Ash and Slag Waste – Secondary Raw Materials with Benefits for the Environment

2021 ◽  
Author(s):  
M. S. Anastasov ◽  
S. P. Alexandrov ◽  
A. V. Shestov ◽  
Yu. S. Ryabova
Keyword(s):  
Raw Materials ◽  
Secondary Raw Materials ◽  
Ash And Slag Waste ◽  
Slag Waste

scholarly journals Organizational, economic and legal aspects of creating and developing technological complexes on recycling ash and slag waste in construction and other products

Vestnik MGSU ◽  
2019 ◽  
pp. 756-773
Author(s):  
Igor S. Kozhukhovsky ◽  
Evgeny G. Velichko ◽  
Yury C. Tselykovskiy ◽  
Eduard S. Tshovrebov
Keyword(s):  
System Analysis ◽  
Raw Materials ◽  
Legal Aspects ◽  
Economic Incentives ◽  
Economic Problem ◽  
Secondary Raw Materials ◽  
Ash And Slag Waste ◽  
Optimal Resolution ◽  
Methodological Principles ◽  
Slag Waste

Introduction. The study gives a comprehensive estimation of alternate solutions of an actual significant domestic ecological and economic problem of handling large-tonnage industrial waste: environmental contamination as a result of growing volumes of ash and slag waste (ASW), usage of ecologically dangerous objects (dumps of ashes and slag), low level of involving processed ASW as a valuable secondary resource in economic circulation. Materials and methods. The domestic and foreign publications on the problems of ASW handling, on methods and technologies of using secondary resources from the recycled ASW for production of various construction and other goods, on manufacturing organisation were analysed. The system analysis of approaches, methods and ways of the solution of the scientific problem put in the study is chosen as a research method. Results. Priority areas of the handling ASW as useful secondary raw materials with the view of as much as technically possible, ecologically admissible and economically expedient involvement of such waste in economic circulation were generated. Methodological approaches to creation of the organisational, legal and economic mechanism of regulating the ASW handling were suggested. The following concepts were formulated: “raw materials from ashes and slag”, “«from ashes and slag”, “recycling of ash and slag waste”. A set of standardization documents and methodical materials necessary for development in the considered sphere is recommended. Measures of the state support, regulation and economic incentives on the ASW recycling into raw and materials and their efficient usage as the needed goods for modern demands of industrial branches and economy sectors. Conclusions. The scientific research novelty consists in offered by the authors the scientific approach to formation of fundamental strategic methodological principles of the handling ASW as valuable secondary raw materials in the scope of economic legal relations, practical solutions on the effective optimal resolution of the assigned actual ecological and economic problem on the Russian Federation national scale.

INDUSTRIAL WESTE ACCOUNTING ON EXAMPLE ASH DUMPS

2021 ◽  
Vol 4 (4) ◽  
pp. 182-188
Author(s):  
T. S. BUDINA ◽  
◽  
N. Kh. KURBANOV ◽  
L. M. PROKOFIEVA ◽  
V. G. SHIYKO ◽  
...  
Keyword(s):  
Production Efficiency ◽  
Raw Materials ◽  
Accurate Determination ◽  
Accounting System ◽  
Secondary Material ◽  
Ash And Slag Waste ◽  
Sufficient Degree ◽  
Slag Waste ◽  
Financial Result

The article is devoted to the problems of accounting for industrial waste (technogenic deposits) on the example of ash and slag dumps. The influence of the organization of accounting for technogenic deposits on the indicators of cost, profit, and profitability of the enterprise, if these wastes are sold or used as secondary material, is studied. It is proved that the accounting system should accumulate and form such information that would allow with a sufficient degree of accuracy to determine the economic efficiency of the integrated use of raw materials, would aim at identifying reserves for increasing production efficiency. According to the authors, accounting under IFRS provides a more accurate assessment of ash and slag waste, which ultimately will allow the most accurate determination of the financial result from their further use.

scholarly journals Analytical evaluation and systematization of technologies for extraction of rare metals from production waste

2021 ◽  
Vol 311 ◽  
pp. 09005
Author(s):  
L. Ya. Shubov ◽  
I. G. Doronkina ◽  
O. N. Borisova ◽  
L. M. Tyger ◽  
T. R. Lyubetskaya
Keyword(s):  
Permanent Magnets ◽  
Raw Materials ◽  
Liquid Waste ◽  
Acid Leaching ◽  
Production Waste ◽  
Rare Metals ◽  
Resource Saving ◽  
Alumina Production ◽  
Ash And Slag Waste ◽  
Slag Waste

