JPH0331429A - Production of granular raw material for sintered ore - Google Patents
Production of granular raw material for sintered oreInfo
- Publication number
- JPH0331429A JPH0331429A JP16491489A JP16491489A JPH0331429A JP H0331429 A JPH0331429 A JP H0331429A JP 16491489 A JP16491489 A JP 16491489A JP 16491489 A JP16491489 A JP 16491489A JP H0331429 A JPH0331429 A JP H0331429A
- Authority
- JP
- Japan
- Prior art keywords
- raw materials
- raw material
- sintered ore
- quicklime
- exhaust gas
- 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
- 239000002994 raw material Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000292 calcium oxide Substances 0.000 claims abstract description 21
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 21
- 238000005245 sintering Methods 0.000 claims abstract description 10
- 235000019738 Limestone Nutrition 0.000 claims abstract description 6
- 239000006028 limestone Substances 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 17
- 239000012256 powdered iron Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000000571 coke Substances 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000008188 pellet Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005453 pelletization Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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〕
この発明は、焼結鉱用粒状原料の製造方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing a granular raw material for sintered ore.
焼結鉱は、粉鉄鉱石、粉コークス、粉石灰石。 Sintered ore is powdered iron ore, powdered coke, and powdered limestone.
返鉱等の原料を、連続的に移動するパレット内に装入し
、点火炉によって点火した上、パレット内において焼成
することにより製造される。It is manufactured by charging raw materials such as return ore into a continuously moving pallet, igniting it in an ignition furnace, and then firing it inside the pallet.
このような焼結鉱を効率よく製造するためには、パレッ
ト内に装入された原料の通気性を良好にすることが必要
である。このために、予め原料をミキサーによって所定
粒度に造粒し、得られた粒状原料をパレット内に供給し
ている。In order to efficiently produce such sintered ore, it is necessary to improve the air permeability of the raw materials charged into the pallet. For this purpose, the raw material is granulated in advance to a predetermined particle size using a mixer, and the resulting granular raw material is supplied into a pallet.
上述したミキサー内における原料の造粒は、原料の粉鉄
鉱石、粉コークス、粉石灰石および生石灰を所定割合で
配合し、これらに所定量の水を添加しそして混合して、
所定粒度の造粒物に成形することにより行なわれている
。Granulation of the raw materials in the mixer described above involves blending the raw materials powdered iron ore, powdered coke, powdered limestone, and quicklime in a predetermined ratio, adding a predetermined amount of water to these, and mixing.
This is done by forming granules with a predetermined particle size.
上記原料中の生石灰は、結合剤として添加するものであ
り、添加された生石灰は、下記式に示すように、水分と
反応して消石灰となり、次いで、パレット内において排
ガス中のＣｏｔ と反応してセメント化し、原料を固化
する。The quicklime in the above raw materials is added as a binder, and the added quicklime reacts with moisture to become slaked lime, as shown in the formula below, and then reacts with Cot in the exhaust gas in the pallet. Cement and solidify raw materials.
ＣａＯ＋ １重０→Ｃａ（ＯＨ） ｔ
Ｃａ（ＯＲ）ｍ＋ｃＯｍ−ＣａＣＯｓ ＋ＬＯ（発明が
解決しようとする課題〕
上述した生石灰を含有する粒状原料を使用することによ
り、焼結鉱の生産率は向上するが、生石灰が高価なため
、焼結鉱の製造コストが高（なる。CaO+ 1 weight 0→Ca(OH) t Ca(OR)m+cOm-CaCOs +LO (Problem to be solved by the invention) By using the granular raw material containing quicklime mentioned above, the production rate of sintered ore is improved. However, because quicklime is expensive, the production cost of sintered ore is high.
従って、従来から生石灰の使用原単位を框滅するための
研究が一種々行なわれているが、適確な解決手段はな（
、特に、冬期に気温が低下すると、生石灰の原単位が上
昇する問題があった。Therefore, various studies have been conducted to reduce the unit consumption of quicklime, but there is no appropriate solution.
In particular, when the temperature drops in winter, there is a problem in that the unit consumption of quicklime increases.
従って、この発明の目的は、生石灰の使用原単位を低減
しこれによって焼結鉱の製造コストを下げることができ
る焼結鉱用粒状原料の製造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 producing a granular raw material for sintered ore, which can reduce the unit consumption of quicklime and thereby reduce the production cost of sintered ore.
〔課題を解決するための手段〕
本発明者等は、上述した問題を解決し、焼結鉱用粒状原
料中の生石灰の使用原単位を低減する方策について、種
々研究を行なった。その結果、次のことがわかった。[Means for Solving the Problems] The present inventors have conducted various studies on measures to solve the above-mentioned problems and reduce the consumption unit of quicklime in granular raw materials for sintered ore. As a result, we found the following.
