Fluxing resuspends the alloy components which come to the surface, and at the same time removes the contaminants which have been formed or released by the melting process.
I have never heard of using kitty litter for this purpose, it is clay. This might bind the contaminants, but I don't see how it will resuspend separated alloy components.
I for many years just used a few reject bullets which had been lubed with the Alox-beeswax lube. Plain beeswax would work OK also, but is expensive. Toss in the bullets, stir, and skim off the contaminants. You should have a clean shiny molten alloy left.
Hope this helps, Walt
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