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Two-ring high purity graphite crucible for melting precious metalsTwo-ring high purity graphite crucible for melting precious metals

The precious metal smelting is divided into roughing and refining. High purity precious metals are obtained by smelting low purity precious metals. The graphite crucible used in refining need high requirement to the purity, bulk density, porosity, strength and other indicators. The material is isostatic pressure or molded graphite with three dipping and four baking. The processing requirements are very strict, not only the size of accurate, but also the surface polishing.

Description

Our graphite material is strictly tested and carefully selected to ensure that it can matched with the power, the heating effect is the best, and the processing technology must meet the design requirements.

Application

Melting precious metal such as: gold, silver and platinum.

Parameter

Mark

Volume Density

Electrical Resistivity

Thermal Conductivity           (100℃)

Coefficient of Thermal Expansion  (Indoor Tempreture -600℃)

Shore Hardness

Bending Strength

Compressive Strength

Porosity

Purified Ash

particle size

g/cm³

μΩm

W/m﹒k

10-6/℃

HSD

Mpa

Mpa

%

PPM

μm

jl-4

1.8

8~11

121.1

5.46

42

38

65

17

10

13~15

jl-5

1.85

8~10

139.2

4.75

48

46

85

13

10

13~15

Red-5

1.68

13

90

5

51

38

86

18

10

13~15

jl-10

1.75

12~14

85

5.5

56

41

85

16

10

12

jlh-6

1.90

8~9

140

5.1

53

55

95

11

10

8~10

jl-7

1.85

11~13

85

5.6

65

51

115

12

10

8~10

jl-8

1.93

11~13

85

5.85

70

60

135

11

10

8~10


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