Removal of amorphous or partially dissolved silicon from aq. treatment soln. - by subjecting soln. collected in vessel to pressure-driven membrane filtration and returning silicon-free filtrate to treatment soln.

摘要

Amorphous and partially dissolved Si is removed from an aq. acid or alkali treatment soln. circulated for chemical treatment of Fe-Si alloy strip used for electrical purposes by subjecting soln. collected in a vessel to a pressure-driven membrane filtration and returning Si-free filtrate soln. to the treatment soln.. The Si-enriched soln. is returned to a storage vessel for treatment and disposal. ADVANTAGE - Used for rapid removal; no flocculating agent.