High Gradient Magnetic Separation Research Articles

Combinatorial optimization of rotating matrix in centrifugal high gradient magnetic separation

Centrifugal high gradient magnetic separation (CHGMS) produces higher selectivity than conventional HGMS in concentrating weakly magnetic minerals owing to the use of rotating matrix, so its separation performance is closely related to the configuration of the matrix. In this work, the magnetic capture characteristics of the rotating matrices with different configurations to magnetic particles were described using a simulation model, and a combinative rotating matrix was proposed on the basis of the simulation results. The CHGMS performances of the combinative and conventional rotating matrices were then comparatively investigated for the separation of a fine ilmenite ore. From the simulation results, the increase in the spacing between magnetic wires and wire diameter decreases the mass weight of magnetic particles captured onto the internal wires of rotating matrix, improving its capture selectivity; whereas, the increase in the layer spacing of magnetic wires increases their capture mass weight, enhancing the capture capability of the matrix. For comparison, the combinative matrix achieves significantly superior performance to that of the conventional one for separating fine ilmenite, which is consistent with the simulation results. This investigation provides an important reference for the optimization and development of rotating matrix in CHGMS technology.

Removal of Cationic and Anionic Heavy Metal Ions From Aqueous Phase by a HGMS and Magnetized Zeolite

A magnetic separation study was conducted employing magnetized zeolite and a high gradient magnetic separation system (HGMS) for removal of both cationic and anionic heavy metals. Magnetized zeolite Y was prepared with variable iron contents ranged from 1.2-22.8% based on surface concentration. The magnetized zeolite showed decreased adsorption capacity for cations while the adsorption capacity of the adsorbent for anion increased and the adsorption capacity was proportional to the iron contents. The captured rate of dispersed adsorbents after use for removal of contaminants is a very important factor in water treatment processes. The magnetic separation system recovered more than 98% of magnetized zeolite at 3 T of magnetic field. Current result indicates the combination of magnetized zeolite and HGMS separation could be an efficient alternative for simultaneous removal of cationic and anionic heavy metal from water phase.

A novel method for efficient recovery of ilmenite by high gradient magnetic separation coupling with magnetic fluid

Ilmenite is the main raw material for titanium extraction. The vanadium titanium magnetite deposit in Panzhihua has abundant ilmenite resources. A flowsheet combining high gradient magnetic separation (HGMS) and flotation was applied to recover the ilmenite, which had defects of high production cost due to high flotation regent consumption, low ilmenite utilization rate of 20% as ultrafine minerals were directly discharged into tailings, as well as bring a series of environmental problems. In this study, a novel method termed high gradient magnetic separation coupling with magnetic fluid (HGMSCMF) was developed to recovery ilmenite in Panzhihua. Paramagnetic MnCl2 solutions were introduced to eliminate competing capture between ilmenite and titanaugite particles and improve selectivity. Under equivalent TiO2 recovery, TiO2 grade of magnetic products increased significantly with MnCl2 concentration. Pulsating flow could further strengthen the improvement effect of selectivity by magnetic fluids. For the first time, qualified ilmenite concentrate (TiO2 grade > 46%) with TiO2 recovery equal to that in industrial production was obtained only through HGMSCMF (without using flotation) with one roughing and three cleaning processes under the optimal conditions of MnCl2 concentration 40%, applied induction 0.6 T and pulsating frequency 400 r/min. HGMSCMF presents great potential in solving tough problems being faced in processing weakly magnetic minerals. Follow-up studies will focus on recycling and reuse of magnetic fluids for realizing industrial application of HGMSCMF in recovering ilmenite or other refractory weakly magnetic minerals.

Combined clarification and affinity capture using magnetic resin enables efficient separation of rAAV5 from cell lysate

Recombinant adeno-associated virus (rAAV) vectors have displayed enormous potential as a platform for delivery of gene therapies. Purification of rAAV at industrial scale involves a series of elaborate, material, and time-consuming midstream steps, such as clarification by depth filtration and concentration/buffer exchange by tangential flow filtration. In this study, we developed a filter-less flow capture method for purification of rAAV serotype 5, using a high-gradient magnetic separator and magnetic Mag Sepharose beads coupled to an AVB affinity ligand. In under 2 h, we captured and eluted rAAV5 directly from ∼5L of cell lysate with a recovery yield of 63% (±5%, n= 3). Compared to cell lysate, the eluate showed a 3-log reduction of host cell DNA and host cell proteins. The process developed eliminates the need for filtration and column chromatography in the early steps of industrial rAAV purification. This will be of high value for industrial-scale manufacturing of rAAVs by reducing time and material in the purification process, without compromising product recovery and purity.

