EP3903057A1 - Four à longerons mobiles permettant de broyer et d'évacuer en continue la calamine - Google Patents
Four à longerons mobiles permettant de broyer et d'évacuer en continue la calamineInfo
- Publication number
- EP3903057A1 EP3903057A1 EP19845707.9A EP19845707A EP3903057A1 EP 3903057 A1 EP3903057 A1 EP 3903057A1 EP 19845707 A EP19845707 A EP 19845707A EP 3903057 A1 EP3903057 A1 EP 3903057A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- beams
- fixed
- refractory
- mobile
- lrm
- 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.)
- Granted
Links
- 238000007599 discharging Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 5
- 239000004567 concrete Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000011819 refractory material Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000003303 reheating Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229940105847 calamine Drugs 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052864 hemimorphite Inorganic materials 0.000 description 3
- 235000014692 zinc oxide Nutrition 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- CPYIZQLXMGRKSW-UHFFFAOYSA-N zinc;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+3].[Fe+3].[Zn+2] CPYIZQLXMGRKSW-UHFFFAOYSA-N 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000497 Amalgam Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- 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
- F27B9/20—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 substantially straight path tunnel furnace
- F27B9/201—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 substantially straight path tunnel furnace walking beam furnace
-
- 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
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
-
- 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
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
- F27D25/008—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag using fluids or gases, e.g. blowers, suction units
Definitions
- the invention relates to heating ovens with movable beams intended for heating steel products, for example carbon steel or stainless steel, in particular slabs, blooms, blanks or billets, to a temperature suitable for their rolling to hot.
- the oven allows the products to be brought to high temperatures, around 1150 ° C for carbon steel.
- the heating of the oven is commonly carried out by burners operating in slight excess of air, which results in the presence of oxygen in the oven.
- Significant oxidation of the products in the oven results from the combination of high temperature and the presence of oxygen.
- the steel reheating furnaces operate continuously and have significant production capacities, ranging for example from 120 t / h to 650 t / h.
- the weight loss of products resulting from oxidation is commonly around 0.6%. When it detaches from the products, carbon deposits on the bottom of the oven on which it accumulates.
- calamine By the term calamine, the present description designates not only the calamine proper resulting from the oxidation of the products, but more generally any solid polluting residue.
- the scale can be removed during periodic shutdowns of the oven. This solution is not satisfactory, because it leads to a significant loss of production due to the time necessary for the cooling of the oven, the manual evacuation of the scale, then the rise in temperature of the oven.
- the oven can be equipped with scouring doors from which an operator will quash, that is to say scrape and mechanically remove the scale using a tool, such as a rake. This solution is also not satisfactory, since access to the scale located in the center of the oven is not easy. Furthermore, the opening of these scouring doors causes air to enter the oven, which has the effect of increasing the oxidation of the products present inside.
- the stringers have cooled andirons and keels.
- the movable beams allow the transport of products in the oven following a rectangular cycle comprising a first phase of ascent which makes it possible to lift the products from the fixed beams. It is followed by a second phase of horizontal transport then a third phase of depositing the products on the fixed beams. The products are thus displaced by one step on the fixed beams before the fourth phase of backward movement of the mobile beams in their initial position.
- the total duration of a rectangular cycle is approximately 55 seconds.
- the side members can be offset transversely towards the exit of the oven, also called the racking area.
- the hearth is thicker than in the rest of the oven, that inclined surfaces are installed in this thicker area of the sole, with a slope of walls sufficient to avoid sloping, so as to collect the scale and the residues and to lead them to evacuation conduits which open into tanks water, and that the water trays are fixed on the translation frame allowing the continuous evacuation of a part of the scale from the evacuation conduits, keeping the oven watertight.
- the increase in the thickness of the sole in fact allows for the installation of hoppers formed by the inclined surfaces having a significant slope while having a wide opening flush with the sole in order to cover the maximum possible surface. This characteristic contributes to the evacuation of scale or other residue.
- the Applicant has continued to work on the possibilities of improving such ovens with movable beams.
