SE192589C1

SE192589C1 -

Info

Publication number: SE192589C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: H E Storr Prioritet begard frdn den 16 augusti 1960 (Storbritannien) Foreliggande uppfinuing hanfOr sig till granulering av small jam-, slagg- eller stalmaterial. Inventor: H E Storr Priority requested from 16 August 1960 (Great Britain) The present invention relates to the granulation of small jam, slag or steel materials.

Ett syfte med uppfianingen Or att astadkomma jarn-, slagg eller stalgranuler med hog volymvikt, som Oro stora och ha en i huvudsak Amu storlek. An object of the invention is to provide iron, slag or steel granules with a high volume weight, which are large in size and have a substantially Amu size.

Ett annat syfte med uppfinningen ar att Astadkomma jarn-, slagg- eller stalgranuler, som Oro lampligt formade for att vara latta att handskas med, exempelvis medelst transportband och som latt stromma i volymform exempelvis genom ran= och genom fickfluster. Another object of the invention is to provide iron, slag or steel granules which Oro are suitably shaped to be easy to handle, for example by means of conveyor belts and which are allowed to flow in volume form, for example by robbery and by pocket fluff.

Enligt fiireliggande uppfinning astadkommes ett satt att granulera smalt jam-, slaggeller stalmaterial, varvid man riktar en str8mning av small material genom luftatmosfdr, utsatter den smdlta materialstrommen for inverkan av vattenstralar for att bilda en dusch av varma materialpartiklar, och att man uppsamlar de fallande partiklarna i ett karl in- nehällnde vatten, i vilket partiklarna falla och genom vilket de sjunka och uppfinningen kannetecknas i huvudsak darav, att vattnet som hildar stralarna dr varmt och att vattnet i uppsamlingskarlet Or varmt, varvid varmet hos vattnet resulterar i bildandet av I huvudsak sfaroidala jam-, slagg- eller stalgranuler med relativt hog volymvikt. For enkelhetens skull anvandes i fortsattningen ordet Dma- terial» fOr att betecknaslagg- eller stalmateriab. According to the present invention there is provided a method of granulating narrow iron, slag or steel material, directing a flow of small material through air atmosphere, subjecting the molten material stream to the action of water jets to form a shower of hot material particles, and collecting the falling particles. in a vessel containing water, in which the particles fall and through which they sink, and the invention can be characterized mainly by the fact that the water which hides the jets is hot and that the water in the collecting vessel is hot, the heat of the water resulting in the formation of substantially spheroidal jam, slag or steel granules with a relatively high volume weight. For the sake of simplicity, the word D-material »is used in the continuation» to denote slag or steel material.

Vattenstrdlarnas temperatur ligger fOretradesvis i ett omrade c:a 60-70° C. The temperature of the water jets is preferably in a range of about 60-70 ° C.

Vattentemperaturen i uppsamlingskdrlet Egger foretradesvis mom ett omrade av c:a 80-95° C. The water temperature in the Egger collection vessel is preferably in the range of about 80-95 ° C.

Fi5retradesvis genomfores temperaturkontroll hos vattnet i uppsamlingskarlet genom tillsattning av kontrollerade mangder kylvatten till karlet fran en kylvattenkalla. First, temperature control of the water in the collection vessel is performed by adding controlled amounts of cooling water to the vessel from a cooling water source.

Det liar visat sig, att den nyssnamnda tvastegsbehandlingen av smaltmaterial med vatten med hog temperatur i stallet for med kylvatten resulterar i en my produkt, namligen en granul eller en partikel av i huvudsak sfaroidal form, som liar en relativt hog volymvikt. It has been found that the aforementioned two-step treatment of molten material with high temperature water instead of cooling water results in a soft product, namely a granule or a particle of substantially spheroidal shape, which has a relatively high bulk density.