Removal of SUS304 fine particles transformed into martensite by the high gradient magnetic separation under dry condition

The interfusion of impurities such as metallic wear debris has been a major issue in the manufacturing process of foods, medicines and industrial products. Such debris originates with wearing of stainless-steel pipe joints or mechanical moving parts. Since the debris shows ferromagnetic properties by undergoing the strain-induced martensitic transformation of non-magnetic SUS304 (X5CrNi18-10), the magnetic separation system is much efficient to remove such debris from raw materials. In order to study the magnetic separation properties for the martensitic transformation fine particles, the several kinds of magnetic powder with different magnetization were prepared by controlling the amount of martensitic transformation by heat-treating SUS304 powders. The magnetic separation performance was evaluated by the high gradient magnetic separation (HGMS) experiments using the multilayer unidirectional magnetic wire filter under dry condition. The experimental results and FEM particle trajectory simulations revealed that the SUS304 powders transformed into martensite were removed at high speed of 0.1 m/s by the superconducting HGMS in a relatively low magnetic field.

How to design a low-cost pilot scale magnetic bioseparation process for protein separation from complex mixtures using in-line process analytics

Magnetic separation is a powerful tool for the integrated capture and purification of biomolecules and cells directly from complex feed media without the need for prior clarification and without the risk of equipment blockage. In this study, we equipped a commercially available rotor–stator high-gradient magnetic separator (RS-HGMS) with in-line analytics of hygienic design (absorbance, conductivity, pH, and flow) and used it for a systematic characterization of the equipment. By combining particle agglomeration and separation studies with residence time analysis, magnetic filter capacity, and particle retention experiments for bare iron oxide nanoparticles (BIONs), we developed a generic RS-HGMS operation protocol optimized for minimal particle carry-over and efficient buffer exchange. To demonstrate the versatility of our approach, we customized this operation protocol for the challenging task of lactoferrin separation from crude acid whey, which serves as an illustrative example in this paper. The modifications involved simple adjustments of pump speed, step duration, and cycle repetition without altering the fundamental principles of our generic approach. In this proof-of-concept, a BIONs carry-over of less than 0.037 g L-1 was achieved in the elution fractions, and the in-line sensors enabled continuous monitoring and documentation of the process, providing valuable data for process optimization and validation. This paper demonstrates how a magnetic separation process can be effortlessly tailored for challenging bioseparation tasks, while emphasizing the importance of implementing continuous in-line process monitoring and data logging. We believe this is an essential step toward the wider adoption of this promising technique in the industry.

Study on condition prediction and influencing factors of manganese carbonate recovery by high gradient pulse magnetic separation

Manganese carbonate ore belongs to weakly magnetic minerals, and its co-associated minerals are mainly non-magnetic minerals, which can be separated from gangue minerals at high magnetic field intensity. However, manganese grade and recovery of magnetic separation concentrate of manganese carbonate ore are low in actual production. Therefore, the influences of manganese carbonate particle size, magnetic field intensity, volume susceptibility, pulse stroke, pH, and other factors were studied. The optimal test conditions for manganese carbonate ore recovery by high-gradient magnetic separation were predicted through the calculation results. The results show that the particle radius of manganese carbonate is 0.020 mm, the pulse impulse time is 200 r/min, and the magnetic field intensity is 0.9 T. The optimum condition test was carried out with Qianbei manganese carbonate ore as the material. The test results show that the optimum conditions are the particle radius of 0.074-0.019 mm, pulse impulse time of 200 r/min, and magnetic field intensity of 1.2 T. The reason for the deviation is that the actual ore has a fine distribution particle size, many associative bodies, complex composition, and serious agglomeration, resulting in variable particle volume susceptibility. The capture yield increases with the increase of magnetic field intensity and volume susceptibility but decreases with the increase of pulse. The lower the surface potential of manganese carbonate, the higher the recovery of manganese carbonate. The grade of manganese concentrate was 19.06% and the recovery was 76.85%. Mixed manganese concentrate with a grade of 18.04% and recovery of 87.14% was obtained by adding drugs and changing the grinding method.

