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EP0177523A1 - Procede de traitement thermique de materiau pouvant s'ecouler, contenant du silicate alumineux, gonflable ou rendu gonflable - Google Patents

Procede de traitement thermique de materiau pouvant s'ecouler, contenant du silicate alumineux, gonflable ou rendu gonflable

Info

Publication number
EP0177523A1
EP0177523A1 EP85901431A EP85901431A EP0177523A1 EP 0177523 A1 EP0177523 A1 EP 0177523A1 EP 85901431 A EP85901431 A EP 85901431A EP 85901431 A EP85901431 A EP 85901431A EP 0177523 A1 EP0177523 A1 EP 0177523A1
Authority
EP
European Patent Office
Prior art keywords
shaft
piles
granules
grate bars
grate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85901431A
Other languages
German (de)
English (en)
Inventor
Erich Sundermann
Hanno Laurien
Wolfgang Vahlbrauk
Hans Reye
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PERFLUCTIV-CONSULT AG
Perfluktiv-Consult AG
Original Assignee
PERFLUCTIV-CONSULT AG
Perfluktiv-Consult AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PERFLUCTIV-CONSULT AG, Perfluktiv-Consult AG filed Critical PERFLUCTIV-CONSULT AG
Publication of EP0177523A1 publication Critical patent/EP0177523A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/02—Treatment
    • C04B20/04—Heat treatment
    • C04B20/06—Expanding clay, perlite, vermiculite or like granular materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/16—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path
    • F27B9/18—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers
    • F27B9/185—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a circular or arcuate path under the action of scrapers or pushers multiple hearth type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material

