Unit with a device for directional feeding of rocks with a shale structure

Романович, Марина; Romanovich, А. A.; Chekhovskoy, E. I.; Amini, Ebrahim

doi:10.1088/1742-6596/1926/1/012027

Cited by 2 publications

(5 citation statements)

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“…As a result, high-quality crushed stone with a maximum content (90-95%) of cubiform fractions has been obtained using the specified rational crushing modes. For comparison, when using cone, jaw and roller crusher machines, the yield of cubiform crushed stone is usually 15-20%, but not more than 50% [12], [13].…”

Section: Figure 9 Dependence Of the Yield Of -200 + 100 MM Grain-size...mentioning

confidence: 99%

“…In practice, cone, jaw and roller crusher machines are used for crushing stone [12], [13]. The authors in [14] use a press-roller machine to obtain cubiform crushed stone.…”

Section: Introductionmentioning

confidence: 99%

“…The authors in [14] use a press-roller machine to obtain cubiform crushed stone. However, when using these crusher machines, the yield of cubiform crushed stone is, as a rule, 15-20%, not more than 50% [12], [13]. Moreover, cone crushers are productive, but very heavy and difficult to operate.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, jaw crushers produce a crushed product of uneven size [12]. And roller crusher and a press-roller machines are mainly used for relatively soft shale rocks [13], [14].…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to significantly increase the yield of cubiform crushed stone from the original shale stone by using rotary crushers, the drum of which is equipped with teeth of a special configuration proposed by the authors in [13].…”

Section: Introductionmentioning

confidence: 99%

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Determining the rational operating parameters for granite crushing to obtain cubiform crushed stone

Bozhyk¹,

Sokur²,

Biletsky³

2022

Min. miner. depos.

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Purpose. Determining the rational operating parameters for granite crushing under impact in the field of centrifugal forces to obtain cubiform crushed stone. In order to achieve the purpose set, the task is to determine the operating parameters for obtaining the main grain-size classes: -50.0 + 20.0; -40.0 + 20.0; -20.0 + 10.0; -10.0 + 5.0 and 5.0 mm. Methods. The crushing process of granite crushed stone is studied in the conditions of the Kolomoievskyi Granite Quarry, Dnipropetrovsk region. Granite crushed stone with an initial grain-size of 100.0-0.0 mm and strength grade of M1400 is subjected to crushing. The accelerating rotor rotation frequency is the design value n = 200-1200 min-1. Fine crushing of granite is performed in a centrifugal-impact crusher by a free impact in the field of centrifugal forces. Findings. The optimal speed modes of centrifugal crusher operation, which provide the production of high-quality crushed stone with a maximum content of 90-95% cubiform fractions, have been substantiated. Originality. The yield dependences have been obtained of the grain-size classes: -50.0 + 20.0; -40.0 + 20.0; -20.0 + 10.0; -10.0 + 5.0 and 5.0 mm depending on the speed mode of the centrifugal crusher operation. Practical implications. The operating parameters for obtaining the main grain-size classes of cubiform crushed stone from granite have been determined: -50.0 + 20.0; -40.0 + 20.0; -20.0 + 10.0; -10.0 + 5.0 and 5.0 mm. In particular, it has been determined that for the production of cubiform crushed stone with -50.0 + 20.0 mm grain-size, the rotor rotation reasonable speed is 400-500 min-1 (the speed of material departure from the accelerating rotor is 45-50 m/sec); for cubiform crushed stone of -40.0 + 20.0 mm grain-size, the speed mode is 200 min-1 (25 m/sec); for cubiform crushed stone of -20.0 + 10.0 mm grain-size – 600-650 min-1 (70-80 m/sec), respectively. The maximum content of cubiform fractions in the -20.0 + 10.0 mm grain-size class is 95%, which is achieved at a rotor speed of 650-700 min-1 (departure speed is 75-80 m/sec). The maximum content of cubiform fractions in the -10.0 mm grain-size class is 94-95%, which is achieved at the accelerating rotor speed within 700-800 min-1 (departure speed is 70-80 m/sec). The obtained data make it possible to practically choose a rational speed mode of the centri-fugal-impact crusher operation to obtain the maximum yield of cubiform crushed stone.

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Section: Figure 9 Dependence Of the Yield Of -200 + 100 MM Grain-size...mentioning

confidence: 99%

“…In practice, cone, jaw and roller crusher machines are used for crushing stone [12], [13]. The authors in [14] use a press-roller machine to obtain cubiform crushed stone.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…At the same time, jaw crushers produce a crushed product of uneven size [12]. And roller crusher and a press-roller machines are mainly used for relatively soft shale rocks [13], [14].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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