Gravity Thickening Tests
Static and dynamic thickening test data can be collected to determine thickener sizing and operating parameters. The type of testing to be conducted will be determined by both the type of thickener desired and by the amount of sample available for testing.
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Key Determinations
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Pressure and Vacuum Filtration Tests
Vacuum and/or pressure filtration tests can be conducted on relatively small quantities of sample slurry. Tests conducted will collect a general set of data that would describe filter operation and performance in terms of production rate and achievable cake moistures.
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Key Determinations
- Unit production rates for most vacuum filter types
- Filter press sizing for most pressure filter types
- Predicted cake moisture at various operating conditions
- Cake dischargeability and stickability predictions
- Predicted wash efficiency at various operating conditions
- Technology recommendations based on overall performance
Slurry and Fluid Rheology (viscosity measurement)
Tests to determine apparent viscosity at known shear rates relative to solids concentration at known temperature and pH. Data analysis to determine the yield value for the slurry at various solids concentrations.
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Key Determinations
- Slurry sample viscosity at various temperatures, pH & ORPs, solids concentrations, etc.
- Development of flow curve for slurry sample at various conditions
- Development of correlation between yield value vs. solids concentration for slurry sample at various conditions
- Characterization of slurry sample as Newtonian vs. non-Newtonian
- General rheological characterization of heterogeneous and non-heterogeneous slurries
Flocculant Evaluation & Selection
Static clarification tests can be conducted on each distinct sample. The effect that, flocculant dosage, underflow density and other controllable physical parameters, within flowsheet constraints, has on Unit Area can be examined.
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Key Determinations
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Gravity Clarification Tests
Static clarification tests can be conducted on each distinct sample. The effect that, flocculant dosage, underflow density and other controllable physical parameters, within flowsheet constraints, has on Unit Area can be examined.
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Key Determinations
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Sample Characterization
Slurry sample characterization, may be conducted by us or by others, and should include liquor and solids specific gravities, particle size distribution of solids, P80 calculation, and normal or expected pH ranges for process streams.
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Key Determinations
- pH, ORP, & element concentrations
- Particle size determination (via wet & dry screening)
- Slurry density
- Solids content (by weight and volume)
- Solid specific gravity
- Liquor specific gravity
Pressure Clarification Tests
Tests can be conducted sample slurries with low solids concentrations, to determine design parameters for pressure leaf type clarification filters.
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Key Determinations
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