Laserfiche WebLink
l • III III III III IIII III • <br />August 6, 1991 <br />To: G.C. Dodson <br />From: J.C. Lenz <br />Subject: July Monthly Operating Report <br />1. Mill Operations <br />1.1 Crushing <br />Approximately 101,805 wet tons of ore were crushed <br />in July. Operating availability of the primary <br />crusher was 83.3$. Operations were routine during <br />the month. <br />For the last three months, a comparison of the wet <br />tons totalized by CV-02 versus the throughput of the <br />primary crusher as estimated by loader bucket count <br />revealed a difference of only 1.78$. This <br />correlation indicates that the proper tonnage factor <br />has been used when calculating throughput based on <br />the number of loads fed to the crusher. <br />1.2 Grinding <br />100,429 dry tons of ore were ground during July. <br />Operating availability of the plant decreased to 80.66$ <br />this month. Average plant throughput for the month <br />decreased to 167 tons per hour. Major downtime was caused <br />by replacement of the SAG mill feed chute, failure of <br />the SAG mill Tube oil pump, and slurry handling problems <br />associated with bypassing the ball mill. <br />The thickener underflow piping modification was completed <br />on July 12th. Thickener dilution piping was underway at <br />month's end. Completion is expected in August. <br />