WO2024256461A1 - Trockengranulator zur trockengranulierung von schmelzflüssigem material, insbesondere schlacke - Google Patents
Trockengranulator zur trockengranulierung von schmelzflüssigem material, insbesondere schlacke Download PDFInfo
- Publication number
- WO2024256461A1 WO2024256461A1 PCT/EP2024/066229 EP2024066229W WO2024256461A1 WO 2024256461 A1 WO2024256461 A1 WO 2024256461A1 EP 2024066229 W EP2024066229 W EP 2024066229W WO 2024256461 A1 WO2024256461 A1 WO 2024256461A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wall
- edge
- inclusive
- rotation
- atomizer
- 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.)
- Ceased
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/052—Apparatus features including rotating parts
- C21B2400/054—Disc-shaped or conical parts for cooling, dispersing or atomising of molten slag rotating along vertical axis
Definitions
- the invention relates to a dry granulator for dry granulation of molten material according to patent claim 1.
- a wet granulator for granulating slag and recovering waste heat is known from CN 108 998 604 A.
- the wet granulator has a granulating unit with a rotating slag pan.
- the slag pan has a large number of channels arranged in a star shape, which extend from radially inwards to radially outwards.
- the slag hitting the slag pan is conveyed radially outwards through the channels and is essentially spun off radially outwards from the slag pan in one plane.
- the liquid slag flies radially outwards and falls downwards along a trajectory.
- the granulated slag is guided past an atomizer nozzle.
- the atomizer nozzle sprays atomized water onto the slag.
- a granulator with an essentially flat atomizer disk is known.
- the atomizer disk is made of a metallic material. Furthermore, the granulate is cooled using water.
- WO 2011/124455 A1 discloses a device for producing granules from a mineral melt, with a melt feed device and a rotary atomization device with a rotatably arranged rotating body, on the surface of which the melt is atomized into microparticles and the microparticles thus created take a trajectory away from the rotating body. Furthermore, a cooled impact wall is provided which limits the trajectory of the microparticles and on which the microparticles are reflected. Depending on the speed of the rotating body, the mineral melt is sprayed from the rotating body along a trajectory.
- CN 112501366 A discloses a molten slag double-layer centrifugal granulation device with an air quenching for a slag melt.
- the double-layer centrifugal granulation device has a rotating upper layer pot, a rotating lower layer pot and a motor. Edges of the rotating upper layer pot and the rotating lower layer pot are provided with saw teeth. The saw teeth are designed to break up a layer of the molten slag.
- a strongly toothed turntable for a wet granulator is known from CN 106 755 664 A.
- Dry granulation of molten material is a technology currently being developed to process molten material into solid granules.
- Molten material is, for example, molten metal or metallurgical slag, for example molten blast furnace slag - the process is then also called dry slag granulation DSG and is described, for example, in EP 2 747 920 B1. Dry in this context means that the molten material does not come into direct contact with liquid water during granulation - this is, for example, in contrast to conventional industrial processes for granulating blast furnace slag, in which the molten slag is introduced into a water stream.
- the granulator is a container delimited by a casing, which has a slag feed, a gas feed for process gas used for cooling and an exhaust line for heated process gas - for example air, also called process air.
- the molten material for example molten metallurgical slag
- an atomization unit located in the casing of the granulator; this is, for example, a rapidly rotating unit known as a rotary atomizer; something like this is shown, for example, in EP 2 747 920 B1.
- the accelerations or forces transmitted when the molten slag comes into contact with the rotary atomizer break the molten material into fine droplets and hurl them outwards.
- the dry granulator has a housing and an atomizer arranged in the housing with an atomizer element mounted so as to be rotatable about an axis of rotation.
- the housing has a first housing inner wall with a first housing inner wall section and a second housing inner wall section.
- the second housing inner wall section is arranged axially offset from the first housing inner wall section along the axis of rotation.
- the atomizer element has a wall and a base. The wall is designed to run all the way around in the circumferential direction with respect to the axis of rotation and extends radially on the outside adjacent to the base.
- the wall On an axial side facing away from the base in the axial direction, the wall has an edge arranged at an axial distance from the base.
- the edge is designed to run at a different distance from the base between a first high point and a first low point, varying at a different distance.
- the edge is arranged closer to the base at the first low point than at the first high point.
- the edge has a predefined first number of high points and a predefined second number of low points, the first number being from 1 to 5 inclusive and/or the second number being from 1 to 5 inclusive.
- the edge is formed between the first high point and the first low point, molten material from the atomizer element in the direction of the first and the second housing inner wall section along different trajectories.
- This design has the advantage that the molten granulate flies in a distributed manner in the direction of the first housing inner wall section, thus preventing the molten material from concentrating on the first housing inner wall in the region of a narrow band. In particular, adhesions of the molten material that is thrown radially outwards by the atomizer element can be avoided.
- the small number of high points and/or low points ensures that uniform spraying behavior is ensured across the edge. This prevents local accumulations of molten material both on the atomizer element and on the inner wall of the housing.
- the number of high points and low points mentioned which are preferably distributed at regular intervals in the circumferential direction, prevents accumulation in the area of the low point and thinning or even penetration of the molten material in the area of the high point. This essentially ensures a constant layer thickness of molten material at the edge when the atomizer element rotates. This further improves the distribution of the molten material.
- this design can ensure that the front side is completely covered radially on the inside of an outer edge of the atomizer element. This can prevent local oxidation of the atomizer element heated to 1500 °C, in particular of a graphite portion of the atomizer element.
- the edge can spray a first part of the molten material from the atomizer element in the direction of the first housing wall inner section along a first trajectory.
- the edge can spray a second part of the molten material from the atomizer element in the direction of the second housing wall inner section along a second trajectory.
- the first trajectory can run offset in the axial direction to the second trajectory, thereby avoiding the concentration of the molten material on the first housing inner wall.
- the edge can also spray a further part of the molten material along a further trajectory in the circumferential direction between the first high point and the first low point. that runs axially between the first trajectory and the second trajectory.
- the small number of high points and/or low points also ensures that approximately a similar amount of molten material is sprayed at both the first high point and the first low point.
