Can gravity separation be used to process ultra-fine slimes?

Traditional gravity equipment like jigs and spirals lose efficiency below 74 microns (200 mesh) because the surface drag forces of water overcome gravity. However, advanced Centrifugal Gravity Concentrators spin the slurry to generate forces up to 60G or more, allowing efficient recovery of heavy minerals down to 10 microns.

Can gravity separation replace flotation completely?

Only if the Concentration Criterion is high enough. For complex, finely disseminated sulfide ores where valuable minerals are tightly bound to gangue at microscopic sizes, flotation remains mandatory. However, modern plants frequently use a hybrid circuit: gravity separation to recover coarse minerals early, followed by flotation to scavenge the ultra-fine remnants.

What are the primary factors that affect the efficiency of gravity separation?

The efficiency of gravity separation depends on three critical parameters: the specific gravity difference between the target mineral and gangue (a larger difference ensures easier separation), the feed particle size distribution (strict classification prevents overlapping stratification), ? fluid dynamics, including water flow velocity and slurry density control on the equipment surface.

Why is gravity separation highly recommended for small to medium-scale eco-friendly mines?

????? ??????? ????? is a purely physical beneficiation method that requires zero chemical reagents. This completely eliminates the need for expensive chemical inputs, avoids environmental tailing contamination, lowers overall operational costs (Opex), ? ensures quick investment recovery by catching coarse free-milling minerals instantly.

????? ??????? ??? ?????: ???????, ?????, ?????

???? : 麻豆社 Time: 8 ?????, 2026 ?????? ??????:

Summary: ????? ???? ?????? ??????? ??? ?????? ?????? ???????. ??? ?? ?????? ????? ?????? ?????? ???? ?? ??????? ??????? ??????? ???, ?'???? ????????....

??? ???? ?????? ??????? ??? ???????

????? ??????? ????? ????????? (????? ?? ????? ?????) ??? ??? ??????????? ???????? ???????? ????? ?????? ???????. ??? ????? ??? ???? ??????? ??????, ?????? ?????? ???????? ???????, ???, ??? ???? ???????? ????? ?????. ?????????? ??? ????? ????? ???????, ?????-?????? ???????????? ??????.

?????? ???? ?????

?? ????? ?? ???????? ???????? ??????? ??? ???? ???? ??? ???????? ?? ???? ????? ????? ????????? ???????? (??????) ??? ??? ?????? ???? ????? ?? ????, ??? ????? ????, ?????? ?? ?????? ???? ???? ??????.

?????? ????? ????? ?????? ????????? ????? ????? ????: ??????? ????? ???? ?????? ????? ?????? ???????, ???? ?????? ???? ??????? ?????? ??? ?? ????? ?? ???? ??????. ????? ????? ???? ???? ?? ????? ???? ??? ?????.

???? ???? ???? ??????? ????

????? ????: >25 ?"? (????? ???? ???????, ?????? ?????)
???? ???????: 2–25 mm (conventional jig, spiral chute)
???? ?????: 0.1–2 mm (shaking table, spiral concentrator)
Slime: ???? ?-0.1 ?"? (?????? ????? ?????, ???? ??? ?????? ?? ?????? ????? ????????????)

????? ??????? ?????? ????

?? ??? ?????? ?????? ???? ?????? ?????? ??? ?????, ?? ?????? ?? ?????? ?????:

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???? ?????? ????	???? ????? ???? ??????? ??????? ???????? ??? ???????? ??????? ???? (??? ??????). ???? ???? ???? ??????? ????? ?? separates ????? ????? ???? ???? ????.
?????	?????? ?????? ?????? ????? (??????) ??????? ?????? ??????? ????? ??????. ???? ???????? ???? ????? ??? ????? ??? ???????? ?????? ???? ????? ???? ???? ?? ????? ???? ?????.
???? ???? ?????? ?? ???????	????? ?? ??? ????? ??? ?????? ????? ?????? ????? ?????? ????? ???????, ?? ??????? ??? ????? (???? >0.1 ?"? ?? 25 ?"?). ??? ????? ????? ????? ??? ???????? ???? ???? (??????, <0.1 ?"?) ??? ???? ?????? ???? ???? ????? ????? ????.

????? ????? ??????? ??? ?????? ?????? ????? ???

?????? ???? ?????? ?????????? ???? ??? ???? ????? ????? ???????: ????, ???? (?????), ? ????? ?????.

??? ?????

