JPS6153402B2 - - Google Patents
Info
- Publication number
- JPS6153402B2 JPS6153402B2 JP17110381A JP17110381A JPS6153402B2 JP S6153402 B2 JPS6153402 B2 JP S6153402B2 JP 17110381 A JP17110381 A JP 17110381A JP 17110381 A JP17110381 A JP 17110381A JP S6153402 B2 JPS6153402 B2 JP S6153402B2
- Authority
- JP
- Japan
- Prior art keywords
- reduced iron
- furnace
- melting
- induction heating
- ladle
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 30
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 11
- 238000007670 refining Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Furnace Charging Or Discharging (AREA)
- Manufacture Of Iron (AREA)
Description
【発明の詳細な説明】
この発明は、焼成炉にて還元鉄を製造し、例え
ば電気炉や転炉等溶解精錬炉で溶解精錬する製鉄
プロセスにおける還元鉄の溶解精錬炉への装入方
法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for charging reduced iron into a melting and refining furnace in an iron manufacturing process in which reduced iron is produced in a firing furnace and then melted and refined in a melting and refining furnace such as an electric furnace or a converter. .
ペレタイザーにて造粒された製鉄原料は、予熱
器で予熱された後、焼成炉の窯尻から還元剤（石
炭またはコークス）及び脱硫剤と共に投入され、
焼成炉を回転させることによつて、これらの投入
物を焼成炉の焚口側に向つて移動させ、さらに焼
成炉の焚口側に設けたバーナで加熱することによ
つて混入した石炭またはコークスの炭素分と、原
料中の酸素とを化学反応させて原料を還元するも
のである。 After being preheated in a preheater, the ironmaking raw material granulated in a pelletizer is charged into the kiln bottom of the kiln together with a reducing agent (coal or coke) and a desulfurizing agent.
By rotating the kiln, these input materials are moved toward the kiln's firing side, and are further heated by a burner installed at the kiln's kiln's kiln, thereby removing the mixed coal or coke carbon. The raw material is reduced by chemically reacting the oxygen in the raw material with the oxygen contained in the raw material.
従来はこのようにして焼成した還元鉄をクーラ
で冷却した後、例えば電気炉に装入しているが、
熱エネルギーの損失が大きいため、最近では焼成
炉から取出した還元鉄を、外気を遮断したホツト
コンテナに入れクレーン等の搬送機により、別置
された電気炉に搬送して装入させるようになつて
いる。この後者による方法は、エネルギーを節約
する点では有利であるが、溶鋼の比重（約7.5）
に比べて還元鉄の嵩比重（約1.4）が小さいた
め、還元鉄の運搬に大容量のコンテナを必要とす
るし、又焼成炉から排出される高温（約1050℃）
の還元鉄をコンテナに入れて搬送するものである
からコンテナ内下層の還元鉄が溶着をおこし、コ
ンテナからの排出が不能となるおそれがある。 Conventionally, reduced iron fired in this way is cooled in a cooler and then charged into, for example, an electric furnace.
Since the loss of thermal energy is large, recently the reduced iron taken out from the kiln is placed in a hot container that is shut off from the outside air, and then transported by a crane or other transport device to a separate electric furnace for charging. ing. This latter method is advantageous in terms of saving energy, but the specific gravity of molten steel (approximately 7.5)
Since the bulk specific gravity (approximately 1.4) of reduced iron is smaller than that of iron, a large-capacity container is required to transport the reduced iron, and the high temperature (approximately 1050℃) discharged from the kiln is
Because reduced iron is transported in a container, there is a risk that the reduced iron in the lower layer inside the container may cause welding, making it impossible to discharge it from the container.
この発明は、こうした前記従来の問題点を除去
するために開発されたもので、以下、図面に示す
実施例にもとづいて説明する。 The present invention was developed to eliminate these conventional problems, and will be described below based on embodiments shown in the drawings.
