CN1067597A - Prevent that ladle and middle pot drainage opening from going out the device of volume slag in the stream - Google Patents
Prevent that ladle and middle pot drainage opening from going out the device of volume slag in the stream Download PDFInfo
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- CN1067597A CN1067597A CN 91103631 CN91103631A CN1067597A CN 1067597 A CN1067597 A CN 1067597A CN 91103631 CN91103631 CN 91103631 CN 91103631 A CN91103631 A CN 91103631A CN 1067597 A CN1067597 A CN 1067597A
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- slag
- chock plug
- stopper
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Abstract
The present invention is used to prevent that ladle and middle pot drainage opening from going out the device of stream volume slag.
Structure of the present invention is the stopper system that keeps former stopper mouth of a river control stream mode, utilizes former chock plug, keeps the bottom that its top is the spherical crown shape, and its top constitutes special-shaped pushing off the slag head by the assembly of cylinder and round platform, is applicable to the stopper cast.Perhaps only be combined into the pushing off the slag head of platybasic type, be applicable to slide gate nozzle cast, cylinder go to the bottom desirable 0-20 millimeters of ring surface and brick cup end face distance by round platform and cylinder.
The present invention is simple in structure, be convenient to operation, can prevent casting process volume slag, improves steel quality and molten steel recovery rate.
Description
The present invention is a slag apparatus for pouring under a kind of nothing that at first is applicable to ladle and pans in the STEELMAKING PRODUCTION.
In the cast latter stage of ladle and pans, when the molten steel face drops to a certain critical altitude.Converge that circulation is moving to produce the funnel-form vortex significantly because of mouth of a river top forms, cause steel stream whirlpool core volume slag and descend, becoming that increasing mixes in the steel presss from both sides a lastness cause of thing content.
Still do not have at present the means that accurate judgement will be descended the critical liquid level of slag, also be close to grasp and close the mouth of a river to stop down the opportune moment of slag.In order to prevent down slag, often take a kind of passive measure that can be referred to as excessive surplus steel method in the production scene.For example, before pans are changed, stay the molten steel amount that is higher than critical liquid level far away, cause paying the cost of appreciable minimizing billet yield.In order to reduce slag down, the method for having used is a steel stream slag inclusion detection method.Artificial visually examine's method and instrument detection method are wherein arranged.In case ocular estimate is that the visual shading value difference that difference was caused of steel and slag luminous intensity is signal during with steel stream slag inclusion, closes the mouth of a river immediately.But surrounded by steel stream because bits are in the eddy current center, be actually beginning and just discovered behind the slag down in a large number, vision lags behind; action lags behind; its delay degree also varies with each individual, and steel stream protective device being arranged or connecing under the condition of submersed nozzle, no longer has the condition of this artificial intuitive judgment.A kind of luminous intensity detection method is arranged in the instrument detection method, and its principle is identical with ocular estimate.This method is near steel stream; for example on steel stream oxygen-proof protecting device, set up optical rod; cause light intensity detector through optical fiber; after signal reached MICROCOMPUTER PROCESSING, give the alarm, close the mouth of a river; this method is better than ocular estimate; except that delay degree is little, can be used for having the occasion of steel stream oxygen-proof protecting device, but be not suitable for the situation of using submersed nozzle.Also has a kind of electromagnetic induction method in the instrument detection method.This method is on the position of the steel stream both sides that do not influence refractory materials such as changing the mouth of a river, slide plate at the bottom of the jar, the induction coil sensor is installed, one side is a transmitter, one side is a receiver, by means of the size of electromagnetic signal roughly with steel stream in the fact that how much is directly proportional of slag inclusion amount, make signal reach operation board, when signal value reaches the setting value size, give the alarm, close the mouth of a river.The intuitive judgment mode of the bits of carrying secretly in the steel stream can " be seen " on the still true border of this test method, but its range of application is unrestricted.