Separation of iron from converter dust by superconducting HGMS: A simulation analysis and experimental study

Converter dust (LT dust) is an important solid waste from steelmaking, in which iron oxides are the preferred raw material for preparing high value-added α-Fe2O3. Since LT dust contains many impurities, the iron oxides in the LT dust must be enriched and purified before the preparation of α-Fe2O3. Particle trapping behaviors of the matrices as well as the magnetic flocculation of LT dust particles in superconducting high gradient magnetic separation (S-HGMS) were investigated with numerical simulations and experiments. The geometric shape, aspect ratio a:b, and angle α between the axis and the magnetic field direction of the matrices affected the maximum magnetic field intensity (Hmax) and effective capture area (Seca). Diamond matrices had better particle-capture capacity than elliptic and circular matrices because the diamond matrices produced a tip effect and increased the magnetic field force. When the cross section of the matrices was parallel to the direction of the particle velocity, magnetic/weakly magnetic particles were more easily captured by the upper and lower ends of the matrices compared with that of two sides because the particle velocity at the upper and lower ends of the matrices was smaller than that of two sides, making the magnetic force greater than the drag force. Fe2MgO4 and Fe2O3 particles were more prone to magnetic flocculation than other particles because of their higher magnetic susceptibility. The dispersant changed the pH of the solution and the charges on the surface of LT dust particles, and the particles were effectively dispersed because of the action of electrostatic forces. When the magnetic induction was 1.8 T, the dispersant dosage was 20 mg/L, the pulp concentration was 1.5%, and the total Fe content increased by 8.72%, corresponding to an Fe recovery of 91.65%. Finally, a method was developed for extracting iron oxides from LT dust using S-HGMS, to prepare high value-added α-Fe2O3.

Development of a high-gradient magnetic separator for enhancing selective separation: A review

Development of a high-gradient magnetic separator for enhancing selective separation: A review

Separation mechanism and experimental investigation of pulsating high gradient magnetic separation

Pulsating high gradient magnetic separation (PHGMS) has been widely used for separating magnetic minerals in the past decades. In practice, magnetic field and flow field are the main factors that affect the capture of magnetic particles by medium wires. Therefore, an insight into the magnetic field distribution and the flow field distribution around the matrix would provide a crucial foundation for understanding the separating mechanism. In this investigation, the magnetic field and the flow field in the PHGMS process are simulated. Furthermore, the capture of hematite on matrix and its dependence on the key parameters of the PHGMS separator, i.e., wire diameter of rod matrix, particle size, magnetic induction and flow velocity are analyzed. The results indicate that the slurry forms a roundabout flow around the wire and the fluid velocity around the magnetic wire’s left and right sides is far greater than that of the upper and lower sides; with the increase of distance from the magnetic wire surface, the magnetic induction intensity around the magnetic wire decreases gradually. It all proves that the magnetic particles are mostly captured on the upper and lower surface of the magnetic wires in the matrix. The optimized parameters obtained from pilot-scale, the rod diameter of 2 mm, particle size of 60%, magnetic field intensity of 0.9 T and re-cleaning magnetic field intensity of 1.1 T. When all the parameters are optimized, a full-scale PHGMS process produced a magnetic concentrate assaying 63.24% Fe with 93.67% recovery from the hematite feed assaying 49.22% Fe.

Eco-friendly strategy for preparation of high-purity silica from high-silica IOTs using S-HGMS coupling with ultrasound-assisted fluorine-free acid leaching technology

Iron ore tailings (IOTs), a typical hazardous solid waste, seriously threaten human health and the ecological environment. However, the abundance of quartz, particularly in high-silica IOTs, renders them useful. Yet, state-of-the-art technologies have rarely reported the preparation of high-purity silica from high-silicon IOTs. Thus, this study proposed an eco-friendly technology for producing high-purity silica from high-silica IOTs through the coupling of superconducting high gradient magnetic separation (S-HGMS) preconcentration with leaching followed by the use of ultrasound-assisted fluorine-free acid solution. Following an analysis of the separation index and chemical composition, the optimum conditions for the quartz preconcentration were determined as a magnetic flow ratio of 0.068 T s/m, a slurry flow velocity of 500 mL/min, and a pulp concentration of 40 g/L. Consequently, the SiO2 grade increased from 69.32% in the raw sample to 93.12% in quartz concentrate following the application of S-HGMS, with the recovery reaching 45.24%. X-ray diffraction, vibrating sample magnetometer, and scanning electron microscope analyses indicated that quartz was effectively preconcentrated from the tailings by S-HGMS. Subsequently, employing the “ultrasound-assisted fluorine-free acid leaching process,” impurity elements were removed and high-purity silica was produced. Under optimal leaching conditions, the SiO2 purity of silica sand increased to 97.42%. Following a three-stage acid leaching process with 4 mol/LHCl +2 mol/LH2C2O4, the removal efficiency of Al, Ca, Fe, and Mg exceeded 97% for all cases, and the SiO2 purity in high-purity silica reached 99.93%. Thus, this study proposes a new strategy for the preparation of high-purity quartz from IOTs, which facilitated the effective realization of the high-value utility of the tailings. Furthermore, it provides a theoretical basis for the industrial application of IOTs, which is of great scientific significance and practical application value.

