Recovery of valuable metals from WPCB fines by centrifugal gravity separation and froth flotation

2021 ◽  
Author(s):  
Nazlım İlkyaz Dinç ◽  
Alper Umut Tosun ◽  
Esra Baştürkcü ◽  
Mustafa Özer ◽  
Fırat Burat
Keyword(s):  
Froth Flotation ◽  
Gravity Separation ◽  
Valuable Metals

scholarly journals Characterization and Economic Potential of Historic Tailings from Gravity Separation: Implications from a Mine Waste Dump (Pb-Ag) in the Harz Mountains Mining District, Germany

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 303 ◽  
Author(s):  
Kerstin Kuhn ◽  
Jeannet A. Meima
Keyword(s):  
Mine Waste ◽  
Froth Flotation ◽  
Economic Value ◽  
Gravity Separation ◽  
Mining District ◽  
Economic Potential ◽  
Waste Dump ◽  
Breakdown Spectroscopy ◽  
Mine Waste Dump ◽  
Drill Cores

In contrast to modern tailings from froth flotation, little is known about historic tailings from gravity separation. However, they may be of economic interest due to their higher metal grades compared to modern tailings. As an example for these types of historic tailings, the inner structure, as well as the economic potential (Pb, Zn, Cu, Ag, Sb), of the old Bergwerkswohlfahrt mine waste dump in Germany were studied. The investigations focused on textural, geochemical, and mineralogical properties. For this purpose, an extensive drilling program was undertaken. The drill cores were subsequently analyzed with a laser-induced breakdown spectroscopy (LIBS) core scanner to obtain the detailed spatial distribution of potentially valuable elements. The fine-sized residues could be differentiated into different layers, all of them including valuable metals in varying proportions. The strong variations in stratification and in metal distribution over short distances are caused by the batch-wise deposition of the tailings. This heterogeneity within short distances has to be taken into account for future exploration of these types of deposits. The application of a core scanner using LIBS is very convenient for detailed spatial analysis of drill cores, however, the calibration effort, particularly for heterogeneous sample material, is proportionally large. The valuable metal content for Bergwerkswohlfahrt was estimated to be 8000 metric tons of Pb and 610,000 ounces of Ag. Although of limited economic value, recycling might finance future remediation costs. Furthermore, the occurrence of historic tailings in nearby clusters may present further recycling opportunities.

scholarly journals Influence of Lead Nitrate on Sulfurizing Flotation of a Copper-Cobalt Oxide Ore

2021 ◽  
Vol 18 (10) ◽  
Author(s):  
Meschack Mukunga MUANDA ◽  
Pele Pascal Daniel OMALANGA
Keyword(s):  
Cobalt Oxide ◽  
Sodium Silicate ◽  
Froth Flotation ◽  
Lead Nitrate ◽  
Valuable Metals

Copper-cobalt oxide ores contain several minerals that are economically treatable by concentration techniques. The most used technique is froth flotation in which selective reagents are used to recover more valuables. It is, therefore, important to examine the optimal doses of those reagents while investigating the behaviors of minerals at the same time. This study explored the influence of lead nitrate Pb(NO3)2 on the froth flotation of oxide ore to increase valuable metals recoveries. Four factors were investigated including Pb(NO3)2 dosage, its conditioning, its addition dose in the 2nd fraction, and sulfidiser dosage. Other parameters were kept constant. The optimum was found at 25 g/t of Pb(NO3)2, conditioning together with sodium silicate (Na2SiO3) for 5 min, the addition of 5 g/t of Pb(NO3)2 in the 2nd fraction, and 3,000 g/t of sulfidiser.  Recoveries in concentrates were 79.51 % Copper (Cu) and 60.27 % Cobalt (Co), with grades of 9.49 and 0.67 %, respectively. The conclusion was that the use of Pb(NO3)2 can considerably improve copper and cobalt recoveries.

scholarly journals Possibilities of Tetrahedrite Separation from Polymetallic Ore