Definitions

  • the invention relates to a method and a device for the thermal treatment of expandable or expandable aluminosilicate-containing free-flowing material in piles, in which the piles are housed in a plurality in separate stages one above the other and with free gaps from one pile to another in a shaft and after predetermined dwell times in the individual floors are each conveyed with the lowest pile (s) by discharging them from top to bottom through the shaft and during which the goods are acted upon by means of hot gases introduced into the free spaces. It is known to treat porous additives from expandable material in the aforementioned manner (DE-AS 11 65 477).
  • the material to be expanded and broken into the desired grain size such as clay or oil shale
  • the material to be expanded and broken into the desired grain size is introduced into chambers of a shaft which are provided one above the other and each of the chambers is only partially filled, so that between the heap in the respective chamber and the one above it located in the bottom of the next chamber consisting of slats rotatable about the longitudinal axis, a free space remains in which the fuel gases generated by burners arranged laterally in the walls of the shaft are introduced.
  • the aggregates are mechanically loosened by the fact that the floors are driven in rotation and equipped with teeth pointing downwards and reaching in the vicinity of the next floor.
  • the invention has for its object to provide a method of the type mentioned so that a short-term and uniform thermal treatment of all the good particles in the piles is achieved and a different temperature control and treatment of the goods with differently composed gases during the residence times in the individual floors is made possible.
  • the above object is achieved according to the invention in that granules of approximately uniform size with longitudinal and transverse dimensions in the range from 6 to 26 mm are formed from the material before it is fed to the shaft, dried at temperatures up to 360.degree. C. and metered according to the respective bulk volume and be distributed evenly over an area that corresponds to the cross-sectional area of the shaft, so that piles are formed with the same layer thickness over their cross-section and the piles in the shaft are each supported by grates, that the piles during several of the successive dwell times on the various grates by the introduced into the free spaces between adjacent piles, however Hot gases discharged from other gaps flow in the direction perpendicular to the layer plane and the granules are preheated for some dwell times with gases below the pre-blowing temperature of the respective good and then pre-inflated for at least one further dwell time at a gas temperature above the pre-blowing temperature of the respective good and in the pre-inflated state in bulk Further processing are carried out, the piles being dissolved after the respective dwell time on the grates by
  • the piles can be used on the individual floors or in groups of floors with heating gases of different temperatures or different chemical composition and different flow rate can be applied.
  • the number of piles and their treatment time on the grates can be individually determined depending on the raw material and process objective and thus a process control adapted to the respective good can be achieved.
  • the arrangement of the heaps on the grates in the individual levels not only enables the flow through the heaps in the direction of the longitudinal axis of the shaft, but at the same time also with appropriately controlled removal of at least some of the grate bars from the grate level for the uniform layer formation in the next Floor cheap
  • the desired trickling movement can be generated either by lowering or by lifting a part of the grate bars, the lifting paths or lifting heights and the transfer of the grate bars into two or three different levels depending on the particular material and the shape of the granules and the respective conditions can be set accordingly, the cheapest results can be determined by appropriate trickle tests.
  • the trickle time is usually set to 2 to 4 seconds per pile.
  • the granules can be dosed outside the shaft and, when they are transferred into the shaft, distributed on the top grate to form the pile with the same layer thickness over the cross-section. It is expedient if at least the uppermost pile in the shaft is shielded against the flow of hot gases. In this way, the uppermost pile in the shaft also helps to shield the interior of the shaft.
  • the hot gases it is expedient for the hot gases to flow through the piles during one dwell time in one direction and during other dwell times in the opposite direction. This is particularly easily possible, for example, if the hot gases introduced into one chamber are discharged from the two adjacent chambers after flowing through the heap, or vice versa, so that, for example, the heap initially flowed from bottom to top when transferred to the next chamber by the same Gas flow is flowed through from top to bottom without this
  • the heating power when there is mutual flow through a bed which may be desired with the aim of equalizing the temperature in the bulk material in the case of its convective heating, is lower than the heating power in the case of one-sided convective heating under otherwise identical conditions.
  • the direction of flow of the gas flow is determined during the period in which the Bulk bodies continue to fall to the next stage, switched.
  • This switching of the gas flow direction causes the advantageous one-sided gas flow for each individual bulk body in the described process during its entire stay in the shaft.
  • a hot neutral or reducing gas flows through the piles during preheating and an oxidizing gas for pre-blowing.
  • the blowing temperature of the granules is shifted upwards by neutral or reducing gases, while oxidizing gases promote the blowing of the granules at low temperatures.
