Innovative crushing technique and vertical roll crusher design

2020 ◽  
Vol 2 ◽  
pp. 121-129 ◽  
Author(s):  
I.I. Basyrov ◽  
◽  
A.D. Bardovsky ◽  
Keyword(s):  
Vertical Roll ◽  
Roll Crusher

scholarly journals Antihysteresis of perceived longitudinal body axis during continuous quasi-static whole-body rotation in the earth-vertical roll plane

2011 ◽  
Vol 209 (3) ◽  
pp. 443-454
Author(s):  
M. Tatalias ◽  
C. J. Bockisch ◽  
G. Bertolini ◽  
D. Straumann ◽  
A. Palla
Keyword(s):  
Body Axis ◽  
Whole Body ◽  
Body Rotation ◽  
Longitudinal Body Axis ◽  
Vertical Roll ◽  
The Earth

FUNDAMENTALS OF THE LUMP CRUSHING THEORY. WORKING PROCESSES OF CRUSHING AND SCREENING EQUIPMENT. LECTURE 8

2021 ◽  
pp. 25-32
Author(s):  
A. I. Nizhegorodov
Keyword(s):  
Technological Process ◽  
Rock Properties ◽  
Road Vehicles ◽  
Roll Crusher ◽  
Screening Equipment ◽  
Hydraulic Classification ◽  
Working Processes

The article presents materials of Lecture 8 in Theory of carrying and lifting, construction and road vehicles and equipment, which describes the following issues: the rock properties, the rock crushing degree, the basics of the lump crushing theory and types of crushing machines. The technological process of crushing with a roll crusher is described; the values of forces acting in roll crushers are calculated.Along with the process of crushing, the article deals with the processes of segregation and concentration, the basic of the screening (fractionation) theory and features of the hydraulic classification of nonmetallic materials.

Modeling of coal breakage in a double-roll crusher considering the reagglomeration phenomena

2012 ◽  
Vol 232 ◽  
pp. 113-123 ◽  
Author(s):  
Jihoe Kwon ◽  
Heechan Cho ◽  
Myoungwook Mun ◽  
Kihong Kim
Keyword(s):  
Roll Crusher

Modeling of particle breakage in a smooth double roll crusher

2009 ◽  
Vol 90 (1-4) ◽  
pp. 97-100 ◽  
Author(s):  
Sajjan Kumar Soni ◽  
Satish Chandra Shukla ◽  
Gautam Kundu
Keyword(s):  
Particle Breakage ◽  
Roll Crusher

scholarly journals Design of a roll crusher for sunflower stems and substantiation of the rational modes of its operation

2021 ◽  
Vol 6 (1 (114)) ◽  
pp. 28-37
Author(s):  
Viktor Sheichenko ◽  
Volodymyr Volskyi ◽  
Rostyslav Kotsiubanskyi ◽  
Viktor Dnes ◽  
Misha Shevchuk ◽  
...  
Keyword(s):  
Quality Indicators ◽  
Technological Process ◽  
Cutting Edge ◽  
Plant Residues ◽  
Causal Relationships ◽  
Additional Load ◽  
Total Level ◽  
Total Percentage ◽  
The Right ◽  
Roll Crusher

This paper reports a study of the technological process of grinding plant residues of sunflower and the causal relationships of factors that form the system of quality indicators. The necessary prerequisites for determining rational modes and parameters of the roll crusher have been devised. A prototype of the roll crusher was designed and fabricated, in which the cutting knives are arranged along the entire width of the grip in a staggered manner, with the possibility to change the angle of inclination to the axis of drum rotation in the range of 5...20°. It was established that in the case of the right-side arrangement of the cutting edge of knives, the highest total level of the percentage of crushed stems in the range of 101‒150 mm with an additional load weighing 800 kg exceeded by 1.58 times the corresponding indicators of the roll with an additional load of 600 kg. The largest overall value of the percentage of crushed stems in the range of 0‒200 mm when additionally loading the roll with 800 kg was 1.13 times higher than the corresponding indicators of the roll with an additional load of 600 kg. In the range of 0‒200 mm, with an additional load on the roll of 600 kg, at the left-side arrangement of the cutting edge of the knives of the roll, higher total percentage of crushed stems was observed compared to the right-side arrangement. At a speed of 7.45 km/h, 13.6 km/h, the cumulative value of the percentage of crushed stems exceeded the corresponding indicators at the right-side arrangement of knives by 1.09 times, at the speed of 18.6 km/h – by 1.04 times, at the speed of 22 km/h – by 1.04 times, respectively. It has been noted that at the left-side arrangement of the cutting edge of the knives of the roll, the percentage of crushed stems in the range of 51‒100 mm, with an additional load of 600 kg, exceeded the corresponding indicators with an additional load of 800 kg. At the speed of 10.08 km/h, it was exceeded by 1.9 times; at the speed of 13.6 km/h – by 1.44 times; at the speed of 18.6 km/h – by 1.96 times; at the speed of 22 km/h – by 1.99 times, respectively

scholarly journals Determination of the contents of A- and B-starches in barley using Low Angle Laser Light Scattering

2011 ◽  
Vol 24 (No. 1) ◽  
pp. 11-18 ◽  
Author(s):  
I. Bohačenko ◽  
J. Chmelík ◽  
V. Psota
Keyword(s):  
Light Scattering ◽  
Laser Light ◽  
Laser Light Scattering ◽  
Starch Granules ◽  
Low Loss ◽  
Beta Glucanase ◽  
Know How ◽  
Cumulative Curves ◽  
Roll Crusher

A method was proposed for the determination of the contents of A- and B-starches in barley and for the use in plant breeding stations and brewing/malting laboratories. A combination was used of classical methods (incl. crushing of barley kernels by a roll crusher, steeping in 0.02M HCl, repeated rubbing and filtering through the sieve of 0.08 mm), and novel pieces of know-how (treatment with &beta;-glucanase and cellulase, alkalisation at pH = 10.0 and centrifugation of crude starch suspension through the layer of CsCl). In this way, barley starch of high purity was obtained at a very low loss, using Low Angle Laser Light Scattering for the determination of the size distribution of starch granules. The boundary of the particle size between the peaks of A-starch and B-starch (7 &micro;m) was evaluated from the distribution curves, while the contents of A- and B-starches were calculated from the cumulative curves. As a whole, the method was internally validated and for its repeatability and uncertainty of measurement the stimates of standard deviation s = 1.56 and confidence interval L<sub>1,2</sub> = x&plusmn; 1.9% were established, respectively. Taking into account the generally well known difficulties associated with the extraction of substances from biological materials, in this case the separation of starch from barley kernels, we believe that the proposed method will bring satisfactory results in practice. &nbsp; &nbsp;

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