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Guidelines to Analysis of Electrodes Problems in EAF

Guidance To Analysis Of Electrodes Problems In EAF

Graphite electrodes are an important aspect of steelmaking.During this process,there are specific problems happened which hamper the efficacy of steelmaking.It is essential to have proper guidance for the analysis of graphite electrodes problems in steelmaking.

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Factors

Electrode Breakage

Nipple Breakage

Loosening

Tip Spalling

Bolt loss

Oxidation

Consumption

Nonconductor in charge

Heavy scrap in charge

Transformer capacity too large

Phase lm balance

Phase rotation

Excessive vibration

Clamp pressure much high low

roof electrode socket center not aligned with electrode

Water sprayed on electrodes above roof

Scrap preheating

Secondary voltage much high

Secondary current much high

Power factor very low

Oil consumption much high

Oxygen consumption much high

Long time gap from tapping to tapping

Electrode dipping

Dirty joint

Poorly maintained lift plug and tightening tool

Insufficient joint tightening

Note: □---Increased electrode performance;※---Decreased electrode performance.

Comprehensive guidance to analyze and solve graphite electrode problems will not only improve the efficacy of steelmaking but also increase productivity and profitability.

Graphite Electrode Recommended Joint Torque Chart

Electrode Diameter

Torque

Electrode Diameter

Torque

inch

mm

ft-lbs

N·m

inch

mm

ft-lbs

N·m

12

300

480

650

20

500

1850

2500

14

350

630

850

22

550

2570

3500

16

400

810

1100

24

600

2940

4000

18

450

1100

1500

28

700

4410

6000

Note: When connecting two poles of electrode, avoid over pressure for electrode and cause bad effect.Please refer to the rated torque in the above chart.

Post time: May-01-2023