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Results of a study on the quality of conical picks for public procurement purposes

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Treść / Zawartość
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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The article presents the results of a study on the quality of conical picks for the purposes of tender procedures in accordance with the public procurement law in Poland. The pick studies presented here are one of the few that in practice allow the selection of an offer based on objectively determined numerical indicators defining the quality of the product and not only on the basis of price. Thanks to this, the contracting party can decide the relevance of price and quality in their evaluation of a pick. The geometrical and material parameters required in a tender, if not met, are the basis for rejecting a given offer of picks. The numerical parameter influencing the final evaluation of the offer is the picks' rate of wear. Conical picks are tools for mining minerals, rocks, asphalt or concrete. They are used in many industries, especially in mining, construction and road engineering. In difficult working conditions, the durability of knives is limited to as little as several hours. Several dozen picks work on a cutting unit at the same time, and taking into account the price of a knife which oscillates around several dozen euros, significant operating costs are incurred. Therefore, the selection of tools with an optimum price-quality ratio is crucial. The article presents the results of studies on geometric parameters, material parameters and the rate of wear of 48 sets of picks conducted for a tender consisting of 14 tasks. The tender was conducted for 6 underground mines of a coal company. Five producers submitted their offers for selected tasks in the tender.
Rocznik
Strony
687--693
Opis fizyczny
Bibliogr. 12 poz., rys., tab.
Twórcy
autor
  • AGH University of Science and Technology, Poland
Bibliografia
  • 1. Bołoz Ł, Krauze K. (2018). Ability to mill rocks in open-pit mining. In: 18th International Multidisciplinary Scientific Geoconference, Exploration and Mining, SGEM2018, Albena, Bulgaria, Voulme 2.
  • 2. Chang S., Lee, Chulho, Kang. (2017). Tae-HoEffect of hardfacing on wear reduction of pick cutters under mixed rock conditions. Geomechanics and engineering, 13(1), pp. 141-159.
  • 3. Dewangan, Saurabh, Chattopadhyaya, Somnath, (2015). Critical Analysis of Wear Mechanisms in Cemented Carbide. Jorunal of materials engineering and performance, 24(7), pp. 2628-2636.
  • 4. Dewangan, Saurabh; Chattopadhyaya, Somnath; Hloch, Sergej. (2015). Wear Assessment of Conical Pick used in Coal Cutting Operation. Rock mechanics and rock engineering, 48(5), pp. 2129-2139.
  • 5. Gajewski J., Jedlinski L., Jonak J. (2013). Classification of wear level of mining tools with the use of fuzzy neural Network. Tunnelling and underground space technology, 35, pp. 30- 36.
  • 6. Kotwica K. (2011). The influence of water assistance on the character and degree of wear of cutting tools applied in roadheaders. Archives of Mining Sciences, 5(3), pp. 353-374.
  • 7. Krauze K., Bołoz Ł.(2018). Disc unit dedicated to mine abrasive rocks and in particular copper ores. In: 18th International Multidisciplinary Scientific Geoconference, Exploration and Mining, SGEM2018, Albena, Bulgaria, Voulme 2
  • 8. Krauze K., Bołoz Ł., Wydro T. (2015). Parametric factors for the tangential-rotary picks quality assessment, Archives of Mining Sciences, 60(1), pp. 265-281.
  • 9. Krauze K., Bołoz Ł., Wydro T., Mucha K. (2017). Durability testing of tangential-rotary picks made of different materials. Mining - Informatics, Automation and Electrical Engineering, 1, pp. 26-34.
  • 10. Krauze K., Kotwica K. (2007). Selection and underground tests of the rotary tangential cutting picks used in cutting heads of the longwall and roadway miners. Archives of mining science, 52(2), pp. 195-217.
  • 11. Nahak, Sakuntala; Dewangan, Saurabh; Chattopadhyaya, Somnath. (2015). Discussion on Wear Phenomena in Cemented Carbide. In: Global Challenges, Policy Framework & Sustainable Development for Mining of Mineral and Fossil Energy Resources. Dhanbad: GCPF, 11, pp. 284-293.
  • 12. Songyong L., Huifu; J., Xiaohui L. (2017). Experimental research on wear of conical pick interacting with coal-rock. Engineering failure analysis, 74, pp. 172-187.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-95b03ff6-6ad7-4b75-b157-83af9b01e5ca
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