This inspired us to purify pyrolysis slag by magnetic separation and flotation method. The results show that when the grinding particle size of -0.040mm accounts for 80.1%, the content of Pb and ...

Preparation of magnetic biochar by impregnation-pyrolysis is conducted by impregnating biomass with a solution containing transition metal salts, removing the solvent, and then pyrolysing the dried residue in a muffle furnace under an oxygen-limited or inert atmosphere to afford the magnetic biochar product. ... and the separation and recovery ...

Scientific Reports - Magnetic field coupling with lunar soil simulants. ... For each test, separation between transmit coil and receive coil is approximately 40 mm, which is the distance for ...

The results show that when the grinding particle size of −0.040 mm accounts for 80.1 %, the content of Pb and Zn in pyrolysis slag decreased to 0.32 % and 0.17 %, respectively, by only using the magnetic separation method. Then the …

In this study, lowering of pyritic sulfur took place after thermal treatment at 500–700°C (pyrolysis) using a wet high-intensity magnetic separation process. The samples were subjected to size reduction to −25 µm and characterized with X-ray diffraction (XRD), proximate and ultimate analysis, and differential thermal analysis (DTA).

The magnetic separation experiment in this study adopts a small, homemade small magnetic separation device consisting of a shell cover, funnel, recycling tank, and Ndfeb magnetic bar made of transparent acrylic material. The external size was 180 * 11 * 360 mm, and the maximum processing capacity was 200 g. ... Pyrolysis with …

The pyrolysis residues were then removed from the well-type furnace, weighed and stored for analysis and subsequent magnetic separation experiment. During magnetic separation process, the pyrolysis residues obtained under the optimum pyrolysis conditions were ground to—0.5 mm. For each test, 20 g of pyrolysis residues …

To investigate the effcet of co-pyrolysis on iron recovery and iron grade, magnetic separation experiments were conducted for the various solid residues samples. Fig. 7 a shows the iron recovery and iron grade as functions of the mass fraction of RM. The co-pyrolysis was conducted at 550 °C and the used magnetic separation flux density …

After dry magnetic separation, the organic sulfur content can be reduced from 2.00% for low rank coal before the pyrolysis to 0.33% for the coal after 700 °C co-pyrolysis with Fe powder at the coal/Fe-powder mass ratio of 4:1. ... The sulfur content of coal after the pyrolysis and dry magnetic separation is significantly reduced. However, …

In this study, fast pyrolysis followed by high intensity dry magnetic (HIDM) separation e xperiments. were conducted to obtain liquid and solid fuels from Çayırhan region lignites. First ...

1. Introduction. Excellent adsorption capacities and rapid magnetic separation makes magnetic biochar very attractive in removal of heavy metals and organic pollutants from aqueous solution (Gurav et al., 2020, Ifthikar et al., 2017, Yi et al., 2020a).It is noted that the combination of magnetic species with biochar inevitably affects the …

In this study, lowering of pyritic sulfur took place after thermal treatment at 500–700°C (pyrolysis) using a wet high-intensity magnetic separation process. The …

Further, the magnetic properties of pyrite in coal are enhanced after heat treatment, which is conducive to the development of magnetic separation technology [24]. Hence, microwave pretreatment of pulverized coal can stimulate the rapid pyrolysis of the pyrite in the coal and transform it into pyrrhotite and troilite to enhance the magnetic ...

The novel process involved pyrolysis of high sulfur coal at low temperature and then a dry magnetic separation. For testing the cleaning coal process, a Chinese high sulfur coal, Baisu coal was pyrolyzed in a fixed bed reactor from 400 to 700°C for 30min, and then separated by a dry magnetic separator.

Recovery of valuable elements from pyrite pyrolysis slag using magnetic separation-flotation technique | Semantic Scholar. DOI: 10.1016/j.seppur.2022.121772. …

The development of low-cost adsorbent is an urgent need in the field of wastewater treatment. In this study, sludge-based magnetic biochar (SMB) was prepared by pyrolysis of sewage sludge and …

In the present study, a magnetically separable adsorbent, manganese ferrite (MnFe 2 O 4)/sugarcane bagasse biochar magnetic composites (MFSCBB-MCs), was fabricated through a one-step pyrolysis method.The characterization of the prepared adsorbents indicated that MnFe 2 O 4 nanoparticles were successfully embedded into …

Moreover, Xu et al. used the magnetic separation method to separate the metallic Co from Li 2 CO 3 and graphite (Li et al., 2016). The pyrolysis product contained Li 2 CO 3, Co and C, and the Li recovery rate was lower than 82.7% when the pyrolysis temperature was higher than 1123 K.

