JP6502274B2 - Incineration ash sorting method and apparatus - Google Patents

Incineration ash sorting method and apparatus Download PDF

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JP6502274B2
JP6502274B2 JP2016022110A JP2016022110A JP6502274B2 JP 6502274 B2 JP6502274 B2 JP 6502274B2 JP 2016022110 A JP2016022110 A JP 2016022110A JP 2016022110 A JP2016022110 A JP 2016022110A JP 6502274 B2 JP6502274 B2 JP 6502274B2
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昌希 早川
昌希 早川
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株式会社エコネコル
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets

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Description

本発明は焼却灰選別方法及び装置に関する。   The present invention relates to an incineration ash sorting method and apparatus.

一般ごみ、産業廃棄物等の廃棄物は焼却処理されており、焼却によって生ずる焼却灰は従来から埋立処分場に埋立処分されている。   Wastes such as general waste and industrial waste are incinerated, and incineration ash generated by incineration is conventionally disposed of in landfills at landfill sites.

近時、資源及び環境を保護する点から、焼却灰に含まれる有価物を回収して有効利用し、併せて埋立処分場への焼却灰の搬入量も低減させることの試みがなされている。   Recently, in order to protect resources and the environment, attempts have been made to recover and effectively use valuable materials contained in incineration ash, and to reduce the amount of incineration ash carried into landfill disposal sites.

特許文献１に記載の焼却灰処理システムは、焼却灰中のセメント原料分（Fe2O3、CaO、Al2O3、SiO2）とミックスメタル（Fe、Cr、Ni、Cu）とをそれらの硬さの違いを利用して分別するものであり、磁性物を分別した後の焼却灰を乾式ボールミルに導入し、軟質のセメント原料分を細かく粉砕する一方において、硬質のミックスメタルを一定程度にまで粉砕する。この粉砕後の焼却灰を篩分機に導入し、分級粒径の小さいセメント原料分と、分級粒径の大きいミックスメタルとを分別し、セメント原料分はセメント原料として再利用され、ミックスメタルはリサイクル業者に売却されるものになる。 The incineration ash processing system described in Patent Document 1 comprises cement raw material components (Fe 2 O 3 , CaO, Al 2 O 3 , SiO 2 ) and mixed metals (Fe, Cr, Ni, Cu) in incineration ash. The incineration ash after separation of magnetic substances is introduced into a dry ball mill, and soft cement raw material is finely pulverized while hard mixed metals are to a certain extent. Grind up to. The crushed incineration ash is introduced into a sieving machine, and the cement raw material having a small classification particle size and the mixed metal having a large classification particle size are separated, the cement raw material is reused as a cement raw material, and the mixed metal is recycled. It will be sold to a vendor.

特開2009-56362号公報JP, 2009-56362, A

特許文献１に記載の焼却灰処理システムは、焼却灰に含まれる有価物を回収して有効利用しようとするものではあるが、焼却灰中にあって軟質で分級粒径が小さくなるセメント原料分と硬質で分級粒径が大きくなるミックスメタルとを単にそれらの２者に分別するものであるに過ぎない。   Although the incineration ash processing system described in Patent Document 1 attempts to recover valuable materials contained in the incineration ash for effective use, it is a cement raw material component that is soft in the incineration ash and has a small classification particle size. And a mixed metal which is hard and has a large classified particle size is merely separated into the two.

従って、特許文献１に記載の焼却灰処理システムでは、焼却灰中の貴金属を含む粒子を、当該貴金属とは異なる金属を含む他の粒子から高い選別精度で選別し、当該貴金属を高品位で回収するところがない。   Therefore, in the incineration ash treatment system described in Patent Document 1, particles containing the noble metal in the incineration ash are separated from other particles containing a metal different from the noble metal with high sorting accuracy, and the noble metal is recovered in high quality There is nothing to do.

本発明の課題は、焼却灰中の貴金属を含む粒子を、当該貴金属とは異なる金属を含む他の粒子から高い選別精度で選別し、当該貴金属を高品位で回収することにある。 An object of the present invention is to sort particles containing a noble metal in incineration ash from other particles containing a metal different from the noble metal with high sorting accuracy and recover the noble metal in high grade.

請求項１に係る発明は、一定の粒径に分級された粒子群からなる焼却灰を乾式比重選別機によって比重選別し、比重の小さい軽量灰を回収するとともに、比重の大きい重量灰を回収し、更に、この重量灰に含まれている非磁着性の貴金属を選別する焼却灰選別方法であって、前記比重選別によって回収した重量灰を、当該重量灰中の磁着性の金属を含む粒子を8000乃至12000ガウスの磁場により磁着する高磁力選別機の移動式ベルト面に投入し、この重量灰中の非磁着性の貴金属を含む粒子を上記の磁着性の金属を含む粒子と選別して回収するようにしたものである。 The invention according to claim 1 separates the incineration ash consisting of the particle group classified to a fixed particle size by a dry specific gravity selector, and recovers a lightweight ash having a small specific gravity, and also recovers a heavy ash having a large specific gravity. And, further, an incineration ash sorting method for sorting non-magnetic noble metals contained in the weight ash, wherein the weight ash recovered by the specific gravity sorting comprises a magnetically attractable metal in the weight ash. The particles are placed on the moving belt surface of a high magnetic separator which magnetically attaches with a magnetic field of 8000 to 12000 gauss, and the particles containing nonmagnetic noble metals in this heavy ash are particles containing the magnetic metals described above. To be collected separately .

請求項２に係る発明は、請求項１に係る発明において更に、前記高磁力選別機は、高磁力の磁場が存在するマグネットドラムと、マグネットドラムに巻き回された移動式ベルトと、移動式ベルトの移動式ベルト面上に重量灰を供給するフィーダとを有し、移動式ベルトの移動式ベルト面に投入された重量灰中の磁着性の金属を含む粒子はマグネットドラムの磁場により磁着され、マグネットドラムの磁場の影響がなくなるまで移動式ベルト上にはり付いた状態で流れ、その磁場の影響がなくなった位置で自重により落下し、当該重量灰中の非磁着性の貴金属を含む粒子はマグネットドラムの磁場に対する反撥力と回転する移動式ベルトによる慣性力により、移動式ベルトから落下するように構成されるようにしたものである。 According to a second aspect of the present invention, in the first aspect, the high magnetic force sorter includes a magnet drum having a magnetic field of high magnetic force, a movable belt wound around the magnetic drum, and a movable belt. And a feeder for supplying weight ash onto the movable belt surface, and particles containing magnetic metal in the weight ash charged onto the movable belt surface of the movable belt are magnetically attached by the magnetic field of the magnet drum Flow on the movable belt until the magnetic field of the magnetic drum disappears, and it falls by its own weight at the position where the magnetic field disappears, and contains non-magnetic precious metals in the weight ash The particles are configured to fall from the moving belt by the repulsive force of the magnet drum against the magnetic field and the inertia force of the rotating moving belt .

