Steel slag handling system and method for using same |
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| 申请号 | US3607168D | 申请日 | 1969-05-06 | 公开(公告)号 | US3607168A | 公开(公告)日 | 1971-09-21 |
| 申请人 | INT STEEL SLAG CORP; | 发明人 | GRADY JOHN J; | ||||
| 摘要 | There is disclosed herein apparatus and method for handling molten steel slag produced in a steelmaking furnace by cooling and granulating the slag on a continuous basis through interception of a stream of molten slag with a jet stream of water having particularly specified characteristics of shape, velocity and flow, and transportation of the granulated slag to a remote location as a slag/water slurry. | ||||||
| 权利要求 | 2. A method of handling molten steel slag as defined in claim 1 wherein said water/slag slurry is pumped through said conduit at a minimum velocity of about 17 feet per second. 3. A method of handling molten steel slag as defined in claim 1 further including the step of maintaining said slag/water slurry at up to about 17 percent granulated slag to water ratio for said slurry subject to about a 50 percent surge increase during transportation through said conduit. 4. A method of handling molten steel slag as defined in claim 1 further including transferring said granulated slag particles removed from said receptacle into an auxiliary receptacle; and wherein the step of transporting said granulated slag particles comprises pumping said granulated slag particles out of said auxiliary receptacle into said conduit. 5. A method of handling molten steel slag as defined in claim 1 further including the step of controlling the temperature of the granulated slag slurry being pumped into said conduit at a maximum temperature of about 180* F. to 212* F. 6. A method of handling molten steel slag comprising pouring molten steel slag into a receptacle; injecting at least one jetstream of water into said receptacle to intercept said molten steel slag and to granulate the molten slag into particles; the water stream being injected with a jet velocity of at least about 25.0 f.p.s., and at least about 400 g.p.m., for a molten slag input rate of up to about 2 tons per minute, the water stream being injected with a jet velocity of at least about 30 to 36.5 f.p.s., and at least about 500 to 600 g.p.m., for a molten slag input rate of 2 to about 4 tons per minute, the water stream being injected with a jet velocity of at least about 36.5 to 55 f.p.s., and at least about 1,200 to 1,800 g.p.m., for a slag input rate of 4 to about 7 tons per minute, and the water stream being injected with a jet velocity of at least about 55 to 61 f.p.s., and at least about 1,800 to 2,000 g.p.m., for a slag input rate of 7-8 tons per minute; maintaining water accumulating in said receptacle at a level below said jetstream while said molten steel slag is being poured into the receptacle so that the molten steel slag intercepts said jetstream above said accumulated water; removing resultant granulated slag particles from said receptacle while the granulation of the molten steel slag is in progress; and transporting the granulated slag particles away from said receptacle by pumping the same through a conduit in the form of a water/slag slurry. 7. A method of handling molten steel slag as defined in claim 6 wherein said slag/water slurry is pumped into said conduit at a maximum temperature of about 180* F. to 212* F., with a slurry velocity of at least 17 f.p.s., and with a slag to water ratio of less than approximately 17 percent, subject to about a 50 percent surge increase. 8. An apparatus for handling molten steel slag comprising: a slag granulator including a receptacle; means for feeding molten steel slag into the receptacle; means for injecting at least one jet stream of water into said receptacle so as to iNtercept said molten steel slag to granulate the molten slag into particles, said injecting means providing said water stream at a rate of at least about 400 g.p.m., per ton of molten slag input per minute, and with a jet velocity of at least about 25 f.p.s., for a molten slag input rate of up to 2 tons per minute, to at least about 55-61 f.p.s., for a slag input rate of up to about 8 tons per minute; means for maintaining water accumulating in said receptacle at a level below said jetstream while said molten steel slag is being poured into the receptacle so that the molten steel slag intercepts said jetstream above water accumulated in the receptacle; means for removing the granulated slag from said receptacle while the granulation of the molten steel slag is in progress comprising hydraulic granulated slag slurry transfer means including an auxiliary tank for receiving said granulated slag, pump means coupled to said auxiliary tank, and discharge conduit means connected to said pump means for transporting said slag to a remote location in the form of a granulated slag/water slurry. 