Betraffande den nya och vardefulla sfaroidala formen hos partikeln eller granulen farefaller det, som den relativt langsamma kylningen av den smalta materialgranulen, sasom astadkommes i enlighet med foreliggande uppfinning, tillfOrsakrar att granulen kvarblir i plastiskt eller smalt tillstAnd lange for ytspanningskrafter att verka pd densamma och giva den en sfaroidal form. Mojligen bidrager den hoga temperaturen hos vattnet till ett plOtsligt bildande av ett isolerande skikt av anga kring granulen och till att detta skikt tillater en viss sfaroidisering av ganulen att aga rum under det inbegripna korta tidsintervallet. Regarding the new and valuable spheroidal shape of the particle or granule, it is dangerous that the relatively slow cooling of the narrow material granule, as achieved in accordance with the present invention, causes the granule to remain in a plastic or narrow state long for surface tension forces to act on it. it a spheroidal shape. Possibly, the high temperature of the water contributes to a sudden formation of an insulating layer of anga around the granule and to the fact that this layer allows a certain spheroidization of the ganule to take place during the included short time interval.

Anordning for ett genomforande av sattet enligt fOreliggande uppfinning, som kannetecknas darav, att densamma innefattar ledningsanordningar for att rikta en stromning av smalt jam-, slagg- eller stalmaterial genom luftatmosfar, ett flertal munstycken anordnade under ledningsanordningarna och anpassade for att rikta stralar av varmt vatten tvars mot den smalta materialstromningen for att ddrigenom fran densamma bilda en dusch av varma materialpartiklar, ett karl f8r att mottaga varmt vatten, i vilket de varma materialpartiklarna falla och genom vilket de sjunka, och dammbord vid kanten hos karlet, som Oro anpassade for att tillata en OverstrOmning frau kfirlet via en fOrutbestamd niva, var- 2— — vid organ for tillforsela av kylvatten aro anpassade for att utmynna i karlet ()eh justerbara for att yariera mangden tillfort kylvatten. Apparatus for carrying out the set according to the present invention, characterized in that it comprises conduit means for directing a flow of narrow jam, slag or steel material through air atmosphere, a plurality of nozzles arranged below the conduit means and adapted to direct jets of hot water transverse to the narrow flow of material to thereby form therefrom a shower of hot material particles, a vessel for receiving hot water, into which the hot material particles fall and through which they sink, and a steam table at the edge of the vessel, which Oro adapted to allow A FLOOD from the vessel via a predetermined level, where- 2— - means for supplying cooling water are adapted to open into the vessel () eh adjustable to increase the amount of supplied cooling water.

Det smalta materialet tages yanligtvis antingen a) fran tapphalet hos en masugn, eller b) fran skankar med yarm metall. I fallet enligt a) skulle Taring-his erfordras ett flertal enheter for alt arbeta med den fran masugnen variabla materialstrommen, varvid den fOrsta enheten automatiskt skulle ta dess forutbestamda omfattning av materialstrOmningen och varvid vane oyerskott skulle stromma over till nasta enhet OSV. I fallet b) kan materialstrommen regleras till det maximum, som enheten kunde ta. The narrow material is usually taken either a) from the tap tail of a blast furnace, or b) from shanks with hot metal. In the case according to a), the Taring-his would require a number of units to work with the material stream variable from the blast furnace, the first unit automatically taking its predetermined extent of the material flow and the usual excess surplus flowing to the next unit etc. In case b) the material flow can be regulated to the maximum that the unit could take.

