JPS63247315A - Production of sintered ore - Google Patents
Production of sintered oreInfo
- Publication number
- JPS63247315A JPS63247315A JP62081261A JP8126187A JPS63247315A JP S63247315 A JPS63247315 A JP S63247315A JP 62081261 A JP62081261 A JP 62081261A JP 8126187 A JP8126187 A JP 8126187A JP S63247315 A JPS63247315 A JP S63247315A
- Authority
- JP
- Japan
- Prior art keywords
- sintering
- raw material
- sintered
- upper layer
- ore
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000005245 sintering Methods 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 235000019738 Limestone Nutrition 0.000 claims abstract description 20
- 239000006028 limestone Substances 0.000 claims abstract description 20
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 20
- 239000000292 calcium oxide Substances 0.000 claims description 10
- 235000012255 calcium oxide Nutrition 0.000 claims description 10
- 238000001816 cooling Methods 0.000 abstract description 15
- 238000002156 mixing Methods 0.000 abstract description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 3
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 3
- 239000004571 lime Substances 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 239000003979 granulating agent Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 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
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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〕
本発明は焼結鉱の製造方法に関し、さらに詳しくは焼結
原料に用いる生石灰の焼成を併用すると共に、焼結鉱の
顕然回収の効率化を図る技術に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for producing sintered ore, and more specifically, to a method for producing sintered ore, and more specifically to a method for producing sintered ore, and more specifically, a method for producing sintered ore in combination with the calcination of quicklime used as a raw material for sintering, as well as the efficiency of apparent recovery of sintered ore. Concerning technology for achieving
連続式焼結機は、第３図に示すように、焼結機ｌのパレ
ット上に床敷鉱ホッパ２から床敷鉱を供給し、原鉱ホッ
パ３から焼結原料を供給し、この焼結原料層上面に点火
炉４で着火し、焼結ｆｉｔの終端部で焼結が完了するよ
うに操業される。As shown in Fig. 3, the continuous sintering machine supplies bedding ore from a bedding ore hopper 2 onto the pallet of the sintering machine l, supplies sintering raw materials from an ore hopper 3, and processes the sintering process. The ignition furnace 4 ignites the upper surface of the sintering material layer and is operated so that sintering is completed at the end of the sintering fit.
このとき焼結原料には、通気性を確保するため造粒剤と
して生石灰または消石灰が加えられているが、これら造
粒剤は、別途製造あるいは購入されるため、焼結コスト
上昇の１原因となっている。At this time, quicklime or slaked lime is added to the sintering raw material as a granulating agent to ensure air permeability, but since these granulating agents are manufactured or purchased separately, they are one of the causes of increased sintering costs. It has become.
一方、焼結が完了した焼結鉱は図示しない１次クラッシ
ャーを経て、冷却機に供給されるが、この焼結鉱は第４
図に示すが如く、温度分布を有しており、焼結層の上半
部は常温付近まで冷却されてい、る、しかしながら従来
の技術では、この低温で粉率の高い焼結鉱も冷却機に供
給するため、その冷却効率が低い。On the other hand, the sintered ore that has been sintered passes through a primary crusher (not shown) and is supplied to the cooler.
As shown in the figure, it has a temperature distribution, and the upper half of the sintered layer is cooled to around room temperature. However, with conventional technology, sintered ore with a high powder content at this low temperature is also cooling efficiency is low.
また、従来の技術としては特開昭５８−１３３３３０の
ように床敷鉱のかわりに石灰石を用い。Furthermore, as a conventional technique, limestone is used instead of bedding ore, as in JP-A-58-133330.
これを生石灰化して、回収するものがあるが、この場合
には石灰石粒度が大きいこともあり、そのまま成品系統
に混入してしまい、回収率が低かった。This can be recovered by turning it into quicklime, but in this case, the limestone particles are large, so it is mixed into the product system as it is, resulting in a low recovery rate.
従来の技術では焼結機上で焼成した生石灰を効率良く回
収することは困難であった。また焼結鉱はパレット上層
部の低温で強度が低く粉率の高い部分が高温のパレット
下層部の焼結鉱と共に冷却機に供給されるため、冷却機
における冷却効率が低い。With conventional techniques, it has been difficult to efficiently recover quicklime fired on a sintering machine. In addition, the sintered ore has a low temperature, low strength and high powder content in the upper part of the pallet, and is supplied to the cooler together with the higher temperature sintered ore in the lower part of the pallet, so the cooling efficiency in the cooler is low.
