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1. WO1991000251 - FEEDING SYSTEM FOR A LIME REBURNING KILN

Publication Number WO/1991/000251
Publication Date 10.01.1991
International Application No. PCT/FI1990/000172
International Filing Date 28.06.1990
Chapter 2 Demand Filed 19.01.1991
IPC
C04B 2/10 2006.01
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
2Lime, magnesia or dolomite
10Preheating, burning, calcining or cooling
F27B 7/16 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS, OVENS OR RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
14with means for agitating or moving the charge
16the means being fixed relatively to the drum
F27B 7/20 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS, OVENS OR RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
20Details, accessories, or equipment peculiar to rotary-drum furnaces
F27B 7/32 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS, OVENS OR RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
20Details, accessories, or equipment peculiar to rotary-drum furnaces
32Arrangement of devices for charging
CPC
C04B 2/10
CCHEMISTRY; METALLURGY
04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE
2Lime, magnesia or dolomite
10Preheating, burning calcining or cooling
F27B 2007/163
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
14with means for agitating or moving the charge
16the means being fixed relatively to the drum, ; e.g. composite means
161the means comprising projections jutting out from the wall
162the projections consisting of separate lifting elements, e.g. lifting shovels
163using only a ring of lifting elements to lift the charge
F27B 2007/2008
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
20Details, accessories, or equipment peculiar to rotary-drum furnaces
2008Devices for reintroducing dust in the drum
F27B 7/3205
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
27FURNACES; KILNS; OVENS; RETORTS
BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
7Rotary-drum furnaces, i.e. horizontal or slightly inclined
20Details, accessories, or equipment peculiar to rotary-drum furnaces
32Arrangement of devices for charging
3205Charging
Applicants
  • A. AHLSTROM CORPORATION [FI/FI]; SF-29600 Noormarkku, FI (AllExceptUS)
  • AHVENAINEN, Arto [FI/FI]; FI (UsOnly)
Inventors
  • AHVENAINEN, Arto; FI
Agents
  • A. AHLSTROM CORPORATION; Patent Dept. P.O. Box 18 FIN-48601 Karhula, FI
Priority Data
89322403.07.1989FI
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FEEDING SYSTEM FOR A LIME REBURNING KILN
(FR) SYSTEME D'ALIMENTATION POUR FOUR DE RECUISSON DE LA CHAUX
Abstract
(EN)
A method and apparatus for heat treatment of lime mud comprises drying of the lime mud to be introduced into the lime reburning kiln (5) in a pneumatic dryer (3) by means of flue gases discharged from the lime reburning kiln in order to regenerate the lime content of the lime mud. From a drying filter (6), the lime mud thickened to a dry solids content of over 75 %, preferably to 80 %, is introduced into a feed chamber (2) through which an adjustable portion of the flue gas is conducted. Depending on the gas amount, 100 % or less of the lime mud is entrained with the gas into the dryer (3), the remaining portion falling into the lower section (14) of the feed chamber, wherefrom it is further transferred into the lime reburning kiln (5).
(FR)
Procédé et appareil pour le traitement à chaud de boues résiduaires de chaux comprenant le séchage desdites boues devant être introduites dans le four de cuisson de la chaux (5) dans un séchoir pneumatique (3) à l'aide de gaz de fumées déchargés dudit four de manière à régénérer la teneur en chaux des boues résiduaires. Les boues que l'on a épaissies à une teneur en matière sèche supérieure à 75 %, et de préférence à 80 %, sont amenées depuis un filtre de séchage (6) à une chambre d'alimentation (2) à travers laquelle est conduite une partie réglable des gaz de fumées. Selon la quantité de gaz, 100% ou moins des boues résiduaires de chaux sont entraînés avec ledit gaz dans le séchoir (3); la portion qui reste tombe dans la partie inférieure (14) de la chambre d'alimentation, d'où on la transfère ensuite au four (5) de cuisson de la chaux.
Also published as
Latest bibliographic data on file with the International Bureau