Utforingsformer enligt uppfinningen komma att i fortsattningen beskrivas medelst exempel och med hanyisning till bifogade ritningar enligt yilka: Fig. 1 visar en vy °vanifran ay en typ ay jarngranuleringsanordning. Fig. 2 visar en sidoyy utefter linjen AA hos fig. 1. Fig. 3 visar en. delvy oyanifran av tillforselorgan for kylvatten, varvid riirledningar aro symmetriskt anordnade kring langsgaende centrumlinjer hos trattar eller fickor. Fig. 4 visar en tvarsektion yid botten av uppsamlingskarlet. Fig. 5 och 6 visa sidoresp. andvyer av en tappranna for metall och dess spridarhuvud. Fig. 7 och 8 visa framifran resp i tvarsektion dammbordsdelar i uppsamlingskarlet. Fig. 9 visar en tvarsektion av en annan utforingsform av en anordning for granulering ay jam. Embodiments according to the invention will be described in the following by way of example and with reference to the accompanying drawings according to which: Fig. 1 shows a view from outside ay a type ay iron granulation device. Fig. 2 shows a side view along the line AA of Fig. 1. Fig. 3 shows a. partial view of cooling water supply means, conduits being symmetrically arranged about longitudinal centerlines of funnels or pockets. Fig. 4 shows a cross section yid the bottom of the collecting vessel. Figs. 5 and 6 show side responses. views of a metal tap and its spreader head. Figs. 7 and 8 show from the front and in cross section, respectively, dust table parts in the collecting vessel. Fig. 9 shows a cross section of another embodiment of a device for granulation ay jam.

Enligt fig. 1-8, tappas tackjarn fran en masugn i en tippskank 1, som kontrolleras med en elektrisk lyftanordning 2 fran ett kontrollrum 3 och foranleder skanken att tippa langsamt och regelbundet. Lyftanordningen 2 an forsedd med motor Mr yariabel hastighet och vaxel for att tillforsakra en konstant hastighet hos jarnuttomningen vid alla metallnivaer i skanken och en snabb atergang hos den tomda skanken till mottagningslage. Skanken tommer det smalta jarnet i en behallare eller en utjamningsgrop 4 med sidayaggar kanaliserade i riktning mot en oppning, genom vilken metallen passerar in i toppanden av en nedatriktad lutande sandinkladd ledning 5, som delar upp sig for att hilda par av sandinkladda grenledningar 6 och 7. I bottenanden av varje gTenledning 6 och 7 är anbringat ett block 8 ay eldfast material, foretradesvis kol av lamplig storlek och form for kontroll av strommen, av smalt jam fran grenledningen. Det smalta jarnet strommar i form av ett brett band 9 fran bottenanden av grenledningen och faller i ett brett band genom atmosfaren. According to Figs. 1-8, the pig iron is dropped from a blast furnace in a tipping shank 1, which is controlled with an electric lifting device 2 from a control room 3 and causes the shank to tip slowly and regularly. The lifting device 2 is equipped with a motor Mr variable speed and gear to ensure a constant speed of the iron emptying at all metal levels in the shank and a fast return of the empty shank to the receiving position. The shank empties the narrow iron into a container or leveling pit 4 with side jaws channeled in the direction of an opening, through which the metal passes into the top end of a downwardly inclined sand-lined conduit 5, which divides to support pairs of sand-lined branch conduits 6 and 7. At the bottom end of each line 6 and 7 is placed a block 8 of refractory material, preferably carbon of suitable size and shape for controlling the current, of narrow jam from the branch line. The narrow iron flows in the form of a wide band 9 from the bottom end of the branch line and falls in a wide band through the atmosphere.

Omedelhart under bottenanden has varje grenledning 6, 7 am anordnat ett vattenstraleller spruthuvud 10 innehallande ett flertal sprutoppningar 11, som rikta vattnet utat i I huvudsak horisontala str8mningar. Antages de fallande smalta metallbanden vara i det narmaste vertikala, sla vattenstralarna fran huvudena mot banden vid i det narmaste rata vinklar. Vattenstralarna bryta upp bander,. till partiklar och sprida partiklarna horisontalt i duschar. Spruthuvudena 10 aro ma--lade med varmvatten fran en lamplig kalla med hogtryckspump (icke visad) och stromningen av yarmt vatten under tryck till varje spruthuvud bringas genom. en ledning 12 och en yentil 13. Temperaturen hos de varma vattenstralarna ligger foretradesvis i omradet 60-70° C. Immediately below the bottom end, each branch line 6, 7 am has arranged a water jet or spray head 10 containing a plurality of spray openings 11, which direct the water outwards in substantially horizontal currents. Assuming the falling narrow metal strips are almost vertical, strike the water jets from the heads towards the strips at the closest right angles. The water jets break up the bands ,. to particles and spread the particles horizontally in showers. The spray heads 10 are ground with hot water from a suitable cold with a high pressure pump (not shown) and the flow of hot water under pressure to each spray head is passed through. a line 12 and a yentil 13. The temperature of the hot water jets is preferably in the range 60-70 ° C.

