Table 3. Initial composition of Al–Si melt and final composition of refined Si with different lowering rates.

No.	Loweringrate, mm min–1 (±0.02)	Initial composition of the Al–Si melt			Final composition of refined Si, ppma
		B, ppma	Hf, ppma	Al, at.%	B	Hf	Al
1	0.55	153	0	55.0	62.0	0	317
2	0.55	153	205	55.0	13.0	0.4	439
3	0.55	153	410	55.0	12.0	42.6	496
4	0.55	153	820	55.0	6.4	82.0	526
5	0.55	153	1025	55.0	4.6	127	435
6	0.55	153	410	64.0	2.7	66.8	611
7	0.55	153	410	45.0	37.3	39.4	473
8	0.22	153	410	55.0	10.6	26.1	353
9	0.41	153	410	55.0	12.8	39.4	401
10	1.36	153	410	55.0	17.3	131	848