EP1285095A1 - Method for conveying away slags, especially desulfurization slags - Google Patents
Method for conveying away slags, especially desulfurization slagsInfo
- Publication number
- EP1285095A1 EP1285095A1 EP01947178A EP01947178A EP1285095A1 EP 1285095 A1 EP1285095 A1 EP 1285095A1 EP 01947178 A EP01947178 A EP 01947178A EP 01947178 A EP01947178 A EP 01947178A EP 1285095 A1 EP1285095 A1 EP 1285095A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slag
- container
- containers
- cooled
- slags
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/42—Sulphur removal
-
- 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
- C21B2400/06—Conveyors on which slag is cooled
Definitions
- the invention relates to a method for the removal of slags, in particular desulphurization slags, which form on pig iron or steel slags.
- the slag that forms on the surface of the hot metal melt is drawn off into large slag pails or slag boxes by means of a slag scraper.
- the slag buckets are cooled for several days and then soaked for at least 2-3 days.
- the slag is cooled down using the cooling medium water so that emissions or deflagrations do not occur when it is dumped.
- the temperature of the cooled down slag should be less than 400 ° C to avoid odor nuisance caused by the formation of H 2 S gas.
- a disadvantage of the known method is the long waiting time until the slag cools down and the provision of a large number of slag buckets in circulation, including the transport logistics required for this.
- the object of the invention is to provide a method for the removal of slags which form on pig iron or steel melts, in particular desulfurization slag, which does not show the disadvantages described.
- the amount of slag withdrawn is subdivided into partial amounts, the amount of partial slag withdrawn in each case being assigned only to a container which moves past the deslagging point in time. Then the filled slag quantity continuously cooled along a specified distance and then thrown away.
- the proposed method has the advantage that the removal of the slag that has been drawn off is carried out in timed portions and that this amount can be cooled in a much shorter time.
- a so-called trough conveyor consisting of a multiplicity of containers or troughs of identical design, which are arranged all around.
- the containers which can be attached to one another can form an endless train, the containers being provided with wheels which roll on a closed rail belt.
- the containers are arranged on a separate circulating endless belt.
- they are detachably attached to the endless belt. With each stroke of the slag scraping, the endless belt or the container train sets a fixed one
- the endless belt or the container train After filling, the endless belt or the container train passes through a cooling section and, after the cooled slag has been discharged, conveys the empty containers back to the filling area. This eliminates the complex transport logistics of many slag buckets in circulation.
- Solid part fills up. This solid is preferably ground, cold slag.
- each container When the containers are arranged on the endless belt, spaces are formed between the successive containers. So that no hot slag can drip into these spaces, each container has a cover plate covering this space.
- Figure 1 as a schematic diagram of a trough conveyor designed according to the invention
- FIG. 1 shows a schematic diagram of a trough conveyor 1 designed according to the invention. It consists of a revolving endless belt 2, only indicated symbolically here, to which a plurality of containers 3 of the same design are fastened. The circulation direction 4 of the endless belt 2 is marked with an arrow.
- the method carried out with this trough conveyor 1 for removing removed slags proceeds as described below. From a pan, not shown here, by means of a scraper scraper, also not shown here, intermittently, i. H. a certain amount of slag 5 is drawn off in time with the stroke of the scraper. This falls into a collecting funnel 6, which is arranged above the endless belt 2 and from there directed into a container 3 underneath.
- a filling station is connected upstream of this filling station.
- This has a feed hopper 7, through which the previously empty container 3 is given a predetermined amount of granular solid 8.
- the granular solid 8 is cold slag ground.
- the respective container 3 is partially filled. This pre-filling prevents the residual portion of pig iron or steel present in the slag 5 from adhering to the wall of the container 3.
- the containers 3 pass through a cooling section, here in the form of a cooling tunnel 9.
- a cooling tunnel 9 seen in the transport direction 4 of the endless belt 2, a plurality of nozzles 10 are arranged, from which a cooling medium 12, preferably water, sprays, the jet spraying onto the passing filled containers 3 is directed.
- the arrangement of a cooling tunnel 9 has the advantage that the vapors which are unavoidable during spraying can be sucked off in a controlled manner.