請求項３に係る発明は、請求項１又は２に係る発明において更に、前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が小さいとき、高磁力選別機における移動式ベルト面の移動速度を高速側に調整するようにしたものである。 The invention according to claim 3, further in the invention according to claim 1 or 2, when classification particle size weight ash are introduced to the moving belt surface before Symbol high magnetic separator is small, movement in the high magnetic separator The moving speed of the belt surface is adjusted to the high speed side .

請求項４に係る発明は、請求項３に係る発明において更に、前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が2乃至0mmのとき、高磁力選別機におけるベルト面の移動速度を1.6乃至2.0m/sに調整するようにしたものである。 The invention according to claim 4 is the belt according to the invention according to claim 3 when the classification particle size of the weight ash charged to the movable belt surface of the high magnetic force separator is 2 to 0 mm. The moving speed of the surface is adjusted to 1.6 to 2.0 m / s .

請求項５に係る発明は、一定の粒径に分級された粒子群からなる焼却灰が乾式比重選別機によって比重選別され、比重の小さい軽量灰が回収されるとともに、比重の大きい重量灰が回収され、更に、この重量灰に含まれている非磁着性の貴金属が選別される焼却灰選別装置であって、前記比重選別によって回収された重量灰が、当該重量灰中の磁着性の金属を含む粒子を8000乃至12000ガウスの磁場により磁着する高磁力選別機の移動式ベルト面に投入され、この重量灰中の非磁着性の貴金属を含む粒子が上記の磁着性の金属を含む粒子と選別されて回収されるようにしたものである。 In the invention according to claim 5, the incineration ash consisting of the particle group classified to a fixed particle size is subjected to specific gravity selection by the dry specific gravity separator, light weight ash having a small specific gravity is recovered, and weight ash having a large specific gravity is recovered. And, further, an incineration ash sorting apparatus for sorting non-magnetic noble metals contained in the weight ash, wherein the weight ash recovered by the specific gravity sorting is magnetically attached in the weight ash. The metal containing non-magnetic noble metal in the weight ash is charged on the moving belt surface of a high magnetic separator, which magnetically attaches particles containing metal with a magnetic field of 8000 to 12000 gauss, and the magnetic metal mentioned above And particles that are sorted out and collected .

請求項６に係る発明は、請求項５に係る発明において更に、前記高磁力選別機は、高磁力の磁場が存在するマグネットドラムと、マグネットドラムに巻き回された移動式ベルトと、移動式ベルトの移動式ベルト面上に重量灰を供給するフィーダとを有し、移動式ベルトの移動式ベルト面に投入された重量灰中の磁着性の金属を含む粒子はマグネットドラムの磁場により磁着され、マグネットドラムの磁場の影響がなくなるまで移動式ベルト上にはり付いた状態で流れ、その磁場の影響がなくなった位置で自重により落下し、当該重量灰中の非磁着性の貴金属を含む粒子はマグネットドラムの磁場に対する反撥力と回転する移動式ベルトによる慣性力により、移動式ベルトから落下するように構成されるようにしたものである。 In the invention according to claim 6, in the invention according to claim 5, the high magnetic force sorting machine further comprises a magnet drum having a magnetic field of high magnetism, a movable belt wound around the magnet drum, and a movable belt And a feeder for supplying weight ash onto the movable belt surface, and particles containing magnetic metal in the weight ash charged onto the movable belt surface of the movable belt are magnetically attached by the magnetic field of the magnet drum Flow on the movable belt until the magnetic field of the magnetic drum disappears, and it falls by its own weight at the position where the magnetic field disappears, and contains non-magnetic precious metals in the weight ash The particles are configured to fall from the moving belt by the repulsive force of the magnet drum against the magnetic field and the inertia force of the rotating moving belt .

請求項７に係る発明は、請求項５又は６に係る発明において更に、前記高磁力選別機における移動式ベルト面の移動速度が、高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径に応じて調整可能にされてなるようにしたものである。 According to a seventh aspect of the present invention, in the fifth aspect or the sixth aspect of the present invention, the moving speed of the movable belt surface in the high magnetic force sorter is weight ash that is introduced to the movable belt surface of the high magnetic force sorter. It can be adjusted according to the classified particle size .

請求項８に係る発明は、請求項７に係る発明において更に、前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が2乃至0mmのとき、高磁力選別機におけるベルト面の移動速度を1.6乃至2.0m/sに調整可能にされてなるようにしたものである。 The invention according to claim 8 is characterized in that, in the invention according to claim 7 , the belt in the high magnetic force sorter when the classification particle size of the weight ash charged to the movable belt surface of the high magnetic force sorter is 2 to 0 mm. The moving speed of the surface is made adjustable to 1.6 to 2.0 m / s .

(a)乾式比重選別機による比重選別によって非磁着性の金、銀、銅等の貴金属を含む重量灰を回収した後、当該重量灰中の磁着性の金属を含む粒子を8000乃至12000ガウスの磁場により磁着する高磁力選別機の移動式ベルト面に当該重量灰を投入することにより、この重量灰中の非磁着性の金、銀、銅等の貴金属を含む粒子を上記の磁着性の金属を含む粒子に対して高い選別精度で簡易かつ確実に高磁力選別し得るものになり、高品位の貴金属を回収できる。(a) After recovering weight ash containing noble metals such as nonmagnetic gold, silver, copper and the like by specific gravity selection using a dry specific gravity separator, particles containing magnetic metals in the weight ash are 8000 to 12000 By loading the weight ash into the movable belt surface of a high magnetic force sorter magnetically attached by a gaussian magnetic field, particles containing a noble metal such as nonmagnetic gold, silver, copper and the like in the weight ash are The magnetic particles can be easily and reliably subjected to high magnetic force sorting with high sorting accuracy with respect to particles containing magnetic metals, and high-grade precious metals can be recovered.

