Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)

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we have a problem in lead flotation (1 reply)

7 months ago
mardin 7 months ago

dear friends, we have a problem in the recovery of lead in flotation plant. our feed  consists of oxide minerals, and we have a lot of froth in our cells especially in the rougher. the froth is poor, that means its density is low, and recovery is low most of the time. we recover solphide minerals at 9.5 pH and in next stages we increase pH up to 11.5 to recover oxide minerals. this procedure increased our recovery from 50 to 65-70, however it still is low. we use pax and pex as well as na2s, na2sio3, and mibc. the feed grade is about 3 percent. I would be grateful if you share your experiences and suggestions with us.

7 months ago
Jorge 7 months ago

If the ore is partially oxidized, it is important to determine what lead oxide minerals are in the ore. A mineralogical study is very useful to know it. The addition of Na2S is useful to promote the floatability of cerussite, but if there is a significant proportion of anglesite, the addition of Na2S would not be very useful, I mean, the recovery of lead oxide minerals would be difficult. Other think to consider is the efficiency of the sulphidization process, the air required to operate a flotation cell tends to promote the oxidation of Na2S. The presence of clays is other factor to analyze.

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