本発明は連続式焼結機において、焼結原料を供給した後
、原料表面に着火させる前の段階で、焼結層上層部すな
わちパレット上の焼結鉱の上面からほぼ１５０ｍｍまで
の部分に粒径５ｍｍ〜１５ｍｍの石灰石を添加し、この
後、焼結層の上表面に着火し、焼結原料と共に石灰石を
焼成して生石灰化させた後、この焼結層上層部を、焼結
機上に配置した除去装置により連続的に取り出し、取り
出した上層部を返し鉱生石灰として焼結原料にリサイク
ルすることを特徴とする焼結鉱製造方法である。In a continuous sintering machine, the present invention is characterized in that after the sintering raw material is supplied and before the surface of the raw material is ignited, grains are distributed in the upper layer of the sintering layer, that is, approximately 150 mm from the top surface of the sintered ore on the pallet. Limestone with a diameter of 5 mm to 15 mm is added, and then the upper surface of the sintered layer is ignited, and the limestone is burned together with the sintering raw material to turn it into quicklime. This method of producing sintered ore is characterized in that it is continuously taken out by a removing device placed in the sintered ore, and the taken out upper layer is returned and recycled as quicklime as raw material for sintering.
通常の操業の場合、焼結機のパレット進行方向後流側の
部分の焼結層上層部すなわち上面からほぼ１５０ｍｍま
では、落下強度が低く、１次クラッシャー以後での粉率
が高い。このパレット上焼結層上層側の表面から１５０
ｍｍまでの部分に粒度５ｍｍ〜１５ｍｍの石灰石を添加
し、焼成し、次いでこの上層部が常温付近まで冷却され
、１次クラッシャーに供給される前にこの上層部を除去
することによって、生石灰化した石灰石は、この上層部
と共にほぼ全量を回収することができる。さらにこのパ
レット上の原料層上層部を除去することによって冷却機
での処理量が少なくなり、冷却機での処理鉱石の粉率が
低下し、冷却機に送られる焼結鉱の平均温度が上昇する
ため、冷却機の冷却効率が向上し、排熱回収量の増加も
可能となる。In the case of normal operation, the upper layer of the sintered layer on the downstream side in the pallet traveling direction of the sintering machine, that is, up to approximately 150 mm from the top surface, has low falling strength and a high powder ratio after the primary crusher. 150 mm from the upper surface of the sintered layer on this pallet
Limestone with a particle size of 5 mm to 15 mm was added to the part up to 1.5 mm in diameter, calcined, and then the upper layer was cooled to around room temperature, and the upper layer was removed before being fed to the primary crusher to quickly lime the limestone. Almost all of the limestone can be recovered together with the upper layer. Furthermore, by removing the upper layer of the raw material layer on the pallet, the amount of ore processed in the cooler is reduced, the powder ratio of ore processed in the cooler is reduced, and the average temperature of the sintered ore sent to the cooler is increased. Therefore, the cooling efficiency of the cooler improves, and it becomes possible to increase the amount of exhaust heat recovery.
焼結機パレット上のパレット進行方向後流側の部分の焼
結層上層部は、落下強度が低く、下流工程で処理物の粉
率増加の原因となっている。この上層部は、強度が低く
、かつ常温付近まで冷却されているため、焼結機上での
除去は容易である。The upper part of the sintered layer on the sintering machine pallet on the downstream side in the pallet traveling direction has low fall strength, which causes an increase in the powder ratio of the processed material in the downstream process. This upper layer has low strength and is cooled to around room temperature, so it is easy to remove on the sintering machine.
本発明の実施例の一例を第１図、第２図、第４図を用い
て説明する。An example of an embodiment of the present invention will be described with reference to FIGS. 1, 2, and 4.
