scholarly journals Some Peculiarities of the Process of Preparing the Zeolites Containing Breeds in a Ball Mill

2019 ◽  
Vol 8 (4) ◽  
pp. 7695-7698
Keyword(s):  
Energy Consumption ◽  
Ball Mill ◽  
Point Of View ◽  
Specific Productivity ◽  
Grinding Process ◽  
Ball Mills ◽  
Practical Point ◽  
Grinding Conditions

The article presents the results of studies of grindability of zeolite-containing rocks in ball mills with different grinding conditions. The results of studies of grindability of zeolite-containing rocks, optimization of the grinding process and determination of the specific productivity of industrial mills are presented. From a practical point of view, the data obtained can reduce the energy consumption of the grinding process of zeolite-containing rocks and increase the values of equipment efficiency and improve the quality of the finished product.

scholarly journals Determination of granulometrical composition of the clinker by grinding in a ball mill to determine the specific consumption of additional energy

2020 ◽  
Vol 180 ◽  
pp. 04007
Author(s):  
Cristian Ciobanu ◽  
Paula Tudor ◽  
Gabriel-Alexandru Constantin ◽  
Gabriel Musuroi
Keyword(s):  
Energy Consumption ◽  
Specific Surface ◽  
Specific Energy ◽  
Ball Mill ◽  
Specific Energy Consumption ◽  
Grinding Process ◽  
Additional Energy ◽  
Second Stage ◽  
Cylindrical Metal

This paper presents results regarding the grinding behaviour of two batches of material (clinker) in a ball mill with its own two-step grinding process: the first one with a ball load, the second with a load of cylindrical metal bodies. The first step was performed until the residue R009 has reached aprox.35%, and the second stage until Blaine's specific surface was over 3800 cm2/g. Periodically, at 10-minute intervals, the fineness of the clinker and the specific energy consumption were determined. These consumptions are quantified from the first determination and relates to the weight of the material subjected to grinding (20 kg clinker / from a source), determining the grinding ability of the material.

Tertiary Nitrification Pilot Plants on Parisian Waste Water

1990 ◽  
Vol 22 (1-2) ◽  
pp. 347-352 ◽  
Author(s):  
C. Paffoni ◽  
B. Védry ◽  
M. Gousailles
Keyword(s):  
Waste Water ◽  
Metropolitan Area ◽  
Fixed Bed ◽  
Point Of View ◽  
Operating Conditions ◽  
Research Center ◽  
Daily Output ◽  
Practical Point ◽  
Fixed Bed Reactors

The Paris Metropolitan area, which contains over eight million inhabitants, has a daily output of about 3 M cu.meters of wastewater, the purification of which is achieved by SIAAP (Paris Metropolitan Area Sewage Service) in both Achères and Valenton plants. The carbon pollution is eliminated from over 2 M cu.m/day at Achères. In order to improve the quality of output water, its tertiary nitrification in fixed-bed reactors has been contemplated. The BIOFOR (Degremont) and BIOCARBONE (OTV) processes could be tested in semi-industrial pilot reactors at the CRITER research center of SIAAP. At a reference temperature of 13°C, the removed load is approximately 0.5 kg N NH4/m3.day. From a practical point of view, it may be asserted that in such operating conditions as should be at the Achères plant, one cubic meter of filter can handle the tertiary nitification of one cubic meter of purified water per hour at an effluent temperature of 13°C.

Modeling of spatial distribution of passenger traffi c on interurban bus routes

Innotrans ◽  
2020 ◽  
pp. 31-36
Author(s):  
Alexander V. Martynenko ◽  
◽  
Alexander A. Shevtsov ◽  
Keyword(s):  
Spatial Distribution ◽  
Quantitative Description ◽  
Point Of View ◽  
Practical Point ◽  
Ticket Price ◽  
Passenger Traffic ◽  
Correlation And Regression Analysis ◽  
Classical Gravity ◽  
Bus Service

This paper is devoted to the quantitative description of the spatial distribution of passenger traffic based on the classical gravity model on the example of interurban bus service between Yekaterinburg and other cities of the Sverdlovsk region. The influence of factors such as population, distance between localities, and ticket price on the volume of passenger traffic was studied. As a result of the correlation and regression analysis, it was found that both the distance between localities and the ticket price can be used as a measure of the remoteness of localities. However, the quality of the resulting regression model does not change. The spatial distribution of interurban bus passenger traffic depends on the measure of distance of localities from each other and the size of their population. Moreover, the size of the population is a much more significant factor than the measure of distance. From a practical point of view, this means that when predicting passenger traffic, demographic factors must first be taken into account.