Recovery and preparation of high-grade silica from iron ore tailings by S-HGMS coupling with acid leaching technology: Description of separation mechanism and leaching kinetics

High‑silicon iron ore tailings (IOTs) as mineral solid wastes derived from the processing and utilization of iron ore, which would threaten human health and the ecological environment if handled improperly. Coincidently, it consists of abundant quartz gangue. In this study, we proposed a superconducting high gradient magnetic separation (S-HGMS) coupling with acid leaching technology to prepare high-grade silica from high‑silicon IOTs. S-HGMS was applied to high‑silicon IOTs to pre-concentrate silica into quartz concentrate. Under the optimized conditions, the SiO2 grade in quartz concentrate reached 92.06% with a SiO2 recovery of 43.54%. The results indicate that the S-HGMS effectively achieved a selective separation of silica from high‑silicon IOTs, but entrainment occurred between silica and sub-micron impurities particles, reducing the SiO2 grade and recovery. Quartz concentrate was then subjected to a mixed acid leaching to remove metallic impurities. Under the conditions of the ratio of mixed acid of 5 mol/L HCl + 1 mol/L HF, leaching temperature of 353.15 K, and leaching time of 12 h, the SiO2 purity of high-grade silica reached 99.51%, and the removal efficiency of Fe, Al, Mg, and Ca from quartz concentrate was 95.20%, 85.60%, 97.99%, and 97.19%, respectively. During the leaching process, HF played a vital role and its' nucleophilic attack can provide the effective removal of metallic impurities. The dissolution behaviors of Fe, Al, Mg, and Ca were described as shrinking core models, but their controlled steps were significantly different. Thermodynamic results indicate that Fe, Al, Mg, and Ca leaching processes were dominated by ΔS0 rather than ΔH0, and their ΔG0 from lowest to highest were ΔG0Ca<ΔG0Mg<ΔG0Fe<ΔG0Al<0, indicating that Ca ion may be leached more easily. Ultimately, a prospect was proposed for the high-value application of high‑silicon IOTs resource. This study provides valuable insight to realize the recycling and utilization of tailings for its industrialization.

Application of High-Gradient Magnetic Separation for the Recovery of Super-Paramagnetic Polymer Adsorbent Used in Adsorption and Desorption Processes

This study examined the application of high-gradient magnetic separation (HGMS) for recycling of super-paramagnetic polymer adsorbent (MPA), namely, polyvinyl acetate-iminodiacetic acid. The HGMS can be incorporated with the adsorption and desorption processes (ADPs) with fresh or regenerated desorbed MPAs and exhausted adsorbed MPAs, respectively. This combines the permanent magnet’s advantage of low running costs with the easy operation using the solenoid to flush the filter in place. The effects of the inlet concentration of MPA in solution (CLF,i) and the fluid velocity (v0) or volumetric flow rate (QLF) on the performance of the recovery of MPA via HGMS were assessed. The results indicated that the separation efficiency (η or P0), breakthrough time (tB) and exhaustion time (tE) of HGMS reduce as CLF,i, as well as v0, increases. Further, the filter saturated capture capacity (σS) of HGMS also decreases with increasing v0. The effect of v0 on tB proportional to 1/v02 is more significant than that on σS proportional to 1/v0. A kinetic model of HGMS shows good agreements for the experimental and predicted breakthrough results, with determination coefficients of 0.985–0.995. The information obtained in this study is useful for the rational design and proper operation of a HGMS system for the recycling and reuse of MPA in ADPs.