Duscharna av varma metallpartiklar, som astadkommits medelst varmvattenstralarna, falla i en. tank 14 med vatten, som halles vid en hog temperatur, foretradesvis 80-90° C, men ej Over 90-95° C, eftersom tankinneballet da kunde kastas ut. En Onskad niya. X av varmvatten i tanken uppratthalles medelst tva dammbord 15 och 16 pa motsatta andar av tanken. Bordet 16 innefattar en plat 17 fastad yid dammvaggen medelst bultar 18, som stracka sig genom vertikala slitsar 19 i platen, som salunda dr vertikalt installbar for att yariera dammbordets niva. En kanal 20 leder overstromningen till en avsattningstank 21, flan vilken vattnet uttommes som airmail genom en ledning 22. Ett par uppsamlingstrattar 23 och 24 nedsankta i tanken 14 oeh forbundna med ledningsparen 6 resp. 7, mottaga partiklarna, nar desamma sjunka genom vattnet. Trattarna ha oppna bottnar, som aro i linje med oyre rannor hos ett par uppatriktat lutande andlosa bandtransportorer 25 och 26, sa att partiklarna falla genom trattarna ned pa transportorerna. Sidovaggar 27 (fig. 4) hos varje tratt, 23, 24 slnta tatt in-till kanterna ay dess transportorers ovre ranna 28, och oppningsstrimlor 29 ay gummi fastade till nedre andarna av sidovaggarna berora friktionsvis toppytan hos ovre rannan 28 for att forhindra utspillning ay partiklar i sidled fran transportoren. Varje tratt har inre louvreplatar 30 atskilda fran sidoplatarna 27 for att avgransa uppatriktade gaende passager far varmvattnets avgaende uppat Iran transportorregionen, sa att det foreligger fri cirkulation has vattnet i tratten. The showers of hot metal particles, created by means of the hot water jets, fall into one. tank 14 with water, which is kept at a high temperature, preferably 80-90 ° C, but not above 90-95 ° C, since the tank inlet could then be thrown out. Onskad niya. X of hot water in the tank is maintained by means of two dust tables 15 and 16 on opposite spirits of the tank. The table 16 comprises a plate 17 fixed to the dust cradle by means of bolts 18, which extend through vertical slots 19 in the plate, which are thus vertically installable to increase the level of the dust table. A channel 20 directs the overflow to a deposition tank 21, the flange of which the water is drained as airmail through a line 22. A pair of collecting hoppers 23 and 24 submerged in the tank 14 and connected to the line pairs 6 and 6, respectively. 7, receive the particles when they sink through the water. The hoppers have open bottoms, which are in line with the grooves of a pair of upwardly inclined breathless belt conveyors 25 and 26, so that the particles fall through the hoppers onto the conveyors. Side cradles 27 (Fig. 4) of each funnel, 23, 24 are tapered to the edges of the upper groove 28 of its conveyors, and opening strips 29 of rubber attached to the lower ends of the side cradles frictionally touch the top surface of the upper groove 28 to prevent spillage. particles laterally from the conveyor. Each funnel has inner louvre plates 30 separated from the side plates 27 to define upwardly directed passages from which the hot water exits up to the Iran conveyor region, so that there is free circulation having the water in the funnel.

