scholarly journals INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LOW-CALCIUM BUTTERMILK COPRECIPITATE ON ITS RHEOLOGICAL CHARACTERISTICS

2020 ◽  
Author(s):  
Deinychenko G. ◽  
Zolotukhina I. ◽  
Yudina T.
Keyword(s):  
Rheological Characteristics ◽  
Technological Parameters ◽  
Low Calcium

Kurgan Clays in the Production of Ceramic Materials

2020 ◽  
Vol 299 ◽  
pp. 3-7 ◽  
Author(s):  
M.A. Sapozhnikova ◽  
Irina A. Pavlova
Keyword(s):  
Particle Size ◽  
Mechanical Strength ◽  
Size Composition ◽  
Ceramic Materials ◽  
Raw Material ◽  
Rheological Characteristics ◽  
Technological Parameters ◽  
Drying Behavior ◽  
Material Sample ◽  
Technological Study

The properties of overburden rocks in the extraction of dolomite in the form of red-burning clay from the Kurgan region are investigated to determine its suitability in the production of various types of ceramic materials and products. A full technological study of the clay raw material sample was carried out: the mineral, chemical, particle size composition, as well as plasticity, drying behavior, attitude to sintering, and mechanical strength after burning. It is examined how rheological characteristics affect the control of the technological process. The suitability of clay under consideration, both in majolica ceramics and ceramic bricks production, has been established. The technological parameters for the ceramic bricks production are developed.

scholarly journals Supramolecular impactmechanism of polycarboxylate superplasticizers on controlled hardening building nanocomposites

2020 ◽  
Vol 12 (5) ◽  
pp. 250-255
Author(s):  
R.M. Khalikov ◽  
O.V. Ivanova ◽  
L.N. Korotkova ◽  
D.A. Sinitsin
Keyword(s):  
Molecular Weight ◽  
Functional Groups ◽  
Building Materials ◽  
Solid Phase ◽  
Linear Chain ◽  
Good Control ◽  
Rheological Characteristics ◽  
Technological Parameters ◽  
Technological Characteristics ◽  
Repulsive Forces

Introduction. The use of modifying nano-additives in the production of binding building materials is one of the most effective ways to control the technological parameters of concrete by conducting good control of the rheological characteristics reliability. Plasticizing additives increase the water-holding capacity of building compositions, which leads to the dispersed nanosystems stability. This article is focused on examining the physical and chemical mechanisms of the supramolecular effects of polycarboxylate ethers on technological and rheological characteristics of cement nanobinders. Methods and materials. This study describes controlled hardening processes of concrete nanocompositions with demanded technological characteristics in the presence of highly effective plasticizers. Moreover, this paper carries out the analysis of the innovative trends in regulating the consistency of building nanocomposites with the use of new comb-like polycarboxylate esters, which as superplasticizers allow to purposefully influence the kinetics of structure formation of cement nanocomposites. Results. Electrostatic and steric repulsion mechanisms, as well as the dispersing effects of innovative and traditional plasticizing nanoparticles, affect the adsorption and diffusion layers of the hydrated cement nanobinders ultrastructure. The most effective plasticizing properties are shown by comb-like polycarboxylate esters (CPE) with a linear chain molecular weight of ≈12000 g/mol and a length of side branches which correspond to a molecular weight of ≈750 g/mol. The supramolecular mechanism of nanosteric van der Waals repulsive forces begins to be detected at a distance of ≈11 nm, and the elasticity of the lateral branches of innovative CPE is ≈ 5 nm. Individual segments of CPE macromolecules enter the diffuse layer of dispersed nanosystems due to lateral interactions of anions of functional groups, hydrophobic fragments, etc.; they enhance the plasticizing effect of cement binders in concrete nanocompositions. Discussion. When using superplasticizing CPE, the density of concrete nanocomposites can be increased by reducing the amount of water mass to the cement mass ratio to the optimal 0.3; at the same time, technological pumpability and reliability control of the joint hardening kinetics with fillers are preserved within the framework of the technological problems system solutionsconcept. Supramolecular interaction of «anchoring» functional groups of polyacrylic acid containing solid phase cations of cement microparticles, fractal clusters of calcium hydrosilicates and simultaneous steric stabilization of polyethylene glycol radicals give the necessary rheological characteristics to construction nanocompositions and allow the construction of high-strength 55÷80 MPa building materials. Conclusions. The branched comb-like nanostructure of polycarboxylate esters exhibits effective technological characteristics of superplasticizers for concrete, building mortars and dry building mixes

scholarly journals EVALUATING THE INFLUENCE OF COMPONENT COMPOSITION OF BINDING FLUID ON THE DEPTH OF ITS PENETRATION INTO THE UNCONSOLIDATED RESERVOIR OF THE PRODUCTIVE FORMATION

