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US 2022/0034035 A1Published application
Refiner plate having inter-bar wear protrusions
AssigneeAndritz Inc.
InventorsLuc Gingras, Tobias Michel
Life of this patent
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Abstract
The problem of increased energy usage in refiners over the working life of a refining assembly is mitigated by the use of a refiner plate segment having a refiner side and a back side distally disposed from the refiner side, refiner bars engaged to a substrate of the refiner side, wherein the refiner bars have a refiner bar height, and wherein adjacent refiner bars and the substrate define grooves between the adjacent bars, and protrusions disposed in the grooves, wherein the protrusions have a protrusion height, wherein the protrusion height is 30% or less of the refiner bar height.
Claims24
A refiner plate segment comprising:
- an inner arc;
- an outer arc distally disposed from the inner arc;
- a first end distally disposed from a second end, the first end and second end extending between the inner arc and the outer arc;
- a substrate disposed between the inner arc, first end, second end, and the outer arc;
- a refiner side and a backside distally disposed from the refiner side;
- refiner bars engaged to the substrate on the refiner side, wherein the refiner bars have a refiner bar height, and wherein adjacent refiner bars and the substrate define a groove between the adjacent refiner bars;
- and
- a protrusion disposed in the groove, the protrusions having a protrusion height, wherein the protrusion height is no more than 30% of the refiner bar height.
5 more elements
A refiner plate segment comprising:
- an inner arc;
- an outer arc distally disposed from the inner arc;
- a first end distally disposed from a second end, the first end and the second end extending between the inner arc and the outer arc;
- a substrate disposed between the inner arc, first end, second end, and the outer arc;
- a refiner side of the substrate and a back side of the substrate distally disposed from the refiner side;
- refiner bars engaged to the substrate on the refiner side, wherein the refiner bars have a refiner bar height, and wherein adjacent refiner bars and the substrate define a groove between the adjacent refiner bars;
- and
- protrusions disposed in the groove, the protrusions having a protrusion top, a protrusion base, and a protrusion height between the protrusion top and the protrusion base, and a side connecting the protrusion top and the protrusion base,
- wherein a protrusion of the protrusions has a longitudinal cross-sectional area measured from a plane disposed along a longest length of the protrusion as measured from a portion of the protrusion disposed closest to the inner arc to a portion of the protrusion disposed closest to the outer arc,
- wherein an adjacent refiner bar of the refiner bars has a lateral cross-sectional area measured from a plane intersecting a refining section transversely to a refiner bar length, and
- wherein protrusion longitudinal cross-sectional area is less than 20% of a lateral cross-sectional area of an adjacent refiner bar.
8 more elements
A refiner plate segment comprising:
- an inner arc;
- an outer arc distally disposed from the inner arc;
- a first end distally disposed from a second end, the first end and the second end extending between the inner arc and the outer arc;
- a substrate disposed between the inner arc, first end, second end, and the outer arc;
- a refiner side of the substrate and a backside of the substrate distally disposed from the refiner side;
- refiner bars engaged to the substrate on the refiner side, wherein the refiner bars have a refiner bar height, and wherein adjacent refiner bars and the substrate define a groove between adjacent refiner bars;
- and
- a protrusion disposed in the groove between two adjacent refiner bars,
- wherein the protrusion is a flow restrictor having a first restrictor end distally disposed from a second restrictor end,
- wherein the first restrictor end engages a leading face of a first refiner bar of the two adjacent refiner bars, and
- wherein the flow restrictor is disposed above the substrate of the groove.
8 more elements
A method comprising:
- arranging protrusions in positive grooves of a casting mold to define inlaid protrusions, the protrusions having a protrusion height, wherein the protrusion height is no more than 25% of a negative refiner bar height in the casting mold;
- pouring molten metal into the casting mold;
- fusing the inlaid protrusions with the molten metal;
- permitting the molten metal to cool to define a cast refiner plate segment;
- and removing the cast refiner plate segment from the casting mold.
2 more elements
Dependencies are inferred from the claim text.