En tillforselledning 31 (fig. 3) for kylvatten stracker sig fran en kylvattenkalla in i trattarna 23, 24 och uttommer vid ett lage under vattennivan och ovanfor den. nedsankta Over rannan has transportoren. En eller flera av foljande tre roranordningar aro avsedda for trattarna: 1. Vid varje tratt ett par av parallella langsgaende yentilkontrollerade tillforselledningar 32, 33, som sta i f8rbindelse med en tvargfiende fOrdelnigsledning 34 vid anden av tan-ken narliggande munstyckena, och kylvatten tillfores fran en kalla till ledningen 34 medelts en pump. Uttomningsandar 32A, 33A hos riiren 32:, 33 konvergera for att rikta kon- — —3 vergerande strommar av kylvatten i riktning mot en zon 35, som befinner sig cirka halv- Tags hos trattdjupet och vid anden av tratten narliggande munstyckena och genom vilken de tunga jarnpartiklarna falla. A cooling water supply line 31 (Fig. 3) extends from a cooling water source into the hoppers 23, 24 and empties at a layer below the water level and above it. immersed Over the rannan has the conveyor. One or more of the following three rudder devices are provided for the hoppers: 1. At each hopper a pair of parallel longitudinal yentil-controlled supply lines 32, 33, which are connected to a transverse enemy distribution line 34 at the end of the tank adjacent the nozzles, and cooling water is supplied from the hopper a cold to line 34 by means of a pump. Exhaust ducts 32A, 33A of the pipe 32 :, 33 converge to direct converging streams of cooling water in the direction of a zone 35 which is located approximately halfway at the depth of the hopper and at the spirit of the hopper adjacent the nozzles and through which they the heavy iron particles fall.

Vid varje tratt ett par parallella, ventilkontrollerade tillforselledningar 36 och 37 oppna fran fordelningsledningen 34 och som uttomma parallella stralar av kylvatten i tratten 24 for att bilda en kylningszon som i 1. ovan. At each funnel a pair of parallel, valve-controlled supply lines 36 and 37 open from the distribution line 34 and as empty parallel jets of cooling water in the funnel 24 to form a cooling zone as in 1. above.

For betjaning av bada trattarna sta Ire parallella, ventilkontrollerade tillfOrselled ningar 38 i forbindelse med fOrdelningsledningen 34 och luta uppat langs sidan av trattens yttre sidovaggar. Motsatta serier av grenledningar 39 och 40 utskjuta genom trattens sidovaggar for att utmynna i trattarnavid stallen omedelbart ovanfor transportorerna. I ett alternativ, visat av fig. 4, ha tillforselledningar 41 grenledningar 42, som stracka sig nedatriktat bakom louvreplatarna 30 och utmynna omedelbart ova.nfOr transportoren. To operate both hoppers, stand parallel, valve-controlled supply lines 38 in communication with the distribution line 34 and inclined upwardly along the side of the outer side cradles of the hopper. Opposite series of manifolds 39 and 40 project through the side cradles of the hopper to open into the hopper at the stables immediately above the conveyors. In an alternative, shown in Fig. 4, supply lines 41 have branch lines 42 which extend downwardly behind the louvre plates 30 and open immediately above the conveyor.

Tillsatsen av kylvatten till tanken kan varieras for att passa variationer i temperatur hos tankens vatten, som kunna uppsta under anordningens drift, varvid sadana temperaturvariationer registreras exempelvis av en automatisk temperaturskrivare. Salunda anvandes kylvattnet fOr att forhindra vattnet i tanken fran att bli alltf8r varmt (tempera- turen far ej overstiga 9095° C) och tjanar aven till att astadkomma en kylningszon cirka halvvags av trattdjupet och/eller omedelbart ovanfar transportoren och vid anden av tratten n'arliggande munstyckena, sa att de tyngre partiklarna, som sjunka genom zonerna, kylas tillrackligt for att forhindra en branning av transportorens band. The addition of cooling water to the tank can be varied to suit variations in temperature of the tank water, which may arise during the operation of the device, such temperature variations being registered, for example, by an automatic temperature recorder. Thus, the cooling water is used to prevent the water in the tank from getting too hot (the temperature must not exceed 9095 ° C) and also serves to provide a cooling zone approximately halfway up the funnel depth and / or immediately above the conveyor and at the spirit of the funnel n ' adjacent nozzles, so that the heavier particles, which sink through the zones, are cooled sufficiently to prevent a burning of the conveyor belts.