Temperature during the vibration-assisted compression of alfalfa

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 141-150
Author(s):  
Xiaoyu Wu ◽  
Shuai Yang ◽  
Chundong Song ◽  
Kun Ding ◽  
Chuanzhong Xuan ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Vibration Frequency ◽  
Experimental Results ◽  
Maximum Temperature ◽  
Compression Time ◽  
Vibration Parameters ◽  
Reducing Energy ◽  
Compression Temperature

Compression of alfalfa into briquettes is an effective way to solve the problem of storage and transportation. In the process of compression, heat is generated and the temperature is raised in the material. In fact, the appropriate temperature can improve the quality of alfalfa briquettes and reduce the energy consumption of densification. In this study, the effect of assisted vibration on the compression temperature was tested. The results showed that when the vibration frequency was below 15 Hz, the temperature at the center and side in compressed alfalfa increased slowly with compression time. When the vibration frequency was above 20 Hz, it increased first and then decreased with the increase of time. Moreover, the maximum temperature value increased remarkably when the frequency was above 20 Hz. In the same vibration frequency and compression time, the center temperature in the compressed alfalfa was higher than the side temperature. The experimental results provide a reference for the determination of reasonable vibration parameters, and explanation of the effect of vibration on reducing energy consumption.

scholarly journals Determination of Odor Intensity of Binary Gas Mixtures Using Perceptual Models and an Electronic Nose Combined with Fuzzy Logic

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3473 ◽  
Author(s):  
Szulczyński ◽  
Gębicki
Keyword(s):  
Fuzzy Logic ◽  
Point Of View ◽  
Odor Intensity ◽  
Gas Mixture ◽  
Electronic Noses ◽  
Practical Point ◽  
Fuzzy Logic Algorithm ◽  
Holistic Analysis ◽  
Analyze Data

Measurement and monitoring of air quality in terms of odor nuisance is an important problem. From a practical point of view, it would be most valuable to directly link the odor intensity with the results of analytical air monitoring. Such a solution is offered by electronic noses, which thanks to the possibility of holistic analysis of the gas sample, allow estimation of the odor intensity of the gas mixture. The biggest problem is the occurrence of odor interactions between the mixture components. For this reason, methods that can take into account the interaction between components of the mixture are used to analyze data from the e-nose. In the presented study, the fuzzy logic algorithm was proposed for determination of odor intensity of binary mixtures of eight odorants: n-Hexane, cyclohexane, toluene, o-xylene, trimethylamine, triethylamine, α-pinene, and β-pinene. The proposed algorithm was compared with four theoretical perceptual models: Euclidean additivity, vectorial additivity, U model, and UPL model.

scholarly journals Research on the relative productivity of a drum mill type SAG 8.5×5.3

2020 ◽  
Vol 168 ◽  
pp. 00012
Author(s):  
Ivan Minin
Keyword(s):  
Energy Consumption ◽  
Control Parameters ◽  
Operational Mode ◽  
Operational Parameters ◽  
Technological Parameters ◽  
Expected Performance ◽  
Relative Productivity ◽  
Required Quality

The determination of the optimal operational mode of drum mills can be assessed by different criteria. The most important of them can be formulated as follows: “To be specified and established the values of the mill operational parameters regarding to which it is possible to be provided the user’s expected performance at the required quality of the final product and the same to be achieved at minimal energy consumption”. For the fulfillment of this condition, there has to be determined the laws of productivity variation, the final product quality and the energy consumption in function of the adequately chosen representative control parameters of the mill. There are obtained mathematical models, describing the most important technological parameters of the machine and are made conclusions about the factors influencing on them.

