Separation of Metal Components from Abrasion Powder by Using Reverse of Gravity Sedimentation Method

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લणணಅԳ࣑ଡଲ૳෉ඍ1$#઴ॸं஼ଭׁুনंंࠤ

׌ઽ஼

Â ଲ୨ผ

Â ହ஼෹

Â ଲ୍వ

Â ੲஂւ

Â ଲ୍ߡ

Separation of Metal Components from Abrasion Powder by Using Reverse of Gravity Sedimentation Method

Youngjin Kim, Junghoon Lee, Jinho Lim, Jae-chun Lee, Jong-gwan Ahn and Jaeryeong Lee

Abstract : In previous research, our research group has studied about disassembly of electric/electronic components from wasted printed circuit boards (WPCBs) by using surface grinding method. During this procedure, 13.9 wt%

of WPCBs was occurred to abrasion powders, which contained a mess of metals about 29.8 wt%. As a subsequent research, the authors have tested for elutriation method (reverse of gravity sedimentation) to separation of metal phase components from the abrasion powder. As for the range of +100 mesh size in abrasion powder, 97.5 wt%

of metals could be recovered at a 7 mm/s of upward-velocity in liquid-phase medium, the tube height of 100 mm.

whereas, in the case of +100 mesh size in powder, metal recovery decreases with a decrease of powder sizes.

This implies the settling velocity and its gap between metal and non-metal components decrease in proportion to their sizes.

Key words : Wasted printed circuit board, Abrasion powder, Elutriation method(reverse of gravity sedimentation), Grade, Recovery

څ أ WPCBقप॥ʽܳڅŚ՚(Cu, Fe), ŊŚ՚(Au, Ag)Ӽχ؉ɦ͆й͟ۆŚ՚ՁқںধսॠČڮ३Ś՚

ۆߌνমڱںݒÀ֨ࢅşڦॢٍĵͿ, ٍ҆ĵŔΝقԴəşćۺٍԑѪںۋڌ३ۻşۻۙҙुں࢐ä֨ࢅə

ٍĵε ьशॠٕɰ. दPCBə ٍԑߌνε ࣀ३, ҙुۋ ࢐äʽ şࣺ(dismantled PCB), ࢐äʽ ۻşۻۙҙु

(electric/electronic components, EECs) ŔνČٍԑқݕ(abrasion powder)ڷͿধսʼؽɰ. ٍ҆ĵقԴəŚ՚Ձ қۋ29.8wt% ॥ڮʽٍԑқݕڷͿҙࢢŚ՚Ձқںқνॠşڦ३ًҼܼࠞÌѪ(Elutriation method, reverse of gravity sedimentation)ںۋڌॠٕɰ. +100 mesh қݕۆąڍ, ؚԜϔݗԜ֧՚ʪ7 mm/s, ࣜҵȭۋ100 mm

՚ʪфࣜҵۆȭۋѺজق˰δŚ՚Ձқۆुڦфধսڱۆ޲ۋÀäۆǣࢍǣݓ؍ؕڷ϶ؚԜϔݗԜ֧՚

ʪ1 mm/s, ࣜҵȭۋ100 mmܓæقԴ35.7%ۆŚ՚ुڦф28.9%ۆধսڱںǣࢍǴؽɰ. ۋəٍԑқݕۆ

ۓۙࡾşÀۚ؉ݙق˰͆Ś՚/ҼŚ՚ՁқۓۙÂܛϊࠞÌ՚ʪۆ޲ۋÀÇՙʼرؚԜϔݗęʴ֨قʴъ

ҙڮʽĀęͿࣺɳʽɰ.

