WO1997020624A1 - Device for granulating molten metals and slags - Google Patents

Device for granulating molten metals and slags Download PDF

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Publication number
WO1997020624A1
WO1997020624A1 PCT/NO1996/000283 NO9600283W WO9720624A1 WO 1997020624 A1 WO1997020624 A1 WO 1997020624A1 NO 9600283 W NO9600283 W NO 9600283W WO 9720624 A1 WO9720624 A1 WO 9720624A1
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WO
WIPO (PCT)
Prior art keywords
nozzles
water
launder
granulating
distribution chamber
Prior art date
Application number
PCT/NO1996/000283
Other languages
French (fr)
Inventor
Tore Anderssen
Rolf Ruud
Hans Skretting
Original Assignee
Elkem Asa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elkem Asa filed Critical Elkem Asa
Publication of WO1997020624A1 publication Critical patent/WO1997020624A1/en

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • 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
    • B22F9/06—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
    • B22F2009/0804—Dispersion in or on liquid, other than with sieves
    • 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
    • C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
    • 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
    • C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising 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
    • C21B2400/05—Apparatus features
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/072—Tanks to collect the slag, e.g. water tank

Definitions

  • the present invention relates to a device for water granulation of molten metal, metal alloys and slag.
  • German patent No. 4122190 it is described a method for granulating of molten silicon where molten silicon is granulated by having a stream of molten silicon passing through a gas which is ejected from a nozzle and a water stream arranged below the air nozzle, whereby the produced granules by means of the water stream are transferred along a launder to a bin for final cooling.
  • German patent No. 4122190 it is described a method for granulating of molten silicon where molten silicon is granulated by having a stream of molten silicon passing through a gas which is ejected from a nozzle and a water stream arranged below the air nozzle, whereby the produced granules by means of the water stream are transferred along a launder to a bin for final cooling.
  • the design of the water nozzle is not shown or described.
  • a device for water granulation of metals, metal alloys and slag by means of a water beam in a granulating launder whereby efficient granulation is obtained and whereby the risk of explosion is substantially reduced.
  • the present invention relates to a device for water granulation of molten metal, metal alloys and slag in a granulating launder where a stream of molten metal, metal alloy or slag is granulated in the granulating launder by means of a water stream, said invention being characterized in that a water supply device is arranged at the inlet end of the granulation launder which water supply device comprises a water distribution chamber having a plurality of water nozzles extending from the side of the water distribution chamber facing the granulating launder, which nozzles have oval outlet openings and are arranged in such a way that when water is supplied to the nozzles, it will be formed a continuous water stream having a substantially constant linear velocity over the cross-section of the granulating launder.
  • the nozzles are arranged in a least three horizontal levels in the side wall of the water distribution chamber, with at least two nozzles in each horizontal level and where the nozzles in the upper horizontal level are arranged at a substantially equal horizontal distance, while each of the nozzles in each of the lower horizontal levels, except for the outermost nozzles, are arranged between two of the nozzles in at least one of the upper horizontal levels.
  • the outlet openings of the nozzles are preferably arranged in such a way that the bigger diameter in the oval outlet openings of the nozzles is substantially horizontal, except for the outermost nozzles in each level above the lowermost level, where the biggest diameter in the oval outlet openings of the nozzles are arranged substantially vertically.
  • the ratio between the biggest and smallest diameter in the outlet openings of the nozzles is between 1.5 and 6, preferably between 3 and 5.
  • the nozzles are preferably connected in threaded borings in the water distribution chamber, but can also be connected to the water distribution chamber by welding or the like.
  • water nozzles shaped and arranged in accordance with the present invention gives a flow of water in the area where the molten metal or slag stream hits the water flow, which prevents the metal or slag stream from penetrating through the water flow without being granulated.
  • the outermost arranged nozzles in each level together with the lowermost arranged nozzles gives a flow of water along the walls and the bottom of the granulating launder preventing accumulation of partly solidified granules on the walls and the bottom of the granulating launder, thereby substantially reducing the risk of explosion.