Sound Insulation Determination of Door

2014 ◽  
Vol 1057 ◽  
pp. 215-222 ◽  
Author(s):  
Dušan Dlhý ◽  
Peter Tomašovič
Keyword(s):  
Structural Complexity ◽  
Point Of View ◽  
Sound Insulation ◽  
Laboratory Measurements ◽  
Door Frame ◽  
Small Change ◽  
Sound Reduction ◽  
Reduction Index

The structural complexity of a door causes difficulties in the description of its behavior from an acoustical point of view. In many cases, even a small change can cause a big difference in its sound-isolating properties. To determine the acoustical quality of a door, it is important to perform laboratory measurements of the door structure and door frame, the gaps including. A mathematical analysis based on experimental measurements of the sound reduction index of several door constructions was used to determine the acoustical door categories. The equations for calculating the sound reduction index, which were introduced in this paper, should help in the design of a suitable door from an acoustical point of view.

scholarly journals Trace Elements Analysis in Drinking Water of Meghalaya by Using Graphite Furnace-Atomic Absorption Spectroscopy and in relation to Environmental and Health Issues

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Elarina N. Dkhar ◽  
Paul S. Dkhar ◽  
Jasha Momo H. Anal
Keyword(s):  
Water Quality ◽  
Trace Elements ◽  
Drinking Water ◽  
Graphite Furnace ◽  
Major And Trace Elements ◽  
Point Of View ◽  
Health Issues ◽  
Trace Elements Analysis

Determination of the certain major and trace elements was carried out in drinking water supply scheme in three districts of Meghalaya. This work aims to identify trends resulting in the deterioration of drinking water which is also a potential source of environmental contaminants. About 50 samples, each from one district, were collected both from the source and various tanks and tap. The elements determined are Li, Na, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Rb, Ag, Au, Pb, Cd, Se, Ca, K, and Mg. The pH is slightly lower than neutral pH of 7 while the turbidity is very high even after treatment. The concentrations of Ca and Mg are found to be deficient. The elements Cr, Fe, Co, Ni, Zn, Mo, and Pb decrease after treatment while Mn, Cu, and Cd increase slightly after treatment. Se concentration is found to be much higher than expected. The results were compared with the standard recommendation values for the quality of drinking water. This study provides a general indication of where water-quality constituent concentrations met or exceeded water-quality standards and the data presented in this report will be useful from public health point of view.

scholarly journals OPPORTUNITY COST ARE A KEY TO CASH PUZZLE OF THE COMPANY

2015 ◽  
pp. 98-105
Author(s):  
S. I. Lutsenko
Keyword(s):  
Capital Market ◽  
Opportunity Cost ◽  
Random Effect ◽  
Point Of View ◽  
Model Specification ◽  
Opportunity Costs ◽  
Internal Sources ◽  
Relationship Of

Features of influence of opportunity cost on the cash policy of the Russian companies are considered. The author analyzes relationship of cause and effect of escalating of cash. The author researched features of a choice the Russian companies of sources of financing. The author shows that availability of opportunity costs forces the companies to be reoriented on internal sources of financing. Opportunity costs are the indicator for a choice of optimum financing. The model (specification) presented in work is tested for determination of its adequacy, from the point of view of quality of forecasting. It is estimated three kinds of specifications: pooled regression, regression with a random effect and regression with the fixed effect. The purpose of work attempt to open cash puzzle of company disclosing of a puzzle. That is, to reduce opportunity costs for preserving of cash as the preventive motive, allowing to struggle with financial restrictions. Novelty of the presented work consists that the companies can rationally manage cash holdings, using negative shocks (signals) in the capital market, to expect them and without supposing the situations connected with financial restrictions.

scholarly journals DETERMINATION OF EXTREME TRAIN RUNNING PARAMETERS ALONG A RAILWAY LINE SEGMENT

Transport ◽  
2006 ◽  
Vol 21 (2) ◽  
pp. 123-130 ◽  
Author(s):  
Jonas Jonaitis
Keyword(s):  
Energy Consumption ◽  
Total Energy ◽  
Point Of View ◽  
Parameters Optimization ◽  
Optimal Parameters ◽  
Total Energy Consumption ◽  
Railway Line ◽  
Decision Variables ◽  
Motion Parameters

It is possible to select train‐car draft mass and traction vehicle parameters for technical speed νt along segment sk in such a way that unitary total energy consumption related to train‐car mass would be the lowest. Such running is called extreme running while traction vehicle parameters and train‐car mass are called optimal from the point of view of energy consumption. The optimization of traction vehicle parameters is possible if a mathematical traction vehicle model is added to the running program and then vehicle parameters are made variable and added to motion parameters as subsequent decision variables within train running program. Together with the train motion parameters optimization traction vehicle parameters should be optimized according to the criterion of unitary total energy consumption related to train‐car mass. Traction vehicle optimal parameters depend on train technical speed, length and profile of segment , as well as, on train‐car mass.

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