ܳڅر दۍթধͿşࣺ, ٍԑқݕ, ًҼܼࠞÌ, ुڦ, ধսڱ

2013ț10ښ15ێۿս, 2013ț10ښ29ێ֮ԐٰΒ 2013ț12ښ12ێóۦঝ܁

1) Ìڙʂॡİقȃݓۙڙėॡę 2) ॢĶݓݗۙڙٍĵڙġНۙڙٍĵ҆ҙ 3) ܼڙʂॡİۙڙտঞঞąėॡę

*Corresponding Author(ۋۦͺ) E-mail; [email protected]

Address; Department of Energy & Resources Engineering, Kangwon National University Chuncheon, Kangwon-do, 200-701

ISSN 2288-2790(online) http://dx.doi.org/10.12972/ksmer.2013.50.6.781

Դ΁

दۍթধͿşࣺ(wasted printed circuit board, WPCB) ͿҙࢢڮڌŚ՚Ձқںধսॠşڦॢۻߌνė܁ڹࡾ

ó2ÀݓѓѪڷͿқΪॣսەɰ. ߒѥݫė܁ڷͿə

ۻş/ۻۙҙु(electric/electronic components, EECs)ۋ

ۤ޳ʽԜࢗۆWPCBεࣷ/қթॢ঳Ś՚ՁқںԸѻ ॠəѓѪęWPCBقۤ޳ʽҙुں࢐ä֨ࢇ঳, қν

ٍĵȦЛ

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Fig. 1. The weights and proportions of the three products after disassembling treatment using the apparatus.

ʽԓНͿҙࢢŚ՚ՁқںধսॠəѓѪۋɰ(Li et al., 2006; Eswaraiah et al., 2008; Wu et al., 2008; Das et al., 2009; Duan et al., 2009; Yoo et al., 2009; Kumar et al., 2010; Wu and Zhang, 2010; Duan et al., 2011;

Guo et al., 2011). ߒѥݫė܁ڹɰتॢܛΪۆPCBق

ۺڌۋ Àɠॠݓχ ĵν(Cu), ߏ(Fe)ˣ ܳڅŚ՚ę Ś (Au), ڹ(Ag)ˣۆŊŚ՚χںধսॠəė܁ڷͿҙ޳

ʽҙुق॥ڮʽй͟ۆৠڮŚ՚Ձқęڮ३ܼŚ՚

ধսфқνəҝÀɠॠɰ(Eswaraiah et al., 2008; Wu et al., 2008; Das et al., 2009; Duan et al., 2009; Yoo et al., 2009; Guo et al., 2011).

दPCBقҙ޳ʽҙुںқνॠəѓѪڷͿəşćۺ,

َۺ, জॡۺѓѪۋٍĵʼČەɰ. ॠݓχَߌνѓ֩

ڹҙुۤ޳ѓ֩ق˰͆ҙुۆқνমڱۋɵ͆ݓČ, জॡۺߌνѓ֩ڹदPCB ĵܓق˰͆ҙुқνÀ܃

ॢʼə ɳ۾ں ÀݓČ ەɰ(Li et al., 2006; Wu and Zhang, 2010; Duan et al., 2011). ۋقٍ҆ĵŔΝقԴ əɰتॢܛΪۆPCBقۺڌۋÀɠॢٍԑѪںۋڌ ॠي ۻşۻۙҙुں ࢐ä֨ࢅə ٍĵε ьशॠٕɰ (Kim et al., 2012; Lee at al., 2012). ۋė܁ںࣀ३

ߌνʽदPCBəҙुۋ࢐äʽşࣺ(dismantled board), ҙु(electric/electronic components, EECs), ٍԑқݕ (abrasion powder)ԜࢗͿধսʼؽɰ. ÁԓНۆŚ՚ु

ڦə EECs(48.9%), abrasion powder(29.8%), dismantled board(7.5%) տڷͿঝۍʼؽɰ. ۋܼEECsٮdismantled PCBəÁۦݗ࣢Ձقϑəࣷ/қթė܁ۋ߸Àʽ঳

قŚ՚ՁққνεڦॢԸѻė܁ق࣊ۓۋÀɠॠݓχ

ٍԑқݕۆąڍəқϊԜࢗͿধսʼر߸Àۺۍࣷ/

қթė܁ػۋԸѻÀɠॠٕɰ. ࣢০ٍԑқݕق॥ڮ ʽŚ՚ՁқڹܳͿĵν, Ǭ, ؉ٍ(Zn)ڷͿܓԐʼؽڷ

϶, ۋ͠ॢŚ՚Ձқںߌνॠݓ؍Čѓ࠘ॣąڍۙڙ ǯҼəН΁߸Àۺۍঞą١ّфԦࢗćق؊ٖॳں

ܶսەɰČࣺɳʽɰ. ۋقٍ҆ĵقԴəٍԑқݕڷ ͿҙࢢŚ՚Ձқںқνॠşڦ३ۓʪқśں֬֨ॠٕ

Č, ÁĵÂѻًҼܼԸѻ(elutriation method, reverse of gravity sedimentation)Ѫں֬֨, ܓæѻŚ՚Ձқۆধ սڱę ुڦε ܓԐॠٕɰ.