即ち、ミキサーにおいて、粉鉄鉱石、粉コークス、粉石
灰石および生石灰からなる粒状原料を調製するに際し、
上記原料の温度と、造粒された粒状原料の粒度との間に
は、第３図に示すような関係がある。即ち、原料の温度
が高くなると造粒された粒状原料の粒度が大になる。そ
して、粒状原料の粒度と製品焼結鉱の生産率との間には
、第４図に示す関係がある。即ち、粒状原料の粒度が大
になると製品焼結鉱の生産率は向上する。That is, when preparing granular raw materials consisting of powdered iron ore, powdered coke, powdered limestone, and quicklime in a mixer,
There is a relationship as shown in FIG. 3 between the temperature of the raw material and the particle size of the granulated raw material. That is, as the temperature of the raw material increases, the particle size of the granulated raw material increases. There is a relationship shown in FIG. 4 between the particle size of the granular raw material and the production rate of the product sintered ore. That is, as the particle size of the granular raw material increases, the production rate of the product sintered ore increases.
生石灰の使用原単位（ｙ）と原料の温度（Ｔ）との間に
は、下記第（１）式に示すような反比例の関係にある。There is an inversely proportional relationship between the usage unit (y) of quicklime and the temperature (T) of the raw material as shown in the following equation (1).
ｙ ＝ Ａ ＸＰ、 −Ｂ Ｘ Ｔ ＋ Ｃ−（１）但
し、Ｐ、：製品焼結鉱の生産率
Ａ、Ｂ、Ｃ：定数
従って、原料の温度が低下すると、生石灰の使用原単位
は高くなる。各原料は、ヤードから配合槽に送られ、次
いで、配合槽からミキサーに送られ、ミキサーで混合、
造粒される。この間の原料の温度は、外気の温度に左右
されコントロールすることができない、この結果、前述
したように、冬期に気温が低下すると、生石灰の原単位
が上昇する。y = A XP, -B Become. Each raw material is sent from the yard to a blending tank, then sent from the blending tank to a mixer, mixed in the mixer,
Granulated. The temperature of the raw material during this period is influenced by the temperature of the outside air and cannot be controlled.As a result, as mentioned above, when the temperature drops in winter, the basic unit of quicklime increases.
この発明は、上記知見に基づいてなされたものであって
、配合槽内に収容されている、焼結鉱用原料としての粉
鉄鉱石、粉コークス、粉石灰石および生石灰を、前記配
合槽からミキサーに送り、前記ミキサー内において所定
量の水と共に混合しそして造粒することからなる焼結鉱
用粒状原料の製造方法において、
前記配合槽を、外壁と内壁とからなる二重構造となし、
前記外壁と前記内壁との間の空隙内に、高温度の焼結ク
ーラ−排ガスを導き、前記焼結クーラ−排ガスによって
前記配合槽内の前記原料を予熱し、このようにして予熱
された原料を前記ミキサーにおいて造粒することに特徴
を有するものである。This invention has been made based on the above knowledge, and the present invention is based on the above-mentioned knowledge, and the present invention has been made in such a way that iron ore powder, coke powder, limestone powder, and quicklime, which are contained in a blending tank and are used as raw materials for sinter, are transferred from the blending tank to a mixer. In the method for producing a granular raw material for sintered ore, the mixing tank has a double structure consisting of an outer wall and an inner wall;
A high-temperature sintering cooler exhaust gas is introduced into the gap between the outer wall and the inner wall, and the raw material in the blending tank is preheated by the sintering cooler exhaust gas, and the raw material preheated in this way is The present invention is characterized in that it is granulated in the mixer.
次に、この発明を図面を参照しなか・ら説明する。Next, the present invention will be explained with reference to the drawings.
第１図に系統図で示すように、配合槽７ａ、７ｂ。As shown in the system diagram in FIG. 1, blending tanks 7a and 7b.
７ｃ、７ｄ内に収容されている原料は、ミキサー８に送
られ、ミキサー８において所定量の水と共に混合しそし
て造粒されて粒状原料となる。ミキサー８において調製
された粒状原料は、サージホッパ３に送られ、サージホ
ッパ３内の粒状原料は、ロールフィーダ４によって切り
出され、シュート５を経て、連続的に移動するパレット
ｌ内に供給される。パレットｌ内゛の粒状原料は、点火
炉６において点火され、風箱２により下方に向って吸引
される燃焼排ガスにより焼成されて焼結鉱となる。The raw materials contained in 7c and 7d are sent to a mixer 8, where they are mixed with a predetermined amount of water and granulated into granular raw materials. The granular raw material prepared in the mixer 8 is sent to the surge hopper 3, and the granular raw material in the surge hopper 3 is cut out by a roll feeder 4, passed through a chute 5, and fed into a continuously moving pallet l. The granular raw material in the pallet 1 is ignited in the ignition furnace 6 and burned by the combustion exhaust gas sucked downward by the wind box 2 to become sintered ore.
