JPS62225889A - Preheater for aluminum scrap - Google Patents
Preheater for aluminum scrapInfo
- Publication number
- JPS62225889A JPS62225889A JP61069684A JP6968486A JPS62225889A JP S62225889 A JPS62225889 A JP S62225889A JP 61069684 A JP61069684 A JP 61069684A JP 6968486 A JP6968486 A JP 6968486A JP S62225889 A JPS62225889 A JP S62225889A
- Authority
- JP
- Japan
- Prior art keywords
- preheating device
- scrap
- aluminum scrap
- aluminum
- specific gravity
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 30
- 230000005484 gravity Effects 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 description 17
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 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)
- Furnace Details (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はアルミスクラップの予熱装置に関し、より具体
的にはアルミスクラップの移動体積量が回転数にほぼ比
例する傾斜型ロータリーキルンのような連続回転式予熱
装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an aluminum scrap preheating device, and more specifically to a continuous rotation kiln such as an inclined rotary kiln in which the moving volume of aluminum scrap is approximately proportional to the rotation speed. The present invention relates to a type preheating device.
［従来の技術］
アルミスクラップを溶解して再生地金を生産する工程に
おいては、省エネルギ一対策及び溶解炉の負担を軽減す
るため、或いはアルミスクラップに付着している油分等
の可燃物を燃焼除去するため、アルミスクラップの溶解
に先立ちこれらを予熱処理している。このための従来の
予熱装置にあっては、性状が一様のもの（例えばダライ
粉等）を処理対象として構成されているため、以下に詳
述するように、性状の異なるアルミスクラップを処理す
る場合は、経験則に従って運転速度を一々調整していた
。[Prior art] In the process of melting aluminum scrap to produce recycled metal, it is necessary to burn combustible materials such as oil attached to aluminum scrap in order to save energy and reduce the burden on the melting furnace. To remove these, aluminum scraps are preheated prior to melting. Conventional preheating equipment for this purpose is configured to process materials with uniform properties (for example, dust powder, etc.), so as described in detail below, it is necessary to process aluminum scraps with different properties. In this case, the driving speed was adjusted one by one according to empirical rules.
［発明が解決しようとする問題点］
しかし、近年再生利用の観点から原料のスクラップの性
状が多様化し、これに応じた予熱装置の運転管理が非常
に煩雑なものになって来た。原料スクラップは処理し易
いように破砕して用いる訳であるが、例えばエンジン等
の鋳物と薄板物とでは、破砕後のかさ比重が、前者は１
．ｏｔ／ｍ”、後者は０．２ｔ／ｒｎ３程度である。こ
のようにその性状が極端に異なってくるので、従来の経
験則に基づく運転管理は非常に難しいものとなって来て
いる。[Problems to be Solved by the Invention] However, in recent years, the properties of raw material scrap have diversified from the viewpoint of recycling, and the operation management of preheating devices has become extremely complicated. Raw material scrap is used after being crushed to make it easier to process, but for example, the bulk specific gravity of castings such as engines and thin plates after crushing is 1.
．． ot/m", and the latter is about 0.2 t/rn3. As the properties are extremely different in this way, operation management based on conventional empirical rules has become extremely difficult.
本発明は上記の事実を考慮し、原料スクラップの性状の
変化に拘らず、運転管理の容易なアルミスクラップの予
熱装置を提供することを目的とする。The present invention has been made in consideration of the above facts, and an object of the present invention is to provide an aluminum scrap preheating device that is easy to operate and manage regardless of changes in the properties of raw material scrap.
［問題点を解決するための手段］
本発明者は、上記目的を達成するために鋭意検討を進め
た結果、まず上記従来装置によって種々の性状の原料を
処理した場合の次の事実に注目した。[Means for Solving the Problems] As a result of intensive studies to achieve the above object, the inventor first focused on the following facts when raw materials with various properties are processed using the above conventional apparatus. .
すなわち、もし平均的な性状の原料スクラップを処理す
る条件で鋳物スクラップのようながさ比重の大きな原料
を予熱装置で処理した場合には、原料が予熱不足となり
、したがって付着油分等の燃焼不足から溶解炉投入部で
油分燃焼による黒煙の発生、或いは原料の溶解不足等の
問題が生じる。また同条件で、薄板物スクラップのよう
ながさ比重の小さな原料を予熱装置で処理した場合には
、スクラップのかさにより律速されて必要な重量だけ処
理ができない、或いは予熱過剰によりスクラップが一部
溶融変形し始め、これが予熱装置出口で固まってブリッ
ジが形成される等の問題が生じる。In other words, if a raw material with a large specific gravity such as foundry scrap is processed in a preheating device under the conditions for processing raw material scrap with average properties, the raw material will be insufficiently preheated, and the melting furnace will be heated due to insufficient combustion of adhering oil, etc. Problems such as generation of black smoke due to oil combustion or insufficient dissolution of raw materials occur at the input section. Furthermore, under the same conditions, if a material with a small bulk specific gravity such as thin plate scrap is processed using a preheating device, the rate is determined by the bulk of the scrap and the necessary weight cannot be processed, or some of the scrap may be melted and deformed due to excessive preheating. This causes problems such as solidification at the outlet of the preheating device and formation of bridges.
