Choice of Efficient Technology for Aged Enrichment Tailings Processing

2019 ◽  
Vol 946 ◽  
pp. 558-563
Author(s):  
Almaz Kozhonov ◽  
Zheenayym Maymanova ◽  
Aleksei Kritskii
Keyword(s):  
Appropriate Technology ◽  
Gravity Separation ◽  
Raw Material ◽  
Material Base ◽  
Initial Material ◽  
Efficient Technology ◽  
Waste Products ◽  
Enrichment Plant

The article is devoted to the development of an efficient technology for the processing of aged tailings of the «Solton-Sary» enrichment plant in Kyrgyzstan. Based on the detailed investigation of initial material, authors select most appropriate technology for processing of technogenic material, considering through gravity separation, flotation and hydrometallurgical methods of processing. The methods of sequential gravity separation/flotation scheme of enrichment and direct cyanidation of initial ore at different regimes are analyzed; advantages of aged tailings agitation leaching are established. Research, presented in the article, could be useful for enrichment plants, which are developing technologies of the waste products processing in order to increase the raw material base.

scholarly journals Prospective directions for development of metallurgy and materials science of steel

2017 ◽  
Vol 89 (10) ◽  
pp. 1553-1565 ◽  
Author(s):  
Alexander I. Zaitsev
Keyword(s):  
Materials Science ◽  
Raw Material ◽  
Material Base ◽  
Efficient Technology ◽  
Chemical Methods ◽  
Current State ◽  
Physico Chemical ◽  
Metallic Inclusions ◽  
Reducing Costs ◽  
Qualitative Characteristics

AbstractThe features of current state of metallurgical technology and materials science of mass high-grade steels are viewed. A promising direction for principle improvement of the complex of properties and qualitative characteristics of steel including those, which are difficult to combine, is shown. It is the development of adequate physico-chemical methods of prediction and efficient technology methods of management of non-metallic inclusions, forms of presence of impurities, phases precipitations, structural state, including uniformity over the volume of metal. Additionally this approach allows reducing costs and expanding the raw material base. Its effectiveness is illustrated by the results of research carried out for a number of groups of mass high-quality steels.

Recovery of Polymer Waste in the Production of Ceramics Veneer with a Self-glazing Effect

2021 ◽  
Vol 25 (6) ◽  
pp. 20-25
Author(s):  
E.A. Pavlycheva ◽  
E.S. Pikalov ◽  
O.G. Selivanov
Keyword(s):  
Energy Efficiency ◽  
Titanium Dioxide ◽  
Boric Acid ◽  
Water Absorption ◽  
Frost Resistance ◽  
Raw Material ◽  
Material Base ◽  
Vitreous Phase ◽  
Waste Products ◽  
Polymer Waste

The results of studies on the development of the composition of the charge based on low-plasticity clay using waste products from the consumption of products made of unplasticized polyvinyl chloride are presented. In addition, boric acid as a flux and titanium dioxide as a source of the vitreous phase are introduced into the composition of the charge to obtain the effects of vitrification of the surface of ceramic particles and self-glazing of the surface of the samples. The dependences of the main properties of ceramics veneer on the ratio between the amounts of polymer waste and titanium dioxide with the introduction of 5% by weight of boric acid have been established. The quantities of charge components that ensure the energy efficiency of the developed ceramics while ensuring strength, water absorption and frost resistance at a level corresponding to the requirements for products for brick cladding of buildings and structures have been determined. The use of this composition expands the range and raw material base for the production of ceramics veneer, allow you to dispose of polymer waste at any degree of purity and destruction in sufficiently large quantities.

scholarly journals STUDY OF AMINOACID COMPOSITION OF THE HARICOT BEAN SHELLS

THE BULLETIN ◽  
2020 ◽  
Vol 5 (387) ◽  
pp. 48-55
Author(s):  
І. Kriukova ◽  
◽  
S. Gubar ◽  
I. Vladymyrova ◽  
T. Tishakova ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Amino Acid Composition ◽  
Acid Composition ◽  
Herbal Medicines ◽  
Hplc Method ◽  
Raw Material ◽  
Material Base ◽  
Waste Products ◽  
Water Extracts

Commonly, the production of herbal medicines is more advantageous economically than chemical synthesis. Agricultural crops, having sufficient raw material base, are of main interest. In this respect the shells of haricot bean (Phaseolus vulgaris L. (Fabaceae)), that are waste products of beans, are of special interest. Due to the absence of regulatory documents for this kind of drug raw material in Ukraine the development of standardization parameters for the raw material of haricot bean is a very topical. Pharmacotherapeutic action of this drug raw material is caused by the presence of amino acids, proteins, macro- and microelements as well as flavonoids. There are medicines at the pharmaceutical market of Ukraine that was produced from the haricot bean: «Sadifit» (ZAO «Liktravy», Ukraine), «Arphazetin» (ZAO Pharmaceutical plant «Viola», Ukraine), «Hepatophyt» (LLC «Research and production pharmaceutical company «AIM», Ukraine), «Shells of haricot bean» (ZAO «Liktravy», Ukraine). Medicines are introduced to the market in the form of medicinal herbs mixture that's why main method of application is a preparation of restorative drinks, tinctures, teas. In light of this, study of amino acid composition in the water extracts from raw material is reasonable. Research of qualitative and quantitative amino acid composition of 5 lots of the shells of haricot bean was carried out by HPLC method. This raw material was harvested in different regions of Ukraine over a period of 2014 – 2016. 16 amino acids were identified in the water extracts of the shells of haricot bean. Glutamic acid (1.60 – 5.56 ´µg/100 mg), L-alanine (1.41 – 2.23 µg/100 mg), L-arginine (0.65 – 2.12 µg/100 mg) had the greatest content in the investigated samples. D-serine (0.04 – 0.13µg/100 mg) and D,L-methionine (0.02 – 0.43 µg/100 mg) had the lowest quantity in the investigated samples. Sufficiently high content of amino acids makes it possible to consider them as potential substances-markers at the development of assay procedure for the standardization of raw material.