- the wall is blunt at the edge and faces away from the base, with the edge extending in a ring shape with a radial width around the axis of rotation. Due to the continuous design, an inner edge of the edge is always radially spaced from the outer edge. The blunt design also prevents local penetration, for example at the high point, in the case of a thin layer of molten material. This makes the atomizer element particularly wear-resistant.
- the edge is arranged at an angle at a second angle to a plane of rotation perpendicular to the axis of rotation, wherein the edge is arranged at an angle inwards towards the axis of rotation, so that as the distance of the edge from the axis of rotation increases, a third maximum distance of the edge from the bottom increases.
- the edge is designed to run continuously and in a differentiable manner in the circumferential direction over the first high point and/or the first low point. This avoids sharp edges or corners radially on the inside of the outer edge, at which the molten material would be inadvertently separated. Furthermore, wear of the atomizer element is thereby minimized at the high point and the low point.
- the dry granulator has a granulate storage with a fluidized bed.
- the granulate storage is arranged in the radial direction between the housing and the atomizer element.
- the fluidized bed has a first storage section and a second storage section.
- the first storage section is arranged radially offset on the inside to the second storage section.
- the first housing inner wall section is aligned obliquely to the axis of rotation in order to deflect the first part of the molten material striking the first housing inner wall section in the direction of the first storage section.
- the second housing inner wall section is aligned obliquely to the axis of rotation in order to deflect the second part of the molten material striking the second housing inner wall section in the direction of the second storage section.
- This design has the advantage that the first and second parts of the molten material fall into the granulate storage spaced apart in the radial direction and are cooled there by the air flow flowing in via the fluidized bed and by the granulate already present in the granulate storage.
- the distribution of the molten material over the first and second housing inner wall sections in the granulate storage can also prevent parts of the molten material, in particular several drops, from sticking to one another in the granulate storage, so that on the one hand the drops of the molten material in the granulate storage are quickly cooled to granulate and on the other hand the granulate has essentially a uniform granulate size.
- the first inner housing wall is arranged at a wall angle of 30° to 60° inclusive, in particular 40° to 50° inclusive, to a plane of rotation inclined inwards to the axis of rotation. This design ensures that the molten material impacting on the first inner housing wall is well distributed in the granulate reservoir.
- the wall of the atomizer element is divided in the circumferential direction relative to the axis of rotation into at least one first wall section and at least one second wall section.
- the second wall section adjoins the first wall section in the circumferential direction.
- the edge extends on the first wall section between the first high point and a first low point, which is arranged offset in the circumferential direction from the first high point.
- On the second wall section the edge extends from the first low point in the circumferential direction away from the first wall section.
- the edge is designed to run at an angle to a plane of rotation on the first wall section and on the second wall section to the axis of rotation.
- the edge is designed on both the first wall section and the second wall section to spray the molten material from the atomizer element in the direction of the first housing inner wall. This design ensures that the atomizer element is essentially completely covered on the top with the molten material, thereby preventing corrosion, in particular oxidation, of the atomizer element.
- the atomizer element has a cone element.
- the cone element is arranged on the bottom on the side facing the wall and centered on the axis of rotation.
- the cone element extends along the axis of rotation away from the bottom.
- a tip of the cone element, which is on a side facing away from the bottom Side of the cone element projects beyond the first low point in the axial direction.
- the tip of the cone element is arranged axially between the first high point and the first low point.
- the atomizer element has a maximum radial total extension in the radial direction.
- the cone element has a first maximum radial extension at the bottom.
- a first ratio of the first maximum radial total extension to the maximum radial total extension is preferably 0.05 to 0.4 inclusive, in particular 0.1 to 0.25 inclusive. This design ensures that the material requirement for the cone element can be kept low and thus the manufacturing effort for producing the atomizer element can be kept low.
- the atomizer element has a maximum total radial extent in the radial direction.
- the first high point has a first maximum distance from the bottom.
- a fourth ratio of the first maximum distance to the maximum total radial extent is in a range from 0.1 to 1 inclusive, preferably in a range from 0.15 to 0.3 inclusive.
- the atomizer element has a maximum total radial extent in the radial direction, wherein the first low point has a first minimum distance from the bottom.
- a fifth ratio of the first minimum distance to the maximum total radial extent is in a range from 0.05 to 0.95 inclusive, preferably in a range from 0.05 to 0.3 inclusive, in particular 0.08 to 0.2 inclusive. This ensures that the first low point is always arranged above the bottom. This ensures reliable coverage of the bottom by damming up the molten material through the wall. In particular, this avoids areas of the bottom being exposed and not covered by the molten material. This reduces unwanted oxidation of the atomizer element.
- a sixth ratio of a difference between the first maximum distance and the first minimum distance to the maximum total radial extent is in a range from 0.05 to 0.1 inclusive.
- the wall has a radially inner wall side and a radially outer peripheral side.
- the wall extends in the radial direction between the wall inner side and the outer peripheral side from the base in the axial direction towards the edge.
- Radially on the outside, the base has a second maximum radial extent.
- the wall has a minimum radial wall extent at the edge.
- a second ratio of the maximum total radial extent to the second maximum radial extent is 1.2 to 1.9 inclusive, in particular 1.4 to 1.7 inclusive.
- a third ratio of the maximum total radial extent to the minimum radial wall extent is 1.1 to 1.5 inclusive, in particular 1.2 to 1.35 inclusive.
- This design has the advantage that the wall is sufficiently wide so that in the event of oxidation of the outer peripheral side, which leads to material removal on the outer peripheral side and thus to a wall that becomes thinner from radially outside to radially inside with increasing operating time of the atomizer element, a long service life of the atomizer element is nevertheless ensured.
- the atomizer has a drive device with a holder and a protective gas channel.
- the atomizer element engages in the holder with a first section and is positively connected to the drive device for torque transmission.
- the atomizer element protrudes with a second section over the drive device, wherein the protective gas channel is guided in the drive device and opens into the holder on one side.
- a protective gas can be guided via the protective gas channel to act on the second section of the atomizer element.
- the protective gas applies protective gas to the second section, which is not arranged in the holder.
- the protective gas can be nitrogen, for example.
- the protective gas reduces oxidation of the outer peripheral side, so that the service life of the atomizer element can be further increased.
- the atomizer element is made predominantly, in particular at least 80 percent by mass, from a carbon-based material, preferably graphite.
- This design has the advantage that adhesions to the atomizer element by molten material can be avoided.
