EP0052429A1
Expired / Lapsed
EP
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Method and apparatus for thermally treating pulverulent material
Assignee: FLSmidth and Co AS
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Filing: 1981-10-20
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Granted: —
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Expires: 2001-10-20
Abstract
Abstract A method of sintering a pulverulent material wherein the material is heated to a treating temperature in gaseous suspension in a duct (1) from which it is discharged with a rotary flow in the upper end of a slightly inclined rotating cylindrical reaction chamber (2) so that the material is separated from the suspension and deposited on the wall of the reaction chamber and slides down the chamber to an outlet.
Inventors
- 👤 Hans Brun Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 05:09
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
A method of thermally treating pulverulent material in a cylindrical reaction chamber (2) with an axis slightly inclined to the horizontal after the material has been heated to the treating temperature outside the reaction chamber suspended in a gas, characterised by separating the material heated to the treating temperature from-the suspension in the upper end of the reaction chamber by introducing the suspension with a tangential velocity component into the upper end of the reaction chamber; keeping the reaction chamber rotating slowly whereby the separated material is thermally treated during its passage down the reaction chamber; discharging the thermally treated material from the lower end of the reaction chamber; and withdrawing the gas from the reaction chamber through one of its ends.
Claim 2
Independent Claim
122 words
A method of thermally treating pulverulent material in a cylindrical reaction chamber (2) with an axis slightly inclined to the horizontal after the material has been heated to the treating temperature outside the reaction chamber suspended in a gas, characterised by separating the material heated to the treating temperature from-the suspension in the upper end of the reaction chamber by introducing the suspension with a tangential velocity component into the upper end of the reaction chamber; keeping the reaction chamber rotating slowly whereby the separated material is thermally treated during its passage down the reaction chamber; discharging the thermally treated material from the lower end of the reaction chamber; and withdrawing the gas from the reaction chamber through one of its ends.
Claim 3
Dependent Claim
56 words
A method according to claim 1, characterised in that the tangential velocity component of the suspension is provided by introducing the suspension close to the cylindrical wall of the reaction chamber in a direction substantially parallel to a tangent to the closest part of the wall and almost perpendicular to the axis of the reaction chamber.
Claim 4
Dependent Claim
33 words
A method according to claim 1, characterised in that the tangential velocity component of the suspension is provided by bringing the suspension into rotation before it is introduced axially into the reaction chamber.
Claim 5
Independent Claim
25 words
A method according to any one of the preceding claims, characterised in that the gas is withdrawn from the reaction chamber through its upper end.
Claim 6
Independent Claim
26 words
A method according to any one of claims 1 to 3, characterised in that the gas is withdrawn from the reaction chamber through its lower end.
Claim 7
Dependent Claim
109 words
Apparatus for thermally treating pulverulent material by a method according to any one of claims 1 to 5, characterised in comprising a cylindrical member (2) which is rotatable about an axis slightly inclined to the horizontal and.which has stationary end walls and a rotary drive, to provide the cylindrical reaction chamber; a suspension inlet duct (1) leading to the upper end of the reaction chamber in a plane substantially tangential to the inner circumferential surface of the reaction chamber; a gas outlet duct (7) connected to one end of the reaction chamber; and an outlet (23) for the thermally treated material at the lower end of the reaction chamber.
Claim 8
Dependent Claim
39 words
Apparatus according to claim 6, characterised in that the reaction chamber is provided with a constriction member (21) situated at a distance from the suspension inlet duct constituting approximately one third of the total length of the reaction chamber.
Claim 9
Dependent Claim
85 words
Apparatus according to claim 6 or claim 7, characterised in that the tangential relationship between the suspension inlet duct and the upper end of the reaction chamber is provided by connecting the suspension inlet duct (1) to an inlet opening (6) in the upper end wall (5) close to the cylindrical wall of the reaction chamber so that the inlet duct leads substantially parallel to a tangent to the closest part of the cylindrical wall and almost perpendicular to the axis of the reaction chamber.
Claim 10
Dependent Claim
71 words
Apparatus according to claim 6 or claim 7, characterised in that the tangential relationship between the suspension inlet duct and the upper end of the reaction chamber is provided via a stationary cylindrical member (11) which is coaxial with and smaller in diameter than the reaction chamber and which provides a spiral flow chamber with a tangential suspension inlet (1) and an axial suspension outlet (15) communicating with the reaction chamber.
References Cited (Backward Citations)
GB457957A
Cited
US3603568A
Cited
GB1396402A
Cited
GB1446241A
Cited
FR2279043A1
Cited
DE2738987A1
Cited
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