  • the new process offers a particular advantage in that it enables the production of layered materials from the pre-expanded pellets in a particularly simple manner.
  • it is expedient to meter the granules of each layer in a quantity corresponding to the individual layer thickness to a heap and, after pre-blowing, to bring the heap together in the desired stratification and to pass it on for further processing.
  • components in plate or block form which are monolithic composite elements, one layer of which, for example, has an extraordinarily high thermal insulation, while the other layer, as a load-bearing layer, has a particularly high compressive strength.
  • the piles are partially and locally shielded from flowing through the gases, at least for some dwell times, and flowed through in the other areas until the loosening point is reached or exceeded.
  • a kind of partial re-layering of the granules from the respective partially flow-through areas into the non-flow-through areas is achieved, with the local change in the partial flow repeatedly causing the previously shifted granules to be returned.
  • the piles on the way through the shaft are shielded from flowing through of the hot gases during the first or first two dwell times, during a subsequent row, in particular of four to ten dwell times, from a neutral one or reduced gas at a temperature just below the pre-inflating temperature, in opposite directions from residence time to residence time, and that during the last residence time, an oxidizing gas flows through the aggregates at a temperature above the pre-inflating temperature of the granules.
  • the duration of the dwell times of the piles in the individual floors is in practice about a few minutes depending on the layer thickness of the piles and its gap volume.
  • the flow rates of the hot gases in the inflow area of the heaps are in the order of magnitude between 0.5 and 4 m / sec.
  • the temperatures of the hot gases in the practical application of the process are of the order of 800 ° C during the first dwell times of the preheating and can be up to 940 or 950 ° C during the subsequent dwell times of the preheating, while the temperature of the heating gas in the pre-blowing phase is over 1,000 ° C, but must be adjusted in all phases of the composition and according to the expandability of the material.
  • Devices for carrying out the method are based on a shaft, the interior of which is divided into chambers for receiving the piles by intermediate floors, which have adjustable floor elements for batch-wise conveying of the piles through the shaft and in the shaft walls have free through openings to the chambers.
  • these devices are characterized in that above or in the upper part of the shaft a device for uniformly distributing the pre-metered material over the shaft cross-section onto a grate forming the bottom of a distribution chamber is provided, that the intermediate floors for forming the chambers also consist of grids and all Gratings at least partially consist of movable grate bars with actuating devices for temporarily increasing the free spaces between adjacent grate bars by moving a part of the grate bars out of the grate plane, and with the passage openings Gas supply and discharge lines in the shaft walls are connected to the control devices assigned to them.
  • the aforementioned shaft which in its form of training has an independent inventive significance, is not only suitable for preheating and pre-blowing the granules from the aluminosilicate-containing material, such as expanded clay or the like, but can also be used for the predrying of these granules in the described embodiment are used, only in comparison with the above-described method for pre-expanding the granules a different temperature control and possibly also a different sequence from the pre-heating and pre-expanding process of the flow direction of the piles.
  • the shaft is used for the drying process, the components that come into contact with the hot gases can be made of a less heat-resistant material, since the drying temperatures are significantly lower than the preheating and preheating temperatures.
  • the shaft for preheating and for pre-inflation, at least the grates of the pre-inflation zone and the supporting parts of the grids coming into contact with the hot gases in the pre-inflation zone must consist of a correspondingly highly heat-resistant material.
  • SiSiC has proven itself as a material for this purpose up to temperatures of 1,350 ° C and reaction-sintered SiC up to temperatures of 1,600 ° C.
  • the arrangement and design of the grate bars is advantageously carried out in such a way that the movable grate bars of each bar grate form at least one structural unit by connecting their ends, which can be moved out of the plane of the fixed grate bars by the actuating devices.
  • the already described transfer of the movable grate bars into two or three levels is possible in order to ensure the transfer of the piles from floor to floor with the same layer thickness of the piles over the entire shaft cross-section, depending on the shape and size of the granules to be treated, as well as the grate bars .
  • the structural units formed from the movable grate bars can advantageously be lowered into a level below the level of the fixed grate bars and retractable into the level of the fixed grate bars by means of a lifting device.
  • these structural units can also be raised, but lowering is generally more expedient if the goods not particularly prone to bridging.
  • the invention provides that the grate bars, seen in cross section, have an undercut profile in their upper part and are equipped with pushed-on, replaceable, rider-shaped profile parts, which are expediently horseshoe-shaped with projections in the longitudinal direction of the grate bars as stops with adjacent profile parts are.