  • the device according to the present invention can be used for granulation of a number of metals such as silicon and iron, metal alloys such as ferrosilicon, ferromanganese, silicomanganese, ferrochromium and ferronickel and different kind of slags such as titanoferrous slag, pig iron slag, ferronickel slag, ferromanganese slag and silicomanganese slag. It has further been found that by use of the present invention it is formed a very low amount of undersized particles during the granulation. The yield of granules having a saleable size is thus very high. It has further been found that silicon granulated using the device of the present invention, is especially well suited for the use in the production of organochlorosilanes using the so-called "Direct Reaction" where silicon is reacted with methylchloride.
  • Figure 1 shows a granulating apparatus seen from the side
  • Figure 2 shows the granulating apparatus of figure 1 seen from above
  • Figure 3 shows the water distribution chamber according to the present invention
  • Figure 4 shows a view of the water distribution chamber taken along line I - I in Figure 3.
  • FIGs 1 and 2 there are shown a water granulating apparatus for molten metal, metal alloys and slags comprising a granulating launder 1.
  • a water distribution chamber 3 In the inlet end 2 of the granulating launder 1 , there is arranged a water distribution chamber 3 according to the present invention. The water distribution chamber 3 will be further described later.
  • the collection bin 5 has an inner partition wall 6 and an overflow 7 for water.
  • the granulation launder 1 is arranged in such a way that it has a small downward inclination from the inlet end 2 of the granulation launder 1 to the outlet end 4 of the granulation launder 1.
  • the water granulation launder 1 preferably has a rectangular cross-section with a flat bottom and vertical walls and is preferably made from steel.
  • an inclined launder 8 for molten metal or slag which is poured from a metallurgical container 9 such as a ladle or the like.
  • molten metal or slag is poured from the container 9 onto the launder 8 in such a way that it is formed a continuous, substantial vertical stream 10 of molten metal or slag from the lower end of the launder 8 and into the granulating launder 1.
  • the stream 10 is hit by water beams from nozzles 25 in the water distribution chamber 3 whereby the metal or slag stream is formed into granules which are transported through the granulating launder 1 to the collection bin 5 by means of the water flow.
  • the final cooling of the produced granules takes place in the collection bin 5.
  • the water distribution chamber 3 comprises as shown in Figures 3 and 4 a cylinder shaped pipe 30 arranged with its longitudinal axis pe ⁇ endicular to the longitudinal axis of the granulation launder 1 at the inlet end 2 of the granulation launder 1.
  • water distribution chamber 3 shown in Figures 3 and 4 has a cylinder-shaped cross-section water distribution chambers having other cross- sections, such as rectangular cross-section, can be used.
  • the water distribution chamber 3 has an inlet opening 21 for water connected to a water source (not shown) capable of delivering water at a sufficient pressure.
  • the other end of the water distribution chamber 3 is closed by a flange 22 connected by a plurality of bolts 3.
  • the flange 22 can be welded to the end of the water distribution chamber 3.
  • a pressure gauge 24 for measuring the water pressure in the water distribution chamber 3 is preferably arranged in the flenge 22.
  • the water nozzles 25 In the side wall of the water distribution chamber 3 facing the granulation launder 1 , there are arranged a plurality of water nozzles 25. As shown in Figure 4, the water nozzles 25 extend somewhat from the wall of the water distribution chamber 3 and can for example be made from steel pipes which are connected in threaded borings in the water distribution chamber 3. The nozzles 25 have oval formed outlet openings as shown in Figure 3.
  • the water nozzles 25 are arranged in a number of horizontal levels, with at least two nozzles 25 at each horizontal level.
  • the outmost nozzles 25 in each horizontal level except for the lowermost level, are arranged in such a way that the biggest diameter in the outlet opening of the nozzles 25 is oriented in substantial vertical direction, while the remaining nozzles 25 are arranged in such a way that the biggest diameter in the outlet opening of the nozzles 25 is oriented in substantial horizontal direction.
  • the nozzles 25 arranged in the upper horizontal level are arranged at a substantially equal horizontal distance while the nozzles 25 in the lower levels 0 are arranged in such a way that each of the nozzles 25 are arranged between two of the nozzles 25 in at least one of the above levels.
  • All nozzles 25 have substantially the same outlet cross-section, and as all the nozzles are connected to the water distribution chamber 3, the amount of water delivered through each of the nozzles 25 will be substantially the same.
  • the arrangement of nozzles shown in Figures 3 and 4 will provide a substantially continuous water flow having substantially the same linear velocity over the cross-section of the granulating launder 1.
  • Example 1 Two tests for granulating metallurgical grade silicon were made. In the tests metallurgical silicon was melted in an induction furnace and granulated in the granulating apparatus of the present invention shown in the Figures. The nozzles in the water distribution chamber had a radio between the biggest and smallest diameter of 4. In both tests the water pressure in the water distribution chamber was 2.6 bar. The granulation parameters and the results are shown in Table 1.
  • Alloy Water Granulation Weight of Amount of Amount of pressure time, sec. produced alloy water per bar granules supplied ton alloy kg kg/min

