12. Construct a differential radius distribution curve for a suspension of Prosyanovsky kaolin in aniline using the following experimental data of sedimentation analysis (t is the settling time for the point at which the tangent to the sedimentation curve is drawn):
t, s 60 300 600 1200 1500 1800
Q, % 15 38 22 12 4 9
Dispersed phase density ρ = 2.3*103 kg/m3, medium density ρ0 = 1.02*103 kg/m3, medium viscosity μ = 4.43 *10-3 N*s/m2, height H = 1*101 m.

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