Energy Requirements and Consumption for Blasting, Crushing and Grinding of Ores

FOR IMMEDIATE RELEASE
(Free-Press-Release.com) February 21, 2012 -- Blasting, crushing and grinding of ores — a process which consumes about 50 percent of the total energy used in mining — is exploring methods to reduce this consumption by more than 10 percent. One of these projects focuses on the most inefficient energy use in the chain of activity, such as grinding processes.

This paper compares energy requirements for blasting, crushing and grinding. By tracking electrical consumption for various powder factors, a general trend has appeared. This study involves over 100 million tons of ore and powder factors ranging from .5 lbs/LT to .8 lbs/LT. Actual energy usage is compared to predicted energy based on the Bond equation. Blasting may enjoy as much as a 3:1 cost advantage over grinding. This is a startling notion considering that energy is cheaper when purchased as electricity by ratio of 5:1 when compared to

Source:
http://www.stonecrushermobile.org/news/energy-requirements-and-consumption-for-blasting-crushing-and-grinding-of-ores.html