FLOTATION OF LEAD-ZINC ORE USING A MIXTURE OF DITHIOCARBAMATE AND XANTHATE

The collecting capacity of xanthate, dithiocarbamate and their combination was studied. The effect of activity with respect to the gas-liquid interface of derivative forms of reagents represented by physically sorbed forms of collector was considered. Flotation experiments of lead-zinc ore from the Gorevsky deposit showed an increase in flotation performance when using reagent combinations. The use of a collector with pronounced chemisorbable properties in combination with a reagent having surface-active properties towards the gas-liquid interface caused an increase in the recovery of useful component. It was determined that activity of the physical form of sorption affects the selectivity of lead and zinc recovery - as activity of the physically sorbed form of reagent decreases, the selectivity of recovery grows.

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Critical importance of pH and collector type on the flotation of sphalerite and galena from a low-grade lead–zinc ore

Scientific Reports ◽

10.1038/s41598-021-82759-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Abdolrahim Foroutan ◽

Majid Abbas Zadeh Haji Abadi ◽

Yaser Kianinia ◽

Mahdi Ghadiri

Keyword(s):

Iron Ore ◽

Low Grade ◽

Zinc Recovery ◽

Flotation Process ◽

Ph Values ◽

Lead And Zinc ◽

Optimum Ph ◽

Iron And Zinc ◽

Lead Zinc ◽

Zinc Concentrate

AbstractCollector type and pulp pH play an important role in the lead–zinc ore flotation process. In the current study, the effect of pulp pH and the collector type parameters on the galena and sphalerite flotation from a complex lead–zinc–iron ore was investigated. The ethyl xanthate and Aero 3418 collectors were used for lead flotation and Aero 3477 and amyl xanthate for zinc flotation. It was found that maximum lead grade could be achieved by using Aero 3418 as collector at pH 8. Also, iron and zinc recoveries and grades were increased in the lead concentrate at lower pH which caused zinc recovery reduction in the zinc concentrate and decrease the lead grade concentrate. Furthermore, the results showed that the maximum zinc grade and recovery of 42.9% and 76.7% were achieved at pH 6 in the presence of Aero 3477 as collector. For both collectors at pH 5, Zinc recovery was increased around 2–3%; however, the iron recovery was also increased at this pH which reduced the zinc concentrate quality. Finally, pH 8 and pH 6 were selected as optimum pH values for lead and zinc flotation circuits, respectively.

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Influence of the Addition of Depressants during Grinding on Lead-Zinc Separation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.554-556.420 ◽

2012 ◽

Vol 554-556 ◽

pp. 420-424

Author(s):

Rong Dong Deng ◽

Quan Jun Liu ◽

Ting Hu ◽

Feng Hong Ye

Keyword(s):

Dissolved Oxygen ◽

Separation Efficiency ◽

Size Analysis ◽

Lead And Zinc ◽

Lead Zinc ◽

Flotation Performance ◽

Pulp Potential

The flotation performance of a complex lead and zinc ore were investigated by changing the grinding environments. Four groups of testing were conducted with different depressants or their combinations. Flotation results, size-by-size analysis, pulp potential (Eh) and dissolved oxygen (D0) were studied. It was found that the addition of depressants during grinding was beneficial to increasing the separation efficiency.

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A Novel Combined Flowsheet of Beneficiation and Acid Leaching under High Pressure for Complex Lead-Zinc Ores

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.92.13 ◽

2010 ◽

Vol 92 ◽

pp. 13-21

Author(s):

Han Ping Zhang ◽

Xiao Li Wang ◽

Xu Ming Wang ◽

Sheng Jian ◽

Qun Zhao

Keyword(s):

High Pressure ◽

Acid Leaching ◽

Zinc Recovery ◽

Selective Flotation ◽

Lead And Zinc ◽

Lead Recovery ◽

Lead Zinc ◽

Tail Water ◽

The Cost ◽

Zinc Concentrate

The run-of-mine of complex lead-zinc ores in Yunnan contains 3.26% lead and 2.54% zinc. When traditional selective flotation flowsheet was adopted, 3.77% yield and 61.92% grade of lead concentrate as well as 5.65% yield and 38.67% grade of zinc concentrate were achieved. Simultaneously, 72.39％ lead recovery and 3.83% zinc grade in lead concentrate as well as 80.64% zinc recovery and 6.39% lead grade in zinc concentrate were obtained. Lead concentrate and zinc concentrate obtained from selective flotation contain each other severely, resulting in low recovery of lead and zinc and severe loss of metal, which influences subsequent smelting flowsheet. In addition, due to requirement of large amount of depressant and activator while separating lead and zinc in the process of mineral processing, the cost is very high and the compositions of tail water which can not be recycled by the plant are very complicated. For the combined flowsheet of beneficiation and metallurgy, bulk flotation flowsheet was adopted. Therefore, 11.22% yield of combined lead and zinc concentrate with 25.55% lead grade, 18.33% zinc grade and 86.36% lead recovery were obtained. Gravity separation technology was utilized to separate combined concentrate of lead and zinc. After selecting out part of high quality lead concentrate, the remaining combined concentrate of lead and zinc was treated by acid leaching under high pressure. The final leaching efficiency of zinc was able to reach 97%. The new combined flowsheet has lots of advantages such as shorter flowsheet of beneficiation, simpler reagents, more direct reuse of backwater and higher recovery of metals.

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