scholarly journals Technological characteristics of sulfide-magnetite ore washability at the magnetite skarn Peschanskoe deposit

2021 ◽  
pp. 45-56
Author(s):  
Sergei Mamonov ◽  
Keyword(s):  
Magnetic Separation ◽  
Mass Fraction ◽  
Research Result ◽  
Optical Microscope ◽  
Material Composition ◽  
Quantitative Chemical Analysis ◽  
Magnetic Separator ◽  
Ore Deposit ◽  
Magnetite Ore ◽  
Gold Silver

Introduction. In the magnetite lime-skarn Peschanskoe deposit, the Zapadno-Peschanskaya ore deposit is distinguished, which differs from other ore bodies by an increased content of copper and precious metals. Due to the fact that the technology of processing magnetite ores of the Peschanskoe deposit at the enterprise of the subsurface user is configured to receive only iron concentrate, the development of a comprehensive technology for processing sulfide-magnetite ores is an urgent task. Research aim is to study the material composition and sulfide-magnetite ore concentration of the ZapadnoPeschanskaya ore deposit and to develop a comprehensive technology for its processing. The technology should ensure gold-containing, copper and iron concentrates production. Research methods consisted in studying the material composition of sulfide-magnetite ore by means of quantitative chemical analysis using Arcos emission spectrometer with inductively coupled plasma, Solaar atomic absorption spectrometer, CS-800sulfur analyzer, Titration Excellence T-70 automatic titration system, and Specord 250 Plus scanning spectrophotometer; chemical phase analysis for the forms of iron, copper, gold, silver and sulfur compounds; mineralogical analysis using the Axio Imager A1m optical microscope and Mineral C7 automated analyzer. Technological research was carried out by various concentration methods: X-ray radiometric separation on the SRF1-100L separator; dry magnetic separation on the PBS-90/25 magnetic separator; gravity on the KC-MD3 centrifugal concentrator and the SKL-0.2 concentration table; flotation on the FMP-L series flotation machines; wet magnetic separation on the electromagnetic separator EBM-32/20. Scope of results. The present research result can be used at complex sulfide-magnetite ores processing. Conclusions. The results of the material composition research and technological properties of the sulfidemagnetite ore of the Zapadno-Peschanskaya deposit of the Peschanskoe skarnovo-magnetite deposit are presented. It is established that the researched ore can be efficiently processed using a complex gravityflotation-magnetic technology, which allows to obtain: gravity gold-containing concentrate with a mass fraction of gold of 50 g/t at recovery of 27%; copper concentrate with a mass fraction of 23.71%, gold – 18.9 g/t and silver – 60.0 g/t when extracted, respectively, 93.6%, 42.9% and 54.6%; magnetite concentrate with a mass fraction of iron 66.5%, sulfur 0.7% with the recovery of total iron 76.6%.

scholarly journals DRY MAGNETIC SEPARATION OF MAGNETITE ORES

2020 ◽  
Vol 17 (34) ◽  
pp. 700-710
Author(s):  
Kanat Sh CHOKIN ◽  
Abdraman I YEDILBAYEV ◽  
Baimurat A YEDILBAYEV ◽  
Vladimir D YUGAY
Keyword(s):  
Magnetic Separation ◽  
Experimental Studies ◽  
Magnetic Separator ◽  
New Model ◽  
Fine Grained ◽  
Magnetite Ore ◽  
Industrial Grade ◽  
Dry Magnetic Separation ◽  
Industrial Scheme ◽  
Dry Beneficiation

The relevance of the paper is that dry magnetic separation (DMS) is the main beneficiation method of magnetite ores. The lack of efficient industrial-grade machines and apparatus for separating fine-grained magnetite ores means that DMS is used mainly as a pre-concentration operation for fairly large classes. The aim of the research is to study the possibility of using a new magnetic separator model in the process of dry beneficiation of magnetite ore from the Bapy deposit. This paper presents theoretical and experimental studies of a new model of a magnetic separator. The mathematical modeling of the magnetic separation process of the device was carried out to evaluate the parameters in accordance with which a laboratory separator was subsequently manufactured. For the experimental study of the properties of this magnetic system, a laboratory magnetic separator was built. The possibility of using a new magnetic separator in the process of dry beneficiation of magnetite ore from the Bapy deposit was investigated. The industrial scheme being implemented consists in ore crushing and two stage dressing on dry drum magnetic separators. The study of beneficiation indicators of the magnetic separator was carried out using iron ore of the Bapy deposit, which is mono-mineral magnetite. For the study, mixtures of the minus 0.1 mm class were selected with the iron content α = 50% and α = 40%. As a result of the research, beneficiation indicators were obtained on a laboratory scale. Therefore, the improvement of the beneficiation scheme is reduced to the isolation of a small product and its subsequent beneficiation using a new model of magnetic separator. Thus, the presented magnetic separator is suitable for dry processing of crushed magnetite ore.

