篩分: 1. >6cm 約8% 2. <6cm 約92% 40% 35% 30% 25% 20% 15% 10% 5% 0% 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 篩分後(<6cm)還原碴粒徑分布 0 10 20 30 40 50 60 Particle size (mm) 19 還原碴停留篩上分布 還原碴粒徑分布