ratholing Archives - PowderTechnology info

Wood Powder Feeding Problems: Separating Moisture Effects From Particle Interlocking
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Wood Powder Feeding Problems: Separating Moisture Effects From Particle Interlocking

Bulk Solids Characterization, Cohesion, Energy Industry, Feature Article, Flowability, Hoppers, Milling, Moisture Sensitivity, Rotating Drum, Shear

Wood Powder Feeding Problems: Separating Moisture Effects From Particle Interlocking

Wood powder can bridge because fibrous particles mechanically [...]

By Stephane Sloots|2026-10-03T16:53:01+01:003 October 2026|Categories: Bulk Solids Characterization, Cohesion, Energy Industry, Feature Article, Flowability, Hoppers, Milling, Moisture Sensitivity, Rotating Drum, Shear|Tags: Biomass powder, bridging, combustible dust, dynamic vapor sorption, hopper discharge, hygroscopicity, Moisture Sensitivity, Particle interlocking, particle shape, powder flow, ratholing, Rotating drum testing, shear testing, Torrefaction, Wood powder, Wood powder feeding|0 Comments

Why Hopper Fill Level Changes Powder Discharge
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Why Hopper Fill Level Changes Powder Discharge

Conveying, Flowability, Hoppers, Insights

Why Hopper Fill Level Changes Powder Discharge

Do not diagnose a feeder as if the [...]

By Martijn Daalder|2026-06-27T14:42:13+01:006 June 2026|Categories: Conveying, Flowability, Hoppers, Insights|Tags: aerated bulk density, arching, Bulk density, deaeration, feeder instability, feeder pulsing, flowability, hopper discharge, hopper fill level, hopper flow, permeability, pneumatic conveying, powder compaction, powder discharge, powder flow, powder handling, ratholing, retained air, screw feeder, settled bulk density|0 Comments

Why FIBC Discharge Problems Often Start at the Liner-Spout Interface
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Why FIBC Discharge Problems Often Start at the Liner-Spout Interface

Big Bags, Electrostatic Effects, Flowability, Hoppers, Industrial Hygiene, Insights

Why FIBC Discharge Problems Often Start at the Liner-Spout Interface

FIBC discharge problems are often blamed on the [...]

By Martijn Daalder|2026-06-27T14:42:25+01:0011 April 2026|Categories: Big Bags, Electrostatic Effects, Flowability, Hoppers, Industrial Hygiene, Insights|Tags: arching, bag discharge, big bags, dust release, FIBC discharge problems, flexible intermediate bulk containers, flow aids, liner spout interface, outlet spout, powder flow, powder handling, ratholing, venting|0 Comments

Why Powder Flow Often Fails After a Short Shutdown in Hoppers and Feeders
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Why Powder Flow Often Fails After a Short Shutdown in Hoppers and Feeders

Flowability, Hoppers, Insights, Silo storage

Why Powder Flow Often Fails After a Short Shutdown in Hoppers and Feeders

Powder flow after a short shutdown often fails [...]

By Stephane Sloots|2026-06-27T14:42:31+01:0014 March 2026|Categories: Flowability, Hoppers, Insights, Silo storage|Tags: arching, bulk solids handling, deaeration, feeder restart, hopper discharge, powder flow, Powder troubleshooting, ratholing, restart instability, time consolidation|0 Comments

Permeability Collapse in Hopper Discharge Causes “Random” Ratholes and Sudden Flooding
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Permeability Collapse in Hopper Discharge Causes “Random” Ratholes and Sudden Flooding

Flowability, Hoppers, Insights, Permeability, Silo storage

Permeability Collapse in Hopper Discharge Causes “Random” Ratholes and Sudden Flooding

Permeability collapse in hopper discharge often triggers instability [...]

By Stephane Sloots|2026-06-27T14:42:36+01:007 February 2026|Categories: Flowability, Hoppers, Insights, Permeability, Silo storage|Tags: aeration, compressibility, deaeration, fine powders, flooding, hopper discharge, permeability, powder flow, ratholing, venting|0 Comments

Wall Friction Drift in Hoppers: Why Discharge Degrades Over Time
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Wall Friction Drift in Hoppers: Why Discharge Degrades Over Time

Bulk Solids Characterization, Caking, Flowability, Hoppers, Insights, Moisture Sensitivity, Shear

Wall Friction Drift in Hoppers: Why Discharge Degrades Over Time

Many hopper issues are boundary-limited. Wall friction drifts [...]

By Martijn Daalder|2026-06-27T14:42:38+01:0031 January 2026|Categories: Bulk Solids Characterization, Caking, Flowability, Hoppers, Insights, Moisture Sensitivity, Shear|Tags: fouling, funnel flow, hopper discharge, humidity control, liners, mass flow, ratholing, shear cell testing, silo flow, wall friction|0 Comments

Hopper Bridging: Why One Hopper Always Bridges First
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Hopper Bridging: Why One Hopper Always Bridges First

Bulk Solids Characterization, Flowability, Hoppers, Insights, Silo storage

Hopper Bridging: Why One Hopper Always Bridges First

Hopper bridging is rarely random. It points to [...]

By Stephane Sloots|2026-04-18T10:26:02+01:0029 November 2025|Categories: Bulk Solids Characterization, Flowability, Hoppers, Insights, Silo storage|Tags: arching, bulk solids handling, cohesive powders, consolidation stress, flow problems, flowability, funnel flow, hopper bridging, hopper design, hopper outlet diameter, hopper troubleshooting, mass flow, powder flow, powder flow function, powder history, powder testing, ratholing, recycled fines, silo design, wall friction|0 Comments