# Slurry Densities

## Calculate density of a slurry

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

ρ_{m}= 100 / [c_{w }/ ρ_{s}+ [100 - c_{w}] / ρ_{l}] (1)

where

ρ_{m}= density of slurry (lb/ft^{3}, kg/m^{3})

c_{w }= concentration of solids by weight in the slurry (%)

ρ_{s}= density of the solids (lb/ft^{3}, kg/m^{3})

ρ_{l}= density of liquid without solids (lb/ft^{3}, kg/m^{3})

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/m*^{3} - the density of the liquid is
*1000 kg/m*^{3} - the concentration of the solids is
*30%*

can be calculated as

ρ_{m}= 100 / [(30 %) / (2500 kg/m^{3}) + [(100 %) - (30 %)] / (1000 kg/m^{3})]

= 1220 kg/m^{3}

### Slurry Density and Specific Weight Calculator

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

solids concentration - (%)

density solid - (kg/m^{3}, lb/ft^{3})

density liquid - (kg/m^{3}, lb/ft^{3})

### Water Slurries - Typical Specific Gravity and Slurry Solids Concentration

Product | SG | Stypical 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: