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 ...

The developed flowsheet for processing of low-grade concentrates will utilize 80% of the existing equipment of the Balkhash Zinc Plant, thus leading to a significant reduction in required capital ...

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.

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 …

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 …

The leaching of a low-grade and complex rare earth concentrate was discassed.Rare earth and beryllium(Be) can be easily leached by using traditional concentrated sulfuric acid calcinating at low temperature,the leaching rates of rare earth and beryllium(Be) can reach respectively above 95% and 90%,but the leaching rates of Ta and Nb are only about …

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).

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 …

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 …

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. …

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 …

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

In the present work, we studied the two-stage process, which included stages of biological and chemical leaching, to improve copper extraction from low grade Cu–Zn sulfide concentrate containing …

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 …

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 …

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 ...

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 …

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 …

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 …

Low-grade copper concentrates (with copper content less than 20%) often contain impurities such as arsenic, zinc, lead, mercury, antimony and bismuth. The pyrometallurgical treatment of such concentrates is associated with several problems, which will ultimately affect the cost and the quality of copper cathodes as well as by-products.

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 …

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 …

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

@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 …

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 ...

For a low-grade nickel concentrate, such as that used in this study, a significant fraction of the sulfide is associated with iron. Assuming each of nickel, cobalt and copper is associated with sulfide with ratio 1:1, which here is a good approximation given the identities the base metal sulfide minerals, ~87% of the sulfide was estimated to be ...

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 …

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.

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 ...

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 …