3-BODY IMPACT-ABRASION LABORATORY TESTING FOR GRINDING BALL MATERIALS

The specifications for a reliable laboratory testing for grinding ball materials still remain a problem in view of the large number of param eters to be reproduced and of the combined effect of impact, abrasion and corrosion wear. A laboratory-scale three-body impact-abrasion test ing machine has been built, which uses real ore as abrasive in dry or wet conditions and which is capable of producing impact loads comparab le to those encountered in actual on grinders. Results obtained with t his apparatus on five grinding ball materials showed an excellent corr elation with results coming from an in situ marked-ball test. (C) 1998 Elsevier Science S.A. All rights reserved.