normal align=center>特级钨精矿国家标准（GB2825-81）

normal align=center>品种

normal align=center>ω（WO3）

normal align=center>不小于  %

normal align=center>杂质（ω B）不大于 %

normal align=center>S

normal align=center>P

normal align=center>As

normal align=center>Mo

normal align=center>Ca

normal align=center>Mn

normal align=center>Cu

normal align=center>Sn

normal align=center>SiO2

normal align=center>Fe

normal align=center>Sb

normal align=center>Bi

normal align=center>Pb

normal align=center>Zn

normal align=center>黑钨特-Ⅰ-3黑钨特-Ⅰ-2黑钨特-Ⅰ-1

normal align=center>70

normal align=center>70

normal align=center>68

normal align=center>0.2

normal align=center>0.4

normal align=center>0.5

normal align=center>0.02

normal align=center>0.03

normal align=center>0.04

normal align=center>0.06

normal align=center>0.08

normal align=center>0.10

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>3.0

normal align=center>4.0

normal align=center>5.0

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.04

normal align=center>0.05

normal align=center>0.06

normal align=center>0.08

normal align=center>0.10

normal align=center>0.15

normal align=center>4.0

normal align=center>5.0

normal align=center>7.0

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.04

normal align=center>0.05

normal align=center>0.10

normal align=center>0.04

normal align=center>0.05

normal align=center>0.10

normal align=center>0.04

normal align=center>0.05

normal align=center>0.10

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>黑钨特-Ⅰ-3黑钨特-Ⅰ-2黑钨特-Ⅰ-1

normal align=center>70

normal align=center>70

normal align=center>68

normal align=center>0.4

normal align=center>0.5

normal align=center>0.6

normal align=center>0.03

normal align=center>0.05

normal align=center>0.10

normal align=center>0.05

normal align=center>0.07

normal align=center>0.10

normal align=center>0.010

normal align=center>0.015

normal align=center>0.020

normal align=center>0.3

normal align=center>0.4

normal align=center>0.5

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.15

normal align=center>0.20

normal align=center>0.25

normal align=center>0.10

normal align=center>0.15

normal align=center>0.20

normal align=center>3.0

normal align=center>3.0

normal align=center>3.0

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>白钨特-Ⅰ-3白钨特-Ⅰ-2白钨特-Ⅰ-1

normal align=center>72

normal align=center>70

normal align=center>70

normal align=center>0.2

normal align=center>0.3

normal align=center>0.4

normal align=center>0.03

normal align=center>0.03

normal align=center>0.03

normal align=center>0.02

normal align=center>0.03

normal align=center>0.03

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.3

normal align=center>0.4

normal align=center>0.5

normal align=center>0.01

normal align=center>0.02

normal align=center>0.03

normal align=center>0.01

normal align=center>0.02

normal align=center>0.03

normal align=center>1.0

normal align=center>1.5

normal align=center>2.0

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.02

normal align=center>0.03

normal align=center>0.03

normal align=center>0.01

normal align=center>0.02

normal align=center>0.03

normal align=center>0.02

normal align=center>0.03

normal align=center>0.03

normal align=center>白钨特-Ⅰ-3白钨特-Ⅰ-2白钨特-Ⅰ-1

normal align=center>72

normal align=center>70

normal align=center>70

normal align=center>0.4

normal align=center>0.5

normal align=center>0.6

normal align=center>0.03

normal align=center>0.05

normal align=center>0.10

normal align=center>0.05

normal align=center>0.07

normal align=center>0.10

normal align=center>0.010

normal align=center>0.015

normal align=center>0.020

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>0.3

normal align=center>0.4

normal align=center>0.5

normal align=center>0.15

normal align=center>0.20

normal align=center>0.25

normal align=center>0.10

normal align=center>0.15

normal align=center>0.20

normal align=center>2.0

normal align=center>3.0

normal align=center>3.0

normal align=center>2.0

normal align=center>2.0

normal align=center>3.0

normal align=center>0.1

normal align=center>0.1

normal align=center>0.2

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

normal align=center>—

注1、表中“—”者为杂质不限； 2、本标准不包括人造白钨，该产品另订标准执行；3、精矿中钽铌为有价元素，供方应报出分析数据；4、根据用户需要和资源特点，钨精矿中特级品可自订企业标准执行；5、黑钨精矿特级品I类产品中Sb，Bi，Pb的杂质要求和白钨精矿特级品Ⅱ类产品中Fe、Sb的杂质要求暂不作交货依据，但供方应报出数据