert gas from the gas jet pipe (32) in constant pulses, the ore is supplied into the smelting reduction furnace (1) at regular intervals while its amount is controlled.
上述のような方法によって、予備還元された鉱石を一定
間隔でその量を制御しつつ溶融還元炉内に供給するに当
り、水平管（２０）の入側における第１導管（３０）側
の管内圧力と、水平管（２０）の出側における第２導管
（３１）側の管内圧力との差が大になると、第３図に矢
印で示すような、第１導管（３０）から水平管（２０）
を経て第２導管（３１）に向かうガスの流れが発生する
。In supplying the pre-reduced ore into the smelting reduction furnace while controlling the amount at regular intervals by the method described above, the inside of the pipe on the first conduit (30) side on the entry side of the horizontal pipe (20). When the difference between the pressure and the pressure inside the pipe on the outlet side of the horizontal pipe (20) on the second pipe (31) side becomes large, the flow from the first pipe (30) to the horizontal pipe ( 20)
A flow of gas is generated through the second conduit (31).
このガスの流れのために、水平管（２０）内に滞留して
いる鉱石の安息角が崩れ、水平管（２０）内に落下した
鉱石（２９）は、管内に滞留することなく、連続的に第
２導管（３１）に排出される。Due to this gas flow, the angle of repose of the ore staying in the horizontal pipe (20) collapses, and the ore (29) that falls into the horizontal pipe (20) does not stay in the pipe and continues to flow. is then discharged to the second conduit (31).
この結果、溶融還元炉への鉱石供給量の制御が不可能に
なるという問題が発生する。As a result, a problem arises in that it becomes impossible to control the amount of ore supplied to the smelting reduction furnace.
従って、この発明の目的は、鉱石の溶融還元設備におい
て、予備還元炉で予備還元された鉱石を、その量を制御
しつつ一定間隔で溶融還元炉内に供給することができる
方法を提供することにある。Therefore, an object of the present invention is to provide a method for supplying ore pre-reduced in a pre-reduction furnace to the smelter-reduction furnace at regular intervals while controlling the amount of ore pre-reduced in an ore smelting-reduction facility. It is in.
この発明は、予備還元炉から排出された鉱石を溶融還元
炉内に供給するため、前記予備還元炉の下部に下方に向
けて垂直に取付けられた第１導管の下端に、端部に溶融
還元炉に至る第２導管が垂直に取付けられた水平管を設
け、前記第１導管から前記水平管内に落下して滞留した
鉱石に向け、前記水平管の一端または中央部から、一定
パルスでガスを吹込むことにより鉱石を前記第２導管に
向けて吹き飛ばし、鉱石を、前記第２導管を経て溶融還
元炉内にその量を制御しつつ供給する方法において、前
記水平管の入側における前記第１導管側の管内圧力と、
前記水平管の出側における前記第２導管側の管内圧力と
が、予備還元された鉱石が前記水平管内に所定時間滞留
し得る圧力差となるように、前記第１導管側および前記
第２導管側の何れか一方の管内圧力を制御することをそ
の特徴とする。In order to supply the ore discharged from the pre-reduction furnace into the smelting reduction furnace, the lower end of the first conduit, which is vertically attached to the lower part of the pre-reduction furnace, is provided with an end portion for smelting reduction. A horizontal pipe to which a second pipe leading to the furnace is vertically installed is provided, and gas is supplied in constant pulses from one end or the center of the horizontal pipe toward the ore that has fallen and accumulated in the horizontal pipe from the first pipe. In the method of blowing ore toward the second conduit by blowing, and supplying the ore into the smelting reduction furnace through the second conduit while controlling the amount, the first The pressure inside the pipe on the conduit side,
the first conduit side and the second conduit side so that the pressure inside the pipe on the second conduit side at the exit side of the horizontal pipe is a pressure difference that allows the pre-reduced ore to remain in the horizontal pipe for a predetermined time. Its feature is that it controls the pressure inside the pipe on either side.
次に、この発明の方法を、図面を参照しながら説明する
。Next, the method of the present invention will be explained with reference to the drawings.
第１図は、この発明の方法の一実施態様を示す供給機構
部分の概略説明図である。第１図に示すように、予備還
元炉（図示せず）の下部に下方に向けて垂直に設けられ
た排出管（１９）に接続された第１導管（３０）の下端
に、第１導’１（３０）と直交するようにして水平管（
２０）が設けられ、水平管（２ｏ）の端部には、溶融還
元炉（１）に至る第２導’１（３１）が垂直に取付けら
れ、さらに、水平管（２ｏ）の一端には、水平管（２０
）内に水平に不活性ガスを吹込むためのガス噴出管（３
２）が取付けられていることは、従来と同様である。FIG. 1 is a schematic explanatory diagram of a supply mechanism portion showing one embodiment of the method of the present invention. As shown in FIG. 1, a first conduit (30) is connected to the lower end of a first conduit (30) connected to a discharge pipe (19) vertically provided at the bottom of a pre-reduction furnace (not shown). '1 (30) and the horizontal pipe (
20), a second conductor 1 (31) leading to the melting reduction furnace (1) is vertically attached to the end of the horizontal pipe (2o), and a , horizontal pipe (20
) for blowing inert gas horizontally into the gas jet pipe (3).