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to a device for water granulation of molten metal, metal alloys and slag where a stream of molten metal, metal alloy or slag is granulated in a granulating launder (1) by means of a water stream. A water supply device is arranged at the inlet end (2) of the granulation launder (1) which water supply device comprises a water distribution chamber (3) having a plurality of water nozzles (25) extending from the side of the water distribution chamber (3) facing the granulating launder (1). The nozzles (25) have oval outlet openings and are arranged in such a way that when water is supplied to the nozzles (25), it will be formed a continuous water stream having a substantially constant linear velocity over the cross section of the granulating launder (1).

Description

Title of invention
Device for granulating molten metals and slags.
Field of invention The present invention relates to a device for water granulation of molten metal, metal alloys and slag.
Background art
Processes and devices for water granulation of molten metals, metal alloys and slag are known. In German patent No. 4122190 it is described a method for granulating of molten silicon where molten silicon is granulated by having a stream of molten silicon passing through a gas which is ejected from a nozzle and a water stream arranged below the air nozzle, whereby the produced granules by means of the water stream are transferred along a launder to a bin for final cooling. In the German patent the design of the water nozzle is not shown or described.
By water granulation of molten metal or slag where a molten stream of metal or slag is granulated by means of a water stream there exists a risk of explotion. The reasons for such explotions are not quite known. It seems, however, likely to assume that inclusion of water in partly solidified metal or slag can be a reason for such explosions. Further, the metal can to a certain degree be oxidized by the water and hydrogen can thereby be released and react with oxygen in the air and may in some instances give rise to gas explosions. It has been found that the risk of explosion is high if the molten metal or slag penetrates through the water stream without being properly granulated and accumulates on the bottom or on the walls of the granulating launder.
Disclosure of invention
By the present invention it is provided a device for water granulation of metals, metal alloys and slag by means of a water beam in a granulating launder, whereby efficient granulation is obtained and whereby the risk of explosion is substantially reduced.
Accordingly, the present invention relates to a device for water granulation of molten metal, metal alloys and slag in a granulating launder where a stream of molten metal, metal alloy or slag is granulated in the granulating launder by means of a water stream, said invention being characterized in that a water supply device is arranged at the inlet end of the granulation launder which water supply device comprises a water distribution chamber having a plurality of water nozzles extending from the side of the water distribution chamber facing the granulating launder, which nozzles have oval outlet openings and are arranged in such a way that when water is supplied to the nozzles, it will be formed a continuous water stream having a substantially constant linear velocity over the cross-section of the granulating launder.
Preferably, the nozzles are arranged in a least three horizontal levels in the side wall of the water distribution chamber, with at least two nozzles in each horizontal level and where the nozzles in the upper horizontal level are arranged at a substantially equal horizontal distance, while each of the nozzles in each of the lower horizontal levels, except for the outermost nozzles, are arranged between two of the nozzles in at least one of the upper horizontal levels.
The outlet openings of the nozzles are preferably arranged in such a way that the bigger diameter in the oval outlet openings of the nozzles is substantially horizontal, except for the outermost nozzles in each level above the lowermost level, where the biggest diameter in the oval outlet openings of the nozzles are arranged substantially vertically.
According to a preferred embodiment the ratio between the biggest and smallest diameter in the outlet openings of the nozzles is between 1.5 and 6, preferably between 3 and 5. The nozzles are preferably connected in threaded borings in the water distribution chamber, but can also be connected to the water distribution chamber by welding or the like.
