JPS583906A - Manufacture of reduced iron - Google Patents
Manufacture of reduced ironInfo
- Publication number
- JPS583906A JPS583906A JP10098681A JP10098681A JPS583906A JP S583906 A JPS583906 A JP S583906A JP 10098681 A JP10098681 A JP 10098681A JP 10098681 A JP10098681 A JP 10098681A JP S583906 A JPS583906 A JP S583906A
- Authority
- JP
- Japan
- Prior art keywords
- pellets
- reduced iron
- metallization
- kiln
- reducing
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
この発明はロータリキルン等の焼成炉における還元鉄製
造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing reduced iron in a firing furnace such as a rotary kiln.
この種の製造工程においては、粉鉄鉱石をバインダーと
水の添加によって径１０〜１５鰭に造粒した生ペレット
を移動グレート炉１に送り、乾燥硬化させてロータリキ
ルン２に送る。この際、固体還元剤３および脱硫剤４が
同時に投入される。In this type of manufacturing process, raw pellets of powdered iron ore are granulated into diameters of 10 to 15 by adding a binder and water, and then sent to a moving grate furnace 1, dried and hardened, and sent to a rotary kiln 2. At this time, the solid reducing agent 3 and the desulfurizing agent 4 are added at the same time.
キルン２内で還元されたペレットはクーラーで冷却され
成品となる。The pellets reduced in the kiln 2 are cooled in a cooler and turned into finished products.
ここで、キルン入口側から投入される還元剤が例えば石
油コークスのように反応性が低い場合、ペレットをキル
ン内で所定のヒートパターンで加熱還元し７た時、還元
炭材の揮発分あるいは脱硫剤によつ、て脱硫が促進され
、いずれの場合も希望値（例えば、硫黄分０．０３％）
以下となるが、さらに還元が進むと逆に加硫が起るとい
う問題が生じる。Here, when the reducing agent introduced from the kiln inlet side has low reactivity, such as petroleum coke, when the pellets are heated and reduced in the kiln with a predetermined heat pattern, volatile matter of the reduced carbonaceous material or desulfurization Desulfurization is promoted by the agent, and in both cases the desired value (e.g. 0.03% sulfur content) is achieved.
As described below, if the reduction proceeds further, a problem arises in that vulcanization occurs.
この発明はこのよう寿問題点を解消すべく提案されたも
ので、そのＩ］的は高金属化率で低硫黄の還元鉄を得る
ことのできる還元鉄製造方法を提供することにある。This invention has been proposed to solve these longevity problems, and its purpose is to provide a method for producing reduced iron that can obtain reduced iron with a high metallization rate and low sulfur.
この発明に係る還元鉄製造方法は、いったん増加現象に
転じた硫黄分がある金属化率を境にして減少し希望値以
下となるのを利用したもので、金属化率が９０〜９５％
に達した後、さらにペレットを還元雰囲気内に少なくと
も１５分間置くようにしたものである。The method for producing reduced iron according to the present invention utilizes the fact that the sulfur content once starts to increase, but decreases after reaching a certain metallization rate and becomes below the desired value, and the metallization rate is 90 to 95%.
After reaching this temperature, the pellets were placed in a reducing atmosphere for at least 15 minutes.
以下この発明を図示する一実施例に基づいて説明する。The present invention will be described below based on an illustrated embodiment.
第２図はバッチ式焼成炉の場合、第３図は連続式焼成炉
の場合を示すグラフであり、このグラフから明らかなよ
うに金属化率が３０％程度までは硫黄分０．０３％の希
望値が得られるが、金属化が進むにつれて加流が起こる
。しかしながら金属化率が９０〜９５％に達すると硫黄
分が減少して希望値（００３％）以下となる。しだがっ
て本発明においては、金属化率が９０〜９５％に達した
後、さらにペレットを還元雰囲気内に少なくとも１５分
間放置しておく。これにより高金属化率で低硫黄率の還
元鉄が得られることになる。Figure 2 is a graph showing the case of a batch type firing furnace, and Figure 3 is a graph showing the case of a continuous type firing furnace. The desired value is obtained, but as the metallization progresses, a surge occurs. However, when the metallization rate reaches 90 to 95%, the sulfur content decreases to below the desired value (003%). Therefore, in the present invention, after the metallization rate has reached 90-95%, the pellets are further left in the reducing atmosphere for at least 15 minutes. As a result, reduced iron with a high metallization rate and a low sulfur rate can be obtained.
前述のとおりこの発明に係る還元鉄製造方法によれば、
高金属化率で低硫黄の還元鉄を容易に短時間で製造する
ことができる。As mentioned above, according to the method for producing reduced iron according to the present invention,
Reduced iron with high metallization rate and low sulfur can be easily produced in a short time.