֬ॹѓѪ

֬ॹڙΒ

҆֬ॹقԐڌʽदPCBͿҙࢢҙुқνεڦॢٍԑ ߌν঳, ьԦԓНڹFig. 1ęÏۋܓԐʼؽɰ. ۋٍܼ

ԑқݕ(abrasion powder)ڹ ۻߕ ԓН ܼ 13.9 wt%

(439.2 g)Ϳ, ٍԑқݕق प॥ʽ Ś՚ۆ Ҽڱڹ 29.8 wt%(130.9 g/439.2g)Ϳঝۍʼؽɰ(Fig. 1).

ٍԑқݕقप॥ʽŚ՚Ձқ, Ś՚॥͟(wt%)ںFig. 2 قǣࢍǴؽɰ. қݕǴŚ՚ՁқڹCu 20.1 wt% Pb 4.7 wt%, Al 2.9 wt%, Fe 1.2 wt%տڷͿܓԐʼؽɰ. ۋ͠

ॢқݕǴŚ՚ՁқڹPCBۆ࣢ՁԜ, ۻۙҙुۆۤ޳

ںڦ३Ԑڌʽsoldering, şࣺǴҙۆCu ۻʪࠗۋٍ

ԑę܁قԴқݕڷͿьԦॢĀęͿࣺɳʼ϶, ٍ҆ĵق Դəٍԑқݕقप॥ʽܳڅŚ՚6 ܛΪ(Al, Cu, Fe, Ni, Pb, Zn)εধսʂԜŚ՚ՁқڷͿԸ܁ॠي֬ॹॠٕɰ.

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Fig. 2. Metal and non-metal weight ratio and each metals contents for abrasion powder.

Fig. 3. Schematic diagram of this experiment.

Table 1. The result of the total weight and metal weight with a change of size ranges for abrasion powder Particle size +100 mesh

(150 )

100 × 140 mesh (150105 )

140 × 200 mesh (10575 )

200 mesh

(75 ) total

Total

weight (g) 103.9 44.7 91.1 199.5 439.2

Metal

weight (g) 59.3 17.3 20.4 33.9 130.9

Table 1ڹۓʪĵÂѻИóҼڱфŚ՚Ձқۆ॥͟

(g)ں ܓԐॢ Āęۋɰ. ٍԑқݕں 4Ò ĵÂ(+100, 100×140, 140×200, 200 mesh)ڷͿۓʪқśॢĀę, 100 mesh ࣀęٍԑқݕۆąڍۓۙࡾşÀۚ؉ݗս΀

ٍԑқݕۆИóҼڱۋݒÀॠٕڷǣ, ٍԑқݕǴŚ՚

Ձқۆ॥͟ڹۻߕۓʪĵÂقԴۓۙࡾşÀۚ؉ݗս

΀Ś՚॥͟ۋÇՙʼəąॳںǣࢍǴؽɰ(+100 mesh:

57.1 wt%, 100×140 mesh: 38.7%, 140×200 mesh: 22.4%,

200 mesh: 17%.). ۋəŚ՚ۆۻՁقۆ३ٍԑę܁

قԴҼİۺࢀۓۙۆқݕڷͿьԦॢĀęͿࣺɳʽɰ.

֨Βф֬ॹѓѪ

ٍԑқݕڷͿҙࢢ Ś՚Ձқں қνॠş ڦॢ ֬ॹѓ ѪڹԜ֧ॠəėşǣڮߕۆ৔ζںۋڌ३ۓۙεқ νॠəElutriation methodεۋڌॠٕɰ. ۋѓѪڹً

ҼܼࠞÌė܁(reverse of gravity sedimentation)ڷͿstokes’

lawÀۺڌʼرÁۓۙۆҼܼфࡾş޲ۋͿҙࢢь ԦʼəÁۓۙۆࠞÌ՚ʪ޲ۋεۋڌॢԸѻѪۋɰ (Wills and Napier-Munn, 2006; Murugan et al., 2008;

Hettler et al., 2011).

