Lub hauv paus ntsiab lus tseem ceeb ntawm alluvial tin ore beneficiation yog siv qhov sib txawv ntawm qhov sib txawv ntawm cassiterite (SnO2) thiab gangue (xws li quartz, feldspar, thiab av nplaum). Cassiterite muaj qhov sib nqus tshwj xeeb ntawm kwv yees li 6.8-7.0, thaum cov gangue ib txwm muaj qhov tshwj xeeb ntawm tsuas yog 2.6-2.8.
Txij li cov pob zeb tin ore feem ntau tau dhau los ntawm huab cua huab cua thiab kev thauj mus los, ua rau muaj cov ntxhia zoo li kev ywj pheej, kev sib cais ntawm lub ntiajteb txawj nqus yog cov txheej txheem tseem ceeb, tus yam ntxwv ntawm tus nqi qis, tsis muaj kuab paug, thiab cov nqi rov qab siab.
Cov hauv qab no yog cov txheej txheem ua tiav, cov khoom siv tseem ceeb, thiab cov ntsiab lus ua haujlwm rau alluvial tin ore beneficiation:
I. Core Process Flow Diagram The standard alluvial tin ore beneficiation process typically follows the path of "washing and desliming -> screening and classification -> roughing and tailings removal ->zoo particle rov qab".
II. Cov kauj ruam ntxaws thiab cov cuab yeej teeb tsa
1. Scrubbing & Desliming - Qhov tseem ceeb tshaj plaws thawj kauj ruam
Qhov chaw tin ore feem ntau muaj cov av nplaum ntau. Yog tias tsis tau ntxuav, cov av nplaum yuav coated cov cassiterite los yog txhaws cov khoom, ua rau txo qis ntawm qhov rov qab zoo.
Lub hom phiaj: Txhawm rau tawg cov av nplaum, tshem cov av nkos (-0.037mm), thiab tiv thaiv "sludge cuam tshuam."
Khoom siv:
* Trommel Scrubber: Feem ntau siv, sib xyaw txhuam, crushing, thiab tshuaj ntsuam.
* Log Washer: Haum rau cov kua nplaum uas muaj kuab heev.
* Hydrocyclone: Siv rau kev nplua desliming.
Lus Cim: Cov dej ntws tawm (sludge) tsim thaum lub sij hawm ntxuav ore tsis tuaj yeem tawm ncaj qha thiab yuav tsum tau kho nyias kom rov qab tau cov khoom zoo.
2. Kev tshuaj ntsuam & kev faib tawm
Cov khoom raug cais raws li qhov loj me, raws li qhov sib txawv ntawm qhov sib txawv ntawm cassiterite xav tau cov khoom sib txawv ntawm lub ntiajteb txawj nqus sib cais kom ua tiav cov txiaj ntsig zoo.
Grading boundaries: Generally divided into coarse (>2mm), nruab nrab (0.5-2mm), nplua (0.03-0.5mm), thiab ultrafine (<0.03mm).
Khoom siv:
Vibrating npo: siv rau kev muab qhab nia ntxhib.
High -frequency screen: siv rau kev muab qhab nia zoo.
Classifier box: siv cov dej ntws nrawm rau kev ntsuas.
3. Roughing – Loj - nplai tailings pov tseg
Lub hom phiaj yog muab pov tseg ntau dua 90% ntawm lub teeb pov tseg pob zeb, tau txais qib qis -qib ntxhib concentrate, txo qis cov khoom ntim tom qab.
Cov khoom siv nyiam: Kauv chute.
Qhov zoo: Cov khoom siv hluav taws xob ntau, tsis siv hluav taws xob, tus nqi qis, kev saib xyuas yooj yim.
Muaj feem xyuam rau: 0.03-2mm particle loj.
Lwm yam khoom siv: Jig tshuab.
Advantages: Excellent recovery effect for coarse cassiterite (>2mm), muaj zog tiv thaiv kev hloov pauv.
Daim ntawv thov: Coarse-grained los yog ntxiv rau kauv sluices.
4. Kev Tu - Txhim Kho Qib: Ntxiv purifying cov ntxhib ntxhib los mos kom tshem tawm intergrowths thiab impurity minerals (xws li ilmenite, zircon, thiab lwm yam).
Khoom siv: Shaking Table (Wilfley Table): Kev sib cais siab tshaj plaws, yielding siab -qib concentrate, tab sis nrog me me throughput. Feem ntau yog siv los ua cov ntsiab lus ntxhib los ntawm cov kav dej.
Me Kauv Sluices: Siv rau reprocessing intermediate khoom.
Tswvyim: Feem ntau ntiav "ntau-theem tu," nrog rau qhov nruab nrab rov qab rau kev rov ua dua.
5. Fine Slime Treatment – Overcoming a Challenge: Sludge (<0.03mm) produced during washing and classification often contains large amounts of fine cassiterite, which traditional sluices and shaking tables recover very little from. This is crucial for improving the overall recovery rate.
Cov Khoom Siv Core: Centrifugal Concentrator. Qauv: Knelson, Falcon, los yog domestic centrifugal separator.