9. An apparatus for handling molten slag comprising: a slag granulator including a receptacle; means for feeding molten slag into the receptacle; means for injecting at least one jetstream of water into said receptacle to intercept said molten slag and to granulate said slag into particles, means for maintaining water accumulating in said receptacle at a level below said jetstream while said molten slag is being poured into the receptacle so that the molten slag intercepts said jetstream above water accumulated in the receptacle; means for removing the granulated slag from said receptacle while granulation is in progress comprising hydraulic granulated slag-slurry transfer means including discharge conduit means, and pump means connected to said discharge conduit means for propelling said slag through said conduit in the form of a granulated slag/water slurry. 10. Apparatus as defined in claim 9 wherein said slag-slurry transfer means includes an auxiliary tank for receiving granulated slag, and means connecting said pump means to said auxiliary tank for removal of said slag from said tank and transportation through said conduit means. 11. An apparatus as defined in claim 9 wherein said slurry transfer means removes said water and granulated slag slurry from said granulator means at substantially the average rate of input into said granulator means of water plus slag, and wherein said slurry transfer means includes means for varying the water content of said slurry to maintain said slurry velocity of at least about 17 feet per second in said discharge conduit. 12. An apparatus as defined in claim 11, wherein said slag transfer means includes means for varying the water content of said slurry to maintain up to about 17 percent granulated slag to water ratio for said slurry subject to 50 percent surge increase thereof at said slurry velocity. 13. An apparatus as defined in claim 9 further comprising means for controlling the temperature of the granulated slag slurry fed to the inlet of said pump means to maintain said slurry at a maximum temperature of less than about 180* F. to -212* F. 14. An apparatus for handling molten steel slag comprising: a slag granulator including a receptacle; means for feeding molten steel slag into the receptacle; means for injecting at least one jetstream of water into said receptacle so as to intercept said molten steel slag to granulate the molten slag into particles, said injecting means providing said water stream at a rate of at least about 400 g.p.m., per ton of molten slag input per minute, and with a jet velocity of at least about 25 f.p.s., for a molten slag input rate of up to 2 tons per minute, to at least about 55-61 f.p.s. for a slag input rate of up to about 8 tons per minute; means for maintaining water accumulating in said rEceptacle at a level below said jetstream while said molten steel slag is being poured into the receptacle so that the molten steel slag intercepts said jetstream above water accumulated in the receptacle; means for removing the granulated slag from said receptacle while the granulation of the molten steel slag is in progress comprising hydraulic granulated slag slurry transfer means for transporting said slag away from said granulator in the form of a granulated slag/water slurry. 15. Apparatus for handling molten steel slag comprising: a slag granulator and hydraulic transfer means as defined in claim 13 wherein said injecting means provides said water jetstream at a jet velocity of at least about 25.0 f.p.s., and at least about 400 g.p.m., for a molten steel slag input rate of up to about 2 tons per minute, with a jet velocity of at least about =b 30 to 36.5 f.p.s., and at least about 500 to 600 g.p.m., for a molten steel slag input rate of 2 to about 4 =tons per minute, with a jet velocity of at least about 36.5 to 55 f.p.s., and at least about 1,200 to 1,800 g.p.m., for a molten steel slag input rate of 4 to about 7 tons per minute, and with a jet velocity of at least about 55 to 61 f.p.s., and at least about 1,800 to 2,000 g.p.m., for a molten steel slag input rate of 7-8 tons per minute. 16. Apparatus as defined in claim 9 wherein said injecting means comprises jet nozzle means extending horizontally a distance which is large compared to the vertical extent thereof. 