#553 SILICON METAL SPEC.:

1.Si:98.5%(min) Fe:0.5% max Al:0.5%max  Ca:0.3% max
Size:10-100mm,90%min,or at customers'option

2.Package:1mt plastic woven bags with PE line

3.Feature:
Black silcion metal is produced at high tempreture in an electric resistance type furnace with quarts sand and petroleum coke as its raw materials .Its hardness is between fused alumina and synthetic diamond.