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

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.

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

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.

Experimental Study on Flotation Process Conditions of Lead-Zinc Ore

2012 ◽  
Vol 454 ◽  
pp. 183-188
Author(s):  
Ming Ming Li ◽  
Qi Dong Zhang
Keyword(s):  
Experimental Study ◽  
Experimental Studies ◽  
Process Conditions ◽  
Good Separation ◽  
Zinc Recovery ◽  
Flotation Process ◽  
Lead Recovery ◽  
Lead Zinc ◽  
Concentrate Grade ◽  
Zinc Concentrate

On the basis of analyzing sample properties of lead-zinc ore, the optimum experimental condition combination was obtained from systematic experimental studies of the conditions. The experimental condition combination was validated by the full process closed-circuit experiment, which showed that the good separation indexes on lead grade of 59.78% in lead concentrates, the lead recovery of 87.50%, and zinc concentrate grade of 56.33%, the zinc recovery of 93.60%, and sulfur concentrate contained 0.50% of lead, 0.47% of zinc.

scholarly journals Extraction of Lead and Zinc from a Rotary Kiln Oxidizing Roasting Cinder

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 465 ◽  
Author(s):  
Junhui Xiao ◽  
Kai Zou ◽  
Wei Ding ◽  
Yang Peng ◽  
Tao Chen
Keyword(s):  
Sulfuric Acid ◽  
Rotary Kiln ◽  
Lead Oxide ◽  
Acid Leaching ◽  
Chemical Compounds ◽  
Shaking Table ◽  
Lead And Zinc ◽  
Lead Recovery ◽  
Solid Liquid ◽  
Acid Dosage

In this study, sulfuric acid leaching and gravity shaking-table separation by shaking a table are used to extract lead and zinc from a Pb-Zn oxidizing roasting cinder. The oxidizing roasting cinder—containing 16.9% Pb, 30.5% Zn, 10.3% Fe and 25.1% S—was obtained from a Pb-Zn sulfide ore in the Hanyuan area of China by a flotation-rotary kiln oxidizing roasting process. Anglesite and lead oxide were the main Pb-bearing minerals, while zinc sulfate, zinc oxide and zinc ferrite were the main Zn-bearing minerals. The results show that a part of lead contained in lead oxide is transformed to anglesite, and a 3PbO·PbSO4·H2O-dominated new lead mineral phase after acid leaching. A zinc leaching efficiency of 96.7% was obtained under the leaching conditions used: a leaching temperature of 55 °C; a leaching time of 90 min; a sulfuric acid dosage of 20%; a sulfurous acid dosage of 4%; a cinder particle size of <0.3 mm; and a solid-liquid ratio of R = 1:4. After the gravity shaking-table separation, a lead concentrate with 50.2% Pb, 2.33% Zn and lead recovery of 86.0% was produced. The main chemical compounds in leaching residue are anglesite, 3PbO·PbSO4·H2O, SiO2 and ZnFe2O4, while the main chemical compounds in lead concentrate are anglesite, 3PbO·PbSO4·H2O and SiO2.

Recovery Pb, Zn and S from a Chinese Lead-Zinc Mine Beneficiation Plant Tailing

2014 ◽  
Vol 997 ◽  
pp. 583-586
Author(s):  
Yong Chen ◽  
Yong Sheng Song ◽  
Gui Ying Zhou ◽  
Wen Juan Li
Keyword(s):  
Magnetic Susceptibility ◽  
Size Analysis ◽  
Mineral Analysis ◽  
Beneficiation Plant ◽  
Mineral Liberation ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
Zinc Mine ◽  
Characterisation Techniques ◽  
Zinc Concentrate

Detailed characterisation and recovery of galena, sphalerite, and pyrrhotite from the beneficiation plant tailing of YouXi, China, was investigated. Different characterisation techniques viz. size analysis, chemical analysis, mineral analysis by Mineral Liberation Analyser（MLA）were carried out. Based on the appreciable differences in specific gravity, floatability and magnetic susceptibility between the desired lead, zinc, sulphur minerals and the gangue minerals, the flow sheets comprising desliming, flotation and magnetic separation, was used to recover galena, sphalerite, and pyrrhotite values. A lead and zinc concentrate of Pb 16.02%, Zn 35.1% and sulphur concentrate assays 35% S and 56% Fe can be produced from the tailing.

Study on Recovery of Lead-Zinc Tailing Ore by Electrochemical Flotation

2014 ◽  
Vol 675-677 ◽  
pp. 1451-1454 ◽  
Author(s):  
Gui Ying Zhou ◽  
Wen Juan Li ◽  
Yong Chen ◽  
Yong Sheng Song
Keyword(s):  
Potential Range ◽  
Low Grade ◽  
Separation Potential ◽  
Potential Control ◽  
Iron Sulfur ◽  
Lead And Zinc ◽  
High Oxidation ◽  
Lead Zinc ◽  
Pulp Potential ◽  
Zinc Concentrate

The tailing in a large lead-zinc-iron-sulfur multi-metallic mine has rich reservation in variety of metallic minerals. It has been difficult to recover because of all kinds of reasons. The challenges faced by lead-zinc ore beneficiation are, low grade and recovery of lead and zinc concentrate for fine disseminated grain size, high oxidation rate and close intergrowth. This paper presents a Pulp Potential Control Flotation by stages technique to improve the flotation performance of the lead-zinc ores. In the electrochemical potential controlling flotation processing, using DDTC as collector, the separation potential range of galena and sphalerite with pyrrhotite can be achieved. Flotation circuit of lead-zinc-silver tailing ore was achieved.