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Michal MARCIN ◽  
Martin SISOL ◽  
Peter VARGA ◽  
Ivan BREZÁNI ◽  
Michal MAŤAŠOVSKÝ ◽  
...  
Keyword(s):  
Froth Flotation ◽  
Gravity Separation ◽  
Shaking Table ◽  
Second Step ◽  
Flotation Column ◽  
Efficient Separation ◽  
Polymetallic Ore

Using the separation methods, the tetrahedrite concentrate, which contains multiple elements, was obtained from the tetrahedrite ore.We focused mainly on copper, but also on iron and antimony. Ore also contains undesirable elements such as arsenic or mercury. Theaim of this paper is an efficient separation of the utility components. Gravity separation and flotation was used. The first processingstep was gravity separation on shaking table the second step was froth flotation in flotation column.

scholarly journals Beneficiation of Talc-Magnesite Ore with Cu-Co Mineralization

2021 ◽  
Vol 1 (1) ◽  
Author(s):  
Ivan BREZÁNI ◽  
Martin SISOL ◽  
Michal MARCIN ◽  
Maroš SÝKORA ◽  
Michal MAŤAŠOVSKÝ ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Froth Flotation ◽  
Gravity Separation ◽  
Shaking Table ◽  
Raw Material ◽  
Electrostatic Separation ◽  
Accessory Minerals ◽  
Size Fractions ◽  
Preliminary Results ◽  
Flotation Cell

Magnesite ore with a low chalcopyrite – cobaltite mineralization was subjected to a series of separations designed to evaluate thepossible concentration of the two accessory minerals. Although the Cu-Co grade in the ore (> 0.01% Co, > 0.1% Cu) is significantlylower than the typical economic grades, content of the main valuable mineral for which the ore is mined and processed incombination with a listing of cobalt as a critical raw material, coupled with their higher price might compensate for the additionalbeneficiation stages. The ore was first crushed and subsequently classified to -100 μm and +100 -400 μm size fractions. The finefraction was upgraded by froth flotation processing in laboratory froth flotation cell. The coarser fraction was processed in severalseparation stages including gravity separation on shaking table, magnetic separation and corona electrostatic separation. The sameprocedure was also repeated with a higher-grade sample as a verification of the procedures. Preliminary results suggest that theaccessory minerals can be separated from the talc-magnesite ore and individual mineral concentrates with about 19% Co and 28%Cu were prepared. However, further work must be done to achieve desirable recoveries for the processing to be economically viable.

scholarly journals Integrating Flotation and Pyrometallurgy for Recovering Graphite and Valuable Metals from Battery Scrap

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 680 ◽  
Author(s):  
Ronja Ruismäki ◽  
Tommi Rinne ◽  
Anna Dańczak ◽  
Pekka Taskinen ◽  
Rodrigo Serna-Guerrero ◽  
...  
Keyword(s):  
Froth Flotation ◽  
Lithium Ion ◽  
Inert Atmosphere ◽  
Cleaning Process ◽  
Experimental Conditions ◽  
Rapid Reduction ◽  
Slag Cleaning ◽  
Novel Approach ◽  
Valuable Metals ◽  
Battery Scrap

Since the current volumes of collected end-of-life lithium ion batteries (LIBs) are low, one option to increase the feasibility of their recycling is to feed them to existing metals production processes. This work presents a novel approach to integrate froth flotation as a mechanical treatment to optimize the recovery of valuable metals from LIB scrap and minimize their loss in the nickel slag cleaning process. Additionally, the conventional reducing agent in slag cleaning, namely coke, is replaced with graphite contained in the LIB waste flotation products. Using proper conditioning procedures, froth flotation was able to recover up to 81.3% Co in active materials from a Cu-Al rich feed stream. A selected froth product was used as feed for nickel slag cleaning process, and the recovery of metals from a slag (80%)–froth fraction (20%) mixture was investigated in an inert atmosphere at 1350 °C and 1400 °C at varying reduction times. The experimental conditions in combination with the graphite allowed for a very rapid reduction. After 5 min reduction time, the valuable metals Co, Ni, and Cu were found to be distributed to the iron rich metal alloy, while the remaining fraction of Mn and Al present in the froth fraction was deported in the slag.

