China 
Africa 
Explore chapters and articles related to this topic
Magnetic Separation
Published in Ko Higashitani, Hisao Makino, Shuji Matsusaka, Powder Technology Handbook, 2019
When matrixes such as ferromagnetic wire or balls are set between magnetic poles, a high-gradient magnetic field can be produced. The Frantz Ferrofilter separator (Figure 5.16.5), Jones high-intensity wet magnetic separator (Figure 5.16.6), Carpco high-intensity wet magnetic separator (Figure 5.16.7), and New York (NY) drum magnetic separator (Figure 5.16.8) belong to the Wet High Intensity Magnetic Separator (WHIMS) type. The Frantz Ferrofilter separator, which is the oldest model, is equipped with metal screens or grids as the matrix. Magnetic particles are separated as they are captured by the matrix, and placed in the magnetic field during the processing of pulp through the matrix. This type of separator has been employed to remove iron particles from clay. The Jones-type separator, which has a matrix of corrugated iron sheets, has been used to dress hematite ore. Balls, cubes, and twisted rods are employed as the matrix in the Carpco-type separator, while expanded metal or steel wool is used in the Eriz-type separator. The NY drum separator is a Yashima (YS) magnetic separator with many steel balls on the drum surface. Magnetic particles are captured by the high-intensity magnetic field created around the contact points of the balls.
Field Applications
Published in Ahmad Shahid Khan, Saurabh Kumar Mukerji, Electromagnetic Fields, 2020
Ahmad Shahid Khan, Saurabh Kumar Mukerji
Magnetic separation is a process in which magnetically susceptible material is extracted from a mixture using a magnetic force. This technique is useful in mining iron as it is attracted to a magnet. It is also used in electromagnetic cranes that separate magnetic material from scraps. Magnetic separators that used permanent magnets generate fields of low intensity only. High-intensity magnetic separators which employ electromagnets are found more effective in the collection of very fine paramagnetic particles
Magnetic Separation
Published in S. Komar Kawatra, Advanced Coal Preparation and Beyond, 2020
High-intensity magnetic separators, particularly those using powerful superconducting magnets, have tremendous potential for use directly following coal pulverizers at electrical utility companies. These separators can remove pyrite from the coal while it is entrained in the air stream, allowing the coal sulfur content to be reduced without introducing additional complexities such as dewatering.
Beneficiation Strategies for Removal of Silica and Alumina from Low-Grade Hematite-Goethite Iron Ores
Published in Mineral Processing and Extractive Metallurgy Review, 2022
V. Nunna, S. P. Suthers, M. I. Pownceby, G. J. Sparrow
To beneficiate ores that contain minerals with strong magnetic properties (e.g. magnetite and maghemite), wet low-intensity magnetic drum separators (drum LIMS) are usually used. This may be achieved with several stages of separation, or the drum may be used in combination with flotation as shown in flowsheets given by Xiong, Lu and Holmes (2015). The development of wet high-intensity magnetic separators (WHIMS) and wet high-gradient magnetic separators (HGMS), with a matrix in a ring of magnets (Jones 1960; Yang et al. 2018), have enabled iron minerals and admixtures that were considered too fine and too weakly magnetic (e.g. hematite, goethite, siderite, and limonite) to be separated from gangue minerals such as aluminum silicates, quartz, ferruginous clay, and shale that are predominantly non-magnetic in nature. Jena et al. (2015) used hydrocyclones and WHIMS to beneficiate hematite-goethite iron ore slimes containing quartz, kaolinite and gibbsite as gangue minerals. From slimes assaying 57.1 wt% Fe, 5.2 wt% SiO2, 6.3 wt% Al2O3, and 6.3 wt% LOI, a concentrate of 62.5 wt% Fe, 2.3 wt% SiO2, 3.4 wt% Al2O3, and 4.4 wt% LOI was obtained with an iron recovery of 79% and rejection of 68% of the silica and 65% of the alumina.
Beneficiation of Low-grade Iron Ore Fines by Using a Circulating-type Air Classifier
Published in Mineral Processing and Extractive Metallurgy Review, 2019
Venkata Nunna, Sarath Hapugoda, Sreedhar Gaekwad Eswarappa, Shiva Kumar Raparla, Rajan Kumar, Narendra Kumar Nanda
To assess the effective method of dry separation using circulating-type air classifier, present study of low-grade iron ore fines helped and the test work showed that there was a marginal improvement in the iron grade at the feed size tested (Table 9). Further, mineralogy study indicated that there is a possibility of separation of difficult to beneficiate weathered ochreous goethite iron minerals and liberated clayey minerals into fines product. With the removal of ultrafine size, the coarse size product will enhance the downstream dry magnetic separation efficiency (Jang et al. 2014; Tripathy et al. 2016). Application of dry magnetic separation such as induced roll high-intensity magnetic separator (IRMS) requires coarse (>45 µm) size product. So further study using combination downstream beneficiation options using circulating-type air classifier with reduction roasting followed by dry magnetic separation/electrostatic separation/finer grind sizes to liberate iron minerals and recover on the coarse product is recommended for future work.
Formation of pyrite in the process of fine coal desulfurization by microwave enhanced magnetic separation
Published in International Journal of Coal Preparation and Utilization, 2023
Zhenxing Zhang, Xinyu Wei, Guanghui Yan, Junwei Guo, Pengfei Zhao, Fan Yang, Hongyu Zhao, Bo Zhang
A DVMF 50–4 dry-type high gradient high-intensity magnetic separator (ERIZE company, USA) was selected for this test. The equipment of dry-type high-gradient magnetic separator includes a control cabinet, an electromagnetic coil, a blanking pipe, a magnetic medium, a material distribution device, an air supply device, a vibration system, and a cooling system. The equipment controls the operation of the instrument through the control cabinet, displaying the magnetic field strength, vibration intensity, output current, and output voltage.