The lead zinc sulphide flotation process is traditionally done by flotation of lead, followed by flotation of zinc, followed by flotation of sulfur, or flotation of lead, followed by flotation of zinc, followed by flotation of sulfur.
Due to different grades of raw ore, the mineral floatability is also different; particle size varies with the impurity content; The pharmaceutical schemes are also quite different, and the technical indicators obtained are also different.
Tanzanian customers invited Dasen mining to visit the lead-zinc ore concentrator last year for technical improvement. After four years of operation, the concentrator has a lead recovery rate of 80%, a grade of zinc concentrate of 43%, and no batch of qualified products have been produced, all of which are pressed in the ore bin.
As a result, Dasen mining engineers found the following reason: the grade of lead-zinc raw ore is relatively low, but galena and sphalerite have obvious mineral properties and a clear MINERAL CLEAVAGE interface, so better economic and technical indicators should be obtained.
According to the process flow of the plant, the grinding fineness is 88% minus 200 mesh. Lead flotation is normal, lead concentrate grade is excellent, and zinc flotation is normal, but the secondary fine foam is sparse and the color is light. According to the analysis of various situations, the engineer concluded that there was a process that was not handled properly, so he asked the customer to increase the dosage of a reagent.
With the adjustment of mining engineer Dasen, the recovery rate of lead reached more than 85%, the grade of zinc concentrate reached more than 57%, and other indicators remained virtually unchanged. All low-grade zinc concentrates in the original inventory are sold together after two months of production. Even the smallest technological errors will have a big impact!
Share your experiences:
Marmatite flotation: theoretically, the zinc concentration grade of marmatite is lower than 45%. The zinc concentration grade of marmatite produced by a large number of concentrators is also less than 45%, which is relatively at a loss in price. According to Dasen mining, most marmatite is not 100% marmatite, so he has conducted countless flotation experiments on marmatite to solve this mystery. It turns out that if we meet this requirement, we can get qualified zinc concentrates containing more than 45% zinc.
We will have professional technicians solve the problem for you.