- the edge has only two or three or four high points and/or two or three or four low points.
- the small number of high points and/or low points has the advantage that the edge has a lower inclination in the circumferential direction to the plane of rotation and it is therefore reliably ensured that the molten material between the high point and the low point is also thrown off over the edge between the high point and the low point. This ensures complete wetting of the atomizer element on the upper side, so that oxidation of the atomizer element can be avoided, particularly when graphite is used for the atomizer element.
- the predefined first number of high points is less than or equal to 1 per 0.5 m circumference at the edge. Additionally or alternatively, the predefined second number of low points is also less than or equal to 1 per 0.5 m circumference at the edge. This design ensures that there is sufficient distance between a high point and a low point and thus in particular a large gradient of the edge in the circumferential direction to a plane of rotation between the high point and the low point is avoided.
- an amount of the first slope and/or the amount of the second slope is in a range from 0° to 6° inclusive.
- the first slope and/or the second slope is related to a plane of rotation perpendicular to the axis of rotation.
- the amount of the first slope and/or the amount of the second slope can be in a range from 0° to 5.7° inclusive. If the first slope and/or the second slope is constant in sections, for example over a range of 70% to 90% inclusive between the high point and the low point, the amount of the first slope and/or the amount of the second slope is preferably in a range from 0° to 3.6° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 12° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 11.3° inclusive. If the first gradient and/or the second gradient is constant in sections, for example over a range of 70% to 90% between the high point and the low point, the amount of the first gradient and/or the amount of the second gradient is preferably in a range of 0° to 7.3°.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 17° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 16.7° inclusive. If the first gradient and/or the second gradient is constant in sections, for example over a range of 70% to 90% inclusive between the high point and the low point, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 10.8° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 22° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 21.8° inclusive. If the first gradient and/or the second gradient is constant in sections, for example over a range of 70% to 90% inclusive between the high point and the low point, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 14.3° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 27° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 26.6° inclusive. If the first gradient and/or the second gradient is in sections, for example over a range from 70% to 90% inclusive between the high point and the low point, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 17.7° inclusive.
- FIG 1 is a schematic sectional view through a dry granulator
- FIG 2 shows a perspective section of the dry granulator
- FIG 3 is a sectional view along a section plane A-A shown in FIG 2 through the atomizer.
- FIG 4 is a sectional view along a sectional plane B-B shown in FIG 2 through the atomizer shown in FIG 1.
- FIG 1 shows a schematic sectional view through a dry granulator 10.
- the dry granulator 10 is designed for the dry granulation of molten material 35, in particular molten slag from a metallurgical process, for example a blast furnace process.
- the dry granulator 10 has a housing 15, an atomizer 20, a granulate storage 25 and a feed 30 for feeding the molten material 35.
- the housing 15 delimits a housing interior 40, wherein the housing 15 extends essentially in the circumferential direction around a rotation axis 45 of the atomizer 20.
- the feed line 30 is guided through the housing 15 and opens into the housing interior 40 on one side adjacent to the atomizer 20.
- the feed line 30 can be guided on the rotation axis 45 at least in sections and/or open into the housing interior 40 on the rotation axis 45.
- the atomizer 20 extends along the rotation axis 45 and has a drive device 50, an atomizer element 55 and an atomizer housing 60.
- the atomizer element 55 is mounted so as to be rotatable about the rotation axis 45 and is also connected in a rotationally fixed manner to the drive device 50.
- the drive device 50 can have a drive motor (not shown) which is designed to drive the atomizer element 55 and to rotate it about the rotation axis 45 during operation of the dry granulator 10.
- the drive motor can be arranged outside the housing interior 40 in order to prevent thermal overloading of the drive motor.
- the drive motor can be connected to the drive motor in a torque-locking manner, preferably in a rotationally locked manner, for example by means of a shaft 65.
- the shaft 65 can be rotatably mounted in the atomizer housing 60.
- the atomizer element 55 has, for example, graphite as the predominant material.
- predominantly means that at least 50 percent by mass, preferably at least 80 percent by mass, is made of a carbon-based material.
- the carbon-based material can in particular be graphite.
- the housing 15 has at least one first housing inner wall 70 and at least one second housing inner wall 75.
- the housing 15 can have a housing cover 80, preferably arranged on the top, wherein, for example, a discharge opening 85 is arranged in the housing cover 80.
- the second housing wall 75 can be arranged adjacent to the first housing wall 70.
- the discharge opening 85 can be arranged at a different position on the housing 15, for example on the first and/or second housing inner wall 70, 75.
- the second housing inner wall 75 can extend essentially cylindrically around the axis of rotation 45.
- the granulate storage 25 can be arranged in the radial direction between the second housing inner wall 75 and the atomizer housing 60.
- the first housing inner wall 70 adjoins the second housing inner wall 75.
- the first housing inner wall 70 is arranged inclined obliquely inwards in the direction of the axis of rotation 45.
- the first housing inner wall 70 can be designed to be essentially partially conical.
- the housing interior 40 tapers from the granulate storage 25 in the direction of the discharge opening 85 along the axis of rotation 45 in the axial direction.
- the first housing inner wall 70 is arranged at a wall angle ö to a rotation plane 76 perpendicular to the rotation axis 45.
- the wall angle ö can have a value of 30° to 60° inclusive, in particular 40° to 50° inclusive.
- the first housing inner wall 70 is arranged at the wall angle ö of 45° to the rotation plane.
- the first housing inner wall 70 is preferably smooth. In this case, smooth means that the first housing inner wall 70 essentially has no elevations (> 0.2 mm), in particular no kinks, compressions, bumps or the like.
- the granulate storage device 25 is delimited, for example, by the second housing inner wall 75 arranged in the axial direction on the underside of the first housing inner wall 70.
- the atomizer element 55 is arranged essentially at the level of the first housing inner wall 70.
- the first housing inner wall 70 and the atomizer element 55 have an axial overlap.
- an axial overlap is understood to mean that when two components are projected in a radial direction perpendicular to the axis of rotation 45 into a projection plane in which the axis of rotation 45 runs, the two components, for example the atomizer element 55 and the first housing inner wall 70, overlap.
- the granulate storage device 25 has a fluidized bed 90 and a compressor 95.
