An Experimental Study on Wetting of Coal Dust by Surfactant Solution

Table 4

The effect of sodium sulfate additive on the surface tension of surfactant solution.

OP-10			SDBS
cm2 (%)	0.00005%	0.0005%	0.005%	0.00005%	0.0005%	0.005%
0	54.8	43.8	32.6	58.0	42.8	28.8
0.1	54.5	43.1	32.6	57.1	42.4	29.7
0.2	54.3	42.7	32.4	56.6	41.7	29.9
0.3	53.7	42.5	32.3	55.7	41.7	29.3
0.4	52.9	42.4	32.1	55.6	40.9	28.7
0.5	52.3	42.1	32.1	54.1	40.3	28.6
0.6	52.6	41.9	32.2	53.7	39.7	28.3