pyrite flotation concentrate from kenya

Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO 3 - ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings

Can you list the factors affects the floatability of pyrite from refractory low grade ore. I used a Wemco lab flotation cell and aimed on analysing factors like collector dosages (PAX), Activator (Copper sulphate),MIBC , pH and others like pulp density and particle size (70 and 150 microns) .However how these factors affect the floatability of the pyrites from low grade refractory ore

The use of Pionera F-250 gives flotation recoveries similar to the use of cyanide as a pyrite depressant. For the mine, the replacement of cyanide as a pyrite depressant represents a significant change. It has been a long-term goal to reduce cyanide consumption, and the results from the herein described plant trial are the first step

Apr 01, 2014 · The rougher flotation concentrate was reground in a rod mill before cleaner flotation. It was found that chalcopyrite and chalcocite exhibited different flotation behavior and also affected pyrite flotation differently in cleaner flotation. The mechanism underpinning these phenomena was investigated by a range of techniques including the

Apr 13, 2016 · A copper-pyrite mill in Canada uses the 12-cell No. 21 “Sub-A” Flotation Machine, shown above, for roughing, and a 2-cell No. 21 “Sub-A” Flotation Machine for cleaning to produce a fairly coarse pyrite concentrate ranging from 50-62% minus 200 mesh. Feed at the rate of 230-240 tons per day comes from the tailings of a zinc flotation unit

Apr 10, 2015 · The separate pyrochlore flotation circuits for the coarse and fine fractions are identical. The final flotation concentrate has a grade of approximately 50–60% Nb 2 O 5, depending on whether the feed ore is from the Catalão I or II dome. The flotation concentrate from Catalão I ore is subjected to a hydrochloric leach to remove phosphates, a step which is not necessary when treating ore from Catalão

Flotation is at the heart of your mineral processing business. Trust it to someone who is committed to achieving the best performance at the lowest cost. Nalco Water offers a diverse portfolio of flotation programs, all of which are developed to overcome flotation process challenges encountered in a variety of metals and mineral operations

Jan 01, 2021 · 1. Introduction. In the mineral processing industry, lead-zinc sulfide ores are usually processed by froth flotation to enrich the purpose minerals .Flotation is a complex process, and the selective separation of minerals depends on the balance between the hydrophilic species and hydrophobic species on the mineral surface , .Mineral surface species are influenced by many factors

Evaluation of different depressants revealed that Pionera F-250 adequately depresses pyrite and allows for the use of an economical collector. This is an executive summary based on the scientific article “Improving plant performance at the Endeavor mine using Pionera F-250” by Vanegas, C, Sithole, M, Lauten, R A, 2021 Proceedings 15th

Pyrite is a major gangue mineral associated with galena and other valuable minerals, and it is necessary to selectively remove pyrite to upgrade the lead concentrate by froth flotation. In this study, the flotation experiments of a single mineral and mixed

Pyrite is removed from coal by a 2-stage froth flotation. In the 1st stage, coarse pyrite is removed as underflow in a conventional froth flotation operation. In the 2nd stage, the froth product from the 1st stage is subjected to froth flotation by using a coal flotation depressant and a pyrite flotation collector, thus removing most of the fine pyrite

The Bureau of Mines two-stage coal-pyrite flotation process was modified to provide a more concentrated final clean coal slurry underflow that could be dewatered economically by filtration or centrifugation. This was accomplished by doing the first-stage coal flotation step in the conventional manner with a slurry of about 8 percent solids but running the second-stage pyrite flotation step

Results are presented on the flotation of chalcopyrite from a chalcopyrite-galena bulk concentrate high in pyrite using dextrin as a depressant for galena and pyrite at pH 8

May 27, 2016 · The selective sulfidation of lead smelter slag with pyrite in the presence of carbon and Na salts, and the flotation behavior of synthetic ZnS were studied. The effects of temperature, time, pyrite dosage, Na salts, and carbon additions were investigated based on thermodynamic calculation, and correspondingly, the growth mechanism of ZnS particles was studied at high temperatures

Jul 18, 2013 · Results are presented on the flotation of chalcopyrite from a chalcopyrite-galena bulk concentrate high in pyrite using dextrin as a depressant for galena and pyrite at pH 8. On a étudié l'adsorption des ions tant de dextrine que de xanthate aux interfaces pyrite/solution aqueuse et galène/solution aqueuse par des essais d'adsorption en lot

Dec 01, 2020 · Flotation tailings are mainly produced from sulfide metal mining, were in the flotation process the flotation of pyrite is suppressed by alkaline pH, so that the pyrite ends in the tailings, where it is a the end the principal responsible mineral for the formation of AMD through the sulfide oxidation process (Dold, 2010; McGregor et al., 1998)

Nov 15, 2017 · A gold flotation plant floats pyrite to recover the gold locked in the pyrite. The concentrate is leached to recover gold. The volume of concentrate needs to be reduced to increase leach residence time. Quartz was found to be the main gangue mineral, was well sized and liberated. Changing the frother gave a more mobile drainable froth and

Jun 01, 2021 · Thirty-seven years of mining and processing of Cu-porphyry ore has been resulting in the production more than 540 million tons of waste tailings in Sarcheshmeh industrial complex, Iran's largest Cu producer. The main objective of this study is to evaluate the changes that occurred in the trace elements content of Sarcheshmeh mine tailings during the flotation desulfurization process

The role of copper sulphate in pyrite flotation. The role of copper sulphate in the flotation of pyrite has been studied. A survey of a number of pyrite flotation plants using copper sulphate showed that in correct dosages it was able to increase both grades and recoveries. This was confirmed in batch tests

The invention discloses a flotation separation method of antimony sulfide and gold-bearing pyrite. Sodium hexametaphosphate is adopted as a dispersing agent, sodium silicate is used as a silicon and calcium gangue inhibitor, copper sulfate is used as an antimony and gold mineral activating agent, butyl xanthate is used as a collecting agent, and No. 2 oil is used as a foaming agent, so that