図１は焼却灰処理システムの主として破砕工程と分級工程とを示す模式図である。FIG. 1 is a schematic view showing mainly a crushing step and a classification step of the incineration ash treatment system. 図２は焼却灰処理システムの主として比重選別工程と高磁力選別工程とを示す模式図である。FIG. 2 is a schematic view showing mainly a specific gravity selection step and a high magnetic force selection step of the incineration ash treatment system. 図３はロータリーインパクトミルを示す模式図である。FIG. 3 is a schematic view showing a rotary impact mill. 図４はエアテーブルを示す模式図である。FIG. 4 is a schematic view showing an air table. 図５は高磁力選別機を示す模式図である。FIG. 5 is a schematic view showing a high magnetic force sorter.

本発明は、一般ごみ、産業廃棄物等の廃棄物の焼却によって生じた焼却灰の処理システムにおいて、廃棄物に混入していた金、銀、銅等の貴金属が付着した貴金属付着粒子を含む焼却灰から該貴金属を回収するとともに、鉛の含有量を低減させた焼却灰を選別するものである。   The present invention relates to a system for treating incineration ash produced by incineration of wastes such as general wastes and industrial wastes, wherein the incineration includes noble metal adhering particles to which noble metals such as gold, silver, copper and the like mixed in wastes are attached. The noble metal is recovered from the ashes, and at the same time, the incineration ash having a reduced content of lead is selected.

ここで、本発明において、焼却灰中の貴金属付着粒子とは、焼却灰中に何らかの形態で存在するに至った貴金属付着粒子であれば何でも良いが、特に、廃棄物の焼却過程で溶融した該廃棄物中の貴金属が焼却前には分離状態にあった該廃棄物中の鉄、陶土等の他の物質に溶着して生成されたものを言う。   Here, in the present invention, the noble metal-adhering particles in the incineration ash may be any noble metal-adhering particles that have been present in the incineration ash in any form, but in particular, they are melted in the waste incineration process. Precious metals in wastes are produced by welding to other substances such as iron and pottery in the wastes which were separated before incineration.

本発明による焼却灰処理システムでは、図１、図２に示す如く、廃棄物の焼却灰に対し、図１に示す磁選工程、破砕工程、分級工程、図２に示す磁選工程、比重選別工程、高磁力選別工程を、以下の如くに順に施す。   In the incineration ash treatment system according to the present invention, as shown in FIGS. 1 and 2, the incineration ash of waste is subjected to the magnetic separation process, the crushing process, the classification process shown in FIG. 1, the magnetic separation process shown in FIG. The high magnetic force sorting step is sequentially performed as follows.

(1)磁選工程（図１）
焼却設備で焼却され、振動篩で一定の粒径に分級された粒子群からなる焼却灰をベルトフィーダ等の定量供給機１０に投入する。 (1) Magnetic separation process (Fig. 1)
The incineration ash which is incinerated in the incinerator and is classified into particle groups classified to a constant particle size by a vibrating sieve is charged into a constant amount feeder 10 such as a belt feeder.

定量供給機１０から搬送コンベヤ１１に定量供給された焼却灰は、吊下げ磁選機１２の下方を通過する過程で、鉄分等の磁性分が除去される。   In the process of passing the lower part of the suspension magnetic separator 12, the incineration ash supplied from the constant amount feeder 10 to the transfer conveyor 11 is removed from the magnetic component such as iron.

(2)破砕工程（図１）
上記(1)で吊下げ磁選機１２を通過した焼却灰は、搬送コンベヤ１３により破砕機２０に投入される。 (2) Crushing process (Figure 1)
The incineration ash that has passed through the suspended magnetic separator 12 in the above (1) is introduced into the crusher 20 by the transport conveyor 13.

破砕機２０は、焼却灰を破砕し、焼却灰中の貴金属付着粒子の表面から貴金属部分を含む貴金属濃縮粒子を削り取る。これにより、破砕機２０は、貴金属濃縮粒子とその他の粒子とを生成する。   The crusher 20 crushes the incineration ash and scrapes the noble metal enriched particles including the noble metal portion from the surface of the noble metal adhering particles in the incineration ash. As a result, the crusher 20 generates precious metal enriched particles and other particles.

破砕機２０としては、例えば図３に示すロータリーインパクトミル１００を採用できる。ロータリーインパクトミル１００は、低速で回転するドラム１０１と、ドラム１０１と同軸をなして高速で回転するローター１０２とを有する。ドラム１０１の内周には複数の反撥板１０３が着脱可能に設けられている。反撥板１０３の間には送り羽根１０４がスパイラル状に取付けられており、ドラム１０１を回転させると、原料投入部１１１から投入された焼却灰がドラム１０１内で落下上昇運動を繰り返しながら原料排出部１１２へ移送される。また、ローター１０２の外周には打撃板１０５が傾斜して等間隔で取付けられている。原料投入部１１１から投入された原料が高速回転するローター１０２の打撃板１０５に落下するとともに、飛び跳ねてくる原料が低速回転するドラム１０１の反撥板１０３に衝突することで、更に細かく粉砕されるものになる。   As the crusher 20, for example, a rotary impact mill 100 shown in FIG. 3 can be employed. The rotary impact mill 100 has a drum 101 rotating at a low speed, and a rotor 102 coaxial with the drum 101 and rotating at a high speed. On the inner periphery of the drum 101, a plurality of repulsive plates 103 are detachably provided. The feed vanes 104 are spirally attached between the repulsion plates 103, and when the drum 101 is rotated, the incineration ash introduced from the raw material input unit 111 repeats falling and rising motion within the drum 101, and the raw material discharge unit It is transported to 112. Further, the striking plate 105 is attached to the outer periphery of the rotor 102 at an equal interval with inclination. The raw material charged from the raw material charging portion 111 falls onto the striking plate 105 of the rotor 102 rotating at high speed, and the jumping raw material collides with the repulsive plate 103 of the drum 101 rotating at low speed, thereby being pulverized further finely. become.