１はロータリキルン、２は該ロータリキルン１
の製品出口側を蓋被するように設けられたフード
で、その内部には、ロータリキルン１の製品出口
に臨ませたホツトスクリーン３を有し、該ホツト
スクリーン３の前端部下方と、スクリーン直下に
夫々ホツパ２ａ，２ｂが形成されている。ホツパ
２ａの下端には上下に開閉自在のベル４をそなえ
たシールチヤンバ５と、該シールチヤンバ５に接
続して開閉自在のベル６をそなえたシユート樋７
が設けられ、その先端に臨ませた誘導加熱炉８に
連通されている。１０はホツパ２ｂの下端開口部
に臨ませた還元剤冷却用のクーラである。 1 is a rotary kiln, 2 is the rotary kiln 1
This hood is provided to cover the product outlet side of the rotary kiln 1, and has a hot screen 3 facing the product outlet of the rotary kiln 1 inside. Hoppers 2a and 2b are formed in each of the hoppers 2a and 2b, respectively. At the lower end of the hopper 2a, there is a seal chamber 5 equipped with a bell 4 that can be opened and closed vertically, and a chute gutter 7 that is connected to the seal chamber 5 and equipped with a bell 6 that can be opened and closed.
is provided, and communicates with an induction heating furnace 8 facing the tip thereof. Reference numeral 10 denotes a cooler for cooling the reducing agent, which faces the opening at the lower end of the hopper 2b.
この発明は以上の構成からなるので、所定の工
程を経て焼成された還元鉄は、還元剤と共にロー
タリキルン１の製品出口からホツトスクリーン３
上に放出され、ホツトスクリーン３の篩作用によ
り還元鉄と還元剤とに分離される。このようにし
て仕分けられた還元鉄は、ホツトスクリーン３の
先端部からホツパ２ａに投入され、さらにベル
４，６の開動により、ホツパ２ａの下端開口部か
ら順次、シールチヤンバ５、シユート樋７を経て
誘導加熱炉８に装入される。このとき誘導加熱炉
８は、加熱状態にあつて順次装入される還元鉄を
溶解する（第２図参照）。還元鉄の装入が一定量
に達すると、その溶解が完了するまで一旦ベル
４，６を第１図の如く閉動する。この閉動により
フード２内はシールされ還元鉄の再酸化が防止さ
れることになる。 Since the present invention has the above configuration, the reduced iron fired through the predetermined process is passed from the product outlet of the rotary kiln 1 to the hot screen 3 together with the reducing agent.
The iron is released to the top and is separated into reduced iron and reducing agent by the sieving action of the hot screen 3. The reduced iron thus sorted is fed into the hopper 2a from the tip of the hot screen 3, and then, by the opening of the bells 4 and 6, it is sequentially passed through the seal chamber 5 and the chute 7 from the opening at the lower end of the hopper 2a. It is charged into the induction heating furnace 8. At this time, the induction heating furnace 8 is in a heated state and melts the reduced iron that is sequentially charged (see FIG. 2). When the charging of reduced iron reaches a certain amount, the bells 4 and 6 are temporarily closed as shown in FIG. 1 until the melting is completed. This closing action seals the inside of the hood 2 and prevents the reduced iron from being reoxidized.
誘導加熱炉８にて溶解された還元鉄は、図示さ
れてないクレーン等によつて誘導加熱炉８の注湯
口９に臨ませるように運ばれたレードル１１に装
入した後、クレーン操作により該レードルを別置
された溶解精錬炉まで搬送し、レードル内の溶鋼
を溶解精錬炉内に装入する操作が行われる。 The reduced iron melted in the induction heating furnace 8 is charged into a ladle 11 which is carried by a crane or the like (not shown) so as to face the pouring spout 9 of the induction heating furnace 8, and then the reduced iron is poured into the ladle 11 by a crane operation. The ladle is transported to a separate melting and refining furnace, and the molten steel in the ladle is charged into the melting and refining furnace.
一方ホツトスクリーン３にて分離された高温の
還元剤は、クーラ９にて冷却された後再使用に供
される。 On the other hand, the high temperature reducing agent separated by the hot screen 3 is cooled by the cooler 9 and then reused.