????? ?? ??? ????? ??? ????? ?? Mineral to maximize the efficiency of the separation process. ???? ?????? ??????:

????? ??????: ????? ???? ??? ?????? ????? ????? ?? ???????? ??????? ??????. ???? ?????? ????????? ???? ??????? ???? ?????? ?????? ?? ???????? ?????.
????? ????? ?? ????????: ?? ?????? ??????? ???? ?????? ?? ?????? ?? ?????? ???????????, ?????? ????? ????? ??????? ???? ???, ??????? ?????? ?????? ??????. ?????? ?????? ?? ???? ????????? ?? ??? ?????.
????? ??????: ??? ???? ?? ????? ??????? ?????? ?????? ???? ????? (????, ??, ??????, ??) ??????? ????? ?? ????? ????????. ?? ????? ????? ????? ???? ?? ????? ????? ?????????? ??? ???? ???? ??????.

??? ??????

?? ???? ?????? ??? ?????? ?????? ??????? ?? ??????? ???? ??? ??????? ????? ?????? ???. ????? ???? ??? ????? ?? ???? ?????? ??????? ??? ??????, ???? ?'????, ??????? ???, ??????? ?? ??????? ?????????????.

?????? ??????:

???? ????: ???? ????? ??? ???? ???? ????? ?????, ????? ?????? ??????? ???? ??? ?????? ????? (??????, ????? ???? ?'??) ???? ?????.
???? ?????: For ores with unevenly disseminated valuable minerals, a multi-stage “stage separation” process is often used. This involves:
- Roughing: ???? ?????? ?????? ??? ???? ???????
- Cleaning: ????? ???? ????? ?? ?????? ???? ???.
- Scavenging: ???? ????? ??? ????? ?? ???????? ??????? ?????? ??????? ??????.

??? ?????? ???? ????? ???????

??? ?? ???? ?????? ??????? ??????? (????? ??????).

????? ?????? ?????? ?????
????? ??/?????? ???? ?? ????? ??? ???? ?? ????? ????; ????? ????? ???? ????? ????? ???? ?????. ?????? ????? ???? ?????, ?? ???? ????? ?????.

????? ????? ???????
????? ????? ??? ????? ?????? ?????? ??????? ?????? ????? ????? ??????; ????? ????? ??? ?????? ???? ?????? ????? ?? ?????? ??????? ?????? ????? ????? ??? ????? ??????? ?????????.

???? ????? ????? ??????? ?????

?????? ?? ???? ?????? ?? ????? ?????? ?? ??????, ????? ?????? ??????? ????? ?????? ????? ??????? ????????? ?????, ??????? ????, ????? ??????? ???? ????, ?'?????, ???? ?????, ??????, ????? ???????????, ????? ????? ??????. ???? ???, ?????? ??????? ???? ????, ?'?????, ???? ????? ??????? ?? ???? ??????????? ??????? ????? ?????? ??????? ?????????.

????? ???? ??????? (HMS) / ????? ??????? ???? (DMS)

????? ????-????? ??? ???? ????? ????? ??????? ????? ???? ?? ?????? ???????? ?????? ??? ???????? ??? ???????? ??? ?????? ??????.

??????: ???? ??????? ????? ???? ?????? ?????? ????? (???? ??? ??? ????????? ?? ??? ????? ???? ?? ??????). ???? ??? ???? (????) ?? ???? ??? ?? ??? ????, ???? ?????? ????? ???? ???? ??????.

???? ?????? ????: ?????? ???? ?? ??????? ?????? (????? ???, ????? ???????, ?????? ???? ????? ???? ????? ????? ????? ??? ????? ?????? ????? - CapEx).

????? ??? (??????)

?'????? ??? ????? ????? ?????? ??????? ???? ???????? ????? ???? ???? ???? ????? ?????.

??????: ????? ???? ???? ?? ??? ????? ???? ????? ????? ?? ??? ????? ??????? ?????? ???? ???? ??? ?????. ????? ????? ?? ???? ????? ?? ???? ???????? (???????), ?????? ????? ????? ???????? ???????. ??????? ????? ???????? ??? ???? ???????? ????? ???????, ???? ???????? ???? ?????? ????? ??????? ???.

???? ?????? ????: ?????? ??????? ???? ?? ???????? (?????? ????? ?? 10 ?"? ?? 0.5 ?"?), ??????? ???? ??? ?????? ????, ????, ??? ???????.

???? ????? ???????