- the compressor 95 is fluidically connected to the fluidized bed 90.
- the fluidized bed 90 is connected to the housing interior 40 on the underside.
- the fluidized bed 90 has a distributor base 100, wherein the distributor base 100 is fluidically connected to the compressor 95 on the outside.
- the distributor base 100 is arranged on the circumference between the atomizer housing 60 and the second housing inner wall 75.
- FIG 2 shows a perspective section of the dry granulator 10.
- the atomizer element 55 is bowl-shaped.
- the atomizer element 55 has at least one base 110 and a wall 115 that adjoins the base 110 on the radial outside.
- the wall 115 is arranged on the radial outside of the base 110 and extends away from the base 110 in the axial direction relative to the axis of rotation 45. Together, the base 110 and the wall 115 delimit an atomizer interior 120.
- the wall 115 is designed to completely encircle the axis of rotation 45 in the circumferential direction and encloses the base 110 on the radial outside. As a result, the atomizer interior 120 is completely enclosed in the radial direction.
- the wall 115 has an edge 125 on the side facing away from the base 110.
- the edge 125 is arranged completely spaced apart from the base 110 in the axial direction.
- the edge 125 is completely circumferentially attached to the wall around the axis of rotation 45.
- the wall 115 is blunt at the edge 125. Radially on the outside, the edge 125 abuts an outer peripheral side 135 of the atomizer element 55 at an outer edge 130.
- a first section 140 of the wall 115 adjoining the outer edge 130 can be cylindrical and extend around the axis of rotation 45.
- the edge 125 varies in an edge distance between the base 110 and the edge 125 between at least a first high point 185 and a first low point 190.
- the edge distance is maximum, while at the first low point 190, the edge distance is minimum.
- the first low point 190 is arranged offset in the circumferential direction from the first high point 185.
- the edge 125 additionally has a second high point 195 and a second low point 200, which are arranged offset from one another and from the first high point 185 and the first low point 190.
- the high point 185, 195 and the low point 190, 200 are arranged offset in the circumferential direction around the axis of rotation.
- the edge 125 runs between the high point 185, 195 and the nearest low point 190, 200 at an angle in the circumferential direction to a rotation plane perpendicular to the rotation axis 45.
- first number of high points 185, 195 and a second number of low points 190, 200 are limited. It is advantageous if the first number is from 1 to 5 inclusive and the second number is from 1 to 5 inclusive. It is even more advantageous if the edge 125 has only two high points 185, 195 or three high points 185, 195 or four high points 185, 195 and/or two low points 190, 200 or three low points 190, 200 or four low points 190, 200.
- the edge 125 has an alternating course, for example, with an inflection point of the course of the edge 125 being arranged at the high point 185, 195 and/or the low point 190, 200.
- the shape of the edge 125 in the circumferential direction can be determined using a mathematical function.
- the shape of the edge 125 in the circumferential direction can be determined using a polynomial and/or a sine function.
- the course of the edge can be approximated to a jagged course or a wave-shaped course or can be designed accordingly.
- the edge 125 is completely continuous and preferably differentiable in its course in the circumferential direction.
- the high point 185, 195 and/or the low point 190, 200 is rounded in order to ensure continuity and differentiability.
- the rounding at the high point 185, 195 and/or in the low point 190, 200 is preferably designed in such a way that reliable wetting of the edge 125 with molten material 35 is ensured at the high point 185, 195 and/or in the low point 190, 200 and in particular penetration of the molten material 35 on the atomizer element 35 at the high point 185, 195 and/or a strong accumulation of molten material 35 in the region of the low point 190, 200 is avoided.
- the edge 125 is wave-shaped, in particular in the manner of a uniform wave, or is approximated to a jagged triangular shape.
- the edge 125 could also be sinusoidal.
- edge 125 It is essential in the design of the edge 125 that jumps, in particular flanks extending in the axial direction parallel to the axis of rotation 45 in the edge 125 or sharp edges and/or points in the high point 185, 195 and/or in the low point are dispensed with.
- the wall 115 is divided into wall sections 155, 160, 205, 210.
- a first wall section 155 extends, for example, between the first high point 185 and the first low point 190.
- the edge 125 is designed to run continuously.
- the wall 115 can have a first slope at the first wall section 155.
- the edge 125 in the first wall section 155 slopes down from the first high point 185, which is arranged further away from the floor 110 than the first low point 190, in the direction of the first low point 190.
- the first gradient of the first wall section 155 can be constant over a range of 70% to 90% of the first wall section 155, in particular with the jagged course of the edge 125.
- the edge 125 is rounded so that the amount of the first gradient is reduced in the remaining area and has the value zero in the first high point 185 and in the first low point 190.
- a second wall section 160 adjoins the first wall section 155 in the circumferential direction directly.
- the second wall section 160 extends in the circumferential direction between the first low point 190 and the closest second high point 195, which is arranged on a side facing away from the first high point 185 in the circumferential direction.
- the edge 125 can be formed continuously and in a differentiable manner. This can be done, for example, by rounding the edge 125 in the first low point 190.
- the second wall section 160 rises from the first low point 190 to the second high point 195.
- the edge 125 has, for example, a second slope.
- the second slope of the second wall section 160 can be constant, for example, over a range of 70% to 90% of the second wall section 160.
- An amount of the first slope can correspond to an amount of the second slope.
- the edge 125 is rounded so that the amount of the second gradient is reduced in the remaining area and has the value zero in the second high point 195 and in the first low point 190.
- a third wall section 205 adjoins the second high point 195.
- the third wall section 205 extends in the circumferential direction between the second high point 195 and the second low point 200 arranged in the circumferential direction on the side facing away from the first low point 190.
- the third wall section 205 can be designed essentially identically to the first wall section 155.
- the fourth wall section 210 adjoins the second low point 200, with the fourth wall section 210 extending in the circumferential direction between the second low point 200 and the first high point 185.
- the fourth wall section 210 is thus arranged, for example, in the circumferential direction between the third wall section 205 and the first wall section 155.
- the fourth wall section 210 can be designed identically to the second wall section 160.
- the fourth wall section 210 abuts the first wall section 155 on the side facing away from the third wall section 205.
- the edge 125 is also formed continuously and preferably in a differentiable manner.
- the edge 125 at the first high point 185 can be rounded.
