4.1 Factors influencing the separation Size and shape of particles The larger the particle, the quicker the sedimentation The particles to be separated off must not be so small that the mixture is close to colloidal state The smooth and round particle is easier separated off than the irregular one Rough treatment, e.g. in pumps, can split the particles with reduced size and separating speed as a result4.1 Factors influencing the separation • Size and shape of particles – The larger the particle, the quicker the sedimentation. – The particles to be separated off must not be so small that the mixture is close to colloidal state. – The smooth and round particle is easier separated off than the irregular one. – Rough treatment, e. g. in pumps, can split the particles, with reduced size and separating speed as a result