Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F9/00—Making metallic powder or suspensions thereof
  • B22F9/02—Making metallic powder or suspensions thereof using physical processes
  • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D5/00—Machines or plants for pig or like casting
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F9/00—Making metallic powder or suspensions thereof
  • B22F9/02—Making metallic powder or suspensions thereof using physical processes
  • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F9/00—Making metallic powder or suspensions thereof
  • B22F9/02—Making metallic powder or suspensions thereof using physical processes
  • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
  • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
  • B22F9/00—Making metallic powder or suspensions thereof
  • B22F9/02—Making metallic powder or suspensions thereof using physical processes
  • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
  • B22F2009/045—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling
  • B22F2009/047—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by other means than ball or jet milling by rolling

Definitions

• the present invention relates to the field of the metallurgical industry.
• a conditioning phase consisting in obtaining, from the metal in the liquid state, solid state metal fragments must be carried out. , having specific dimensions.
• Such a demand for products in the form of fragments concerns in particular ferroalloys and silicon-metal.
• a cooling and fragmentation process is being carried out which consists in producing a bowl of sand, casting the metal in the liquid state in this bowl to form a block and destroying and crushing or crushing the block so as to obtain metal fragments in the solid state.
• Such a method requires to achieve for each casting a bowl of sand and to have a very expensive installation of destruction and crushing blocks. This process is particularly time-consuming and therefore expensive and generates a large production of unwanted metal fines or dusts of up to 15% of the production.
• US Pat. No. 3,707,182 discloses a rotary table on which a liquid material is poured. The table is uniformly cooled, so that the material becomes homogeneous and breaks down.
• This process comprises:
• the metal is preferably laminated when it reaches said fragmentation roll.
• the method may include: circulating an emulsion of a liquid and a gas in transverse channels of an upstream cooling zone and circulating a liquid in transverse channels of a downstream cooling zone, these cooling zones succeeding one another in the longitudinal direction of said reception tables.
• Said second table can constitute said downstream table.
• the method can include: passing the metal onto the receiving surface of at least one cooled intermediate table located between said second table and said downstream table, causing the metal to fall from one table to another,
• the fragmentation roller may be subjected, on a first race, to first springs and, on a second race pro along the first race, to second springs adding to the first springs.
• An installation may include:
• a first vibrating table comprising a first metal receiving surface having an upstream end and a downstream discharge end, means for cooling the first table, means for vibrating the first table so that the metal moves from the upstream to downstream,
• a second vibrating table comprising a second metal receiving surface having an upstream end and a downstream discharge end, the upstream part of the receiving surface of the second table being situated below and at a distance from the downstream end; of the first receiving surface of the first table, so that the metal drops from the first table to the second table, means for cooling the second table, means for vibrating the second table so that the metal moves from upstream to downstream,
• a vibrating downstream table comprising a metal receiving surface having an upstream end and a downstream discharge end and means for vibrating the downstream table so that the metal moves from the upstream to the downstream, at least one rotating fragmentation roller p laced above this downstream table and transversely to the displacement of the metal on this table.
• Said second table can constitute said downstream table.
• the installation may comprise at least one intermediate table located between said second table and said downstream table, means for vibrating this intermediate table and means for cooling this intermediate table.
• the tables may include receiving plates which are selected from copper except for at least the portion of said downstream table below said fragmentation roll which includes a plate which is selected from steel.
• the means for vibrating said tables may be common.
• the means for vibrating said tables can be separated.
• the said tables may comprise plates, the cooling means having channels for circulating a cooling fluid, arranged inside these plates.
• Said tables may comprise, in an upstream zone of the installation, at least one plate having circulation channels provided with injectors of a liquid - cooling gas emulsion and, in a downstream zone following said upstream zone, at least a plate having channels for circulating a coolant.
• the installation may comprise means for suspending said fragmentation roller including return springs.
• Said suspension means may comprise rockers on which the ends of the fragmentation roller are mounted rotating, movable support means of these rockers, return means of the fragmentation roller opposing the movements of the rockers relative to the moving means of support and return means opposing the movements of said movable supports.
• the return means may be, at said equilibrium position, prestressed.
• Said fragmentation roller may be placed above a downstream part of the downstream table.
• the fragmentation roll may be provided at its periphery with a plurality of protruding fingers.
• At least the upstream portion of the receiving surface of the first table is inclined downstream.
