JPS61163220A - Pretreatment of raw material to be sintered - Google Patents
Pretreatment of raw material to be sinteredInfo
- Publication number
- JPS61163220A JPS61163220A JP133085A JP133085A JPS61163220A JP S61163220 A JPS61163220 A JP S61163220A JP 133085 A JP133085 A JP 133085A JP 133085 A JP133085 A JP 133085A JP S61163220 A JPS61163220 A JP S61163220A
- Authority
- JP
- Japan
- Prior art keywords
- mixer
- pellet feed
- raw materials
- sintered
- raw material
- 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.)
- Pending
Links
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、焼結性に悪影響を及ばず微粉原料即ちペレッ
トフィードを配合する原料から焼結鉱を製造する際の焼
結原料の事前処理方法の改良に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for pre-treatment of sintered raw materials when producing sintered ore from raw materials for blending fine powder raw materials, that is, pellet feed, without adversely affecting sinterability. It concerns an improvement in the method.
（従来の技術）
通常、鉄鉱石はその粒度の大きさに応じて使用先が決め
られており、一般に約５０μ以下の微粉鉄鉱石はペレッ
ト原料（ペレットフィード）として使い、一方それよシ
も太きく８ｗよシも小さい範囲のものは焼結原料（′シ
ンターフィード）として使用されている。そして、ペレ
ットフィードはシンターフィードよシ低コストでかつ鉄
品位が高い。(Prior art) Iron ore is usually used according to its particle size, and fine iron ore with a particle size of about 50μ or less is generally used as a raw material for pellets (pellet feed); Those with a diameter as small as 8w are used as sintering raw materials ('sinter feed). Furthermore, pellet feed is lower in cost than sinter feed and has higher iron quality.
従来、上記ペレットフィードを使用する焼結鉱の製造に
おいては、ペレットフィード鉄鉱石、シンターフィード
鉄鉱石、石灰石環の副原料、及び燃料用粉コークスをそ
れぞれ別個の貯槽から所定配合となるように切出し、１
次ミキサーに投入する。このミキサーで混合、調湿、造
粒された原料は、更に２次ミキサーへ投入されて前工程
における造粒強化を図った後、移動格子型焼結設備に供
給され、焼成されて焼結鉱とされていた（％開開５８−
６４３２５号分繊参照）。Conventionally, in the production of sintered ore using the pellet feed described above, pellet-fed iron ore, sinter-fed iron ore, limestone ring auxiliary raw materials, and coke powder for fuel are each cut into predetermined proportions from separate storage tanks. ,1
Next, add it to the mixer. The raw materials mixed, humidity controlled, and granulated in this mixer are further fed into a secondary mixer to strengthen the granulation in the previous process, and then supplied to a moving grid type sintering equipment where they are fired and sintered ore. It was said that (% opening 58-
64325).
（発明が解決しようとする問題点）
しかしながら、上記の方法ではペレットフィードの配合
によって適正な擬似粒子が得られず、焼成時の通気性が
悪く、生産性が低下するという欠点がある。(Problems to be Solved by the Invention) However, the above method has the disadvantage that proper pseudo-particles cannot be obtained due to the combination of pellet feed, the air permeability during firing is poor, and productivity is reduced.
本発明は、ペレットフィード配合時の造粒性（平均擬似
粒径）、通気性を改善し、生産性を向上させることがで
きる焼結原料の事前処理方法を提供するものである。The present invention provides a method for pre-processing sintering raw materials that can improve granulation properties (average pseudo-particle size) and air permeability during pellet feed blending, and improve productivity.
（問題点を解決するための手段）
本発明の要旨は、粉コークスを配合せずペレットフィー
ドを配合しｆｃ焼結原料を１次ミキサーで調湿造粒し、
次いでこの調湿造粒物に粉コークスを添加して２次ミキ
サーで転動造粒することを特徴とする焼結原料の事前処
理方法にある。(Means for Solving the Problems) The gist of the present invention is to blend pellet feed without blending coke powder, and granulate the FC sintering raw material with humidity control in a primary mixer.
A method for pre-processing a sintering raw material is characterized in that coke powder is then added to the humidity-controlled granules and granulated by rolling in a secondary mixer.
（作用、実施例） 以下、本発明の詳細な説明する。(effect, example) The present invention will be explained in detail below.