Transport8rerna 25, 26 are motordrivna medelst vaxlar med variabla hastigheter, sa att hastigheten., med vilken partiklarna passerar genom vattnet pa den nedsankta transportorens bana, noggrant regleras. The conveyors 25, 26 are motor-driven by means of variable speed gears, so that the speed at which the particles pass through the water on the path of the submerged conveyor is carefully controlled.

Genom kontrollering av kylvattenstromningen och/eller transportorens hastighet Or det mojligt att kontrollera kylningen av granulerna och att tillfOrsakra att tillracklig varme kvarhalles av granulerna, som lamna tan-ken, Mr att torka granulerna under fOrloppet av efterfoljande handhavande. By controlling the cooling water flow and / or the speed of the conveyor, it is possible to control the cooling of the granules and to cause sufficient heat to be retained by the granules, which leave the tank, etc. to dry the granules during the course of subsequent handling.

Eftersom metallgranulerna, som satta sig pa de nedsankta transportorerna, kvarhalla en del air varmet, framstallas transportiirhanden av ett varmebestandigt material, exempelvis ett lampligt gummi, eller sta.' av en speciellt vavd maskkonstruktion. Since the metal granules which have settled on the immersed conveyors retain some of the air heat, the conveyor hand is made of a heat-resistant material, for example a lamp rubber, or steel. ' of a specially woven mesh construction.

Granulerna levereras av transportorerna 25, 26 bort fran tanken till en lamplig anordning for vag eller jarnvagsbelastning, eller for direkt bandmatning till lagringsbingar eller f8r lagring i hogar pa marken. The granules are delivered by the conveyors 25, 26 away from the tank to a suitable device for weighing or railway loading, or for direct belt feeding to storage bins or for storage in mounds on the ground.

Medan ett flertal olika konstruktioner av spruthuvuden aro tankbara, kunna goda re- sultat erhallas med spruthuvuden, vilka Tart och ett innehalla 7 horisontala rader med 12,7 mm diameter spruthal, varvid raderna lunealternerande 13 och 12 spruthal. Dessa spruthuvuden arbeta vid 0,05 kg/cm2 matt i ledning 1220 mm fran huvudena. For detta speciella tillstand Or bandet av smart jarn 165 mm brett och 9,5 mm tjockt, men storre bandbredder anvandas vid anlaggningar f8r stiirre kapacitet. Trattarna Oro minst 3350 mm .djupa for att giva tillrackligt djup och en reserv av vatten fOr att kunna bevara de hoga vattentemperaturerna. While a number of different constructions of spray heads are conceivable, good results can be obtained with spray heads, which Tart and one contain 7 horizontal rows of 12.7 mm diameter spray hall, the rows of whims alternating 13 and 12 spray halls. These spray heads work at 0.05 kg / cm2 matt in a line 1220 mm from the heads. For this special condition, the strip of smart iron is 165 mm wide and 9.5 mm thick, but larger strip widths are used in installations for larger capacities. The funnels are at least 3350 mm deep to provide sufficient depth and a reserve of water to be able to maintain the high water temperatures.

