normal align=center>铝土矿用作电熔刚玉原料时的质量要求

normal align=center>项目

normal align=center>第二砂轮厂

normal align=center>第四砂轮厂

normal align=center>ω（Al2O3）%

normal align=center>≥85

normal align=center>≥80

normal align=center>ω（Fe2O3）%

normal align=center>＜5

normal align=center>＜6

normal align=center>ω（SiO2）%

normal align=center>＜5.6

normal align=center> 

normal align=center>ω（TiO3）%

normal align=center>3.5～6.5

normal align=center>＜5.5

normal align=center>ω（CaO）%

normal align=center>＜0.4

normal align=center> 

normal align=center>ω（CaO+ MgO）%

normal align=center> 

normal align=center>＜1.2

normal align=center>ω（烧失量）%

normal align=center>＜0.5

normal align=center>＜1

normal align=center>铝硅比值（A/S）

normal align=center>≥15

normal align=center>≥12

normal align=center>进厂块度 mm

normal align=center>＜250

normal align=center>20～300

normal align=center>烧失率 %

normal align=center> 

normal align=center>＜4

注：l、一水硬铝石型铝土矿；2、熟料；3、供矿品位