Tests have shown that water nozzles shaped and arranged in accordance with the present invention gives a flow of water in the area where the molten metal or slag stream hits the water flow, which prevents the metal or slag stream from penetrating through the water flow without being granulated. Further, the outermost arranged nozzles in each level together with the lowermost arranged nozzles, gives a flow of water along the walls and the bottom of the granulating launder preventing accumulation of partly solidified granules on the walls and the bottom of the granulating launder, thereby substantially reducing the risk of explosion.
The device according to the present invention can be used for granulation of a number of metals such as silicon and iron, metal alloys such as ferrosilicon, ferromanganese, silicomanganese, ferrochromium and ferronickel and different kind of slags such as titanoferrous slag, pig iron slag, ferronickel slag, ferromanganese slag and silicomanganese slag. It has further been found that by use of the present invention it is formed a very low amount of undersized particles during the granulation. The yield of granules having a saleable size is thus very high. It has further been found that silicon granulated using the device of the present invention, is especially well suited for the use in the production of organochlorosilanes using the so-called "Direct Reaction" where silicon is reacted with methylchloride.
Brief description of the drawings
Figure 1 shows a granulating apparatus seen from the side,
Figure 2 shows the granulating apparatus of figure 1 seen from above,
Figure 3 shows the water distribution chamber according to the present invention, and Figure 4 shows a view of the water distribution chamber taken along line I - I in Figure 3.
Detailed description of the invention
In Figures 1 and 2 there are shown a water granulating apparatus for molten metal, metal alloys and slags comprising a granulating launder 1. In the inlet end 2 of the granulating launder 1 , there is arranged a water distribution chamber 3 according to the present invention. The water distribution chamber 3 will be further described later. Below the outlet end 4 of the granulating launder 1 there is arranged a collection bin 5 for produced granules. The collection bin 5 has an inner partition wall 6 and an overflow 7 for water. The granulation launder 1 is arranged in such a way that it has a small downward inclination from the inlet end 2 of the granulation launder 1 to the outlet end 4 of the granulation launder 1. The water granulation launder 1 preferably has a rectangular cross-section with a flat bottom and vertical walls and is preferably made from steel.
At the inlet end 2 of the granulation launder 1 there is arranged an inclined launder 8 for molten metal or slag which is poured from a metallurgical container 9 such as a ladle or the like. Upon granulating, molten metal or slag is poured from the container 9 onto the launder 8 in such a way that it is formed a continuous, substantial vertical stream 10 of molten metal or slag from the lower end of the launder 8 and into the granulating launder 1. The stream 10 is hit by water beams from nozzles 25 in the water distribution chamber 3 whereby the metal or slag stream is formed into granules which are transported through the granulating launder 1 to the collection bin 5 by means of the water flow. The final cooling of the produced granules takes place in the collection bin 5.
The water distribution chamber 3 according to the present invention comprises as shown in Figures 3 and 4 a cylinder shaped pipe 30 arranged with its longitudinal axis peφendicular to the longitudinal axis of the granulation launder 1 at the inlet end 2 of the granulation launder 1.
Even if the water distribution chamber 3 shown in Figures 3 and 4 has a cylinder-shaped cross-section water distribution chambers having other cross- sections, such as rectangular cross-section, can be used.
The water distribution chamber 3 has an inlet opening 21 for water connected to a water source (not shown) capable of delivering water at a sufficient pressure. The other end of the water distribution chamber 3 is closed by a flange 22 connected by a plurality of bolts 3. Alternatively the flange 22 can be welded to the end of the water distribution chamber 3. A pressure gauge 24 for measuring the water pressure in the water distribution chamber 3 is preferably arranged in the flenge 22.