ٍ҆ĵقԴəČҼܼۆŚ՚(metal)Ձқę۹Ҽܼۆ

ҼŚ՚(non-metal)Âۆқνεڦ३ۋѓѪںۺڌॠٕ

ڷ϶, ؚԜϔݗ(medium)ں֨Βۆۓۙқԓںڦ३ট ڌॠٕɰ.

֬ॹۤ࠘əFig. 3ęÏۋǴҙݔąۋ5 mmۍࣜҵ

(tube)εؚԜϔݗۋɺšҼ࠶قČ܁ॢ঳, ࣜҵٍʴ

֩ۆ ˥ݓࢥ ÀѺ՚ʪܓۼ ܁͟ऒ॒(BT100-2J, longer precision pump)قۤ޳ॠٕɰ. Ҽۋ࠶قٍĀʽࣜҵ ۆъʂठڹȭۋ500 mmۍज़ࢢҙ޳঍࠺ͤ(CL1040- 25500, Vissal) ॠɳҙۆࣜҵٍĀҙқقۤ޳ॠيऒ

॒εÀʴ֨ࢉڷͿ׆࠺ͤॠҙͿҙࢢؚԜϔݗۋ࣊ۓ

ʾսەʪ΀Ժ࠘ॠٕɰ. ٍԑқݕڹ࠺ͤԜҙقԴ࣊

ۓʼؽڷ϶, ࠺ͤۆԜҙقəॠҙͿҙࢢԜ֧ʼرѕ߻

ʼəؚԜϔݗںধսॣսەʪ΀ѻÒۆࣜҵεٍĀ

ॢ঳ъʂठҙқںҼۋ࠶قČ܁ॠيѕ߻ʼəؚԜ ϔݗں ধսॣ ս ەʪ΀ĵՁॠٕɰ.

ࣜҵεࣀ३ধսʽؚԜϔݗę࠺ͤǴҙۆؚԜϔݗ ڹÁÁČؚқνॠٕڷ϶, ֬ॹقԐڌʽؚԜϔݗ ڹ1޲ݒΪսققࣲ؎ࡔ(ethyl alcohol, 94%, Dae Jung, Korea)ںঔ०ॠيԐڌॠٕɰ. ֬ॹܓæڷͿə࠺ͤȭ ۋфǴą(500 mm, 25 mm), ֨Β࣊ۓ͟(10 g), ऒ॒

ۚʴ֨Â(10 min.)ںČ܁ॠٕڷ϶, ࣊ۓ֨Βۆۓʪĵ Â(+100, 100×140, 140×200, 200 mesh), ࠺ͤॠҙ Ϳҙࢢࣜҵۆȭۋ(100, 200, 400 mm), ؚԜϔݗۆԜ

֧՚ʪ(0.5, 1, 3, 5, 7 mm/s)εҼİܓæڷͿ֬ॹں֬

֨ॠٕɰ.

֬ॹںࣀ३ধսʽࠞÌԓНͿқνʽՁқф॥͟

ڹ Chemical Digestionں ۋڌॠي ٰۻ ڌ३֨ࢇ ˏ, ڮʪĀ०॔͆݋υ(ICP, Optima 7300DV, PerkinElmer, USA)εۋڌॠيқԵॠٕɰ.

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Fig. 4. The characteristic of wettability of abrasion powder with change of a ratio of ethyl alcohol.

Fig. 5. Grade and recovery for metals with change of the particle size.

