Abstract: In order to solve a series of environmental and safety problems caused by waste rock storage ,and clarify the process of producing sand and gravel aggregates from iron ore waste rock,a certain iron ore waste rock in Anben area of Liaoning Province was regarded as the test sample.Based on the analysis of its basic properties,a study on the parameters of comminution characteristics based on Bond ball mill work index test and JK drop weight test was carried out.The Bond ball milling work index test results show that the Bond ball milling work index Wib of the iron ore waste is 12.05 kWh/t.The results of JK drop weight test show that the impact crushing model of the iron ore waste is t10=71.25(1-e-0.52ECS),where impact crushing parameter A×b is 37.05.The abrasion comminution parameter ta is 0.17.The relative density is 3.06.The test results show that the impact crushing resistance of the iron ore waste rock belongs to the hard category,and the abrasion crushing resistance belongs to the extremely hard category.Combined with the above test results,the production equipment and utilization process of the iron ore waste rock were finally determined.

Key words: iron ore waste rock, comminution characteristics, Bond ball mill work index, JK drop weight test, utilization of waste rock