Investigation of Mill Balls Metal Deterioration in Mills KBM 370/850 (Sh-50А) when Fuel not Envisaged in the Mill Design is Used at Thermal Power Plants

2015;
: pp. 19 – 24
https://doi.org/10.23939/jeecs2015.01.019
Received: March 30, 2015
Revised: June 02, 2015
Accepted: July 20, 2015
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University

Method for determining mill balls metal deterioration rate in a ball mill KBM 370/850 (Sh-50А) of dust-system of coal-dust boilers TPP-210А and TPP-312 300МW of thermal power plants is described in the paper. The research is aimed at the development of the determination method of the mill balls deterioration rate in a ball mill, which would allow predicting the regulated refill of the ball mill by the mill balls. The research tasks were to analyze existing literature, to develop the calculation method of the mill balls deterioration rate in the mill, to carry out analytic calculations and obtain analytic relationships of mill balls deterioration rate, and based on this to develop generalized regularities for any dust-systems of thermal power plants. The rank of coal being grinded in the mill, the mill operation mode, design features of dust-system and boiler etc. influence the mill balls deterioration rate.

  1. Technical maintenance of power plants and electric grids. Regulations. GKD  34.20.507 – 2003. – Kyiv : OEP “GRIFREE” – 2003. – 611 p. (in Ukrainian)
  2. Calculations and design of coal dust preparation systems of boiler plants (regulations). – Lviv : CKTI – VTI, 1971. – 231 p. (in Russian)
  3. Coal dust preparation at thermal power plants / H. Т. Levit. – Moscow : Energoatomizdat, 1991. – 275 p. (in Russian)
  4. Heat engineering tests of boiler plants / V. I. Trembovlia. – Moscow : Energoatomizdat, 1991. – 245 p. (in Russian)
  5. Preparation and grinding of fuel at power plants / А. N. Lebedev. – Moscow : Energiya, 1969. – 520 p. (in Russian)
  6. Holyshev L. V. Ball mill output determination when grinding the coal of reduced quality / L. V. Holyshev, J. S. Mysak, Т. Yu. Kravets // Energetika i elektificatsyya – 2000. – No. 8. – Р. 14–15. (in Ukrainian)
  7. Holyshev L. V. Determination of correction factors for specific loss of mill balls when grinding ASH rank coal / L. V. Holyshev, J. S. Mysak, Yu. М. Mishchenko, Т. Yu. Kravets // Energetika i elektificatsyya. – 2005. – No. 10. – Р. 6–9. (in Ukrainian)
  8. Holyshev L. V. Definition of indicators of KBM armor wearing when milling ASh grade coal / L. V. Holyshev, J. S. Mysak, P. Yu. Omelyanovskyy ; ed. P. Omelyanovsk and Y. Mysak // Thermal energy – new challenges. – Lviv : NPF “Ukrainian technologies” 2010. – P. 122–128. (in Ukrainian)
S. Mysak, T. Voronchak. Investigation of Mill Balls Metal Deterioration in Mills KBM 370/850 (Sh-50А) when Fuel not Envisaged in the Mill Design is Used at Thermal Power Plants. Energy Eng. Control Syst., 2015, Vol. 1, No. 1, pp. 19 – 24. https://doi.org/10.23939/jeecs2015.01.019