  • a grid is located below the grates on which the granules are pre-expanded - Shaped insert is provided to form parallel flow channels, and that about horizontal axes rotatable flaps are provided in the flow channels, which can be pivoted alternately or in groups into the shaft level or perpendicularly to the fields of a chessboard.
  • the drawing shows a schematic representation of exemplary embodiments of devices for carrying out the method and details of these devices.
  • Fig. 1 shows a longitudinal section through a shaft for pre-blowing pre-dried granules made of an aluminosilicate material, such as clay, Fig.2a in an enlarged view part of the
  • Fig.2b is a plan view of the arrangement according to Fig.2a, 3a and 3b possible positions of the grate bars in their arrangement and design according to Fig. 2a and 2b
  • 4 is a perspective view of two grate bars with partially mounted rider-shaped profile parts
  • FIG. 5 shows a partial top view of grate bars according to FIG. 4 with rider-shaped profile parts applied
  • FIG. 6 shows a longitudinal section through a shaft similar to FIG. 1 for the treatment of granules for the production of composite panels or blocks
  • FIG. 7 is a partial longitudinal section through a shaft according to FIGS. 1 and 6 in an enlarged view with rotatable flaps provided under the grate,
  • Fig. 8 is a bottom view against the
  • FIG. 9 an enlarged cross-section of a cross section through one of the flaps according to FIGS. 7 and 8,
  • Fig. 10 is a partial longitudinal section through a shaft with grids that can be inserted laterally.
  • the shaft shown in FIG. 1 has walls denoted overall by 1 and can have a square or rectangular cross section.
  • grids 2 are spaced one above the other in the walls, so that chambers 3 are formed between adjacent grids 2, which only partially. are filled by granular piles 4, which consist of aluminosilicate-containing raw material, such as clay or the like.
  • the shaft shown is used to preheat and pre-inflate the granules in the piles.
  • the shaft which in the example shown is composed of annularly closed module parts 5, each with a grate 2 held therein, is closed at the top by a closure housing 6 closed, in which a metering device 7 and a distribution device 8 located below for the material to be fed to the top grate is arranged.
  • the quantity of the granules intended for a pile 4 is taken up from a supply not shown or via a feed device before the granules are transferred to the uppermost grate 2 via the already mentioned distributor device 8.
  • the shaft is equipped with a slide 10 optionally closing or releasing its discharge opening 9, which is arranged above a mold 11 into which the aggregate 4 of the granules treated on the lowermost grate 2 is transferred by free fall after the treatment has ended becomes.
  • passage openings are provided on both sides, which are connected to gas supply and discharge lines 12, 13 or 14 and 15. These lines, in turn, are connected via control devices to delivery fans and heating devices for the gases to be supplied to the shaft.
  • the control devices mentioned generally also include those which, if necessary, allow the flow direction to be reversed.
  • a partition wall is provided between the two uppermost grates 2 and the two uppermost chambers 3, which partition wall is formed from pivotable slats 16 and can be converted into the closed and open positions by adjusting the slats.
  • a similar partition made of fins 16 is between the in The lowest chamber, which also forms the discharge chamber, and the chamber above it.
  • a grate-shaped insert 29 which serves to form parallel flow channels 30, and in which flaps 17 are arranged and rotatable about a horizontal axis and in some cases in a blocking position and in part in a passage position, can also be seen below the bottom grate in the shaft.
  • the grates arranged in the shaft consist, according to FIGS. 2a and 2b, partly of fixed grate bars 18 and partly of movable grate bars 19 and 20, the latter relative to the fixed grate bars 18 in the illustrated example of FIGS. 2a and 2b from the grate plane upwards are movable in order to temporarily enlarge the free spaces between adjacent grate bars.
  • crank or swivel arms 22 are provided in corre sponding niches 21 on the inside of the shaft wall, which can be pivoted from the outside via an actuating shaft 23 into the different positions between the positions, as shown in FIG. 2a are reproduced in the left and right parts.
  • the movable grate bars 19 and 20 are elongated compared to the fixed grate bars and combined to form a unit that can be raised and lowered, the lengthening of the grate bars 2a have the shape of bends 19a and 20a of different lengths. The result of this is that when the crank arms 22 are pivoted about the pivot shaft which can be actuated from the outside of the shaft by a pivot drive, the grate bars 19 and 20 are transferred to the different heights, as can be seen in the right half of FIG. 2a.
  • the grate bars shown schematically with regard to their cross-sectional design in FIGS. 2a and 2b expediently have in practice the shape shown in FIGS. 4 and 5.
  • the grate bars which can be designed as solid or hollow profiles, have an undercut profile 24 in cross section in their upper part and are equipped with pushed-on replaceable, rider-shaped profile parts 25 which are pushed onto the grate bars .
  • the rider-shaped profile parts are horseshoe-shaped and with projections 26 pointing in the longitudinal direction of the grate bars as stops with adjacent rider-shaped profile share equipped.
  • the grate bars When the tab-shaped profile parts are packed tightly on the grate bars, the grate bars have a shape as can be seen in the top view of FIG. 5 of two adjacent grate bars.
  • the rider-shaped profile parts have the effect that the bottom layer of the granules in each pile 4 cannot close the gaps between adjacent grate bars, even if the granules have a cylindrical shape, in which without the rider-shaped profile parts, with the rolling movement of the granules with a row. shaped arrangement in the spaces between the grate bars must be expected.
