Anodes for magnesium electrolytic cells

Graphite anodes and bars are used in the magnesium industry.

 

 

 

Properties

Units of measurement

Typical values

Grade

 

BV

BN

Specific electrical resistance

µОhm·m

6.5

5.5

Compression strength

MPa

25

34

Flexural strength

MPa

14

17

Bulk density

g/cm3

1.65

1.76

Real density

g/cm3

2.24

2.24

Total porosity

%

25

21

Open porosity

%

22

14

Heat conductivity at 20°C

W/m•K

130

190

Linear thermal expansion coefficient, (20-520) °C

10-6 •K-1

2.4

2.3

Ash content

%

0.2

0.2

 

The above values are average values and they do not constitute a specification.

BV is a grade of bars, recommended preferably for use in top-mounted anodes;
BN is a grade of bars, recommended preferably for use in bottom-mounted anodes.



 

 

Maximum dimensions, mm

Standard tolerances, mm

Width

330

375

412

340

±5*
±2**

Height

150

200

±5*
±2**

Length

2250

+50*
±5**

 

 

 

* - partial machining;

** - full machining.

 

Anodes are complete with commercially produced bars 330 mm, 375 mm and 412 mm wide  with the maximum anode width of 2246 mm. Standard tolerance on the width of the anode depends on the number of the bars. 

 

Protection of top-mounted anodes against air oxidation is ensured by impregnation of a current-conducting part of the anode with metaphosphate melts and other compounds. 

 

Anodes can be supplied in a set together with the bars or glued. 

 

The chief expert in anodes for magnesium industry and electrode pastes can be reached at  chedrekie@ukrgrafit.com.ua.