Various studies have been increasingly performed on the reduction of sulfur content of iron ores and concentrates. The presence of sulfur in these materials causes technical problems in steel and alloys and environmental issues in the sintering of iron ore process. The achievement of higher sulfur removal rates has been an important goal since the development of sulfur …

China is rich in total reserves of iron-containing mineral resources; however, the average grade of iron ore in China is not competitive with that in Australia and Brazil [19]. ... which was mainly beneficial to flotation desulfurization. And the fineness of second stage grinding was 90%–95% −44 μm, in order to meet the particle size ...

The reverse flotation of the iron ore with etheramine collector is significantly impacted when the iron-bearing silicates and the kaolinite are present in the silicates gangue mineral complex. This paper aims to propose a new amidoamine collector N-[3-(Dimethylamino)propyl]dodecanamide for iron ore reverse flotation with a potential of removing ...

In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or …

The contamination of sulfur emanating from pyrrhotite in magnetite concentrates has been a problem in iron ore processing. This study utilized froth flotation to float pyrrhotite away from magnetite using collectors of xanthate …

As the mainstreams of bauxite desulfurization technologies, the bauxite pre-desulfurization (roasting, electrochemistry, biology, flotation, etc) and Bayer process desulfurization (oxidation and ...

This study presents an experimental program performed to study the effects of flotation column variables including gas flow rate, froth depth, slurry solids percent, frother/collector dosage, …

This study presents an experimental program performed to investigate the effects of flotation variables including gas flow rate, froth depth, slurry solids percent, frother/collector dosage, and pH on the froth features such as bubble size, froth velocity, froth color and froth stability during desulfurization of an iron ore.

Most impurities are usually removed by cleaning and re-cleaning the concentrate. To investigate the feasibility of re-flotation, three flotation experiments were performed under … See more

In this study, the desulphurization of iron ore concentrate using reverse flotation was investigated. In this paper first, behavior of the flotation of both pure – pyrite and iron …

The reagents used in iron ore flotation, including starch, amines and fatty acids, and the mechanisms of their interactions with the minerals in iron ore are examined.

The content of sulfur in iron ore concentrate is the major problem of steel making industries. In this regard, the reverse flotation operation is used to reduce the amount of sulfur of the final ...

This paper reviews the industrial practices and fundamental research surrounding iron ore flotation. The advantages and disadvantages of direct flotation, cationic reverse …

The iron and steel industry is a pillar of the national economy and represents its degree of development [1].However, the insufficiency of high-quality iron ore resources seriously threatens the safety of the iron and steel industry [2].China, the world's largest iron ore consumer and steel producer, manufactured 1.018 billion tons of crude steel in 2022, about 53.93 % of …

Alternatively, the desulfurization of iron ores through flotation leads to a notable loss of valuable minerals. Efforts to enhance efficiency through collector mixtures (Yu et al., 2016) traduce environmental concerns, such as the use of compounds like …

demand in metallurgy industries [1]. Due to the depletion of high quality iron ores, complex ultrafine iron ores with a high content of impurities, such as sulfur, have been processed [2]. Pyrrhotite (Fe1 xS) is a kind of common sulfide which exists in magnetite ore as an associated mineral with little industrial value.

Keywords: high voltage electrical pulses, crushing, flotation, desulfurization, iron ore 1. Introduction In the last decades, due to the high consumption of iron ore in metallurgy industries, the demands for iron ore have been increasing (Saravari and Shayanfar, 2021). As the high-quality iron ores decrease over the years, impure iron-bearing ...

The achievement of higher sulfur removal rates has been an important goal since the development of sulfur removal techniques. In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or roasted iron ores.

In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur from iron ores, concentrates, or roasted iron ores.

Direct application of high-sulfur fuels and ores can cause environmental pollution (such as air pollution and acid rain) and, in serious cases, endanger human health and contribute to property damage. In the background of preserving the environment, microbial desulfurization technologies for high-sulfur fuels and ores are rapidly developed. This paper aims to reveal the …

Results in optimal conditions indicated that column flotation was considerably more efficient than mechanical flotation for iron ore desulfurization with the iron recovery of 98%. Summary Based on a central composite design (CCD), the effect of operational factors as flow rate, froth depth, slurry solids percent, frother/collector dosage, and ...

Fine particle flotation has been one of the main problems in many mineral processing plants. Beneficiation of iron ore and phosphate slimes is important from economic and environmental aspects. This study aimed at the purification of fine particles of iron and phosphate ores by a pilot scale flotation column (10.2 cm diameter and 400 cm height) in which Nano bubbles (NBs) …

Keywords: high voltage electrical pulses, crushing, flotation, desulfurization, iron ore 1. Introduction In the last decades, due to the high consumption of iron ore in metallurgy industries, the demands for iron ore have been increasing (Saravari and Shayanfar, 2021). As the high-quality iron ores decrease

3.4 Flotation desulfurization Flotation desulfurization is to use collectors to recover pyrite from bauxite [44âˆ'47]. The Ural Academy of Sciences of Soviet Union first adopted this method, in which sulfur content in the concentrate was found to drop from 2% to less than 0.41%, and the Al2O3 recovery was 99.17%.

Grinding process and fineness have been found as significant factors influencing the flotation desulfurization performance of high-sulfurous iron ore. Moreover, the separation tests of multi-stage grinding as well as direct one-stage fine grinding were conducted. ... (2005) 855â€"865. [7] A.C. Araujo, P.R.M. Viana, A.E.C. Peres, Reagents ...

The clean and efficient utilization of coal is a promising way to achieve carbon neutrality. Coking coal is a scarce resource and an important raw material in the steel industry. However, the presence of pyrite sulfur affects its clean utilization. Nonetheless, this pyrite could be removed using depressants during flotation. Commonly used organic depressants (sodium …

Desulfurization of hematitic concentrate of iron ore of the Gol-E-Gohar mine using reverse flotation method E. Panahi 1, A. Abdollahzadeh 2, A. Sam 3, M. Jahani 4, M. Yaghobi Moghaddam 4, A ...

Compared with other desulfurization technologies (e.g., flotation, bioleaching, and chemical leaching), which have problems such as process complexity or long cycle time or can only treat a single ore, 10,11,12,16,21 iron ore desulfurization by oxidative roasting is more direct, with more complete sulfur removal and greater industrial capacity ...

Fire accidents, caused by spontaneous combustion of sulfide ore, occur frequently in sulfur-containing metal mines. Fire accidents will lead to casualties and equipment damage, resulting in heavy losses of economy and mineral resources (Li et al., 2004, Rosenblum et al., 2017).When the sulfur content of the ore is 15–20% or more, the ore may spontaneously …

Alternatively, the desulfurization of iron ores through flotation leads to a notable loss of valuable minerals. Efforts to enhance efficiency through collector mixtures (Yu et al., …