I think, the oxide lead mineral is cerussite. Review your mineralogical data. You need to determine the degree of oxidation. I mean, try to estimate the presence of galena and cerussite because you could need to flotation circuits, one to recover galena and other to try to recover cerussite. Try to recover both at the same time could be difficult.

To recover cerussite, you need to study the effect of Na2S or NaHS in the lead recovery. Several dosages such as 200, 400, 800 or 1200 g/t (may be higher additions). If the presence of iron oxides is significant ( your ore could be brown or a similar color), you need to evaluate the effect of some dispersants (e.g. sodium silicate, hexametaphosphate). The color could be SIPX and the frother MIBC.

It is necessary to perform rougher tests to evaluate the particle size and the effect of reagents. One more time, read your mineralogy data very carefully.

Dear Jorge

Thanks for your answer.

yes, the oxide lead mineral is cerussite and the presence of iron oxides is significant, I mean the ore color is brown and red.

I tested the effect of Na2S but the recovery was very low, about 15%.

I will send you the sample analysis.

You provided information on whole rock analysis. I did not find the lead grade. You added Na2S, but you did not mention the dosage. Sometimes, the addition of copper sulphate can be useful.

Three years ago, You made a similar question. What happened at that time?

Oxide Lead Flotation - Froth Flotation (Sulphide & Oxide) - Metallurgist & Mineral Processing Engineer (911metallurgist.com)

How to Process Oxidized Lead-Zinc Ore by Flotation (911metallurgist.com)

at the table the Lead grade mentioned that is 5.11 percent.

I added Na2S at the different dosage but i couldnt get the desired result.

Abaut the similar question in three years ago I can get the desired result and the recovery increase but that ore did not contain iron.

At that time, you did not provide all the information (e.g. K80, flowsheet), your position is understanding. Probably, to avoid to share many data, you should contact a met lab.