Lub hauv paus ntsiab lus: Tsim kom muaj lub zog centrifugal nrog lub zog ntau ntau kaum zaus ntau dua lub ntiajteb txawj nqus, yuam cov sedimentation ntawm nplua - cov pob zeb hnyav hnyav.
Cov txiaj ntsig: Ua kom cov nyiaj rov qab tau zoo dua - cov nplej zom los ntawm cov tsoos 30% mus rau ntau dua 80%.
Cov Khoom Pab Txhawb: Inclined phaj thickener, sib nqus sib nqus (yog tias muaj ntau cov hlau impurities).
III. Cov txheej txheem sib xyaw ua ke
Raws li qhov ntsuas mine thiab ore khoom, peb qhov kev sib txuas hauv qab no tau pom zoo:
Scheme A: Tus qauv loj-scale tau txais txiaj ntsig cog (pom zoo, tus nqi rov qab siab tshaj)
Flow: Washer -> Vibrating screen -> Spiral sluice (roughing) -> Jig (scavenging) ->Txau lub rooj (tu) + Centrifuge (rau kev kho slime).
Nta: Tag nrho cov particle loj npog, tag nrho cov nyiaj rov qab tuaj yeem ncav cuag 75% -85%.
Muaj feem xyuam rau: Cov mines tsis tu ncua nrog cov peev txheej ntau dua 1 lab tons thiab qib ntawm 0.1% -0.5%.
Kev xaiv B: Me me mus rau nruab nrab-Size Simple Beneficiation Plant (Kev nqis peev qis)
Process: Rotary drum screen (with washing function) -> Spiral chute assembly ->Yooj yim co rooj.
Nta: Cov khoom siv tsawg dua, kev tsim kho vaj tse sai, tab sis poob siab ntawm cov khoom zoo; rov qab tus nqi kwv yees li 60% -70%.
Tsim nyog rau: me me - nplai ntiag tug mining lossis pilot ntau lawm thaum lub sij hawm tshawb nrhiav.
IV. Yam Tseem Ceeb Ua Tau Zoo thiab Kev Ceeb Toom
"Thaum ntxov thiab ntau dua rov qab" Txoj Cai: Cassiterite yog nkig thiab yooj yim dua - crushed. Txo cov crushing thaum sib tsoo (yog tias tsim nyog) thiab kev thauj mus los. Rau placer ore, zam tsis tsim nyog crushing; ntxuav thiab tshuaj ntsuam qhov twg ua tau.
Slime: Yeeb ncuab thiab phooj ywg: Ntau dhau slime deteriorates lub ntiajteb txawj nqus sib cais ib puag ncig (nce viscosity) thiab yuav tsum tau muab tshem tawm ua ntej.
Txawm li cas los xij, cov slime tshem tawm yog nplua nuj nyob rau hauv nplua tin thiab yuav tsum tsis txhob tso tawm ncaj qha; nws yuav tsum tau rov qab cais siv lub centrifuge.
Kev Tswj Dej: Kev sib cais ntawm lub ntiajteb txawj nqus yuav tsum muaj dej ntau. Yuav tsum tau tsim kom muaj lub tshuab dej rov ua dua tshiab (thickener + rov qab dej tank), uas yog ob qho tib si ib puag ncig thiab txo cov nqi dej.
Associated Mineral Recovery: Placer tin ore feem ntau muaj txuam nrog tungsten, titanium, zirconium, monazite, thiab lwm yam. Tom qab cov tin concentrate tau muab rho tawm, cov tailings lossis middlings tuaj yeem rov qab tau ntxiv los ntawm kev sib nqus sib nqus (siab- sib nqus sib nqus ntawm titanium / tungsten cais) thiab paration electrostatic. tsis yog-cov neeg coj ua), nce nyiaj txiag txiaj ntsig. Kev Ntsuas Kev Pab Cuam Ua Ntej: Ua ntej yuav khoom, nws yog ib qho tseem ceeb uas yuav tsum tau coj cov qauv ore (nrog rau cov txheej hauv av ntawm qhov sib txawv) rau kev ntsuam xyuas tau txais txiaj ntsig. Txiav txim siab qhov loj me me ntawm cov cassiterite (nws puas yog feem ntau ntxhib los yog cov khoom zoo?), uas yuav ncaj qha txiav txim siab seb koj puas xav yuav ntau cov sluices lossis centrifuges.
V. Summary and Recommendations: Rau placer cassiterite beneficiation:
Cov Khoom Siv Tseem Ceeb: Kauv sluice (siab muaj peev xwm, tus nqi qis).
Cov Khoom Siv Precision: Tuav lub rooj (purification).
Cov Khoom Siv Hluav Taws Xob: Centrifugal concentrator (rov qab cov khoom zoo, tseem ceeb heev rau txoj haujlwm ciaj sia).
Pretreatment: Lub tshuab ntxhua khaub ncaws (yuav tsum ua kom huv si).
Yog tias koj cov ore qib siab tshaj 0.2 kg / m³ (200 g / m³) thiab cov ntsiab lus av nplaum yog nruab nrab, siv cov saum toj no ua ke ntawm "ntxuav + kauv sluice + co rooj + centrifuge" feem ntau yuav rov qab tau cov cuab yeej peev hauv 6-12 lub hlis.
