ABSTRACT
In order to analyze and reveal mathematical relations between the drop weight parameters and Bond work indexes, a data base on laboratory testing of various type ore grindability has been collected. However, it must be considered that impact dominates when performing drop weight test (test to study abrasive destruction is carried out separately), meanwhile impact and abrasion destructions occur in a ball mill of Bond. The destruction process depends on form and structure of sample during destruction of large pieces using installation of drop weight (the physical and mechanical properties). Destruction process begins to take place at micro level, and often ore becomes more resistant to breakage. It can be associated with the mineral composition of ore in the first place. Consequently, if the ore has dynamic of uniform destruction at impact and abrasion, it can be claimed that there is correlation dependence, which can be used to express strength parameters of ore through Work Index of Bond. This data was used for statistical analyzes, plotting and for deriving mathematical relations, which showed good convergence of characteristics of impact strength, wear capacity and ball mill work index. The research findings allow passing between the results of different tests without additional studies, which considerably shortens the period of analysis of ore characteristics. Furthermore, the research has shown feasibility of having the detailed and extensive knowledge on strength characteristics of ore as early as the stage of planning of ore pretreatment, which enables improvement of reliability and efficiency of design solutions within the entire system of ore processing.