• An installation for converting a metal in the liquid state to a solid and fragmented metal may include:
• said receiving plates being selected from copper and being provided with cooling means, with the exception of the receiving plate located below said rotating fragmentation roll which is selected from a steel.
• At least two successive receiving plates can be strongly offset in the vertical direction so that the metal drops from one to the other.
• the installation may comprise an upstream zone in which at least one plate has circulation channels provided with injectors of a liquid - cooling gas emulsion and a downstream zone following said upstream zone in which at least one plate has channels. circulation of a coolant.
• the installation may comprise means for suspending said fragmentation roller including return springs.
• at least the upstream portion of the receiving surface of the first table or upstream table is inclined downstream.
• An installation may include:
• At least one rotating fragmentation roll placed above said receiving table and transversely to the movement of the metal on said receiving plate
• fragmentation roller comprising rockers on which the ends of the fragmentation roller are mounted rotating, movable supports of these rockers, return means of the fragmentation roller opposing the movements of the rockers relative to the supports mobile and return means opposing the movements of said movable supports.
• An installation may comprise a receiving table on which the metal moves from upstream to downstream, this receiving table comprising, in an upstream zone, at least one plate having circulation channels of a liquid-gas emulsion and in a downstream zone succeeding the upstream zone, plates having channels for circulating a coolant.
• An installation may include:
• a vibrating table having a surface for receiving the metal
• the inclination of the upstream portion of the receiving surface of the first table may be between two and ten degrees.
• FIG. 1 shows a perspective view of an installation
• Figure 2 shows a longitudinal vertical section of the installation of Figure 1;
• Figure 3 shows a longitudinal vertical section of a first longitudinal table of the installation of Figure 1;
• Figure 4 shows a longitudinal vertical section of a second longitudinal table of the installation of Figure 1;
• Figure 5 shows an end view from downstream to the upstream of the installation of Figure 1;
• Figure 6 shows a horizontal section of a plate of the first longitudinal table of the installation of Figure 1;
• FIG. 7 is a perspective view of a downstream portion of the second longitudinal table of the installation of FIG. 1, illustrating a fragmentation roller mechanism
• Fig. 8 is a side view of the fragmentation roller mechanism of Fig. 7;
• This installation 1 is more particularly suitable for such a transformation of metals such as ferroalloys or silicon metal.
• the installation 1 can comprise, successively, between a spill station 2 and an evacuation station 3, a plurality of longitudinal tables succeeding each other, of which a first table longitudinal 4 and a second longitudinal table 5, this second table 5 constituting a downstream table of the installation.
• the first longitudinal table 4 may comprise a plurality of successive plates 6, preferably copper, for example five, which substantially define a first longitudinal receiving surface 7 of the metal, which has an upstream end 7a and a downstream end 7b.
• the successive plates 6 overlap slightly, being vertically offset in steps corresponding substantially to their thicknesses, the upstream plates having downstream transverse edges placed on transverse edges upstream of the downstream plates, the upper face of each plate 6 being substantially horizontal and having longitudinal edges 6a of lateral delimitations, projecting upwards.
• the first table 4 comprises a frame 8 which comprises longitudinal members 9 which extend below the lateral parts of the plates 6 and on which the latter are fixed by means of supports 10, the longitudinal members 9 being connected by sleepers 1 1.
• the frame 8 is mounted on a fixed frame 12 via a plurality of springs 13 and the frame 8 is connected to the frame 12 via a vibration generating member 14 adapted to vibrate the frame 8.
• the second longitudinal table 5 may comprise a plurality of successive plates 15, preferably made of copper, for example two, and an end plate 16, preferably made of steel, which define substantially a second longitudinal receiving surface 17 of the metal, which has an upstream end 17a and a downstream end 17b.
• the successive plates 15 and 16 overlap slightly, the upstream plates having downstream transverse edges placed on transverse edges upstream of the downstream plates, the upper face of each plate being substantially horizontal and having flanges. longitudinal 15a and 16a of lateral delimitations, projecting upwards.
• the second table 4 comprises a frame 1 8 which comprises longitudinal members 19 which extend below the lateral parts of the plates 15 and 16 and on which the latter are fixed, the longitudinal members 19 being connected by crosspieces 20.
• the frame 1 8 is mounted on a fixed frame 21 via a plurality of springs 22 and the frame 1 8 is connected to the frame 21 via a vibration generating member 23 adapted to vibrate the frame 1 8.