The article is a message containing systematized information on resource-saving technologies as the basic for involving metal-containing secondary raw materials in the economic turnover. The set of independent technologies arranged in a certain sequence that solve the problems of resource saving allows us to compare the specific features and effectiveness of the use of each of them, the details and features of the processes. It is shown that the following can be the main sources of rare metals and REE: phosphogypsum (REE, Sr); ash and slag waste from TPPs, ash and slag waste (REE, Ti, Sc); metallurgical slags (Ge, Be, Se, Te, V); sulfuric acid dust (Se, Te); alumina production waste - red mud (Sc, REE); liquid waste from sulphate production of titanium dioxide (Sc, Ti); refinery dust bins (Se, Te); wastes from production of permanent magnets (Nd, Sm). It is noted that the technology uses beneficiation methods, acid leaching and ion-exchange concentration, biotechnology, electrolysis, heat treatment, a combination of different methods. To assess the quality of man-made raw materials and their suitability for complex processing and utilization, the article uses the methodology of analytical research of a set of patented technological solutions (technological samples were taken from real man-made deposits).

Ash-Slag Waste of the Coal-Fired Thermal Power Plant as a Resource for the Construction Industry

2021 ◽  
Vol 1038 ◽  
pp. 290-295
Author(s):  
Viktor Kolokhov ◽  
Lina Moroz ◽  
Andrey Romin ◽  
Volodymyr Kovregin
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Raw Materials ◽  
Thermal Power ◽  
Metallurgical Industry ◽  
Ash And Slag Waste ◽  
Technical Properties ◽  
Concrete Materials ◽  
Slag Waste ◽  
Wide Potential

The article presents a study of the physical and technical properties of ash and slag waste Coal Power Plant. The main problem when using ash-slag mixtures is the variability of the particle size distribution of the material. Determining the characteristics of slag stored in the dumps of thermal power plants will help to choose the separation methods of this material, to address the disposal and accumulation of industrial waste, to expand the scope of their application. The obtained research results of physical and technical properties of waste of the Coal TPP testify to wide potential in the further use in many branches of the industry. Possible applications include fillers for concrete, materials for sandblasting (abrasive material), raw materials for the metallurgical industry, additives for the manufacture of binders, etc.

Ceramic Bricks of Semi-Dry Pressing with the Use of Fusible Loams and Non-Traditional Mineral Raw Materials

2020 ◽  
Vol 299 ◽  
pp. 252-257
Author(s):  
Victoria A. Gurieva ◽  
Aleksandr V. Doroshin ◽  
Viktor V. Dubineckij
Keyword(s):  
Power Plants ◽  
Raw Materials ◽  
Thermal Power ◽  
Ceramic Materials ◽  
Technological Properties ◽  
Physicochemical Processes ◽  
Ash And Slag Waste ◽  
Dry Pressing ◽  
Slag Waste ◽  
Rational Composition

The possibility of using aluminosilicate raw materials and ash and slag waste of thermal power plants in the production of ceramic bricks is considered. The physicochemical processes taking place in the preparation of ceramic materials based on ash and slag waste are studied. In order to accelerate the process of sintering a ceramic material, the possibility of using an additive of sodium silicate lump was investigated. Its influence on the technological properties of ceramics of rational composition was studied and the expediency of introducing this additive into the mixture in the amount of 10% was established. The dependences of fire shrinkage on the amount of ash and slag waste at a firing temperature of 1050 ° C are determined.

scholarly journals USE OF TECHOGENIC RAW MATERIALS IN THE TECHNOLOGY OF CERAMIC BRICKS PRODUCTION

2020 ◽  
pp. 160-169
Author(s):  
N.I. Buravchuk ◽  
O.V. Guryanova
Keyword(s):  
Negative Impact ◽  
Raw Materials ◽  
Raw Material ◽  
Laboratory Research ◽  
Regulatory Documents ◽  
Mine Dumps ◽  
Ash And Slag Waste ◽  
Technogenic Raw Materials ◽  
The Cost ◽  
Slag Waste

The article presents the results of a study of burnt rocks of mine dumps, ash and slag waste and clay raw materials for the purpose of their use in the technology of manufacturing ceramic bricks. Indicators of their quality are given. In terms of properties and composition, this raw material is close to clay. Compositions and technological modes for the manufacture of ceramic bricks using burnt rocks of mine dumps and ash and slag waste have been developed. The results of laboratory research and industrial tests are presented. The possibility of using this technogenic raw material in the technology of manufacturing ceramic bricks has been proven. The use of burnt rocks and ash and slag waste in the compositions for the manufacture of ceramic bricks can improve its quality, including strength and frost resistance. In all respects, prototypes of ceramic bricks meet the requirements of regulatory documents. The involvement of technogenic raw materials in production allows you to save part of natural raw materials, reduce the cost of products while improving their quality, and help reduce the negative impact of waste on the environment in the areas of their location.The involvement of technogenic raw materials in production allows you to save part of natural raw materials, reduce the cost of products while improving their quality, and help reduce the negative impact of waste on the environment in the areas where they are located.

