The objective of this research was to improve the magnetic separation of coal and pyrite by enhancing the magnetic susceptibility of pyrite in run-of-mine coal through the use of selective ...

Magnetic separations have for decades been essential processes in diverse industries ranging from steel production to coal desulfurization. In such settings magnetic fields are used in continuous flow processes as filters to remove magnetic impurities. High gradient magnetic separation (HGMS) has found even broader use in …

Eriez is world authority in magnetic separation technologies. Since 1942, Eriez provides a range of permanent and electromagnetic separators for many industries.

Even though physical coal cleaning is easy and low cost, it does have the problem that only impurities in the larger sized particles can be cleaned (e.g., gravity separation requires particle size >0.5 mm). Physical cleaning cannot remove finely distributed minerals and chemically bounded species within a coal matrix.

The demand for novel, cost-effective, and environmentally friendly rare earth element and yttrium (REY) sources is essential. The recovery of REY and other valuable components from coal fly ash (CFA) may result in securing alternative resources, decreased disposal costs, and environmental protection, all of which may have positive …

Within the last several years there has been a renewed interest in wet drum magnetic separators used for heavy media applications. Accordingly, the wet drum magnetic separator has been re-engineered for heavy media applications. This is due largely to the increasing costs of magnetite.

The magnetic flotation hybrid separation process, which combines column flotation and magnetic separation, was anticipated to beneficiate a representative coal sample acquired from the El-Maghara coal mine with a …

A process involving coal-based direct reduction followed by wet low-intensity magnetic separation is presented in this paper with the objective of promoting the Fe content and reducing the P assay of…

Magnetic separation is a clean, pollution-free, low-cost, and high-efficiency method for separating minerals with different magnetic properties in a nonuniform magnetic field.

Semantic Scholar extracted view of "Application of Coal-based Direct Reduction-Magnetic Separation Process for Recycling of High-Iron-Content Non-Ferrous Metallurgical Wastes: Challenges and Opportunities" by Xianqing Xu et al.

Research objectives were to determine the degree of coal desulfurization that can be achieved with wet high-gradient magnetic separation, to study the effects of operating conditions on coal cleaning, to establish correlations between performance of a small cyclic separator and a large continuous unit, and to estimate the capital costs which might be …

Coal-based reduction followed by magnetic separation is proposed, which adopts coal as the reductant to reduce iron oxides to metallic iron below the melting temperature. The metallic iron particles aggregate and grow, and the particle size continuously increases to be suitable for magnetic separation.

The results showed that part of the sulfur content in raw coal is transferred into recovered iron by the "reduced iron powder + heat treatment + magnetic separation". Optimized desulfurization ...

In this paper, low rank coal co-pyrolysis with reduced iron powder (Fe powder) and then followed by dry magnetic separation was used to reduce the sulfur content of low rank coal.

The complex processing of it includes several stages, such as carbon flotation and magnetic separation of iron. This study focuses on carbon extraction by flotation method and iron by magnetic separation method from Kashirskaya GRES coal fly ash with subsequent reduction smelting of it.

ABSTRACT To address the challenging issue of achieving high-precision carbon-ash separation in coal gasification fine slag, magnetic separation and flotation techniques were employed to study their respective separation effect. Optimization tests were conducted to determine the optimal magnetic field gradient and magnetic field …

Ferrohydrostatic separation of particles in magnetic fluids is a sink-float technique based on generalized Archimedes law whereby, in addition to the conventional force of gravity, a magnetically induced force also acts on the fluid. This additional magnetic pull creates a magnetically induced buoyancy force on a particle immersed in the fluid. This buoyancy …

Coal-based reduction followed by magnetic separation is a promising technology for processing refractory iron ores. Analysis of the size distribution of metallic iron particles is an effective approach for exploring the mechanisms of coal-based reduction. As metallic iron particles exhibit very complex shapes compared with nature …

Hence, the treatment of coal gasification slag is extremely important. In this paper, the production, composition, morphology, particle size structure and water holding characteristics of coal gasification slag are introduced, and the methods of carbon ash separation of gasification slag, both domestically and abroad, are summarised.

Coal desulfurization is imperative to creating clean coal and reducing harmful emissions during the burning process. Due to the lack of effective technology in the field of fine coal dry separation, a novel microwave-enhanced magnetic property processing method was demonstrated in this manuscript.

From traditional and trusted magnetic separation equipment, right through to innovative sensor sorting technologies, we help our customers achieve their goals with sustainable solutions. Whether that is to improve profitability by raising yield, to reduce operating costs, or to improve product purity and even limit environmental impact from their operations, …

One-step preparation of coal-based magnetic activated carbon with hierarchically porous structure and easy magnetic separation capability for adsorption applications ... low cost, and wide applicability. Moreover, previous studies suggested that the transition metals in coals had a catalysis effect on the reaction between the …

Within the last several years there has been a renewed interest in wet drum magnetic separators used for heavy media applications.

This paper briefly introduces various methods of coal desulfurization (physical desulphurization, chemical desulfurization, biological desulfurization, etc.) and analyzes some problems existing in each method. The principle and research process of friction electrostatic separation technology and high gradient magnetic separation …

In this research, a selected kaolinitic coal gangue was calcined at lower temperatures in a mild oxidizing atmosphere and then magnetically separated. The dependence of the magnetic susceptibility on the temperature and holding time was studied, and the efficiency of magnetic separation after calcination was evaluated. The …

According to the different desulfurization stages, the coal-fired desulfurization method can be divided into pre-combustion desulfurization, in-combustion desulfurization and post-combustion desulfurization.

A technique with coal-based direct reduction followed by magnetic separation is presented in this study for recovering and reusing iron otherwise wasted in vanadium tailings. Process parameters such as usage of additives, tailings/reductant/additives ratio, reduction temperature and time, as well as particle size …

The first rotary kiln reduction-magnetic separation process, the Krupp-Renn process, was used to produce luppen (iron particle) in the 1930s. This process used coal as reductant instead of coke or electric energy, significantly saving production cost.

Semantic Scholar extracted view of "One-step preparation of coal-based magnetic activated carbon with hierarchically porous structure and easy magnetic separation capability for adsorption applications" by Yuwen Zhu et al.

Fine coal separation is one of the research focuses in the field of clean coal technology. A new type of fine coal dry separation technology was studied. Microwave energy was used to strengthen the magnetic properties of coal pyrite, leading to high- gradient magnetic separation.