In order to prevent down slag, existing a kind of what is called valve method of swimming is used.This method be with a built-in iron core make its proportion before the discoid fire resistive material product that lower central between the proportion of molten steel and slag has a chock plug body is being about to vortex occur, render to water gap of steel teeming ladle directly over, central authorities give under the situation of certain tension force vertically in the top, make it to descend along with the decline of liquid level, until its plug head and mouth of a river interlock, thereby prevent the generation of vortex, reduce slag enters pans from ladle quantity, and when with mouth of a river interlock after, top tension force disappears, and becomes cast and finishes enforcement from the signal of moving package operation.The skimming device that similarly floats also has a lot, and has obtained patent right separately.
In the said method, except that excessive surplus steel method and ocular estimate, domestic also all application, abroad also do not popularize, reason is an instrument detection method apparatus expensive, and can not eliminate vortex, though and it is more cheap at the eddy current TVS of the valve and so on that swims at slag steel interface to float, but manufacturing is comparatively complicated mostly with operation, and the pushing off the slag effect is also reliably incomplete, and is not applicable to stopper mouth of a river control streaming system.
The objective of the invention is to reach and prevent that the mouth of a river from going out the effect of stream volume slag with a kind of simple and reliable method.Its basic principle be with a firm shape appropriate can lifting in certain limit the rigid body device, (can guarantee that molten steel flows freely and make its gap of flow by the mouth of a river) to occupy the space that exists that belongs to funnel-form vortex (being equivalent to converge the moving vortex core district of circulation) originally from top to bottom with regulation until having only one with the brick cup upper surface, play the tangential velocity that reduces fluid motion promptly produces trigger action to circulation movement effect simultaneously, thereby weaken circulation strength to greatest extent, and change flow direction before molten steel enters the mouth of a river, make near its mobile points of proximity moving state that confluxes that changes into.Its result, before the molten steel face drops to institute's clearance height of staying, vortex can not take place fully, and within dropping to the clearance height scope time, because the gap is little, last molten steel only is a thin layer, temperature greatly descends in addition, and its flowability reduces, and flow velocity is slack-off, slag viscosity is more much bigger than the molten steel, the more difficult inflow mouth of a river.Using monitoring apparatus so that under the condition of range estimation, when apparent the reducing of discovery mouth of a river steel lumen, perhaps the end of observing this device by an operative employee will soon all be exposed and will be reported to the police during the flow condition marked change near it, close the mouth of a river, just can prevent down slag fully.
Apparatus structure of the present invention and method of operating such as Fig. 1 and shown in Figure 5.
What Fig. 1 represented is to be applicable to that the steel flow control system is the situation at the stopper mouth of a river.Chock plug among the figure (3) is in closure state with the mouth of a river (1).In this case, the structure and the flow control function that keep former stopper device fully, it mainly assembles with method of operating and does not do any change, only the profile with the chock plug part still is used to control steel stream by the spherical crown portion that traditional shape Fig. 2 changes special shape Fig. 3 lower end into, the assembly of the special-shaped portion of upper end (cylinder (5) and round platform (6)) is then for being used for the special-shaped pushing off the slag head of pushing off the slag, and its main appearance and size determines that principle is as follows:
1. chock plug (3) spherical crown portion radius is constant, to keep coincideing good with the matching used former mouth of a river;
2. columnar portion (5) outer diameter D
1Get d＜D
1≤ a (d and a are respectively the brick cup back cut diameter and the brick cup length of side) is to guarantee to change the flow direction before molten steel enters the mouth of a river, its height h
2Be taken as 30-50mm, consider to select on demand from soak time and intensity;
3. ring surface external diameter in round platform portion (6) upper end is equal to or slightly greater than formerly in chock plug external diameter (being the external diameter of sleeve brick (4)) D, is convenient to and sleeve brick (4) is assembled with former interface size;
4. columnar portion (5) distance h of ring surface of going to the bottom to chock plug (3) spherical crown portion summit
1=x
1+ x is x wherein
1Distance for chock plug (3) summit to brick cup (2) upper surface.X is columnar portion (5) distance of ring surface to brick cup (2) upper surface of going to the bottom.
x
1Can calculate according to the relative dimensions of matching used brick cup (2), the mouth of a river (1), chock plug (3), but the most simple and reliable method is to obtain measured value under former normal assembled condition.
