Unused SJ601 surrounding the weld may often be recovered, but recycling must not introduce moisture, slag, metal particles or foreign flux into production.
Which Flux Can Be Recovered?
Only clean and unfused particles should be considered. The recovery system must remove:
- Solid slag fragments
- Weld-metal particles
- Rust and scale
- Oil and grease
- Foreign flux grades
- Excessive dust
- Moist or visibly degraded material
Why Is Screening Important?
Repeated handling can change particle distribution and create fines. Screening helps remove oversized slag and excessive fine material that could affect delivery and coverage.
Can Recovered Flux Be Used Without New Flux?
There is no universal recycling ratio. The permitted proportion depends on product formulation, recovery equipment, contamination level, particle degradation and quality requirements.
Many production systems blend recovered material with new flux under a controlled procedure.
Recommended Recycling Controls
- Use dedicated recovery equipment.
- Screen collected flux.
- Remove metal particles when necessary.
- Store recovered material in sealed containers.
- Define the new-to-recovered mixing ratio.
- Prevent different flux grades from mixing.
- Monitor weld appearance and quality.
- Discard contaminated material promptly.
When Should Flux Be Discarded?
Do not reuse flux exposed to oil, water, uncontrolled outdoor storage, heavy pulverization or unknown product mixing.
Controlled recycling can reduce waste and consumption, but it must never compromise weld quality.