破砕機２０によって焼却灰が破砕される際に発生する粉塵は、吸引送風機２１の吸引負圧が付与されているサイクロン２２、バグフィルタ２３に接続されているロータリーインパクトミル１００の集塵フード１０６から捕集される。バグフィルタ２３は、空気圧縮機２４を伴なう。   The dust generated when the incineration ash is crushed by the crusher 20 is from the dust collection hood 106 of the rotary impact mill 100 connected to the cyclone 22 to which the suction negative pressure of the suction blower 21 is applied and the bag filter 23 It is collected. The bag filter 23 is accompanied by an air compressor 24.

(3)分級工程（図１）
上記(2)の破砕固定で破砕された焼却灰中の貴金属濃縮粒子とその他の粒子とを例えば以下の分級工程によって一定の粒径に分級する。 (3) Classification process (Figure 1)
The noble metal-concentrated particles and the other particles in the incineration ash crushed by crushing and fixing in the above (2) are classified to a predetermined particle diameter, for example, by the following classification step.

１次分級工程では、焼却灰を篩目が5mmの振動篩３１により１次分級し、篩上から粒径5mm越えの粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収し、篩下から粒径5mm以下の粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収する。   In the first classification step, the incineration ash is classified first by the 5 mm vibrating sieve 31, and particles groups exceeding 5 mm in particle diameter (particle groups in which precious metal concentrate particles and other particles are mixed) are collected from the sieve. And collecting a particle group having a particle diameter of 5 mm or less (a particle group in which noble metal-enriched particles and other particles are mixed) from under the sieve.

２次分級工程では、１次分級された粒径5mm以下の粒子群からなる焼却灰を篩目3mmの振動篩３２により２次分級し、篩上から粒径3mm乃至5mmの粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収し、篩下から粒径3mm以下の粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収する。   In the second classification step, incineration ash consisting of particles classified as primary classification particle diameter of 5 mm or less is secondarily classified by a vibrating sieve 32 with a sieve of 3 mm, particle groups of 3 mm to 5 mm in particle diameter from noble metal A particle group in which particles and other particles are mixed is recovered, and a particle group (particle group in which precious metal-enriched particles and other particles are mixed) having a particle diameter of 3 mm or less is recovered from under the sieve.

３次分級工程では、２次分級された粒径3mm以下の粒子群からなる焼却灰を篩目2mmの振動篩３３により３次分級し、篩上から粒径2mm乃至3mmの粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収し、篩下から粒径2mm以下の粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収する。   In the third classification step, incineration ash consisting of particles classified as secondarily classified particles having particle diameter of 3 mm or less is classified thirdly by means of a vibrating sieve 33 with a sieve of 2 mm, particles of particle diameter 2 mm to 3 mm from the sieve A particle group in which particles and other particles are mixed is recovered, and a particle group (particle group in which precious metal-enriched particles and other particles are mixed) having a particle diameter of 2 mm or less is recovered from under the sieve.

４次分級工程では、３次分級された粒径2mm以下の粒子群からなる焼却灰を篩目1mmの振動篩３４により４次分級し、篩上から粒径1mm乃至2mmの粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収し、篩下から粒径1mm以下の粒子群（貴金属濃縮粒子とその他の粒子が混在する粒子群）を回収する。   In the fourth classification step, incineration ash consisting of particles classified with the third classification and having a particle diameter of 2 mm or less is classified fourth by the 1 mm vibrating sieve 34, and particles classified with a particle diameter of 1 mm to 2 mm from the sieve A particle group in which particles and other particles are mixed is collected, and a particle group having a particle diameter of 1 mm or less (a particle group in which noble metal-enriched particles and other particles are mixed) is collected under the sieve.

上記(3)の各振動篩３２乃至３４による各分級工程で分級された各一定粒径（3mm乃至5mm、2mm乃至3mm、1mm乃至2mm、1mm以下）の各焼却灰は、各一定粒径毎に、下記(4)乃至(6)の磁選工程、比重選別工程、高磁力選別工程に導入されて処理される。   Each incineration ash of each fixed particle size (3 mm to 5 mm, 2 mm to 3 mm, 1 mm to 2 mm, 1 mm or less) classified in each classification step by the vibrating sieves 32 to 34 in (3) In the following magnetic separation processes (4) to (6), the specific gravity selection process, and the high magnetic force separation process are introduced and processed.

(4)磁選工程（図２）
上記(3)の各振動篩３２乃至３４による各分級工程で分級された各焼却灰がベルトフィーダ等の定量供給機４０に投入される。定量供給機４０から搬送コンベヤ４１を介して搬送コンベヤ４２に定量供給される焼却灰は、吊下げ磁選機４３の下方を通過する過程で、鉄分等の磁性物が除去される。 (4) Magnetic separation process (Fig. 2)
Each incineration ash classified in each classification step by each of the vibrating sieves 32 to 34 in the above (3) is introduced into a constant amount feeder 40 such as a belt feeder. The incineration ash supplied from the constant amount feeder 40 to the transfer conveyor 42 via the transfer conveyor 41 is removed in the process of passing below the suspended magnetic separator 43, and magnetic substances such as iron are removed.

搬送コンベヤ４１、４２の周囲に発生する粉塵は、局所集塵機４４、４５によって捕集される。   Dust generated around the transport conveyors 41, 42 is collected by the local dust collectors 44, 45.

(5)比重選別工程（図２）
上記(4)で吊下げ磁選機４３を通過した焼却灰は、バケットコンベヤ４６により乾式比重選別機５０に投入される。 (5) Specific gravity sorting process (Fig. 2)
The incineration ash which has passed through the suspended magnetic separator 43 in the above (4) is introduced into the dry specific gravity separator 50 by the bucket conveyor 46.

比重選別機５０は、各振動篩３２乃至３４による各分級工程で分級された各一定粒径の各焼却灰中の粒子を比重選別し、当該焼却灰中の貴金属濃縮粒子をその他の粒子から選別する。   The specific gravity selector 50 selects specific gravity of particles in each incinerated ash of each fixed particle size classified in each classification step by each vibrating sieve 32 to 34, and separates the noble metal concentrated particles in the incinerated ash from other particles. Do.