以上の事実に基づき、本発明においては、かさ比重の大
きい原料の場合は、予熱装置の回転数を低くして予熱装
置内における原料の滞留時間を長くし、原料を充分に予
熱する必要があり、他方、かさ比重の小さい原料の場合
は、予熱装置の回転数を高くして予熱装置内における原
料の滞留時間を短くし、原料の予熱時間を短くすると共
に、処理体積量を多くしなければならないという結論に
至った。Based on the above facts, in the present invention, in the case of raw materials with a large bulk specific gravity, it is necessary to sufficiently preheat the raw materials by lowering the rotation speed of the preheating device and lengthening the residence time of the raw materials in the preheating device. On the other hand, in the case of raw materials with low bulk specific gravity, it is necessary to increase the rotation speed of the preheating device to shorten the residence time of the raw material in the preheating device, shorten the preheating time of the raw material, and increase the processing volume. I came to the conclusion that it would not.
また上記結論に基づく予熱装置の運転の制御は、アルミ
スクラップのかさ比重と表面積との関係にも相関する。Control of the operation of the preheating device based on the above conclusion also correlates with the relationship between bulk specific gravity and surface area of aluminum scrap.
すなわち、スクラップは破砕後の粒径が５０〜１００■
の範囲では、かさ比重と単位体植当りの総表面積がほぼ
逆比例関係にあり、また熱交換量は表面積（伝熱面積）
の大小が大きな要因であることから、予熱装置の回転数
はアルミスクラップのかさ比重との関係において。In other words, the particle size of scrap after crushing is 50 to 100 cm.
In the range of , the bulk specific gravity and the total surface area per unit plant are almost inversely proportional, and the amount of heat exchange is
The rotation speed of the preheating device is determined in relation to the bulk specific gravity of the aluminum scrap.
ｎ＝ｋ（１／ｃ：ｆ” の式にしたがって制御することが望ましいこととなる。n=k(1/c:f” It is desirable to control according to the formula:
ここで、 ｎ＝予熱装置の回転数 に＝比例定数 Ｃ＝かさ比重 α＝補正係数 である。here, n = rotation speed of preheating device = constant of proportionality C=bulk specific gravity α = correction coefficient It is.
したがって、本発明に係るアルミスクラップの予熱装置
は、アルミスクラップのかさ比重に基づき予熱装置の回
転数を自動的に制御することを特徴とするものである。Therefore, the aluminum scrap preheating device according to the present invention is characterized in that the rotation speed of the preheating device is automatically controlled based on the bulk specific gravity of the aluminum scrap.
より具体的には、本発明の上記目的は、例えばアルミス
クラップのかさ比重を検出する部材と、この検出部材の
検出信号に基づき予熱装置の回転数を制御する部材とを
有する予熱装置によって達成される。More specifically, the above object of the present invention is achieved by a preheating device that includes a member that detects the bulk specific gravity of aluminum scrap, and a member that controls the rotation speed of the preheating device based on a detection signal from this detection member. Ru.
また、本発明にあっては、予熱装置に原料を送る定量振
動フィーダの振幅とアルミスクラップのかさ比重との植
が一定であり、且つ実用範囲において該フィーダの振幅
はこれを決定する励磁回路の可変抵抗の抵抗値にほぼ比
例することに注目した。In addition, in the present invention, the amplitude of the quantitative vibration feeder that feeds the raw material to the preheating device and the bulk specific gravity of the aluminum scrap are constant, and in a practical range, the amplitude of the feeder is determined by the excitation circuit that determines this. We noticed that it is almost proportional to the resistance value of the variable resistor.
すなわち、アルミスクラップの送り重量を一定にしたい
ならば、次の表１の示す関係に基づいて予熱装置の運転
を制御すればよいことになる。That is, if it is desired to keep the aluminum scrap feed weight constant, the operation of the preheating device should be controlled based on the relationship shown in Table 1 below.
表１
したがって、本発明の上記目的は、アルミスクラップの
定量振動フィーダの振幅または該振幅を決定する励磁回
路の可変抵抗の抵抗値を検出する部材と、この検出部材
の検出信号に基づき予熱装置の回転数を制御する部材と
を有する予熱装置によっても達成される。Table 1 Therefore, the above object of the present invention is to provide a member for detecting the amplitude of a quantitative vibration feeder for aluminum scrap or the resistance value of a variable resistor of an excitation circuit that determines the amplitude, and a preheating device based on a detection signal of this detection member. This is also achieved by a preheating device having a rotation speed controlling member.
