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Slurry Densities

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Slurry is a mixture of a solid and a liquid. The density of a slurry can be calculated as

ρm = 100 / [cw / ρs  + [100 - cw] / ρl]                                 (1)

where

ρm = density of slurry (lb/ft3, kg/m3)

cw  = concentration of solids by weight in the slurry (%)

ρs =  density of the solids (lb/ft3, kg/m3)

ρl =  density of liquid without solids (lb/ft3, kg/m3)

Slurry concentration by weight can be measured by evaporating a known weight of slurry - and measure the weight of dried solids.

Example - Calculating Slurry Density

The density of a slurry where

  • the density of the solids is 2500 kg/m3
  • the density of the liquid is 1000 kg/m3
  • the concentration of the solids is 30%

can be calculated as

 ρm = 100 / [(30 %) / (2500 kg/m3) + [(100 %) - (30 %)] / (1000 kg/m3)]

    = 1220 kg/m3

Slurry Density and Specific Weight Calculator

The density of a slurry can be calculated with the calculator below:


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Water Slurries - Typical Specific Gravity and Slurry Solids Concentration

Water Slurries - Typical Specific Gravity and Slurry Solids Concentration
ProductSGStypical Solids Concentration
% weight% volume
Coal 1.40 45 - 55 37 - 47
Copper concentrate 4.30 60 - 65 26 - 30
Gilsonite (asphalt, bitumen) 1.05 40 - 45 39 - 44
Iron ore 4.90
Iron sands 1.90
Limestone 2.70 60 - 65 36 - 41
Magnetite 4.90 60 - 65 23 - 27
Sand 2.65 43 23 - 30

Specific Gravity of Water based Slurries

Specific gravity of water based slurries vs. specific gravity of the solid and consentration of the solid in the slurry:

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Related Topics

• Densities

Densities of solids, liquids and gases. Definitions and convertion calculators.

• Material Properties

Properties of gases, fluids and solids. Densities, specific heats, viscosities and more.

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Densities of common products - Imperial and SI-units.

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Slurry Transports - Minimum Flow Velocities

Flow velocities in slurry transport systems to avoid settling of solids.

Stockpile Volumes

Volume of natural stockpiles - cubic feet, yard, metre and decimetre.

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