• the second table 4 is placed so that an upstream portion of its longitudinal receiving surface 17 is located below and at a distance from the downstream end 7b of the longitudinal receiving surface 7 of the first longitudinal table 4, creating and a strong discontinuity between the first longitudinal receiving surface 7 and the second longitudinal receiving surface 17.
• the plates 6 and 15 have pluralities of internal cooling channels which extend transversely in planes parallel to their upper faces and which can be connected to sources of cooling fluids so as to circulate in these channels these fluids in order to cool these plates.
• each plate 6 of the first table 4 has a plurality of transverse channels arranged in pairs of channels 24 and 25, so that the ends of each pair of channels, situated on one side of this plate are connected by recirculating U bends 26, whose other ends located on the other side of the plate are one provided with an injector 27 and the other connected to an outer conduit 28.
• Each injector 27 is attached to the side of the plate 6 and has an interior emulsion chamber 29 in which a coolant such as water and a cooling gas such as nitrogen are fed through ducts.
• a coolant such as water and a cooling gas such as nitrogen are fed through ducts.
• outer 30 and 31 to be mixed and injected axially in each inner channel 24 of the plate 6 to be discharged through the outer conduit 28 corresponding.
• the first longitudinal table 4 forms an upstream cooling zone.
• the plates 15 of the second longitudinal table 5 have transverse cooling channels 32 which can be arranged as above, but without the provision of inj ectors, so as to circulate only a coolant such as some water.
• the second longitudinal table 5 forms an upstream cooling zone.
• the upstream cooling zone could extend over a portion of the length of the first longitudinal table 4 or extend on the second longitudinal table 5, the downstream cooling zone being arranged accordingly.
• the installation 1 comprises a fixed frame 34 which carries an inclined longitudinal ramp 35 preferably provided with a refractory material, which is situated above and behind the upstream portion of the receiving surface. 7 of the first table 4 and which can also be equipped with transverse channels 36 for cooling by a suitable fluid.
• the installation 1 is equipped, at the dumping station 2, with maneuvering means 33 for receiving a bag 37 and maneuvering the latter.
• the first or first plates 6 forming the upstream portion of the receiving surface 7 of the first table 4 are slightly inclined downstream by a few degrees, while all the other plates of the installation can be horizontal. . According to an alternative embodiment, all the plates could be slightly inclined downstream.
• Installation 1 can operate and be used as follows.
• the vibration generating members 14 and 23 are in such a way that the plates 6 carried by the frame 9 of the first longitudinal table 4 vibrate and that the plates 15 and 16 carried by the frame 1 8 of the second longitudinal table 5 vibrate, independently.
• the cooling fluids circulate in the aforementioned inner channels of the plates 6 and 15 of the longitudinal tables 4 and 5.
• a pocket 37 containing a metal M in the liquid or molten state is placed at the dumping station 2.
• the pocket 37 is maneuvered to discharge the metal M in a controlled manner onto the inclined ramp 35 (FIG. 2, arrow F 1).
• the metal M in the liquid state flows over the inclined ramp 35 and discharges onto the upstream part of the receiving surface 7 of the first table ( Figure 2, arrow F2), spreading further to form a web (not shown).
• the metal M in the form of a sheet moves from the upstream to the downstream side on the receiving surface 7 of the first longitudinal table (FIG. 2, arrow F3) and, concomitantly and progressively, under the effect of the cooling induced by the cooled plates 6, the metal M cools relatively rapidly, solidifies, and breaks up, forming fragments at as he progresses.
• the fragments of the metal M discharge and fall on the upstream portion of the receiving surface 17 of the second longitudinal table 5 ( Figure 2, arrow F4), a height such that their fall further causes their fragmentation. This is a fall from a height which is much greater than the reduced drops induced during the passage of metal M from one receiving plate to the other of each of the tables.
• the installation 1 can be equipped with vertical plates 39 and / or suspended chain curtains 40, placed longitudinally on each side and above the edges of the receiving surfaces 7 and 17 and a plate 41 placed transversely below the downstream edge of the first longitudinal table and above the upstream edge of the second longitudinal table.
• the installation 1 could be equipped with covers (not shown) extending above and away from the longitudinal tables 4 and 5 and above the discharge station.
• first longitudinal table 4 and the second longitudinal table 5 could be interconnected and mounted on a common fixed frame.
• first longitudinal table 4 and the second longitudinal table 5 could be subjected to a common vibration generating member.