第１図に示すように、焼結機ｌのパレット上に床敷鉱ホ
ッパ２から床敷鉱を供給し、原料ホッパ３から原料を供
給し、この原料上表面に石灰石ホッパ１２から石灰石を
供給する。さらにこの石灰石の焼成効率を高めるため、
この石灰石を原料焼結層上層部と共に混合装置１３で混
合する。この混合後の原料上面に点火炉４で着火し、大
気を原料層上面から下面へと吸引し、焼結を行う、この
焼結機１のパレット進行方向後流側の部分では原料層上
層部は、焼結が完了しており、石灰石の生石灰化も完了
している。また、この部分の原料層上層部は強度、温度
共低いため、除去装置６によって容易に除去することが
できる。As shown in Fig. 1, bedding ore is supplied from the bedding ore hopper 2 onto the pallet of the sintering machine l, raw material is supplied from the raw material hopper 3, and limestone is supplied from the limestone hopper 12 onto the upper surface of the raw material. do. Furthermore, in order to increase the firing efficiency of this limestone,
This limestone is mixed with the upper layer of the raw material sintered layer in a mixing device 13. After this mixing, the upper surface of the raw materials is ignited in the ignition furnace 4, and the atmosphere is sucked from the upper surface of the raw material layer to the lower surface to perform sintering. Sintering has been completed and quicklimeization of limestone has also been completed. Further, since the strength and temperature of the upper layer of the raw material layer in this part are low, it can be easily removed by the removing device 6.
この除去された上層部は除去装置６の後に配置されたベ
ルトコンベヤ７で系外へ取り出され、返鉱としてリサイ
クルされ、焼結原料の造粒性を向上せしめる。The removed upper layer is taken out of the system by a belt conveyor 7 placed after the removal device 6 and recycled as return ore, improving the granulation properties of the sintering raw material.
次にこの除去装置６は、第２図に示すが如く、排土板９
で焼結層５の上層部、すなわち焼結層の表面から深さ約
１５０ｍｍまでの部分を掘削集鉱する。掘削集鉱された
焼結鉱は、レーキチェーンコンベヤ８によって排土板９
に沿って掻き上げられ、後続のベルトコンベヤ７へ投入
される。ただし、焼結層上層部の強度の低い部分だけを
除去するため、排土板９には図示せぬ掘削抵抗検出装置
が設けられ、その信号によって動作するシリンダ１０に
よって支持部１１を支点として傾斜を変更し、これによ
り掘削量が適宜制御され、焼結鉱歩止の低下を防止して
いる。Next, this removing device 6 moves to a soil removal plate 9 as shown in FIG.
Then, the upper part of the sintered layer 5, that is, the part from the surface of the sintered layer to a depth of about 150 mm, is excavated and collected. The excavated and concentrated sintered ore is transferred to a discharging plate 9 by a rake chain conveyor 8.
It is scraped up along the belt conveyor 7 that follows. However, in order to remove only the low-strength portion of the upper part of the sintered layer, the earth removal plate 9 is provided with an excavation resistance detection device (not shown), and the cylinder 10 operated by the signal is used to tilt the soil removal plate 9 around the support portion 11 as a fulcrum. This allows the amount of excavation to be appropriately controlled and prevents a decline in the yield of sintered ore.
以上の結果、造粒剤としての生石灰を安価に製造提供す
ることが回部となる。加えて、冷却機へ焼結鉱を供給す
る以前に、温度が低くかつ強度が低く粉化し易い焼結層
上層部を取り除くことによって、冷却機の処理量の低下
、通気性の改善によって冷却効率を高めることができる
。また冷却機へ供給する焼結鉱の平均温度が上昇するこ
とによって排熱回収効率が高まり、排熱回収量の増加が
可能となる。As a result of the above, it is now possible to manufacture and provide quicklime as a granulating agent at low cost. In addition, by removing the upper part of the sintered layer, which has low temperature, low strength, and is easily powdered, before supplying the sintered ore to the cooler, the throughput of the cooler can be reduced and cooling efficiency can be improved by improving air permeability. can be increased. Furthermore, by increasing the average temperature of the sintered ore supplied to the cooler, the efficiency of exhaust heat recovery increases, making it possible to increase the amount of exhaust heat recovery.
本発明は以上のように構成されているので次の優れた効
果を奏する。Since the present invention is configured as described above, it exhibits the following excellent effects.
（１）焼結機を用いて、造粒剤としての生石灰を安価に
製造、提供することができる。(1) Using a sintering machine, quicklime as a granulating agent can be produced and provided at low cost.
■ パレット上の焼結層上層部の粉化し易く、冷却の必
要のない部分を破砕および冷却の前段階で除去するため
、冷却装置での処理量が減少し、冷却装置での通気抵抗
が改善され、冷却効率の増加、冷却ファンの省電力を図
ることができる。■ The upper part of the sintered layer on the pallet, which is easily pulverized and does not require cooling, is removed before crushing and cooling, reducing the throughput in the cooling device and improving ventilation resistance in the cooling device. This increases cooling efficiency and saves power for the cooling fan.