Enrichment of a Nigerian chromite ore for metallurgical application by dense medium flotation and magnetic separation

2019 ◽  
Vol 116 (3) ◽  
pp. 324 ◽  
Author(s):  
Kuranga Ibrahim Ayinla ◽  
Alafara Abdullahi Baba ◽  
Bankim Chandra Tripathy ◽  
Malay Kumar Ghosh ◽  
Rajan Kumar Dwari ◽  
...  
Keyword(s):  
Particle Size ◽  
Magnetic Separation ◽  
Organic Liquid ◽  
Size Fraction ◽  
Dense Medium ◽  
Chromium Alloy ◽  
Magnetic Separator ◽  
Electro Deposition ◽  
Chromite Ore ◽  
Wet Chemical

This study, focused on the beneficiation of a Nigerian complex chromite ore sourced from Tunga-Kaduka, Anka Local Government of Zamfara State, Nigeria, assaying 45.85% Cr2O4 and 54.15% mineral impurities, was enriched concurrently through sink floatation and magnetic separation techniques. The chromite ore initially analyzed to contain silicate impurities was found not suitable for metallurgical purposes. Thus, enrichment was examined through gravity separation studies using organic liquid with different specific gravities at 2.8, 3.3, and 4.0. The separation of chromite ore with lowest particle size fraction was done using Mozley mineral separator followed by the magnetic separation of the sink product by magnetic separator. The results obtained revealed about 77% of the total material containing 300 μm particle size, 52% ˂ 212 μm and 17% below 75 μm. Subsequent analysis of the beneficiated ore was carried out by wet chemical analysis and atomic absorption spectrophotometer. The results showed that Cr2O4 content increased to 78.34% from initial 45.83% with maximum Cr:Fe ratio of 3.2:1, representing 84.27% of chromium metal present in the ore. The enrichment of Cr2O4 obtained in this study could be found metallurgically applicable in the electro-deposition and ferro-chromium alloy production practices.

scholarly journals Evaluation of Magnetic Separation Efficiency on a Cassiterite-Bearing Skarn Ore by Means of Integrative SEM-Based Image and XRF–XRD Data Analysis

Minerals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 390 ◽  
Author(s):  
Markus Buchmann ◽  
Edgar Schach ◽  
Raimon Tolosana-Delgado ◽  
Thomas Leißner ◽  
Jennifer Astoveza ◽  
...  
Keyword(s):  
Magnetic Separation ◽  
Iron Oxides ◽  
Separation Efficiency ◽  
Analysis Data ◽  
Gangue Mineral ◽  
Data Partition ◽  
Local Regression ◽  
Separation Processes ◽  
Magnetic Separator

Image analysis data obtained from scanning electron microscopy provided data for a detailed evaluation of the separation efficiency for various processes involving the beneficiation of particulate materials. A dry magnetic separation by a drum type magnetic separator served as a case study to visualize effects of processing of a skarn ore with a high content of cassiterite as ore mineral (~4 wt%). For this material, iron oxides and silicates are the main gangue mineral groups. Based on the obtained data, partition curves were generated with the help of local regression. From the partition curves, the separation efficiency was evaluated and the relevant particle properties deduced. A detailed analysis of the bias of the quantitative mineralogical data is presented. This bias was monitored and further analyzed in detail. Thorough analysis of feed and products of magnetic separation enabled identification of the most important factors that control losses of cassiterite to the magnetic product, namely the association with iron oxides and particle sizes below ~40 µm. The introduced methodology is a general approach applicable for the optimization of different separation processes and is not limited to the presented case study.

