scholarly journals Natural radioactivity of coal in the context of radioecological safety and rational use

2021 ◽  
pp. 97-106
Author(s):  
Iurii Pak ◽  
◽  
Dmitrii Pak ◽  
Zhmagul Nuguzhinov ◽  
Anar Tebaeva ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Coal Combustion ◽  
Natural Radionuclides ◽  
Specific Radioactivity ◽  
Combustion Products ◽  
Radionuclide Concentration ◽  
Rational Use ◽  
Ash Composition ◽  
Ash And Slag Waste ◽  
Slag Waste

Introduction. Environmental contamination with natural radioactive elements is an urgent ecological problem of the coal industry. Radiation hazard associated with natural radionuclides in coals and enclosing rock is a poorly studied problem requiring special attention. Radionuclides and their combustion products in coals, i. e. ash and slag waste and gas aerosol emissions, released into the biosphere, become the sources of pollution. Radiation monitoring is required in the course of geological prospecting, deposits development and rational use. The research aims to systematize research and analytical material on specific radioactivity of coal and their combustion products, and update the problem of radioecological safety monitoring. Methodology includes studying data on specific radioactivity of coal at various deposits, studying natural radioactivity of coal, enclosing rock and ash and slag waste, describing ash and slag waste and radon as a source of radioactive contamination, assessing potential radon hazard of mine workings, and analyzing ash composition characteristics for toxicologic estimation of ash dumps and their effect on the environment. Results. Generalized data on radionuclide concentration in coal burned at the CHP facilities, slag and fly ash are presented. Radionuclide specific concentration is much higher in ash and slag waste of coal heat power industry than in initial coal. It is caused by the radionuclide concentration in the products of coal combustion. Potential hazard of radon released from rock is revealed, and ash composition is characterised for toxicologic estimation of ash dumps. Conclusions. Uncontrolled coal combustion exacerbates the problem of radioecological safety due to radioactive aerosol emission and the formation of ash and slag waste with increased concentration of natural radionuclides. System monitoring of radioactivity level in the course of geological prospecting, mining, processing and combustion will allow reducing radionuclides entering the fuel cycle and environment.

scholarly journals Assessing the Problem of Coal Combustion Products Accumulation in Ash and Slag Dumps of Russian Thermal Power Plants

2020 ◽  
Author(s):  
Nikolai Sergeevich Lapin
Keyword(s):  
Coal Combustion ◽  
Power Plants ◽  
Thermal Power ◽  
Combustion Products ◽  
Thermal Power Plants ◽  
Coal Combustion Products ◽  
Annual Increase ◽  
Ash And Slag Waste ◽  
Slag Waste

In this article, the authors assess the problem of annual increase in ash and slag waste produced by Russian thermal power plants.

scholarly journals Methods for processing ash and slag waste from coal combustion

2018 ◽  
Vol 124 (3) ◽  
pp. 60-67
Author(s):  
B.T. Yermagambet ◽  
◽  
N.U. Nurgaliyev ◽  
L.D. Abylgazina ◽  
N.А. Maslov ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Ash And Slag Waste ◽  
Slag Waste

scholarly journals Research of composition and properties of ash and slag waste from the Thermal Power Plant of Trans-Baikal region for decrease of anthropogenic impact on environment

2020 ◽  
Vol 28 (2) ◽  
pp. 131-141
Author(s):  
Pavel P. Pankov ◽  
Nataliya A. Konovalova ◽  
Dmitry V. Bespolitov
Keyword(s):  
Fly Ash ◽  
National Economy ◽  
Anthropogenic Impact ◽  
Natural Radionuclides ◽  
Thermal Power ◽  
Raw Material ◽  
Emission Spectrometry ◽  
Scanning Calorimetry ◽  
Ash And Slag Waste ◽  
Slag Waste

The anthropogenic impact on environment of ash and slag waste of CHP 1 and CHP 2 (Chita) and CHP Priargunsky Industrial Mining and Chemical Union (Krasnokamensk) is considered. These wastes cause irreparable damage to the environment, occupy a significant area, lead to a deterioration of the environmental situation in the surrounding areas. Liquidation of such objects of accumulated harm to the environment is the most important state task in the areas of national economy and environmental protection. Rapid recycling of ash and slag waste is possible in road construction (the main material-intensive sector of the national economy) due to large-capacity direct use. This will effectively reduce the anthropogenic impact on the environment and significantly reduce the use of mineral raw. The principal possibility of using of fly ash as a secondary mineral raw material in compositions of road soil concrete is substantiated. The methods of atomic emission spectrometry with inductively coupled plasma, differential scanning calorimetry and thermogravimetry were used to study the composition and properties of fly ash of CHP, which is a first-class mineral raw based on the specific effective activity of natural radionuclides (226Ra, 232Th, 40K), which allows their use in the construction industry without restrictions. It has been established that fly ash is non-porous, its hydraulic properties are classified as latent-active and can be added to road cement soils modified with additives of different nature.

CONCENTRATES OF RARE AND RARE EARTH ELEMENTS FROM KUZBASS ASH AND SLAG WASTE

2021 ◽  
pp. 35-39
Author(s):  
Elizaveta V. Cherkasova ◽  
Anastasia V. Tikhomirova ◽  
Tatiana G. Cherkasova ◽  
Andrey A. Golovachev
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Ash And Slag Waste ◽  
Slag Waste

Innovational Construction Materials of LLP “EcostroyNII-PV” Production

2021 ◽  
Vol 410 ◽  
pp. 806-811
Author(s):  
Kapar Sh. Aryngazin ◽  
Alexey V. Bogomolov ◽  
Askar K. Tleulessov
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Construction Materials ◽  
Electric Power Industry ◽  
Steelmaking Slag ◽  
Alumina Production ◽  
Building Products ◽  
Operational Characteristics ◽  
Ash And Slag Waste ◽  
Slag Waste

The article discusses the experience of recycling industrial waste from the electric power industry and metallurgy. Based on the experience of Ecostroy NII-PV LLP. The proposed technology for manufacturing building products from ash and slag waste provides innovative compositions of raw mixtures. What provides an increase in operational characteristics and labor productivity in construction. The applied technology, in comparison with the existing analogues, provides for the use of local waste (ash and slag waste from the combustion of Ekibastuz coal, bauxite sludge from the Pavlodar aluminum plant, steel-making slags), differing in chemical and granulometric composition. as well as binding properties from other analogs and prototypes. In the manufacture of building products introduced mixture, including, wt %: slag Portland cement - 14.32-17.00; sand - 18.74-25.52, crushed stone - 46.50-49.71, sludge from alumina production obtained during the recycling of bauxite from Kazakhstan - 5-7; self-disintegrating steelmaking slag - 5-7; ash and slag waste from thermal power plants from burning Ekibastuz coals - 5-7. According to the test results, the average tensile strength of building products (paving slabs, curbs, hollow bricks) is 3.2 - 3.8 MPa (strength class V2.5).

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