scholarly journals ANALYTICAL DESCRIPTION OF THE MIXER PERFORMANCE FOR BULK MATERIALS WITH SCREW BLADES

2019 ◽  
pp. 69-78 ◽  
Author(s):  
Марина Борисова ◽  
Marina Borisova ◽  
Владимир Новиков ◽  
Vladimir Novikov ◽  
Владимир Коновалов ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Animal Feed ◽  
Bulk Material ◽  
Specific Energy Consumption ◽  
Analytical Description ◽  
Bulk Materials ◽  
Rotating Shaft ◽  
Discharge Opening ◽  
Horizontal Shaft ◽  
Blade Mixer

The aim of the study is to reduce the energy consumption of the blade mixer for bulk materials in regard to its de-sign parameters. Preparation of feed mixtures is carried out mainly by mixers of various designs, as well as extrud-ers and other auger equipment. Widespread horizontal mixers with blades mounted on a rotating shaft are wide-spread and used. They are distinguished by the ability to achieve the necessary smooth mixture within short oper-ating time. The main purpose of the proposed mixer is the preparation of dry mixtures of bulk feed components. The intended use of the mixer is the preparation of concentrated animal feed n agricultural production. In Samara SAA, the design of the blade mixer with screw blades was developed based on the literature review and analysis of the technological process of mixers. The mixer consists of a body with a horizontal shaft with radial trapezoidal screw blades. The proposed blades allow to direct forces in such a way that the total (resulting) projection of the resistant force of the material along the shaft will tend to zero due to the changing angle of the profile and width of the blades. At the same time, an axial force will be created at the edge of the blade at a certain radius, which facili-tates to unload mixer through the discharge opening. The expressions of specific energy consumption for mixing, as well as the work duration of the mixer cycle are given. An expression allowing estimation of an average flow rate of bulk material from the discharge opening of the mixer is obtained. It is established that the position of the gate regulating the area of the discharge opening can affect the volume of the portion simultaneously processed by the mixer, filling volume of mixer and the quality of the mixture.

scholarly journals Study of energy consumption when mixing bulk materials in a centrifugal-blade mixer

2021 ◽  
Vol 640 (7) ◽  
pp. 072040
Author(s):  
S A Ratnikov ◽  
D M Borodulin ◽  
D V Sukhorukov ◽  
D K Cherkashina
Keyword(s):  
Energy Consumption ◽  
Bulk Materials ◽  
Blade Mixer

Energy-Efficient Technology Supply Bulk Materials

2015 ◽  
Vol 741 ◽  
pp. 500-503 ◽  
Author(s):  
Alexander D. Ishkov ◽  
Dmitri A. Semernin ◽  
Svjatoslav V. Miloradov ◽  
Irina V. Voronina
Keyword(s):  
Energy Efficient ◽  
Human Error ◽  
Bulk Material ◽  
Specific Energy Consumption ◽  
Quality Parameters ◽  
Efficient Technology ◽  
Bulk Materials ◽  
Material Supply ◽  
Energy Efficient Technology ◽  
Technical Solutions

Submission materials are the main manufacturing operation in the industry. It largely determines the quality parameters of products. Mechanization and automation of bulk material supply operation in the process eliminates human error and improves the product quality. This work was aimed at finding technical solutions that the reduction of specific energy consumption and enhance the reliability of the vibrating and pneumatic feeders. The article describes the developed the authors vibratory and pneumatic feeders.

scholarly journals Factors to improve the efficiency of a vertical screw mixer of bulk materials

2019 ◽  
Vol 110 ◽  
pp. 01041 ◽  
Author(s):  
Roman Cherkasov ◽  
Kasyan Adigamov ◽  
Victor Pershin ◽  
Arkady Cherepenko
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Driving Force ◽  
Specific Energy Consumption ◽  
Maximum Effect ◽  
Technical Solution ◽  
Bulk Materials ◽  
Lead Angle ◽  
Screw Mixer ◽  
Inner Surface

The paper shows that it is possible to increase the efficiency of a vertical screw mixer of bulk materials and reduce costs by determining the required size of the feeding hole in the lower part of the casing, as well as by installing a screw flange with a reverse winding in relation to the screw spiral inside the screw casing and by installing a replaceable tip with a variable lead angle at the lower end of the screw. The analysis of the process of screw loading in the hopper allowed us to obtain an analytical dependence to determine the required size of the feeding hole, in which mixed materials freely enter the screw spiral. It is proved that the placement of the screw flange on the inner surface of the casing increases the driving force of material by 1.05 – 1.80 times depending on the screw speed, which significantly reduces specific energy consumption for preparation of mixture of the desired quality. The paper provides the formula for calculating the angle of installation of the flange with respect to the screw spiral, in which the maximum effect of the flange on the mixed materials is obtained. In order to ensure the effective capture of mixed materials in the loading zone of the screw, it is proposed to perform the first spiral turn from the lower end of the screw with a variable lead angle and place it on a replaceable tip. A technical solution to the placement of spirals on the double-threaded screw is also proposed.