比重選別機５０は、上記焼却灰の比重選別により、比重の小さい軽量灰Ｌを回収するとともに、比重の大きい重量灰Ｈを回収する。比重選別機５０が比重選別した重量灰Ｈは上記焼却灰中の貴金属濃縮粒子を多く含み、軽量灰ＨＬは上記焼却灰中のその他の粒子を多く含むものになる。尚、比重選別機５０は、上記焼却灰から、鉛の含有量を低減させた軽量灰Ｌを選別するものにもなる。   The specific gravity sorting machine 50 recovers the lightweight ash L having a small specific gravity and the heavy ash H having a large specific gravity by the specific gravity sorting of the incineration ash. The weight ash H specific gravity selected by the specific gravity selector 50 contains a large amount of precious metal-concentrated particles in the incineration ash, and the light weight ash HL contains a large amount of other particles in the incineration ash. The specific gravity sorting machine 50 also sorts out the lightweight ash L having a reduced content of lead from the incineration ash.

比重選別機５０としては、例えば図４に示すエアテーブル２００を採用できる。エアテーブル２００は、所定の角度で傾斜し、バケットコンベヤ４６から投入される焼却灰を受け入れる振動式テーブル面２０１を有し、このテーブル面２０１の下面から上面に空気流を通過させる複数の小通気口をもつスクリーン（網）２０２を備える。エアテーブル２００は、スクリーン２０２を介してテーブル面２０１の下面から上面に吹上げ空気流を及ぼす吹上送風機２０３と、テーブル面２０１の上方からその上面に吸引空気流を及ぼす吸引送風機２０４を有する。エアテーブル２００は、テーブル面２０１に及ぶ吹上空気流と吸引空気流によってテーブル面２０１上の焼却灰をテーブル面２０１の上面から浮かしつつ、テーブル面２０１にその傾斜方向に沿う振動を付与し、比重の大きい重量灰Ｈが下層、比重の小さい軽量灰Ｌが上層となる流動層Ｆをテーブル面２０１上に形成する。下層の重量灰Ｈはテーブル面２０１の斜面から摩擦力と振動力を受けて上方の重量物側へ移動し、上層の軽量灰Ｌは摩擦力と振動力を受けないため下方の軽量物側へ押し流され分別される。   For example, an air table 200 shown in FIG. 4 can be employed as the specific gravity sorting machine 50. The air table 200 has a vibrating table surface 201 which is inclined at a predetermined angle and receives incineration ash input from the bucket conveyor 46, and a plurality of small vents for passing an air flow from the lower surface to the upper surface of the table surface 201. A screen (net) 202 having a mouth is provided. The air table 200 has a blow-up fan 203 that exerts a blow-up air flow from the lower surface to the upper surface of the table surface 201 through the screen 202 and a suction fan 204 that exerts a suction air flow from above the table surface 201 to the upper surface. The air table 200 applies vibration along the inclination direction to the table surface 201 while floating the incineration ash on the table surface 201 from the upper surface of the table surface 201 by the blowing air flow and suction air flow extending to the table surface 201, A fluidized bed F is formed on the table surface 201 in which the heavy weight ash H of the lower layer is the lower layer and the light weight ash L of the smaller specific gravity is the upper layer. The lower weight ash H receives friction and vibration from the slope of the table surface 201 and moves upward to the heavy weight side, and the upper weight ash L does not receive friction and vibration force to the lower weight side It is washed away and separated.

比重選別機５０によって焼却灰が比重選別される際に発生する粉塵は、吸引送風機２０４の吸引負圧が付与されているサイクロン２０５、バグフィルタ２０６に捕集される。バグフィルタ２０６は、空気圧縮機２０７を伴なう。   Dust generated when the incineration ash is subjected to specific gravity selection by the specific gravity selector 50 is collected by the cyclone 205 and the bag filter 206 to which the negative suction pressure of the suction blower 204 is applied. The bag filter 206 is accompanied by an air compressor 207.

(6)高磁力選別工程（図２）
上記(5)の比重選別機５０による比重選別工程で選別された貴金属濃縮粒子を含む重量灰Ｈを高磁力選別機６０によって高磁力選別し、この重量灰Ｈに含まれている非磁着性の金、銀、銅等の貴金属を、磁着性のニッケル、クロム等の金属に対して選別する。 (6) High magnetic force sorting process (Fig. 2)
High magnetic force sorting of heavy ash H containing precious metal enriched particles sorted in the specific gravity sorting step by the specific gravity sorting machine 50 of the above (5) by high magnetic force sorting machine 60 Noble metals such as gold, silver and copper are screened against magnetically attracted metals such as nickel and chromium.

高磁力選別機６０は、例えば図５に示す如く、高磁力の磁場が存在するマグネットドラム６１と、マグネットドラム６１に巻き回されたベルトコンベヤ（移動式ベルト）６２と、ベルトコンベヤ６２のベルト面６２Ａ上に焼却灰を供給するフィーダ６３とを有する。６４はセパレータである。フィーダ６３に供給された焼却灰（重量灰Ｈ）をベルトコンベヤ６２により搬送し、マグネットドラム６１上を通過させ、非磁着物と磁着物の分離を行なう。   For example, as shown in FIG. 5, the high magnetic force sorting machine 60 includes a magnet drum 61 in which a magnetic field of high magnetism is present, a belt conveyor (moving belt) 62 wound around the magnet drum 61, and a belt surface of the belt conveyor 62. And a feeder 63 for supplying incineration ash on 62A. 64 is a separator. The incineration ash (weight ash H) supplied to the feeder 63 is conveyed by the belt conveyor 62, passed over the magnetic drum 61, and the nonmagnetic matter and the magnetic matter are separated.

即ち、フィーダ６３により重量灰Ｈ（金、銀、銅等とニッケル、クロム等が混在する）をベルトコンベヤ６２に供給して搬送させると、磁着性のニッケル、クロム等はマグネットドラム６１の例えば8000乃至12000ガウス、本実施例では10000ガウスもの強力な磁場により磁着され、マグネットドラム６１の磁場の影響がなくなるまでベルトコンベヤ６２上にはり付いた状態で流れ、その磁場の影響がなくなった位置で自重により落下する。一方、非磁着性の金、銀、銅等は、マグネットドラム６１の磁場に対する反撥力と回転するベルトコンベヤ６２による慣性力により、早い時期においてベルトコンベヤ６１から落下し、ニッケル、クロム等とは選別される。   That is, when weight ash H (a mixture of gold, silver, copper etc. and nickel, chromium etc. is mixed) is supplied to the belt conveyor 62 by the feeder 63 and transported, magnetic nickel, chromium etc. A position where the magnetic field is magnetically attached by a strong magnetic field of 8,000 to 12000 gauss, which is 10000 gauss in this embodiment, and flows on the belt conveyor 62 until the influence of the magnetic field of the magnet drum 61 disappears, and the influence of the magnetic field disappears Falls by its own weight. On the other hand, nonmagnetic gold, silver, copper, etc. fall from the belt conveyor 61 at an early stage by the repulsive force of the magnet drum 61 against the magnetic field and the inertial force of the rotating belt conveyor 62, and nickel, chromium, etc. Be sorted out.