17. An apparatus for handling molten steel slag comprising: a slag granulator and hydraulic transfer means as defined in claim 9, wherein said injecting means provides said water jetstream at a rate of at least about 400 g.p.m., per ton of molten steel slag input per minute, and with a jet velocity of at least about 25 f.p.s., for a molten steel slag input rate of up to 2 tons per minute, to at least about 55-61 f.p.s., for a molten steel slag input rate of up to about 8 =l tons per minute. 18. An apparatus as defined in claim 10 further comprising means for preventing particles exceeding a predetermined size from entering said auxiliary tank. 19. An apparatus for handling molten slag comprising: a slag granulator including a receptacle; means for feeding molten slag into the receptacle; means for injecting at least one jetstream of water into said receptacle to intercept said molten slag to granulate the molten slag into particles, an auxiliary tank coupled to said granulator receptacle; means for maintaining water accumulating in said receptacle at a level below said jetstream while said molten slag intercepts said jetstream above water accumulated in the receptacle; means for transferring said granulated slag and water to said auxiliary tank; and hydraulic transport means for transporting the granulated slag away from auxiliary tank while granulation is in progress in the form of a granulated slag/water slurry. 20. An apparatus as defined in claim 19 further comprising means for preventing particles exceeding a predetermined size from passing into said slag transfer means. 21. An apparatus for handling molten steel slag comprising: a slag granulator and hydraulic transfer means as defined in claim 13, wherein said injecting means provides said water jetstream at a rate of at least about 400 g.p.m., per ton of molten steel slag input per minute, and with a jet velocity of at least about =25 f.p.s., for a molten steel slag input rate of up to 2 tons per minute, to at least about 55-61 f.p.s., for a molten steel slag input rate of up to about 8 tons per minute. 22. Apparatus for handling molten steel slag comprising: a slag granulator and hydraulic transfer means as defined in claim 14 wherein said injecting means provides said water jetstream at a jet velocity of at least about 25.0 f.p.s., and aT least about 400 g.p.m., for a molten steel slag input rate of up to about 2 tons per minute, with a jet velocity of at least about 30 to 36.5 f.p.s., and at least about 500 to 600 g.p.m., for a molten steel slag input rate of 2 to about 4 tons per minute, with a jet velocity of at least about 36.5 to 55 f.p.s., and at least about 1,200 to 1,800 g.p.m., for a molten steel slag input rate of 4 to about 7 tons per minute, and with a jet velocity of at least about 55 to 61 f.p.s., and at least about 1,800 to 2,000 g.p.m., for a molten steel slag input rate of 7-8 tons per minute. 23. A method of handling molten slag comprising: pouring molten slag into a receptacle; injecting at least one jetstream of water into said receptacle to intercept said molten slag and to granulate the molten slag into particles; maintaining water accumulating in said receptacle at a level below said jetstream while said molten slag is being poured into the receptacle so that the molten slag intercepts said jetstream above said accumulated water; removing resultant granulated slag particles from said receptacle while the granulation of the molten slag is in progress; and transporting the granulated slag particles away from said receptacle by pumping the same through a conduit in the form of a water/slag slurry. 24. An apparatus as defined in claim 19 wherein said hydraulic transfer means removes said water and granulated slag slurry from said granulator means at substantially the average rate of input into said granulator means of water plus slag, and wherein said slurry transfer means includes means for varying the water content of said slurry to maintain a slurry velocity of at least about 17 feet per second during transport away from said granulator. 25. An apparatus as defined in claim 24 wherein said hydraulic transfer means includes means for varying the water content of said slurry to maintain up to about 17 percent granulated slag to water ratio for said slurry subject to 50 percent surge increase thereof at said slurry velocity. 26. An apparatus as defined in claim 25 further comprising means for controlling the temperature of the granulated slag slurry to maintain said slurry at a maximum temperature of less than about 180* F. to -212* F. |
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