The x span is taken following factors into account:
(1) its value is greater than 0, to guarantee not hinder the good of the chock plug and the mouth of a river to coincide.
(2) its value can not be too small, in order to avoid molten steel is in pushing off the slag head (columnar portion go to the bottom ring surface), forms the dead band in chock plug, the mouth of a river, the space that brick cup surrounded and solidify and cause opening the danger of watering failure;
(3) its value also can not be excessive, otherwise open circulation when going into normal cast at stopper, reduces down to losing the pushing off the slag function because of its value is excessive., it is also noted that generally speaking that effective adjustment stroke of stopper only is about the 5mm for this reason.
Comprehensive above factor is considered desirable x=5-15mm.
So h
1=x
1(preferably measured value)+(5～15)
5. when can not when satisfying above-mentioned shape and dimensional requirement, answering desired height value of corresponding increasing with former height h with chock plug Fig. 2 (7), for example the height h of the cylinder of getting (5)
2Value, also can add the tapering of big round platform (6) part without hesitation, be equivalent to increase half so that the height (as shown in phantom in Figure 1) of a sleeve brick.
6. for guaranteeing that the chock plug and the mouth of a river well coincide, in principle must be substantially do not influence under the condition of sight line and go up the clubs work according to former situation with chock plug Fig. 2, for this reason, special-shaped pushing off the slag chock plug (accompanying drawing 3) decomposition that profile can be met above-mentioned requirements is made into two parts, and its key dimension is shown in (accompanying drawing 4).When making rod, with the outside special-shaped ring body (8) of special-shaped pushing off the slag head in advance pine be enclosed within on the inner chock plug (9), treat that the stopper overall package finishes after, with thin wire etc. special-shaped ring body is fixed on a certain position, stopper middle and lower part; Last when rod, confirm that the chock plug and the mouth of a river coincide good and fix after, more special-shaped ring body is put down, with fire clay put in place tight compacted cooperation of itself and inner chock plug.
7. above diagram and explanation are to use the situation at the combined plunger and the fitted outside mouth of a river, and its basic principle is equally applicable to the occasion at the integral type stopper and the built-in type mouth of a river.
The present invention is used to have the ladle of stopper system, tundish, stopper comprises sleeve brick and spherical crown shape chock plug, the top of spherical crown shape chock plug is the special-shaped pushing off the slag head that round platform (6) and cylinder (5) are formed, its bottom keeps protocorm crown head chock plug (3), see Fig. 1, round platform upper end ring surface external diameter equals or is slightly larger than the sleeve brick external diameter, cylindrical diameter is greater than brick cup (2) back cut diameter, and be less than or equal to the brick cup length of side, special-shaped pushing off the slag head height degree (comprising spherical crown shape chock plug part) equals former stopper chock plug height, or increase by half to one sleeve brick height, cylindrical ring surface and the desirable 5-15 millimeter of brick cup end face distance of going to the bottom.
What Fig. 5 represented is to be applicable to that the steel flow control system is the situation of slide gate nozzle (and metering nozzle).Representing to put into the preceding a kind of fixation state of molten steel among the figure.In this case, ladle or pans are set up complete stopper mechanism that can lifting in certain limit, only or else need cooperate with the mouth of a river to control steel by chock plug especially this moment and flow, thereby comprise cylinder (5), round platform (6) and become flat retaining (slag) head.So this mechanism can be referred to as class stopper mechanism.The making of pushing off the slag head is oversimplified, can its profile of global formation shown in solid line among Fig. 5, comprise cylinder (10), the platybasic type pushing off the slag head of round platform (6) and cylinder (5).Also can make profile shown in dotted lines in Figure 5, the platybasic type pushing off the slag head that comprises the combination of round platform (11) and cylinder (5), can the adjusting in 〉=0 certain limit apart from x of bottom surface to brick cup (2) upper surface of a retaining cylinder (5) generally is of a size of suitable to get x=0-20mm as the fixation before ladle or pans are put into molten steel.When the mouth of a river is not normal, also can change the position of retaining head by lowering or hoisting gear, with supplementary means as adjusting steel stream.
