Utilization direction of industrial raw products built-up in power station ash dumps

Abstract

Nowadays hundreds million tons of ash and slag waste (ASW) is produced in Russia yearly. Large territories are needed in order to store such a big waste volume. Besides, it is necessary to conduct special engineering and ecological work at the design and usage stages of this structure. The goal of the research is to outline acceptable ASW utilization methods accumulated in coal burning power station ash dumps and to determine the order of activities to solve the problem. The research methods: experimental where Kansk-Achinsk and Kuznetsk coals are the object of the research. Besides, review of relevant to the problem literature and normative documentation was done to determine activities order, possible ways and limitations of the problem solving. We elucidated that ASW transportation to depleted coal quarries to restore them is essential to arrange in order to solve the problem of ASW utilization. As to new produced ASW, they should be divided into groups according to application field (mostly in construction). The groups correspond to boiler unit load operation. After coal combustion ash is stored in special places (reservoirs, silos). Therefore modern boiler unit might be seen as a production complex of steam and ash and slag material of an adequate quality.

Water deficits in the water economics complex of Crimea

“…There are three types of ultraviolet disinfection facilities in the local market that can be used for irrigation purposes: horizontal type, vertical type, and container type. Table 1 includes an example calculation of the economic efficiency of the operation of such treatment plants with different levels of daily discharge of sewage; these plants are produced directly in Crimea and can be used for both individual housing estates and large enterprises (Lihach et al 2017). The efficiency of such plants is achieved because of the additional volume of water, obtained after treatment (otherwise, this volume must be payed for) and the cost savings due to the absence of water disposal.…”

Improving the Properties of Porous Geopolymers Based on TPP Ash and Slag Waste by Adjusting Their Chemical Composition

“…In the Russian Federation, the volume of ASW processing reaches 10–12% [ 9 , 10 ], and they are mainly used for the needs of the cement industry, where they are used as an additive for Portland cement [ 11 , 12 , 13 , 14 ]. At the same time, it is known that the volume of ash and slag being processed in Germany reaches 100% [ 15 ], in India—more than 60% [ 16 ], in the countries of the European Union—about 90% [ 17 ], in the USA—25% [ 18 ].…”