2018 ◽  
pp. 38-43
Author(s):  
R. A. Gasumov ◽  
E. Yu. Kukulinskaya ◽  
Yu. K. Dimitriadi
Keyword(s):  
Chemical Method ◽  
Component Composition ◽  
Fluid Injection ◽  
Rheological Characteristics ◽  
Technological Parameters ◽  
Depth Of Penetration ◽  
Fluid Penetration

The depth of penetration of the binding fluid into the formation is one of the factors to determine the effectiveness of semiconsolidated reservoir stabilization by a chemical method. This value depends on the properties of the productive formation, the component composition and rheological characteristics of the binding fluid, as well as the technological parameters of its injection into the unconsolidated reservoir. The article presents the results of the interrelation of the above factors on the value of fluid penetration radius, the optimum rheological characteristics and the parameters of the binding fluid injection are established.

scholarly journals RESEARCH OF THE INFLUENCE OF THE COMPONENTS OF CHOCOLATE GLAZES ON THEIR RHEOLOGICAL CHARACTERISTICS

2021 ◽  
pp. 68-74
Author(s):  
Svetlana Bukhkalo ◽  
Mariia Zemelko
Keyword(s):  
Cocoa Butter ◽  
Production Technology ◽  
Partial Replacement ◽  
Rheological Characteristics ◽  
Food Technology ◽  
Technological Parameters ◽  
Alkaline Catalyst ◽  
Quality Cost ◽  
Oxidation Processes ◽  
Scientific Justification

Chocolate glaze is a large-tonnage component of various branches of food technology, which also performs important technological tasks, namely: helps to slow down oxidation processes; improving emulsifying and dispersing properties; prevents hardening of certain types of products; prevents the ingress of moisture, which increases the shelf life of the confectionery, etc. At the first stage, the main problems of production of the confectionery industry are determined - they require a scientific justification for the choice of competitive components of production technology, taking into account quality-cost indicators. Next, for the specified parameters of the production technology determine the components of the formulation of chocolate glazes. As an example, the results of studies of selected technological parameters of some compositions of chocolate glazes, a comparative analysis of their effectiveness on the rheological properties of compositions based on cocoa butter: alternative surfactants – standard lecithin – alternative surfactants - monoglycerides and a mixture of mono-, di- and triglycerides from palm oil by glycerolysis in the presence of an alkaline catalyst. Analysis of the system of results and calculation equations allowed to offer recommendations for the intensification of production processes: effectively reduces the viscosity of compositions based on cocoa butter, which, in turn, makes it possible to use them for partial replacement of lecithin in the manufacture of confectionery.

scholarly journals Dynamics of Active and Titratable Acidity in Bieno Cheese

2021 ◽  
Vol 8 (6) ◽  
pp. 232-237
Author(s):  
Gordana Dimitrovska
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Experimental Research ◽  
Food Production ◽  
Titratable Acidity ◽  
Rheological Characteristics ◽  
Geographical Indication ◽  
Technological Parameters ◽  
Traditional Production ◽  
The Republic

Experimental research describes the autochthonous traditional production of bieno cheese and its importance in conditions of globalization and industrialization in food production. The purpose of this research was to present the technology of three varieties of indigenous bieno cheeses (A, B, and C) in the Mariovo region, in the Republic of North Macedonia, and to monitor the dynamics of active and titratable acidity as important parameters in the technological process. During the research, the changes of these parameters of the three variants (A, B, and C) of cheeses in different stages of maturation were monitored (in curd, cheese after dry ripening, cheese after dry salting, the 20th day of ripening, and the 45th day of ripening). The rheological properties of the cheese are greatly influenced by the active (pH) and titratable (0SH) acidity. During the ripening of cheeses under the influence of lactic acid bacteria, the biggest changes occur in lactose, which transforms lactose into lactic acid and other organic acids that play an important role in the formation of sensory and rheological characteristics of cheeses. The displayed technological parameters are of great importance for the bieno cheeses and can serve in the direction of standardization of this cheese and its protection with a designation of origin or a geographical indication based on the source technology. Keywords: Bieno cheese, technology, active and titratable acidity.