ĀęфČ޶

Fig. 4əًҼܼࠞÌė܁ق࣊ۓʼəؚԜϔݗۆܓ æںԺ܁ॠşڦॢ֬ॹڷͿ, ؚԜϔݗǴঔ०Ҽ(0, 10, 20, 30 vol%)εѺজ֨ࡈܵҼॠٕɰ. 500 ml Ҽۋ࠶ق

ٍԑқݕ5 gں࣊ۓ, 5 min.Â܁࠘ॢ঳қԓԜࢗε

ঝۍॠٕɰ. قࣲ؎ࡔ10 vol%ۋǴঔ०ʽڌؚۆąڍ,

ٍԑқݕۋؚԜϔݗǴقқԓʼݓ؍ڹԜࢗͿć՚

ڮݓʼؽɰ. ъϸققࣲ؎ࡔۆ॥͟ۋݒÀ॥ق˰͆

ؚԜϔݗǴٍԑқݕۆқԓۋڌۋॠٕڷ϶, قࣲ؎ࡔ ۆ॥͟30 vol% ܓæقԴʂҙқۆٍԑқݕۋқԓԜ ڷͿܕۦ॥ںঝۍॣսەؽɰ. ۋəؚԜϔݗڌؚǴ

قࣲ؎ࡔںߐÀ॥ق˰ؚ͆ԜϔݗۋÀݕशϸۤͳۋ

ÇՙʼČ, қݕǴܕۦॠəͪݕˣڮşНۋϔݗǴق

ঔ०ʼş˺Лۋɰ. ۋ঳ًҼܼࠞÌ֬ॹۆϔݗǴق

ࣲ؎ࡔڹ 30 vol% ঔ०ڷͿ Č܁ॠٕɰ.

Fig. 5ə҆֬ॹقԴԐڌॢ࠺ͤقԴؚԜϔݗۆԜ

֧՚ʪ(3 mm/s), ऒ॒ۚʴ֨Â10 min., ॠҙͿҙࢢࣜ

ҵۆ ȭۋε 400 mmͿ Č܁ॢ ԜࢗقԴ ۓʪĵÂں

+100, 100×140, 140×200, 200 meshڷͿѺজ֨ࡈ֬

ॹॢ Āęۋɰ. Á ۓʪĵÂѻ Ś՚ۆ ुڦə +200 mesh ܓæقԴ ۓʪۆ ࡾşÀÇՙॣս΀ ݒÀॠٕɰ (ݒÀڱ: +100 mesh: 57.1% G72.01%, 140×200 mesh:

22.4% G75.75%). ъϸ, ۓۙۆࡾşÀۚ؉ݗս΀Ś śü০ÇՙʼرŚ՚ुڦ44.1%, ধսڱ34.5%Ϳঝۍ ʼؽɰ. ۋəŚ՚ՁқۆۓʪÀ࠶ݗս΀ۓۙۆԜʂ ۺࠞÌ՚ʪ޲ÀݒÀʼر, ؚԜϔݗںধսॠəࣜҵۆ

ȭۋ(400 mm)ūݓ Ԝ֧ॠə ۓۙۆ Ҽڱۋ Çՙʼş

˺ЛقǣࢍǦĀęͿࣺɳʽɰ(Wills and Napier-Munn, 2006). ˰͆Դۓۙࡾş200 meshεşܵڷͿؚԜϔݗ ۆԜ֧՚ʪε+200 mesh(1, 3, 5, 7 mm/s), 200 mesh (0.5, 1, 3, 5 mm/s)Ϳǣɀرۋ঳֬ॹں֬֨ॠٕɰ.

Fig. 6(a, b, c)ڹ࠺ͤۆȭۋ(500 mm) фǴą(25 mm),

ऒ॒ۚʴ֨Â10 min., ॠҙͿҙࢢࣜҵۆȭۋ(400 mm) εČ܁ॢԜࢗقԴۓʪĵÂѻؚԜϔݗۆԜ֧՚ʪ(1, 3, 5, 7 mm/s)εѺজ֨ࡈ֬ॹॢĀęۋɰ. ۓʪĵÂۋ