しかるに、高磁力選別機６０は、電動モータ６１Ｍによるマグネットドラム６１の回転速度を調整する速度コントローラ６５を有する。ベルトコンベヤ６２に投入される重量灰Ｈの分級粒径が小さいとき、速度コントローラ６５によってベルトコンベヤ６２の移動速度を高速側に調整することで、非磁着性の貴金属と磁着性の金属との選別精度を向上し、非磁着性の貴金属の回収量を向上可能にするものである。   However, the high magnetic force sorter 60 has a speed controller 65 that adjusts the rotational speed of the magnet drum 61 by the electric motor 61M. When the classified particle size of the weight ash H introduced into the belt conveyor 62 is small, the moving speed of the belt conveyor 62 is adjusted to the high speed side by the speed controller 65 to combine the nonmagnetic noble metal and the magnetic metal. It is possible to improve the sorting accuracy of the present invention and to improve the recovery amount of nonmagnetic noble metals.

即ち、高磁力選別機６０のベルトコンベヤ６２に投入される重量灰Ｈの分級粒径が小さいと、ベルト面６２Ａの上に投入されて堆積する単位面積当たりの粒子数が多数になり、上層側に位置する磁着性の金属を含む粒子がベルト面６２Ａとの間に非磁着性の貴金属を含む粒子を挟み込む状況を生じ得る。   That is, when the classification particle size of the weight ash H input to the belt conveyor 62 of the high magnetic force sorter 60 is small, the number of particles per unit area which is input and deposited on the belt surface 62A becomes large, and the upper layer side It is possible to cause a situation in which particles containing magnetically attractable metal located in the are sandwiched between particles containing non-magnetizable precious metal with the belt surface 62A.

このとき、ベルト面６２Ａの移動速度が低いと、ベルト面６２Ａの上に堆積する重量灰Ｈの厚みは厚くなり、より多数の非磁着性の貴金属を含む粒子が、上層側に堆積してマグネットドラムの磁場により当該ベルト面６２Ａに磁力吸引されている磁着性の金属を含む粒子によって当該ベルト面６２Ａとの間に挟み込まれ、磁着性の金属を含む粒子とともに当該ベルト面６２Ａにはり付いた状態で移送され、その磁場の影響がなくなった位置で磁着性の金属を含む粒子とともに落下する。この場合、焼却灰中の非磁着性の金、銀、銅等の貴金属を含む粒子を磁着性の金属を含む粒子に対して高い選別精度で高磁力選別できない。   At this time, if the moving speed of the belt surface 62A is low, the thickness of the heavy ash H deposited on the belt surface 62A becomes thick, and particles containing more nonmagnetic noble metals are deposited on the upper layer side. The magnetic metal particles that are magnetically attracted to the belt surface 62A by the magnetic field of the magnet drum are held between the belt surface 62A and the magnetic metal particles and adhere to the belt surface 62A. It is transported in the attached state, and falls together with the magnetic metal-containing particles at the position where the influence of the magnetic field is lost. In this case, high magnetic force sorting can not be performed on particles containing noble metals such as nonmagnetic metals such as gold, silver and copper in incinerated ash with respect to particles containing magnetic metals with high sorting accuracy.

これに対し、ベルト面６２Ａの移動速度を高速側に調整すると、ベルト面６２Ａの上に体積する重量灰Ｈの厚みは薄くなり、非磁着性の貴金属を含む粒子が、上層側に積層してマグネットドラムの磁場により当該ベルト面６２Ａに磁力吸引される磁着性の金属を含む粒子によって当該ベルト面６２Ａとの間に挟み込まれる機会は少なくなる。また、非磁着性の貴金属を含む粒子がベルト面６２Ａから付与される慣性力は大きなものになる。このため、非磁着性の貴金属を含む粒子が、磁着性の金属を含む粒子によってベルト面６２Ａとの間に挟み込まれて随伴することなく、ベルト面６２Ａから付与された大きな慣性力によって早い時期にベルト面６２Ａから離れて落下する。この場合、焼却灰中の非磁着性の金、銀、銅等の貴金属を含む粒子を磁着性の金属を含む粒子に対し高い選別精度で高磁力選別できる。   On the other hand, when the moving speed of the belt surface 62A is adjusted to the high speed side, the thickness of the weight ash H to be deposited on the belt surface 62A becomes thin, and the particles containing nonmagnetic precious metal are laminated on the upper layer side. There is less chance of being held between the belt surface 62A and the magnetic metal-containing particles attracted magnetically to the belt surface 62A by the magnetic field of the magnet drum. Further, the inertial force applied from the belt surface 62A to the particles containing the nonmagnetic noble metal becomes large. For this reason, the particles containing the nonmagnetic noble metal are quickly inserted by the large magnetic force applied from the belt surface 62A without being accompanied and entrained between the particles containing the magnetic metal with the belt surface 62A. It falls away from the belt surface 62A at a time. In this case, particles containing noble metals such as nonmagnetic metals such as gold, silver and copper in the incineration ash can be subjected to high magnetic force sorting with high sorting accuracy with respect to particles containing magnetic metals.

表１は、前述(3)の分級工程で各分級粒子Ｇに分級された焼却灰のそれぞれについて、前述(5)の比重選別を施して得られた重量灰Ｈを磁場10000ガウスの高磁力選別機６０によって高磁力選別するに際し、ベルトコンベヤ６２の移動速度Ｖを調整したとき、高磁力選別によって回収された銀回収量の調査結果を示したものである。回収量の少量、少量と多量の中間の量、多量、特に多量のそれぞれを、小、中、多、特多によって表示した。   Table 1 shows a high magnetic force classification of a magnetic field 10000 gauss of weight ash H obtained by performing the specific gravity selection of the above (5) for each of the incineration ash classified into each classification particle G in the classification step of the above (3) When the moving velocity V of the belt conveyor 62 is adjusted at the time of high magnetic force sorting by the machine 60, the investigation results of the amount of recovered silver collected by the high magnetic force sorting are shown. A small amount, a small amount and a large amount of intermediate amount, a large amount, particularly a large amount, respectively, were indicated by small, medium, large and extra.

