Titanomagnetite ore two-stage grinding circuit tests

Pelevin, A. E.; Sytykh, N. A.; Kgok, Evraz

doi:10.17580/or.2018.02.03

2018

DOI: 10.17580/or.2018.02.03

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Titanomagnetite ore two-stage grinding circuit tests

A. E. Pelevin¹,

N. A. Sytykh²,

Evraz Kgok³

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Cited by 5 publications

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“…A two-stage grinding circuit is possible when using two screens with one mill MShTs-36005000. The tests performed using one Derrick 2SG40-60W-5STK sizer screen with a large shale sneaker size (0.15 mm) showed the possibility to use a two-stage grinding circuit only if the productivity of the processing unit is 10-15 % lower than planned, which is unacceptable for an industrial enterprise [20]. The disadvantages of using screens in a closed grinding cycle include a decrease in the productivity of the beneficiation plant (with an insufficient number of screens) or an increase in investment (large number of screens) and operating costs (increased wear of screens) with a constant plant productivity.…”

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

Pelevin

2022

PMI

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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.

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

Pelevin

2022

PMI

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“…Within each series, the oversize product was ground to a size of 50-85 % of the -0.045 mm class at a grinding time of 20, 25, 35, and 45 min. The mineralogical analysis of the ore minerals release was not carried out due to the laboriousness of the research, the grinding efficiency was estimated by the yield and quality of the beneficiation tailings (drainage of the MG separator) [37].…”

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Methodological substantiation of the choice for optimal modes of equipment operation during the stage-wise concentrate removal in iron ores beneficiation

Opalev

Alekseeva

2022

PMI

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The urgent task of improving the quality of iron ore concentrates was studied. We propose to use the stage-wise removal of the concentrate by combining fine screening, regrinding, and magnetic-gravity separation. Exemplified by magnetite ore from the Stoilensky GOK, a scientific and methodological approach to the search for optimal separation parameters and modes was substantiated. It includes several stages: studying the particle size distribution and release of useful components in the feed product to select classification parameters; a series of experiments on grinding oversize products to diverse sizes; beneficiation of the obtained products by MG separation. To select the optimal parameters of ore preparation, an analysis of the beneficiation efficiency was used, which is calculated according to the Hancock – Luyken criterion. The results of the research are experimental dependences that connect the process parameters of beneficiation with those of fine vibratory screening. For the studied ferruginous quartzite ore processed at the Stoilensky GOK, the obtained dependences can be described by a second-order polynomial with a high accuracy of approximation. The best performance is achieved with a particle size of 0.1 mm: Fetot content in the concentrate is 69.7 %, recovery is 85 %, classification efficiency is 80.4 %. The top size of the product in this case is 0.076 mm, which corresponds to 70-73 % grinding size of –0.045 class.

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The probability of particles screening on the screen, taking into account the interaction of particles over the meshes of the sieve

Pelevin

2020

E3S Web Conf.

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The probability of a single particle screening through the mesh of a screen is usually estimated by the A.M. Goden formula. During screening along a screen sieve, a quantity of particles moves. Particles of different sizes interact with each other. Large particles block the meshes of the sieve and reduce the probability of small particles screening. A screening probability formula is proposed that takes into account the interaction of particles over the sieve meshes and the possibility of several particles passing simultaneously through the sieve mesh. The results of modeling the probability of sieving and screening process are presented. An increase in the fraction of “small” particles in the primary product leads to an increase in the probability of sieving. When the material moves along the screen sieve (from the first to the last row of meshes), the probability of particle sieving decreases.

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Titanomagnetite ore two-stage grinding circuit tests

Cited by 5 publications

References 0 publications

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

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

Methodological substantiation of the choice for optimal modes of equipment operation during the stage-wise concentrate removal in iron ores beneficiation

The probability of particles screening on the screen, taking into account the interaction of particles over the meshes of the sieve

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