scholarly journals The concept of creating an expert system for selecting the optimal composition of a multicomponent mixture

2018 ◽  
pp. 42-46
Author(s):  
I.G. Muravyeva ◽  
D.N. Togobitskaya ◽  
N.G. Ivancha ◽  
A.S. Nesterov
Keyword(s):  
Blast Furnace ◽  
Expert System ◽  
Multicomponent Mixture ◽  
Raw Materials ◽  
Block Diagram ◽  
Component Composition ◽  
Chemical Transformations ◽  
Optimal Composition ◽  
Physical And Chemical

The paper presents the concept of creating an expert system for selecting the optimal composition of a multicomponent domain mixture, the basis of which will be: models of physical and chemical transformations of iron-containing materials, technological criteria, models of loading and distribution of charge materials, taking into account the distribution of the components of the charge over the cross section of the blast furnace. The system being developed differs from the well-known, based on the determination of the forecast indicators blast furnace by varying the component composition of the raw materials using calculations of material - thermal balance of the process. A block diagram of the solution of the problem of choosing the optimal composition of the charge is given.

scholarly journals Isolation and determination of some physical and chemical properties of polysaccharide from black elderberry flowers

2020 ◽  
pp. 95-101
Author(s):  
Игорь Анатольевич Сычев ◽  
Татьяна Викторовна Алимкина
Keyword(s):  
Medicinal Plant ◽  
Quantitative Determination ◽  
Raw Materials ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Plant Raw Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

Предложенный метод количественного определения восстанавливающих моносахаридов в полисахариде позволяет проводить стандартизацию лекарственного растительного сырья цветков бузины черной. На способ стандартизации лекарственного растительного сырья цветков бузины черной по содержанию восстанавливающих моносахаридов в полисахариде оформлено рационализаторское предложение № 1373 от 29.02.2016 г. РязГМУ. The proposed method for the quantitative determination of reducing monosaccharides in a polysaccharide makes it possible to standardize medicinal plant raw materials of black elderberry flowers. On the method of standardization of medicinal plant raw materials of black elderberry flowers in terms of the content of reducing monosaccharides in the polysaccharide, a rationalization proposal No. 1373 dated February 29, 2016 RyazSMU was issued.

scholarly journals Flame Photometric Determination of Alkali Elements in Raw Materials and By-product of Blast Furnace

1956 ◽  
Vol 4 (3) ◽  
pp. 14-22
Author(s):  
Ryohei ISHIDA ◽  
Yoshimasa FUJISHIRO ◽  
Hayata MANAKA ◽  
Yujiro HASHIMOTO ◽  
Hironori KANEKO
Keyword(s):  
Blast Furnace ◽  
Raw Materials ◽  
Photometric Determination ◽  
Alkali Elements

scholarly journals OPTIMIZATION OF RAW MIX COMPOSITION OF SEREBRYANSKY CEMENT PLANT

2020 ◽  
pp. 13-20
Author(s):  
M. Nikitina ◽  
A. Erygina ◽  
T.I. Timoshenko
Keyword(s):  
Cost Efficiency ◽  
Raw Materials ◽  
Cement Industry ◽  
Cement Clinker ◽  
Chemical Transformations ◽  
The Moment ◽  
Physical And Chemical ◽  
To Receive ◽  
Selection Of

now a top trend of technical development in the cement industry of Russia, is optimization of all technological repartitions of production. Obtaining the quality portlandtsement is multiple-factor process. It is influenced not only by the physical and chemical transformations of raw materials occurring during the firing of cement clinker, but also what will be the composition of the raw mixture and whether this mixture is prepared qualitatively. Work consists in a research and selection of an optimum compounding of raw mix, with the purpose to receive cement with high rates of quality. This direction will allow: first, to expand a source of raw materials, to process raw materials which go to dumps because in it is mute a large amount of quartz and impurity connections contains; secondly, to make small reconstruction of the line of preparation of raw mix. At the moment, the plant works on mixed mixtures of aluminosilicate raw materials, i.e. two types of aluminosilicate raw materials which are previously mixed in certain ratios therefore it affects on the accuracy of dispensing of components are used. Accuracy of dispensing of modern batchers, a component ± (1 … 2) %, is often insufficient. In this regard, the new option of optimum composition of mix is offered and investigated. This option of a "clean" mixing of components, will allow to improve process of mixing of initial raw materials, to operate process of drawing up proportions of mixes in a supply line of materials. And also it will allow to eliminate long-term deviations, guaranteeing the solution of problems at the earliest stage of their emergence. Receiving a qualitative ready-made product, reduction of costs for energy resources and cost efficiency of the proposed solution is result of this work