+100 mesh قԴəؚԜϔݗۆԜ֧՚ʪÀݒÀ॥ق˰

͆ࠞÌНݗͿধսʼəŚ՚ۆुڦÀć՚ۺڷͿݒÀ ʼؽڷǣধսڱقəࢀٖॳںй࠘ݓ؍ؕɰ. ۋəۓ ąۋࢀŚ՚қϊۆąڍ, ҼŚ՚ۓۙقҼ३Ҽܼۋࡾ

Č, ϔݗۆ Ԝ֧՚ʪÀ ݒÀʼʌ͆ʪ Ԝʂۺ ࠞÌ՚ʪ

޲Àࡾş˺Лقۋق˰δٖॳںäۆыݓ؍Čࠞ

ÌʽԜࢗͿڮݓʼəъϸ, ҼŚ՚ۓۙəϔݗۆ՚ʪ ݒÀٮ॥ƍ֖óԜҙͿѕ߻ʼş˺ЛقǣࢍǦĀę Ϳࣺɳʽɰ(Fig. 6(a)). 100×140, 140×200 mesh ĵÂۆ

ąڍϔݗۆԜ֧՚ʪݒÀٮ॥ƍࠞÌʽŚ՚Ձқۆ

ुڦəݒÀ, ধսڱڹ۾޲ÇՙʼəąॳںǣࢍǴؽ ɰ. ࣢০Ԝ֧՚ʪ1 mm/sقԴ3 mm/sڷͿݒÀʼəĵ ÂقԴŚ՚ۆुڦÀśü০ݒÀʼؽəʚ, ۋəÁĵ ÂۆŚ՚ۓۙٮҼŚ՚ۓۙÂқνεڦ३Դə1 mm/s ۋԜۆϔݗ՚ʪÀڅĵʼݓχ, ۋ҃ɰȭڹϔݗԜ֧՚

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Fig. 6. Grade and recovery of metals with change of the rising velocity of medium (a) +100 mesh, (b) 100×140 mesh, (c) 140×200 mesh, (d) 200 mesh.

ʪقԴəŚ՚ՁқۆۓؚܼۙԜϔݗۆ՚ʪݒÀق

˰͆ҼŚ՚ۓۙٮ॥ƍҙڮʼəŚ՚ۋьԦʼرǣ

ࢍǦ ĀęͿ ࣺɳʽɰ.

Fig. 6(d)əFig. 6(a, b, c)ٮʴێॢܓæقԴؚԜϔ ݗۆԜ֧՚ʪε0.5, 1, 3, 5 mm/sͿѺজ֨ࡈ֬ॹॢ

ĀęͿ, ؚԜϔݗ1 mm/s ۋԜۆܓæقԴəࠞÌʽԓ НۆŚ՚ՁқধսڱۋśüॠóÇՙʼČ, Ś՚Ձқۆ

ुڦə ۾޲ ݒÀʼə ìں ঝۍॠٕɰ. ۋə 200 meshĵÂԓНۆۓۙࡾşÀȃИۚ؉Ś՚ۓۙٮҼ Ś՚ۓۙÂࠞÌ՚ʪ޲ÀÇՙʼر, ǰڹ՚ʪۆؚԜϔ ݗܓæقԴʪҼŚ՚Ձқۆۓۙٮ॥ƍŚ՚Ձқۆ

ۓۙÀ ҙڮʼر ǣࢍǦ ìڷͿ ࣺɳʽɰ.

˰͆Դۋ঳֬ॹڹÁۓʪĵÂق˰͆ধսڱۋ80%

ۋԜۍܓæܼुڦÀÀۤȭڹ֬ॹܓæۆؚԜϔݗ

Ԝ֧՚ʪεČ܁(+100 mesh: 7 mm/s, 100×140 mesh:

7 mm/s, 140×200 mesh: 3 mm/s, 200 mesh: 1 mm/s) ॠČ, ࠺ͤقԺ࠘ʽࣜҵۆȭۋε100, 200, 400 mm Ϳ ܓۼॠي ֬ॹںݕॱॠٕɰ.