A possibility of using nickel concentrate, obtained as a result of hydrometallurgical enrichment of manganese-containing raw materials, at steel alloying

2020 ◽  
Vol 76 (7) ◽  
pp. 709-715
Author(s):  
O. Yu. Kichigina
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Selective Extraction ◽  
Technological Parameters ◽  
Nickel Iron ◽  
Nickel Recovery ◽  
Nickel Concentrate ◽  
Steel Alloying ◽  
High Degree ◽  
Comprehensive Processing

At production of stainless steel expensive alloying elements, containing nickel, are used. To decrease the steel cost, substitution of nickel during steel alloying process by its oxides is an actual task. Results of analysis of thermodynamic and experimental studies of nickel reducing from its oxide presented, as well as methods of nickel oxide obtaining at manganese bearing complex raw materials enrichment and practice of its application during steel alloying. Technology of comprehensive processing of complex manganese-containing raw materials considered, including leaching and selective extraction out of the solution valuable components: manganese, nickel, iron, cobalt and copper. Based on theoretical and experiment studies, a possibility of substitution of metal nickel by concentrates, obtained as a result of hydrometallurgical enrichment, was confirmed. Optimal technological parameters, ensuring high degree of nickel recovery out of the initial raw materials were determined. It was established, that for direct steel alloying it is reasonable to add into the charge pellets, consisting of nickel concentrate and coke fines, that enables to reach the through nickel recovery at a level of 90%. The proposed method of alloying steel by nickel gives a possibility to decrease considerably steel cost at the expense of application of nickel concentrate, obtained out of tails of hydrometallurgical enrichment of manganese-bearing raw materials, which is much cheaper comparing with the metal nickel.

Operation intensification methods of aggressive industrial sewage neutralization facilities

2020 ◽  
Vol 76 (11) ◽  
pp. 1149-1153
Author(s):  
N. S. Tsarev ◽  
V. I. Aksenov ◽  
I. I. Nichkova
Keyword(s):  
Cold Water ◽  
Specific Productivity ◽  
Technological Properties ◽  
Technological Parameters ◽  
Preliminary Heating ◽  
Sediment Treatment ◽  
Circulating Water ◽  
Equipment Operation ◽  
Sediment Volume ◽  
Industrial Sewage

To neutralize the waste pickling solutions and rinsing water, resulting from cleaning metal products s surface of rust by acids solutions, lime is used. Being cheap, this method of sewage neutralization has considerable drawbacks. Forming in the technological pipes strong gypsum depositions and low specific productivity of the equipment for sediment dewatering are most significant of them. Characteristic of aggressive industrial sewage, formed at pickling of ferrous metals presented. Methods of elimination of drawbacks of industrial sewage neutralization by lime considered, including stabilization of neutralized industrial sewage and control of properties of the sediment formed. It was noted, that stability of the circulating water can be provided by accelerating of crystallization of the forming gypsum sediments by introducing in it fine priming powder and heating the neutralized water up to 65-70 °С followed by thermal softening of a part of circulating water, removed out of the circulating system. It was shown, that the heating of the water and the ongoing changes of the composition and properties of the sediment result in decrease of filtration resistance 2-3 folds, increase of deposition speed 3-4 folds and decrease the sediment volume 1.5-2 folds comparing with lime neutralization in cold water. Calculated dozes of lime at the heating were taken the same as at the regular lime neutralization. Elimination of the circulating water oversaturation by bi-water gypsum can be reached also by addition into the water of powder-like gypsum pulp - priming powder for microcrystals of the gypsum, followed by aeration during 30-40 min. This method was tested under industrial conditions. Technological properties of the forming sediment can be improved by sediment treatment by flocculants and preliminary heating of the neutralized water up to 65-70 °С. Control of technological properties of the sediment is done by addition of flocculants and heating of the neutralized water. Recommendations for improving operation of the neutralization facilities presented with indicating particular technological parameters of the equipment operation for sewage and sediment treatment. 

APPLYING THE ISF TECHNOLOGY TO PRODUCE THE CAR PART MODELS

2010 ◽  
Vol 13 (4) ◽  
pp. 91-98
Author(s):  
Tuan Dinh Phan ◽  
Binh Thien Nguyen ◽  
Dien Khanh Le ◽  
Phuong Hoang Pham
Keyword(s):  
Rapid Prototyping ◽  
Incremental Sheet Forming ◽  
Cad Model ◽  
Post Processing ◽  
Technological Parameters ◽  
Batch Production ◽  
Complex Products ◽  
3D Cad ◽  
Real Size ◽  
Single Batch

The paper presents an application the research results previously done by group on the influence of technological parameters to the deformation angle and finish surface quality in order to choose technology parameters for the incremental sheet forming (ISF) process to produce products for the purpose of rapid prototyping or single-batch production, including all steps from design and process 3D CAD model, calculate and select the technological parameters, setting up manufacturing and the stage of post-processing. The samples formed successfully showed high applicability of this technology to practical work, the complex products with the real size can be produced in industries: automotive, motorcycle, civil...

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