この発明においては、第２図に拡大断面図で示すように
、配合槽７が、所定空隙ｌｌをあけた外壁９と内壁１０
とによって構成された二重構造になっている。外壁９と
内壁１０との間の空隙１１内には、約１５０℃の温度の
焼結クーラ−排ガスが循環するようになっている。In this invention, as shown in an enlarged cross-sectional view in FIG.
It has a dual structure consisting of. In the gap 11 between the outer wall 9 and the inner wall 10, sintering cooler exhaust gas having a temperature of about 150° C. is circulated.
配合槽７ａ、７ｂ、７ｃ、？ｄ内に収容されている原料
は、上述した焼結クーラ−排ガスにょうて予熱される０
通常、原料が配合槽内に滞留している時間は、約７〜８
時間であるから、この間に上述した焼結クーラ−排ガス
によって、前記原料の温度は約１０℃上昇する。Mixing tanks 7a, 7b, 7c, ? The raw materials stored in the chamber d are preheated by the sintering cooler exhaust gas mentioned above.
Normally, the time that raw materials stay in the blending tank is about 7 to 8
During this time, the temperature of the raw material increases by about 10°C due to the sintering cooler exhaust gas.
このようにして予熱された原料をミキサー８において造
粒することにより、生石灰の配合量を約１、５ ｋｇ
／Ｔ−５ｒ節減することができる。By granulating the raw materials preheated in this way in the mixer 8, the amount of quicklime blended is approximately 1.5 kg.
/T-5r can be saved.
以上述べたように、この発明の方法によれば、焼結鉱用
粒状原料の製造に当り、生石灰の使用原単位は低減され
、これによって焼結鉱の製造コストを低減することがで
きる工業上有用な効果がもたらされる。As described above, according to the method of the present invention, the unit consumption of quicklime is reduced in the production of granular raw material for sintered ore, which is an industrial advantage that can reduce the production cost of sintered ore. Useful effects are produced.
ｌ・・・パレット、 ３・・・ホッパ、 ５・・・シュート ７・・・配合槽、 ９・・・外壁、 １１・・・空隙。l...palette, 3...Hopper, 5...Shoot 7...Blending tank, 9...Outer wall, 11...Void.
Claims (1)
鉱石、粉コークス、粉石灰石および生石灰を、前記配合
槽からミキサーに送り、前記ミキサー内において所定量
の水と共に混合しそして造粒することからなる焼結鉱用
粒状原料の製造方法において、 前記配合槽を、外壁と内壁とからなる二重構造となし、
前記外壁と前記内壁との間の空隙内に、高温度の焼結ク
ーラ−排ガスを導き、前記焼結クーラ−排ガスによって
前記配合槽内の前記原料を予熱し、このようにして予熱
された原料を前記ミキサーにおいて造粒することを特徴
とする、焼結鉱用粒状原料の製造方法。[Claims] Powdered iron ore, coke powder, powdered limestone, and quicklime as raw materials for sintered ore, which are stored in a blending tank, are sent from the blending tank to a mixer, and a predetermined amount of In a method for producing a granular raw material for sintered ore, which comprises mixing with water and granulating it, the blending tank has a double structure consisting of an outer wall and an inner wall,
A high-temperature sintering cooler exhaust gas is introduced into the gap between the outer wall and the inner wall, and the raw material in the blending tank is preheated by the sintering cooler exhaust gas, and the raw material preheated in this way is A method for producing a granular raw material for sintered ore, characterized in that the granular raw material is granulated in the mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16491489A JPH0331429A (en) | 1989-06-27 | 1989-06-27 | Production of granular raw material for sintered ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16491489A JPH0331429A (en) | 1989-06-27 | 1989-06-27 | Production of granular raw material for sintered ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0331429A true JPH0331429A (en) | 1991-02-12 |
Family
ID=15802258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16491489A Pending JPH0331429A (en) | 1989-06-27 | 1989-06-27 | Production of granular raw material for sintered ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0331429A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6475593B1 (en) | 2000-02-03 | 2002-11-05 | Eidai Kako Co., Ltd. | Floor mat |
| JP2006068225A (en) * | 2004-09-01 | 2006-03-16 | Orix Interior Corp | Mat |
-
1989
- 1989-06-27 JP JP16491489A patent/JPH0331429A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6475593B1 (en) | 2000-02-03 | 2002-11-05 | Eidai Kako Co., Ltd. | Floor mat |
| JP2006068225A (en) * | 2004-09-01 | 2006-03-16 | Orix Interior Corp | Mat |
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