High Gradient Magnetic Separation of Pure Gd2O3 Particles from Pure La2O3 Particles

Rare earth oxides such as La2O3 and Gd2O3 are abundant in waste optical glass. The separation of rare earth oxides is beneficial to the recycling of rare earth resources. In this study, the rare earth oxide Gd2O3 particles were separated from La2O3 particles using high gradient magnetic separation, and the influence of different fluid media (i.e., water, anhydrous ethanol, and their mixture) on the separation results was investigated. By using the measured zeta potential of oxide particles in water/ethanol of different pH and water with different dispersants (Na2SiO3 9H2O, citric acid, Na2CO3, and sodium hexametaphosphate), the DLVO (Derjaguin–Landau–Verwey–Overbeek) potential calculations and their analysis applied to high gradient magnetic separation results were also performed. The results showed that using anhydrous ethanol or adding a dispersant in water as a fluid medium can promote the separation of magnetic Gd2O3 particles under a high-gradient magnetic field. Among the different conditions, anhydrous ethanol can improve the grade of Gd2O3 to 95% from 70% with water. Furthermore, ethanol can be reused after filtration, making it an environmentally friendly fluid medium. Among the four dispersants, sodium hexametaphosphate, Na2SiO3, and Na2CO3 can also increase the separation rate of La2O3 and Gd2O3 to about 95%. The effect of citric acid on the separation performance is slightly worse, and the recovery rate of Gd2O3 is 80%. This study provides a new reference for selecting a fluid medium for magnetic separation.

Pre-concentration of quartz from sea sand through superconducting high gradient magnetic separation technology

ABSTRACT In this study, a superconducting high gradient magnetic separation (S-HGMS) technology was used to separate and extract quartz from sea sand. Under optimal conditions (i.e., a magnetic flow ratio of 0.085 T·s/m, slurry flow velocity of 400 ml/min, and pulp concentration of 40 g/L), the SiO2 grade increased from 79.45% of the raw material to 91.35% of quartz concentrate, and the removal rate of Al and Fe reached 91.97% and 82.10%, respectively. Weakly magnetic particles in sea sand were selectively transformed to tailings, and the pre-concentration of quartz was achieved under a high magnetic field intensity. The high magnetic field intensity and mineral magnetic differences were the critical factors influencing the magnetic separation of quartz from sea sand. The S-HGMS technology achieved effective pre-concentration of quartz from sea sand, reducing the handling capacity and providing a high-quality material for subsequent quartz refinement processes.

Iron ore beneficiation technologies in Russia and ways to improve their efficiency

Increasing the efficiency of crushing circuits is associated with a decrease in the particle size of finely crushed ore and the use of dry magnetic separation of crushed ore. Reducing grinding costs is achieved by using drum mills jointly with mills of other designs. The use of automation systems, slurry demagnetization, technologies with staged concentrate separation, and beneficiation and fine screening in a closed grinding cycle lead to a reduction in grinding costs. The main industrial technology for improving the quality of concentrate is its additional beneficiation using regrinding, fine screening, flotation, and magnetic-gravity separators. Increasing the integrated use of iron ore raw materials is associated with an increase in the yield of iron concentrate and the production of hematite concentrate during the beneficiation of hematite-magnetite ores and ilmenite concentrate during the beneficiation of titanomagnetite ores. Incremented concentrate yield is possible by using magnetic separators with an increased magnetic induction up to 0.25-0.5 T in the first stages of beneficiation. To obtain hematite and ilmenite concentrates, combined technologies can be used, including fine screening, high-gradient magnetic, gravity, flotation, and electrical separation.

Development of a Single‐Use Device and an Associated Optical Measurement Method for Automated Magnetic Bioseparation

AbstractIn bioseparation, magnetic particles can be used for the adsorption of biomolecules. They can be selectively separated from multi‐component suspensions with high‐gradient magnetic separation (HGMS). A single‐use HGMS separation chamber has been developed to avoid cross‐contamination. As with fixed‐bed adsorption, breakthrough occurs after a certain time. Subsequently, the magnetic particles that are then still further fed, are lost together with the biomolecules bound to them. In order to stop the HGMS process before breakthrough, an associated optical measurement method was developed.

