XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3949
for Attrition Grinding is typically between 140 and 150
degrees.
Note: This variable is a function of mill speed, liner
design, media size, ore characteristics, and mill density. The
IA measurement combines all these variables into a single
number that can be used to determine the real-time opti-
mal mill speed, resulting in the highest possible throughput
for the current process operating conditions.
Fill Toe Angle (FTA): This corresponds to the degree
or point inside the mill where the toe of the load is located.
Impact on Toe (IOT): Another measurement indicat-
ing the difference in degrees between the Impact Angle (IA)
and Fill Toe Angle (FTA). OIT can be positive (impacts on
shell) or negative (impact on load). Ideally, IOT should be
zero to maximize impact grinding. For maximizing attri-
tion grinding or under-throwing media, a negative IOT
is preferred. A positive IOT indicates an over-throwing
Figure 3. Advanced Analytics Measurements (AAM) with Respect to Traditional Power Curves
for Attrition Grinding is typically between 140 and 150
degrees.
Note: This variable is a function of mill speed, liner
design, media size, ore characteristics, and mill density. The
IA measurement combines all these variables into a single
number that can be used to determine the real-time opti-
mal mill speed, resulting in the highest possible throughput
for the current process operating conditions.
Fill Toe Angle (FTA): This corresponds to the degree
or point inside the mill where the toe of the load is located.
Impact on Toe (IOT): Another measurement indicat-
ing the difference in degrees between the Impact Angle (IA)
and Fill Toe Angle (FTA). OIT can be positive (impacts on
shell) or negative (impact on load). Ideally, IOT should be
zero to maximize impact grinding. For maximizing attri-
tion grinding or under-throwing media, a negative IOT
is preferred. A positive IOT indicates an over-throwing
Figure 3. Advanced Analytics Measurements (AAM) with Respect to Traditional Power Curves