«Kombinat KMAruda» JSC (Gubkin, Russia):

Savelev V. M., Chief Dresser, e-mail: svm@kmaruda.ru

Lazebnaya M. V., Head of an Inspection Department

A cone crusher НР-200, produced by Metso company, was tested in 2008 in the fine crushing department at «Kombinat KMAruda» JSC. The crusher НР-200 replaced the cone fine crusher KMD-1750 (КМД-1750) subsequently. Final average weighted size of fraction was decreased from 13-14 mm to 6.5-7.3 mm. One technological section became the basis for the tests of a screen Derrick Stack Sizer 2SG48-60W-5STK, which replaced the hydrocyclones 400CVX. Circulating load in the crushing stage was decreased from 250-300% to 40-70%, which made it possible to remove one second-stage mill from the operation process. During the testings, the productivity of the section was increased by 5-8% without decreasing of qualitative indices. There has been recently held the next reconstruction of crushing and concentrating plant with replacement of crusher and hydrocyclones. For the period of six years, ore productivity of mills has been increased by 42 %; consumption of balls has been decreased by 22.2 %; specific consumption of electric power has been decreased by 23%; consumption of water has been decreased to 15 m³/t of concentrate. This article presents a new technological scheme of one section of crushing and concentrating plant.