- the edge 125 is guided continuously and preferably in a differentiable manner at alternating distances from the ground over the high points 185, 195 and low points 190, 200.
- the amount of the first gradient and/or the amount of the second slope is in a range from 0° to 6° inclusive.
- the first slope and/or the second slope is related to a plane of rotation perpendicular to the axis of rotation 45.
- the amount of the first slope and/or the amount of the second slope can be in a range from 0° to 5.7° inclusive. If the first slope and/or the second slope is constant over the range as described above, the amount of the first slope and/or the amount of the second slope is preferably in a range from 0° to 3.6° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 12° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 11.3° inclusive. If the first gradient and/or the second gradient is constant over the range as described above, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 7.3° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 17° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 16.7° inclusive. If the first gradient and/or the second gradient is constant over the range as described above, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 10.8° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 22° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 21.8° inclusive. If the first gradient and/or the second gradient is constant over the range as described above, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 14.3° inclusive.
- the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 27° inclusive.
- the amount of the first gradient and/or the amount of the second gradient can be in a range from 0° to 26.6° inclusive. If the first gradient and/or the second gradient is constant over the range as described above, the amount of the first gradient and/or the amount of the second gradient is preferably in a range from 0° to 17.7° inclusive.
- FIG 3 shows a sectional view along a cutting plane A-A shown in FIG 2 through the atomizer 20.
- the cutting plane A-A extends through the two low points 190, 200.
- the atomizer element 55 can have a cone element 215.
- the cone element 215 is arranged at a fixed end 220 on the base 110 and extends away from a bottom 145 of the atomizer element 55.
- the cone element 215 is arranged centered on the axis of rotation 45 and extends away from the base 110.
- the bottom 145 is arranged on an axial side facing away from the base with respect to the axis of rotation 45.
- the cone element 215 tapers from the fixed end 220 towards a tip 225.
- the tip 225 is arranged in the axial direction with respect to the axis of rotation 45 between the first low point 190 and the first high point 185.
- the tip 225 projects beyond the edge 125 at least at the first low point 190 and/or the second low point 200. Furthermore, the tip 225 is preferably projected beyond at least the edge 125 at the first high point 185 and/or the second high point 195.
- the mouth 230 of the feed 30 is arranged in the axial direction opposite the tip 225.
- the mouth 230 is also preferably arranged centered to the axis of rotation 45, wherein the feed 30 is preferably arranged centered along the axis of rotation 45 at least in the section adjacent to the mouth 230.
- the atomizer element 55 has a maximum total radial extension R in the radial direction.
- the maximum total radial extension R refers, for example, on the outer edge 130 at the edge 125.
- the outer peripheral side 135 is designed, for example, to be cylindrical and extending around the axis of rotation 45, so that the maximum radial total extent R also relates to the outer peripheral side 135.
- the cone element 215 has a first maximum radial extent d1.
- a first ratio d 1 / of the first radial total extent d1 to that of the maximum radial total extent R is 0.05 to 0.4 inclusive, in particular 0.1 to 0.25 inclusive, particularly advantageously 0.15 to 0.2 inclusive.
- the base 110 Radially on the outside of the cone element 215, the base 110 has a base surface 235 which is designed to be flat, for example.
- the base surface 235 extends, for example, perpendicular to the axis of rotation 45.
- the base surface 235 is designed to run in a ring around the cone element 215.
- the cone element 215 is rounded at a first transition 236 between the base surface 235 and the cone element 215 in order to ensure a smooth and continuous transition between the cone element 215 and the base surface 235. This also prevents the molten material 35 from sticking.
- the wall 115 adjoins the base surface 235 radially on the outside.
- the base 110 has a second maximum radial extent d2 on the base surface 235, wherein a second ratio R/d2 of the maximum total radial extent R to the second maximum radial extent is preferably 1.2 to 1.9 inclusive, in particular 1.4 to 1.7 inclusive.
- the wall 115 is rounded at a second transition 237 between the base surface 235 and the wall 115 in order to ensure adhesion of the molten material 35 through a smooth and continuous transition.
- the second maximum extent d2 can be determined, for example, at an intersection point of a straight line that runs tangentially to the wall 115 and a plane in which the base surface 235 runs.
- the wall 115 is wider in the radial direction on the side facing the base 110 than at the edge 125. In other words, the wall 115 tapers in the axial direction from the base 110 to the edge 125. Radially on the inside of the edge 125, the wall 115 has a minimum radial wall extension w2 that is greater than the second maximum radial extension d2. At a third transition 238 between the wall inner side 240 and the edge 125, the wall 115 is rounded so that adhesion of the molten material 35 is ensured by a smooth and continuous transition. At the third transition 238, the edge 125 the minimum wall extension w2.
- a third ratio R/w2 of the maximum total radial extension R to the minimum radial wall extension w2 is preferably 1.1 to 1.5 inclusive, in particular 1.2 to 1.35 inclusive.
- the wall 115 primarily forms the bowl-shaped configuration of the atomizer element 55.
- the wall 115 has the inner wall side 240 arranged radially on the inside, the inner wall side 240 being curved and the second transition 237 between the bottom surface 235 and the inner wall side 240 being continuous.
- the inner wall side 240 runs, for example, at an angle to the bottom surface 235, which runs, for example, perpendicular to the axis of rotation 45.
- the inner wall side 240 can be arranged, for example, at an angle to the bottom surface 235.
- the first angle a is preferably 15° to 60° inclusive, in particular 30° to 40° inclusive, particularly advantageously 35°.
- the edge 125 is arranged radially on the outside and on the side of the wall 115 facing away from the base 110.
- the edge 125 is preferably arranged at an angle at a second angle ß to the plane of rotation 76 and the base surface 235.
- the edge 125 is preferably arranged at an angle inwardly towards the axis of rotation 45, so that as the distance of the edge 125 from the axis of rotation 45 increases, a third maximum distance 11 of the edge 125 from the base surface 235 increases.
- the edge 125 is essentially band-shaped and is formed without interruption. In a plan view of the edge 125 along the axis of rotation 45, the edge 125 has an annular configuration.
- the edge 125 has a radial width that is greater than zero at every position in the circumferential direction, so that the edge 125 is not interrupted at any position in the circumferential direction.
- the edge 125 is continuously formed.