- a refractory beam oven comprising movable beams comprising movable crawlers supported by movable keels, and stationary beams comprising fixed crawlers supported by fixed keels, and means for drives arranged to move a lifting frame and a traveling frame according to a rectangular movement cycle having two vertical positions, respectively upper and lower, and an intermediate vertical position according to which the mobile andirons are at the same height as the fixed andirons mobile andirons projecting above the fixed andirons in the upper position, the mobile andirons being at a level lower than the fixed andirons in the lower position.
- the oven further comprises:
- the mobile refractory beams are arranged transversely between the fixed refractory beams and separated on each side of the fixed refractory beams by a space, the mobile keels are fixed on the mobile refractory beams, and the mobile refractory beams are fixed on the translational chassis and arranged substantially at the same height as the fixed refractory beams in the intermediate position.
- the oven further comprises a plurality of longitudinal water tanks arranged in line with the separation spaces and fixed on the fixed refractory beams delimiting a separation space, and a plurality of skirts fixed on the mobile refractory beams delimiting said separation space and plunging in the water tanks.
- the fixed refractory beams and the mobile refractory beams can extend over all or part of the length of the furnace.
- the fixed refractory beams and the mobile refractory beams have an inclined and rounded profile on the upper part, the inclined profile possibly having a slope forming with the horizontal an angle greater than the angle of talutement of the scale.
- the fixed refractory beams and the mobile refractory beams are made of concrete with low cement content, based on tabular alumina and spinel.
- the oven may further include squeegees attached to the plurality of skirts.
- the squeegee profile can be adapted to promote crushing and evacuation of the scale.
- the squeegees can have, for example, a spade-shaped profile.
- the water tank can be fitted with flush toilets arranged to flush the water, and the scale, from the rack to the rack.
- the furnace may include refractory beams over only part of the length of the furnace.
- At least one water tank may have a rectangular shape, at least one transverse section of the water tank ensuring a connection between two longitudinal sections of the water tank arranged on either side of a refractory beam.
- the oven comprises water trays equipped with two flushes at their end located on the charging side, allowing the evacuation of scale, and part of the water, in a transverse tank towards a central evacuation.
- a process for grinding and continuously discharging the scale in an oven with refractory beams comprising mobile beams comprising mobile crawlers supported by mobile keels, and fixed beams comprising fixed andirons supported by fixed pins, and drive means arranged to move a lifting frame and a translation frame according to a rectangular movement cycle having two vertical positions, respectively upper and lower, and an intermediate vertical position according to which the mobile andirons are at the same height as the fixed andirons, the mobile andirons projecting above the fixed andirons in the upper position, the mobile andirets being at a level lower than the fixed andirons in the lower position.
- the oven used in the continuous grinding and evacuation process of the scale comprises a plurality of fixed refractory beams extending longitudinally, a plurality of mobile refractory beams extending longitudinally, the mobile refractory beams being arranged transversely between the fixed and separate refractory beams on each side of the fixed refractory beams by a separation space, the movable keels being fixed on the mobile refractory beams, and the mobile refractory beams being fixed on the translation chassis and arranged at substantially the same height as the fixed refractory beams in the intermediate position, the oven further comprising a plurality of water tanks arranged in line with the separation spaces and fixed to one of the refractory beams, and a plurality of skirts, fixed to the other refractory beam delimiting said separation space, plunging into the water tanks, the ca laminate being crushed by the side members during its passage in the separation spaces and being continuously discharged by the plurality of water tanks.
- FIG.l is a schematic view in longitudinal section of a heating furnace with movable beams according to the prior art, with the part torn off in the central part,
- FIG.2 is a schematic view from above of the interior of the furnace shown in Figure 1
- FIG.3 is a schematic view in longitudinal section of a reheating furnace according to a first embodiment of the invention, with part torn off in central part,
- FIG.4 is a top view of the interior of the oven shown in Figure 3,
- FIG.5 has on its left part a half-section along section BB of Figures 3 and 4, and has on its right part a half-section along section A- A of Figures 1 and 2
- FIG.6 has three vertical positions of a movable refractory beam with respect to fixed refractory beams according to the invention of the furnace shown in Figure 3
- FIG.7 is a schematic view in longitudinal section of a reheating furnace according to a second embodiment of the invention, with the part torn off in the central part
- FIG. 8 is a top view of the interior of the furnace shown in FIG. 7,
- FIG.9 is a detail view on a larger scale of the oven represented in FIG. 7, with the right side part cut away,
- FIG.10 is a top view of the interior of a furnace according to a third embodiment of the invention.
