Calcined Bauxite welding grade block material
Welding grade bauxite has tight regulation on presence of sulfur andphosphorus which are detrimental to the weld. When present
at high concentrations, they induce porosity and cracking, and at lower concentrations, they adversely affect the impact strength of
the weld. And moisture for welding grade bauxite should not exceed 0.5% because the potential for any moisture present withthin
the flux to reduce to hydrogent, if exposed to a welding arc, the molten weld pool absorbs the hydrogen and will induce brittleness
into the weld.
Application of Welding grade calcined bauxite:
Welding fluxes are a small but valuable market for calcined bauxite. Techniques for submerged arc welding require the use of a
granular flux to shield the molten weld pool rom the atmosphere during the weld’s application or pacement. Various proprietary
compositions exist and in some cases calcined bauxite is incorportated into these formulations. Calcined bauxite may, in some
instances, make up to 25% of the welding flux.
Typical data of welding grade calcined bauxite:
Item | YZCBW-87 | YZCBW-85 | YZCBW-83 |
Al2O3(%) | 87.0min | 85.0min | 83.0min |
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