In the side wall of the water distribution chamber 3 facing the granulation launder 1 , there are arranged a plurality of water nozzles 25. As shown in Figure 4, the water nozzles 25 extend somewhat from the wall of the water distribution chamber 3 and can for example be made from steel pipes which are connected in threaded borings in the water distribution chamber 3. The nozzles 25 have oval formed outlet openings as shown in Figure 3.
The water nozzles 25 are arranged in a number of horizontal levels, with at least two nozzles 25 at each horizontal level. The outmost nozzles 25 in each horizontal level except for the lowermost level, are arranged in such a way that the biggest diameter in the outlet opening of the nozzles 25 is oriented in substantial vertical direction, while the remaining nozzles 25 are arranged in such a way that the biggest diameter in the outlet opening of the nozzles 25 is oriented in substantial horizontal direction.
The nozzles 25 arranged in the upper horizontal level are arranged at a substantially equal horizontal distance while the nozzles 25 in the lower levels 0 are arranged in such a way that each of the nozzles 25 are arranged between two of the nozzles 25 in at least one of the above levels.
All nozzles 25 have substantially the same outlet cross-section, and as all the nozzles are connected to the water distribution chamber 3, the amount of water delivered through each of the nozzles 25 will be substantially the same. The arrangement of nozzles shown in Figures 3 and 4 will provide a substantially continuous water flow having substantially the same linear velocity over the cross-section of the granulating launder 1.
Below some examples for granulating different metals, metal alloys and slags in the device according to the present invention are given.
Example 1 Two tests for granulating metallurgical grade silicon were made. In the tests metallurgical silicon was melted in an induction furnace and granulated in the granulating apparatus of the present invention shown in the Figures. The nozzles in the water distribution chamber had a radio between the biggest and smallest diameter of 4. In both tests the water pressure in the water distribution chamber was 2.6 bar. The granulation parameters and the results are shown in Table 1.
TABLE 1
Granulation time Weight of produced Amount of silicon Amount of water Granule seconds granules supplied in m3 per ton size kg kg/min silicon mm
109 48.5 26.7 74.9 0.3 - 2.0
78 77.5 59.6 33.6 0.3 - 2.0
Both test runs gave a product with very little amount of undersized material. During the test runs no indication of explotion was observed. Example 2
One test was run granulating 75 % ferrosilicon having a low Al content. The alloy was melted in an induction furnace and granulated in the granulation apparatus according to the present invention. The water pressure in the water distribution chamber was 2.6 bar and ferrosilicon was supplied at a rate of 46.2 kg/min. for 88 seconds. The amount of water supplied was 43.3 m3 per. ton alloy supplied. It was produced 68 kg of granules having a particle size between 0.5 and 3 mm. No indication of explotion was observed.
Example 3
One test was run granulating silicomanganese and one test was run granulating medium carbon ferromanganese. The alloys were melted in an induction furnace and granulated in the apparatus according to the invention. The water pressure in the water distribution chamber was 2.6 bar. The granulation parameters and the results are shown in Table 2.
TABLE 2
Alloy Water Granulation Weight of Amount of Amount of pressure time, sec. produced alloy water per bar granules supplied ton alloy kg kg/min
Silico¬ 2.6 82 130 111.5 20.9 manganese
MC Ferro¬ 2.6 172 125 43.7 45.8 manganese
When granulating silicomanganese it was obtained granules having a particle size between 0.2 and 3 mm, while the particle size when granulating ferromanganese was between 0.2 and 0.5 mm. In both test runs the amount of particles having a particle size below 0.2 mm was very low. No indications of explosion was observed. Example 4
One test was run with granulating of titanoferrous slag containing 85 % by weight of Ti02 Molten slag was granulated in the apparatus according to the invention. The pressure in the water distribution chamber was 2.2 bar. During 288 seconds it was granulated 338 kg slag using an amount of water of 28.4 m3/ton slag granulated. The produced granules had a particle size between 0.1 and 4 mm. No indication of explositon was observed during the granulation process.

