Họrọ asụsụ:
A.Gupta, K. Flynn na F. Hrach
ST Equipment & Technology, 101 Hampton Avenue, Needham, MA 02494, USA
Abstract
ST Equipment & Technology (STET) bụ Mmepụta na emeputa nke triboelectrostatic belt nkewa usoro na-enye mineral ụlọ ọrụ a ngwọta beneficiate ezi ịnweta ores site na iji a akọrọ technology. The triboelectrostatic belt nkewa technology e ji mee commercially ikewapụ a dịgasị iche iche nke minerals tinyere calcite / quartz, talc / magnesite, barite / quartz, na aluminosilicates / carbon na ada uyi. The elu arụmọrụ multi-ala nkewa na-enweta site urughuru na urughuru odori arụpụta elu nkewa dị ka tụnyere a ot free-ọdịda triboelectrostatic separator. Ọ bụ a akọrọ technology na-adịghị achọ iji environmentally mwute Chemicals na mmiri, n'ihi ya ọ dịghị n'efu na mmiri ọgwụ usoro na-chọrọ na usoro. Na a akụkọ, ihe a nke ọma pilot osisi ọnụ ọgụgụ beneficiation ule mụụrụ na a ngwakọta nke zircon / rutile na ịnweta ájá na-ebipụta.
Keywords: minerals, akọrọ nkewa, triboelectrostatic Nchaji, belt separator, ịnweta ájá, zircon, rutile
Okwu Mmalite
STET triboelectrostatic separator utilizes iche dị na elu onwu n'etiti ahụ nke na ndepụta ihe ike eletriki ụgwọ iche. Mgbe abụọ dissimilar ebupụta na-ụlọ akwụkwọ ji agwụ megide onye ọ bụla ọzọ, ụgwọ nyefe-ewe ebe na ihe onwunwe na ala elektrọn mmekọrita adịkwa electrons nke ihe onwunwe na elu elektrọn mmekọrita otú odori nti na na-ezighị ezi karị.
Na STET triboelectrostatic belt separator, ndepụta na ihe onwunwe na-nri n'ime a mkpa ọdịiche n'etiti abụọ yiri electrodes. E nwere onye na-emeghe-ntupu belt akpụ akpụ n'etiti electrodes na elu ike ọsọ, upto 65 ụkwụ / sec, akpụ a loop gburugburu a set nke rollers na ma nsọtụ (Ọgụgụ 1). The ahụ na-triboelectrically boro ebubo site ume urughuru na urughuru na kọntaktị ma na-dọtara na-oppositely ụgwọ electrodes. The belt sweeps ndị electrodes na-eburu dị iche iche ahụ na-abụghị nsọtụ nke separator. The counter ugbu a eruba nke nkewa urughuru ịnọgide triboelectric Nchaji site urughuru na urughuru collisions enye maka a multi-ogbo akọrọ beneficiation usoro. The separator imewe bụ dịtụ mfe na kọmpat. The n'ozuzu ogologo bụ approx. 30 ft (9 m) na obosara 5 ft (1.5 m) maka a full size azụmahịa unit.
STET ekwusi a nnyocha na mmepe ime nnyocha na STET technical center na Needham, Massachusetts. Nke a owuwu agụnye STET pilot osisi na onwu laabu, nakwa dị ka imewe, n'ichepụta na oru nkwado ngalaba maka STET azụmahịa mmepe na n'ichepụta ụlọ ọrụ. The pilot osisi ụlọ abụọ belatara ọnụ ọgụgụ, STET separators tinyere ancillary ngwá eji ichoputa mgbanwe nke STET usoro na inwale nkewa nke ada uyi na mineral na nwa akwukwo na isi mmalite.
Ọgụgụ 1: STET triboelectrostatic separator schematic
ịnweta ájá
The mineralogy nke rutile ajụ sample ahụ bụ ihe dị 41% rutile, 33% zircon, 18% ilmenite na 8% ọzọ minerals. Nzube ya bụ ime ka nhazi na ọnọdụ na-agbake zircon si rutile ajụ sample. STET ekenịmde chemical analysis iji wavelength dispersive X-Ray fluorescence (WD-XRF) nri sample na-arụpụta (normalized maka LOI) na-egosi na table 1.