2) is attached as in the conventional case.
この発明においては、第２導管（３１）の途中に、排気
弁（３３）が取付けられ、また、第１導管（３０）およ
び第２導管（３１）に、それぞれ圧力計（３４） （３
５）が取付けられている。In this invention, an exhaust valve (33) is installed in the middle of the second conduit (31), and a pressure gauge (34) (3
5) is installed.
第１導管（３０）を経て水平管（２０）に落下した鉱石
が、水平管（２０）内において安息角を形成し滞留し得
るような、第１導管（３０）内の圧力Ｐ１と第２導管（
３１）内の圧力Ｐ２との圧力差を設定する。The pressure P1 in the first conduit (30) and the second conduit(
31) Set the pressure difference with the pressure P2 in .
水平管（２０）の入側における第１導管（３０）内の圧
力Ｐ１を圧力計（３４）によって測定するとともに、水
平管（２０）の出側における第２導管（３１）内の圧力
Ｐ２を圧力計（３５）によって測定し、両者の圧力差ｐ
、−ｐ、を求める。The pressure P1 in the first conduit (30) on the inlet side of the horizontal tube (20) is measured by the pressure gauge (34), and the pressure P2 in the second conduit (31) on the outlet side of the horizontal tube (20) is measured. Measured by a pressure gauge (35), the pressure difference between the two p
, -p.
圧力計（３４）および（３５）によって測定した。第１
導管（３０）内の圧力ＰＬと、第２導管（３１）内の圧
力Ｐ２との差Ｐｉ−Ｐオが、上述の設定値を超えたら。Measured by pressure gauges (34) and (35). 1st
When the difference Pi-Po between the pressure PL in the conduit (30) and the pressure P2 in the second conduit (31) exceeds the above-mentioned set value.
排気弁（３３）を操作し、上記設定値の範囲内となるよ
うに、第２導管（３１）内の圧力を調整する。The exhaust valve (33) is operated to adjust the pressure in the second conduit (31) so that it is within the range of the above set value.
例えば、予備還元炉の鉱石処理能力が５ Ｔ／Ｈの場合
、上述した圧力差Ｐ１−Ｐ２は、 ０．２ｋｇ／ａＩｌ
”以内であることが必要である。For example, when the ore processing capacity of the preliminary reduction furnace is 5 T/H, the pressure difference P1-P2 mentioned above is 0.2 kg/al
” must be within
なお、排気弁（３３）は、第１導管（３０）の途中に設
けても、また、第１導管（３０）および第２導管（３１
）の両方に設けてもよい。Note that the exhaust valve (33) may be provided in the middle of the first conduit (30), or may be provided between the first conduit (30) and the second conduit (31).
) may be provided on both.
この発明の方法によれば、水平管（２０）の入側におけ
る第１導管（３０）側の管内圧力と、水平管（２０）の
出側における第２導管（３１）側の管内圧力とが、水平
管（２０）内において鉱石が安息角を形成し滞留し得る
圧力差となるように制御されている。According to the method of the present invention, the pressure inside the first pipe (30) on the inlet side of the horizontal pipe (20) and the pressure inside the second pipe (31) on the outlet side of the horizontal pipe (20) are equal to each other. The pressure difference is controlled so that the ore can form an angle of repose and remain in the horizontal pipe (20).
従って、第１導管（３０）を経て水平管（２０）内に落
下した鉱石（２９）は、水平管（２０）内において安息
角を形成して滞留し、ガス噴出管（３２）からの−定パ
ルスのガス噴射により、一定間隔で溶融還元炉内に供給
される。Therefore, the ore (29) that has fallen into the horizontal pipe (20) through the first conduit (30) remains at an angle of repose within the horizontal pipe (20), and the - The gas is supplied into the smelting reduction furnace at regular intervals by constant pulsed gas injection.
以上述べたように、この発明によれば、鉱石の溶融還元
設備において、予備還元炉で予備還元された鉱石を、そ
の量を制御しつつ一定間隔で溶融還元炉内に供給するこ
とができるという工業上有用な効果がもたらされる。As described above, according to the present invention, in the ore smelting reduction equipment, the ore pre-reduced in the pre-reduction furnace can be supplied into the smelting-reduction furnace at regular intervals while controlling the amount. Industrially useful effects are produced.