Claims

1. Device for water granulation of molten metal, metal alloys and slag in a granulating launder (1 ) where a stream of molten metal, metal alloy or slag is granulated in the granulating launder (1) by means of a water stream, characterized in that a water supply device is arranged at the inlet end (2) of the granulation launder (1) which water supply device comprises a water distribution chamber (3) having a plurality of water nozzles (25) extending from the side of the water distribution chamber (3) facing the granulating launder (1), which nozzles (25) have oval outlet openings and are arranged in such a way that when water is supplied to the nozzles (25), it will be formed a continuous water stream having a substantially constant linear velocity over the cross-section of the granulating launder (1).
2. Device according to claim 1, ch a racte ri zed i n that the nozzles (25) are arranged in a least three horizontal levels in the side wall of the water distribution chamber (3), with at least two nozzles (25) in each horizontal level and where the nozzles (25) in the upper horizontal level are arranged at a substantially equal horizontal distance, while each of the nozzles (25) in each of the lower horizontal levels, except for the outermost nozzles (25), are arranged between two of the nozzles (25) in at least one of the upper horizontal levels.
3. Device according to claim 1 or2, characterized in that the outlet openings of the nozzles (25) are arranged in such a way that the bigger diameter in the oval outlet openings of the nozzles (25) is substantially horizontal, except for the outermost nozzles (25) in each level above the lowermost level, where the biggest diameter in the oval outlet openings of the nozzles (25) are arranged substantially vertically.
4. Device according to claims 1 -3, characterized in that the ratio between the biggest and smallest diameter in the outlet openings of the nozzles (25) is between 1.5 and 6.
5. Device according to claim 4, characterized in that the ratio between the biggest and smallest diameter in the outlet openings of the nozzles (25) is between 3 and 5.
6. Device according to claims 1 -5, characterized in that the nozzles (25) are connected in threaded borings in the water distribution chamber (3).
AMENDED CLAIMS
[received by the International Bureau on 2 May 1997 (02.05.97); original claim 1 amended; remaining claims unchanged
(1 page)]
1. Device for water granulation of molten metal, metal alloys and slag in a granulating launder (1) where a stream of molten metal, metal alloy or slag is granulated in the granulating launder (1) by means of a water stream, where a water supply device is arranged at the inlet end (2) of the granulation launder (1) which water supply device comprises a water distribution chamber (3) having a plurality of water nozzles (25) on the side of the water distribution chamber (3) facing the granulating launder (1), c h a r a c t e r i z e d i n that the nozzles (25) extend from the side of the water distribution chamber (3) and have oval outlet openings and are arranged in such a way that when water is supplied to the nozzles (25), it will be formed a continuous water stream having a substantially constant linear velocity over the cross-section of the granulating launder (1).
2. Device according to claim 1, c h a r a c t e r i z e d i n that the nozzles (25) are arranged in a least three horizontal levels in the side wall of the water distribution chamber (3), with at least two nozzles (25) in each horizontal level and where the nozzles (25) in the upper horizontal level are arranged at a substantially equal horizontal distance, while each of the nozzles (25) in each of the lower horizontal levels, except for the outermost nozzles (25), are arranged between two of the nozzles (25) in at least one of the upper horizontal levels.
3. Device according to claim 1 or 2, c h a r a c t e r i z e d i n that the outlet openings of the nozzles (25) are arranged in such a way that the bigger diameter in the oval outlet openings of the nozzles (25) is substantially horizontal, except for the outermost nozzles (25) in each level above the lowermost level, where the biggest diameter in the oval outlet openings of the nozzles (25) are arranged substantially vertically.
PCT/NO1996/000283 1995-12-07 1996-12-04 Device for granulating molten metals and slags WO1997020624A1 (en)

Applications Claiming Priority (2)

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NO954965A NO300877B1 (en) 1995-12-07 1995-12-07 Device for granulation of metal and slag
NO954965 1995-12-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6541489B1 (en) 1997-11-14 2003-04-01 G. D. Searle & Company Aromatic sulfone hydroxamic acid metalloprotease inhibitor
DE102009026076A1 (en) * 2009-06-30 2011-01-13 Schlackenaufbereitung Gmbh & Co. Kg Cooling bed for slag and method for cooling slag
US8608823B2 (en) 2008-11-04 2013-12-17 Umicore Ag & Co. Kg Apparatus and process for granulating a metal melt
CN105779013A (en) * 2016-04-19 2016-07-20 中国矿业大学(北京) Slag cooling system for coal gasification process of pressurizing mild air flow bed or fluidizing bed

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US6541489B1 (en) 1997-11-14 2003-04-01 G. D. Searle & Company Aromatic sulfone hydroxamic acid metalloprotease inhibitor
US8608823B2 (en) 2008-11-04 2013-12-17 Umicore Ag & Co. Kg Apparatus and process for granulating a metal melt
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CN105779013A (en) * 2016-04-19 2016-07-20 中国矿业大学(北京) Slag cooling system for coal gasification process of pressurizing mild air flow bed or fluidizing bed
CN105779013B (en) * 2016-04-19 2018-05-08 中国矿业大学(北京) A kind of cold slag system for pressurize gentle air flow bed or fluidized bed coal gasification process

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