第１図はこの発明に係る還元鉄製造方法に使用する製造
設備を示す概略図、第２図、第３図はペレットの金属化
率と硫黄含有率を示すグラフであり、第２図はバッチ式
焼成炉の場合、第３図は連続式焼成炉の場合である。
■・・・移動グレート炉、
２…ロータリキルン、
３・・・固体還元剤、
４・・・脱硫剤。
特許出願人住友重機械工業株式会社
第１図
第２図
βｊ盟 ｍｉｎFIG. 1 is a schematic diagram showing the manufacturing equipment used in the reduced iron manufacturing method according to the present invention, FIGS. 2 and 3 are graphs showing the metallization rate and sulfur content of pellets, and FIG. In the case of a type firing furnace, FIG. 3 shows the case of a continuous type firing furnace. ■...Moving grate furnace, 2...Rotary kiln, 3...Solid reducing agent, 4...Desulfurizing agent. Patent applicant Sumitomo Heavy Industries, Ltd. Figure 1 Figure 2 βj min
Claims (1)
焼成炉に投入しペレットを焼成する還元鉄製造方法にお
いて、焼成炉内のペレットの金属化率が９０〜９５％に
達した後、さらにこのペレットを還元雰囲気内に少なく
とも１５分間置くことを特徴とする還元鉄製造方法。(1) In a reduced iron manufacturing method in which granulated pellets are charged into a firing furnace together with a reducing agent and a desulfurizing agent and the pellets are fired, after the metallization rate of the pellets in the firing furnace reaches 90 to 95%, the A method for producing reduced iron, characterized in that the pellets are placed in a reducing atmosphere for at least 15 minutes.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098681A JPS583906A (en) | 1981-06-29 | 1981-06-29 | Manufacture of reduced iron |
| US06/354,337 US4409022A (en) | 1981-03-09 | 1982-03-03 | Method of producing low-sulfur, reduced, iron ore pellets |
| DE19823208477 DE3208477A1 (en) | 1981-03-09 | 1982-03-09 | METHOD FOR REDUCING IRON |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098681A JPS583906A (en) | 1981-06-29 | 1981-06-29 | Manufacture of reduced iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS583906A true JPS583906A (en) | 1983-01-10 |
| JPH0130889B2 JPH0130889B2 (en) | 1989-06-22 |
Family
ID=14288637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10098681A Granted JPS583906A (en) | 1981-03-09 | 1981-06-29 | Manufacture of reduced iron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS583906A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2853606A1 (en) * | 2013-09-30 | 2015-04-01 | Siemens VAI Metals Technologies GmbH | Method for allocating a level of suitability for a transformation method to a material used |
| US11255969B2 (en) | 2018-08-23 | 2022-02-22 | Mitutoyo Corporation | Measurement apparatus and measurement method |
| DE102021120543A1 (en) | 2020-08-18 | 2022-02-24 | Mitutoyo Corporation | MEASURING EQUIPMENT AND METHOD |
| DE102021120166A1 (en) | 2020-08-31 | 2022-03-03 | Mitutoyo Corporation | DATA CORRECTION DEVICE, MEASUREMENT SYSTEM, PROGRAM AND CORRECTION METHOD |
| US11415406B2 (en) | 2019-12-18 | 2022-08-16 | Mitutoyo Corporation | Single sideband frequency modulated laser measurement for detecting a difference in a propagation distance |
| DE102022102743A1 (en) | 2021-02-24 | 2022-08-25 | Mitutoyo Corporation | MEASURING DEVICE AND METHOD |
-
1981
- 1981-06-29 JP JP10098681A patent/JPS583906A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2853606A1 (en) * | 2013-09-30 | 2015-04-01 | Siemens VAI Metals Technologies GmbH | Method for allocating a level of suitability for a transformation method to a material used |
| US11255969B2 (en) | 2018-08-23 | 2022-02-22 | Mitutoyo Corporation | Measurement apparatus and measurement method |
| US11415406B2 (en) | 2019-12-18 | 2022-08-16 | Mitutoyo Corporation | Single sideband frequency modulated laser measurement for detecting a difference in a propagation distance |
| DE102021120543A1 (en) | 2020-08-18 | 2022-02-24 | Mitutoyo Corporation | MEASURING EQUIPMENT AND METHOD |
| DE102021120166A1 (en) | 2020-08-31 | 2022-03-03 | Mitutoyo Corporation | DATA CORRECTION DEVICE, MEASUREMENT SYSTEM, PROGRAM AND CORRECTION METHOD |
| DE102022102743A1 (en) | 2021-02-24 | 2022-08-25 | Mitutoyo Corporation | MEASURING DEVICE AND METHOD |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0130889B2 (en) | 1989-06-22 |
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