The current methods of desulfurization of ore include chemical, physicochemical, and thermal methods, flotation, and bioleaching [6]. It is an urgent need of finding a green, efficient, and low-cost technological method to reduce the sulfur content in iron concentrates.
The nature of hematite depression with corn starch in the reverse flotation of iron ore. J. Colloid Interface Sci. 524, 337–349 (2018).
The Desulfurization of Magnetite Ore by Flotation with a Mixture of Xanthate and Dixanthogen Jun Yu, Yingyong Ge * and Xinwei Cai ... However, in the practice of iron ore flotation, the loss of valuable mineral in tailings is the major problem confronting the iron ore industry. Thus, the reagent suit is formulated ...
The results in optimal conditions indicated that column flotation was considerably efficient for iron ore desulfurization so that a high purity concentrate with the sulfur content of 0.08 % and ...
Twenty‐three strains capable of oxidizing iron were isolated from coal and ore storage sites as well as coal and ore mines, volcanic areas, and hot spring. ... Bacterial treatment was applied to column flotation. An increase of cell density in the microbial column flotation resulted in the increase of pyrite removal from a coal‐pyrite ...
They were subjected to flotation tests on a laboratory and industrial scale. In addition, the properties of pellets produced before and after desulfurization by flotation were investigated. The results showed that using flotation, iron and sulfur grades changed from 66.08% and 1.12%, to 68.3% and 0.33%, respectively.
The results in optimal conditions indicated that column flotation was considerably efficient for iron ore desulfurization so that a high purity concentrate with the sulfur content of 0.08 % and ...
Magnetite (Fe3O4) is an iron ore mineral that is globally mined especially for steel production. It is denser (5.15 g/cm3) than Earth's crust (~2.7 g/cm3) and is expected to accumulate at the ...
In this research, an effort is made to separately introduce the various processes, industrial practices, and fundamental research activities to remove sulfur …
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 …
The desulfurization of iron ore concentrate by the column flotation process is highly nonlinear and complicated [34]. The main objective of the current study was to combine image analysis methods ...
1. Introduction. 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 …
Iron ore desulfurization is the process of removing sulfur from iron ore that contains sulfur compounds. ... Magnetic separation-flotation combined desulfurization and iron separation process. The magnetite currently selected in China contains a large amount of pyrrhotite and pyrite due to its fine particle size, which makes the negative impact ...
Among the iron bearing minerals, pyrite decreased from 35.93 to 3.21%, and hematite increased from 31.95 to 80.75%. ... the flotation desulfurization technology for handling high sulfur bauxite is relatively mature, ... The ore sample that cannot pass the 20 mesh sieve is returned to the grinding prototype for further grinding and the above ...
The effect of flotation for desulfurizing the iron pelletizing feed has been investigated. The flotation method can reduce the emission of harmful environmental …
Request PDF | Evaluation of column flotation froth behavior by image analysis: effects of operational factors in desulfurization of iron ore concentrate | Flotation performance is expected to be ...
Mine tailings, the byproduct of mining and mineral processing, are increasingly mass produced as a result of increased demand for metals and minerals as well as the advancement in technology that allows for the exploitation of lower-grade ores. Lower grades can increase the volume of tailings that may contain new gangue minerals …
In iron ore beneficiation, froth flotation is employed to selectively separate the desired iron minerals from gangue minerals or other impurities. Chemical Beneficiation: Chemical processes can be …
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 ...
In this study, a novel method for simultaneously improving desulfurization of iron ore and lowering SO 2 emission in flue gas at low temperature by microwave roasting of the ore with the addition of urea was proposed. The results showed that the desulfurization percentage of iron ore increased significantly with lower SO 2 emission …
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
In iron ore desulfurization industry, this process depends on the ability of bubbles to selectively adhere to sulfidic minerals and then remove this mineral (minerals) by being …
This paper investigates the circuit design of polymetallic ores, including desulfurization within the flotation process.
It was also examined that a high desulfurization ratio was achieved with little loss of magnetite when mixture of xanthate and dixanthogen was used as collector. ... The adverse effect of slimes in iron ore flotation is the heterocoagulation of ultrafine quartz particles with coarser hematite particles and vice versa [148, 149].
This study presents an experimental program performed to investigate the effects of flotation variables including gas flow rate, froth depth, slurry solids percent, …
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. ... Beneficiation tests Two kinds of experimental schemes for the …
The proper feed for the pelletizing plant must have iron and the Blaine number more than 67 % and 1900 cm 2 g -1 and sulfur content less than 0.1 %, respectively. In this work, the feasibility study of desulfurization process for iron ore used in the pelletizing plant was carried out in the fourth line of the Gol-e-Gohar Complex. Two methods were examined …
Flotation desulfurization refers to the separation of sulfide from ore according to the different properties of sulfur in the flotation reagents (Lin et al. 2020). Magnetic separation desulfurization is the removal of sulfur from coal by high gradient strong magnetic separation (Zhang et al. 2018). However, the effect of physical ...
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 …
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 ...
The reverse flotation of pyrite particles was used for desulfurization of the iron ore for two reasons. Firstly, the amount of pyrite is significantly less when …
The reverse flotation of pyrite particles was used for desulfurization of the iron ore for two reasons. Firstly, the amount of pyrite is significantly less when comparing the magnetite in the iron ore sample. Secondly, Pyrite is more hydrophobic and can be easily floated using xanthate collectors.
The advantages and disadvantages of direct flotation, cationic reverse flotation, and anionic reverse flotation are reviewed. A novel stepped flotation technique is discussed for the treatment of carbonate-rich iron ores.