- FIG.l 1 is a detailed view of a water tank shown in top view on the left part of the drawing and in cross section on the right part of the drawing, according to a first embodiment of the invention
- FIG.12 is a detailed view of a water tank shown in top view on the left part of the drawing and in cross section on the right part of the drawing, according to a second embodiment of the invention. Description of embodiments
- variants of the invention comprising only a selection of described characteristics, subsequently isolated from the other described characteristics, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.
- This selection includes at least one characteristic, preferably functional, without structural details, or with only part of the structural details if this part only is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art. .
- Figure 1 is shown schematically in side view a heating furnace F with movable beams 10 according to the prior art.
- the two extreme parts of the oven, on the charging side and on the charging side are shown, the central part being torn off.
- the loading side is located to the right of the figure and the delivery side to the left. This is the case for all the figures which represent an oven in side view.
- a translation chassis 3 rests on upper rollers 33 for translation of a lifting chassis 2 which itself rests on ramps 1 having an inclined plane, by means of the lower rollers 22.
- a drive means in a horizontal reciprocating movement, parallel to the longitudinal direction of the oven, is provided for the translation frame 3; another similar drive means (not shown) is provided for the lifting frame 2.
- These drive means are for example hydraulic cylinders. The combination of back and forth movements, and the vertical up and down movement due to the ramps 1, makes it possible to obtain a rectangular movement cycle.
- the mobile longitudinal members 10 comprise mobile keels 10Q and mobile chenets 10C, the andirons being supported by the mobile keels which are fixed below the translation chassis 3.
- the movable skittles 10Q cross the fixed floor 6.
- Fixed rails 11 comprising fixed skittles 11Q mounted on the floor 6 and fixed andirons 1 IC, the fixed andirons being carried by the fixed keels, are interposed between the mobile rails 10.
- the fixed hearth 6 has, on the laboratory side of the furnace, a part filled with refractory materials forming a fixed refractory hearth 6R.
- Oblong openings OB (FIG. 2), also called buttonholes, are provided in the sole 6 for the passage and the relative longitudinal movement of the movable pins 10Q.
- OB Oblong openings OB
- a plurality of squeegees 5 (FIG. 5) is fixed to the base of the skirts 7, over the length of the latter, and is thus immersed in the water tanks 4.
- the squeegees 5 allow the routing of the scale to hoppers recovery (not shown), placed at the end of the water tanks 4, by the relative movement between the water tanks 4 and the squeegees 5, obtained by combining the fixed position of the squeegees 5 and the rectangular movement of the water tanks water 4.
- the squeegees 5 fixed on the fixed skirts which open into the water tanks 4 push the quantity of scale located in the bottom water tanks 4 with a translation pitch from the outlet of the oven to the inlet of the oven, that is to say from the discharge to the charging, to the ends of the water tanks 4.
- Evacuation of the carbon recovered under the installation is ensured by evacuation pipes.
- the evacuation pipes open into, or are connected to, evacuation circuits provided with a membrane valve 20 (FIG. 1), acting as a flush 20, allowing each opening the evacuation of a quantity of scale and water which falls, via a transverse chute 21, into a wagon on wheels 23.
- a membrane valve 20 acting as a flush 20
- Figure 3 is shown schematically a first embodiment of an FF oven according to the invention.
- the two extreme parts of the oven, on the charging side and on the charging side are shown, the central part being torn off.
- the oven FF comprises the translation chassis 3 which rests on the upper rollers 33 for translation of the lifting frame 2 which itself rests on the ramps 1 having an inclined plane, via the rollers lower 22.
- the means for driving the lifting and translating frames are as in the prior art.
- the mobile longitudinal members 10 are also formed by mobile keels 12Q and mobile andirons 10C.
- the movable pins 12Q according to the invention are shorter than the movable pins 10Q according to the prior art. They are supported by a new type LRM mobile refractory beam.
- the LRM mobile refractory beam is placed, and fixed, on the translation frame 3 over the entire length of the furnace. According to another possibility, the LRM mobile refractory beam is placed on the translation chassis over only part, or more, of the length of the furnace.
