## Eq represents the fine grit concentration in the

The suspension ratios of fine grit with different particle sizes are shown in Fig. 1b. The suspension ratio remained unchanged with increasing operation time, which indicated that A-770041 the suspension properties of fine grit remained unchanged when the hydraulic flow state was constant. The mean values of the suspension ratio of fine grit of 14 μm, 33 μm, 50 μm, 66 μm and 107 μm were 0.848, 0.664, 0.483, 0.317 and 0.073, respectively. Smaller particle sizes corresponded to larger suspension ratios. The regression between the particle size and suspension ratio (Fig. 2) shows that primary body are significantly correlated (R2 = 0.995, P = 0.003 < 0.01):equation(3)α=1.03-0.013×dp+3.8×10-5×dp2,where dp is the particle size of fine grit (μm). Eq. (3) is the formula used to calculate the suspension ratio of fine grit.

Fig. 2. Correlation between particle size and suspension ratio (dp and α are the particle size and suspension ratio of fine grit, respectively).Figure optionsDownload full-size imageDownload as PowerPoint slide