Embodiment 1 sees Fig. 1, when a pushing off the slag cylinder outer diameter D in the occasion that certain pans adopts stopper nozzle assembly control steel to flow
1When the distance that equals shelves a lower surface and the brick cup upper surface of brick cup length of side a is 10-20mm (be about the same in the chock plug and the mouth of a river x=5-15mm when being in closure state), the molten steel face is higher than in the whole casting process of 10-20mm, there is not slag to enter crystallizer, when finding that the mouth of a river goes out stream and falls sharply, close the mouth of a river immediately, no slag enters crystallizer extremely eventually.
When embodiment 2 adopted slide gate nozzle adjusting steel stream to carry out die casting at certain ladle, accompanying drawing 5 was in a flat retaining outer diameter D
1Equal brick cup length of side a, during the height x=10mm of location, the molten steel face drops to before the 10mm, completely without slag generation down, when the molten steel face was lower than 10mm, molten steel was close to and uses up, and slag fluidity is very poor, even do not close the mouth of a river, also have only very a spot of bits to flow into feed trumpet, steel ingot there has not been harm.
Device involved in the present invention is simple, and only the stopper head to traditional stopper mouth of a river control streaming system has less change, traditional stopper is become have the difunctional stopper of controlling stream-pushing off the slag or pushing off the slag-control stream effect concurrently.Under the condition that need not complicated sensing instrument system and operating technology, can reach and almost molten steel all be used up and down slag of trace only arranged, so that prevent down the purpose of slag fully, obtain purification steel and the highest recovery rate of realization simultaneously and in many stoves casting process, be convenient to change the multiple benefit of watering steel grade.
The present invention is not only applicable to the production processes such as continuous casting, die casting so that tapping of steel plant, and is applicable to the similar field of Foundry Works and nonferrous metallurgy factory.
Claims (4)
1. what ladle and middle pot drainage opening went out stream prevents to roll up the slag device, comprise fire-resistant sleeve brick stopper, spherical crown shape chock plug, the top that it is characterized in that spherical crown shape chock plug is the special-shaped pushing off the slag head that cylinder and round platform are formed, round platform upper end ring surface external diameter equals or is slightly larger than sleeve brick external diameter, cylindrical diameter greater than the brick cup back cut diameter, and be less than or equal to the brick cup length of side, the height of special-shaped pushing off the slag head equals former stopper head height degree or increases by half to one sleeve brick height, cylindrical ring surface and the desirable 5-15 millimeter of brick cup upper surface distance of going to the bottom.
2. prevent to roll up the slag device according to claim 1 is described, it is characterized in that special-shaped pushing off the slag head, comprise the platybasic type of round platform and cylinder, distance is the 0-20 millimeter between its cylinder lower surface to slide gate nozzle brick cup upper surface.
3. prevent to roll up the slag device according to claim 1 is described, it is characterized in that the special-shaped pushing off the slag head decomposition that comprises spherical crown shape chock plug is made into two parts, outside special-shaped ring body and inner chock plug, when making rod, outside special-shaped ring body, pine is enclosed within on the inner chock plug, treat that the stopper overall package finishes, last when rod, confirm that the chock plug and the mouth of a river coincide good and fix after, with fire clay tight compacted cooperation of special-shaped ring body and inner chock plug put in place again.