- a suction device 13 which is only indicated here, is installed on the cooling tunnel 9. Since each container 3 has only a relatively small amount of slag 5, it is ensured that the cooling section is sufficient to cool down the amount of slag 5 introduced in coordination with the average transport speed of the endless belt 2.
- the endless belt 2 At the reversal point of the endless belt 2 come the
- Container 3 in the tilted position, so that the total contents, ie pre-fill quantity + slag quantity 5, can be dumped out.
- a trough 11 arranged at this point forms the collecting point. From there, the slag that has already cooled can be removed and used for further use. A part of it can be ground and returned to the feed device 7 as a pre-filler. So that no hot slag 5 can drip into the spaces between the successive containers 3, each container 3 has a cover plate 14.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Details (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10027432 | 2000-05-25 | ||
DE10027432A DE10027432C2 (en) | 2000-05-25 | 2000-05-25 | Process for the removal of solid desulfurization slag which forms during the desulfurization of pig iron |
PCT/DE2001/001991 WO2001090423A1 (en) | 2000-05-25 | 2001-05-18 | Method for conveying away slags, especially desulfurization slags |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1285095A1 true EP1285095A1 (en) | 2003-02-26 |
EP1285095B1 EP1285095B1 (en) | 2005-08-10 |
Family
ID=7644501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01947178A Expired - Lifetime EP1285095B1 (en) | 2000-05-25 | 2001-05-18 | Method for conveying away slags forming on melts of iron or steel, especially desulfuration slag |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1285095B1 (en) |
AT (1) | ATE301725T1 (en) |
AU (1) | AU2001268941A1 (en) |
DE (1) | DE10027432C2 (en) |
WO (1) | WO2001090423A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107699646B (en) * | 2017-11-16 | 2023-02-21 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Stainless steel slag granulating device and method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE582500C (en) * | 1933-08-16 | Paul Ohrt | Process for making porous slag | |
US1803886A (en) * | 1929-02-20 | 1931-05-05 | Paul W Ausman | Slag cooling apparatus |
DE618451C (en) * | 1934-07-21 | 1935-09-09 | Wilhelm Benzinger | Plant for casting refractory molten metal, especially blast furnace slag |
GB457774A (en) * | 1935-06-04 | 1936-12-04 | Erik Bertil Bjorkman | Improvements relating to the production of foamed slag from liquid slag |
US2212962A (en) * | 1937-04-12 | 1940-08-27 | Insulation Products Ltd | Means for puffing slag |
DE831972C (en) * | 1950-07-28 | 1952-02-18 | Esch Werke K G Maschinenfabrik | Method and device for the production of Huettenbims |
US2661575A (en) * | 1950-10-26 | 1953-12-08 | United States Steel Corp | Apparatus for fluffing slag |
DE1508039A1 (en) * | 1951-01-28 | 1969-09-25 | Knapsack Ag | Method and device for the production of piece slag |
JPS5495997A (en) * | 1978-01-12 | 1979-07-28 | Mitsubishi Heavy Ind Ltd | Molten slag treating method |
AT406378B (en) * | 1995-01-24 | 2000-04-25 | Hulek Anton | Method and installation for dry cooling of metallurgical slag with heat recovery - with use of trough belt conveyor for slow solidification of slag into a crystalline structure |
-
2000
- 2000-05-25 DE DE10027432A patent/DE10027432C2/en not_active Expired - Fee Related
-
2001
- 2001-05-18 WO PCT/DE2001/001991 patent/WO2001090423A1/en active IP Right Grant
- 2001-05-18 EP EP01947178A patent/EP1285095B1/en not_active Expired - Lifetime
- 2001-05-18 AU AU2001268941A patent/AU2001268941A1/en not_active Abandoned
- 2001-05-18 AT AT01947178T patent/ATE301725T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO0190423A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE301725T1 (en) | 2005-08-15 |
DE10027432A1 (en) | 2001-12-06 |
AU2001268941A1 (en) | 2001-12-03 |
WO2001090423A1 (en) | 2001-11-29 |
EP1285095B1 (en) | 2005-08-10 |
DE10027432C2 (en) | 2002-05-23 |
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Legal Events
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RTI1 | Title (correction) |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MANNESMANNROEHREN-WERKE GMBH |
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