以上の通り、この発明はロータリキルンの製品
出口に接続したフード下端に誘導加熱炉を設け、
この誘導加熱炉によつて、ロータリキルンで焼成
された還元鉄を高温状態で溶解した後、溶鋼とし
てレードルに取出し、これを別置の溶解精錬炉に
装入して溶解精錬するようにしたため、焼成熱を
有効に利用することができ、又誘導加熱炉から溶
鋼をレードルに取出した状態で、上面に浮くスラ
グを除去して溶解精錬炉への装入が可能であり、
効率のよい溶解精錬を行わせることができる等、
従来の問題点を解消し、発明所期の目的を確実に
達成することができる。 As described above, this invention provides an induction heating furnace at the lower end of the hood connected to the product outlet of the rotary kiln,
Using this induction heating furnace, the reduced iron fired in the rotary kiln is melted at a high temperature, then taken out as molten steel into a ladle, and then charged into a separate melting and refining furnace for melting and refining. The firing heat can be used effectively, and while the molten steel is taken out from the induction heating furnace into the ladle, it is possible to remove the slag floating on the top surface and charge it into the melting and refining furnace.
Efficient melting and refining can be carried out, etc.
It is possible to solve the conventional problems and reliably achieve the intended purpose of the invention.
図面は本発明の実施に好適な実施態様を示すも
ので、第１図は溶鋼取出状態の正面断面図、第２
図は還元鉄溶解時の正面断面図である。
１……ロータリキルン、２……フード、２ａ，
２ｂ……ホツパ、３……ホツトスクリーン、４，
６……ベル、５……シールチヤンバ、７……シユ
ート樋、８……誘導加熱炉、９……注湯口、１０
……クーラ、１１……レードル。
The drawings show embodiments suitable for carrying out the present invention, and FIG. 1 is a front cross-sectional view of the molten steel taken out,
The figure is a front sectional view when reduced iron is melted. 1...Rotary kiln, 2...Hood, 2a,
2b...hotspa, 3...hotscreen, 4,
6... Bell, 5... Seal chamber, 7... Shute gutter, 8... Induction heating furnace, 9... Pouring spout, 10
...Kula, 11...Ladle.
Claims (1)
解精錬する製鉄プロセスにおいて、焼成炉の製品
出口を蓋被するように接続したフード下端に誘導
加熱炉を設けるとともに、フード内に焼成炉の製
品出口から放出される焼成物を、還元鉄と還元剤
とに仕分けるホツトスクリーンを設け、還元鉄の
みを誘導加熱炉に導入して溶解し、溶鋼としてレ
ードルに取出し、該レードルのクレーン操作によ
つてレードル内の溶鋼を溶解精錬炉に装入させる
ようにしたことを特徴とする還元鉄の溶解精錬炉
への装入方法。1 In the iron manufacturing process in which reduced iron is manufactured in a firing furnace and melted and refined in a melting and refining furnace, an induction heating furnace is installed at the lower end of a hood connected to cover the product outlet of the firing furnace, and the firing furnace is installed in the hood. A hot screen is installed to separate the fired product discharged from the product outlet into reduced iron and reducing agent, and only the reduced iron is introduced into the induction heating furnace where it is melted and taken out as molten steel into a ladle, which is then operated by a crane. Therefore, a method for charging reduced iron into a melting and refining furnace, characterized in that the molten steel in the ladle is charged into the melting and refining furnace.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17110381A JPS5872877A (en) | 1981-10-26 | 1981-10-26 | Method of charging reduced iron into electric furnace |
| US06/434,455 US4436551A (en) | 1981-10-26 | 1982-10-15 | Process for making steel from direct-reduced iron |
| CA000413807A CA1197689A (en) | 1981-10-26 | 1982-10-20 | Process for making steel from direct-reduced iron |
| DE3239188A DE3239188C2 (en) | 1981-10-26 | 1982-10-22 | Process for making steel from direct reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17110381A JPS5872877A (en) | 1981-10-26 | 1981-10-26 | Method of charging reduced iron into electric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5872877A JPS5872877A (en) | 1983-04-30 |
| JPS6153402B2 true JPS6153402B2 (en) | 1986-11-18 |
Family
ID=15917028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17110381A Granted JPS5872877A (en) | 1981-10-26 | 1981-10-26 | Method of charging reduced iron into electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5872877A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61134449A (en) * | 1984-12-03 | 1986-06-21 | 積水化学工業株式会社 | Pillar connection apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4777056B2 (en) * | 2005-12-05 | 2011-09-21 | 新日本製鐵株式会社 | Raw material input control method |
-
1981
- 1981-10-26 JP JP17110381A patent/JPS5872877A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61134449A (en) * | 1984-12-03 | 1986-06-21 | 積水化学工業株式会社 | Pillar connection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5872877A (en) | 1983-04-30 |
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