- the movable keels 12Q pass through, and are fixed to, the mobile refractory beam LRM comprising refractory materials which rest on a metallic structure.
- a clearance J ( Figure 4) is provided at each movable spar, so that the longitudinal travel of the movable spar is possible.
- LRF fixed refractory beams have 13Q fixed keels and 1 IC fixed chenets, 1 IC fixed chenets being carried by 13Q fixed keels.
- the LRF fixed refractory beams are interposed between the LRM mobile refractory beams.
- the refractory materials of which the LRM mobile refractory beams and the LRF fixed refractory beams are made are refractory concretes with high operating temperature and high resistance to abrasion and impact. They can for example be concretes with a low cement content, based on tabular alumina and spinel. For example, concrete can contain 92% A1203 and 5% MgO.
- the refractory materials can be heavy concrete which has a particularly high density. After drying, this density is for example 3000 kg / m3 (possibly even going up to 6000 km / m3) against 2000 to 2300 km / m 3 for traditional concrete (for comparison the density of light concrete is between 300 and 2000 kg / m 3 ).
- the LRF fixed and mobile LRM refractory beams comprise a metallic lower part, on the side opposite the laboratory of the furnace, on which the refractory material rests.
- This metallic lower part is connected to the translation chassis for the mobile refractory beams and to the fixed sole for the fixed refractory beams.
- the fixed and movable skittles pass through the refractory material and are fixed on the metal underparts.
- the transverse juxtaposition of the mobile refractory beams LRM and the fixed refractory beams LRF according to the invention forms a functional equivalent of the refractory hearth 6R of the oven according to the prior art shown in the right part of figure 5.
- a space E is left between the mobile refractory beams LRM and the fixed refractory beams LRF, over the entire refractory height.
- the function of this space E is, in a first upper conical part, to guide the scale to an evacuation passage located in its lower part.
- the up and down and front-to-back translation movements of the mobile refractory beams relative to the fixed refractory beams allow the grinding of the scale and facilitate the passage of the scale without blocking an amalgam, or even pieces, of refractory lining.
- the distance between the side members in the lower part of space E is sufficient for the passage of the scale after grinding. In its lower part, it is for example between 50 and 100 mm.
- the LRF fixed and mobile LRM refractory beams according to the invention have, transversely, an inclined and rounded profile on the upper part on which the pins are positioned.
- the inclined profile is determined with an angle greater than the angle of sloping, facilitating the crushing and the evacuation of the scale in the passage E provided for this purpose between the fixed refractory beams and the mobile refractory beams LRM.
- the angle of the inclined profile is for example greater than 45 °.
- the seal between the hearth, formed by the fixed and movable refractory beams, and the mechanical under oven consisting of the lifting frame and the translation frame, is obtained by longitudinal water tanks 40 ( Figure 3 and 5) integral with the side members fixed refractories and metal skirts 70 integral with the movable and plunging refractory beams in the water tanks 40.
- the water tanks 40 are fixed on each side of the fixed refractory beams LRF.
- the skirts 70 are fixed on each side of the mobile refractory beams LRM.
- the profile of the skirts 70 makes it possible to avoid the direct radiation of the atmosphere of the laboratory of the oven on the surface of the water contained in the water tanks 40 in order to minimize the heat losses through the openings and the consumption of 'water.
- the water tanks 40 are no longer crossed by the movable pins 10Q.
- the length of the movable keels is reduced compared to that according to the prior art, of the order of one meter and fifty centimeters.
- the mobile refractory beams can have three vertical positions relative to the fixed refractory beams, respectively low (on the left of the figure), intermediate (in the center of the figure), and high (on the right of the figure).
- the keel passage according to the prior art was surrounded by fibrous material which, when torn off, led to oxidation. This is no longer the case with the solution according to the invention in which the keel 12Q is embedded in the refractory of the mobile refractory beam LRM. Keel lining solutions had been sought, for example by means of stainless steel sheets, but the latter heated, deformed and did not hold.
- the movable skirts 70 are equipped with a plurality of squeegees 50 fixed on the metal skirts 70.
- the squeegees 50 immerse in the water tanks 40 and allow the routing of the scale to recovery hoppers (not shown), placed at the end of the tanks, by the relative movement between the water tanks and the squeegees obtained by the association of the rectangular displacement of the squeegees 50 and the fixed position of the water tanks 40.