scholarly journals RESULTS OF RESEARCHES OF DEHYDRATION OF SMALL DISPERSED ROCK MASS ON A VIBRATING DEVICE OF NEW DESIGN

2020 ◽  
pp. 5-10
Author(s):  
Vladimir Naduty ◽  
Vitaliy Sukharev ◽  
Sergey Kostyrya
Keyword(s):  
Rock Mass ◽  
Raw Materials ◽  
Froth Flotation ◽  
Mining Industry ◽  
Raw Material ◽  
Auxiliary Process ◽  
Amplitude Fluctuations ◽  
Ash And Slag Waste ◽  
Mechanical Methods ◽  
Slag Waste

Great difficulties arise when processing wet mineral raw materials less than 1 mm, and this problem is given large attention. There is an urgent need to dehydrate the final product of mining to a minimum percentage of moisture. Such raw material includes coal, which in the process of mining and processing forms a large number of small particles with a size of 1.0 ÷ 0.05 mm and, when enriched by froth flotation, is saturated with moisture, which complicates the subsequent use of coal. Also, for the processing of man-made deposits, consisting of ash and slag waste, they must be dewatered for subsequent complex processing, which consists in the use of magnetic separation and fine screening. Mechanical dewatering devices do not always provide the final moisture content required by the market today. Only free and loosely bound moisture is extracted by mechanical methods, and pore and capillary moisture is not removed. Therefore, various sources of heat are used as an auxiliary process for the dehydration of minerals. The article presents the results of studies of dehydration of finely dispersed rock mass on a vibration device of a new design. Intensification of the dewatering process is achieved due to the vertical conical screw and the creation of a vibroboiling layer. Preliminary studies have shown the effectiveness of the use of a transport-drying device, while it was possible to reduce the humidity in the finished product from 15% to 5%. According to the results of the experiments, it was found that during the operation of the transport-drying device, the layer thickness decreases from loading to unloading by 3 times, while the path of movement of the material along the working surface increases 2.5 times, the frequency range of vibration excitation from 1000-1200 rpm, the amplitude fluctuations are 4-5 mm and the temperature of the supplied air is 50-80 Сº. Thus, the proposed dewatering device can be used in the mining industry, since, in addition to transportation, it is also capable of dewatering wet material with sufficient efficiency.

scholarly journals Effect of ash-and-slag waste on the properties of sulphoaluminate portland cement

Vestnik MGSU ◽  
2019 ◽  
pp. 991-1003
Author(s):  
Tang Van Lam ◽  
Nguyen Doan Tung Lam ◽  
Svetlana V. Samchenko
Keyword(s):  
Portland Cement ◽  
Raw Materials ◽  
Setting Time ◽  
Microscopic Analysis ◽  
Silica Sand ◽  
High Dispersion ◽  
Fine Aggregate ◽  
Electron Microscopic ◽  
Ash And Slag Waste ◽  
Slag Waste

Introduction: there is practically no information on the utilization of ash and slag waste (ASW) application in technology of special (noncontracting, expanding, self-stressing) cements, which predetermines the relevance of research in this direction. The study investigates the properties of experimental samples from cement, ash-and-slag and sand mixtures based on sulphoaluminate Portland cement (SAC) with an additive of the ASW. Materials and methods: a fine-particle binder material consisting of the SAC produced by the Podolsk Cement factory with a fine-grained ASW additive was used to obtain a binder mixture. Silica sand functioned as fine aggregate. All the raw materials used were local to the Russian Federation. The setting time, soundness, and strength of the binder mixture were determined according to GOST 30744-2001 standard. The specific surface area of the Portland cement was established through the use of the air permeability method utilizing of PMTs-500 instrument. The microstructure of the hardened binder mixture was studied employing electron microscopic analysis and X-ray phase analysis. Results: the work investigates the effect of 10 %, 15 %, 20 %, and 50 % ASW additive on the water demand, strength, and setting time of the SAC. The article also explores the kinetics of hardening and structure formation of samples from the binder mixture based on the SAC and ASW for hardening under normal conditions. Conclusions: results of the investigation allow recommending the ASW characterized by high dispersion as an additive for production of special cements without significant reduction of their properties. In the presence of the ASW, setting times of the cement mixtures virtually do not change as compared with the pure SAC. With limiting the amount of the ASW in the composition of the Portland cement, the strength characteristics do not practically change through the entire period of hardening.

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