4. prevent to roll up the slag device according to claim 1 is described, it is characterized in that being suitable for stopper, slide gate nozzle continuous casting and die casting running gate system, tapping process.Also be suitable for the similar field of Foundry Works and non-ferrous metallurgical plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103631 CN1024263C (en) | 1991-06-07 | 1991-06-07 | Device for preventing generation of coiled slag at affluent mouth of steel ladle and middle tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103631 CN1024263C (en) | 1991-06-07 | 1991-06-07 | Device for preventing generation of coiled slag at affluent mouth of steel ladle and middle tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1067597A true CN1067597A (en) | 1993-01-06 |
| CN1024263C CN1024263C (en) | 1994-04-20 |
Family
ID=4906189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103631 Expired - Fee Related CN1024263C (en) | 1991-06-07 | 1991-06-07 | Device for preventing generation of coiled slag at affluent mouth of steel ladle and middle tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024263C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328070A (en) * | 2011-10-21 | 2012-01-25 | 北京科技大学 | Flow suppression ring for tundish stopper |
| CN102407323A (en) * | 2011-11-10 | 2012-04-11 | 青岛正望钢水控制股份有限公司 | Aluminum carbon bale roughing slag controller used for continuous casting |
| CN102825229A (en) * | 2012-08-24 | 2012-12-19 | 中冶南方工程技术有限公司 | Flow control structure for preventing vortexes from being generated in tundish |
| CN105436451A (en) * | 2014-09-25 | 2016-03-30 | 鞍钢股份有限公司 | Method for casting heavy rail steel tail blank through tundish without slag blocking device |
| CN106940140A (en) * | 2017-02-28 | 2017-07-11 | 西安交通大学 | A kind of two grades of molten slag caching systems with flow temperature monitoring and control function |
| CN108380862A (en) * | 2018-04-03 | 2018-08-10 | 青岛正望钢水控制股份有限公司 | A kind of anti-slag stopper of continuous casting |
| CN109513911A (en) * | 2018-12-24 | 2019-03-26 | 中冶陕压重工设备有限公司 | A kind of casting device of Split type multipurpose |
| CN109909466A (en) * | 2019-03-19 | 2019-06-21 | 沈阳麒飞新型材料科技有限公司 | A kind of more mouth of a river continuous casting equipments |
-
1991
- 1991-06-07 CN CN 91103631 patent/CN1024263C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328070A (en) * | 2011-10-21 | 2012-01-25 | 北京科技大学 | Flow suppression ring for tundish stopper |
| CN102407323A (en) * | 2011-11-10 | 2012-04-11 | 青岛正望钢水控制股份有限公司 | Aluminum carbon bale roughing slag controller used for continuous casting |
| CN102825229A (en) * | 2012-08-24 | 2012-12-19 | 中冶南方工程技术有限公司 | Flow control structure for preventing vortexes from being generated in tundish |
| CN105436451A (en) * | 2014-09-25 | 2016-03-30 | 鞍钢股份有限公司 | Method for casting heavy rail steel tail blank through tundish without slag blocking device |
| CN106940140A (en) * | 2017-02-28 | 2017-07-11 | 西安交通大学 | A kind of two grades of molten slag caching systems with flow temperature monitoring and control function |
| CN106940140B (en) * | 2017-02-28 | 2018-09-04 | 西安交通大学 | A kind of two level molten slag caching system with flow temperature monitoring and control function |
| CN108380862A (en) * | 2018-04-03 | 2018-08-10 | 青岛正望钢水控制股份有限公司 | A kind of anti-slag stopper of continuous casting |
| CN109513911A (en) * | 2018-12-24 | 2019-03-26 | 中冶陕压重工设备有限公司 | A kind of casting device of Split type multipurpose |
| CN109909466A (en) * | 2019-03-19 | 2019-06-21 | 沈阳麒飞新型材料科技有限公司 | A kind of more mouth of a river continuous casting equipments |
| CN109909466B (en) * | 2019-03-19 | 2023-12-19 | 沈阳麒飞新型材料科技有限公司 | Continuous pouring equipment with multiple water gaps |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024263C (en) | 1994-04-20 |
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