Cost-Effective Treatment of Hemihydrate Phosphogypsum and Phosphorous Slag as Cemented Paste Backfill Material for Underground Mine

Table 2

Mix proportions of HPG-PS.

No.	HPG/PS ratio	Quicklime content (%)	Cement content (%)	Mass fraction (%)
S1	4	0	0	66
S2	4	1	0	66
S3	4	2	0	66
S4	4	3	0	66
S5	4	4	0	66
S6	4	5	0	66
S7	6	0	0	66
S8	6	1	0	66
S9	6	2	0	66
S10	6	3	0	66
S11	6	4	0	66
S12	6	5	0	66
S13	8	3	0	66
S14	10	3	0	66
S15	14	3	0	66
S16	4	3	0	69
S17	6	3	0	69
S18	8	3	0	69
S19	10	3	0	69
S20	14	3	0	69
S21	4	3	5	69
S22	6	3	5	69
S23	8	3	5	69
S24	10	3	5	69

The quicklime and cement were added according to the HPG quality.