scholarly journals SPECIFIC ENERGY CONSUMPTION – THE COMPARISON OF BELT CONVEYORS

Mining Scince ◽  
2019 ◽  
Vol 26 ◽  
Author(s):  
Natalia Suchorab
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Inclination Angle ◽  
Specific Energy ◽  
High Efficiency ◽  
Bulk Material ◽  
Specific Energy Consumption ◽  
Mining Industry ◽  
Belt Conveyor ◽  
Belt Conveyors

Belt conveyors (BCs), because of their high efficiency, are widely used for bulk material handling in the mining industry. However, due to the high level of conveyors’ energy consumption, the belt conveyor systems generate a large part of mining costs. Therefore, the current solutions mostly focus on implementing new management strategies, which find energy consumption as a key indicator in designing belt conveyor systems. Belt conveyor equipment selection, conveying systems, operation, applied mining technology are considered to be areas where improvement of belt conveyors’ energy efficiency may be achieved. Moreover, they can be used to implement novel standards for BC equipment and the proposal of defining new quality standards and creating BCs’ classification has been already outlined. The main idea of the paper is to compare the values of specific energy consumption (SEC) of BCs with regard to the inclination angle of a conveyor route which results from technological needs. The multiple regression is used to find a relationship between two basic independent variables – the volume of transported material and conveyor’s inclination angle – and a dependent variable (SEC). The procedure enables to determine the value of SEC which is required for lifting the material. Presented results prove that the value of SEC required for lifting the material is crucial for the interpretation of the SEC value when it comes to energy efficiency comparison.

Energy-Efficient Vibratory Feeder of Bulk Construction Materials

2014 ◽  
Vol 670-671 ◽  
pp. 458-461 ◽  
Author(s):  
Alexander D. Ishkov ◽  
Alexander V. Stepanov ◽  
Svjatoslav V. Miloradov ◽  
Irina V. Voronina
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Energy Efficient ◽  
Specific Energy Consumption ◽  
Construction Materials ◽  
Elastic Membrane ◽  
Bulk Materials ◽  
Technical Solutions ◽  
Vibrating Feeders ◽  
Vibrating Feeder

Any processing of bulk materials requires their moving and uniform feed (dosage). On this depends the quality and efficiency of many technological processes. For uniform and controlled supply of bulk, materials for transporting or processing machines use feeders. Among feeders in recent years, an increasing distribution received disk vibrating feeders, which are characterized by small size, without moving parts, prostate, reliability, accuracy and smooth control supply. Disk vibrating feeder has a horizontal spreading disk, which is located coaxially and with a gap below the outlet of the hopper. Spreading disk is connected with vibratory drive. This research was aimed at finding technical solutions ensuring the reduction of specific energy consumption of disk vibrating feeder. The study showed, that if the spreading disc perform with a central hole, which is closed by an elastic membrane, then this can significantly reduce the specific energy consumption per unit of production.

Determination of grinding parameters of fenugreek seed

1970 ◽  
Vol 26 (1) ◽  
pp. 16 ◽  
Author(s):  
S Balasubramanian ◽  
Rajkumar Rajkumar ◽  
K K Singh
Keyword(s):  
Particle Size ◽  
Energy Consumption ◽  
Moisture Content ◽  
Specific Energy ◽  
Feed Rate ◽  
Average Particle Size ◽  
Specific Energy Consumption ◽  
Average Particle ◽  
Fenugreek Seeds ◽  
Fenugreek Seed

Experiment to identify ambient grinding conditions and energy consumed was conducted for fenugreek. Fenugreek seeds at three moisture content (5.1%, 11.5% and 17.3%, d.b.) were ground using a micro pulverizer hammer mill with different grinding screen openings (0.5, 1.0 and 1.5 mm) and feed rate (8, 16 and 24 kg h-1) at 3000 rpm. Physical properties of fenugreek seeds were also determined. Specific energy consumptions were found to decrease from 204.67 to 23.09 kJ kg-1 for increasing levels of feed rate and grinder screen openings. On the other hand specific energy consumption increased with increasing moisture content. The highest specific energy consumption was recorded for 17.3% moisture content and 8 kg h-1 feed rate with 0.5 mm screen opening. Average particle size decreased from 1.06 to 0.39 mm with increase of moisture content and grinder screen opening. It has been observed that the average particle size was minimum at 0.5 mm screen opening and 8 kg h-1 feed rate at lower moisture content. Bond’s work index and Kick’s constant were found to increase from 8.97 to 950.92 kWh kg-1 and 0.932 to 78.851 kWh kg-1 with the increase of moisture content, feed rate and grinder screen opening, respectively. Size reduction ratio and grinding effectiveness of fenugreek seed were found to decrease from 4.11 to 1.61 and 0.0118 to 0.0018 with the increase of moisture content, feed rate and grinder screen opening, respectively. The loose and compact bulk densities varied from 219.2 to 719.4 kg m-3 and 137.3 to 736.2 kg m-3, respectively.  

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