scholarly journals CHEMICAL-TECHNOLOGICAL PROCESSING OF COALS OF VARIOUS REGIONS OF UKRAINE

2019 ◽  
pp. 8-16 ◽  
Author(s):  
I.V. Shulga ◽  
D.V. Miroshnichenko ◽  
V.I. Rudyka ◽  
A.A. Tsymbal
Keyword(s):  
Process Design ◽  
Energy Demand ◽  
Impurity Content ◽  
Raw Material ◽  
Material Base ◽  
Waste Products ◽  
Motor Fuels ◽  
Technological Processing ◽  
Design Options ◽  
Generator Gas

The raw material base of gasification based on en ergetic coals of Western Donbass of the DG brand is considered. Gasification parameters (quantity and composition of the blast, temperature, pressure, dimensions and number of reactors, quantity and properties of the gas produced, including its composition, heat of combustion, impurity content) are determined for various technological process design options; energy demand (steam, electricity, oxygen, water); the amount of as sociated products, waste products and generated wastewater. It is shown that the best performance is achieved when using technologies in volving the gasification of coal in the stream. The resulting generator gas is in tended to be used for the production of motor fuels. The volume of coal processing is 550 thousand tons per year. Ref. 12, Tab. 6.  

The interasin raw material base of coke-chemical production of Ukraine: Problems of charge formation, its preparation and coking

2018 ◽  
Vol 5 (6) ◽  
pp. 3-7 ◽  
Author(s):  
E.S. Popov ◽  
V.I. Gavrilyuk ◽  
N.V. Mukina ◽  
E.T. Kovalev ◽  
I.D. Drozdnik ◽  
...  
Keyword(s):  
Raw Material ◽  
Material Base ◽  
Chemical Production ◽  
Charge Formation

scholarly journals Rheological and Microbiological Characteristics of Hops and Hot Trub Particles Formed during Beer Production

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 681
Author(s):  
Monika Sterczyńska ◽  
Marek Zdaniewicz ◽  
Katarzyna Wolny-Koładka
Keyword(s):  
Rheological Properties ◽  
Raw Materials ◽  
Raw Material ◽  
Microbiological Analysis ◽  
Waste Products ◽  
Low Viscosity ◽  
Post Process ◽  
High Shear Rates ◽  
Different Temperatures ◽  
Beer Production

During the production of beer, and especially beer wort, the main wastes are spent grain and hot trub, i.e., the so-called “hot break.” Combined with yeast after fermentation, they represent the most valuable wastes. Hot trub is also one of the most valuable by-products. Studies on the chemical composition of these sediments and their rheological properties as waste products will contribute to their effective disposal and even further use as valuable pharmaceutical and cosmetic raw materials. So far, hot trub has been studied for morphology and particle distribution depending on the raw material composition and beer wort extract. However, there are no preliminary studies on the rheological properties of hot trub and hops. In particular, no attention has yet been paid to the dependence of these properties on the hop variety or different protein sources used. The aim of this study was to examine the effect of different hopping methods on hot trub viscosity and beer wort physicochemical parameters. Additionally, the hop solutions were measured at different temperatures. A microbiological analysis of hop sediments was also performed to determine the post-process survival of selected microorganisms in these wastes. For manufacturers of pumps used in the brewing industry, the most convenient material is that of the lowest viscosity. Low viscosity hot trub can be removed at lower velocities, which reduces costs and simplifies washing and transport. The sediments also had similar equilibrium viscosity values at high shear rates.

scholarly journals Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste

2021 ◽  
Vol 18 (12) ◽  
pp. 6664
Author(s):  
María Isabel Romero-Hermida ◽  
Antonio María Borrero-López ◽  
Vicente Flores-Alés ◽  
Francisco Javier Alejandre ◽  
José María Franco ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mineralogical Composition ◽  
Barium Sulphate ◽  
Negative Influence ◽  
Raw Material ◽  
Porous System ◽  
Waste Products ◽  
Liesegang Rings ◽  
Carbonation Process ◽  
Ultrasonic Propagation

This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a lime putty obtained from the treatment of phosphogypsum with sodium hydroxide. The physical, rheological and mechanical properties of this phosphogypsum-derived mortar have been studied, as well as the mineralogical composition, microstructure by scanning electron microscope (SEM) and curing process by monitoring carbonation and ultrasonic propagation velocity. Considering the negative influence of sulphates on the hardened material, the behaviour of the material after sulphates precipitation by adding barium sulphate was additionally tested. Carbonation progressed from the outside to the inside of the specimen through the porous system by Liesegang rings patterns for mortars with soluble sulphates, while the carbonation with precipitated sulphates was controlled by diffusion-precipitation. Overall, the negative influence of low-sulphate contents on the mechanical properties of mortars was verified. It must be highlighted the importance of their precipitation to obtain adequate performance.

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