????? ???? (?? ????? ???????) ??? ???? ????? ????? ????? ?????? ????? ????? ?????? ?? ???? ?????? ???? ???????? ????? ?????.

??????: ???? ??? ??? ????? ?? ??? ???? ?????? ????? ???? ????? ????? ???? ????. ???????? ???? ??????? ?????? ?????? ???? ??????? (??????) ???????? ?????? ?? ??? ????? ???? ?? ???? ????????. ???????? ??????? ?? ????? ?????? ?????? ???? ??????? ?? ??? ???? ?? ????? ?????? ??????.

???? ?????? ????: ?????? ?????? (?? 0.5 ?"? ??? 0.037 ?"?). ?? ???? ??? ????? ???? ???? ????, ?? ????? ???? ??????? ????????? ?????? ??????? ?????? ?????? ?????? ??????? ?????? ????.

????? ??????

?????? ?????? ?? ??????? ?????? ???????? ????? ????? ?????? ???? ????? ??? ????? ????????.

??????: ?????? ????? ???? ???????. ???? ??? ????? ???? ??? ?????? ?????, ??????? ????? ???? ??????? ?????? ????? ?????? ??????? ????? ??? ????? ?????? ?????. ???????? ????? ???? ?????? ?? ??? ??? ?????????? ?????? ???? ???????. ????? ????????? ????????? ?????? ?????? ?? ???? ?????, ????????, ???????.

???? ?????? ????: ?????????? ???????? (?? 2 ?"? ?? 0.074 ?"?) ??????? ??????? ????????, ???? ????? ????? ??????, ??? ??????, ?????? ????? ???? ??????.

spiral concentration

?????? ???? ?????? ??????????? ????

?? ?????	???? ?????? ????? ???????	????? ?????	????? ??????	????? ?????? ????? ??????
????? ?????	20 ~ 0.5 ?"?	??? ??????? ????? ????, ???? ????? ?????, ?????? ?????	???? ????? ?????, ?? ???? ???? ?????? ???? ???	??? ????, ???????, ????? ????, ???? ???
???? ??????	2 ~ 0.038 ?"?	??? ????? ??-???, ??? ??????? ??????, ????? ???? ?????? ????? ????	?????? ????? ????? ????, ???? ???? ????	???????, ???, ????? ??? ????, ??? ??????? ????? ??????
???? ?????? / ???? ??????	1 ~ 0.075 ?"?	??? ????? ???? ?????, ????? ????? ?? ???? ????, ????? ?????	????? ??????? ??????	??? ????, ?????/????? ????, ????? ????? ??
???? ??????????	0.074 ~ 0.01 ?"?	???? ???? ????? ????? ???? ????? ???? ?????? ?? ??? ?????? ????? ????????	???? ????? ????? ??????? ????	??? ???? ??, ????? ????? ???? ???????? ?????? ??? ??????
????? ?????? ??? (DMS)	????? ??? ????? ?-6 ?"?, ????? 100	????? ???? ????? ?????? ???? ??????, ???? ?? ???? ????? ??????	???? ????? ?????? ?????? ?????? ???? ???????	???, ????? ???? ????? ???? ????? ???? ?????
????? ???? ???? ?????? ???	10 ~ 0.1 ?"? ??? ???	????? ??? ?????, ????? ????? ??????	????? ???? ??? ????, ????? ????? ???? ?????? ????	????? ???? ?? ????? ????, ????? ??? ????

?????? ??????? ???????? ?? ????? ?????? ??? ??? ??????

???? ???????? ????? ?????? ????????: ????? ????? ????, ????? ??????, ??? ????? ??????? ??????.

????? ??? (???? ????)

???? ??????? ??? ???? ?????? ??? ????? ????: ???? ????? ???? = ????? ????? ??? ???? ?????? ????? ???? ????.
2. ???? ???? ?????? ???: ???? ?????? ????? ????? ????? ??? ????? ???? ?????; ????? ??? ?? ????? ???? ???? ?????? ?????.
3. ???? ??? ????: ??? ???? ???? ?? ??????? ?? ?????, ????? ?? ????????????? ?????????, ?? ????? ??? ????.
4. ???? ???? ???????: ??? ?????? ?? ?????? ???? ?? ????? ??????, ???? ???? ????? ??? ???? ???????? ???? ??? ????????? ??

?????? ????? ??????

????? (???? ??? ???) ?????? ?? ??????? ?????? ?? ??????. ???? ???? ?? ???????, ???? ????? ?? ??????? ?? ?????.