• the level difference between the downstream portion of the first longitudinal table and the upstream portion of the second longitudinal table may be greater than twelve percent of the length of the first table.
• the length of the first longitudinal table 4 could be between four and six meters and the height of the fall between the first longitudinal table 4 and the second longitudinal table 5 could be between sixty and ninety centimeters.
• the length of the second longitudinal table 5 could be between two and four meters.
• the width of the longitudinal tables 4 and 5 can be between two and four meters.
• the thickness of the plates 6, 15 and 16 could be between six and eight centimeters, the reduced falls between the plates of each table being in proportion to these thicknesses.
• the thickness of the sheet of metal M, after pouring of the liquid metal may be between one half and ten centimeters.
• the temperature of the fragments of this metal when they reach the end of the first longitudinal table 4 may be between 400 ° C and 800 ° C and the temperature of the fragments of this metal when they reach the end of the second longitudinal table 5 may be between 150 ° C and 300 ° C.
• the plates 6 and 15 of copper may be covered, at least on their upper surfaces for receiving the metal M, with a protective layer such as for example zircon or graphite.
• the installation 1 may further comprise at least one fragmentation transverse roller mechanism 101, placed for example above the end receiving plate 16 of the second longitudinal table 5.
• at least one fragmentation transverse roller mechanism 101 placed for example above the end receiving plate 16 of the second longitudinal table 5.
• two mechanisms 101 longitudinally offset from upstream to downstream are provided.
• the mechanism 101 comprises a transverse rotary driven fragmentation roller 102 which is carried by suspension means 103 mounted on the fixed frame 21.
• the suspension means 101 comprise end rockers 104 which carry the ends of the roller 102, one of which is provided with a hydraulic drive motor 105, for example.
• the suspension means 103 furthermore comprise an upper cradle 106 which comprises lateral supports 107 connected by sleepers 108 and articulated on the fixed frame 21 via transverse pivots 109.
• the end rockers 104 are connected to the lateral supports 107 via pairs of front and rear rods 110 and 111 whose lower ends are provided with heads 112 and 113 which are articulated, on either side of the ends of the roller 102, on the rockers 104 via transverse pins 114 and 115 and which slide freely through longitudinal arms 116 of the lateral supports 107, the upper ends of the rods 110 and 111 being provided with setting nuts 117 and 118
• the rods 110 and 111 are arranged to form upwardly open V's.
• the suspension means 103 further comprise central rods 119, substantially vertical, whose lower ends are provided with heads 120 which are hinged to the fixed frame 21 via transverse pivots 121 and which slide freely through longitudinal arms. 122 of the lateral supports 107. The longitudinal arms 116 and the longitudinal arms 122, located next to each other, are parallel and are connected by transverse plates 123. The upper ends of the central rods 119 are provided with adjusting nuts 124 .
• the heads 120 have shoulders 125 on which can support the longitudinal arms 122.
• the suspension means 103 also comprise means for returning the roller 102 to an equilibrium position.
• These return means comprise pairs of springs 126 and 127 which are arranged around the rods 110 and 111, between the heads 112 and 113 and the end portions of the longitudinal arms 116, the prestressing of these springs 126 and 127 being ensured by the nuts 117 and 118.
• These return means also comprise central springs 128 which are arranged around the rods 119, between the longitudinal arms 122 by means of washers 129 and the nuts 124, by means of washers 1 30, the prestressing of these springs 128 being ensured by the nuts 124.
• the roller 102 is cylindrical and is provided at its periphery with projecting pins or projections 13 1 partially engaged in the housings of the roller 102 and fixed by means of screws 132.
• the roll 1 02 is cylindrical and is provided at its periphery with studs or projecting fingers 133 screwed directly into the housings of the transverse roll.
• the mechanism 101 can operate as follows.
• the cradle 106 In the low equilibrium position of the fragmentation roller 102, on the one hand the cradle 106 is in the low position, the longitudinal arms 1 12 being constrained to bear on the shoulders 125 of the heads 120 of the rods 1 19 under the the effect of the springs 128, and, on the other hand, the nuts 1 17 and 1 1 8 abut on the longitudinal arms 1 16 under the effect of the springs 126 and 127.
• the cooling of the metal M along its path upstream of the mechanism 101 is such that the metal fragments M are isolated when they reach this mechanism 101.
