Chemical specification:total alumina – min 48.5%; max 53%;total silica – min 1.20%; max 2.10%;reactive silica – max. 3.2%;Fe – max 22%;Ti – max 4%;organic carbon – max 0.15%;moisture content – min 5.5%; max 7.5%
大神帮我看下，这个是什么级别的铝土矿？