第１図は、この発明の方法の一実施態様を示す供給機構
部分の概略説明図、第２図は溶融還元設備の概略説明図
、第３図は従来の供給機構部分の概略説明図である。図
面において、（１）・・・溶融還元炉、 （２）
・・・予備還元炉、（３）、（４）・・・貯 槽、
（５）・・・炉 体、（６）・・・ランス、
（７）・・・ガス吹込口、（８）・・・ツ
ー ド、 （９）、（１０）・・・シュート。
（１１）・・・ガス排出口、 （１２）・・・分
散盤。
（１２ａ）・・・排出孔、
（１４）・・・ガス吹込室、
（１６）・・・ガス吹込口、
（１８）・・・ガス排出口、
（２０）・・・水平管、
（２２）・・・ガス導管、
（２４）・・・ガス排出管、
（２８）・・・溶 鉄、
（３０）・・・第１導管、
（３２）・・・ガス噴出管。
（３４） 、 （３５）・・・圧力計。
（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）・・・
鉱 石、
（３１）・・・第２導管。
（３３）・・・排出弁、
第１図
３
第３図
５９−FIG. 1 is a schematic explanatory diagram of a supply mechanism part showing an embodiment of the method of the present invention, FIG. 2 is a schematic explanatory diagram of a melting reduction equipment, and FIG. 3 is a schematic explanatory diagram of a conventional supply mechanism part. . In the drawings, (1)...melting reduction furnace, (2)
...Preliminary reduction furnace, (3), (4)...storage tank,
(5)...Furnace body, (6)...Lance,
(7)... Gas inlet, (8)... Tube, (9), (10)... Chute. (11)...Gas exhaust port, (12)...Distribution board. (12a)...Discharge hole, (14)...Gas blowing chamber, (16)...Gas blowing port, (18)...Gas exhaust port, (20)...Horizontal pipe, (22 )... Gas pipe, (24)... Gas discharge pipe, (28)... Molten iron, (30)... First pipe, (32)... Gas ejection pipe. (34), (35)...Pressure gauge. (13)...Nozzle, (15)...Preliminary reduction chamber, (17)...Chute, (19)...Discharge pipe, (21)...Intermediate storage tank, (23), (25)... )...Cyclone for dust collection. (26), (27)...Duct, (29)...
Ore, (31)...Second conduit. (33)...Discharge valve, Fig. 1 3 Fig. 3 59-
Claims (1)
元炉内に供給するため、前記予備還元炉の下部に下方に
向けて垂直に取付けられた第１導管の下端に、端部に溶
融還元炉に至る第２導管が垂直に取付けられた水平管を
設け、前記第１導管から前記水平管内に落下して滞留し
た鉄鉱石に向け、前記水平管の一端または中央部から、
一定パルスでガスを吹込むことにより鉄鉱石を前記第２
導管に向けて吹き飛ばし、鉄鉱石を、前記第２導管を経
て溶融還元炉内にその量を制御しつつ供給する方法にお
いて、 前記水平管の入側における前記第１導管側の管内圧力と
、前記水平管の出側における前記第２導管側の管内圧力
とが、予備還元された鉄鉱石が前記水平管内に所定時間
滞留し得る圧力差となるように、前記第１導管側および
前記第２導管側の何れか一方の管内圧力を制御すること
を特徴とする予備還元された鉄鉱石の溶融還元炉内への
供給方法。[Claims] In order to supply the pre-reduced iron ore discharged from the pre-reduction furnace into the smelting reduction furnace, a first conduit is provided at the lower end of the first conduit installed vertically downward in the lower part of the pre-reduction furnace. , a horizontal pipe is provided with a second pipe vertically attached to the end thereof leading to a smelting reduction furnace, and the iron ore that has fallen from the first pipe and remains in the horizontal pipe is directed to one end or the center of the horizontal pipe. from,
The iron ore is blown into the second layer by blowing gas with a constant pulse.
In the method of supplying iron ore by blowing it toward a conduit while controlling its amount into a smelting reduction furnace through the second conduit, the first conduit side and the second conduit side so that the internal pressure on the second conduit side at the outlet side of the horizontal pipe is such that the pre-reduced iron ore can remain in the horizontal pipe for a predetermined time. A method for supplying pre-reduced iron ore into a smelting reduction furnace, the method comprising controlling the pressure inside one of the pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2072065A JP2546018B2 (en) | 1990-03-23 | 1990-03-23 | A method for feeding pre-reduced iron ore into a smelting reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2072065A JP2546018B2 (en) | 1990-03-23 | 1990-03-23 | A method for feeding pre-reduced iron ore into a smelting reduction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03274211A true JPH03274211A (en) | 1991-12-05 |
| JP2546018B2 JP2546018B2 (en) | 1996-10-23 |
Family
ID=13478623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2072065A Expired - Lifetime JP2546018B2 (en) | 1990-03-23 | 1990-03-23 | A method for feeding pre-reduced iron ore into a smelting reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2546018B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145926A (en) * | 1987-12-02 | 1989-06-07 | Nippon Steel Corp | Transport device for pulverized granular substance |
-
1990
- 1990-03-23 JP JP2072065A patent/JP2546018B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01145926A (en) * | 1987-12-02 | 1989-06-07 | Nippon Steel Corp | Transport device for pulverized granular substance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2546018B2 (en) | 1996-10-23 |
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