ABSTRACT. Effective desulfurization of high-sulfur bauxite is one of the major problems in the alumina production industry. To overcome this, a novel nanoparticle collector (NC) to improve the desulfurization performance during flotation process was synthesized via emulsion polymerization method, whereby lignin (natural polymer) was …

[Show full abstract] size, froth velocity, froth colour and froth stability) in the column flotation was discussed during desulfurization of an iron ore using response …

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 ...

Flotation column experiments were conducted on a pilot scale by changing operating conditions for desulfurisation of iron ore concentrate, and the froth features along with the metallurgical ...

The flotation tailing (froth product) was collected for 3 min. In the study, the effect of different collectors, flotation pH values, and mixed collector rates were investigated. Figure 1. Flow sheet of flotation tests. The concentrates and tailings from flotation after the filtering and drying were weighed and assayed, respectively.

The latest innovations in iron ore flotation at major iron ore operations around the world are introduced. The development of flotation routes fro m direct an ionic flotation to reverse cationic ...

1 Desulfurization of hematitic concentrate of iron ore of the Gol-E-Gohar mine using reverse flotation method E. Panahi1, A. Abdollahzadeh2, A. Sam3, M. Jahani4, M. Yaghobi Moghaddam4, A. Mehrani5 ...

High-sulfur bauxite resources exceed 800 million tonnes in China [].Sulfur contained in this kind of bauxite severely disrupts alumina production [], the high-sulfur bauxite has not yet been exploited and utilized on a large scale.The research on processing high-sulfur bauxites to date has mainly focused on the roasting method …

Both pyrite types showed high recoveries at pH 4.75 to 8, but in the flotation of iron oxides-pyrite, partial depression was found in the pH range of 6–7. The presence of iron ions in solution considerably depressed iron oxide-pyrite flotation in the pH range of 2.5–3. Recovery of both pyrites decreased dramatically when going from pH 10 ...

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.

Flotation is the most commonly used process for desulfurization of iron concentrates in iron beneficiation plants. The current study deals with improving the metallurgical performance of the flotation circuit at Sangan iron beneficiation plant. A plant survey indicated that sulfur content of iron concentrate is sometimes higher than that of the …

Flotation Column Iron Ore Desulphurization Optimization Experimental Design Operational Variables Process Performance . iron ore were analysed by means of an ANOVA model. 3. Results and Conclusions

To explore the occurrence and distribution characteristics of fine-grained pyrites in coal and the effect of pyrite particle size on flotation efficiency, coal samples from Guizhou province and Shanxi province, …

Flotation Tests Bench-scale flotation tests in a 1.5 L RK/FD III type flota-tion machine were conducted under the conditions previ-ously documented [8]. The bauxite sample (150 g) was wet ground to below 74 µm 75% particle size in a RK/ZQM ball mill. The typical flowchart is shown in Fig. 1. Unless

Desulfurization of high sulfur bauxite is an important issue in Bayer alumina production. In this study, by using two anionic sulphydryl collectors (HX, HD) as mixed collectors (PYDH), the selectivity of flotation separation between pyrite and diaspore was improved, thereby reducing the sulfur content of high sulfur bauxite and ultimately …

The strategy uses a flotation stage superstructure that represents alternative flotation circuit configurations. This representation is similar to that used by Cisternas et al. (2014), but several products are allowed in the circuit.In addition, as is discussed later, each flotation stage can operate with different objectives, e.g., to concentrate one mineral or …

At present, high sulfur bauxite is gradually being used in the production of alumina industry to address the shortage of bauxite resources in China. However, sulfur-containing minerals in bauxite can cause iron pollution in the digestion system, corrode steel facilities, increase caustic consumption, and affect the quality of alumina products. …

The iron powder to coal powder ratio was 1:1 when the iron powder was used in the reaction experiment. The result is shown in Fig. 3. When the reduced iron powder was involved in the reaction, the desulfurization rate was higher than that without crystallized iron powder. The highest magnetic separation desulfurization effect of 1 h at …

Coal desulfurization by flotation method. S R Nurhawaisyah 1, N Jafar 1, S Bakri 1 and S Widodo 2. Published under licence by IOP Publishing Ltd IOP Conference Series: Earth and Environmental Science, Volume 1134, The 4th International Conference on Global Issues for Infrastructure, Environment and Socio-Economic Development …

To overcome this, a novel nanoparticle collector (NC) to improve the desulfurization performance during flotation process was synthesized via emulsion polymerization method, whereby lignin ...

The anionic reverse flotation of iron oxide is usually carried out with automatic slurry temperature control at 35 °C 12,14 or 30 °C 1. In this paper, the flotation experiments of the iron oxide ...

A tremendous amount of research has been done on refining the flotation process for iron ore and designing the reagents which go into it. This paper reviews the industrial practices and fundamental research surrounding iron ore flotation. The advantages and disadvantages of direct flotation, cationic reverse flotation, and …

Desulfurisation and ash reduction of pyrolysis carbon black from waste tires by combined ... concentration of 99 kg/t. Then, flotation results show that 79.96% yield of clean carbon black and 9.14% ash content for flotation concentrate under ... Then, iron scraps were removed by magnetic separation. Thirdly, CBp was separated and purified …

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 pH were considered on the flotation column performance in desulfurization process from iron concentrate. Sulfur, total Fe contents, and d80 of the sample were found to be 0.48%, …

The impact of the zeta potential and surface chemistry on flotation and deslime is also discussed. The aim of this paper is to provide a well-detailed, well …

Pyrite flotation was observed to be effective with a statistical monolayer of xanthate that could be adsorbed as mixture of dixanthogen and metal-xanthate complex. Non-floated fractions showed high amounts of carbonate, and presence of hydroxyl iron sulfate (Fen(OH)m(SO4)p, xH2O) which have inhibited the hydrophobicity effect of adsorbed …

The desulfurization of iron ore concentrate by the column flotation process is highly nonlinear and complicated . The main objective of the current study was to …

Thirty-seven years of mining and processing of Cu-porphyry ore has been resulting in the production more than 540 million tons of waste tailings in Sarcheshmeh industrial complex, Iran's largest Cu producer. The main objective of this study is to evaluate the changes that occurred in the trace elements content of Sarcheshmeh mine tailings …

1. Introduction. Bauxite is the main industrial raw material for alumina production. With the increasing scarcity of high-quality bauxite resources, high-sulfur bauxite has gradually become the main raw material for alumina production by the Bayer process in China, and the economic utilization of abundant high-sulfur bauxite resources …