通常、焼結原料の配合は、第５図に示した工程のように
各原料ホッパー１〜６がら各配合条件によってシンター
フィード、ペレットフィード、生石灰やベントナイト等
のバインダー、副原料、返鉱、粉コークスが定量切出し
され、全量１次ミキサー７で同時に調湿造粒が行なわれ
、その後段に更に造粒強化のため２次ミキサー８が配設
されている。それらミキサー７又は８はドラムミキサー
或ハノ々ンベレタイザーである。Normally, the sintering raw materials are mixed according to the mixing conditions in each raw material hopper 1 to 6, as shown in the process shown in Figure 5. A fixed amount of coke is cut out, and the entire amount is subjected to humidity control granulation at the same time in a primary mixer 7, and a secondary mixer 8 is disposed at the subsequent stage to strengthen the granulation. The mixer 7 or 8 is a drum mixer or a belletizer.
本発明は、第１図に示した工程のように、各原料ホツノ
々−１〜６から切出された原料を全量ミキ茗−７に入れ
ず、難造粒件の粉コークスのみミキサー８の直前又はミ
キサー８内で添加し、ペレットフィード配合時の造粒性
、通気性を改善し、生産性を向上させるものである。In the present invention, as in the process shown in FIG. It is added immediately before or in the mixer 8 to improve granulation properties and air permeability during pellet feed blending, thereby increasing productivity.
この点について、従来法並びに本発明法の実施例に基づ
いてさらに述べる。This point will be further described based on examples of the conventional method and the method of the present invention.
第６図、第７図、第８図は、前記従来法におけるペレッ
トフィード配合率と擬似粒度、通気度、生産率の関係を
示したものである。尚、焼結原料の配合条件は第１表に
示す通りで、これにはペレットフィードは含まれておら
ず、粉コークスは補正粉コークスで３．４％である。ペ
レットフィードはリオドセ（銘柄名）を使用し、第１表
の均鉱に逐次置換して行った。FIGS. 6, 7, and 8 show the relationship between the pellet feed blending ratio, pseudo particle size, air permeability, and production rate in the conventional method. The blending conditions of the sintering raw materials are as shown in Table 1, which does not include pellet feed, and the corrected coke powder content is 3.4%. Pellet feed was carried out by using Riodoce (brand name), which was successively replaced with the level ore shown in Table 1.
第１表
ペレットフィード配合率は逐次増加させ（０゜１５．３
０）、造粒用添加水分を６．０％、粉コークス添加量３
．４％一定で小型ドラムミキサーで１次造粒し、小型ド
ラムミキサー或いは小型Ａンペレタイザーにて２次造粒
を行なった後焼結試験鍋に装入し、焼成を行なった。Table 1 Pellet feed blending ratio was gradually increased (0°15.3
0), added moisture for granulation is 6.0%, amount of coke powder added is 3
．． Primary granulation was carried out using a small drum mixer at a constant rate of 4%, and secondary granulation was carried out using a small drum mixer or a small A pelletizer, and then the mixture was charged into a sintering test pot and fired.
造粒条件は、１次ミキサーで原料混合を３分間行ない、
その後再び１次ミキサーで調湿造粒を６分間行ない、次
に２次ミキサーで造粒を３分間行なった。The granulation conditions were as follows: raw materials were mixed for 3 minutes in the primary mixer;
Thereafter, humidity control granulation was performed again for 6 minutes using the primary mixer, and then granulation was performed for 3 minutes using the secondary mixer.
焼成条件は、点火温度１２ｏｏ℃、点火時間９０秒、点
火時負圧５００ ｔａＡＱで点火を行ない、吸引負圧１
５００ ｍＡｑ一定で焼成を行なった。焼結原料の層厚
は７５０簡とした。The firing conditions were as follows: ignition temperature: 120°C, ignition time: 90 seconds, negative pressure at the time of ignition: 500 taAQ, suction negative pressure: 1
Firing was performed at a constant pressure of 500 mAq. The layer thickness of the sintering raw material was 750 mm.
第６図、７図、８図から、ペレットフィード配合率が高
くなるに従って擬似粒度は直線的に細粒方向に向かい、
通気度は低下し、生産率も急激に低下することがわかる
。この現象は前記し友ペレットフィードの焼結性への悪
影響を明確に示している。From Figures 6, 7, and 8, as the pellet feed blending ratio increases, the pseudo particle size linearly moves toward fine grains.
It can be seen that the air permeability decreases and the production rate also decreases rapidly. This phenomenon clearly shows the negative effect of pellet feed on sinterability as described above.