scholarly journals QUANTITATIVE DETERMINATION OF XANTHONE SUM IN TERMS OF MANGIFERIN IN AERIAN ORGANS OF SPECIES OF GENUS HEDYSARUM L. BY UV SPECTROPHOTOMETRY

2020 ◽  
pp. 179-186
Author(s):  
Dzhavgarat Ruslanovna Imachuyeva ◽  
Fatima Kazbekovna Serebryanaya ◽  
Ifrat Nazimovich Zilfikarov
Keyword(s):  
Quantitative Determination ◽  
Raw Materials ◽  
Chemical Properties ◽  
Raw Material ◽  
Uv Spectrophotometry ◽  
Highly Sensitive ◽  
Material Procurement ◽  
Physical And Chemical ◽  
Study Species

Preparing of the antiviral and antibacterial medicinal plants is a promising task of native pharmacy. In this regard, it is interesting to study species of the genus penny, namely Hedysarum caucasicum M.Bieb., Hedysarum grandiflorum Pall., Hedysarum daghestanicum Rupr. ex. Boiss., the regions of distribution, chemical composition and known pharmacological properties will allow to justify directions of their rational use, as well as creation of new phytopreparations of antiviral action on the basis of medicinal raw materials. During the complex pharmacognostic studies of three species of Hedysarum L. we have developed the method for isolation and quantitative determination of the sum of xanthones in terms of mangiferin by UV spectrophotometry. The technique takes into account the basic physical and chemical properties of xanthones, is characterized by reproducibility, high accuracy, simplicity of implementation, allows to carry out both screening evaluation of various raw objects containing mangiferin derivatives, as well as standardization of the prepared medicinal plant raw material of the penny. The developed methods are tested on the aerian organs of Hedysarum L. species, collected and dried taking into account the rules and requirements of drug raw material procurement. As a result, Hedysarum caucasicum M.Bieb herb (0.624%) was found to be the highest quantitative amount of xanthone sum in terms of mangiferin. The obtained results show the prospect of further research of the aerian part of the Hedysarum caucasicum M.Bieb. as an additional source of mangiferin. The method of quantitative determination of xanthone sum in the list for mangiferin in the above-ground part of Hedysarum caucasicum M.Bieb; Based on the obtained data, it has been found that the proposed technique is highly sensitive, reproducible and usable.

scholarly journals Technological Processes of Receiving Metals in The Conditions of Moderate Temperatures

2019 ◽  
Vol 8 (12) ◽  
pp. 1826-1828 ◽  
Keyword(s):  
Melting Point ◽  
Great Influence ◽  
Chemical Transformations ◽  
Moisture Evaporation ◽  
Thermodynamics And Kinetics ◽  
Recovery Processes ◽  
Metallurgical Furnaces ◽  
Physical And Chemical ◽  
Kinetics Of

In article questions of physical and chemical transformations of starting materials at their heating in metallurgical furnaces are considered. It first of all moisture evaporation, dissociation of the difficult connections, oxidizing and recovery processes, formation of fusible eutectics. An attention to interaction of oxides and sulfides with formation of the new connections having smaller melting point than initial components. It is shown that these connections are the beginning of formation of melts and actually define thermodynamics and kinetics of all process. Transition of firm components of fusion mixture to flux has a great influence on technological indicators of smelting of metal. Considering it, the research on establishment was conducted began courses of these of reaction and a possibility of determination of this criterion without direct the made experiments

Changes in the chemical composition of essential oils during storage

2019 ◽  
pp. 66-75
Author(s):  
I. A. Fedotova ◽  
A. E. Paliy ◽  
O. M. Shevchuk ◽  
S. A. Feskov
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Component Composition ◽  
Volatile Components ◽  
Chemical Transformations ◽  
Duration Of Storage ◽  
Mass Fractions ◽  
Main Component ◽  
Physical And Chemical