• the fingers of the transverse roller 102 can meet the fragments, including the largest and / or clusters of fragments , and possibly provoke their fragmentation by percussion or punching.
• the transverse roller 102 may tend to lift and move upstream and / or downstream, by upward movement and / or tilting. end rockers 104, compressing return springs 126 and 127.
• the transverse roller 102 may tend to still lift. In this case, to compensate for additional stresses acting on the transverse roller 1 02, it is then the cradle 106 which can lift by pivoting about the transverse pivots 109, away from the shoulders 125 and compressing the central springs 128.
• the springs 126 and 127 on the one hand and the central springs 128 on the other hand are dimensioned and prestressed so that the increase of the above fragmentation effects, resulting from the above progressivity of the transverse roller raises 1 02, is established by the fact that the springs 126 and 127 oppose the lifting of the transverse roller 102 on a first stroke and that the central springs 128 are added to the springs 126 and 127 to oppose an additional lift of the transverse roller 102 on a second race extending up the first race.
• the fragmentary transverse roller mechanism 101 could be provided at another location along the longitudinal tables 4 and 5.
• a plurality of spaced-apart fragmentation transverse roller mechanisms 101 could be provided. be provided along one or more longitudinal tables 4 and 5.
• the cradle 106 pivotally mounted could be replaced by vertical sliding means carrying the rockers 104 and subjected to central springs equivalent to the central springs 128.
• the installation 1 comprises, between the first table 4 and the last table 5 previously described, several successive intermediate vibrating tables 42, which respectively comprise a plurality of successive copper plates 43, determining metal receiving surfaces 44 and which are respectively provided with vibration drive means which may be equivalent to those described above.
• the successive plates 43 of each intermediate table 42 overlap slightly, the upstream plates having downstream transverse edges placed on transverse edges upstream of the downstream plates, the upper face of each plate being substantially horizontal.
• the downstream end edges of the plates of the intermediate tables 42 are situated above and at a distance from the upstream end edges of the upstream plates of the tables which succeed them, so that each can vibrate independently.
• the falls of the metal M thus caused may be much lower than the significant drop occurring between the first table 4 and the first of the intermediate tables 43.
• the first plate or plates 6b, which determine an upstream zone, of the first table 4 are inclined downstream, so that when the metal M is discharged from the ramp 35 , this inclination produces a driving effect downstream of the metal M and prevents the metal stagnates on these plates, thus making the cooling more efficient and protecting the plates against the risk of tearing the metal plates and perforation.
• this inclination can be between two and ten degrees.
• the plate 16 located below the mechanism (s) 110 could be provided on a last vibrating table receiving independent of the previous reception tables.
• fragmentation transverse roller mechanism 101 and the cooling means producing, on the receiving table or tables, a first cooling zone using a liquid-cooling gas emulsion and a second zone using only a cooling liquid.
• the fragmentation transverse roller mechanism 101 and the cooling means producing, on the receiving table or tables, a first cooling zone using a liquid-cooling gas emulsion and a second zone using only a cooling liquid.
• one or more fragmentation transverse roller mechanisms 10 1 could be provided over prior tables, especially on at least one of the intermediate tables 42, preferably providing steel plates below these mechanisms.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Heat Treatments In General, Especially Conveying And Cooling (AREA)
• Metal Rolling (AREA)
• Crushing And Grinding (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=48856756

Family Applications (1)

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Families Citing this family (8)

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• 2013
  • 2013-03-06 FR FR1352004A patent/FR3002869B1/fr not_active Expired - Fee Related
• 2014
  • 2014-03-03 US US14/773,254 patent/US9950371B2/en active Active
  • 2014-03-03 CN CN201480012522.1A patent/CN105228776B/zh active Active
  • 2014-03-03 CA CA2901872A patent/CA2901872C/fr active Active
  • 2014-03-03 EA EA201591651A patent/EA031271B1/ru not_active IP Right Cessation
  • 2014-03-03 EP EP14707426.4A patent/EP2964412B1/de active Active
  • 2014-03-03 WO PCT/EP2014/054096 patent/WO2014135501A2/fr not_active Ceased
  • 2014-03-03 BR BR112015021697-8A patent/BR112015021697B1/pt active IP Right Grant
  • 2014-03-03 ES ES14707426T patent/ES2777974T3/es active Active
• 2015
  • 2015-09-01 ZA ZA2015/06389A patent/ZA201506389B/en unknown

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