????? (????? ?????): ??? ???? ???? ??? ?????? ??????? ?????. ???? ??????? ????? ?? ???? ????? ???????.
Water: ?????? ????????; ???? ????.
?????? ????? / ??????? ?????? (HMS): ??? ????, ?? ??? ????? ????? ???? ?????????.

??? ????? ????? ?????

?? ???? ???? ?? ???? ????? ???????? ???? ???? ???????, ?????? ??????? ?????. ??????? ???????? ??? ????? ??? ??????:

??? ????: ???? ???? ???? ????? ????? ???? ??????? ?????; ???? ??? ????? ?? ?????? ?????.
?????? ?????? ?????? Affects the viscosity of the pulp; must be maintained within the equipment’s optimal range.
??? ????? ??? (????????, ??????): ????? ?????? ?????? ?????? ?? ?????? ?????????? ?? ???????.
?????? ??? ?????????? (??'????): ????? ?? ???? ???????? ?????????????? ?? ????????.
??? ?????????? (???????) Determines the “effective gravity” and the recovery of fine particles.

??????? ?????? ??? ??? ???

??? ????	?????(??) ???	???? ????? ?????	?????
??? ????	??? ?????	??????, ???????, ????? ????? ?????????, ??????	?????? ?????? ???? ????? ???????
??? ??? ???	??? ?????, ????????	???????????? ???????????? (????? ??????), ?????? ??????	???? ????????? ??? ????? ?????? ??????? ??? ??????
????	???????	????? ???, ??????? ??????, ??????	????? ????? ???? ?????? ???
??????	??????, ?????????	?'????, ?????? ???, ???????	?????? ?????? ????? ?? ????? ???? ??????
??? ??????	???????, ??????, ?????	???????, ??????? ??????, HMS	??????? ???? ??? ????
???????	???????	???????, ?????? ???, ?????? ???????	????? ????? ?? ????? ???????
????? ????	???????, ??????	?'????, ???????, HMS	???? ??????? ????? ???? ????? ??
????	?????????, ????????	??????, ???????	???? ?????? ?????? ?????? ???? ??????? ??????

?????? ?????? ?????? ????? ??? ???????? ?? ????? ??????

???? ???? ????? (??? ????? ?????? ???)

??? ???? ?? ???? ?????? ?????? ?? ????? ??????. ???? ?'?? + ????? ????? ????? + ????? ???? ?????? ?????? ??? 93% ???? ????? ??, ?????? ???? ?????? ??? ??????? ???????, ????? ???? ????. ????? ?? ??? ?????? ????????, ??????????? ???? ????? ????? ?? ???? ?????? ???? ?????????? ?? ???????.

2. ???? ??? ?? ?????? ????

???????? ????????? ?? ??????? ???????? ????? ????????. ????? ????? ???? ???????? ?????????? ?? ????? ????? ?????? ??? ?????? ???????? ?????? ?????? ????????? ???????? ????, ??????????? ?'?????? ????'???, ??? ?????? ??? ????? ???? ????.

3. ??? ??????? ?????? ??????? ????

?????, ???????, ???? ???? ?? ??????? ???? ?????? ????? ?????? ???? ????? ???? ???????? ?? ?????? ??????? ?? ?????; ????? ?????? ??? ????? ???? ???? ????? ????? ?????? ????? ?? ??? ???? ?????.

4. ??? ?????? ????? ???? ??? ?????

??????, ?????, ??????? ??? ???? ??????? ?????? ?????? ????? ?????? + ????? ??? ?????? ????? ??? ?????? ????? ????? ????? ?????? ?????? ???? ??????.

?????? ????? ????

????? ????? ??? ?????? ?'?? ?? ???? ????? ????? ????, ?????? ??? ??? ????? ??? ?? ??? ???? ???????.

6. ????? ????? ???? ????? ????? ?????? ????

????? ?????? ?????? ??????? ?? ????? ????? ?????? ?????? ?????? ?????? ?????? ?????, ?????? ????? ?????? ?? ????? ???????.

???? ??????? ????? ????? ?????? ???????? ???????

???? 1: ?????? ???????, ???? ???? ???????? ?????? ??? ?? 500 ??? ????

?????? ?????: Coarse native gold 0.1–1 mm, low clay content, local water shortage
????? ?????: ???? ????? ???? ????? ????? + ????? ?????? + ????? ????? ?????? ???? + ????? ??? ?????
?????? ??????: ????? ?????? ?? ??? 93.38%, ??? ???? ?????? ?????? 85%, ????? ????? ???? 86%, ????? ?????? ???? ?-40% ????? ????? ??????