■ 冷却装置へ提供する焼結鉱は、低温部の割合が減少
するため、平均温度が上昇し、排熱回収設備を有する冷
却装置では熱回収効率が上昇し、回収熱量が増加する。■ The average temperature of the sintered ore provided to the cooling equipment decreases as the proportion of the low-temperature portion decreases, and in cooling equipment equipped with exhaust heat recovery equipment, the heat recovery efficiency increases and the amount of recovered heat increases.
第１図は本発明方法の実施に用いる焼結機の模式的側面
図、第２図は本発明方法に用いる焼結鉱除去袋この一例
の模式的側面図、第３図は従来の焼結機の模式側面図、
第４図は焼結機から排出される直前のパレット上焼結鉱
の厚さ方向の温度分布曲線図である。
１・・・焼結４！ｌ ２・・・床敷鉱ホッパ３
・・・原鉱ホッパ ４・・・点火炉５・・・焼結層
６・・・除去装置７・・・ベルトコンベヤ
８・・・レーキチェーンコンベヤ
９・・・排土板 １０・・・シリンダ１１・・
・支持袋２２ １２・・・石灰石ホッパ１３・・・
混合装置Fig. 1 is a schematic side view of a sintering machine used in carrying out the method of the present invention, Fig. 2 is a schematic side view of an example of a sinter removal bag used in the method of the present invention, and Fig. 3 is a schematic side view of a sintering machine used in the method of the present invention. Schematic side view of the machine,
FIG. 4 is a temperature distribution curve diagram in the thickness direction of the sintered ore on the pallet immediately before being discharged from the sintering machine. 1...Sintering 4! l 2...bed ore hopper 3
... Raw ore hopper 4 ... Ignition furnace 5 ... Sintered layer 6 ... Removal device 7 ... Belt conveyor 8 ... Rake chain conveyor 9 ... Earth removal plate 10 ... Cylinder 11...
・Support bag 22 12... limestone hopper 13...
mixing device
Claims (1)
給した後、原料表面に着火させる前の段階で、パレット
上焼結層上層側に粒度５ｍｍ〜１５ｍｍの石灰石を添加
し、この後、焼結層上表面に着火し、焼結原料と共に石
灰石を焼成して生石灰化させ、該上層部を焼結機上に配
置した除去装置により連続的に取り出し、取り出した該
焼結層上層部を返し鉱に戻し、生石灰原料として焼結原
料にリサイクルすることを特徴とする焼結鉱製造方法。1 Using a continuous sintering machine, after supplying the sintered raw material onto the pallet, before igniting the surface of the raw material, limestone with a grain size of 5 mm to 15 mm is added to the upper layer of the sintered layer on the pallet. After that, the upper surface of the sintered layer is ignited, and the limestone is burned together with the sintering raw material to turn it into quicklime, and the upper layer is continuously removed by a removal device placed on the sintering machine, and the upper layer of the sintered layer is removed. A method for producing sintered ore, which is characterized in that part of the sintered ore is returned to returned ore and recycled as quicklime raw material to be used as a sintering raw material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8126187A JP2510193B2 (en) | 1987-04-03 | 1987-04-03 | Sinter production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8126187A JP2510193B2 (en) | 1987-04-03 | 1987-04-03 | Sinter production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63247315A true JPS63247315A (en) | 1988-10-14 |
| JP2510193B2 JP2510193B2 (en) | 1996-06-26 |
Family
ID=13741422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8126187A Expired - Fee Related JP2510193B2 (en) | 1987-04-03 | 1987-04-03 | Sinter production method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2510193B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480329A (en) * | 1990-07-24 | 1992-03-13 | Kawasaki Steel Corp | Production of sintered ore |
| US6606202B2 (en) | 2000-09-26 | 2003-08-12 | Canon Kabushiki Kaisha | Zoom lens system and optical apparatus using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58133331A (en) * | 1982-02-03 | 1983-08-09 | Nippon Kokan Kk <Nkk> | Preparation of sintered ore |
-
1987
- 1987-04-03 JP JP8126187A patent/JP2510193B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58133331A (en) * | 1982-02-03 | 1983-08-09 | Nippon Kokan Kk <Nkk> | Preparation of sintered ore |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480329A (en) * | 1990-07-24 | 1992-03-13 | Kawasaki Steel Corp | Production of sintered ore |
| US6606202B2 (en) | 2000-09-26 | 2003-08-12 | Canon Kabushiki Kaisha | Zoom lens system and optical apparatus using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2510193B2 (en) | 1996-06-26 |
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