  • the lowest pile 4 in the shaft is flowed through by the supply of hot oxidizing gases at a temperature of approximately 1,100 ° C. in the region of the flow channels 30 released by the flaps 17, the gas after the flow in a closed position of the slats provided above the lowest pile 4 66 is discharged through the gas discharge line 15.
  • the flow velocity of the gas against the lowest pile in the shaft is set to values of, for example, 4 m / sec, by means of which the loosening tion point of the granules located in the pile is reached or exceeded, so that in the area above the channels 30 through which flow occurs, the granules are partially moved and these reach the area above the channels 30 not through the loosening and the flow.
  • the pile 4 located above the lower pivotable slats 16 forms an additional barrier layer to the slats 16 located in the closed position and no hot gas flows through them.
  • the four heaps following in the height direction are partially flowed through from top to bottom and partly from bottom to top, a common gas supply line 12 and also a common gas discharge line 13 being assigned to these heaps.
  • the aggregates are exposed to a reducing gas at a temperature between 800 and
  • the second pile from the top in the illustrated shaft according to FIG. 1 in turn forms a barrier layer, since above this pile a partition wall formed by the pivotable slats 16 is provided, which is in the closed position during the flow through the pile located. Finally, even the uppermost pile in the shaft is not flowed through by hot gases. This is also not possible because this pile is only formed on the uppermost grate by the distribution device 8, during a time in which the other piles are flowed through in the manner described.
  • the pivotable slats 16 above this grate are pivoted into the open position and, by actuating the grate bars of the grate located above these slats, the pile located on them is dissolved and shaped in the manner already described an even trickle flow to the lowest grate by free fall.
  • the height dimensions of the piles in practice are approx. 100 mm.
  • the respective trickle times are usually 2 to 4 seconds per pile.
  • the dwell times are approximately 180 seconds per floor.
  • the flow of the hot gases through the piles indicated by arrows in FIG. 1 can, if appropriate, be changed in their direction if the reversing flaps or valves are arranged in the gas supply and discharge lines, even during the dwell time of the piles become.
  • the structure of the shaft according to FIG. 6 corresponds to the shaft according to FIG. 1, but a somewhat different flow guidance is provided, such as the gas supply and discharge lines 12 and 13 in the area of the preheating zone and 14 and 15 in the area of the pre-blowing zone demonstrate.
  • a somewhat different flow guidance is provided, such as the gas supply and discharge lines 12 and 13 in the area of the preheating zone and 14 and 15 in the area of the pre-blowing zone demonstrate.
  • yet another grate with a pile located thereon is provided as a barrier layer, which is of particular importance in the production of composite panels from two or more different materials in a layered construction comes to.
  • piles of the different materials are conveyed through the shaft in the layer sequence in the manner described and transferred to the mold 11 when discharged from the shaft.
  • FIGS. 7 to 9 show details with regard to the arrangement and design of the flaps 17 which can be rotated about their horizontal axes.
  • these flaps 17 are arranged in the flow channels 30 of a grate-shaped insert 29 and correspond to them - Chend the fields of a chessboard held so that adjacent flaps each take a different position.
  • two horizontal axes 27 and 28 according to FIG. 9 arranged one above the other are provided, on which the flaps 17 of each row are held alternately.
  • FIG. 9 also shows the practical design of the flaps 17 and their arrangement on the horizontal axes, the flap 17 shown is received on the axis 27, while it receives the axis 28 of the adjacent flaps in a recess without this Axis 28 hinders the pivoting movement of the flap 17 shown in the direction of the arrows shown.
  • the flaps 17 adjacent to the flap 17 shown are arranged on the axis 28 pivoted by 180 ° and receive the axis 27 in their recesses.
  • the arrangement described makes it possible to move all the flaps into the locked position or all the flaps into the open position and also to move adjacent flaps into the different positions, as shown in FIG.
  • the grate-shaped insert 29 as well as the flaps 17 held therein and the load-bearing axes 27 and 28, the grids 2 are also made of SiSiC or reaction-reduced SiC and also expediently provided with a cover layer made of boron nitride.
  • the shaft wall 1 can also be designed as a continuous shaft wall and, according to the example in FIG. 10, have window openings 31 into which the
  • Gratings 2 in the form of the above-mentioned units can be inserted laterally.
  • the grates 2 consist of the movable and stationary grate bars described in connection with FIGS. 2a and 2b or 3a and 3b and the associated devices for the lifting movement of the grate bars which can be moved out of the grate plane.
  • the grids 2 shown in FIG. 10, which are designed as structural units, are held in a groove-shaped recesses 32 in the side shaft walls by means of a support device 33.
  • the window opening 31 in the shaft wall 1 can be closed by a filler 34 adapted to the window opening, which consists of the same material as the shaft wall 1.
  • a cover plate 35 is provided which, after the filler 34 has been inserted, is screwed into the window opening 31 with the shaft wall 1 and so secures the position of the filler 34 in the inserted state. It can be seen that an exchange of the grids designed as a structural unit is possible with very little effort in the intended configuration of the shaft according to FIG. 10.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

