我公司连云港现有500吨南非精粉，Cr2O3:43.27%,Fe:27.82%,SIO2:2.35%,Al2O3:14.95%,MgO7.64%,Cr:Fe ratio  :1.52,Moisture:3.62%,P<0.01%,S<0.01%,价格电议