AP229A - Rotary centrifugal separator (heavy medium) - Google Patents

Abstract

A centrifugal separator comprising a bowl from which the peripheral wall is provided with numerous holes, equally staggered and tangentially entering the bowl. The bowl is surrounded by a water jacket which is mounted on a hollow shaft. A hopper is installed above the centrifugal bowl with a feeder line axially located and ending at the bottom. The bowl is provided with axial spaced rings which are fixed to the peripheral wall. The interior diameters of the rings increase from the bottom to the top. A process for separating materials from a liquid in which the liquid is added into the hopper, flows down through the feeder line into the bowl and flows up and out of the top. The materials are separated through centrifugal force created by rotating the bowl with the surrounded water jacket. Air is fed into the water jacket and is forced into the bowl through the holes provided in its wall and creates a centrifugating fluidized bed. The bowl and water jacket are rotated by driving on the hollow shaft through which the end air is fed to the water jacket. The separated materials are recovered by flushing the rotating bowl, stopping the rotation and replacing the air input by clean water which is forced into the bowl through the holes in its wall. It rinses the separated materials from the rings and flows out of the bowl through a drain located in the bottom. The apparatus is suitable for winning a gold, silver or platinum from a slurry.

Description

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CENTRIFUGAL SEPARATOR andxts use AP000229

The invention concerns a centrifugal separator and its use inthe separation of heavier materials from a liquid, such as gold,platinum, silver etc. from a slurry.

The separation of heavier materials from a liquid by means ofcentrifugal force is well known. The present invention improvesthe efficiency of the separation by creating a fluidized bed inthe centrifuge and by a specific construction of the centrifugalseparator .

The centrifugal separator subject of this invention comprises acentrifugal bowl, a number of axially spaced rings, fixed to theperipheral wall of the bowl, and a series of equally spacedholes in the peripheral wall, extending into a surrounding waterjacket.

The centrifugal bowl and the surrounding water jacket arerotated. Air or another gas is fed to the water jacket andforced into the centrifugal bowl through the numerous holes inthe peripheral wall. This creates a rotating fluidized bed inthe centrifugal bowl, by which the heavier materials areseparated from the slurry. The slurry is introduced axially atthe bottom of the bowl and after separation of the heaviermaterials flows out of the top of the bowl.

Preferably the unit rotates on a hollow shaft with a rotaryseat affixed on the bottom, through which air or other fluid isfed to the water jacket. The holes in the peripheral wall areconstructed in such a way that the air is forced into the bowltangentially and contrary to the direction of the rotation ofthe unit. The Slurry is fed to the unit through a feeding hopperat the top of the unit and enters the separator separator itselfat the bottom through a feeder pipe situated axially in the bowland ending at its bottom. The slurry from which the heaviermaterials have been separated flows out of the top opening ofthe rotating unit and leaves through a tangential launder.

To recover the separated heavy materials the slurry input is stopped and the slurry is flushed out of the separator After all slurry waste has been flushed out the rotation xs s topped and the air inpu t to the water jacket is replaced by c 1 ('an J L C 1 · The water is fore ed to enter the centrifugal '0 owl thro * ·>? ιΊθ] e s n t h e pc r iph e r a 1 wall and rinsed off th·· sc p a r a t e d h«?;r; i cr ma i erial s from the axially spaced rings i.s tne ina . 11? a vc a togetscr w 1c n t π c separated ma tennis, the sepa m r:>1: throngh a drain 1 o c a t e d i n she bottom of the bowi. The cen Ci. ~ *_ Li cl 3. JCpQitllcf an d its use _ η L: ic ccpa l -u c : : η n heiv:er mate r ml from a s lurry will n ow bo described 0 a a The dr a wings nos . i to 4 .

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Claims (2)

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   1. A centrifugal separator comprising a cc n t r r: uga ·which the peripheral wall ;s provided wita rn.mercur ho: ntrocucing air or another f 1 jid into the bowl. c e i; i.or : A certrl f a g a 1 h tor according tondad by a wator ;oerne air or anot.ne
2. 3 . Λ c e η t r i t a a a 1 a c p a r a t o r a c c o r d i a g ita iioopei is o a a t a . 1 e a arete toe c e 11t i a 1 a glocated axially .n the centritagal. bowl a i ah n , -i . he inn \ centrιia c soρa i a ο o r accor d iag t carofagal o cwd :a arav.ae.i ..ath a:·:;.:o the ner.nhicro: waj ί and whic.'i inn ·'· i ΕΊ < j 2 2 O i’ll 111_' O . 2 71 _ t *2 1,. 2 t 2' p . i Of ti 1.-:2

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   j 2 21 C 2‘ 7. 2 2 2 2 2. 2 2 2 2 2 2 2 '2 l_j u. 7 2 Ω 2 2 . 2 2 ·2 2 2 C J 0*2 2 ^2 11 i 2 •'eici.'. Jidtej and _aprove·2 .72 jcp-jralLon of J22 ’2 2 2 222 L" 20 122222. / . 7 2 2 7< 2i 2 A process .according to claim 6 an which tare rotated by driving c-n the nolle·.·; aha jacket and howl ar_ rount-.d. /2 e e £ : i 1 '2 2i 2 2 C2 2 2. 2 . ... <2 . BAD ORIGINAL Ί ΑΡ Ο Ο Ο 2 2 9 · Λ proc.e^ ror recovery heavier ia J r .epar a d iron; a liquid .leccrirrsij co claims 6 and ? m which the rotatinc: Jew! :L.Lrled witl. clean lice id, the rotation m stopped cid de j. ./rtrh ill re: - iced by deeding clean niter to tee wafer ' it let ...- - i. 'J i 'ju i;. ,;Ίt? ?.·o!.< J. tz3i*o jcjίi _ .c Γιu7’c i'cuis no a Co 1 Γ. } _ . r i r. j e i;e j I TLt_ i'i c .1 ?;n ' Ο Γ t.ZC WL.’UUnc L pL'CCLOUdatii'.um, tron. n tier re byrecess according to claims Dated this 15 Day of July 1991. * * * geld, eilver tr --ever a ter er a e: a t e r iirg ato " 9 .

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