The solvent extraction separation of bismuth and molybdenum from a low
The main purpose of this study was to characterize and to extract bismuth and molybdenum from a low grade bismuth glance concentrate. Selective leaching of bismuth could be obtained at a temperature range 60 to 85 °C for a leaching duration of 2 h with hydrochloric acid concentration of 150 gpl, lignin calcium concentration of 0.02 gpl …
Oxidation kinetics of a low-grade vanadiferous …
In order to better develop and utilize the low-grade vanadiferous titanomagnetite concentrate with high titanium (LVCHT) and provide reference for the treatment of similar minerals. Oxidation process and kinetics of the LVCHT were investigated in this study. The results show that LVCHT presents weight loss at …
Kinetics of the Oxidative Roasting of Low Grade …
The similar trends were also obtained at other temperatures considered in this research. Kinetic analysis of the TGA data obtained after the oxidative roasting of the natural low grade molybdenite concentrate at the temperature range of 778 K to 823 K was done in order to interpret the mechanism of the oxidative. 0.8.
A conceptual flowsheet for heap leaching of platinum
This is the case at Western Platinum Limited (WPL) where the concentrator plant produces, as a by-product, a low-grade concentrate from the secondary cleaning circuit containing up to 29 g/t of platinum group metal (PGMs), 0.36% copper and 0.74% nickel and less than 0.5% S. In the case of UG2 ores, this low-grade concentrate is …
Efficient extraction of tungsten, calcium, and phosphorus from low …
For example, the Luanchuan mine in China has a W reserve of up to 620,000 tonnes. After the flotation process, the obtained low-grade scheelite concentrate contained WO 3 10–30%, Mo 2–5%, and P 2 O 5 10–30%, and regarded as a low-grade phosphate concentrates (Wei et al., 2012, Kang et al., 2018).
LOW-GRADE STOCKPILE TREATMENT
STEINERT. Mining. Low-grade stockpile treatment. LOW-GRADE STOCKPILE TREATMENT. Intelligent low-grade stockpile treatment with ore sorting. We have the solutions for turning low-grade stockpiles into …
Processing of low grade zinnwaldite (lithium mica) concentrate …
@article{osti_372088, title = {Processing of low grade zinnwaldite (lithium mica) concentrate}, author = {Alex, P and Suri, A K}, abstractNote = {Zinnwaldite, lithium bearing mica, is obtained as one of the byproduct during the beneficiation of wolframite ore of Degana (Rajasthan). It contains about 0.29 to 0.6% lithium, and some amounts of …
An integrated approach for production of stainless
As an alternative process, the production of stainless steel master alloys in blast furnace (BF) exhibits high economic efficiency and great potential to use low-grade chromite resources. To produce desirable sinter products required by the blast furnace smelting process, sintering tests of ore mixtures made from a low grade South African …
(PDF) Low grade ores – Smelt, leach or concentrate?
Bulk ore sorting is a preconcentration technique that may address the operational and environmental challenges of extracting low …
Extraction of Metals from Nickel Concentrate by Low
The high-grade concentrate used in this work was obtained by flotation of low-grade nickel ore from Jinchuan Group, Gansu Province, China. All chemical reagents used in the experiments were analytical grade purchased from the Tianjin Chemical Reagent plant (China). The main chemical composition of the concentrate is shown in …
Dissolution of low-grade chalcopyrite concentrate in …
A high level of copper recovery (96%) from low-grade chalcopyrite concentrate was obtained under a total pressure of 6 atm at 120 °C within 2 h when using small amounts of nitrite species due to their autocatalytic behavior in acidic solutions. Elemental sulfur was the primary leaching product on the mineral surface, as confirmed …
Low-Grade Copper Concentrate Purification and …
Low-grade copper concentrates (with copper content less than 20%) often contain impurities such as arsenic, zinc, lead, mercury, antimony and bismuth. The …
(PDF) Chemical processing of a low grade molybdenite concentrate …
In India, a low grade molybdenum sulphide concentrate containing 25–30% molybdenum is recovered as a by-product of uranium operations at Jaduguda. This concentrate contains a high association of ...
Current Status of Copper-Ore Processing: A Review
The final copper concentrate produced contains 25.1% copper with 86% recovery. The Mikheevskii MPE, producing 18 million t of porphyry copper ore per year (at a grade of 0.4% cop-per), applies the bulk-differential flowsheet and pro-duces copper and molybdenum concentrates. The flo-tation feed is the tertiary grinding overflow of 80% passing ...