A High-Gradient Magnetic Separation System for Separating Magnetic Nanobeads from Aqueous Solution

2012 ◽  
Vol 505 ◽  
pp. 39-43
Author(s):  
Xiao Fei Yan ◽  
Jian Han Lin ◽  
Rong Hui Wang ◽  
Mao Hua Wang ◽  
Dong An ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Magnetic Separation ◽  
Flow Rate ◽  
Separation System ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
High Gradient ◽  
Separation Time ◽  
Electronic Timer ◽  
Magnetic Nanobeads

Magnetic separation is an emerging and promising technology in biological sample preparation. In this paper, a high-intensity and high-gradient magnetic separation system was developed to separate magnetic nanobeads from aqueous solution. This system mainly consisted of a magnetic separator, a micropump and an electronic timer. The magnetic separator was designed by placing two columns of permanent magnets in an aluminum holder. Two magnets in each column were laid out in repelling mode and a hole between the two columns was used to accommodate a 1.5 ml tube. Working with the electronic timer, the micropump was employed to remove waste solution at a certain rate after magnetic nanobeads captured onto the sides of the tube wall. The experiments for separation of magnetic nanobeads with diameters of 150 nm and 50 nm using the developed magnetic separation system were conducted to optimize the key parameters of the system including nanobeads concentration, separation time and flow rate. The separation efficiencies of magnetic nanobeads increased as the nanobeads concentration and the separation time increased, whereas decreased when the flow rate was increased. Experimental results proved that the proposed magnetic separation system was able to separate magnetic nanobeads (diameters of 150 nm and 50 nm) with separation efficiencies of 99% and 90% in 30 min and 150 min respectively.

scholarly journals Magnetic Separation Research: A Survey of Some Activities in The Netherlands

1984 ◽  
Vol 1 (3) ◽  
pp. 123-138
Author(s):  
C. B. W. Kerkdijk ◽  
R. P. A. R. van Kleef ◽  
J. A. Roeterdink
Keyword(s):  
Magnetic Separation ◽  
Superconducting Magnets ◽  
Pilot Scale ◽  
Energy Research ◽  
Auxiliary Equipment ◽  
Magnetic Separator ◽  
High Gradient Magnetic Separation ◽  
Coal Cleaning ◽  
Research Organisations ◽  
The University

A survey of magnetic separation research at FDO Engineering consultants, the University of Nijmegen, and the Energy Research Foundation (ECN) will be given.FDO efforts were primarily on coal cleaning using the high gradient magnetic separation (HGMS) technique. The Institute for Materials of the University of Nijmegen performs fundamental studies on magnetic flocculation. A continuous flow magnetic separator is briefly described. The Energy Research Foundation has built and operates an HGMS–system with superconducting magnets. Auxiliary equipment enables the execution of well controlled HGMS pilot scale tests.Intensive contacts and cooperation exist between scientists of the 3 research organisations, and with other industries which are interested in magnetic separation applications.

scholarly journals DISCOVERY AND STUDY HISTORY POKROVSKY GOLD ORE DEPOSIT IN THE AMUR REGION

2020 ◽  
pp. 63-72
Author(s):  
ANTON VLADIMIROVICH MELNIKOV ◽  
◽  
VITALY ALEKSEEVICH STEPANOV ◽  
DMITRIY VALERYEVICH YUSUPOV ◽  
◽  
...  
Keyword(s):  
Native Gold ◽  
Amur Region ◽  
Near Surface ◽  
Ore Deposit ◽  
Gold Ore ◽  
Gold Silver ◽  
History Of ◽  
Typical Composition ◽  
Gold Ore Deposit

A brief history of the discovery and study of the large Pokrovsky gold ore deposit of the Amur Region, from the ores of which about 63 tons of gold were extracted, is given. The role of scientific and production organizations and individual geologists in the discovery of the deposit is shown. According to the results of almost half a century of research, the deposit is classified as a near-surface gold-silver formation with a typical composition of ores, near-ore metasomatites and native gold for deposits of this type. The closest analogue of Pokrovka is the Kubak deposit of the Omolonsky gold-silver province.

scholarly journals Increasing efficiency of iron ore magnetic separation by using ultrasonic technologies

2021 ◽  
Vol 280 ◽  
pp. 08004
Author(s):  
Vladimir Morkun ◽  
Natalia Morkun ◽  
Vitalii Tron ◽  
Vladimir Golik ◽  
Arkadii Davidkovich
Keyword(s):  
Magnetic Separation ◽  
Iron Ore ◽  
Structural Parameters ◽  
High Energy ◽  
Material Surface ◽  
Technological Parameters ◽  
Magnetic Separator ◽  
Ultrasonic Methods ◽  
Dispersed Particles ◽  
Enhance Efficiency

