Here is the formula for specific gravity of a slurry, S is:

S = specific gravity of slurry

Si= specific gravity of liquid phase

Ss= specific gravity of solids phase

Cw = concentration of solids by weight

Cv= concentration of solids by volume

EXAMPLE: if the liquid has a specific gravity of 1.2 and the concentration of solids by weight is 35% with

the solids having a specific gravity of 2.2, then:

You will also find this Nomograph useful.

- 1.1 Pulp Densities
- 1.2 Calculation of Circulating Load in a Classifier
- 1.3 Calculation of Classifier Efficiency
- 1.4 Screen Efficiency
- 1.5 Measure Tonnage by Water Ratio (Pulp Dilution)
- 1.6 Pulp Density Tables
- 1.7 Concentration and Recovery Formulas
- 1.8 Reagent Consumption Calculations
- 1.9 Liquid-Solid Relationships Specific Gravity & Volume
- 1.10 Ratio of Concentration by Assay
- 1.11 Mill Water to Ore Ratio Requirements
- 1.12 Resistance of Various Materials to Crushing
- 1.13 Pulp Calculations
- 1.14 Reagent Consumption
- 1.15 Interpretation of Comparative Metallurgical Calculations
- 1.16 Calculate Economic Metal Recovery

**W/S Ratio**.—The mixture of ore and water in which the process of concentrating the valuable minerals is performed is always termed a PULP. Its constitution can be expressed by stating that it contains a certain percentage of solid particles or “ solids ”, but just as common a method of describing the proportion of water to ore is by expressing it as a Water/Solids or W/S ratio, the amount of solids always being taken as unity. Thus a pulp containing 25% of solids has a W/S ratio of 3/1.