Composite milling component
A composite milling component comprising a composite region of ceramic material and metal is disclosed. The milling component may comprise a lifting member such as a digger shoe of a vertical tower mill, a flight liner of a vertical tower mill, a shell liner of a horizontal axis mill, and/or an end liner of a horizontal axis mill. The composite region may be formed into a portion of the milling component that experiences greater wear than other portions to increase a wear-resistance of the milling component. The composite region may be formed integrally into the milling component during a casting processes of the milling component.
1. A cast component comprising:
a body comprising a substantially helical shape about an axis with a first end terminating at a first plane and a second end terminating at a second plane;
the first plane forming an angle with the second plane, with a vertex at the axis, of between about 90° and about 180°;
the body including a composite region, disposed at an outer portion of the body, having an aggregate hardness greater than a hardness of portions of the body not including the composite region,
wherein the cast component comprises a digger shoe or a flight liner of a tower mill.
2. The cast component of claim 1 , wherein the body comprises a curved inner sidewall and a curved outer sidewall, a distance between the curved inner sidewall and the curved outer sidewall being greater at the first end than at the second end.
3. The cast component of claim 1 , further comprising a top surface disposed between the first end and the second end, the top surface having a stepped profile.
4. The cast component of claim 1 , further comprising a top surface disposed between the first end and the second end, a bottom surface disposed between the first end and the second end, and a mounting hole passing from the top surface to the bottom surface.
5. The cast component of claim 1 , further comprising a top surface disposed between the first end and the second end, and one or more loops or hooks protruding from the top surface.
6. The cast component of claim 1 , further comprising a bottom surface disposed between the first end and the second end, and a support bar protruding from the bottom surface proximal to an outer sidewall of the body.
7. The cast component of claim 1 , further comprising a channel disposed at the first end, formed by a terminating edge of a bottom surface, a terminating edge of an inner sidewall, and a terminating edge of an outer sidewall.
8. The cast component of claim 1 , wherein the composite region is integrally formed into the body.
9. The cast component of claim 1 , wherein the cast component is mountable onto a vertical screw shaft of a tower mill.
10. A tower mill comprising:
a screw shaft; and
a cast component mounted to the screw shaft, the cast component comprising:
a body comprising a substantially helical shape about an axis with a first end terminating at a first plane and a second end terminating at a second plane;
the first plane forming an angle with the second plane, with a vertex at the axis, of between about 90° and about 180°;
the body including a composite region, disposed at an outer portion of the body, having an aggregate hardness greater than a hardness of portions of the body not including the composite region.
11. The tower mill of claim 10 , wherein the body of the cast component comprises a curved inner sidewall and a curved outer sidewall, a distance between the curved inner sidewall and the curved outer sidewall being greater at the first end than at the second end.
12. The tower mill of claim 10 , the cast component further comprising a top surface disposed between the first end and the second end, the top surface having a stepped profile.
13. The tower mill of claim 10 , the cast component further comprising a top surface disposed between the first end and the second end, a bottom surface disposed between the first end and the second end, and a mounting hole passing from the top surface to the bottom surface.
14. The tower mill of claim 10 , the cast component further comprising a top surface disposed between the first end and the second end, and one or more loops or hooks protruding from the top surface.
15. The tower mill of claim 10 , the cast component further comprising a bottom surface disposed between the first end and the second end, and a support bar protruding from the bottom surface proximal to an outer sidewall of the body.
16. The tower mill of claim 10 , the cast component further comprising a channel disposed at the first end, formed by a terminating edge of a bottom surface, a terminating edge of an inner sidewall, and a terminating edge of an outer sidewall.
17. The tower mill of claim 10 , wherein the composite region is integrally formed into the body.
18. The tower mill of claim 10 , wherein the cast component comprises a digger shoe or a flight liner.
19. A cast component comprising:
a body comprising a substantially helical shape about an axis with a first end terminating at a first plane and a second end terminating at a second plane;
the first plane forming an angle with the second plane, with a vertex at the axis, of between about 90° and about 180°;
the body including a composite region, disposed at an outer portion of the body, having an aggregate hardness greater than a hardness of portions of the body not including the composite region; and
the body including a top surface disposed between the first end and the second end, the top surface having at least one of:
a stepped profile; or
one or more loops or hooks protruding from the top surface.
20. The cast component of claim 19 , further comprising a bottom surface disposed between the first end and the second end, and at least one of:
a mounting hole passing from the top surface to the bottom surface; or
a support bar protruding from the bottom surface proximal to an outer sidewall of the body.