Removal of Hematite Water-Based Filter Cake Using Hydrochloric Acid

Table 3

Summary of the solubility tests.

Test index	Concentration (vol.%)	Temperature (°C)	Duration (hours)	PSD (microns)	Hematite weight (grams)	Solubility (wt.%)
1	5.0	100	24	As in Figure 2	4	32
2	7.5	100	24	As in Figure 2	4	38
3	10.0	100	24	As in Figure 2	4	77
4	12.5	100	24	As in Figure 2	4	95
5	15.0	100	24	As in Figure 2	4	98
6	12.0	100	3	As in Figure 2	4	60
7	12.5	100	5	As in Figure 2	4	74
8	12.5	100	8	As in Figure 2	4	86
9	12.5	100	12	As in Figure 2	4	92
10	12.5	100	16	As in Figure2	4	95
11	10.0	100	24	0-25	4	86
12	10.0	100	24	25-50	4	77
13	10.0	100	24	50-75	4	68
14	10.0	100	24	75-100	4	47
15	12.5	50	24	As in Figure 2	4	32
16	12.5	75	24	As in Figure 2	4	46
17	12.5	125	24	As in Figure 2	4	97
18	12.5	100	24	As in Figure 2	2	100
19	12.5	100	24	As in Figure 2	3	99
20	12.5	100	24	As in Figure 2	4	95
21	12.5	100	24	As in Figure 2	5	78
22	12.5	100	24	As in Figure 2	6	66