low grade concentrate

However, utilization of low-grade mineral has many problems because it is more complex than the standard concentrate. In this study, the oxidation behaviors of powdery rhenium-bearing low-grade molybdenum concentrate were investigated through thermodynamic calculation, roasting experiments, thermogravimetric analysis, …

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 …

concentrate is reground and not the whole ore as was the case in ... a major transformation from high-grade low-bulk ores to low-grade high-bulk ores is necessary to secure the future supply chain ...

Ammonia leaching is a promising method for processing low-grade copper ores, especially those containing large amounts of oxidized copper. In this paper, we study the effect of Si-containing …

Low-grade copper concentrates (with copper content less than 20%) often contain impurities such as arsenic, zinc, lead, mercury, antimony and bismuth. The …

The effects of Ca-based additives on roasting properties of low-grade molybdenum concentrate were studied. The results show that calcium-based additives can react with molybdenum concentrate to form CaSO 4 and CaMoO 4.The initial oxidation temperature of MoS 2 is 450 °C, while the formation of CaMoO 4 and CaSO 4 occurs …

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 …

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 …

For low-grade iron ore separation, it is very important to develop an optimized flow sheet to achieve the best iron concentrate grade and iron recovery while keeping the cost as …

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 …

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 …

In recent years, a low-grade vanadiferous titanomagnetite concentrate (LVTC) produced in the northwest area of Liaoning has attracted more and more attention. However, it is difficult to recover and utilize valuable minerals such as iron, titanium, and vanadium, due to their special physical and chemical properties and complex mineral …

Low-grade bismuth-lead concentrate was used as the raw material. The chemical composition of the concentrate was analyzed by inductively coupled …

This complexity includes lower grade ore, lower grade concentrates, and increases in the concentration of minor metals …

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 ...

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 ...

The low-grade colemanite concentrate was comminuted to size fractions of -1 mm, -0.5 mm, and -0.15 mm before treatment in the Knelson Concentrator. The effects of particle size, fluidizing water ...

Low grade ores – Smelt, leach or concentrate? T.Norgate, S.Jahanshahi. Show more. Add to Mendeley. https://doi/10.1016/j.mineng.2009.10.002Get rights and content. Abstract. Metallic ore grades are falling globally as the higher grade reserves …

The river basin ilmenite concentrate is low grade and contains 27.02% TiO 2 and 60.62% Fe 2 O 3 t, composed of ilmenite, hemo-ilmenite, ilmeno-hematite, and some locked grains of gangue minerals. The titanium product prepared from river basin ilmenite by direct hydrometallurgical processing showed 95.61% TiO 2, 3.81% Fe 2 O 3 t, and …

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.

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 ...

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 …

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 …

To produce desirable sinter products required by the blast furnace smelting process, sintering tests of ore mixtures made from a low grade South African chromite concentrate (Cr 2 O 3 /FeO = 1.99) and Chinese magnetite concentrate were performed in a sinter pot in terms of various sintering parameters including coke dosage, mix …

Bulk ore sorting is a preconcentration technique that may address the operational and environmental challenges of extracting low …

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.

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.

Abstract. The aim of the present work was to perform copper, nickel, and platinum group metals (PGMs) recovery from low-grade copper–nickel concentrate containing pyrrhotite, pentlandite, and …