本発明者らは第６図に示す擬似粒度が低下することに着
目し、ノ々インダーの使用、造粒機等の強化を行なわな
いで造粒強化を行なう方法として、難造粒件の粉コーク
スを１次造粒後に配合することで造粒性が向上すること
を見い出した。The present inventors focused on the decrease in the pseudo granularity shown in Figure 6, and developed a method for strengthening granulation without using a Nono Inder or strengthening the granulator, etc. It has been found that granulation properties can be improved by adding coke after primary granulation.
即ち、第１図に示す様に、粉コークスを１次ミキサー７
を通さず、他原料のみを１次ミキサー７で調湿造粒する
ことによｐ造粒強化を図シ（平均擬似粒径を向上せしめ
）、その後２次ミキサー８の直前又はミキサー８内で粉
コークスの添加を行゛ない、２次造粒を行なった。この
ときのペレットフィード配合率と擬似粒度、通気度、生
産率の関係を第２図、第３図、第４図に示す。尚、焼結
原料の配合条件、ペレットフィード配合法、ミキサー機
種、１次、２次の造粒条件は前記従来法と同一条件であ
る。又、第２．３．４図には従来法の実施結果を併記し
ている。That is, as shown in FIG.
By granulating only other raw materials in the primary mixer 7 without passing through the moisture, the granulation is strengthened (improving the average pseudo particle size), and then immediately before or within the secondary mixer 8. Secondary granulation was performed without adding coke powder. The relationships among the pellet feed blending ratio, pseudo particle size, air permeability, and production rate at this time are shown in FIGS. 2, 3, and 4. The blending conditions of the sintering raw materials, pellet feed blending method, mixer model, and primary and secondary granulation conditions are the same as those of the conventional method. In addition, Fig. 2.3.4 also shows the results of the conventional method.
第２．３．４図に示す様に、本発明により擬似粒度は大
巾に改善され、そのことにより通気性及び生産率も改善
され、特にペレットフィード配合率２０％でも従来法通
常原料（ペレットフィード無配合）並みの生産性を維持
できると共に、ペレットフィード配合率２０％′以下で
は従来法通常原料の生産性よりも向上した生産性を得る
ことができる。又、ペレットフィード配合率２０％以上
の高配合においても、従来法に比して生産性をあまり悪
化させずに焼結鉱を製造することができる。As shown in Figure 2.3.4, the present invention greatly improves the pseudo-particle size, which also improves air permeability and production rate.In particular, even when the pellet feed blending rate is 20%, the conventional raw material (pellet It is possible to maintain productivity comparable to that of the conventional method (without feed), and at a pellet feed content of 20%' or less, it is possible to obtain productivity that is higher than that of conventional raw materials. Furthermore, even at a high pellet feed blending ratio of 20% or more, sintered ore can be produced without much deterioration in productivity compared to conventional methods.
（発明の効果）
以上詳述した様に、例えばシンターフィードの一部をペ
レットフィードに置換してペレットフィードを配合した
低コスト焼結原料を調湿造粒するに際して、粉コークス
を２次ミキザー直前又はミキサー内で添加することによ
って従来の１次ミキサーで全量混合造粒したものに比べ
て大巾に造粒性、通気性、生産性が改善できる。(Effects of the Invention) As detailed above, for example, when a part of the sinter feed is replaced with pellet feed and a low-cost sintered raw material mixed with pellet feed is subjected to moisture control granulation, the coke powder is added immediately before the secondary mixer. Alternatively, by adding it in the mixer, granulation performance, air permeability, and productivity can be greatly improved compared to when the entire amount is mixed and granulated using a conventional primary mixer.
特にペレットフィード配合率２０％以下では従来法通常
原料の生産性よシも向上した生産性を得ることができる
と共に、ペレットフィード配合率２０％でも従来法通常
原料並みの生産性全維持できる。In particular, when the pellet feed blending ratio is 20% or less, it is possible to obtain productivity that is even higher than that of the conventional raw material, and even with the pellet feed blending ratio of 20%, the productivity can be maintained at the same level as the conventional raw material.