ۓʪĵÂۋ+100 meshۍ֬ॹقԴəࣜҵۆȭۋѺ

জق˰δࠞÌʽŚ՚ۆধսڱфुڦѺজÀػə

ìڷͿঝۍʼؽɰ(Fig. 7(a)). ۋə+100 meshقप॥

ʽ Ś՚Ձқۆ ۓۙ ࡾşÀ ؚԜϔݗۆ Ԝ֧՚ʪ 7 mm/sܓæقԴəࣜҵۆ߯ՙȭۋܓæۍ100 mmū ݓҙڮʼݓ؍Č, ҼŚ՚ՁқڹۓۙۆࡾşÀ࠶ݓʌ

͆ʪҼܼۋǰş˺ЛقࣜҵۆȭۋقԜěػۋʂҙ қ ҙڮʼş ˺Лق ǣࢍǦ ĀęͿ ࣺɳʽɰ. ъϸق

100×140 mesh ۓʪĵÂۆąڍࣜҵȭۋÀ100 mmق Դ200 mmڷͿԜ֧ʿق˰͆ࠞÌʽŚ՚ՁқۆुڦÀ

śü০ݒÀʼČ(100 mm: 49.01% G200 mm: 90.5%), 200 mmۋԜܓæقԴəࣜҵȭۋѺজق˰δŚ՚Ձ қۆुڦфধսڱѺজÀäۆػəìںঝۍॠٕɰ.

ۋ͠ॢĀęəؘԴسśॠٕˢۋŚ՚, ҼŚ՚ÂҼܼ

޲ۋٮࠞÌ՚ʪ޲قۆ३ǣࢍǦĀęͿ׆Ś՚ۓۙÀ

ؚԜڌϔق ۆ३200 mmйχūݓəԜ֧ʼݓχ 200 mm ۋԜĵÂūݓԜ֧ॠşۻقɰ֨ࠞÌʼəъϸ

ҼŚ՚ۓۙə200 mmۋԜĵÂقԴʪć՚Ԝ֧ॠي

ѕ߻ʼş˺Лق ǣࢍǦ ĀęͿ ࣺɳʽɰ.

140×200 mesh ۓʪĵÂڹࣜҵۆȭۋ200 mmۋॠ

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Fig. 7. Grade and recovery of metals with change of the height of outlet tube from the bottom (a) +100 mesh, 7 mm/s, (b) 100×140 mesh, 7 mm/s, (c) 140×200 mesh, 3 mm/s, (d) 200 mesh, 1 mm/s.

قԴࣜҵۆȭۋÀȭ؉ݙق˰͆Ś՚Ձқۆধսڱ

фुڦÀʴ֨قݒÀॠٕڷ϶, 200 mmۋԜĵÂقԴ əŚ՚ۆধսڱڹݒÀ, ुڦəÇՙॠəĀęεঝۍ ॠٕɰ. ۋə200 mmۋॠܓæقԴəŚ՚, ҼŚ՚Ձқ ۋʴъҙڮʼݓχࣜҵۆȭۋÀȭ؉ݙق˰͆Ҽܼ

ۋȭڹŚ՚ۆҙڮ͟ۋÇՙ, ҼŚ՚Ձқۆҙڮ͟ڹ

ࣜҵۆȭۋقٖॳںࡾóыݓ؍؉Ś՚Ձқۆुڦ ٮ ধսڱۋ ॥ƍ ݒÀʽ ìڷͿ ԦÁʽɰ. ̚ॢ, 200 mmۋԜĵÂقԴəࣜҵۆȭۋÀȭ؉ݙق˰͆࠺ͤ

ԜҙūݓʪɵॠəҼŚ՚ՁқۋÇՙʼرǣࢍǦìڷ ͿԦÁʽɰ. 200 meshĵÂۆąڍ, ࣜҵۆȭۋÀȭ

؉ݗս΀ Ś՚ۆ ধսڱ(100 mm: 28.9%, 400 mm:

83.1%)ۋśü০ݒÀ, ुڦəأ10% ܁ʪÇՙʼə

ìڷͿঝۍʼؽɰ. ۋ͠ॢĀęəٍԑқݕ200 mesh ܓæقԴəŚ՚ęҼŚ՚ۆࠞÌ՚ʪ޲ۋÀܶر˞Č, ۋͿۍ३ؚԜϔݗۆڮʴقۆॢ˃ÀݓՁқۆۓۙ

˞ۋʂҙқ॥ƍҙڮʼäǣࠞÌʼرьԦॢĀęͿ

ࣺɳʽɰ.

Ā΁

दPCBͿҙࢢۻşۻۙҙुںٍԑė܁ںۋڌ, қν ॠəę܁قԴьԦॢٍԑқݕڷͿҙࢢŚ՚Ձқںқ ν, Ըѻॠşڦ३ًҼܼࠞÌѪںۋڌॠي֬ॹॠٕɰ.