Studies on Processing of Low Grade Indian Molybdenum Sulphide Concentrate
In India, a low grade molybdenum sulphide concentrate containing 25–30% molybdenum is recovered as a by-product of uranium operations at Jaduguda. This concentrate contains a high association of copper and nickel. If it is processed by the conventional route, both copper and nickel would decrease molybdenum recovery. Such …
Oxidation kinetics of a low-grade vanadiferous …
A vanadium-titanium magnetite concentrate with 1.14% V2O5, 22.22% TiO2, 42.51% Fe and a rough concentrate of ilmenite with 16.05% TiO2, 20.77% Fe were obtained from low-grade vanadium-titanium ...
Study on selective reduction and magnetic separation of low-grade
grade concentrate from low grade laterite ore which is a refractory nickel resources and hard to bene fi ciate by traditional processes. During the roasting the reduction of iron minerals was ...
Efficient extraction of tungsten, calcium, and phosphorus from low …
For example, the Luanchuan mine in China has a W reserve of up to 620,000 tonnes. After the flotation process, the obtained low-grade scheelite concentrate contained WO 3 10–30%, Mo 2–5%, and P 2 O 5 10–30%, and regarded as a low-grade phosphate concentrates (Wei et al., 2012, Kang et al., 2018). In general, to obtain high …
Autoclave Ammonia Leaching of Silver from Low-Grade …
Explore all metrics. Autoclave ammonia leaching of silver from low-grade copper concentrates is studied with use of Zhezkazgan concentrates of the following composition, %: 9.55 Cu, Fe 4.84, S 5.6, 27.03 Si, 109.6 g/ton Ag. According to X-ray phase analysis the main minerals present in the concentrate are, %: 29 quartz (SiO …
Effective bioleaching of low-grade copper ores: Insights from microbial
The low-grade ores were attacked by the generated protons, which was generally accepted as indirect mechanism, leading to a positive correlation with copper release. ... The shift of microbial community under the adjustment of initial and processing pH during bioleaching of chalcopyrite concentrate by moderate thermophiles. Bioresour. …
(PDF) A conceptual flowsheet for heap leaching of
the low-grade concentrate streams will be processed as follows: A heap bioleach run for 60 da ys or more to achieve the highest possible ex traction of the BMs.
Prospects for involvement of low-grade molybdenum and …
The expediency of involving low-grade concentrates and middlings in metallurgical processing is substantiated. The possibility of efficient processing of low-grade molybdenite (15–20% Mo) and scheelite (7–10% WO 3) concentrates by hydrometallurgical and combined methods (with a preliminary roasting of scheelite …
Extraction of vanadium from low-vanadium grade magnetite concentrate
This study reported the extraction of vanadium from low-vanadium grade magnetite concentrate pellets using sodium salt. 71.1% of vanadium can be extracted under the following optimal conditions: pelletizing with 5 wt% Na 2 CO 3, preheating at 1050 °C for 10 min, roasting at 1250 °C for 10 min, and water leaching at 120 °C for 120 min …
Recovery of Tungsten and Molybdenum from Low-Grade Scheelite
With most high-quality tungsten ores being exhausted, the enhancement of low-grade scheelite concentrates processing has attracted a great deal of attention. The objective of this study is to develop a method to maximize the recovery tungsten and molybdenum from a low-grade scheelite via a new acid leaching process followed by …
Effect of noble metal element on microstructure and NO2 …
The X-ray Fluorescence spectrometry (XRF) and X-ray diffraction (XRD) were performed to determine the chemical compositions of the low-grade scheelite concentrate before the experiments, and the corresponding results are illustrated in Table 1 and Fig. 1, respectively.It can be observed from Table 1 that the main valuable …
An Efficient Technology for Smelting Low Grade …
Low-grade bismuth-lead concentrate was used as the raw material. The chemical composition of the concentrate was analyzed by inductively coupled …
Ppb-level NO2 sensing properties of Au-doped WO3
The low-grade scheelite concentrate was used as the tungsten source for the synthesis of pure and Au-doped WO 3 nanosheets. The loose and irregular WO 3 nanosheets with a single monoclinic structure were 10–30 nm in thicknesses and several hundreds of nanometers in lengths and widths.
Extraction of Gold from a Low-Grade Double Refractory …
The treatment process of a low-grade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work. The gold extraction of this ore by all-sliming cyanidation was only 11.75%. ... A concentrate containing 34.08g/t of gold with the gold recovery ratio of 81.20% was obtained by flotation. After roasting ...
Study for Preparation of Industrial Ammonium Molybdate from Low Grade
As the material was low grade molybdenum concentrate, in addition, more talc and calcite were also contained. In order to make the molybdenum concentrate fully roasted and oxidized, MnO 2 was chosen as the oxidant. The influences of roasting temperature, roasting time and the quantity of oxidant were studied in this experiment to …
Efficient extraction of tungsten, calcium, and phosphorus from low …
The tungsten trioxide (WO3) grade of concentrate based on HDDA can reach to 65% at pH 7, which is obviously larger than that when sodium oleate is used (40%), which is in accordance with the ...