第１図は本発明法による焼結原料の流れ図、第２図、第
３図、第４図はそれぞれ本発明法による調湿、混合、造
粒に於けるペレットフィード配合率と擬似粒度、通気度
、生産率の関係を表わす図、
第５図は従来の焼結原料流れ図、
第６図、第７図、第８図はそれぞれ従来の調湿、混合、
造粒に於けるペレットフィード配合率と擬似粒度、通気
度、生産率の関係を表わす図である。
１・・・鉄鉱石（シンターフィード）ホッパー、２・・
・＆［石（ペレットフィード）ホッパー、３・・・ノ々
インダーホッパー、４・・・副原料ホッパー、５・・・
返鉱ホッパー、６・・・粉コークスホツノ々−１７・・
・１次ミキサー、８・・・２次ミキサー。
代理人 弁理士 秋 沢 政 九
個２名
９壇ｍｌ
谷
羅紙蟹蒙ｉ
「
疑４釦歓ｉ
と
自発手続補正書
昭和６０年２ハ１８日
１、事件の表示
特願昭６０−１３３０号
２、発明の名称
焼結原料の事前処理方法
３、補正をする者
事件との関係 出 願 人
住 所 東京都千代田区大手町２丁目６番３号名
称 （８６５）新日本製鐵株式会社４、代理人
居 所 東京都中央区日本橋兜町１２番１号汁８
図
べ′しットフィード配合率２Figure 1 is a flowchart of the sintered raw material according to the method of the present invention, and Figures 2, 3, and 4 are the pellet feed blending ratio, pseudo particle size, and aeration during humidity conditioning, mixing, and granulation according to the method of the present invention, respectively. Figure 5 is a conventional sintering raw material flow diagram; Figures 6, 7, and 8 are conventional humidity control, mixing, and production rates, respectively.
It is a figure showing the relationship between the pellet feed blending ratio, pseudo particle size, air permeability, and production rate in granulation. 1... Iron ore (sinter feed) hopper, 2...
・&[Stone (pellet feed) hopper, 3... Nono inder hopper, 4... Sub-material hopper, 5...
Return hopper, 6... Powdered coke hots - 17...
・Primary mixer, 8...Second mixer. Agent Patent Attorney Masa Akizawa 9 Pieces 2 People 9ml Tanara Paper Kanimeni "Suspicion 4 Button Kani and Voluntary Proceedings Amendment 1st February 18th, 1985, Special Request for Indication of Case No. 1330, 1986" 2. Name of the invention Pre-processing method for sintered raw materials 3. Relationship with the case of the person making the amendment Applicant Address 2-6-3 Otemachi, Chiyoda-ku, Tokyo Name (865) Nippon Steel Corporation 4. Agent Address: 12-1 Juji, Nihonbashi Kabuto-cho, Chuo-ku, Tokyo
Fig. Bet feed mixture ratio 2
Claims (1)
た焼結原料を１次ミキサーで調湿造粒し、次いでこの調
湿造粒物に粉コークスを添加して２次ミキサーで転動造
粒することを特徴とする焼結原料の事前処理方法。(1) A sintered raw material containing pellet feed without coke powder is granulated using a primary mixer, and then coke powder is added to the humidity granulated material, and granulated by rolling using a secondary mixer. A method for pre-processing sintering raw materials, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP133085A JPS61163220A (en) | 1985-01-08 | 1985-01-08 | Pretreatment of raw material to be sintered |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP133085A JPS61163220A (en) | 1985-01-08 | 1985-01-08 | Pretreatment of raw material to be sintered |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61163220A true JPS61163220A (en) | 1986-07-23 |
Family
ID=11498483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP133085A Pending JPS61163220A (en) | 1985-01-08 | 1985-01-08 | Pretreatment of raw material to be sintered |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61163220A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6414722U (en) * | 1987-07-20 | 1989-01-25 | ||
| WO2009066796A1 (en) * | 2007-11-22 | 2009-05-28 | Jfe Steel Corporation | Method for production of raw material for use in the production of sintered ore |
| US9772179B2 (en) | 2014-07-09 | 2017-09-26 | Frost Tech Llc | Chain wear monitoring device |
| US10145770B2 (en) | 2015-07-29 | 2018-12-04 | Frost Tech Llc | Chain wear monitoring device |
-
1985
- 1985-01-08 JP JP133085A patent/JPS61163220A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6414722U (en) * | 1987-07-20 | 1989-01-25 | ||
| WO2009066796A1 (en) * | 2007-11-22 | 2009-05-28 | Jfe Steel Corporation | Method for production of raw material for use in the production of sintered ore |
| JP2009144240A (en) * | 2007-11-22 | 2009-07-02 | Jfe Steel Corp | Method of manufacturing molding material for producing sintered ore |
| US9772179B2 (en) | 2014-07-09 | 2017-09-26 | Frost Tech Llc | Chain wear monitoring device |
| US10145770B2 (en) | 2015-07-29 | 2018-12-04 | Frost Tech Llc | Chain wear monitoring device |
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