Recent Blogs
Revolving Hoisting Dredge and Bucket-Line Volume Calculator
Learn how a revolving clamshell hoist differs from a continuous bucket-ladder dredge. Use the bucket-line calculator to estimate delivered loose volume.
Klondike Mining Machine: Lancaster Washer and Gold Mass Balance | FIRGELLI
Learn how Hiscox’s Lancaster placer washer used a handle-driven riffle pan. Calculate gold mass balance separately from a general sluice-flow illustration.
Dry Gold Separator: Bellows Animation and Density Calculator | FIRGELLI
Explore a bellows-fed dry gold separator and compare mineral specific gravities. Calculate concentration criterion without assuming a gold-recovery rate.
Floating Dredge: Cutter Motion and Slurry-Flow Comparison | FIRGELLI
Explore a cutter-suction dredge’s swing motion. Calculate solids and water volume flows and compare entered velocities without claiming a blockage prediction.
Continuous Ditching Dredge Mechanism: How Bucket Chain Excavators Work, Parts, and Production Formula
Explore a bucket-chain ditching dredge and spoil carrier. Compare loose and bank throughput from bucket capacity, discharge rate, fill and swell.
Arastra Ore Mill Mechanism: How the Drag Stone Gold and Silver Ore Grinder Works
See how an arrastra sweep drags stones around a fixed bed. Calculate circular speed, lap time and travel distance, separately from ore throughput or metal...