Grinding of raw material and cement at cementos lima's Atocongo plant in lima-Peru

摘要

Cementos Lima S.A. at its Atocongo Plant in Lima -Peru has initiated a long term expansion program managed by its Technical Advisor ARPL Tecnologi'a Industrial, involving capacity increase and modernization of the entire cement plant. A briefdescription of the strategical background and reasoning leading to the decision will be given.A unique feature of the plant is that raw material as well as cement grinding is centered around high pressure grinding rolls (HPGR). After completion the plant will operate a total of six high pressure grinding rolls with an installed power of 2,800 kWeach. Three of them will grind raw material in finish grinding process, three will grind cement in either finish grinding or in "combi mode" with existing ball mills.Since the plant is largely dependent on the high pressure grinding rolls, special attention has been given to operational reliability and safety. Their availability must be within the range achieved by the ball mills. The paper will report on theexperience from the first year of operation.