US2024287631A1PendingUtilityA1
Agglomerated ore assessing method and agglomerated ore
Est. expiryJun 18, 2041(~14.9 yrs left)· nominal 20-yr term from priority
Inventors:Yuya MoritaTakahide HiguchiTetsuya YamamotoToshiyuki HirosawaYuji IwamiKenya HoritaShohei FujiwaraKenta TakeharaDaisuke Igawa
C22B 1/16C21B 13/02C22B 1/00C21B 5/008C21B 13/0073
53
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Claims
Abstract
An agglomerated ore is reduced while being subjected to a predetermined load at 1000° C. to 1200° C., both inclusive, to produce a reduced aggregate; a tumble treatment is performed on the reduced aggregate using a tumble tester; cluster strength CS of the reduced aggregate calculated by Formula (1) below is measured; and a clustering property of the agglomerated ore is assessed using the cluster strength CS: CS=(W′/W)×100 . . . (1), where CS is cluster strength (mass %); W is the mass (g) of a reduced aggregate that is equal to or larger than a maximum particle diameter of the agglomerated ore; and W′ is the mass (g) of a reduced aggregate after a tumble treatment in the tumble tester that is equal to or larger than the maximum particle diameter of the agglomerated ore.
Claims
exact text as granted — not AI-modified1 . An agglomerated ore assessing method wherein: agglomerated ore is reduced while being subjected to a predetermined load at 1000° C. to 1200° C., both inclusive, to produce a reduced aggregate; a tumble treatment is performed on the reduced aggregate using a tumble tester; cluster strength CS of the reduced aggregate calculated by Formula (1) below is measured; and a clustering property of the agglomerated ore is assessed using the cluster strength CS:
CS
=
(
W
′
/
W
)
×
100
,
(
1
)
where CS is cluster strength (mass %); W is the mass (g) of a reduced aggregate that is equal to or larger than a maximum particle diameter of the agglomerated ore; and W′ is the mass (g) of a reduced aggregate after a tumble treatment in the tumble tester that is equal to or larger than the maximum particle diameter of the agglomerated ore.
2 . The agglomerated ore assessing method according to claim 1 , wherein the reduced aggregate is produced using a reducing gas that does not contain a compound having a C atom.
3 . The agglomerated ore assessing method according to claim 1 , wherein the reduced aggregate is produced using a reducing gas containing 70 vol % or more H 2 .
4 . Agglomerated ore wherein cluster strength CS 30 is 0 mass % as measured in the agglomerated ore assessing method according to claim 1 using the reduced aggregate having been reduced at 1000° C. and a reduced aggregate after the tumble treatment obtained by rotating the reduced aggregate 30 times at 30 rpm.
5 . The agglomerated ore according to claim 4 , wherein a particle diameter is 8 mm or larger.
6 . The agglomerated ore according to claim 4 , wherein total Fe is 64.5 mass % or less.
7 . The agglomerated ore according to claim 4 , wherein Formula (2) below is met:
Al
2
O
3
+
SiO
2
≥
3.5
mass
%
,
(
2
)
where Al 2 O 3 is a component concentration (mass %) of Al 2 O 3 in the agglomerated ore, and SiO 2 is a component concentration (mass %) of SiO 2 in the agglomerated ore.
8 . The agglomerated ore assessing method according to claim 2 , wherein the reduced aggregate is produced using a reducing gas containing 70 vol % or more H 2 .
9 . Agglomerated ore wherein cluster strength CS 30 is 0 mass % as measured in the agglomerated ore assessing method according to claim 2 using the reduced aggregate having been reduced at 1000° C. and a reduced aggregate after the tumble treatment obtained by rotating the reduced aggregate 30 times at 30 rpm.
10 . Agglomerated ore wherein cluster strength CS 30 is 0 mass % as measured in the agglomerated ore assessing method according to claim 3 using the reduced aggregate having been reduced at 1000° C. and a reduced aggregate after the tumble treatment obtained by rotating the reduced aggregate 30 times at 30 rpm.
11 . The agglomerated ore according to claim 9 , wherein a particle diameter is 8 mm or larger.
12 . The agglomerated ore according to claim 10 , wherein a particle diameter is 8 mm or larger.
13 . The agglomerated ore according to claim 9 , wherein total Fe is 64.5 mass % or less.
14 . The agglomerated ore according to claim 10 , wherein total Fe is 64.5 mass % or less.
15 . The agglomerated ore according to claim 5 , wherein total Fe is 64.5 mass % or less.
16 . The agglomerated ore according to claim 12 , wherein total Fe is 64.5 mass % or less.
17 . The agglomerated ore according to claim 9 , wherein Formula (2) below is met:
Al
2
O
3
+
SiO
2
≥
3.5
mass
%
,
(
2
)
where Al 2 O 3 is a component concentration (mass %) of Al 2 O 3 in the agglomerated ore, and SiO 2 is a component concentration (mass %) of SiO 2 in the agglomerated ore.
18 . The agglomerated ore according to claim 5 , wherein Formula (2) below is met:
Al
2
O
3
+
SiO
2
≥
3.5
mass
%
,
(
2
)
where Al 2 O 3 is a component concentration (mass %) of Al 2 O 3 in the agglomerated ore, and SiO 2 is a component concentration (mass %) of SiO 2 in the agglomerated ore.
19 . The agglomerated ore according to claim 11 , wherein Formula (2) below is met:
Al
2
O
3
+
SiO
2
≥
3.5
mass
%
,
(
2
)
where Al 2 O 3 is a component concentration (mass %) of Al 2 O 3 in the agglomerated ore, and SiO 2 is a component concentration (mass %) of SiO 2 in the agglomerated ore.
20 . The agglomerated ore according to claim 6 , wherein Formula (2) below is met:
Al
2
O
3
+
SiO
2
≥
3.5
mass
%
,
(
2
)
where Al 2 O 3 is a component concentration (mass %) of Al 2 O 3 in the agglomerated ore, and SiO 2 is a component concentration (mass %) of SiO 2 in the agglomerated ore.Join the waitlist — get patent alerts
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