- the metal scrapers 50 push the quantity of scale located in the bottom of the water tanks 40 between two scrapers with a translation pitch towards the end of the water tanks 40.
- the squeegees help to crush the scale, which facilitates its evacuation in the water tank 40.
- the squeegees thus have a suitable profile to favor the crushing and the evacuation of the scale, for example in the form of a spade.
- the end of the water tank 40 is fitted with a diaphragm valve 20 (FIG. 3), acting as a flush 20, which discharges the scale through the troughs 21 in the wagons on wheels 23, l evacuation is in the direction of exit from the oven towards the entrance of the oven.
- a diaphragm valve 20 (FIG. 3), acting as a flush 20, which discharges the scale through the troughs 21 in the wagons on wheels 23, l evacuation is in the direction of exit from the oven towards the entrance of the oven.
- the skirts 70 are not equipped with squeegees.
- the scale can be removed from the water tanks 40 onto which it falls by a device external to the oven, for example by lances of the fire hose type.
- the water tanks 40 can be provided with nozzles (80) for spraying water (FIG. 3), disposed at the level of the discharge, which push the scale towards the end of the tank 40 located on the side of the oven.
- the water tanks 40 can be provided with water injection 80, for example spray nozzles, which, under pressure, drives the scale towards the flushes 20.
- skirts 70 can also be fitted with squeegees to improve the crushing of the scale.
- a third variant of this first embodiment only described for its differences from the first embodiment and possibly combinable with the first variant, it is possible to provide two or three intermediate evacuation points for the scale.
- Each of the transverse trays can advantageously be placed between two wheels 33.
- This second variant is particularly advantageous in the context of a very long oven.
- the water tanks can also be fixed to the LRM mobile refractory beams. In this case, it is necessary to take into account the wave effect at the end of the water tank generated by the displacement of the side members.
- FIGS. 7 to 9 schematically show a second embodiment of an FFF oven according to the invention.
- the FFF oven is only described for its differences from the first embodiment, and could take up the characteristics of one or more of the variants of the first embodiment.
- the oven has a longitudinal part P2 similar to that described according to the prior art, from the oven to a longitudinal position from which part begins. PI similar to that as described with reference to the first embodiment of the invention.
- the refractory beams can also be offset transversely towards the outlet of the oven, as can be seen in FIG. 8.
- the oven comprising refractory beams LRF, LRM over only part of its length
- at least one water tank 40 has a rectangular or U shape, at least one transverse section 41 of the water tank ensuring a connection between two longitudinal sections 42 of the water tank arranged on either side of a fixed refractory beam.
- FIG 11 illustrates an exemplary embodiment of a water tank 40 according to the invention, in the case shown in Figures 3 and 4 where the water tank is the entire length of the oven, with a top view of the water tank on the left side of the figure and a cross-sectional view thereof on the right side of the figure.
- the rectangular water tank comprises two longitudinal parts 42 arranged on either side of a fixed refractory beam, not shown, and two transverse connections 41 between these longitudinal parts arranged on either side of the refractory beam, at each end of the longitudinal parts.
- skirts 70 plunge into the water tank along the longitudinal parts 42 and transverse connections 41, thus ensuring continuity of the joint. hydraulic.
- the water tank has two flushes 20, located on the transverse link 41 located on the side of the furnace charging, one for each longitudinal part of the water tank, and spray nozzles of water 80 represented by arrows.
- FIG 12 illustrates another embodiment of a water tank 40 according to the invention, in the case shown in Figures 7 and 8 where the refractory beams according to the invention are only on a part of the oven, in this case in the oven, with a top view of the water tank on the left part of the figure and a cross-sectional view of it on the right part of the figure.
- the rectangular water tank also comprises two longitudinal parts 42 arranged on either side of a fixed refractory beam, not shown, and two transverse connections 41 between these longitudinal parts arranged on either side of the refractory beam , at each end of the longitudinal parts.
- the water tank has a flush 20 disposed on each longitudinal part of the water tank, and water spray nozzles 80 represented by arrows.
