JP5251057B2 - Raw material for low-grade iron scrap - Google Patents
Raw material for low-grade iron scrap Download PDFInfo
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- JP5251057B2 JP5251057B2 JP2007252819A JP2007252819A JP5251057B2 JP 5251057 B2 JP5251057 B2 JP 5251057B2 JP 2007252819 A JP2007252819 A JP 2007252819A JP 2007252819 A JP2007252819 A JP 2007252819A JP 5251057 B2 JP5251057 B2 JP 5251057B2
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- iron
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- iron scrap
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 114
- 229910052742 iron Inorganic materials 0.000 title claims description 57
- 239000002994 raw material Substances 0.000 title claims description 21
- 239000000463 material Substances 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229920003023 plastic Polymers 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 9
- 239000006148 magnetic separator Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000283715 Damaliscus lunatus Species 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
Landscapes
- Processing Of Solid Wastes (AREA)
- Combined Means For Separation Of Solids (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
本発明は、銅線などの非鉄分が混入した低品位の鉄スクラップ(低品位鉄スクラップ)から、銅線などの非鉄分を除去して、高級鋼材用の製鉄原料として再利用可能な高純度の鉄スクラップ(高純度鉄スクラップ)を得る方法に関するものである。 The present invention removes non-ferrous content such as copper wire from low-grade iron scrap (low-grade iron scrap) mixed with non-ferrous content such as copper wire, and has high purity that can be reused as a steelmaking raw material for high-grade steel materials. It is related with the method of obtaining the iron scrap (high purity iron scrap).
従来から、廃自動車や建築廃材に由来する鉄スクラップは、電炉製鉄法において、電炉での製鉄原料(鉄源)として利用されている。その際は、スクラップ工場で、廃自動車などを破砕し、磁力選別機で鉄主体のスクラップ(鉄スクラップ)を選別回収した後、貯蔵や搬送に都合のよいように、所定の形状にプレス成形されたり、裁断して結束されたりして、出荷されている。電炉工場では、入荷した鉄スクラップを解して、電炉に投入し、鉄源として利用している(例えば、特許文献1参照)。 Conventionally, iron scrap derived from scrapped automobiles and building waste has been used as an iron making raw material (iron source) in an electric furnace in the electric furnace iron making process. In that case, after scrapping a scrap car at a scrap factory and sorting and recovering iron-based scrap (iron scrap) with a magnetic separator, it is pressed into a predetermined shape for convenient storage and transportation. Or are cut and bound and shipped. In the electric furnace factory, the received iron scrap is unwound, put into the electric furnace, and used as an iron source (see, for example, Patent Document 1).
なお、後述する[発明を実施するための最良の形態]において、下記の特許文献2を引用するので、ここに併せて記載しておく。
近年、鉄スクラップの利用拡大の観点から、高炉製鉄法においても、高炉溶銑に鉄スクラップを混合し、転炉やトピートなどの精錬設備に投入して、製鉄原料(鉄源)として活用するようになってきた。 In recent years, from the viewpoint of expanding the use of iron scrap, even in the blast furnace ironmaking process, iron scrap is mixed with blast furnace hot metal, and then used as a raw material for iron making (iron source) by introducing it into refining equipment such as converters and topies. It has become.
しかし、その際に、高級鋼材用の製鉄原料とするためには、従来は問題とならなかった鉄スクラップ中の銅線やプラスチック類などの非鉄混入物を十分に分離・除去して、高純度の鉄スクラップとする必要がでてきた。 However, at that time, in order to make steel production raw materials for high-grade steel materials, high purity is achieved by sufficiently separating and removing non-ferrous contaminants such as copper wires and plastics in iron scrap, which was not a problem in the past. It has become necessary to make iron scrap.
本発明は、上記のような事情に鑑みてなされたものであり、銅線やプラスチック類などの非鉄分が混入した低品位鉄スクラップから、銅線などの非鉄分を除去して、高級鋼材用の製鉄原料として再利用可能な高純度鉄スクラップを的確に得ることができる低品位鉄スクラップの原料化方法を提供することを目的とするものである。 The present invention has been made in view of the above circumstances, and removes non-ferrous components such as copper wires from low-grade iron scrap mixed with non-ferrous components such as copper wires and plastics, for high-grade steel materials. An object of the present invention is to provide a method for converting low-grade iron scrap into a raw material that can accurately obtain high-purity iron scrap that can be reused as an iron-making raw material.
上記課題を解決するために、本発明は以下の特徴を有する。 In order to solve the above problems, the present invention has the following features.
[1]銅線やプラスチック類が混入した鉄スクラップを破砕機によって破砕・分離し、その破砕混合物を揺動反発式選別機によって重量物と軽量物と小径物とに選別・回収し、重量物として選別・回収された破砕物を製鉄原料として利用することを特徴とする低品位鉄スクラップの原料化方法。 [1] Iron scrap mixed with copper wire and plastics is crushed and separated by a crusher, and the crushed mixture is sorted and recovered into heavy, light and small-diameter items by a rocking repulsive sorter. As a raw material for low-grade iron scrap, the crushed material collected and collected as a raw material is used as a raw material for iron making.