［作用］
上記構成により本発明に係る予熱装置にあっては、アル
ミスクラップの性状とは関係なく、そのかさ比重に基づ
いて所望の状態に予熱処理することが可能となる。[Function] With the above configuration, the preheating device according to the present invention can perform preheating treatment to a desired state based on the bulk specific gravity, regardless of the properties of the aluminum scrap.
［実施例コ
第１図は本発明予熱装置を適用したアルミスクラップの
溶解プラントを示す説明図である。原料であるアルミス
クラップ１０はホッパ１２に投入されており、該ホッパ
１２の下部に設置された定量振動フィーダ１４によりコ
ンベヤスケール１６上へ供給される。コンベヤスケール
１６上のスクラップはコンベヤ１８によりダブルダンパ
２０を介して予熱装置２２へ送り込まれる。ダブルダン
パ２０は予熱装置２２内への空気のもれ込み、外部への
燃焼排ガスのもれ出しを防止しつつ、原料の受入、排出
を可能とする。予熱装置２２内のスクラップは駆動部材
２４による予熱装＠２２の回転速度により、予熱装置ａ
２２内における滞留時間が決定される。予熱後のスクラ
ップはダブルダンパ２６から溶解炉２８へ送り込まれ最
終的に溶解処理を受ける。[Example 1] FIG. 1 is an explanatory diagram showing an aluminum scrap melting plant to which the preheating device of the present invention is applied. Aluminum scrap 10, which is a raw material, is placed in a hopper 12, and is fed onto a conveyor scale 16 by a quantitative vibration feeder 14 installed at the bottom of the hopper 12. The scrap on the conveyor scale 16 is fed by the conveyor 18 via the double damper 20 to the preheating device 22 . The double damper 20 allows raw materials to be received and discharged while preventing air from leaking into the preheating device 22 and combustion exhaust gas from leaking to the outside. The scrap in the preheating device 22 is moved to the preheating device a by the rotation speed of the preheating device @22 by the drive member 24.
The residence time within 22 is determined. The preheated scrap is sent from the double damper 26 to the melting furnace 28 and finally undergoes melting treatment.
一方、溶解炉２８のバーナ３０から発生する燃焼排ガス
は、溶解炉２８上部の熱交換器３２において、空気ファ
ン３４からの供給空気と熱交換を行い、さらに煙道３６
を通って予熱装置２２内に導入される。予熱装置？？内
において排ガスはアルミスクラップを予熱し、その後煙
道３８を通って系外に排出される。On the other hand, the combustion exhaust gas generated from the burner 30 of the melting furnace 28 exchanges heat with the air supplied from the air fan 34 in the heat exchanger 32 at the upper part of the melting furnace 28.
is introduced into the preheating device 22 through. Preheating device? ? Inside, the exhaust gas preheats the aluminum scrap and is then discharged to the outside of the system through the flue 38.
図中、予熱装ｆ！１２２の回転を制御する部材は符号４
０で示される。制御部材４０はコンベヤスケール１６に
おいて送り重量を計測し、これに基づいて定量振動フィ
ーダ１４の振幅を増減させて送り重量を一定にするよう
に制御する。定量振動フィーダ１４は第２図に示すよう
な制御回゛路をもって作動され１図中５２は可変抵抗、
５４は５ＣＲ１５６は振動フィーダ１４の電磁石を示す
。In the figure, preheating device f! The member that controls the rotation of 122 is designated by reference numeral 4.
Indicated by 0. The control member 40 measures the feed weight on the conveyor scale 16, and controls the feed weight to be constant by increasing or decreasing the amplitude of the quantitative vibration feeder 14 based on this measurement. The quantitative vibration feeder 14 is operated with a control circuit as shown in Fig. 2, and 52 in Fig. 1 is a variable resistor;
Reference numeral 54 indicates an electromagnet of the vibration feeder 14.
振動フィーダ１４の振幅は上記制御部材４０により制御
される可変抵抗５２の抵抗値により変化する電磁石５６
の強弱により決定される。また可変抵抗５２の抵抗値は
制御部材４０にフィードバックされ、前述の如き理論に
基づき予熱装置２２の回転数を制御するための信号とな
る。The amplitude of the vibration feeder 14 is controlled by an electromagnet 56 that changes depending on the resistance value of a variable resistor 52 controlled by the control member 40.