Isiokwu 1: Elemental analysis nke ịnweta ájá sample (isi mmiri gosiri)
Ot ụzọ beneficiating ịnweta ájá abuana mgbagwoju anya eruba Ibé akwụkwọ iji Filiks dị ka mmiri ndọda usoro, magnetik nkewa na froth flotation (Onye na-egbu egwuregwu. 1,2) nke ha na-agaghị emeli. The magnetik nkewa usoro akpatakarị a middling nta nke na-achọ ma mkpofu ma ọ bụ imegharị ihe maka iji azụ ndepụta stream. Magnetik nkewa iji rollers nwere ndị ọzọ na-agaghị emeli na nhazi Iwu. The iwu ahụ, ọbụna ndị na-abụghị magnetik agbasaghị etolite coatings na ala, ejere nkewa usoro adighi ike. STET separator na-ọma ruru eru maka nkewa nke nnọọ mma ihe na nnọọ elu throughputs. Wet ike ndọda na froth flotation Filiks na-agụnye arọ mmiri chemical na mmiri ojiji, ma na-achọ n'efu na mmiri ọgwụ usoro. Akọrọ ikpeazụ ngwa, a ihicha nzọụkwụ nke na-kwukwara downstream nke beneficiation nzọụkwụ si otú amụba ọrụ na-akwụ ụgwọ.
STET si triboelectrostatic technology na-enye a pụrụ iche ike hazie ndepụta akọrọ, na ala ọkụ eletrik na oriri, a approx. 1 kWh / ton (Onye na-egbu egwuregwu. 3) na site abụọ kwalite iyi na ma ọgwụgwụ nke separator na-enweghị middling nta.
Results
STET gosiri ihe àmà nke irè Nchaji na nkewa nke zircon na rutile ịnweta ahụ. A hụrụ na doping ndepụta ore na obere obere nke aromatic ma ọ bụ aliphatic carboxylic asịd (electrostatic ụgwọ oyi mmadụ) gosiri dị ịrịba ama mma na nkewa omume. Ọgụgụ 2 n'okpuru na-egosi na ngwaahịa ọkwa (ZrO2 content tụrụ iji WD-XRF) na ZrO2 mgbake na ngwaahịa maka niile na-agbaba mụụrụ na STET pilot osisi. Ọ nwere ike na-hụrụ na n'okpuru kachasị ọnọdụ na oriri doped na aromatic carboxylic acid na 2000 GM / ton onunu ogwu na mmiri, ngwaahịa akara ule nke >50% ZrO2 ọdịnaya na >50% ZrO2 mgbake na ngwaahịa na-enweta (ahụ pụta ìhè data). Nkezi ZrO2 ọdịnaya n'ihi na ndepụta bụ approx. 30%.
Ọgụgụ 3 na-egosi site na-ngwaahịa ọkwa (TiO2 content tụrụ iji WD-XRF) na TiO2 mgbake ka site-ngwaahịa maka niile na-agbaba mụụrụ na STET pilot osisi. Ọ nwere ike na-hụrụ na n'okpuru kachasị ọnọdụ na oriri doped na aromatic carboxylic acid na mmiri, site-ngwaahịa akara ule nke >50% TiO2 ọdịnaya na >80% TiO2 mgbake ka site-ngwaahịa na-enweta (ahụ data pụta ìhè). Nkezi TiO2 ọdịnaya n'ihi na ndepụta bụ approx. 40%.
Isiokwu 2 n'okpuru na-egosi nsonaazụ ahụ si agbaba ekenịmde n'okpuru kachasị ọnọdụ. STET bụ ike nweta >50% ZrO2 ọdịnaya ngwaahịa na mma zircon content beneficiating a oriri na nkezi 30% ZrO2 ọdịnaya. The rutile nta nke na ndepụta e anakọtara dị ka site-ngwaahịa, na >50% TiO2 content beneficiating a oriri na nkezi TiO2 content approx. 40%. Future ọrụ ga-elekwasị anya optimizing nkewa pụta site na mbenata na onunu ogwu nke ụgwọ oyi mmadụ.
Ọgụgụ 2: Product ọkwa (ZrO2 ọdịnaya) v / s mgbake (otu ngafe pụta)
Ọgụgụ 3: Site-ngwaahịa ọkwa (TiO2 ọdịnaya) v / s mgbake (otu ngafe pụta)
Isiokwu 2: Results enweta n'okpuru ezigbo nhazi parameters eji "rutile ajụ" oriri
mmechi
Ọ na-ọma gosiri na STET triboelectrostatic belt separator bụ ike nke na ihe n'ụzọ dị irè beneficiating na zircon / rutile ngwakọta nwere ịnweta ájá na-eri nri, si otú ọbọ kwalite zircon na rutile ọdịnaya ngwaahịa na site-ngwaahịa karị. Nke a na Usoro na-enye a na-eri-irè, viable ọzọ na nwere ike omume kpochapụ mmiri nhazi usoro. Ọ dịghị achọ ka ojiji nke environmentally mwute kemịkal ma ọ bụ na mmiri na otú na-adịghị achọ ihicha nke ikpeazụ ihe. The oriri ike maka STET separator bụ ala, approx. 1 kWh / ton nke esichara oriri ihe.
References
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