The core principle of a water-jacketed centrifugal concentrator (Nelson centrifuge) is to achieve efficient separation of high-density fine minerals (such as gold) from low-density gangue by using backwash water to form a dynamic fluidized bed in a strong centrifugal force field.
I. Core Structure (Cov Ntsiab Lus Tseem Ceeb)
Muab ob npaug rau- txheej nruas (core):
Pem hauv ntej: Lub khob hliav qab stainless hlau nrog annular spacers, nws cov phab ntsa densely perforated los ua enrichment tso tsheb hlau luam.
Txheej txheej: Ua ib lub tsho dej kaw nrog cov txheej sab hauv, siv rau kev faib dej rov qab.
Hollow lub ntsiab ncej: Cov dej siab nkag mus rau hauv lub tsho dej los ntawm cov ncej no thiab tom qab ntawd tawm ntawm qhov me me hauv txheej sab hauv.
Tsav lub cev: Lub cev muaj zog tsav lub nruas kom tig ntawm kev kub ceev (150-500 rpm), tsim lub zog centrifugal ntawm 60-100g.
II. Txheej Txheem Ua Haujlwm (Kev piav qhia txog plaub kauj ruam)
Pub thiab Centrifugal Settling
Lub slurry yog pub rau hauv qab ntawm lub nruas los ntawm qhov chaw. Nyob rau hauv qhov kev txiav txim ntawm lub zog centrifugal muaj zog, cov slurry ntws mus rau pem hauv ntej ntawm lub khob hliav qab phab ntsa. High- cov khoom ntom ntom (xws li kub) raug rau lub zog radial ntau dua, nrawm nrawm rau ntawm phab ntsa sab hauv thiab muab tso rau hauv lub voj voog annular spacer trough; low-density gangue txav mus los nrog cov dej ntws.
Backwash Dej thiab Fluidization (theem tseem ceeb)
Cov dej siab (0.03-0.06 MPa) nkag mus rau hauv lub tsho dej los ntawm lub hollow ncej thiab ejected upwards ntawm lub puab pores, ua ib tug backwash upward flow opposite rau lub centrifugal quab yuam.
Lub backwash dej fluidizes cov pob zeb hauv av nyob rau hauv lub spacers, tsim ib tug dynamic cais txaj.
High-density minerals: Centrifugal force >>dej ntws tsis kam → nyob ruaj khov nyob rau hauv qab ntawm lub trough.
Tsawg-density gangue: centrifugal quab yuam < dej ntws tsis kam → tsis tu ncua ntws mus.
Kev sib cais tsis tu ncua thiab tailings tso tawm
Lub teeb pob zeb hla dhau los ntawm sab saum toj ntawm lub nruas nrog cov dej nce siab thiab nkag mus rau hauv cov tailings trough; cov ntxhia hnyav tsis tu ncua sib sau ua ke thiab txav mus rau hauv lub spacers, tsim ib txheej concentrate.
Concentrate Discharge (Intermittent/Automatic)
Tom qab lub sijhawm ua haujlwm, nres lub tshuab lossis hloov cov dej ntws tawm kom tshem tawm cov pob zeb hnyav hnyav (concentrate) hauv cov diaphragm uas siv siab - dej siab.
III. Principple and Essence (Summarized in one kab lus)
Lub zog centrifugal ua kom pom qhov sib txawv ntawm qhov sib txawv, thiab cov dej rov qab dynamically ntsuam xyuas cov khoom; Cov zaub mov hnyav "tso thiab sib sau hauv qab," thaum lub teeb cov zaub mov "ntev thiab tawm," ua kom tau txais txiaj ntsig zoo ntawm cov khoom zoo.