Processing of the lead-zinc ore from the Pavlovsk deposit

2020 ◽  
pp. 33-39
Author(s):  
S. S. Plyasovitsa ◽  
◽  
O. A. Kravtsova ◽  
N. V. Ivanova ◽  
I. Yu. Semenov ◽  
...  
Keyword(s):  
Metal Concentration ◽  
High Quality ◽  
Valuable Component ◽  
Flotation Process ◽  
X Ray ◽  
Lead And Zinc ◽  
Mineralogical Study ◽  
Lead Zinc ◽  
Zinc Concentrate

The authors carried out a mineralogical study and substantiated a concentration process developed for the lead-zinc ores of the Pavlovsk deposit. The concentration of the valuable component in each type of concentrate is determined by the amount of pyrite contained in the ore. It was established that the main loss of lead with flotation tailings is associated with oxidized phases, which are mainly found in fine material. Lead sulphides account for 30% of the entire waste tailings. Using the results of the mineralogical study, a flotation process was developed that involves a staged separation of commercial lead and zinc concentrates, as well as waste tailings. The obtained zinc concentrate has a consistently high quality of 57–58% with an 85–90% recovery. The metal concentration in the lead concentrate 1 is 45%, with the recovery being 43%. On the basis of the experimental results, the authors propose to use an X-ray radiometric separation method for coarse ore, which will help reduce the amount of incoming ore by 30% while minimizing the loss of lead and zinc.

Experimental Research of Mineral Processing on a Certain Lead-Zinc Oxidize Ore

2013 ◽  
Vol 669 ◽  
pp. 34-38
Author(s):  
Wen Deng ◽  
Hui Zhao ◽  
Deng Bang Jiang ◽  
Yao Zhong Lan
Keyword(s):  
Zinc Oxide ◽  
Experimental Research ◽  
Mineral Processing ◽  
Metallic Lead ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
Zinc Concentrate

A certain multi-metallic lead-zinc oxide ore contains 1.09%Pb，8.39%Zn． The oxide rate of lead and zinc is 96.34% and 98.15% respectively．In order to recover valuable minerals from the oxide ore comprehensively, the authors adopted priority flotation processing in this experimental research. At last, the lead concentrate with Pb grade of 27.41% and the zinc concentrate with Zn grade of 24.14 % were respectively achieved. The overall recovery of lead was 93.66%，and the overall recovery of zinc was 90.74%.

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

2021 ◽  
Vol 2 (3) ◽  
pp. 239-247
Author(s):  
Ivan A. Konovalov
Keyword(s):  
Liquid Interface ◽  
Zinc Recovery ◽  
Lead And Zinc ◽  
Surface Active Properties ◽  
Physical Form ◽  
Lead Zinc ◽  
Surface Active ◽  
Flotation Performance

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.

Study on the New Flotation Agent Regime for Sichuan Lead-Zinc Mine

2012 ◽  
Vol 549 ◽  
pp. 513-518
Author(s):  
Xiao Lin Zhang ◽  
Jian Jun Fang ◽  
Dian Wen Liu ◽  
Shu Qin Zeng
Keyword(s):  
Zinc Oxide ◽  
Particle Distribution ◽  
Low Grade ◽  
Mineral Particle ◽  
Test Results ◽  
Lead And Zinc ◽  
High Efficient ◽  
Lead Zinc ◽  
Zinc Mine ◽  
Zinc Concentrate

Ore samples, collected from a lead-zinc oxide ore deposit in Sichuan province, China, are very difficult to treat with such characteristics as low grade, uneven mineral particle distribution and high containing of slime. It is very difficult to separate the lead minerals and zinc minerals, especially for the recovery of zinc oxide minerals. On the basis of flotation characteristics study to gangue and useful minerals, author studied flotation behavior of lead-zinc oxide ore with new collectors (KM21 and YO-1), and carried out the experiment on separating useful minerals from gangue minerals. Test results showed, a lead concentrate with a grade of 59.78 percent and a recovery of 86.49 percent and a zinc concentrate with a grade of 48.53 percent and a recovery of 84.92 percent were obtained from the crude ore with the oxidation rate of 74.34 percent and 89.30 percent of lead and zinc respectively, which realized the high efficient flotation separation of the refractory lead-zinc oxide ores.

Flotation Separation of High Sulfur Lead-Zinc Ore

2012 ◽  
Vol 454 ◽  
pp. 205-209 ◽  
Author(s):  
Zhi Tao Yuan ◽  
Xiao Long Yu ◽  
Li Ping Liu ◽  
Cheng Liang Wang
Keyword(s):  
Experimental Studies ◽  
Closed Circuit ◽  
Test Results ◽  
Flotation Reagent ◽  
Flotation Reagents ◽  
Selective Flotation ◽  
Different Types ◽  
Lead Zinc ◽  
Process Flowsheets ◽  
Zinc Concentrate

According to the refractory lead-zinc ore properties with high pyrite, the experimental studies were conducted on floatation reagent conditions and closed circuit tests for comprehensive recovering of all types useful minerals. In comparison to the test results of different process flowsheets and different types of flotation reagents, adopting prior flotation lead (Pb)—Zn selective flotation (reagent removal and regrinding of rough concentrate)—S-selective flotation with Zn-tailings. The closed circuit tests were achieved: the grade of lead concentrate was 50.55% with a recovery of 92.25%; The grade of zinc concentrate was 40.12% with a recovery of 85.82%; The grade of sulfur was 48.58% with a recovery of 56.59%; The tailings grades of lead, zinc and sulfur were 0.27%, 0.31%, 3.90% respectively.

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