·For the single mineral flotation test malachite 2 g and deionized water at the required concentration for the test were placed in the cell The reagents were added in sequence and allowed to react for a period of time Copper lead zinc ore was used to prepare the copper oxide samples and the original sample was screened
·This test was performed using the XFG II flotation machine at an available cell of 40 mL and the rotation speed of 1600 r/min was used in the malachite flotation test Before the experiment a malachite sample 2 g was placed in a flotation tank and 35 mL of ultrapure water was added for slurry mixing
·The flotation performance of malachite was examined through flotation tests conducted using the XFG II flotation machine located in Jilin China The flotation tank had a volume of 40 mL The stirring speed remained constant at 1500 r/min and 2 g of mineral samples were precisely measured and introduced into 40 mL of deionized water
·The effect of calcite on malachite sulfidization flotation was investigated by micro flotation tests adsorption sedimentation and zeta potential test The micro flotation results showed that the finer the calcite particles size is the lower the malachite recovery will be in the sulfidization flotation of malachite at around pH
·The flotation test results showed that TMT exhibited superior activation performance over sodium sulfide achieving a high flotation recovery rate of % at TMT 90 mg/L and pH 7 The results revealed that direct flotation of malachite yielded a recovery rate below 20 % After activation with 90 mg/L sodium sulfide the flotation
·Based on the flotation test the maximum recovery of malachite sulfidization flotation was reached at pH 9 Under this condition Cu 2 complexes mostly remained as Cu II OH complexes in the absence of NH 3 During malachite flotation Cu II OH complexes reacted with S II complexes to form colloidal copper sulfide which hindered the
·The flotation test of real ore contained these two minerals further confirmed that the malachite could be separated from calcite using PX as the collector The mechanism and characterization analysis show that the selective substitution reaction between xanthate ions and OH ions on the malachite surface could generate hydrophobic substances of
·For each test a fresh batch of ore was mixed with tap water in the flotation cell with the water level adjusted to a set height Flotation using OHA at elevated temperatures was detrimental to malachite flotation Slight reductions in both the recovery and rate of recovery of quartz were observed however a significant decrease in
all the test processes Intensity / Malachite PDF No 41 1390 Fig 1 XRD pattern of malachite samples Micro flotation experiments Flotation was conducted in a 40 mL XFG II micro flota tion machine A malachite sample 2 g with particle sizes of 38 74 μm was used during the micro flotation test A CuSO4
·In a single mineral micro flotation test g of malachite or calcite samples as mentioned in Section were placed into a 50 mL beaker and then 30 mL distilled water was added Later the beaker containing these samples was put in an ultrasonic bath for 3 min to clean the mineral surface After that the upper clear liquid was removed
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