Vid apparaturens drift, for att erhalla en pro- dukt med hog volymvikt och stor medelkornstorlek, Mlles temperaturen hos de smalta jarnbanden sa hog som mojligt och stromningshastigheten hos det smalta jarnet minskas nagot, om det uppstax ett temperaturfall hos jarnet. Med small jam n yid 1300° C salunda en minimum strOmningshastighet av smalt jam av c:a 0,22 ton/minut per 25,4 mm bredd hos banden och ,darigenom astadkommes sfariska partiklar av c :a 8 mm diameter med en volymtathet (volymvikt) av c:a 4,4 kg/dm2/kubikfot. Med smalt jam vid 1150° C erfordras en minskning av stromningens hastighet till storleksordningen 0,195 ton/min/tum. During the operation of the apparatus, in order to obtain a product with a high bulk density and a large average grain size, the temperature of the narrow iron strips is as high as possible and the flow rate of the narrow iron is somewhat reduced if a temperature drop occurs in the iron. With a small jam n yid 1300 ° C a minimum flow rate of narrow jam of about 0.22 tons / minute per 25.4 mm width of the belts and, thereby, spherical particles of about 8 mm diameter with a volume density are provided ( volume weight) of about 4.4 kg / dm2 / cubic foot. With narrow jam at 1150 ° C, a reduction of the flow rate to the order of 0.195 tons / min / inch is required.

Fig. 9 visar en forenkling ay anordningen. Fig. 9 shows a simplification of the device.

Den mamma duschen av metallpartiklar, som bildas av de varma vattenstralarna fran huvudet 10, falla i en varmvattentank 43 framstalld av betong och med en inre yta 44 lutande nedatriktat och inat Iran en overstrOmningskant belagen under huvudet 10. Den granulerade metallen tenderar salunda att rutscha nedfor ytan 44 och hopsamlas i en hog 46 pa botten av tanken 43. En roranordning 47 fordelad Over den lutande ytan 44 och skyddad av platar 48, som tacka ytan, har straloppningar dari for uttomning ay kontrollerade mangder kylvatten &Am en. Ulla i tanken for att halla varmvattnet i tanken vid onskad temperatur. Granulerna lyftas fran tanken satsvis, dvs. pA..ett icke kontinuerligt salt medelst en gripskopa (icke visad), som Or upphangd i en traverskran 49 och som uttommer granulerna i ett fordon 50. The mother shower of metal particles, formed by the hot water jets from the head 10, falls into a hot water tank 43 made of concrete and with an inner surface 44 sloping downwards and inside Iran a flood edge covered under the head 10. The granulated metal thus tends to slide down surface 44 and is collected in a heap 46 at the bottom of the tank 43. A rudder device 47 distributed over the inclined surface 44 and protected by plates 48, which thank the surface, has jet openings therein for emptying controlled amounts of cooling water & Am en. Wool in the tank to keep the hot water in the tank at the desired temperature. The granules are lifted from the tank batchwise, i.e. a non-continuous salt by means of a grab bucket (not shown), which Or is suspended in a overhead crane 49 and which empties the granules in a vehicle 50.

Alternativt ersattes gripskopan av en elckt- romagnet 51, i vilket fall tanken 43 bestar ay ett par av sida yid sida liggande rum (icke visade) lampliga att alternerande mojliggiira en preliminar dranering av vatten Iran rum-met, som skall tommas medelst elektromagneten. Alternatively, the grab bucket was replaced by an electromagnet 51, in which case the tank 43 consists of a pair of side-by-side spaces (not shown) suitable for alternating the possibility of a preliminary drainage of water from the room to be emptied by the electromagnet.

Det har visat sig, att varmvattenbehand- hagden smalta metallen resulterar i klot- formiga granuler, varigenom desamma bli lampliga for handhavande, medan kallvattenbehandling av den smalta metallen resulterar i granuler, som Oro skrovliga och kantiga. It has been found that the hot water treatment of the molten metal results in globular granules, thereby making them suitable for handling, while cold water treatment of the molten metal results in granules which are rough and angular.

Dessutom har den med varmt vatten framstallda produkter en volymvikt av 4,73 kg/ 4- - dm3 mot endast 3,75 kg/dm3 for en med kallvatten framstalld produkt. In addition, the products produced with hot water have a volume weight of 4.73 kg / 4- - dm3 against only 3.75 kg / dm3 for a product produced with cold water.