- the edge is continuously and differently formed over the high point 185, 195 and/or the low point 190, 200.
- the edge is rounded, for example convexly curved.
- the edge 125 can be rounded, for example concavely rounded.
- a sharp-toothed design of the wall 115, in particular at the edge 125 is avoided.
- the edge 125 has a first maximum distance H1 from the floor 110.
- the edge 125 has a first minimum distance G1 from the floor 110 in the axial direction.
- the edge 125 has a second maximum distance from the floor 110.
- the edge has a second minimum distance from the floor 110 in the axial direction.
- the first minimum distance G1 and the second minimum distance are, for example, identical. They can also be different.
- the first maximum distance H1 and the second maximum distance are, for example, identical. They can also be different.
- the edge 125 is thus offset in the direction of the base 110.
- the first minimum distance G1 is selected such that the first wall section 155 also projects beyond the base 110 at the first low point 190. It is particularly advantageous if a fourth ratio H1/R of the first maximum distance H1 to the maximum total radial extent R is greater than 0.1 up to and including 1 and preferably lies in a range from 0.1 up to and including 0.3.
- a fifth ratio G1/R of the first minimum distance G1 to the maximum total radial extent R is greater than 0.05 to 0.95 inclusive and preferably lies in a range from 0.05 to 0.3 inclusive, in particular from 0.08 to 0.2 inclusive.
- a sixth ratio (H1-G1)/R from a difference between the first maximum distance H1 and the first minimum distance G1 and the maximum total radial extent R can be greater than or equal to 0.05 and preferably in a range from 0.05 to 0.1 inclusive.
- the first number of high points 185, 195 is less than or equal to 1 per 0.5 m circumference.
- the second number of low points 190, 200 is less than or equal to 1 per 0.5 m circumference.
- the circumference is here related to the outer edge 130 of the edge 125.
- the second angle ß is smaller than the first angle a.
- the second angle ß can be 0° to 45°, in particular 3° to 12°.
- an inner edge 245 at the third transition 238 of the wall inner side 240 to the edge 125 is continuous and rounded, in the embodiment the outer edge 130 is sharp-edged.
- the sharp-edged design of the outer edge 130 serves to ensure reliable spraying of the molten material 35 from the atomizer element 55.
- the first maximum distance H1 is selected such that the inner edge 245 is also formed at a distance from the outer edge 130 in the first high point 185 and/or the second high point 195. This ensures an essentially continuous annular design of the edge 125 in the circumferential direction.
- FIG 4 shows a sectional view along a cutting plane B-B shown in FIG 2 through the atomizer 20 shown in FIG 1.
- the section plane B-B extends, for example, through the two high points 185, 195.
- a second section 150 adjoins the first section 140 on the side facing the underside 145 of the atomizer element 55, wherein a part of the second section 150 can be elliptical, for example.
- Another design of the second section 150 is also conceivable.
- the part of the second section 150 can be designed in its geometric design as a connecting profile for the positive connection of the atomizer element 55 to the shaft 65.
- the drive device 50 has a carrier unit 250 in addition to the shaft 65.
- the carrier unit 250 is connected to the shaft 65 in a torque-locking manner.
- the carrier unit 250 serves to carry the atomizer element 55 and to fasten it in the housing interior 40.
- the carrier unit 250 has a receptacle 255, wherein the atomizer element 55 is arranged in sections in the receptacle 255.
- the atomizer element 55 protrudes with the first partial section 140 from the receptacle 255, while the second partial section 150 engages in the receptacle 255. In the receptacle 255, the atomizer element 55 is positively connected to the carrier unit 250.
- a torque for driving the atomizer element 55 is preferably exchanged between the drive motor and the atomizer element 55 via the shaft 65 and the carrier unit 250.
- the carrier unit 250 has a carrier ring 266.
- the carrier ring 266 is coupled directly or indirectly to the shaft 65 in a torque-locking manner, in particular in a rotationally fixed manner.
- the carrier ring 266 essentially delimits the receptacle 255.
- the carrier ring 266 is preferably positively connected to the outer peripheral side 135 of the atomizer element 55.
- the carrier ring 266 can have a polygonal profile on an inner peripheral side 280, wherein the outer peripheral side 135 is designed to correspond to the polygonal profile on the inner peripheral side 280 of the carrier ring 266.
- the atomizer element 55 can rest on the carrier unit 250 in the receptacle 255, wherein an axial position of the atomizer element 55 in the receptacle 255 is secured, for example, by a dead weight of the atomizer element 55.
- the carrier unit 250 can be designed to be cooled.
- a cooling medium can be guided to the carrier unit 250 via the shaft 65, which has, for example, an inlet and a return channel, in order to cool the atomizer element 55 on the underside.
- a protective gas channel 285 is arranged in the carrier ring 266.
- the protective gas channel 285 is guided at an angle from the radial outside to the radial inside.
- the protective gas channel 285 opens into the receptacle 255 on the side facing the first section 140.
- a protective gas 290 for example nitrogen, can be blown into the end of the receptacle 255 via the protective gas channel 285 using additional means (not shown). It is particularly advantageous if the protective gas 290 is blown into the receptacle 255 in a circulating manner, i.e. at a circumferential speed, in the direction of the first section 140.
- the protective gas channel 285 is designed at an angle inwards in the direction of the first section 140, the protective gas 290 is blown onto the first section 140, which is arranged outside the receptacle 255. This can reduce oxidation of the atomizer element 55, which is essentially made of graphite.
- the drive motor of the drive device 50 drives the atomizer element 55 via the shaft 65 and the carrier unit 250.
- the atomizer element 55 can rotate about the axis of rotation 45 at a speed of about 500 to 1500 revolutions per minute.
- molten material 35 in particular liquid slag, is introduced into the housing 15 via the feed 30.
- the molten material 35 exits the feed 30 at the mouth 230 and flows downwards along the axis of rotation 45.
- the molten material 35 comes into contact with the atomizer element 55 at the cone element 215.
- the molten material 35 is diverted outwards by the cone element 215 from its movement along the axis of rotation 45.
- the molten material 35 covers the cone element 215.
- the molten material 35 flows in the axial direction along the cone element 215 in the direction of the base 110.
- the molten material 35 is also guided radially outwards towards the base surface 235 under the influence of centrifugal force on the cone element 215.
