Optimization of angular velocity of drum mixers

Golub, Gennadii; Myhailovych, Yaroslav; Achkevych, Oksana; Chuba, Viacheslav

doi:10.15587/1729-4061.2019.166944

Cited by 7 publications

(10 citation statements)

References 16 publications

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“…In [2] it is indicated that the use of drum mixers allows to obtain feed mixtures of high uniformity, eliminating the phenomenon of segregation and the formation of «dead» zones. The presence of radial vanes inside the chamber distributes the mixing body and increases surface flows, which improves the redistribution of material along the mixing axis.…”

Section: Introductionmentioning

confidence: 99%

Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades

et al. 2021

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The object of research is hypoeutectic cast iron intended for cast parts operating under abrasive friction conditions. Such parts are mixer blades, the operational properties of which include durability, assessed by abrasion resistance and strength. To give the blades such properties, cast irons, which are materials of the blades, are alloyed with elements that contribute to the formation of carbides of various compositions. The main problem that impedes the targeted selection of materials for mixer blades or finished blades from different materials or different chemical composition is the lack of substantiated selection criteria. If the shipment is carried out only with the provision of data on the chemical composition of the alloy, it is necessary to be able to evaluate the expected mechanical properties, in particular abrasion resistance and strength. Using the methods of regression analysis, a mathematical model has been obtained that includes two regression equations, which allows for a targeted selection of the chemical composition that provides the maximum possible value of mechanical properties – ultimate strength and coefficient of wear resistance. Optimization of the chemical composition, carried out according to this model, made it possible to determine the following chemical composition: C=2.94 %, Ceq=3.3 %, Ti=1.56 %, providing the maximum ultimate strength σb=391 MPa; C=2.78 %, Ceq=3.14 %, Ti=1.61 %, providing a maximum wear resistance coefficient Kwr=12 %. In the case of priority of the strength criterion, the calculated optimal chemical composition makes it possible to reduce the mass-dimensional characteristics of the mixing units of the mixers. A procedure is proposed for using this model to select a batch of blades with the expected best performance properties

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Section: Introductionmentioning

confidence: 99%

Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades

et al. 2021

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“…Drum-type reactors are widely used not only to produce compost but also in the chemical, food, pharmaceutical, mining, and other industries [12]. The main function of these reactors is the mixing of substances with different specific weight, granulometric composition, and physical-chemical properties [13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Compared to other types of machines to produce compost, drum-type reactors are widely used due to the capability to ensure the specified uniformity of mixing the substrate components. Their advantages include high performance, the preservation of properties of substrate components, minimal energy consumption, a low noise level during operation, the ease of operation and installation [10][11][12][13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining of the influence of reactor parameters on the uniformity of mixing substrate components

Golub¹,

Trehub²,

Holubenko³

et al. 2020

EEJET

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“…Among batch mixers, mixers with an inclined rotating tank with and without blades [13][14][15], including concrete mixers, are energy efficient. They are made both on the basis of a car [16], and mobile electrified structures [17] with manual movement to the place of use from vehicles.…”

Section: Introductionmentioning

confidence: 99%

Regression model of the influence of the height of drum mixer blades on the quality of mixture

et al. 2020

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The aim of the research was to establish the influence of the number and height of blades of a drum mixer on the quality of the prepared mixture of concentrated feed. The research method of the drum mixer provided for the experimental determination of the coefficient of variation (unevenness) of the mixture with a three-level combination of the blades height and their number. The absence of an extremum according to the obtained data required the use of a fourth level of the number of blades. Computer processing of the results made it possible to establish a functional dependence of the influence of design factors on the quality of the mixture. The implementation of the used research methodology for the operation of the drum mixer made it possible to establish an adequate functional dependence of the influence of the number of blades and their height on the quality of the mixture. The number of blades used practically does not affect the coefficient of variation of the content of the control component. The values change less than experimental error. However, existing trends indicate a slight (about 1%) decrease in the coefficient of variation of the mixture with an increase in the number of blades from 2 to 8 pcs. For 50 kg of feed in a drum capacity of 0.26 m3, the height of the blades is about 0.15 m. The increase or decrease in the height to 0.125 m or 0.175 m affects the quality of the mixture, increasing the coefficient of variation from 20.6% to 34-50% at the proportion of the control component of 1% and the mixing time of 200 seconds.

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Optimization of angular velocity of drum mixers

Cited by 7 publications

References 16 publications

Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades

Mathematical model of the mechanical properties of Ti-alloyed hypoeutectic cast iron for mixer blades

Determining of the influence of reactor parameters on the uniformity of mixing substrate components

Regression model of the influence of the height of drum mixer blades on the quality of mixture

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