???? 2: ???? ????? ????? ?? ????????? ????? ???? ?? 2000 ???

?????? ?????: ??? ?????? ?????? ?? ???????-??????, ????????? ????? ????? ?? ????
????? ?????: ????? ????? + ????? ?????? ??-??? + ????? ??????? ???? ?????? ??????
?????? ??????: ???? ?????? ?? ??????? 66%, ?? ????? ?? ??????? 82%, ????? 65% ?? ????? ?????? ???? ??? ??? ????? ???????? ??????

???? 3: ?? ????? ??? ??????? ????? ???? ???? ?? 1200 ??? ????

?????? ?????: ??? ?????? ?????, ????? ??????
????? ?????: ????? ??????? ????? ???? ?????? + ???? ???? ????? ?????? ?????
?????? ??????: ???? ???? ?? ????? ??????? ????? 88%, ????? ????? ?? ????? ?????, ???? ????? ????? ?????

????? ????? ??????? ?????? ?????

????? ????? ??? ?????? ????? ????????? ?????? ?????? ???? ?????? ??????? ??????. ????????? ?????? ???????, ?????? ???????? ?????? ???????? ????????. ?? ???, ?????? ????? ?????? ????? ????? ???? ?????? ?????? ?????? ??????.

???? ????? ???, ??????? ????????, ???????? ????? ?? ???????:

????? ????? ?? ?????? ???? ??? ???? ?????: ????? ??????????, ???? ????? ?????? ??????.
2. ????? ???? ????? ???????: ????? ???? ????? ????? ??, ???????? ????? ??????, ????????? ????? ??. ????? ??????? ??????????? ???? ????? ??.
3. ???? ????? ???: ??????? ?? ??????? ??????? ????? ???? ????, ???? ??-???? ???? ???? ???? ???? ?????? ???.
4. ????? ????? ??????: ??? ?????, ????? ???? ??????? ????? ?????? ????? ????? ????? ??????.
5. ????? ?????: ??????? ???? ???? (<0.1 ?"?) ?????? ?????? ?????????. ?? ?????? ??????? ????????? ????? ??? ?????? ????? (????, ????????) ?? ?? ????.

????? ?????? ?? ????? ?? ??? ?????

?: ??? ???? ?????? ?????? ??????? ?????? ????? ?????? ?????

?: ???? ????? ?????? ??? ?'???? ???????? ???? ?????? ???? ?-74 ?????? (??? 200) ?????? ?????? ????? ???? ?? ??? ???? ?????? ?? ???? ???????. ?? ???, ?????? ???????? ????????????? ??????? ?????? ?? ??????? ??? ????? ????? ?? ?? 60G ?? ????, ???????? ????? ???? ?? ??????? ????? ?? ????? ?? 10 ??????.

??? ????? ??????? ????? ????? ?????? ?? ????? ?? ????? ????? ????

A: ?? ?? ????????? ?? ????? ??? ???? ?????. ???? ????? ???????? ??????? ???????? ???? ??? ???????? ?????? ?????? ?????? ????? ????? ??????????, ????? ????? ????. ?? ???, ?????? ???????? ??????? ?????? ?????? ?????? ???????: ????? ?????? ??? ????? ??????? ???? ?????, ??? ????? ??????? ??? ????? ?? ??????? ?????-?????.

?? ?? ??????? ???????? ???????? ?? ?????? ?????? ???????

?: ??????? ?? ????? ????? ????? ?????? ??????? ???????: ????? ??? ????? ?????? ?? ?????? ???? ???? (????? ????? ???? ????? ????? ??? ????), ??????? ???? ?????? ????? (????? ????? ???? ????? ????), ???????? ??????, ?????? ?? ?????? ????? ???? ?????? ?????? ??????? ?? ??? ??????.

????: ??? ?????? ??????? ??? ?????? ?????? ???? Mine-e??????? ????????? ?????? ????? ??????????

A: ?????? Gravity ??? ???? ????? ????? ?????? ????? ?????? ??? ?????? ??????. ?? ????? ??????? ?? ????? ?????? ?????? ?????, ???? ????? ???? ??????? ?????? ?????? ????? ?????? (OPEX), ?????? ???? ????? ???? ?? ??? ????? ?? ??????? ???? ???????? ????? ?????.