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PolskiBauxite Desliming Classifier (2D)
A counter-current wash classifier: bauxite ore and clay slimes fall through an upward wash-water stream, each grain sinking or rising according to its own real Stokes settling velocity, so desliming efficiency trades off directly against alumina loss as you move the controls.
The 3D original renders the same title as one instance of a shared "mineral processing lab" template used across hundreds of pages on this site — a spinning Three.js tailings-pond scene with slider labels (water, feed, clay) wired to a single generic formula, not an actual particle-settling model. This 2D companion builds the real mechanic the title and description promise: individual bauxite and clay grains, each with its own randomly assigned size, settling (or rising) through an upward wash-water column according to Stokes' law, corrected for hindered settling at realistic slurry densities via the Richardson–Zaki relation. Because clay grains are far smaller than bauxite grains at nearly the same mineral density, they settle orders of magnitude slower — raise the wash-water velocity and clay clears out to the overflow launder while coarse bauxite still sinks to the underflow, exactly as a real desliming classifier or hydrocyclone works. Push the wash velocity too high, though, and fine bauxite starts entraining into the overflow too, which the live Al₂O₃-loss readout catches in real time; the cut-size readout is solved from the same settling equation for whatever wash velocity is currently set.
2D wash-classifier lab: Stokes' law settling for individually sized bauxite and clay grains, Richardson–Zaki hindered-settling correction for slurry density, and live desliming-efficiency / Al₂O₃-loss / cut-size readouts recomputed from a rolling window of exits.
2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install
❓ Frequently Asked Questions
Q: Why do clay and bauxite separate at all if they're nearly the same density?
A: Stokes' law scales settling velocity with the square of particle radius, not density alone. Clay grains here are roughly 2–15 micron and bauxite grains 60–350 micron — a size gap of one to two orders of magnitude — so even with similar mineral density, bauxite sinks vastly faster than clay under the same conditions.
Q: Why does raising slurry solids hurt desliming efficiency?
A: Denser slurries hinder settling — particles interfere with each other and with the upward-displaced fluid, which the Richardson–Zaki correction (1 − φ)^4.65 captures. As φ (the solids fraction) rises, every particle's effective settling velocity drops, so more of everything — including bauxite that should report to underflow — gets carried up into the overflow.
Q: What does the cut-size d₅₀ number actually mean?
A: It's the particle radius at which the hindered settling velocity exactly equals the current wash-water velocity — solved directly from the same Stokes/Richardson–Zaki equation the particles obey. Grains larger than d₅₀ mostly sink to underflow; grains smaller mostly rise to overflow.
Q: Can I get 100% desliming with zero alumina loss?
A: Not with a single wash stage — there's always a size range near the cut point where clay and fine bauxite behave almost identically, so some trade-off between the two readouts is unavoidable. Real plants deal with this using multiple classification stages in series.
Q: Why is the 3D version so different from this one?
A: The 3D page reuses this site's shared "mineral processing lab" Three.js template — decorative tanks and slider labels with one generic formula behind them, not a settling simulation. This 2D page implements the actual Stokes-law particle classification that bauxite desliming really relies on.