Separation and purification of high-purity quartz from high-silicon iron ore tailing: An innovative strategy for comprehensive utilization of tailings resources

High-silicon iron ore tailing is typically regarded as abundant mining waste of little use; it occupies a vast area of land and is harmful to human health and the ecological environment. Nevertheless, high-silicon iron ore tailing contains abundant quartz resource. In this study, a superconducting high gradient magnetic separation (S-HGMS) coupling fluorine-free mixed acid leaching technology was used to prepare high-purity quartz from high-silicon iron ore tailing. The S-HGMS technology was applied to separate and extract quartz from high-silicon iron ore tailing. Subsequently, the obtained quartz concentrate was subjected to an acid mixture leaching procedure to extract its impurities and obtain high-purity quartz. The optimal conditions determined for the magnetic separation process were a solid concentration of 4% and slurry flow velocity of 0.12 m/s. Under these conditions, the SiO2 grade of the quartz concentrate reached 98.56 ± 0.13%, and the SiO2 recovery was 60.59 ± 0.13%. The optimal conditions of the leaching process were a solid–liquid ratio of 1:4, leaching temperature of 80 °C, reaction time of 10 h, and acid mixture of HNO3, HCl, and H2SO4 (molarity ratio of 1:4:1). Under these conditions, the SiO2 purity reached a maximum value of 99.92 ± 0.01% in the high-purity quartz. Furthermore, we proposed a process for evaluating the recovery potential of Fe from iron-rich substances and recycling the leaching solution. The applied technology achieved a comprehensive utilization of high-silicon iron ore tailing and no waste discharge, meanwhile provides a theoretical basis and data support for its industrialization.

Magnetic properties of chalcopyrite and arsenopyrite for high-gradient magnetic separation with Crystal-Field Theory

Separating chalcopyrite from arsenopyrite using flotation has been a big challenge due to their similar floatability. However, this challenging condition may be partially solved by employing their difference in magnetic susceptibility. As a matter of fact, pulsating high-gradient magnetic separation (PHGMS), as an environment-friendly and economic strategy, was recently attempted to remove arsenopyrite from chalcopyrite with considerable performance. In this study, the magnetic difference of chalcopyrite and arsenopyrite was confirmed using the Density Functional Theory (DFT) calculation and the Vibrating Sample Magnetometer (VSM) measurement. The results indicated that the two minerals possess significant magnetic property difference, and the chalcopyrite has a much larger magnetic susceptibility than that of arsenopyrite. The theoretical analysis based on the Crystal-Field Theory revealed that the difference was resulted from their spin state of d electrons in Fe ions. This has been further demonstrated by the separation performance of a cyclic PHGMS separator in separating a pure chlacopyrite-arsenopyrite mixture, which assays 15.69% Cu and 22.66% As. Under the optimized conditions, the separator produced a chalcopyrite concentrate assaying 20.25% Cu and 9.92% As, with 79.07% Cu and 26.82% As recovered respectively; in the non-magnetic product, the Cu grade was reduced to 8.48% and the As grade was improved to 42.83%. This investigation has demonstrated a potential perspective for the environmental-friendly and economic removal of arsenopyrite from chalcopyrite using PHGMS method.

Separation of Copper-Molybdenum Flotation Concentrate by Superconducting High-Gradient Magnetic Separation

Separation of chalcopyrite from molybdenite is currently mainly carried out by flotation, but this process is costly because of the extensive use of inhibitors. This study briefly describes a 7.0T/100CGC low-temperature superconducting magnetic separator and discusses its separation principle as well as the effect of magnetic induction on chalcopyrite separation from molybdenite. A molybdenum (Mo) concentrate assaying 6.00% copper (Cu) and 19.01% Mo was magnetically sorted using a diamond-shaped steel rod medium mesh at a feed concentration of 20% and a pulp flow rate of 5 L/min from a Cu-Mo flotation concentrate with 88% of particles smaller than 23 μm using the separator. A Mo concentrate assaying 0.46% Cu and 16.28% Mo was finally obtained with a roughing (1.3 T)-cleaning (5 T) superconducting magnetic separation process. Similarly, the superconducting magnetic separator was performed to separate a Cu-Mo bulk flotation concentrate, and produced Cu concentrate assaying 19.64% Cu and 0.03% Mo from the bulk concentrate assaying 18.52% Cu and 0.39% Mo with a particle size of less than 0.074 mm. At a magnetic induction of 7 T, a pulp concentration of 20% and a feed velocity of 5 L/min, the grade and recovery of Cu in the magnetic product were 19.64% and 81.59%, respectively, whereas the grade and recovery of Mo in the non-magnetic product were 1.52% and 90.07%, respectively. Superconducting magnetic separation has potential applications for removing Cu from Mo concentrates, and separating Cu and Mo from Cu-Mo bulk flotation concentrates.