Pyroflux 105, 105YH, 125
Slightly Exothermic Fast Reacting "Black Dross" Cover and Drossing Flux for Aluminium Alloys
An excellent fast reacting flux for the majority of alloys, both wrought and cast.
Characterized as a “black dross,” it is unique in aiding an operator to determine if the flux has sufficiently released the good metallic back into the bath where it should remain, as opposed to becoming caught up in a gray dross which makes it more difficult for the operator to discern between free-metallics and oxides. To take advantage of its exothermic properties, this flux must be thoroughly mixed into the dross to allow reaction with "wet" dross for release the free metallics, separating metal from the dross to precipitate removal resulting in a dry black dross.
Temperature Range
- It is a fast-reacting flux in the 1300˚F (704˚C) and higher temperature range.
Flux Features
- Primarily designed as a slightly exothermic drossing flux to react with "wet" dross for release the free metallics, separating metal from the dross to precipitate removal.
- Successfully used as a cover flux to put a protective barrier between the surface of the metal and the atmosphere, significantly preventing loss of good metallics to oxidation.
- Performs equally well in crucible-type furnaces and in furnaces where the dross is treated in charging or skimming wells.
- Not designed for injection with a commercial injection system.
- Do not subject these blends to direct flame impingement as unacceptable levels of smoke may occur.
Physical Properties and Blend Variations
- Pyroflux 105 is a white powder flux containing sodium chloride, potassium chloride, potassium silicofluoride and sodium carbonate.
- Pyroflux 105YH and 125 are beige-white powder fluxes containing sodium chloride, potassium chloride, calcium fluoride and sodium carbonate.
- These fluxes contain the addition of sodium carbonate to assist in producing a dry dross.
- Pyroflux 105YH is blended as an economical Pyroflux 105 containing calcium fluoride instead of potassium silicofluoride, and it is also slightly higher in sodium chloride than the Pyroflux 105.
- Pyroflux 125 is blended for a specific alloy to be slightly more active.
Quality castings begin with proper fluxing practices. Contact your Pyrotek Sales Engineer to determine the appropriate flux for your operation. 866-Pyrotek (866-797-6835)
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