scholarly journals Concentration of bauxite fines via froth flotation

2009 ◽  
Vol 62 (3) ◽  
pp. 271-276 ◽  
Author(s):  
Renata Salles Kurusu ◽  
Arthur Pinto Chaves ◽  
Christian Fonseca de Andrade ◽  
Claret Antônio Vidal Abreu
Keyword(s):  
Magnetic Separation ◽  
Froth Flotation ◽  
Minas Gerais ◽  
The State ◽  
Gravity Separation ◽  
Processing Plant ◽  
Bench Scale ◽  
Processing Plants ◽  
Poços De Caldas ◽  
New Processing

Companhia Brasileira de Alumínio (CBA) has bauxite processing plants at Poços de Caldas and Itamarati de Minas, and a new processing plant at Miraí that has been operating since June, 2008; all of them are in the State of Minas Gerais. The plants haveunits for the crushing, scrubbing and screening operations. The screened oversize is the concentrate or washed bauxite. At Itamarati de Minas, the fines are de-slimed and concentrated by gravity separation of the iron-titanium minerals in Reichert spirals followed by HIWMS. The tailings still contain bauxite, which can be separated by reverse froth flotation (flotation of the quartz and depression of the bauxite), using starch as a depressant and amine as a promoter; the pH must be around 10.0. The iron and titanium bearing minerals are depressed with the bauxite and an additional magnetic separation operation is necessary on the depressed bauxite. This paper describes the work performed on Itamarati de Minas samples on a bench scale at Escola Politécnica, University of S. Paulo.

Mechanisms and kinetics of gravity separation of granular materials

2020 ◽  
Vol 63 (6) ◽  
pp. 545-561
Author(s):  
V N Dolgunin ◽  
A N Kudi ◽  
M A Tuev
Keyword(s):  
Granular Materials ◽  
Gravity Separation ◽  
Kinetics Of

Research of electro-gravity separation of grain

2019 ◽  
pp. 19-25
Author(s):  
S. Kovalyshyn ◽  
◽  
O. Shvets ◽  
V. Dadak ◽  
V. Ptashnyk ◽  
...  
Keyword(s):  
Gravity Separation

POTENTIALLY TOXIC CHEMICAL ELEMENTS OF SHALE PLAYS – ECOLOGICAL THREAT TO THE ENVIRONMENT

2020 ◽  
Author(s):  
Svetlana Punanova
Keyword(s):  
Chemical Elements ◽  
Organometallic Compounds ◽  
Cost Effective ◽  
Potentially Toxic Elements ◽  
Shale Oil ◽  
Toxic Chemical ◽  
Horizontal Drilling ◽  
Soil Layers ◽  
Valuable Metals ◽  
Economic Use

This research considered the content of trace elements (TE), including potentially toxic elements (PTE) in shale plays and deposits in various regions of the world. Their comparative analysis was carried out and the highest concentrations of PTE in the shales of some regions were revealed. The author notes that the destruction of organometallic compounds occurs during the development of shale hydrocarbon (HC) using horizontal drilling with hydraulic fracturing – injecting large volumes of chemicals while increasing the temperature. During such destruction processes, PTE can escape into the environment: into groundwater, soil layers, and other objects of economic use, and also deteriorate well equipment. In connection with the noted environmental hazards present during the development of shale HC, this paper proposes to monitor the content of TE in both shale rocks as well as in extracted shale oil in order to mitigate the risks of their release into the environment. In addition, developers and scientists should consider the losses of industrially significant volumes of valuable metals that occur due to the lack of cost-effective technologies for their capture and extraction from naphthides.

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