Studying the Process of Rupture of Flat Ferroalloy Ingots in the Jaw Crusher Workspace with Allowance for Impact Loading

The process of high-strength material rupture in the workspace of a jaw crusher is analyzed. It is noted that an optimal variant of deforming a material to fracture is tension which provides a minimum load on the main machine assemblies and parts. A force for material rupture in the crushing chamber of a jaw crusher is determined from wave equations taking into account the impact loading and the specificity of the material to be crushed; both lateral and longitudinal impacts are also considered. Solutions to the wave-type equation are obtained using discontinuous functions. A relative deformation of a material lump is connected with the deformation speed by the certain functional relationship. The lump deformation at the time of impact is fully determined by a speed of the moving jaw of the crusher and does not depend on its mass. There are impact-and-jaw crushers based on the mentioned principles. The simplified formulas are obtained for determination of maximal impact loads, at which the material rupture occurs. For creating predominantly tensile loads in the crushing chamber of a crusher, new constructions of crushing plates are proposed, for which the patents of Kazakhstan and Ukraine are received.

References

[1] Turkin V.Ya., Kazakov S.V., Arsent’ev V.A. Case record of vibrating jaw crushers for ferroalloys recycling. Stal’ [Steel], 2005, no. 11, pp. 63-64 (in Russ.).

[2] Kuzbakov Zh.I. The destruction process of flat ferrochrome ingots in the workspace of jaw crushers. Mater. Respubl. Nauch. Konf. "Problemy kompleksnogo osvoeniya prirodnykh resursov Zapadnogo Kazakhstana i Yuzhnogo Urala" [Proc. Republican Sci. Conf. "Problem complex exploration of natural resources of West Kazakhstan and South Urals"], Aktobe, 2003, pp. 46-48 (in Russ.).

[3] Kuzbakov Zh.I. Operating conditions and the nature of the loading for jaw crushers Mater. Mezhdunar. Nauchno-Prakt. Konf. "Kompleksnayapererabotka mineral’nogo syr’ya" [Proc. Int. Sci. Pract. Conf. "Complex processing of mineral raw material"], Karaganda, PK "Ekozhan", 25-26 September, 2008, pp. 220-228 (in Russ).

[4] Kuzbakov Zh.I. Select design of jaw crusher for crushing of high-strength material. Izv. Vyssh. Uchebn. Zaved., Chern. Metal. [Proc. Univ., Ferr. Metallurgy], 2009, no. 2, pp. 45-48 (in Russ.).

[5] Klushantsev B.V., Kosarev F.I., Muzeymnek Yu.F. Drobilki. Konstruktsiya, raschet, osobennosti ekspluatatsii [Design, calculation, special aspects of operation]. Moscow, Mashinostroenie Publ., 1990. 320 p.

[6] Brakh I. Theoretical problems fragmentation of the rock and construction development of crushers. Simp. po Stroitel’nym i Dorozhnym Mashinam. Tez. dokl. [Proc. Symp. on Road-Building Machinery], Moscow, 1965, pp. 193-198 (in Russ.).

[7] Ponomarev S.D., Biderman V.L., Likharev K.K.. Osnovy sovremennykh metodov rascheta na prochnost’ v mashinostroenii: raschety pri dinamicheskoy nagruzke. Ustoychivost’. Polzuchest’ [Foundation of contemporary methods for stressing calculation in mechanical engineering: dynamical load calculations. Rigidity. Creeping]. Moscow, Mashgiz Publ., 1952. 862 p.

[8] Komarov M.S. Dinamika mekhanizmov i mashin [Dynamics of machines and mechanisms]. Moscow, Mashinostroenie Publ., 1969. 296 p.

[9] Kuzbakov Zh.I., Franchuk V.P., Fedoskin V.A. Shchekovaya drobilka [Jaw crusher]. Patent Republic of Kazakhstan, no. 2010/071.2, 2010.

[10] Franchuk V.P., Kuzbakov Zh.I., Fedoskin V.A. Shchokova drobarka [Jaw crusher]. Patent Ukraine, no. 11201002619, 2011.