Temat: Pył - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental study of coal dust deposition in mine workings with the use of empirical models
Autorzy:: Prostański, D.
Powiązania:: https://bibliotekanauki.pl/articles/970689.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: pył węglowy
pył kopalniany
zagrożenie pyłowe
coal dust
mine dust
dust hazard
Opis:: Empirical models, developed on the basis of the results of tests on dust deposition and changes in concentration of dust in the protective zone, are the proposed tools to reduce risk of coal dust explosion. The paper presents possible applications of such models to assess and monitor volume of dust in a protective zone. Underground tests were conducted in the tailgate and headgate of longwall 121 of Brzeszcze Coal Mine. Basing on the analysis, the empirical models describing relationship between changes in dust concentration, and dust deposition in a protective zone of roadways: headgate and tailgate of longwall 121 in Brzeszcze Coal Mine, were developed. The developed models show a possibility of predicting explosive dust deposition in a protective zone. After additional research is run, it is planned to generalise the developed empirical model, which will enable monitoring of protective zones.
Źródło:: Journal of Sustainable Mining; 2015, 14, 2; 108-114
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of the effectiveness of coal and mine dust wetting
Autorzy:: Cybulski, K.
Malich, B.
Wieczorek, A.
Powiązania:: https://bibliotekanauki.pl/articles/92175.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: pył węglowy
pył kopalniany
chemikalia
zagrożenie pyłowe
coal dust
mine dust
chemicals
dust hazard
Opis:: One of the methods of fighting the risk of coal dust's explosion is its neutralization through washing and misting of mining sediment which lays on the mining excavation and through misting on the organs of hewer machines or on the dumpings and inundations of mining product's output. Coal dust, especially its smallest fractions which create the biggest risk of explosion, is generally the substance which cannot be easily moistened by water. Water solutions of different wetting agents are applied in hard bituminous coal mines in order to enhance the effectiveness of coal dust's moistening during the washing and misting. Therefore it is indicated to conduct research and evaluate the effectiveness of its effects in order to select optimally the type of wetting agents and their concentration in water solutions depending on coal dust's properties (type of coal the particular dust comes from) and on percentage participation of non-inflammable parts which are constant in mine dust. This paper presents a method to evaluate the effectiveness of coal or mine dust's moistening conducted with the use of water solutions of wetting agents in order to deprive the dust of its volatility, is based on the method of measurement of time of complete moistening of that dust's one-gram samples with the use of “pure” water or water solutions of the particular wetting agent.
Źródło:: Journal of Sustainable Mining; 2015, 14, 2; 83-92
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Assessment of hazard due to release of gaseous ammonia from the fly ash-water mixture applied in longwall mine gobs
Autorzy:: Krause, E
Drobek, L.
Borecki, T.
Powiązania:: https://bibliotekanauki.pl/articles/91942.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: ammonia
fly ash
gas hazard
amoniak
pył lotny
zagrożenie gazowe
Opis:: Purpose: The introduction of flue gas denitrification technologies by selective catalytic reduction (SCR) or selective non-catalytic reduction (SNCR) in coal fired plants resulted in an increase of ammonia content in fly ash. The utilization of fly ash in fire and ventilation prevention of hard coal mines causes the release of ammonia from a fly ash-water mixture. In the applied technology of the ash and water mixture, ammonia in gaseous form is discharged and mixes with the air flowing through the mine airways. In this article, reference is made to the risk assessment of gaseous ammonia in the longwall area during the application of the fly ash-water mixture to the gobs in the U-tube ventilation system. Methods: The test methods include: ammonia release from ash and water mixtures at various temperatures and in respect to different proportions of water to ash with use of a multigas analyzer with an FTIR detector. Results: The results of the laboratory tests helped to determine the size of the ammonia stream released from the fly ash-water mixture in respect to different ratios of water to ash. Practical implications: Laboratory studies allow for ventilation and gaseous analysis to assess the level of ammonia risk, in the mine airways, from exhaust air discharged from the longwall area. Originality/ value Based on the literature review, this type of research has not been carried out so far.
Źródło:: Journal of Sustainable Mining; 2014, 13, 2; 1-5
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Modeling kinetics of CO2 (carbon dioxide) mineral sequestration in heterogeneous aqueous suspensions systems of cement dust
Autorzy:: Świnder, H.
Michalak, M.
Uliasz-Bocheńczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/92115.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: CO2 sequestration
cement dust
invariant function
sekwestracja CO2
pył cementowy
funkcja niezmienna
Opis:: The necessity to reduce CO2 emission in the environment has encouraged people to search for solutions for its safe capture and storage. Known methods for carbon dioxide mineral sequestration are based primarily on the use of its binding reaction with metal oxides, mainly earth metals. Increasingly important, due to the availability and price, are processes based on the suspension of various wastes such as fly ash, cement dust or furnace slag. Due to the complexity of the mineral sequestration of CO2 in water-waste suspensions, an important issue is to determine the reaction mechanisms. This applies mainly to the initial period of the transformation phase of mineral wastes, and consequently with the occurrence of a number of transition states of ionic equilibria. The mechanisms and reaction rates in the various stages of the process of CO2 mineral sequestration in heterogeneous systems containing selected wastes are defined herein. This paper presents a method of modeling kinetics of this type of process, developed on the basis of the results of the absorption of CO2 thanks to the aqueous suspension of fly ash and cement dust. This allowed for the transfer of obtained experimental results into the mathematical formula, using the invariant function method, used to describe the processes.
Źródło:: Journal of Sustainable Mining; 2013, 12, 4; 1-5
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The level of securing dust deposits against the possibility of coal dust explosion in the drilled dog headings
Autorzy:: Malich, Bogdan
Cybulski, Krzysztof
Wysocka, Małgorzata
Skubacz, Krystian
Michałek, Aneta
Urban, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/1839064.pdf
Data publikacji:: 2021
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal dust
coal dust explosions
dust prevention
safety zones
pył węglowy
wybuch pyłu węglowego
zapobieganie zapyleniu
strefy bezpieczeństwa
Opis:: The article presents the analysis how the real coal dust explosion hazard occurs at the distance of the initial 200m of the protective zone maintained along the entire length of driven inclined drift II - face 567 in Polish colliery KWK „BRZESZCZE”, which was used during realization of the project titled Modelling of the mechanism of explosive coal dust deposition in the vicinity of mined faces in terms of identification, assessment and levelling the possibility of its explosion financed by the National Centre for Research and Development in Poland. The mine dust level was between 0.014 kg/m3 and 0.193 kg/m3, and the coal dust level between 0.003 kg/m3 and 0.051 kg/m3, at the content of incombustible solids between 62.9% and 96.9%. In the analysed fragment of the mine working there was settled dry and volatile mine dust of transient water content between 0.1% and 3.8%. In a few measurement points (sidewalls, floor, and the dust explosion barrier) it was observed that the content of incombustible solids was lower than required by the regulations (unsecured mine dust), which resulted from the insufficient application of stone dust and increased intensity of dust settlement, especially in the area near the longwall face. Analyses of the fraction distribution of the settled mine dust showed the presence of fine dust, while coarser fractions were found in the places of lowered content of non-combustible solids. The conclusions indicate that it is necessary to modify the currently applied dust-explosion prevention measures, which ought to adjust the amount of stone dust applied in given sections of the safety zone and the stone dust ought to be applied with more diligence.
Źródło:: Journal of Sustainable Mining; 2021, 20, 1; 39-48
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Continuous dust monitoring in headings in underground coal mines
Autorzy:: Lebecki, K.
Małachowski, M.
Sołtysiak, T.
Powiązania:: https://bibliotekanauki.pl/articles/92184.pdf
Data publikacji:: 2016
Wydawca:: Główny Instytut Górnictwa
Tematy:: optical dust sensor
gravimetric dust sampler
laser diffraction
respirable dust
optyczny czujnik pyłu
pyłomierz grawimetryczny
dyfrakcja laserowa
pył respirabilny
Opis:: The article presents hazardous conditions of airborne dust based on the results of measurements of dust concentration taken at work-places at a underground rock-coal face drilled by a heading machine with combined ventilation (suction and forced ventilation with dust collector). The measurements were taken using three methods in order to examine and assess the actual conditions within the excavation subject to the study. The measurement results and conclusions show major difficulties in achieving MAC levels. Research conclusions indicate the low efficiency of collective and personal measures applied to protect against dust harmful to health as well as the need to improve them.
Źródło:: Journal of Sustainable Mining; 2016, 15, 4; 125-132
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Use of air-and-water spraying systems for improving dust control in mines
Stosowanie zraszania powietrzno-wodnego dla ograniczenia zapylenia w kopalniach
Autorzy:: Prostański, D.
Powiązania:: https://bibliotekanauki.pl/articles/1342757.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: safety
hazard
air dustiness
dust
air dust reduction
air-and-water spraying
bezpieczeństwo
zagrożenia
zapylenie
pył
redukcja zapylenia
zraszanie powietrzno-wodne
Opis:: This article describes air-and-water spraying systems, designed at the KOMAG Institute of Mining Technology, used in longwall shearers, in roadheaders, at transfer points of conveyors and in roadways. The simple and lightweight design of roadway spraying systems ensures that the solutions can be used anywhere that dust occurs in the air. The spraying systems form an integral part of longwall shearers, and their function is to reduce airborne dust levels and to prevent methane explosion. The use of air-and-water spraying systems can reduce dust concentration by up to 80% and they contribute to a significant reduction of dust concentration in the air. Some results of tests concerning the effectiveness of air-and-water spraying devices are presented, verification tests of the author’s solutions for spraying nozzles are also discussed.
W artykule opisano powietrzno-wodne systemy zraszania stosowane w kombajnach ścianowych, chodnikowych, na przesypach przenośników oraz w chodnikach, opracowane przez ITG KOMAG. Prosta budowa i lekka konstrukcja chodnikowych urządzeń zraszających pozwalają na stosowanie tych rozwiązań niemal w każdym miejscu, gdzie w powietrzu jest obecny pył. W kombajnach ścianowych urządzenia zraszające stanowią integralną część kombajnu; oprócz ograniczania zapylenia, służą także do zapobiegania zapłonowi metanu. Powietrzno-wodne urządzenia zraszające wykazują nawet 80% skuteczność w redukcji zapylenia i znacząco wpływają na obniżenie zawartości pyłu w powietrzu kopalnianym. W artykule przedstawiono niektóre wyniki badań skuteczności powietrzno-wodnych urządzeń zraszających, omówiono również konstrukcję i badania autorskich rozwiązań dysz zraszających.
Źródło:: Journal of Sustainable Mining; 2013, 12, 2; 29-34
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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