A technique to investigate pulverising and abrasive properties of bulk materials

• Autorzy: Ścieszka, S. F. , Grzegorzek, W. , Żołnierz, M.

Warianty tytułu

PL

Metoda badania kruszalności i ścieralności dla materiałów sypkich

• Języki publikacji: EN

Abstrakty

EN

A new method which covers the determination of a bulk material’s basic mechanical properties such as internal friction, shear strength, abrasiveness and grindability is presented and discussed. Several fine bulk materials have been tested and classified. The apparatus consist of a drive shaft and a disc rotating in a closed cylindrical chamber. A normal pressure is applied to the disc through the drive shaft. The wear element consists of a bar fixed to the underside of the disc. The space in the bottom of the cylinder is filled with a given mass of the sample of fine bulk material. The disc is then rotated for a given number of revolutions and the mass loss of the bar is determined as well as the size reduction of the bulk material. This newly proposed method has the advantages of easy testing procedures and the better defined attrition conditions than the standard test method.

PL

Przedmiotem tego artykułu jest nowa metoda, która obejmuje wyznaczanie podstawowych własności materiałów sypkich, takich jak tarcie wewnętrzne, odporność na ścinanie, ścierność i kruszalność. Za pomocą ww. metody przebadano kilka materiałów sypkich. Zasadnicza część stanowiska badawczego składa się z wałka napędzającego i tarczki umieszczonych w pojemniku cylindrycznym. Próbka poddawana procesowi zużywania ma kształt beleczki przymocowanej do tarczki, która jest dociskana do wypełniającego cylinder materiału sypkiego o określonej masie. W trakcie testu próbka – beleczka obraca się określoną liczbę obrotów, a po teście wyznacza się ubytek masy próbki i stopień skruszenia materiału sypkiego. Do zalet testera należy łatwość przeprowadzenia próby i precyzyjnej identyfikacji warunków procesu ciernego.

Słowa kluczowe

PL

ścieralność; kruszalność; tarcie wewnętrzne; materiał sypki

EN

abrasiveness; grindability; internal friction; bulk material

• Czasopismo: Scientific Problems of Machines Operation and Maintenance
• Rocznik: 2011
• Tom: Vol. 46, nr 4
• Strony: 91--100
• Opis fizyczny: Bibliogr. 19 poz., fot., rys., tab.

Twórcy

autor

Ścieszka, S. F.

• Silesian University of Technology, Faculty of Mining and Geology, Institute of Mining Mechanisation, Akademicka 2A Street, 44-100 Gliwice, Poland,

autor

Grzegorzek, W.

• Silesian University of Technology, Faculty of Mining and Geology, Institute of Mining Mechanisation, Akademicka 2A Street, 44-100 Gliwice, Poland,

autor

Żołnierz, M.

• Silesian University of Technology, Faculty of Mining and Geology, Institute of Mining Mechanisation, Akademicka 2A Street, 44-100 Gliwice, Poland,

Bibliografia

• [1] Ścieszka S.F., Dutkiewicz R.K.: Testing abrasive wear in mineral comminution. International Journal of Mineral Processing, 32, 1991, pp. 81–109.
• [2] Berkowitz N.: An introduction to coal technology. Academic Press, London. 1979, pp. 69–75.
• [3] Scieszka S.F.: Tribological problems of mineral comminution. Tribotest, 2–3, 1996, pp. 235–255.
• [4] Ścieszka S.F.: Method of abrasive wear testing in comminution processes. Tribotest, 2–3, 1996, pp. 257–266.
• [5] Ścieszka S.F., Jadi A.S.M.: The effect of abradant particle comminution of the intensity of three-body abrasion. Tribotest, 5–2, 1998, pp. 145–155.
• [6] Ścieszka S.F., A technique to investigate pulverizing properties of coal, Powder Tech., 43, 1984, pp. 89–102.
• [7] BS 1016: Part 19: Determination of the Index of Abrasion of Coal, British Standards Institution, London, 1980.
• [8] ASTM D409-71, Standard Test Method for Grindability of Coal by the Hardgrove Machine Method, ASTM, Philadelphia, 1971.
• [9] Parish B.M., Investigations of wear in coal pulverisers, J. Inst. Fuel, 2, 1967, pp. 76–81.
• [10] Jang J.W., Iwasaki I., and Moore J.J., The effect of galvanic interaction between martensite and ferrite in grinding media wear, Corrosion Science, 45, 1989, pp. 402–407.
• [11] Misra S., Finnie I., Correlations between two-body and three-body abrasion and erosion of metals, Wear, 68, 1981, pp. 33–39.
• [12] ASTM G65-80, Standard Practice for Conducting Dry Sand/Rubber Wheel Abrasion Test, ASTM, Philadelphia, 1980.
• [13] Perez R., Moore J.J., The influence of grinding ball composition and wet grinding conditions on metal wear, Conference Proceedings on Wear of Materials, ASME, 1983, pp. 67–78.
• [14] Ścieszka S.F., Methods for the determination of sliding and impact erosion wear in equipment, SA Mechanical Engineer, 40, 1990, pp. 248–259.
• [15] Bayer R.G., Selection and use of wear tests for metals, ASTM, 615, 1976, pp. 30–44.
• [16] Ścieszka S.F., Laboratory method for combined testing of abrasiveness, grindability and wear in mineral processing systems, STLE Preprint, 91-AM-5F-1.
• [17] Spero C., Hargreaves D.J., Kirkcaldie R.K., Flitt H.J., Review of test methods for abrasive wear in ore grinding, Wear, 146, 1991, pp. 389–408.
• [18] Ścieszka S.F., Modelling durability of coal grinding systems, Wear, 114, pp. 29–39.
• [19] Ścieszka S.F.: Simultaneous abrasion and edge fracture resistance estimation of hard materials by the tribotesting method. ZEM, 2 (166) vol. 46, 2011, pp. 55–104.