During the storage of essential oils, physical and chemical changes occur, leading to changes in the component composition, as a result of which the organoleptic and pharmacological properties of the oils change. The composition of the essential oils of Tagetes minuta L. and Cymbopogon flexuosus (Nees ex Steud.) W. Watson was studied by chromatography-mass spectrometry fresh and after storage. It was found that in T. minuta essential oil after storage for 6 months, the mass fraction of the main component, tagetenone, decreases due to the appearance of products of its oligomerization. Such changes lead to an improvement in the organoleptic properties of the oil. After storing the oil for 24 months, polymer forms of tagetones are formed in it and its viscosity is significantly increased, which makes its further use impossible. When storing C. flexyosus essential oil for 6 months, no changes were found in its chemical composition. After 24 months of storage, the mass fractions of cis and trans citral are reduced and undesirable components appear: isomeric forms of citrals, photocitral and caryophyllene oxide. Unpleasant notes appear in the aroma of the oil, and its quality decreases. Studies show that the chemical transformations of volatile components in essential oils do not always lead to a deterioration in their properties and depend on the species of the plant material and the duration of storage.

scholarly journals Quantification of noncellulosic polysaccharides and other components in vegetable raw materials

2018 ◽  
Author(s):  
Э.И. Евстигнеев
Keyword(s):  
Raw Materials ◽  
Component Composition ◽  
Special Equipment ◽  
Pure Cellulose ◽  
Extractive Substances ◽  
Agricultural Plants ◽  
Vegetable Raw Materials ◽  
Main Components ◽  
Preliminary Extraction

Предложен метод количественного определения нецеллюлозных полисахаридов в растительном сырье (древесине и сельскохозяйственных растениях). Он предусматривает определение в анализируемых образцах общего содержания полисахаридов и целлюлозы, а нецеллюлозные полисахариды определяются по разности. В качестве метода определения целлюлозы использовали азотно-спиртовый метод (метод Кюршнера), который отличается простотой и отсутствием необходимости предварительной экстракции образца, поскольку этанол является лучшим растворителем экстрактивных веществ среди индивидуальных растворителей. Для корректировки содержания целлюлозы Кюршнера на «чистую» целлюлозу в ней бромид-броматным методом определяются остаточные пентозаны. Как показали результаты анализа образцов с известным содержанием нецеллюлозных полисахаридов, разработанный метод позволяет определять указанные компоненты с высокой точностью (относительная ошибка определения не превышает 4,3%). Кроме того, в работе предложена схема определения основных компонентов растительного сырья. Она включает в себя определение полисахаридов, целлюлозы, нецеллюлозных полисахаридов, лигнина, экстрактивных веществ и золы. С ее помощью можно достаточно полно охарактеризовать компонентный состав сырья растительного происхождения, не прибегая к использованию специального оборудования. С помощью новой схемы анализа определены различия в содержании и составе полисахаридов древесины хвойных и лиственных пород. The method of quantitative determination of noncellulosic polysaccharides in vegetable raw materials (wood and agricultural plants) is offered. He provides determination in the analyzed samples the general content of polysaccharides and cellulose, and noncellulosic polysaccharides are determined by a difference. As a method of determination of cellulose used Kürschner method which differs in simplicity and lack of need of preliminary extraction of a sample as ethanol is the best solvent of extractive substances among individual solvents. For correction of content of Kürschner cellulose on «pure» cellulose residual pentosans are determined by bromide bromated method. As have shown results of the analysis of samples with the known content of noncellulosic polysaccharides, the developed method allows to determine the specified components with high precision (the relative error of definition doesn't exceed 4.3%). Besides, in work the scheme determination of the main components of vegetable raw materials is offered. It includes determination of polysaccharides, cellulose, noncellulosic polysaccharides, lignin, extractive substances and ashes. With her help it is possible to characterize rather fully component composition of vegetable raw materials without resorting to use of the special equipment. Differences in contents and composition of polysaccharides of wood of coniferous and deciduous breeds are defined by the new scheme of the analysis.

scholarly journals Geotechnological methods of gas extraction from technogenic coal deposits

2019 ◽  
Vol 109 ◽  
pp. 00037
Author(s):  
Eduard Kliuiev ◽  
Iryna Sapunova ◽  
Valerii Ivanov
Keyword(s):  
Raw Materials ◽  
Gas Extraction ◽  
Chemical Transformations ◽  
Thermal Impact ◽  
Solid Carbon ◽  
Coal Processing ◽  
Chemical Methods ◽  
New Methods ◽  
Coal Deposits ◽  
Physical And Chemical

The article presents an analysis of modern geotechnological methods of gas extraction from coal technogenic deposits. Special attention was focused to surface methods complex resource development, which concentrated in filled rock dumps and sludge accumulators of coal-processing factories. The work describes physical-and-chemical methods of thermal impact on solid carbon-contained raw materials, which is considered as a binary mixture of coal and rock, in an oxygen-free medium or with the use of oxidants. The article presented the researches results of catalytic transformations taking place in the structure of a coal substance. Various versions of the use of catalysts in the processes of physical and chemical transformations of coal were proposed. The conducted researches allow to analyze the existing methods of impact on the mine medium identify the most perspective directions for the development of new methods in the field of geotechnological processes of gas extraction from coal technogenic deposits.

scholarly journals Complex of methodologies and laboratory equipment for determination of coke and slags properties in smelting zone of blast furnace

2019 ◽  
Vol 75 (2) ◽  
pp. 182-188
Author(s):  
M. I. Stukov ◽  
A. Yu. Chernavin ◽  
V. A. Kobelev ◽  
D. A. Chernavin ◽  
K. P. Ivashinenko
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Carbon Materials ◽  
Raw Materials ◽  
Softening Temperature ◽  
Slow Heating ◽  
Electric Resistance ◽  
Air Blast ◽  
Reduction Treatment

Information about character of burden materials behavior inside a blast furnace at its different horizons enables to increase control efficiency of BF heat running. The elaborated complex of methodologies for carbon materials and iron ore raw materials properties study enables to simulate their behavior at the horizon of iron ore materials reducing, in the viscoplastic zone, at the horizon of iron ore raw materials smelting and its interaction with coke filling. A vertical electric resistance shaft furnace with a tube carbon heater was used as a base equipment for simulation of burden behavior in the reduction zone and smelting zone, as well as for simulation of iron ore burden melt outflow through coke filling. Burden materials preparation to the experiment concluded in crushing of iron ore component followed by 3–5 mm fraction extraction and a mixing it with 3–5 mm fraction of brown coal semi-coke in relation 2:1 for further heating-reduction treatment. The heating-reduction treatment of the mixture charged in the electric furnace simulates the reducing zone and is carried out by a slow heating of the iron ore component and reducing agent mixture from 20 up to 980–1020 ºС. The methodology of determination of lump carbon materials combustibility in the highly heated air blast flow was developed for the complex of equipment based on the shaft electric resistance furnace and aimed at testing of burning process of carbon samples of technological fuels. The combustibility was determined under conditions of burnt sample heating in the temperature range from 500 up to 1500 °C with an accuracy of ±10 °С. The temperature of air blast flow (21 % vol. of oxygen at natural moisture) was set in the range from 120 up to 1200 °С and was kept with an accuracy of ±12 °С. The burnt sample mass, volume of air blast and its velocity was correlated to obtaining of complex non-dimensional Re factor (Reinolds number) more than 100, that guaranteed a reliable process running in the combustion area with no risk of transferring to gasification process. Based on GOST 26517–85 (“Iron ores, sinter and pellets”) a methodology was elaborated for determining of parameters of iron ore materials status in the viscoplastic zone. The methodology comprises heating of preliminary reduced sample of a tested iron ore material in an inert gas and determination of softening temperature and smelting end by a hard rod sinking into the material layer under external pressure action. The temperature at which the layer shrinkage reaches level of 2% during heating, was taken as the softening temperature of the iron ore material. The sinking of the rod into the material by 80% was taken as the temperature of the beginning of the material melting. The interval softening-melting was determined as the difference between melting temperature and softening temperature (at sample shrinkage by 2 %).

Sign in / Sign up

Export Citation Format

Share Document