Naslov
Impact of Hardness on Specific Crushing Energy and Product Size of Jaw Crusher

Autori
Bedeković, Gordan ; Kujundžić, Trpimir ; Korman, Tomislav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 13th Conference on Environment and Mineral Processing, Part II / Peter Fečko, Čablik Vladimir - Ostrava : Publishing services department, VŠB - Technical University of Ostrava, 2009, 259¸-266

ISBN
978-80-248-1995-2

Skup
13th Conference on Environemt and Mineral Processing

Mjesto i datum
Ostrava, Češka Republika, 04.06.2009. - 06.06.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Schmidt rebound hardness; Crushing Energy; Jaw Crusher; Grain Size Distribution

Sažetak
The crushing of the mineral raw material is the most essential mechanical operation within mineral processing. It is also an inefficient, energy intensive process that consumes billions of kilowatt-hours (kWh) per year. In fact only 1% of the total energy input into size reduction processes is used in individual particles breaking and changing of solid material dispersion state. Since the technology is well known, improvements in comminution are dependent upon optimizing the application and operation of that technology. The quality of building crushed stone is evaluated on the basis of the physical and mechanical characteristics, the grain size distribution and the grain shape. Schmidt rebound hardness of rocks is the characteristic which is due to its speed and simplicity of testing often applied in practice. The paper presents results of the testing of hardness impact on the crushing energy and product size of the laboratory jaw crusher. Results show that the Schmidt rebound hardness of rock mass does not have significant influence on the jaw crusher power consumption. The high correlation (R2=0, 876) between grain size distribution parameter t10 and Schmidt rebound hardness has been established.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA