Vale is the largest iron ore producer in the world. Since the 1970s, Vale has been using reverse cationic flotation to remove siliceous impurities from its iron ores. Whilst this flotation process has operated effectively for many years, it suffers from the problems of high reagent costs and high metal loss.In 2010, CSIRO investigated the use of a …
In nature, in addition to a few minerals such as graphite, sulfur, and other minerals having good natural floatability. Most of the minerals are naturally hydrophilic, in order to achieve the effect of flotation separation and purification. ... Cao Z., Zhang Y., and Cao Y. studied the reverse flotation of quartz in magnetite with modified ...
At present, reverse flotation is one of the most effective ways to achieve desulfurization of low-grade bauxite [5]. Nowadays, the common reverse flotation collector in desulfurization of high-sulfur bauxite is xanthate, but it has unstable chemical properties, weak selectivity and some neurotoxicity [6]. In addition, it will decompose under ...
Reverse flotation reduces the Blaine number of the pelletizing feed due to the removal of fine clay particles.. Decreasing the sulfur content of the pelletizing feed, led to an increase in the cooking speed (5%) and the compressive strength (13%) of the pellets.. Prior desulfurization reduces the residual FeO (2%) in the pellets, with less …
F Nakhaei, Sulfur content reduction of iron concentrate by reverse flotation, Energy sources. Part A, Recovery, utilization, с. 1 J Liu, Effect of acidic activators on the flotation of oxidized pyrrhotite, Miner.
Moreover, acid leaching and reverse flotation by using mixing barrel, flotation column, and flotation machine had also reduced the sulfur content of pyrite from 0.5% to 0.01% [13]. However, in the ...
The content of sulfur in iron ore concentrate is the major problem of steel making industries. In this paper, the reverse column flotation operation is used to reduce the amount of sulfur of the ...
When snow water was used as a flotation medium, it was found that a concentrate containing 3.01% total sulfur and 27.64% ash with a total sulfur reduction of 57.06% was obtained from a feed ...
Application of magnetic separation and reverse anionic flotation to concentrate fine particles of iron ore with high sulfur content. The sulfur content in iron ore causes technical problems in the process of sintering iron ore in steel and alloys, and environmental problems in discharging the tailing.
The reverse froth flotation process was applied to remove silicon and aluminum impurities from the iron ore using dodecyltrimethylammonium bromide (DTAB) and dodecylamine acetate (DAA) cationic ...
The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite can lead to excessive particle entrainment, increase of froth, and low separation efficiency. ... Hu et al. researched the phosphate effection on the reverse flotation …
The selective mining activities have generated a huge quantity of poor grade coal that is rich in mineral matter and sulfur content and has piled up in whole mining site at Lakhra. This highly oxidized and mineral matter rich …
@article{Liu2019ANM, title={A novel method for desulfurization and purification of fluorite concentrate using acid leaching and reverse flotation of sulfide}, author={Hang Liu and Sultan Ahmed Khoso and Wei Sun and Yangge Zhu and Hai-sheng Han and Yue-hua Hu and Jianhua Kang and Xiangsong Meng and Qingpeng Zhang}, journal={Journal of …
Abstract. This paper proposes a new method to improve the reverse flotation performance of magnetite ore using a pulse magnetic field. Flotation tests were performed in a flotation column with six ...
Reverse flotation separation of talc from molybdenite without addition of depressant: Effect of surface oxidation by thermal pre-treatment ... ABSTRACT The depression of pyrite in the flotation separation of molybdenum-sulfur (Mo-S) mixed concentrate has become a significant issue. This study aimed to examine the process of …
Good experimental results were obtained as follows: the iron grade increased to 57.17%, iron recovery was 89.94%, sulfur content decreased from 0.66% to 0.26%, reverse flotation of sulfur concentrate contained almost 15.68% sulfur, the upgrade ratio was about 23, and the cobalt in the sulfur concentrate was enriched 20-fold.
The results of flotation test provide optimum reverse flotation conditions of high-sulfur bauxite. Finally, the most suitable regime of agent in the roughing stage is: grinding fine ne ss of -0 ...
Firstly, it was used as a flotation collector for reverse flotation of silicates and sulfur from diaspore-type high-sulfur and high silicon bauxite. Results demonstrated that maximum Al2O3 ...
Phosphate ore is an important strategic mineral resource. The efficient utilization of phosphate resources faces challenges such as low grade of raw ore and difficulty in discharging gangue minerals. One of the key problems to be solved urgently in the reverse flotation of phosphate ore is the effective depression of apatite. However, …
Irannajad, 2018). This method can be categorized as direct anionic flotation of iron oxides and reverse anionic or cationic flotation of associated gangue minerals, mainly quartz, and sulfur. Reverse cationic flotation is the most common method used for the flotation of gangue minerals, mainly quartz while
The removal of gangue minerals containing major elements was investigated using a reverse flotation method. Experiments were conducted on lignite samples, with high-ash and low-sulphur contents taken from a lignite field in Karlıova–Derinçay (Bingöl), Turkey. Predominant gangue minerals in the samples were …
The performance of the reverse flotation of iron ores is largely governed by the interactions between the operational variables, which are complex. The prediction of the amount of sulfur removal in the reverse flotation of iron ore concentrate is an important issue to enhance the process efficiency. When the sulfur content of iron concentrate ...
The results indicate that the sulfur in bauxite was successfully decreased through the reverse flotation. With an optimal condition of 10% solid density, particle size of −74 µm of 75%, pulp pH 9, temperature 30 °C, collector dosage of 120 g/t, copper sulfate dosage of 20 g/t, and terpenic oil dosage of 120 g/t, the recovery of Al 2 O 3 ...
The desulfurization performances of medium–high sulfur coking coal via combined methods of flotation and oxidation were compared creatively.. The desulfurization mechanism of medium–high sulfur coking coal was analyzed by XPS, SEM, MD simulation, etc in detail.. After combined treatment of flotation and H 2 O 2 …
In this flotation stage, galena and pyrite were effectively separated with 2000 g/t lime . 94.5% of lead was obtained in lead bulk concentrate, and most importantly, bulk pyrite concentrate with 85% recovery was gathered by reverse flotation without the addition of sulfuric acid . Zinc Rejection from Sulfur Concentrate
Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation @article{Cheng2022SynthesisAC, title={Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation}, author={Gan Cheng and g Zhang and …
The use of column flotation was considered for the "reverse flotation" of iron ore, where the gangue (quartz) was recovered in the froth product. ... "Desulfurization of coal by column flotation," Chapter 7, Processing and Utilization of High Sulfur Coals II, Chugh and Caudle, eds., Elsevier, New York, pp. 61–70. Google Scholar
Amines are the major cationic reagent used for reverse flotation of silicate/sulphide impurities. Pure mineral studies have shown that amines adsorb on the sulphide minerals via electrostatic interactions. Below pH 8, sulphide/silicate-amine interaction is due to 1:1 coordination, whereas above pH 8, silicate/sulphide-amine …