Det Sr ä'c-en overraskande, att siktstorleken hos varmvatten-framstallda granuler gene-relit ãr stOrre an den hos kallvatten-framstallda granuler i avseende pa passage genom en sikt och att varmvatten-framstallda granuler aro mera likformiga i storlek an kallvatten-framstallda granuler. It is surprising that the sieve size of hot water-produced granules is generally larger than that of cold-water-produced granules with respect to passage through a sieve and that hot-water-produced granules are more uniform in size than cold-water-produced granules. granules.

Claims

Patent claim:

Set to granulate narrow jam, slag or steel material, directing a flow of narrow material through an air atmosphere, subjecting the narrow material stream to the action of water jets to form a shower of hot material particles, and collecting the falling particles in a vessel containing water, in which the particles fall and through which they sink, characterized in that the water which forms the jets is hot and that the water in the collecting vessel is hot, the heat of the water resulting in the formation of substantially spheroidal jams, slag. or steel granules with relatively high volume weight.

2. Set according to claim 1, characterized in that the temperature of the water jets Jigger in the range of about 70 ° C and that the temperature of the water in the collecting vessel Jigger in the range of about 80-95 ° C

Salt according to claim 1 or 2, characterized in that a predetermined level of the water in the collecting vessel is maintained by allowing the water to overflow at the predetermined level, and in carrying out a control of the water temperature in the collecting vessel by adding additional controlled amounts to cooling water. the man from a cooling water supply.

Device for carrying out the set according to patent claims 1-3, characterized in that the same comprises guide devices (6, 7) for directing one. flow of narrow iron, slag or steel material through an air atmosphere, a plurality of nozzles (10, 11) arranged below the conduit devices and adapted to direct jets of hot water across the narrow material flow to thereby form from it a shower of hot material particles, a vessel (14) for receiving hot water, in which the hot material particles fall and through which they sink, and a dust table (15, 16) at the edge of the vessel, which are adapted to mica a flood from the vessel at a pre-heated level, wherein means for supplying cooling water (32, 33; 36, 37; 38-40) are adapted to open into the vessel (14) and adjustable to vary the amount of cooling water supplied.

Device according to claim 4, in which the collecting vessel (14) comprises an collecting hopper (23, 24) with an open bottom and a conveyor (25, 26), the hopper Or being adapted to direct the sinking particles to and on the conveyor. , which transports the particles from the vessel, and can be characterized in that the supply means (32, 33; 36, 37) are adapted to discharge cooling water into the funnel (23, 24) about halfway at the depth of the funnel, and vici spirit of the funnel adjacent nozzles (10, 11), to produce in the funnel (23, 24) a relatively cold son, through which the heavier of the hot particles pass, when they sink in the direction of the conveyor.

Device according to claim 4, in which the collecting vessel (14) comprises an collecting funnel (23, 24) with an open bottom and a conveyor (25, 26), the funnel being adapted to direct the sinking particles to and on the conveyor , which transports the particles Iran the vessel and can be drawn therefrom, that the supply means (38-40) are adapted to discharge cooling water into the funnel at the bottom thereof and adjacent nozzles adjacent thereto (10, 11), to immediately provide in the funnel an above the upper the path of the transportOren (25, 26) relative. cold non, through which the heavier of the hot particles pass, when they sink in the direction of the conveyor.

Device according to claims 4-6, in which the collecting vessel (14) comprises a collecting hopper (23, 24) with an open bottom and a conveyor (25, 26), with the hopper adapted to direct the sinking particles to and on the conveyor, which the particles transport Iran to the cartilage and can be characterized by the fact that flexible and sealing strips (29) are arranged at the bottom (bottom) of sides (27) of the collecting funnel (23, 24) and frictionally touch the top surface of the upper web of the conveyor (25, 26). to prevent particles from spreading on it laterally.

Device according to claims 4-7, characterized in that the dam tables (15, 16) comprise a dam table cradle (16) at the edge of the vessel and a plate (17) mounted on the dam table cradle (16) for a vertical adjustment of the flood level. Request publications: Patentskrifter friin Sverige 161 401; Great Britain 361 383 and 800 070.