- the molten material 35 flows radially outwards and is strongly accelerated in the radial and circumferential directions by the rotation of the atomizer element 55. Radially outwards, the molten material 35 hits the wall 115. In the process, the molten material 35 is further accelerated in the radial outward and circumferential directions. Furthermore, the molten material 35 is guided along the inner wall side 240 in the axial direction away from the bottom 110 in the direction of the edge 125.
- the continuous second transition 237 between the bottom surface 235 and the inner wall side 240 has the advantage that accumulations of the molten material 35 are avoided during acceleration radially outwards.
- the cone element 215 ensures reliable coverage of the base surface 235 and the inner wall 240. This prevents oxidation of the atomizer element 55 with atmospheric oxygen and premature departure of the slag from the turntable.
- the molten material 35 flows radially outwards and in the axial direction away from the base 110.
- the molten material 35 flows around the inner edge 245 and remains in contact with the atomizer element 55 through the small second angle ß.
- the rounded third transition 238 prevents the molten material 35 from accidentally spraying off the inner edge 245.
- the molten material 35 flows around the inner edge 245 and flows radially outwards along the edge 125.
- the ring-shaped design of the edge 125 ensures that the molten material 35 flows safely around the inner edge 245, in particular at the high point 185, 195. This reliably prevents the molten material 35 from accidentally detaching, in particular from spraying off the inner edge 245.
- the molten material 35 flows radially from the inner edge 245 over the edge 125 to the outer edge 130, whereby the molten material 35 is sprayed off at the outer edge 130. Due to the soft and rounded design of the edge 125, premature detachment, in particular local detachment of the outwardly flowing molten material 35 from the atomizer element 55 is avoided. This ensures secure coverage of the atomizer element 55, in particular at the high point 185, 195.
- a first part of the molten material 35 leaves the atomizer element 55 on a first trajectory 291 (cf. FIG 1).
- the first drop of the first part of the molten material 35 flies along the first trajectory 291 in the direction of a first housing inner wall section 295 of the first housing inner wall 70.
- the first drop hits the first housing inner wall section 295. Due to the obliquely inclined arrangement of the first housing inner wall 70, the first drop of the molten material 35 bounces off the first housing inner wall section 295 and is deflected substantially downwards along the axis of rotation 45 in the direction of a first storage section 300 of the granulate storage unit 25.
- the continuous and differentiable design of the edge 125 also enables spraying at the high point 185, 195 without the edge 125 at the high point 185, 195 cutting through the layer of molten material 35 on the atomizer element 55 or protruding from the molten material 35. This ensures spraying at the outer edge 130 at the high point 185, 195.
- a second part of the molten material 35 is sprayed from the atomizer element 55 at the outer edge 130 at the first and second low points 190, 200 on a second trajectory 296 at the outer edge 130.
- a second drop of the second part flies along the second trajectory 296, which is arranged axially offset to the first trajectory 291, in the direction of the first housing inner wall 70.
- the second drop strikes the first housing inner wall 70 in a second housing inner wall section 305, which is arranged lower along the axis of rotation 45 and thus on the side of the first housing inner wall facing the granulate storage 25.
- the second drop bounces off the second housing inner wall section 305, which is arranged radially further out than the first housing inner wall section 295 due to the arrangement on the side facing the granulate storage 25, and is deflected in the direction of a second storage section 310 of the granulate storage 25.
- the second storage section 310 of the granulate storage 25 is arranged radially on the outside of the first storage section 300. The second drop flies into the second storage section 310.
- the first drop and the second drop are cooled by the process air blown in by the compressor 95 in the fluidized bed 90 to such an extent that the first drop solidifies in the first storage section 300 and the second drop solidifies at a distance from the first drop in the second storage section 310.
- molten material 35 is also sprayed off at the edge 125 between the high point 185, 195 and the low point 190, 200 at the outer edge 130.
- the additional drops sprayed between the high point 185, 195 and the low point 190, 200 each fly on additional trajectories that are fanned out between the first trajectory 291 and the second trajectory 296 in the direction of the first housing inner wall 70.
- Due to the design of the atomizer element 55 a jet of drops that forms on the atomizer element 55 from the molten material 35 as a result of the spraying is fanned out and hits the first housing inner wall 70 in a fanned out manner between the first and second trajectories 291, 296.
- the fanned out design has the advantage that the drops of the molten material 35 can be prevented from adhering to the first housing inner wall 70 and thus the detachment of conglomerated drops of molten material 35 on the first housing inner wall 70 can be easily avoided.
- fanning out the molten material 35 on the atomizer element 55 has the further advantage that the probability that drops that enter the granulate reservoir 25 in a liquid state do not hit other drops that have not yet solidified is reduced, thus preventing several drops of molten material 35 from sticking together. This ensures high quality and in particular a reliable grain size of the molten material 35 that has solidified into granules in the granulate reservoir 25.
- the molten drops release large amounts of heat into the process air when they cool down.
- the process air can be discharged from the housing interior 40 via the discharge opening 85 and used, for example, to flow through a heat exchanger in order to generate steam.
- This design has the advantage that the dry granulator 10 shown in the figures not only is a high level of process reliability ensured, but also a high quality of the molten material 35 solidified into granules and a corresponding grain size can be ensured, but the heat contained in the molten material 35 can be further utilized.
- the atomizer element 55 In order to ensure a long service life of the atomizer element 55, which is preferably made of graphite, the atomizer element 55 is essentially completely wetted by the molten material 35 on the side facing the mouth 230.
- the design of the edge 125 described above ensures that local flow separation, in particular with bubble formation, and/or local premature spraying of the molten material 35 radially inward to the outer edge 130 is avoided. This ensures that the atomizer element 55, which is heated up to 1500 °C, is protected against oxidation. In particular, oxidation in the region of the first and/or second high point 185, 195 can be avoided. This can prevent premature wear of the atomizer element 55.
- the edge 125 is formed with a slight gradient in the circumferential direction adjacent to the respective high point 185, 195 and low point 190, 200.
- the slight gradient at the edge 125 and the continuous and differentiable formation of the edge in the area of the high point 185, 195 and the low point 190, 200 ensure that the molten material 35 at the edge 125 has an essentially constant layer thickness in the axial direction and the atomizer element 55 is completely covered on the inside of the outer edge 130.
