INVESTIGATION OF THE RELATIONSHIP BETWEEN BOND GRINDABILITY TEST AND STATIC AND DYNAMIC STRENGTH OF ROCKS

Yıl 2022, Cilt: 30 Sayı: 1, 79 - 89, 15.04.2022

Yakup Umucu , Yaşar Hakan Gürsoy

https://doi.org/10.31796/ogummf.984220

Öz

The Bond method is widely used in the design of grinding circuits in an ore preparation plant, sizing of mills, determining power requirements and determining and measuring performance, and for materials considered to be comminution. Its use as a standard is very common in the industry as it provides satisfactory results in all industrial applications. The dynamic method was developed as an alternative to static methods in determining the mechanical properties of materials. There are studies investigating the static and dynamic properties of materials and revealing the relationship between these parameters. There are two different ways to characterize materials to predict performance in industrial scale comminution equipment. The first is to perform standardized tests and assume that these tests best describe the process in comminution equipment. The second is to mimic the process in pilots or large plants to measure variations in performance in different rock types. In this study, the behavior of rocks under dynamic and static conditions was revealed and the relationship between Bond Grindability Test was investigated.

Anahtar Kelimeler

Grinding, Bond Work Index, Hopkinson dynamic tests, Static compressive strength

INVESTIGATION OF THE RELATIONSHIP BETWEEN BOND GRINDABILITY TEST AND STATIC AND DYNAMIC STRENGTH OF ROCKS

Öz

The Bond method is widely used in the design of grinding circuits in an ore preparation plant, sizing of mills, determining power requirements and determining and measuring performance, and for materials considered to be comminution. Its use as a standard is very common in the industry as it provides satisfactory results in all industrial applications. The dynamic method was developed as an alternative to static methods in determining the mechanical properties of materials. There are studies investigating the static and dynamic properties of materials and revealing the relationship between these parameters. Previously, a lot of work were done between mechanical tests and grinding. However, in these studies, the relationships were only revealed with equations. Research which is mechanical property closest to the grinding mechanism was not made. In this study, the relationship between grinding and static and dynamic compressive strength was investigated. Dynamic compressive strength was also determined by the Hopkinson dynamic test. For the first time, the relationship between grinding and compressive strength based on the Hopkinson dynamic test was demonstrated. A relationship with a value of R2:0.82 and 0.738 was obtained between grindability and compressive strength depending on the Hopkinson dynamic test.

Anahtar Kelimeler

Grinding, Bond Work Index, Hopkinson dynamic tests, Static compressive strength

Kaynakça

• Austin, L.G. & Brame, K. (1983). A comparison of the Bond method for sizing wet tumbling ball mills with a size-mass balance simulation model. Powder Technol. 34, 261–274.
• Bearman, R.A., Briggs, C.A. & Kojovic, T. (1997). The Application of Rock Mechanics Parameters to the Prediction of Comminution Behaviour. Minerals Engineering, 10, 3, 255-264.
• Berry,T.F. & Bruce., R.W. (1966). A simple method of determining the grindability of ores. Can. Min. J., vol, 80, pp. 63-65
• Bond, F.C. (1961). Crushing and Grinding Calculations. British Chemical Engineering, 6, 378-385, 543-548.
• Bond, F.C. & Maxson, W.L. (1943). Standard grindability tests and calculations. Trans. Soc. Min. Eng., AIME 153, 362–372.
• Dai, F., Xia, K. W. & Tang, L Z. (2010). Rate dependence of the flexural tensile strength of Laurentian granite. International Journal of Rock Mechanics and Mining Sciences, 47 (3), pp. 469-475.
• Deniz, V., Özdağ, H., (2003). A new approach to Bond grindability and work index: dynamic elastic parameters. Minerals Engineering, vol. 16, 211–217.
• Horst, W. E. & Bassarear. J. H. (1976). Use of simplified ore grindability technique to evaluate plant performance. Trans. SME- AIME. Vol. 260. 348-351.
• Karra, V. K., (1981). Simulation of Bond grindability tests. CIM Bull., 74, pp. 195-199
• Kapur, P. C. (1970). Ana1ysis of the Bond Grindability Test. Trans. IMM, Vol. 79, pp. C-103-108.
• King, M. S. (1983). Static and dynamic elastic properties of rocks from the Canadia shield. Int. J. Rock Mech. Min. Sci. Geomech., Abstr. 20, 237–245.
• Kolsky, H. (1949). An investigation of the mechanical properties of materials at very high rates of strain. Proc. R. Phys. Soc. B 62, 676–700.
• Kumar, A., Mies, L.T.S. & Pengjun, Z. (2004). Design of an impact striker for a split Hopkinson pressure bar. J., Inst. Eng. 44(1), 119–130.
• Magdalinovic, N., (1989). A procedure for rapid determination of the Bond work index. Int. J. Min. Process. 27, 125–132.
• Mcmullan, D. (2006). Scanning electron microscopy 1928–1965. Scanning, 17 (3), 175.
• Nematollahi, H., (1994). New size laboratory ball mill for Bond work index determination. Min. Eng. (April), 352–353.
• Smith, R.W. & Lee, K.H., (1968). A comparison of data from Bond type simulated closed-circuit and batch type grindability tests. Trans. Soc. Min. Eng., AIME 241, 91–99.
• Sisman, H., Altintas, M. & Ozturk, I., (1990). Relationships between seismic wave velocities and rock parameters in rock mechanics (in Turkish). II. Rock mechanic symposium, Ankara, pp. 221–237.
• Tüfekçi, K., (2008). Gerinim hızının kortikal kemiğin mekanik özellikleri üzerindeki etkisinin incelenmesi. Doktora tezi, Süleyman Demirel Üniversitesi, Fen bilimleri Enstitüsü, Isparta.
• Xia,K., Nasseri, M.H.B., Mohanty,F.Lu,B., Chen,R. & Luo, S.N., (2008). Effects of microstructures on dynamic compression of barre granite. International Journal of Rock Mechanics and Mining Sciences, 45 (6), pp. 879-887
• Van Heerden, W.L., (1987). General relations between static and dynamic moduli of rocks. Int. J. Rock Mech. Min. Sci. Geomech., Abstr. 24, 381–385.
• Yavuz, H., Tüfekçi, K., Kayacan, R., & Cevizci, H., (2012). Predicting the Dynamic Compressive Strength of Carbonate Rocks from Quasi-Static Properties. Experimental Mechanics, 53:367–376 DOI 10.1007/s11340-012-9648-7
• Yap, R.F., Sepulude, J.L. & Jauregui, R., (1982). Determination of the Bond work index using an ordinary laboratory batch ball mill; designing and installation of comminution circuits. Soc. Min. Eng., AIME, New York, 176–203.