- FIG. 10 illustrates a variant of the exemplary embodiment represented in FIG. 8 in which the transverse offset of the side members to limit the black traces caused by the shadow of the andirons on the products is produced on the PI part of the oven, in this example about half of its length.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1874133A FR3090836B1 (fr) | 2018-12-24 | 2018-12-24 | « Four à longerons mobiles permettant de broyer et d’évacuer en continue la calamine» |
PCT/FR2019/053126 WO2020136321A1 (fr) | 2018-12-24 | 2019-12-17 | Four à longerons mobiles permettant de broyer et d'évacuer en continue la calamine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3903057A1 true EP3903057A1 (fr) | 2021-11-03 |
EP3903057B1 EP3903057B1 (fr) | 2022-10-19 |
Family
ID=66530320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19845707.9A Active EP3903057B1 (fr) | 2018-12-24 | 2019-12-17 | Four à longerons mobiles permettant de broyer et d'évacuer en continue la calamine |
Country Status (10)
Country | Link |
---|---|
US (1) | US20220074665A1 (fr) |
EP (1) | EP3903057B1 (fr) |
BR (1) | BR112021011695A2 (fr) |
CA (1) | CA3122609A1 (fr) |
ES (1) | ES2935359T3 (fr) |
FI (1) | FI3903057T3 (fr) |
FR (1) | FR3090836B1 (fr) |
MX (1) | MX2021007697A (fr) |
PL (1) | PL3903057T3 (fr) |
WO (1) | WO2020136321A1 (fr) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB813362A (en) * | 1956-03-19 | 1959-05-13 | Svenska Metallverkens Ugns Akt | Improvements in and relating to walking beam conveyors for furnaces |
DE1133414B (de) * | 1956-03-19 | 1962-07-19 | Svenska Metallverkens Ugns Akt | Vorrichtung zum Abdichten an industriellen Waermoefen, vorzugsweise zur Behandlung von Stahl-bloecken od. dgl. mit Hubbalkenfoerdereinrichtung |
DE1508375B2 (de) * | 1966-07-22 | 1971-09-02 | Fa Beck & Kaltheuner, 5970 Plet tenberg | Hubbalkenofenherd |
DE2017106A1 (en) * | 1970-04-10 | 1971-10-21 | Koppers Wistra Ofenbau Gmbh | Under - fired walking beam furnace |
DE4119708A1 (de) * | 1991-06-14 | 1992-12-17 | Maerz Ofenbau | Gleichschrittofen fuer die waermebehandlung von stueckigem gut |
FR2954353B1 (fr) | 2009-12-23 | 2012-01-13 | Fives Stein | Four de rechauffage a longerons mobiles agence pour un evacuation de la calamine |
-
2018
- 2018-12-24 FR FR1874133A patent/FR3090836B1/fr active Active
-
2019
- 2019-12-17 FI FIEP19845707.9T patent/FI3903057T3/fr active
- 2019-12-17 US US17/417,886 patent/US20220074665A1/en not_active Abandoned
- 2019-12-17 CA CA3122609A patent/CA3122609A1/fr active Pending
- 2019-12-17 ES ES19845707T patent/ES2935359T3/es active Active
- 2019-12-17 WO PCT/FR2019/053126 patent/WO2020136321A1/fr unknown
- 2019-12-17 EP EP19845707.9A patent/EP3903057B1/fr active Active
- 2019-12-17 MX MX2021007697A patent/MX2021007697A/es unknown
- 2019-12-17 BR BR112021011695-8A patent/BR112021011695A2/pt unknown
- 2019-12-17 PL PL19845707.9T patent/PL3903057T3/pl unknown
Also Published As
Publication number | Publication date |
---|---|
CA3122609A1 (fr) | 2020-07-02 |
WO2020136321A1 (fr) | 2020-07-02 |
FR3090836B1 (fr) | 2021-04-16 |
PL3903057T3 (pl) | 2023-01-30 |
BR112021011695A2 (pt) | 2021-09-08 |
FI3903057T3 (en) | 2023-01-13 |
ES2935359T3 (es) | 2023-03-06 |
EP3903057B1 (fr) | 2022-10-19 |
FR3090836A1 (fr) | 2020-06-26 |
MX2021007697A (es) | 2021-08-05 |
US20220074665A1 (en) | 2022-03-10 |
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