Laserfiche WebLink
<br />December 6, 1991 <br />To: G.C. Dodson <br />From: J.C. Lenz <br />Subject: November Monthly Operating Report <br />1. Mill Operations <br />1.1 Crushing <br />Approximately 143,985 wet tons of ore were crushed <br />in November. Operating availability of the primary <br />crusher was 74.9$. No major operating problems were <br />experienced this month. The most common reasons for <br />downtime during the month were misalignment of CV- <br />O1, slab rock blockages of the feeder and the <br />crusher, and frozen fines packing the feeder. <br />New swing jaw liners were installed in November. The <br />original set crushed approximately 840,000 tons. <br />1.2 Grindin4 <br />148,451 dry tons of ore were ground during November. <br />Operating availability of the plant increased to 94.8$ <br />this month. Average plant throughput for the month <br />increased to 217 tons per hour. Total power consumption <br />increased to 30.3 kwh/ton. <br />Unscheduled mill downtime resulted from several plugged <br />SAG mill feed chutes, and replacement of a broken SAG <br />mill grate during the month. Scheduled mill maintenance <br />requiring interrupted operations consisted of the <br />following: <br />1. Rebuilding the ball mill feed line and box. <br />