- this can be ensured even under unfavorable operating conditions of the atomizer element 55, for example a high rotational speed in conjunction with a small amount of supplied molten material 35. This prevents oxidation of the atomizer element 55, in particular of the graphite.
- the protective gas 290 can be blown onto the first section 140 by means of the protective gas channel 285, thus creating a Oxidation of the atomizer element 55 on the outer peripheral side 135 can be avoided or reduced.
- the minimal radial wall extension w2 ensures a long service life. Furthermore, reliable spraying behavior is ensured by the blunt wall 115 on the edge 125, even if the wall 115 on the first section 140 on the outer peripheral side 135 has been eroded by oxidation.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Glanulating (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24732924.6A EP4728106A1 (de) | 2023-06-13 | 2024-06-12 | Trockengranulator zur trockengranulierung von schmelzflüssigem material, insbesondere schlacke |
| KR1020267000698A KR20260021736A (ko) | 2023-06-13 | 2024-06-12 | 용융 재료, 특히 슬래그의 건식 과립화를 위한 건식 과립기 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23178944.7A EP4477761A1 (de) | 2023-06-13 | 2023-06-13 | Trockengranultor zur trockengranulierung von schmelzflüssigem material, insbesondere schlacke |
| EP23178944.7 | 2023-06-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024256461A1 true WO2024256461A1 (de) | 2024-12-19 |
Family
ID=86764891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/066229 Ceased WO2024256461A1 (de) | 2023-06-13 | 2024-06-12 | Trockengranulator zur trockengranulierung von schmelzflüssigem material, insbesondere schlacke |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP4477761A1 (de) |
| KR (1) | KR20260021736A (de) |
| WO (1) | WO2024256461A1 (de) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148330A (en) * | 1983-10-24 | 1985-05-30 | British Steel Corp | Improvements in or relating to the granulation of slag |
| EP0687650A1 (de) * | 1994-06-13 | 1995-12-20 | WOKA Schweisstechnik GmbH | Verfahren und Vorrichtung zur schmelzmetallurgischen Herstellung von Hartstoffen |
| JP2003342047A (ja) | 2002-05-23 | 2003-12-03 | Jfe Steel Kk | 溶融スラグの造粒方法および造粒装置 |
| EP2300139A1 (de) * | 2008-06-27 | 2011-03-30 | Commonwealth Scientific and Industrial Research Organisation | Drehzerstäuber zum zerstäuben von schmelzflüssigem material |
| WO2011124455A1 (de) | 2010-04-09 | 2011-10-13 | Siemens Aktiengesellschaft | Vorrichtung zur erzeugung eines granulats aus einer mineralischen schmelze |
| DE102010021660A1 (de) * | 2010-05-26 | 2011-12-01 | Siemens Aktiengesellschaft | Vorrichtung zur Erzeugung eines Granulats aus einer mineralischen Schmelze |
| CN102690911A (zh) * | 2012-05-31 | 2012-09-26 | 四川川润股份有限公司 | 一种高炉炉渣造粒装置 |
| EP2747920B1 (de) | 2011-08-26 | 2017-03-15 | Primetals Technologies, Limited | Vorrichtung zur granulierung von asche |
| CN106755664A (zh) | 2016-12-29 | 2017-05-31 | 迁安首钢设备结构有限公司 | 热态钢渣转碟式粒化罐装置 |
| CN108998604A (zh) | 2018-09-05 | 2018-12-14 | 安徽工业大学 | 一种高炉渣粒化及余热回收的装置 |
| CN112501366A (zh) | 2020-12-16 | 2021-03-16 | 河南省冶金研究所有限责任公司 | 一种具有风淬功能的冶炼熔渣双层离心粒化装置 |
-
2023
- 2023-06-13 EP EP23178944.7A patent/EP4477761A1/de not_active Withdrawn
-
2024
- 2024-06-12 EP EP24732924.6A patent/EP4728106A1/de active Pending
- 2024-06-12 KR KR1020267000698A patent/KR20260021736A/ko active Pending
- 2024-06-12 WO PCT/EP2024/066229 patent/WO2024256461A1/de not_active Ceased
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2148330A (en) * | 1983-10-24 | 1985-05-30 | British Steel Corp | Improvements in or relating to the granulation of slag |
| EP0687650A1 (de) * | 1994-06-13 | 1995-12-20 | WOKA Schweisstechnik GmbH | Verfahren und Vorrichtung zur schmelzmetallurgischen Herstellung von Hartstoffen |
| JP2003342047A (ja) | 2002-05-23 | 2003-12-03 | Jfe Steel Kk | 溶融スラグの造粒方法および造粒装置 |
| EP2300139A1 (de) * | 2008-06-27 | 2011-03-30 | Commonwealth Scientific and Industrial Research Organisation | Drehzerstäuber zum zerstäuben von schmelzflüssigem material |
| WO2011124455A1 (de) | 2010-04-09 | 2011-10-13 | Siemens Aktiengesellschaft | Vorrichtung zur erzeugung eines granulats aus einer mineralischen schmelze |
| DE102010021660A1 (de) * | 2010-05-26 | 2011-12-01 | Siemens Aktiengesellschaft | Vorrichtung zur Erzeugung eines Granulats aus einer mineralischen Schmelze |
| EP2747920B1 (de) | 2011-08-26 | 2017-03-15 | Primetals Technologies, Limited | Vorrichtung zur granulierung von asche |
| CN102690911A (zh) * | 2012-05-31 | 2012-09-26 | 四川川润股份有限公司 | 一种高炉炉渣造粒装置 |
| CN106755664A (zh) | 2016-12-29 | 2017-05-31 | 迁安首钢设备结构有限公司 | 热态钢渣转碟式粒化罐装置 |
| CN108998604A (zh) | 2018-09-05 | 2018-12-14 | 安徽工业大学 | 一种高炉渣粒化及余热回收的装置 |
| CN112501366A (zh) | 2020-12-16 | 2021-03-16 | 河南省冶金研究所有限责任公司 | 一种具有风淬功能的冶炼熔渣双层离心粒化装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20260021736A (ko) | 2026-02-13 |
| EP4728106A1 (de) | 2026-04-22 |
| EP4477761A1 (de) | 2024-12-18 |
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