[2]重量物として選別・回収された破砕物を磁力選別機によって磁性物と非磁性物に選別し、磁性物として回収された破砕物を製鉄原料として利用することを特徴とする前記[1]に記載の低品位鉄スクラップの原料化方法。 [2] The above-mentioned [1], wherein the crushed material sorted and collected as a heavy material is sorted into a magnetic material and a non-magnetic material by a magnetic separator, and the crushed material collected as a magnetic material is used as a steelmaking raw material. ] The raw-material manufacturing method of the low grade iron scrap described in the above.
[3]前記破砕混合物から風力選別機によって軽量プラスチックを除去した後、揺動反発式選別機によって重量物と軽量物と小径物とに選別・回収することを特徴とする前記[1]または[2]に記載の低品位鉄スクラップの原料化方法。 [3] The above-mentioned [1] or [1], wherein after removing lightweight plastic from the crushed mixture by a wind sorter, sorting and collecting into heavy, lightweight and small-diameter items by a swinging repulsive sorter 2] The method for producing low-grade iron scrap as a raw material.
本発明においては、低品位鉄スクラップから、銅線などの非鉄分を除去して、高級鋼材用の製鉄原料として再利用可能な高純度鉄スクラップを的確に得ることができる。 In the present invention, non-ferrous components such as copper wires can be removed from low-grade iron scrap, and high-purity iron scrap that can be reused as an iron-making raw material for high-grade steel materials can be accurately obtained.
本発明の実施形態を図面に基づいて説明する。 Embodiments of the present invention will be described with reference to the drawings.
(第1の実施形態)
図1は、本発明の第1の実施形態を示す処理フロー図である。
(First embodiment)
FIG. 1 is a process flow diagram showing a first embodiment of the present invention.
図1に示すように、廃自動車や建築廃材に由来し、銅線やプラスチック類等の非鉄分が混入した低品位鉄スクラッップを、ハンマ型破砕機11によって、100〜150mm程度の大きさの塊(中塊)に破砕する。その際に、ハンマ型破砕機11では、複数のハンマが回転することにより、投入された低品位鉄スクラッップが破砕されるとともに、破砕物同士が摩滅して、鉄部分にハンダ付け接合していた銅線が外れる。これによって、鉄分と銅線とプラスチック類とが一体化していた鉄スクラップが、鉄分と銅線とプラスチック類とに破砕・分離される。 As shown in FIG. 1, a low-grade iron scrap that is derived from scrapped automobiles and building waste and mixed with non-ferrous components such as copper wires and plastics is lumped by a hammer type crusher 11 to a size of about 100 to 150 mm. Crush into (medium). At that time, in the hammer type crusher 11, the plurality of hammers rotated, so that the low-grade iron scraps that were input were crushed and the crushed materials were worn away and joined to the iron portion by soldering. The copper wire comes off. As a result, iron scrap in which iron, copper wire, and plastics are integrated is crushed and separated into iron, copper wire, and plastics.
この後、この破砕混合物(鉄分と銅線とプラスチック類とが混合)から鉄分を磁力選別することで、高純度スクラップ鉄を得ることができればよいが、破砕混合物では銅線が鉄分やプラスチック類に絡み付いており、そのままの状態では適切に磁力選別を行うことが難しい。 After that, it is sufficient if high purity scrap iron can be obtained by magnetically sorting iron from this crushing mixture (mixed of iron, copper wire, and plastics). However, in the crushing mixture, copper wire is converted into iron and plastics. It is entangled, and it is difficult to properly select the magnetic force as it is.
そこで、この実施形態においては、破砕混合物を揺動反発式選別機(揺動回転式選別機)13によって、重量物と軽量物と小径物とに選別・回収することで、鉄分やプラスチック類への銅線の絡み付きを無くしてから、磁力選別を行うようにしている。 Therefore, in this embodiment, the crushed mixture is sorted and collected into heavy, lightweight, and small-diameter items by a swinging repulsive sorter (oscillating rotary sorter) 13 to obtain iron and plastics. After eliminating the tangling of the copper wire, magnetic selection is performed.
