Rationale For Economic Expediency Of Complex Utilization Of Ash And 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).

Download Full-text

Complex Technology of Ash and Slag Waste from Power Plants

Ecology and Industry of Russia ◽

10.18412/1816-0395-2021-7-20-25 ◽

2021 ◽

Vol 25 (7) ◽

pp. 20-25

Author(s):

L.M. Delitsyn ◽

Yu.V. Ryabov ◽

R.V. Kulumbegov ◽

M.G. Sulman ◽

Yu.Yu. Kosivtsov ◽

...

Keyword(s):

Magnetic Separation ◽

Power Plants ◽

Optimal Size ◽

High Quality ◽

Flotation Reagents ◽

Ash And Slag Waste ◽

Complex Technology ◽

Flotation Method ◽

Carbon Iron ◽

Slag Waste

The development of a comprehensive technology for the processing of ash waste (ASW), which is based on the extraction of carbon from the CSO by flotation method and iron-containing minerals by means of magnetic separation, is presented. The proposed approach is based on the extraction of carbon from ash and slag by flotation and iron-containing minerals by magnetic separation. In this work, the optimal size of the ash fraction supplied for flotation was established. It is shown that when the technological process is carried out according to the stadium scheme when flotation reagents are fed in fractions, it allows their consumption to be reduced and the recovery of carbon concentrate from underburning to be significantly increased. The developed technology was tested on a pilot plant. High-quality carbon, iron-containing and aluminosilicate products were obtained. Auxiliary enrichment processes such as classification, thickening and filtration were tested.

Download Full-text

INDUSTRIAL WESTE ACCOUNTING ON EXAMPLE ASH DUMPS

EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA ◽

10.36871/ek.up.p.r.2021.04.04.033 ◽

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.

Download Full-text

Composite Сarbonaceous Сoal-Water Suspensions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1045.212 ◽

2021 ◽

Vol 1045 ◽

pp. 212-225

Author(s):

Olena Svietkina ◽

Kostiantyn Bas ◽

Sergiy Boruk ◽

Roman Klishchenko ◽

Oleksandr Yehurnov ◽

...

Keyword(s):

Power Plants ◽

Statistical Data ◽

Main Type ◽

Thermal Power ◽

Electric Energy ◽

Oil Refining ◽

Thermal Power Plants ◽

Water Suspensions ◽

Ash And Slag Waste ◽

Slag Waste

In Ukraine, up to 75% of all electricity is supplied by thermal power plants, the main type of fuel for which is coal, which leads to the release of ash and slag waste at power plants in huge quantities. Every 10 years (according to statistical data) the amount of ash and slag produced at thermal power plants doubles. The use and creation of new modified consumers of coal-water fuel (CWF) and coal-water suspensions (CWS) occurs periodically. The ease of handling suspensions is captivating: in the energy sector, they can serve as the basis for the effective disposal of numerous accumulated wastes from coal preparation and oil refining, a significant reduction in the consumption of minerals for generating heat and electric energy, and minimizing the effect of heat power engineering on public health and the state of nature.

Download Full-text

Study of the content of rare and rare earth elements in ash and slag waste of the Kemerovo state district power plant

E3S Web of Conferences ◽

10.1051/e3sconf/202131502004 ◽

2021 ◽

Vol 315 ◽

pp. 02004

Author(s):

Tatiana Cherkasova ◽

Anastasia Tikhomirova ◽

Elizaveta Cherkasova ◽

Andrey Golovachev

Keyword(s):

Rare Earth ◽

Power Plant ◽

Rare Earth Elements ◽

Inductively Coupled Plasma ◽

Optical Emission ◽

Emission Spectrometry ◽

High Tech ◽

Inductively Coupled ◽

Ash And Slag Waste ◽

Slag Waste

In the context of restrictions due to the sanctions imposed, a key factor in the country's development is the development of new Russian high-tech materials and their production technologies. The study of ash and slag waste from the Kemerovo State District Power Plant was carried out in this work using the methods of inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). It has been established that matrix elements make up the predominant share of ash and slag waste. Rare and rare earth elements in terms of their content are classified as trace elements, however, some of them either have commercial values, or are close to it.

Download Full-text