Determined by the strength of Further, the resistance value of the variable resistor 52 is fed back to the control member 40, and becomes a signal for controlling the rotation speed of the preheating device 22 based on the theory described above.
なお、この実施例装置はアルミスクラップの定量振動フ
ィーダの振幅を決定する励磁回路の可変抵抗の抵抗値に
基づき予熱装置の回転数を制御するものであるが、予め
アルミスクラップのかさ比重を計測するような部材を設
け、この部材の信号に基づいて振動フィーダ１４、予熱
装置２２を制御するようにしてもよい。Note that this example device controls the rotational speed of the preheating device based on the resistance value of the variable resistor of the excitation circuit that determines the amplitude of the aluminum scrap quantitative vibration feeder, but the bulk specific gravity of the aluminum scrap is measured in advance. It is also possible to provide such a member and control the vibrating feeder 14 and the preheating device 22 based on the signal from this member.
［発明の効果］
以上説明した通り、本発明に係るアルミスクラップの予
熱装置によれば、スクラップのかさ比重に基づいて予熱
装置の運転が自動的に制御されるため、スクラップの性
状の変化に応じた煩わしい運転管理をする必要がなくな
る。[Effects of the Invention] As explained above, according to the aluminum scrap preheating device according to the present invention, the operation of the preheating device is automatically controlled based on the bulk specific gravity of the scrap. This eliminates the need for troublesome operation management.
第１図は本発明に係る予熱装置の一実施例を示すアルミ
スクラップの溶解プラントを示す説明図、第２図は定量
振動フィーダの制御回路を示す図である。
１Ｏ１１１１・アルミスクラップ
１４・・・定量振動フィーダ
２２−・・予熱装置
２４・・・駆動部材
４０拳・・制御部材
５２・・・可変抵抗FIG. 1 is an explanatory diagram showing an aluminum scrap melting plant showing one embodiment of a preheating device according to the present invention, and FIG. 2 is a diagram showing a control circuit of a quantitative vibration feeder. 1O1111 Aluminum scrap 14 Quantitative vibration feeder 22 Preheating device 24 Drive member 40 Control member 52 Variable resistance
Claims (1)
おいて、溶解炉へ供給するアルミスクラップを連続定量
的に予熱するための回転式予熱装置であって、アルミス
クラップのかさ比重に基づき予熱装置の回転数を自動的
に制御することを特徴とするアルミスクラップの予熱装
置。This is a rotary preheating device for continuously and quantitatively preheating the aluminum scrap supplied to the melting furnace in the process of melting aluminum scrap to produce recycled ingots, and the rotation of the preheating device is based on the bulk specific gravity of the aluminum scrap. An aluminum scrap preheating device that automatically controls the number of aluminum scraps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069684A JPS62225889A (en) | 1986-03-27 | 1986-03-27 | Preheater for aluminum scrap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61069684A JPS62225889A (en) | 1986-03-27 | 1986-03-27 | Preheater for aluminum scrap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62225889A true JPS62225889A (en) | 1987-10-03 |
Family
ID=13409939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61069684A Pending JPS62225889A (en) | 1986-03-27 | 1986-03-27 | Preheater for aluminum scrap |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62225889A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006089332A1 (en) * | 2005-02-24 | 2006-08-31 | Hertwich Engineering Gmbh | Method for melting down small-sized scrap aluminum with thermal pre-treatment |
| JP2013501916A (en) * | 2009-08-14 | 2013-01-17 | パイロテック インコーポレイテッド | Waste heat system |
| CN104776723A (en) * | 2015-03-20 | 2015-07-15 | 卢坤 | Environment-friendly and energy-saving production method for casting melt by using non-ferrous metal |
| KR101704966B1 (en) * | 2016-04-04 | 2017-02-08 | 박만종 | An automatic supply process of material for heat treatment |
-
1986
- 1986-03-27 JP JP61069684A patent/JPS62225889A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006089332A1 (en) * | 2005-02-24 | 2006-08-31 | Hertwich Engineering Gmbh | Method for melting down small-sized scrap aluminum with thermal pre-treatment |
| US8685139B2 (en) | 2005-02-24 | 2014-04-01 | Hertwich Engineering Gmbh | Method for smelting fragmentized aluminum scrap |
| JP2013501916A (en) * | 2009-08-14 | 2013-01-17 | パイロテック インコーポレイテッド | Waste heat system |
| US9459047B2 (en) | 2009-08-14 | 2016-10-04 | Pyrotek, Inc. | Waste heat system |
| CN104776723A (en) * | 2015-03-20 | 2015-07-15 | 卢坤 | Environment-friendly and energy-saving production method for casting melt by using non-ferrous metal |
| KR101704966B1 (en) * | 2016-04-04 | 2017-02-08 | 박만종 | An automatic supply process of material for heat treatment |
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