Magnetic Separation Effect of Magnetic Field Intensity. The magnetic separation was performed on the pyrolysis residues to investigate the possibility of …

This work introduces a novel methodology for synthesis of magnetic biochar from cellulose using an electromagnetic induction technology. More rough surfaces, sharp corners and edges, and compact regular pore structure with Fe 3 O 4 and Fe 2 O 3 of magnetic biochar was obtained. Such magnetic biochar possessed higher specific …

A magnetic solid base catalyst (potassium phosphate/ferroferric oxide) was prepared and used for catalytic fast pyrolysis of poplar wood to selectively produce phenolic-rich bio-oil. Pyrolysis–gas chromatography/mass spectrometry experiments were conducted to investigate the effects of pyrolysis temperature and catalyst-to-biomass …

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The results show that the MCS had excellent magnetic separation properties. When the pH value was higher than 5, the pH of the aniline solution had little effect on the adsorption capacity of MCS and CS. ... Xu J, Wu M, et al. Effects of biomass pre-pyrolysis and pyrolysis temperature on magnetic biochar properties. J Anal Appl …

Oil sludge pyrolysis with the addition of different amounts of steel slag at different temperatures was conducted by employing a continuous pyrolysis-magnetic separation (CPM) process.

Preparing of nanoporous carbon-magnetic nanoparticle composite (NPC-Fe 3 O 4). Size of Fe 3 O 4 in the composite adjusted by controlling the pyrolysis temperature.. T 2 relaxivity of NPC-Fe 3 O 4 optimized for construction of magnetic resonance sensor.. Ultrasensitive detection of AFB 1 in various food samples with complicated matrix.. …

The iron was recovered by magnetic separation with magnetic intensity at 1160 G for 20 min. Under the optimum operation, 61.38% of zinc was recovered and 80.9% of iron recovery was achieved.

1. Introduction. Magnetic biochar (MBC) is a kind of biochar composite material loaded with magnetic materials, which not only retains the excellent properties of biochar (BC) but also has magnetic separation characteristics (Yi et al., 2020a).BC has achieved good results in environmental remediation, but it can only be separated from …

Based on this result, a process involving SHPS reduction roasting with corncob pyrolysis reducing gas-magnetic separation was established to recover iron from SHPS. This process not only effectively utilizes the iron oxide in SHPS by converting it into iron concentrate powder for the ironmaking industry but also proves that the pyrolysis …

In these cases, impurities may cause carbon fouling and require frequent separation/regeneration treatments. Magnetic separation allows easy isolation and washing, followed by redispersion [35]. Herein, we report the successful magnetization of oak wood and bark fast pyrolysis biochars to overcome the clogging during adsorbent …

Therefore, we propose a continuous pyrolysis-magnetic separation (CPM) process to dispose of oil sludge while recovering pyrolysis oil and steel slag. In the CPM process, the waste steel slag functions as catalyst because of its mineral composition but can also be recovered by magnetic separation after being reduced by the pyrolysis …

The optimal magnetic separation indexes of roasted products are obtained in the applications of waste coconut shells (CS), pine sawdust or other plant residues [23], [24], [25]. Subsequently, Rath et al. studied the reduction roasting process of iron ore mines using cow dung as the reductant, in this study, the grade and recovery were 64% and ...

Metals like copper, tin, and iron in the pyrolysis residues were separated by selective crushing, sieving, gravity separation, and magnetic separation.

The WPCBs were pyrolyzed at 700°C under a nitrogen atmosphere. Pyrolysis oil and gas can be reused as fuel for the pyrolysis of WPCBs. Metals like copper, tin, and iron in the pyrolysis residues were separated by selective crushing, sieving, gravity separation, and magnetic separation.

roasting with corncob pyrolysis reducing gas−magnetic separation was established to recover iron from SHPS. This process not only effectively utilizes the iron oxide in …