Applications
- Technological design of silos and bulk solid containers
- Silo calculations and actions on silos according to EN 1991-4
- Identification of flow problems
- Prevention of arching and determination of minimal outlet opening
- Time consolidation of bulk solids
- Load on containers and discharge aids
- Divergence coefficients of bulk solid parameters
- Silo design for mass flow
- Optimization of flow aids and/or process engineering processes
- Prevention of problems during product changeover
- Comparison of flowability of bulk solids
- Quality control and product certification
- Process control to prevent operational disruptions and/or damage
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Technological Silo Calculation
Discharge performance with vibrating floor depending on flowability
Comparison of flowability of bulk solids
Rheological Bulk Solids Measurements
Take advantage of our over thirty years of experience in bulk material analysis. All measurements are performed on standardized and certified instruments in our laboratory with professional expertise. This provides you with real physical material data necessary for characterization and as a basis for further technological calculations.
Comprehensive digitally networked process procedures, from sample preparation through measurement to evaluation, guarantee high quality standards as well as fast and economical execution.
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YIELD LOCI
ASTM D6682-A, angle of internal friction φi, effective angle of friction φe, cohesion τc, horizontal load ratio λ and λ0, unconfined compressive strength σc, flowability factor (FL, FLA, FLR or ffc),
+ time consolidation
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WALL FRICTION
ASTM D6682-B, wall friction angle φw or φx, wall friction coefficient μw, adhesion τw,
+ time consolidation
+ wall surface changes
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BULK DENSITY, FLOW DENSITY
ASTM D6393, ISO 679 bulk density ρb0, ASTM D6682-C bulk density function ρb(σ), ASTM D6682-A flow density ρbr(σr)
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TAP DENSITY
DIN EN ISO 787, ISO 3953, ASTM B527, Hausner ratio, compressibility factor (%), ...
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ANGLE OF REPOSE
DIN ISO 4324, ASTM D6393
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BULK SOLID MOISTURE
%M (percent moisture), %S (percent solid), ...
Bulk Solids Evaluations
According to the measurements performed, clearly arranged tabular and graphical evaluations of the measurements are available for characterization and for further calculations. Comparison of bulk solid properties and frequently used bulk solid functions are automatically calculated and complement the evaluations. You receive a calculation tool with which you can test various silo geometries based on the measurement results and estimate and compare the optimal design for your bulk solid.
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Raw data and evaluation of individual measurements
Yield locus, wall friction, bulk density, bulk solid moisture, angle of repose, tap density, ...
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Descriptive statistics of one and/or multiple bulk solids
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Yield locus envelope internal friction (linear and exponential)
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Function of effective friction angle φe(σ1)
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Flow function
σc(σ1), flowability
factor FL(σ1), ffc(σ1)
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Density function ρb(σ1), flow density
ρbr(σr)
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Comparison of wall friction
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Silo calculation
Mean values including standard deviations SD, divergence coefficients aK, aμ, aγ, silo classification according to EN 1991-4, silo stress calculation vertical pressure Pv, horizontal pressure Ph, wall pressure Pw in shaft and hopper for (active) filling state and (passive) discharge state, limiting criterion for mass flow/funnel flow, load at discharge, arching in silo (critical outlet diameter), ...
Measurement Service
We are happy to advise you on the selection of appropriate tests according to your requirements. After receipt of the samples, we carry out the agreed measurements as quickly as possible and provide you with a comprehensive report with evaluations.
- Professional advice
- Fast execution of measurements
- Comprehensive report with evaluations
- Personal support and follow-up discussion of results
- Recommendations for practical implementation
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Free and non-binding