The research is aimed at solving the topical problem of enhancing efficiency of iron ore magnetic separation by applying ultrasonic technologies to identify optimal technological parameters of magnetic separation, improving controlled structural parameters of a magnetic separator and pretreating slurry by highenergy ultrasound to clean the ore material surface from fine-dispersed particles of minerals and slime, as well as disintegrate ore aggregates fed to the magnetic separator. The main tasks involve identifying regularities of influence of slurry pretreatment by high-energy ultrasound on properties of iron ore magnetic separation, determining regulations of improving technological and controlled structural parameters of the magnetic separator using ultrasonic methods, developing and substantiating methods to enhance efficiency of iron ore magnetic separation by applying ultrasonic technologies.

scholarly journals Investigation of the effect of several parameters on the applicability of magnetic separation method

2021 ◽  
pp. 69-73
Author(s):  
Tariq Al-Azab ◽  
Jamil Haddad ◽  
Fadi Alfaqs
Keyword(s):  
Magnetic Separation ◽  
Centrifugal Force ◽  
Magnetic Force ◽  
Separation Efficiency ◽  
Industrial Applications ◽  
Separation Process ◽  
Silica Sand ◽  
Sand Particle ◽  
Roll Speed ◽  
Magnetic Separator

Purpose. This research investigates the separation process performed by a magnetic separator. The magnetic separation process is used to isolate ferrous materials from those which are not. Hence, a prototype of a dry magnetic separator is designed. It should be said that this study defines the effect of different parameters (roll speed, magnetic force, and mass of silica sand particle) on separation efficiency. Methodology. The influence of several parameters of the magnetic separator such as magnetic force, centrifugal force, and properties of particle (mass, shape, etc.) were studied theoretically and simulated by SolidWorks software. The optimum conditions of the magnetic separator were obtained, and several trials were performed to find the point that results in a lower effect of roller speed and a higher effect of the magnetic force on the particle in order to achieve higher separating efficiency. Findings. The results show that the centrifugal force are the most important variable influencing separating efficiency. Moreover, it was found that blade angle magnitude of (174) degree with magnetic force between (1.71E-05 to 6.3E-05 N) and roll speed from (84 to 105 rpm) are the optimum separating conditions to reach higher rate of the separating process. Originality. This is the first time that the effect of the gap distance between the magnet and the feeding particles on the magnetic force has been studied. Furthermore, the effect of centrifugal force on magnetic separator force is investigated theoretically and numerically in order to be compared for different parameters. Practical value. The new prototype design of the magnetic separating unit is promising and efficient since the parameters can be varied based on the type and characteristics of materials. It is also revealed that separating time of the materials is reduced. Hence, this type of construction of a magnetic separator is recommended for industrial applications.

scholarly journals Effects of T6 Treatment, Tensile Temperature, and Mass Fraction of SiC on the Mechanical Properties of SiCp/6061Al Composites

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1602 ◽  
Author(s):  
Yong Hu ◽  
Tong Wu ◽  
Yue Guo ◽  
Wenyang Wang ◽  
Mingkai Song ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Mass Fraction ◽  
Tensile Tests ◽  
Optical Microscope ◽  
Hot Press ◽  
Service Environment ◽  
Mass Fractions ◽  
Hot Press Sintering ◽  
Properties Of Composites

SiCp/6061Al composites have been developed and widely applied in many fields, such as automobile, aerospace, shipping, and so on. Considering heat treatment, service environment, and strength of composites, this paper comprehensively studies the mechanical properties of SiCp/6061Al composites with a large range of SiC mass fractions under T6 treatments and different tensile temperatures. SiCp/6061Al composites were successfully prepared by hot press sintering at various SiC mass fractions (0–30%), and the influences of SiC concentration and T6 treatment on the mechanical properties of composites were characterized via tensile tests at room temperature, 100, and 200 °C. Microstructure and fracture surfaces of composites with various SiC concentrations were further analyzed by optical microscope and SEM. The formula for the biggest critical reinforcement concentration for the saturated distribution of SiC is proposed to reveal the strengthening rule of different SiC concentrations. Results show that the effect of T6 treatment on the mechanical properties of composites is a marked increase in tensile strength and an obvious decrease in elongation. The increase in the SiC mass fraction, except at 30%, is able to bring an increase in tensile strength and a decrease in elongation, and the change of the elongation is insignification in T6-treated specimens. The tensile strength of T6-treated specimens decreases as temperature increases, and the composite has a maximum elongation at 100 °C.

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