بررسي كاهش اكسيدآهن در سيليس معدن قرمزآباد به روش فلوتاسيون

The quality of silica used in glass industry effects the quality of product in a great deal. Presence of iron oxide causes different colors in glass and therefore is considered as an impurity. In this article ways for iron oxide reduction has been evaluated for the silica originated from Ghermez Abad mine using flotation. Flotation tests were designed either as direct or reverse and different collectors were applied either individually or collectively. Results showed that a dual collector system and pulp pH around 2-2.5 presents the optimum conditions. Increasing the conditioning time did not affect the iron oxide reduction process. For over 6 minutes it even showed an adverse effect as increasing the conditioning time from 6 to 9 minutes increased the iron oxide grade from 0.022% to 0.0238%. The optimum solid percentage was also found to be at 30%. Frother type and additional collector concentration did not lower iron oxide grade.