Dans le procédé de traitement thermique de granulats gonflables à base d'argile ou autre, les granulats sont introduits en tas (4) avec des intervalles libres entre eux dans un puits (1) et traversent ledit puits (1) par étages de haut en bas. Les tas (4) sont soutenus par des grilles (2) dont les barreaux peuvent être sortis temporairement au moins en partie du plan de la grille (2) de telle manière que les divers tas (4) sont amenés sous la forme d'un écoulement ruisselant temporairement régulé à l'étage suivant, si bien qu'une épaisseur constante par rapport à la section transversale est conservée. Dans les divers étages, les tas (4) sont traversés par des gaz chauds introduits latéralement dans le puits (1) et évacués de l'autre côté selon une direction perpendiculaire au plan de la couche. Dans les étages supérieurs du puits s'effectue un préchauffage, alors que, au moins dans les étages inférieurs, est effectué un prégonflage des granulats avec des gaz de températures différentes et une combinaison chimique avec transfert thermique avantageux et de grande efficacité de la mécanique des fluides.
EP85901431A 1984-03-24 1985-03-16 Procede de traitement thermique de materiau pouvant s'ecouler, contenant du silicate alumineux, gonflable ou rendu gonflable Withdrawn EP0177523A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843410897 DE3410897A1 (de) 1984-03-24 1984-03-24 Verfahren und vorrichtung zur thermischen behandlung von blaehfaehigem oder blaehfaehig gemachtem aluminosilikathaltigem rieselfaehigem gut
DE3410897 1984-03-24

Publications (1)

Publication Number Publication Date
EP0177523A1 true EP0177523A1 (fr) 1986-04-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85901431A Withdrawn EP0177523A1 (fr) 1984-03-24 1985-03-16 Procede de traitement thermique de materiau pouvant s'ecouler, contenant du silicate alumineux, gonflable ou rendu gonflable

Country Status (8)

Country Link
US (1) US4664623A (fr)
EP (1) EP0177523A1 (fr)
JP (1) JPS61501508A (fr)
AU (1) AU4152985A (fr)
DD (1) DD231782A5 (fr)
DE (1) DE3410897A1 (fr)
IT (1) IT1187651B (fr)
WO (1) WO1985004468A1 (fr)

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DD231782A5 (de) 1986-01-08
JPS61501508A (ja) 1986-07-24
US4664623A (en) 1987-05-12
DE3410897A1 (de) 1985-10-03
IT1187651B (it) 1987-12-23
IT8520058A0 (it) 1985-03-25
AU4152985A (en) 1985-11-01

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