理化性能 Physic-chemical properties		优等品 High quality product			一级品 Class 1 product			合格品 Qualified product
产品级别 Product grade		塑料级 Plastic	橡胶级 Rubber	电缆级 Calbe	塑料级 Plastic	橡胶级 Rubber	电缆级 Calbe	塑料级 Plastic	橡胶级 Rubber	电缆级 Calbe
白度(%) Whiteness(%)		90.0	90.0	90.0	85.0	85.0	85.0	80.0	80.0	80.0
细度，45μ m 通过率 ≥ Fineness 45μm Passing rate ≥		99.0	98.0	98.0	98.0	98.0	98.0	98.0	98.0	98.0
水分 ≤ Moisture ≤		0.5	0.5		0.5	0.7		0.5	1.0
二氧化硅 ≥ Silicon dioxide ≥		61.0			58.0			55.0
氧化镁 ≥ Magnesia ≥		31.0			29.0			27.0
三氧化二铁 ≤ Ferric oxide ≤		0.5			1.00			1.50
三氧化二铝 ≤ Aluminium sesquioxide ≤		1.00			2.00			3.00
氧化钙 ≤ Calcium oxide ≤		0.5			1.5			4.5
烧失量(1000℃) ≤ Loss of ignition(1000℃) ≤		6.00	7.00	6.00	8.00	9.00	8.00	9.00	24.0	10.0
PH			8.0-10.0			8.0-10.0			8.0-10.0
酸溶物 ≤ Acid-soluble matter ≤			6.0			15.0			20.0
酸溶铁(以Fe203计) Acid-soluble iron(calculated by Fe203)			1.00	0.2		2.00	0.50		3.00	1.0
可溶铜 ≤ Soluble copper ≤			0.005			0.005			0.005
可溶锰 ≤ Soluble manganese ≤			0.05						0.05
酸不溶物≥ Acid-insoluble matter≥				90.0			87.0			85.0
磁铁吸出物 ≤ Magnet aspirate ≤				0.04			0.07			0.10
体积密度 g/cm3 Volume density g/cm3	松密度 ≤ Loose density ≤	0.45			0.55			0.65
体积密度 g/cm3 Volume density g/cm3	密度 ≤ Density ≤	0.90			0.95			1.00