ここで、揺動反発式選別機13は、前記特許文献2にも記載されているように、クランク軸の回転により搭載物を傾斜上方に送るような揺動運動(振幅は30mm以上)をする傾斜スクリーン上に被選別物を投入し、被選別物を構成する物体の重量、形状および硬度の差により傾斜スクリーン上で反発する弾道が異なることを利用して、被選別混合物を選別する形態選別装置であり、傾斜スクリーン上での跳ね返りが大きい重量物は傾斜スクリーンの傾斜下方に回収され、傾斜スクリーン上での跳ね返りが小さい軽量物は傾斜スクリーンの傾斜上方に回収され、傾斜スクリーンの篩目より小さい小径物は傾斜スクリーンの篩下に回収されるような構造になっている。
Here, as described in Patent Document 2, the swinging
したがって、このような揺動反発式選別機13に、鉄分と銅線とプラスチック類とが混合した破砕混合物を投入すると、傾斜スクリーンの傾斜上方の軽量物側に、軽量プラスチックと銅線が回収され、傾斜スクリーンの篩下に、脆性プラスチック等の小径物が回収され、傾斜スクリーンの傾斜下方の重量物側に、鉄分と一部の非鉄混入物が回収される。
Therefore, when a pulverized mixture in which iron, copper wire, and plastics are mixed is put into such a swinging
そして、揺動反発式選別機13で重量物側に回収された破砕物(鉄分と一部の非鉄混入物)を、磁力選別機14によって、磁性物(鉄分)と非磁性物(非鉄混入物)に選別する。
The crushed material (iron and some non-ferrous contaminants) collected on the heavy load side by the swinging
これにより、磁力選別機14で磁性物として選別された破砕物は、高純度な鉄スクラップとなっており、高級鋼材用の製鉄原料として再利用することができる。
Thereby, the crushed material selected as a magnetic material by the
なお、上記においては、ハンマ型破砕機11によって低品位鉄スクラッップを鉄分と銅線とプラスチック類とに破砕・分離しているが、低品位鉄スクラッップを鉄分と銅線とプラスチック類とに破砕・分離できるものであれば、他の破砕機(例えば、ギロチン式破砕機)を用いてもよい。 In the above, the hammer grade crusher 11 crushes and separates the low grade iron scrap into iron, copper wire and plastics, but crushes and separates the low grade iron scrap into iron, copper wire and plastics. Any other crusher (for example, a guillotine crusher) may be used as long as it can be separated.
(第2の実施形態)
図2は、本発明の第2の実施形態を示す処理フロー図である。
(Second Embodiment)
FIG. 2 is a process flow diagram showing the second embodiment of the present invention.
前述の第1の実施形態において、揺動反発式選別機13での選別の際に、発泡ウレタンは軽量であるけれども、ブロック状の形態の場合、重量物側に回収されてしまう。それにより、その後の磁力選別機14での選別の際に、銅線ほどではないが、発泡ウレタンが鉄分に絡み付いてしまうことがある。
In the first embodiment described above, the urethane foam is lightweight at the time of sorting by the swinging
そこで、この第2の実施形態においては、ハンマ型破砕機11による破砕混合物を風力選別機12に投入して、発泡ウレタンを除去してから、揺動反発式選別機13に投入するようにしている。
Therefore, in this second embodiment, the mixture crushed by the hammer type crusher 11 is put into the
これにより、磁力選別機14での選別の際に、発泡ウレタンが鉄分に絡み付くことがなくなるので、磁力選別機14で磁性物として選別された破砕物は、より一層高純度な鉄スクラップとなる。
As a result, the urethane foam does not get entangled with iron during sorting by the
なお、上記の第1の実施形態および第2の実施形態において、揺動反発式選別機13で重量物側に回収された破砕物の鉄純度が良好であれば、その後の磁力選別機14での選別を行わずに、そのまま製鉄原料として使用することもできる。
In the first embodiment and the second embodiment, if the iron purity of the crushed material collected on the heavy load side by the swinging
11 ハンマ型破砕機
12 風力選別機
13 揺動反発式選別機
14 磁力選別機
DESCRIPTION OF SYMBOLS 11
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JP5277698B2 (en) * | 2008-04-11 | 2013-08-28 | Jfeスチール株式会社 | Blast furnace iron making method using low grade iron scrap |
JP5489652B2 (en) * | 2009-10-30 | 2014-05-14 | Jfeスチール株式会社 | Scrap shredder equipment |
JP5370211B2 (en) * | 2010-02-22 | 2013-12-18 | Jfeスチール株式会社 | Raw material method and equipment for low-grade iron scrap |
CN102553881A (en) * | 2010-12-13 | 2012-07-11 | 湖南万容科技股份有限公司 | Fragmentation separation process flow for end-of-life automobile body |
JP6183329B2 (en) * | 2014-10-10 | 2017-08-23 | Jfeスチール株式会社 | Method for processing scrap and converter slag |
CN115382885B (en) * | 2022-09-28 | 2024-05-31 | 格林美(天津)城市矿产循环产业发展有限公司 | Broken sorting system of car |
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JPH08188836A (en) * | 1995-01-06 | 1996-07-23 | Nippon Steel Corp | Method and equipment for treating copper impurities in iron scrap |
JPH10225934A (en) * | 1997-02-17 | 1998-08-25 | Nkk Corp | Utilization of waste as resources |
JP3664586B2 (en) * | 1998-06-25 | 2005-06-29 | 同和鉱業株式会社 | Method and apparatus for metal recovery from solid waste |
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |