Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Hredzák Slavomír"'
Autor:
Mihajlović Slavica, Savić Ljubinko, Radosavljević Dragana, Savić Ljiljana, Blagojev Marina, Hredzák Slavomír
Publikováno v:
Podzemni Radovi, Vol 2020, Iss 37, Pp 41-49 (2020)
This paper presents theoretical considerations and working parameters analyzes of hydrotransport during unstable flow. The variable flow of hydraulic mixture in installations causes unsteady operation and pipes spraying, pump damage, obturation in va
Externí odkaz:
https://doaj.org/article/7c9e3610f4a14d62accec8b044d9cf02
Publikováno v:
Acta Montanistica Slovaca, Vol 11, Iss special issue 2, Pp 384-387 (2006)
This contribution deals with the treatment of Slovakian eolic quartz sands by bioleaching and magnetic separation with the aim to remove iron. The X-ray study of sand patterns confirms that quartz occurs as a dominant mineral. Accompanying minerals a
Externí odkaz:
https://doaj.org/article/45a1eff9947d4d7082b6bda80d6c384c
Publikováno v:
Acta Montanistica Slovaca, Vol 7, Iss 1, Pp 23-27 (2002)
The contribution presents the results of the cleaning of waters contaminated by heavy metal ions by means of magnetic sorbents that in special cases are also called magnetic carriers. The wastes from metallurgical industry and thermal power generatio
Externí odkaz:
https://doaj.org/article/f39e54133fc44ddd9a2ffbf2ce74a098
Publikováno v:
Acta Montanistica Slovaca, Vol 5, Iss 3, Pp 251-254 (2000)
The contribution describes results of steam coal washing in water-only (WO) cyclone at various diameter of underflow jets. The overflow jet with the diameter of 68 mm was used. In the case of underflow the following jet were applied: 18 mm, 15.6 mm a
Externí odkaz:
https://doaj.org/article/ba0b35827c2f4052bd9b11220ca8c8b5
Publikováno v:
Acta Montanistica Slovaca, Vol 5, Iss 1, Pp 36-42 (2000)
The contribution gives an attention to a new generation of equipment operating under action of high centrifugal forces. Their development was caused by a low efficiency of conventional mineral processing facilities as well as by the losses of valuabl
Externí odkaz:
https://doaj.org/article/a4619e6ef11c47deae8f891f6625bd4d
Publikováno v:
Acta Montanistica Slovaca, Vol 3, Iss 3, Pp 434-438 (1998)
The paper describes mathematical model of the water only cyclone function on the basis Of experimental data. The experiments have been realized in a pilot plant cyclone. The model was verified in the case of steam coal preparation from the Cíge¾, H
Externí odkaz:
https://doaj.org/article/9db51870df7c44a0ba1a56121588cb20
Publikováno v:
Acta Montanistica Slovaca, Vol 3, Iss 3, Pp 425-428 (1998)
The contribution presents the results of tests on a gravity separation of steam coal from the Cíge¾ Colliery. The preparation tests were carried out in a multigravity separator Mozley. The preparation conditions and the quality of obtained products
Externí odkaz:
https://doaj.org/article/a20f2c0dcf744b39aa117660ca6daee1
Publikováno v:
Acta Montanistica Slovaca, Vol 3, Iss 3, Pp 244-250 (1998)
The contribution gives attention to the general trends in the coal economy in the 90s. The most significant world´s coal producers are presented with regard to the total coal production as well as to the hard and brown coal production. The article a
Externí odkaz:
https://doaj.org/article/c871265db31f49bd8ed6680ab0a43710
Publikováno v:
Acta Montanistica Slovaca, Vol 3, Iss 3, Pp 405-408 (1998)
The contribution deals with the possibilities of ferrofluid application as a separation medium and a selective wetting agent with the aim of desulphurization and ash content decreasing of brown coal from Slovak deposits. The influence of magnetic fie
Externí odkaz:
https://doaj.org/article/1787c4b6e0564466886e7398cb14dbdc
Autor:
Hredzák Slavomír, Turèániová ¼udmila
Publikováno v:
Acta Montanistica Slovaca, Vol 2, Iss 3, Pp 223-227 (1997)
The contribution gives the review of Slovak brown coal research in the last 10 years. The state and development trends of the coal research in Slovakia from the point of view of the clean coal technologies application are described. Some selected res
Externí odkaz:
https://doaj.org/article/58b17f69566740c5bb9f400540d74eaf