Figure 0006502274
Figure 0006502274

表１によれば、分級粒径Ｇを1〜2mm、更には0〜1mmに細かくするほど、各粒子の含有銀濃度が濃縮される結果、銀回収量を向上できることが認められる。また、高磁力選別機６０のベルト速度Ｖを1.6m/s更には1.8m/sに高速化するほど、銀回収量を向上できることが認められる。高磁力選別機６０のベルト速度Ｖが2.0m/sを越えると、各粒子に付与される慣性力が過大になって磁力選別精度が損なわれる。   According to Table 1, as the classified particle size G is reduced to 1 to 2 mm, and further to 0 to 1 mm, as a result of the contained silver concentration of each particle being concentrated, it is recognized that the silver recovery amount can be improved. It is also recognized that the silver recovery amount can be improved as the belt velocity V of the high magnetic force sorter 60 is increased to 1.6 m / s and further to 1.8 m / s. When the belt velocity V of the high magnetic force sorter 60 exceeds 2.0 m / s, the inertial force applied to each particle becomes excessive and the precision of magnetic force sorting is impaired.

表２は、銀回収量についての表１と同様に、金回収量の調査結果を示したものである。   Table 2 shows the results of investigation of the amount of recovered gold as in Table 1 for the amount of recovered silver.

Figure 0006502274
Figure 0006502274

従って、本実施例によれば以下の作用効果を奏する。
(a)焼却灰を一定の粒径に分級し、この分級された一定の粒径の粒子群からなる焼却灰を湿式比重選別機に比して取扱い簡易な乾式比重選別機５０によって比重選別し、比重の小さい軽量灰Ｌを回収とするとともに、比重の大きい重量灰Ｈを回収することで、鉛の含有量を低減させた軽量灰Ｌを高い選別精度で簡易に選別できる。 Therefore, according to this embodiment, the following effects can be obtained.
(a) Classify the incinerated ash into a fixed particle size, and handle the incinerated ash consisting of the classified particles of the fixed particle size with a specific gravity sorter using a simple dry specific gravity sorter 50 in comparison with a wet specific gravity sorter By collecting the lightweight ash L having a small specific gravity and collecting the heavy ash H having a large specific gravity, it is possible to easily sort the lightweight ash L having a reduced content of lead with high sorting accuracy.

(b)焼却灰を一定の粒径に分級し、この分級された一定の粒径の粒子群からなる焼却灰を湿式比重選別機に比して取扱い簡易な乾式比重選別機５０によって比重選別し、比重の小さい軽量灰Ｌを回収するとともに、比重の大きい重量灰Ｈを回収する。そして、この比重選別によって回収した重量灰Ｈを高磁力選別機６０の移動式ベルト面６２Ａに投入し、この重量灰Ｈ中の非磁着性の金、銀、銅等の貴金属を含む粒子を磁着性の金属を含む粒子に対して高い選別精度で簡易に高磁力選別して回収することにより、当該貴金属を高品位で回収できる。   (b) Classify the incinerated ash into a fixed particle size, and handle the incinerated ash consisting of the classified particles of the fixed particle size with a specific gravity sorter 50 using a simple dry specific gravity sorter 50 in comparison with a wet specific gravity sorter The lightweight ash L having a small specific gravity is recovered, and the heavy ash H having a large specific gravity is recovered. Then, the weight ash H recovered by this specific gravity selection is charged to the movable belt surface 62A of the high magnetic force sorter 60, and particles containing a noble metal such as nonmagnetic gold, silver, copper, etc. in the weight ash H The noble metal can be recovered with high quality by simply performing high magnetic force sorting and recovering with high sorting accuracy with respect to particles containing magnetically bonding metal.

(c)前述(a)、(b)の乾式比重選別機５０としてエアテーブル２００を用いることにより、軽量灰Ｌと重量灰Ｈの選別作業性、選別精度を向上できる。   (c) By using the air table 200 as the dry specific gravity separator 50 described in (a) and (b) above, it is possible to improve the selection workability and the selection accuracy of the light weight ash L and the weight ash H.

以上、本発明の実施例を図面により詳述したが、本発明の具体的な構成はこの実施例に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like within the scope of the present invention. Included in the present invention.

また、本発明によれば、焼却灰中の貴金属を含む粒子を、当該貴金属とは異なる金属を含む他の粒子から高い選別精度で選別し、当該貴金属を高品位で回収できる。   Further, according to the present invention, particles containing the noble metal in the incineration ash can be sorted out from other particles containing a metal different from the noble metal with high sorting accuracy, and the noble metal can be recovered with high grade.

５０ 乾式比重選別機
６０ 高磁力選別機
６２Ａ 移動式ベルト面
２００ エアテーブル
Ｌ 軽量灰
Ｈ 重量灰 50 dry specific gravity separator 60 high magnetic separator 62A mobile belt surface 200 air table L lightweight ash H weight ash

Claims (8)

