Assessment of classification with variable air flow for inertial classifier in dry grinding circuit with electromagnetic mill using partition curves

Wołosiewicz-Głąb, Marta; Ogonowski, Szymon; Foszcz, D.; Gawenda, T.

doi:10.5277/ppmp1867

Cited by 12 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the coarse material particles in the recycle stream need proper air flow to be moved along the pipeline and then raised towards the mill chamber. Additionally, the precise classifier (of inertial-impingement type in this installation 25 ) requires higher air flow rates than the working chamber of the mill. Thus, extra air needs to be supplied just below the classifier (see Fig.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Model and simulator of inlet air flow in grinding installation with electromagnetic mill

Krauze

2023

Sci Rep

View full text Add to dashboard Cite

Comminution of raw materials consumes great shares of energy and operating costs of production and processing plants. Savings may be achieved, e.g., by developing new grinding equipment, such as the electromagnetic mill with its dedicated grinding installation; and by applying efficient control algorithms to these elements. Good quality control relies on mathematical models, and testing of versatile control algorithms is much simplified if a plant simulation environment is available. Thus, in this research, measurements were collected at the grinding installation with electromagnetic mill. Then, a model was developed that characterised the flow of transport air in the inlet part of the installation. The model was also implemented in software to provide the pneumatic system simulator. Verification and validation tests were conducted. They confirmed the correct behaviour of the simulator and good compliance with the experimental data, for both steady-states and transients. The model is then suitable for design and parametrization of air flow control algorithms and for their testing in simulation.

show abstract

Section: Methodsmentioning

confidence: 99%

“…1 a), and the air damper associated with it is never fully closed. Also, effectiveness of the separation process depends on the exact value of air flow rate through the classifier 25 .…”

Section: Methodsmentioning

confidence: 99%

Model and simulator of inlet air flow in grinding installation with electromagnetic mill

Krauze

2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…establishing interrelationships between the structural parameters of the mill and the course of the characteristic physical processes in its WC [2][3][4][7][8][9][10][11][12][13][14][15][16]]; • the creation and improvement of management systems [3,6,[17][18][19][20][21][22]; • experimental studies of grinding and/or mixing processes [1,2,5,14,19,[23][24][25]; • the improvement of existing and development of new technological processes that involve mills [5,11,20,22,[26][27][28][29].…”

Section: Analysis Of the Latest Studiesmentioning

confidence: 99%

“…In [3,8,18,25] the authors take into account effects of the electromagnetic mill control system together with its cooling system, WS flow regulator, filters and separators, various purification systems, heat exchanger and WS flow recirculation system for supplementary grinding. Based on the results of the mathematical modeling of processes in such a technological complex, conclusions about efficiency of the mill are presented.…”

Section: Analysis Of the Latest Studiesmentioning

confidence: 99%

“…As a rule, all components of the raw materials to be ground are fed to the WC with the help of a stream of compressed air or liquid. Such a flow is also called a transport flow [3,8,18]. Consequently, another factor definitely affecting the course of the process of millstones interacting with WS particles is hydrodynamic resistance forces.…”

Section: Indicators Of Force Interaction Of Millstones In a Rotating ...mentioning

confidence: 99%

See 1 more Smart Citation

A Study of Magnetic Mill Productivity

et al. 2023

View full text Add to dashboard Cite

The paper explores the characteristic indicators of the operation of a magnetic mill. A magnetic mill is a device designed for grinding or mixing substances by interaction with ferromagnetic working elements moving in a rotating magnetic field. The study established the main factors influencing force interaction between the components of such a system. An analysis of the magnetic field inside the working zone of the mill was conducted and the method of calculating the quantitative indicators of this interaction was found. The method responds to changes in the size of these elements, their position in the mill working area and changes in the intensity of the magnetic field. A mathematical model was developed. The model is used for calculating the trajectories of movement of the ferromagnetic elements that are placed in a rotating magnetic field and are confined by space of the working zone of the mill. Indicators directly related to the productivity of the grinding/mixing process were determined following an analysis of the simulation results. Based on comparison of the results obtained by calculation and experimental methods, it was proven that the proposed method is suitable for evaluating the productivity of the grinding/mixing process in a real technological system containing a magnetic mill.

show abstract

A method to perform float-and-sink test for separation of coal samples of various densities and determination of ‘Probable Error’ and ‘Imperfection’

Pradhan

Mohanta

2020

IOPSciNotes

View full text Add to dashboard Cite

This article presents a detail experimental procedure to perform float-and-sink tests for classifying coal samples according to their densities. Moreover, this article emphasizes obtaining ‘partition curves’ for three different coal samples (heavy media bath, big barrel and small barrel), which helps in evaluating and demonstrating classifier performance. Calculations of independent variables such as ‘Probable Error’ and ‘Imperfection’ are also discussed for partition curve that helps in evaluating the effectiveness of various beneficiation equipment used for the upgradation of quality of coal received from different coal mines. It was observed that there is a tendency for the partition curves to steepen as the density of separation decreases. In other words, separations at lower density is sharper than separations at higher density.

show abstract

Assessment of classification with variable air flow for inertial classifier in dry grinding circuit with electromagnetic mill using partition curves

Cited by 12 publications

References 0 publications

Model and simulator of inlet air flow in grinding installation with electromagnetic mill

Model and simulator of inlet air flow in grinding installation with electromagnetic mill

A Study of Magnetic Mill Productivity

A method to perform float-and-sink test for separation of coal samples of various densities and determination of ‘Probable Error’ and ‘Imperfection’

Contact Info

Product

Resources

About