ٍԑқݕǴŚ՚॥͟ڹ29.8 wt%ͿܓԐʼؽڷ϶, Ś՚

ՁқںًҼܼԸѻںۋڌ३қνॠşڦ३ۓʪқśں

(+100, 100×140, 140×200, 200 mesh) ॠٕڷ϶, ؚԜ ϔݗۆԜ֧՚ʪ(0.5, 1, 3, 5, 7 mm/s) фॠҙͿҙࢢۆ

ࣜҵۆȭۋ(100, 200, 400 mm)εܓۼॠيۓʪĵÂѻ

ًҼܼࠞÌқν֬ॹں֬֨ॠيɰڼęÏڹĀ΁ں

ʪ߻ॠٕɰ.

1. ۓʪқśĀę, +100 mesh ε܃ٽॢۓʪĵÂقԴ ə ۓۙࡾşÀ ۚ؉ݗս΀ ٍԑқݕۆ ИóҼڱۋ

ݒÀॠٕڷ϶200 mesh ࡾşۆٍԑқݕۆИóҼ ڱ(45.4 wt%)ۋ Àۤ ȭó ঝۍʼؽɰ. Ś՚॥͟ۋ

Àۤ ȭڹ ۓʪĵÂڹ +100 mesh (Ś՚॥͟: 57.1 wt%)ͿܓԐʼؽɰ.

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2. ؚԜϔݗۆ Ԝ֧՚ʪÀ ݒÀ॥ق ˰͆ Ś՚Ձқۆ

ुڦəϿ˜ۓʪĵÂقԴݒÀॠٕڷǣ, 100 mesh ۓʪܓæقԴə ۓۙۆ ࡾşÀ Çՙ॥ق ˰͆ Ś՚

Ձқۆ ধսڱۋ śü০ Çՙॠə ąॳں ǣࢍǴؽ ɰ. ۓۙࡾşÀۚ؉ݗս΀ϔݗԜ֧՚ʪѺজق˰

͆Ś՚ՁқۆধսڱۋࡾóٖॳںыəìڷͿܓ Ԑʼؽɰ. ÁۓʪĵÂѻŚ՚Ձқধսڱ80% ۋԜ

ܓæقԴ Àۤ ȭڹ ुڦ(+100 mesh: 89.7%, 100

×140 mesh: 89.74%, 140×200 mesh: 75.8%, 200 mesh: 25.5%)εÍəؚԜϔݗۆ՚ʪəۓʪĵÂ ق ˰͆ ޲ۋε ǣࢍǴؽɰ (+100 mesh: 7 mm/s, 100×140 mesh: 7 mm/s, 140×200 mesh: 3 mm/s, 200 mesh: 1 mm/s).

3. +100 mesh ܓæقԴəࣜҵۆȭۋѺজق˰δŚ՚

ۆुڦфধսڱѺজəǣࢍǣݓ؍ؕڷǣ, 100 mesh ĵÂقԴəࣜҵۆȭۋÀȭ؉ݗս΀Ś՚Ձ қۆধսڱۋݒÀʿںঝۍॠٕɰ. ÁۓʪĵÂѻ

߯ʂ ुڦə 100 mm ȭۋ ܓæقԴ +100 mesh:

91.53%, 200 mesh: 35.7%, 200 mm ȭۋقԴ 100

×140 mesh: 89.7%, 140×200 mesh: 80.7%Ϳঝۍʼ ؽڷ϶, ۓۙࡾşÀۚںս΀Ś՚ۆुڦʪÇՙ॥

ں؎սەؽɰ. ۋəŚ՚ęҼŚ՚ՁқۓۙۆࠞÌ

՚ʪ޲ۋÀÇՙʼر ьԦʽĀęͿࣺɳʽɰ.

ԐԐ

ٍ҆ĵə2010țʪݓ֩ą܃ҙۆۦڙڷͿॢĶقȃ ݓşցथÀڙ(KETEP)ۆݓڙںы؉սॱॢٍĵę܃

ۓɦɰ (No. 20105010006B).

3FGFSFODFT

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