一定の粒径に分級された粒子群からなる焼却灰を乾式比重選別機によって比重選別し、比重の小さい軽量灰を回収するとともに、比重の大きい重量灰を回収し、更に、この重量灰に含まれている非磁着性の貴金属を選別する焼却灰選別方法であって、
前記比重選別によって回収した重量灰を、当該重量灰中の磁着性の金属を含む粒子を8000乃至12000ガウスの磁場により磁着する高磁力選別機の移動式ベルト面に投入し、この重量灰中の非磁着性の貴金属を含む粒子を上記の磁着性の金属を含む粒子と選別して回収する焼却灰選別方法。 The incineration ash consisting of particle groups classified to a fixed particle size is subjected to specific gravity selection by a dry specific gravity separator to recover light weight ash having a small specific gravity, and to recover heavy ash having a large specific gravity, and further contained in this weight ash An incineration ash sorting method for sorting non-magnetic noble metals, comprising:
The weight ash collected by the specific gravity selection is introduced into a moving belt surface of a high magnetic force sorter for magnetically attaching particles containing magnetic metals in the weight ash with a magnetic field of 8000 to 12000 gauss, and the weight ash An incineration ash sorting method of sorting and recovering particles containing a nonmagnetic noble metal in the particles from particles containing the magnetic metal described above . 前記高磁力選別機は、高磁力の磁場が存在するマグネットドラムと、マグネットドラムに巻き回された移動式ベルトと、移動式ベルトの移動式ベルト面上に重量灰を供給するフィーダとを有し、移動式ベルトの移動式ベルト面に投入された重量灰中の磁着性の金属を含む粒子はマグネットドラムの磁場により磁着され、マグネットドラムの磁場の影響がなくなるまで移動式ベルト上にはり付いた状態で流れ、その磁場の影響がなくなった位置で自重により落下し、当該重量灰中の非磁着性の貴金属を含む粒子はマグネットドラムの磁場に対する反撥力と回転する移動式ベルトによる慣性力により、移動式ベルトから落下するように構成される請求項１に記載の焼却灰選別方法。 The high magnetic force sorting machine has a magnet drum in which a magnetic field of high magnetism is present, a movable belt wound around the magnetic drum, and a feeder for supplying weight ash onto the movable belt surface of the movable belt. The particles containing magnetic metal in the weight ash, which are put on the movable belt surface of the movable belt, are magnetically attached by the magnetic field of the magnetic drum and run on the movable belt until the magnetic field of the magnetic drum disappears. It flows in the attached state, falls by its own weight at the position where the influence of the magnetic field disappears, and the particles containing the nonmagnetic noble metal in the heavy ash are repelled by the magnetic drum against the magnetic field and the inertia by the rotating moving belt. The method of claim 1, wherein the method is configured to fall from the moving belt by force . 前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が小さいとき、高磁力選別機における移動式ベルト面の移動速度を高速側に調整する請求項１又は２に記載の焼却灰選別方法。 The high time classification particle size weight ash is introduced into the mobile belt surface of the magnetic separator is small, according to claim 1 or 2 for adjusting a moving speed of the moving belt surface at high magnetic separator at a high speed side Incineration ash sorting method. 前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が2乃至0mmのとき、高磁力選別機におけるベルト面の移動速度を1.6乃至2.0m/sに調整する請求項３に記載の焼却灰選別方法。The moving speed of the belt surface in the high magnetic force sorter is adjusted to 1.6 to 2.0 m / s when the classification particle size of the weight ash input to the movable belt surface of the high magnetic force sorter is 2 to 0 mm. The incineration ash sorting method as described in. 一定の粒径に分級された粒子群からなる焼却灰が乾式比重選別機によって比重選別され、比重の小さい軽量灰が回収されるとともに、比重の大きい重量灰が回収され、更に、この重量灰に含まれている非磁着性の貴金属が選別される焼却灰選別装置であって、
前記比重選別によって回収された重量灰が、当該重量灰中の磁着性の金属を含む粒子を8000乃至12000ガウスの磁場により磁着する高磁力選別機の移動式ベルト面に投入され、この重量灰中の非磁着性の貴金属を含む粒子が上記の磁着性の金属を含む粒子と選別されて回収される焼却灰選別装置。 The incineration ash consisting of particle groups classified to a fixed particle size is subjected to specific gravity selection by a dry specific gravity separator, and light weight ash having a small specific gravity is recovered, and heavy ash having a high specific gravity is recovered. An incineration ash sorting apparatus for sorting non-magnetic precious metals contained therein, comprising
The weight ash recovered by the specific gravity sorting is introduced to the moving belt surface of a high magnetic force sorter for magnetically attaching particles containing magnetic metals in the weight ash with a magnetic field of 8000 to 12000 gauss. An incineration ash sorting apparatus in which particles containing nonmagnetic noble metals in ash are separated from particles containing magnetic metals described above and recovered. 前記高磁力選別機は、高磁力の磁場が存在するマグネットドラムと、マグネットドラムに巻き回された移動式ベルトと、移動式ベルトの移動式ベルト面上に重量灰を供給するフィーダとを有し、移動式ベルトの移動式ベルト面に投入された重量灰中の磁着性の金属を含む粒子はマグネットドラムの磁場により磁着され、マグネットドラムの磁場の影響がなくなるまで移動式ベルト上にはり付いた状態で流れ、その磁場の影響がなくなった位置で自重により落下し、当該重量灰中の非磁着性の貴金属を含む粒子はマグネットドラムの磁場に対する反撥力と回転する移動式ベルトによる慣性力により、移動式ベルトから落下するように構成される請求項５に記載の焼却灰選別装置。 The high magnetic force sorting machine has a magnet drum in which a magnetic field of high magnetism is present, a movable belt wound around the magnetic drum, and a feeder for supplying weight ash onto the movable belt surface of the movable belt. The particles containing magnetic metal in the weight ash, which are put on the movable belt surface of the movable belt, are magnetically attached by the magnetic field of the magnetic drum and run on the movable belt until the magnetic field of the magnetic drum disappears. It flows in the attached state, falls by its own weight at the position where the influence of the magnetic field disappears, and the particles containing the nonmagnetic noble metal in the heavy ash are repelled by the magnetic drum against the magnetic field and the inertia by the rotating moving belt. The incineration ash sorting apparatus according to claim 5 , wherein the apparatus is configured to fall from the moving belt by force . 前記高磁力選別機における移動式ベルト面の移動速度が、高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径に応じて調整可能にされてなる請求項５又は６に記載の焼却灰選別装置 The moving speed of the movable belt surface in the high magnetic separator is, according to claim 5 or 6 formed by adjustable in accordance with the classification particle size weight ash is introduced into the mobile belt surface of the high magnetic separator Incineration ash sorting equipment 前記高磁力選別機の移動式ベルト面に投入される重量灰の分級粒径が2乃至0mmのとき、高磁力選別機におけるベルト面の移動速度を1.6乃至2.0m/sに調整可能にされてなる請求項７に記載の焼却灰選別装置。The moving speed of the belt surface in the high magnetic force sorter can be adjusted to 1.6 to 2.0 m / s when the classification particle size of the weight ash input to the movable belt surface of the high magnetic force sorter is 2 to 0 mm The incineration ash sorting device according to claim 7.
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