Electroosmotic Dewatering of Iron Ore Tailings: A Laboratory Study to Improve Geotechnical Properties

Table 2

Electro-osmotic test results for iron ore tailings: measured and calculated parameters for different voltage ranges.

Parameters	Applied voltage (volt)
	0	15	30	45	60	75	90
Saturated density (gr/cm^3)	2.336	2.250	2.048	2.004	1.932	1.780	1.670
Dry weight (gr)	37.2	37.2	37.2	37.2	37.2	37.2	37.2
Wet weight (gr)	58.4	56.3	51.2	50.1	48.3	44.6	41.8
Porosity (%)	84.8	76.4	56	51.6	44.4	29.6	18.4
Void ratio (%)	5.58	3.24	1.27	1.07	0.8	0.42	0.23
Water content (%)	56.99	51.34	37.63	34.68	29.84	19.89	12.37
Total discharge (cm^3)	0	31.6	35.2	38.8	40.6	51	77.4
Total discharge time (min)	0	180	165	180	180	195	225
Average discharge rate (cm^3/min)	0	0.1756	0.2133	0.2156	0.2256	0.2615	0.344
Average temperature (°C)	18	19.58	22.36	20.33	22.66	26.07	32.33
Average electric current (amp)	0	0.09	0.15	0.18	0.29	0.39	0.46
Average resistance (ohm)	0	166.67	196.08	255.68	204.78	191.33	193.97
Average conductivity (ohm^−1)	0	0.006	0.0051	0.0039	0.0049	0.0052	0.0052
Average consumed power (watt)	0	1.35	4.59	7.92	17.58	29.4	41.76
Energy consumption (kWh/dry-ton)	0	0.588	2.014	3.875	8.921	17.542	30.645