The Wear Rate of SAG Mill Feeding Ball
Since sulfur-copper concentrator with 7,000-ton ore milled was put into production, there have been 4 SAG mill grinding balls suppliers. May to July 2017 are for Shandong Huamin & Shandong Gangyan, August to December are for Iraeta and Chengde Rongmao are for 2018. The ball consumption of each manufacturer is as follows:
Table 1 May-July 2017 SAG mill ball consumption
(Forged grinding ball: Shandong Huamin& Shandong Gangyan)
|
2017 |
Monthly throughput (ton) |
Feeding ball quantity (ton) |
The Wear Rate (kg/t) |
|||
|
The month |
Grand total |
The month |
Grand total |
The month |
Grand Total |
|
|
May |
118,486.19 |
111,486.19 |
89 |
89 |
0.75 |
0.75 |
|
Jun |
77,221.71 |
195707.90 |
34 |
123 |
0.44 |
0.43 |
|
July |
192,919.36 |
388,627.26 |
108 |
231 |
0.56 |
0.59 |
Table 2 Aug-Dec 2017 SAG mill ball consumption
(Forged grinding ball: Shandong Iraeta)
|
2017 |
Monthly throughput (ton) |
Feeding ball quantity (ton) |
The Wear Rate (kg/t) |
|||
|
The month |
Grand total |
The month |
Grand total |
The month |
Grand Total |
|
|
Aug. |
217,470.32 |
21747.32 |
100 |
100 |
0.46 |
0.46 |
|
Sep. |
174,049.93 |
391,520.25 |
80 |
180 |
0.46 |
0.46 |
|
Oct. |
194,368.88 |
585,889.13 |
117 |
297 |
0.60 |
0.51 |
|
Nov. |
251,041.73 |
836,930.86 |
118 |
415 |
0.47 |
0.50 |
|
Dec. |
227,099.14 |
1,064,030.00 |
101 |
516 |
0.44 |
0.48 |
Table 3 Jan-Aug 2018 SAG mill ball consumption
(CADI grinding ball: Chengde Rongmao)
|
2018 |
Monthly throughput (ton) |
Feeding ball quantity (ton) |
The Wear Rate (kg/t) |
|||
|
The month |
Grand total |
The month |
Grand total |
The month |
Grand Total |
|
|
Jan. |
207,023.24 |
207.023.24 |
102 |
102 |
0.49 |
0.49 |
|
Feb. |
235,688.64 |
442,711.88 |
83 |
185 |
0.35 |
0.42 |
|
Mar. |
178,427.13 |
622,139.01 |
77 |
262 |
0.43 |
0.42 |
|
Apr. |
195,145.32 |
816,284.33 |
77 |
339 |
0.39 |
0.42 |
|
May |
211,605.60 |
1,027,889.93 |
67 |
406 |
0.32 |
0.39 |
|
Jun. |
223,738.22 |
1,251,628.15 |
81 |
487 |
0.36 |
0.39 |
|
Jul. |
195,547.60 |
1,447,375.75 |
77 |
564 |
0.39 |
0.39 |
|
Aug. |
208,674.72 |
1,650.050.47 |
88 |
652 |
0.42 |
0.29 |
It can be seen from Table 1 that the mill throughout of the first two months of the concentrator is not stable, with a a large fluctuation in SAG mill ball charge. Since July, the production gradually get normal, with a cumulative wear rate at 0.59kg/t; Comparing table 2 with table 3, a conclusion can be drawn that the ball consumption of Shandong Iraeta fluctuates between 0.44kg/t and 0.6kg/t, accumulative total is 0.48kg/ton; the wear rate of Chengde Rongmao varies from 0.32kg/t to 0.49Kg/t, accumulative total is 0.39kg/ton. Judging by the using condition, Chengde Rongmao's grinding ball has less out-of roundness characteristics.
By comparing ball consumption of the 4 manufacturers, Chengde Rongmao's wear rate and cost effectiveness performance is the best.