CN101289709B - Liquid tundish - Google Patents
Liquid tundish Download PDFInfo
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- CN101289709B CN101289709B CN2008101063835A CN200810106383A CN101289709B CN 101289709 B CN101289709 B CN 101289709B CN 2008101063835 A CN2008101063835 A CN 2008101063835A CN 200810106383 A CN200810106383 A CN 200810106383A CN 101289709 B CN101289709 B CN 101289709B
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- tundish
- liquid
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- crystallizer
- pouring basket
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Abstract
The invention provides a liquid pouring basket, comprising a pouring basket body, wherein the pouring basket body is provided inside with a receiving space communicated with a liquid crystallizer; the pouring basket body is provided with a pouring basket heating control device and a pouring basket vacuum extractor; the pouring basket heating control device can keep the temperature in the receiving space of the liquid pouring basket within the preset range, and the pouring basket vacuum extractor can make receiving space of the liquid pouring basket keep the preset vacuum degree; the pouring basket body is also provided with a liquid outlet used for discharging liquids. The liquid pouring basket has the advantages of realizing the semi continuous production of metal vacuum metallurgy, improving production efficiency and lowering production cost.
Description
Technical field
The present invention relates to a kind of reduction jar for vacuum metal smelting, particularly a kind of vacuum melting and reducing tank that is used for smelting magnesium or calcium.
Background technology
Some vapour pressure higher alkali metal and alkaline-earth metal as clang, inscription, magnesium, calcium etc., can make with metallothermics under the condition of vacuum with silicon, aluminium or their alloy.Silicon heat or aluminothermy metallothermic reduction then obtain using the most widely among the metallothermic reduction preparation method of magnesium, but the many forms with ferro-silicon of its reductive agent are used, and the raw material that is reduced mostly is the rhombspar after the calcination, also can be with the forging after product of magnesite and Wingdale mixture.Use the ferrosilicon reductive agent, be called magnesium-smelting silicothermic process and use at most.
Difference according to heating means, present magnesium-smelting silicothermic process can be divided into three kinds: a kind of is production of magnesium by pidgeonprocess (The Pidgeon Process), a kind of is the semi-continuous process refining magnesium (The Magnetherm Process) of France, and another kind is gondola Pierre Jia Nuofa refining magnesium (The Bolgano Process).The former belongs to the magnesium-smelting silicothermic process of outer heating, and then two kinds of methods are internal resistance heating magnesium-smelting silicothermic process.
Wherein most popular both at home and abroad is Pidgeon process, be raw material promptly and be that reductive agent refines magnesium with ferrosilicon (si-Fe) with calcination rhombspar (Mgo, Cao), raw material and reductive agent are mixed in proportion the back pressure to be rolled into a ball into pelletizing feed, then pelletizing feed is put into the reduction jar, jar adding reduction furnace high-temperature (1200 ℃) that will reduce again (reacts under 1～23.3Pa) environment with vacuum.After for some time, magnesium vapor is separated out from pelletizing feed, and is collected by crystallizer behind the arrival reduction tank top.General through after 11～12 hours recovery time, the magnesium metal base of a reduction jar originally could be separated out.Separate out finish after, also need reduction jar is removed, in the reduction jar of having removed, crystallizer is taken out again.At last, behind replacing reduction jar interior pelletizing feed and crystallizer, be reentered in the reduction furnace, so circulate and carry out.
Adopting the advantage of production of magnesium by pidgeonprocess is that method is simple, prolongs usefulness for a long time always, but the weak point of its existence pollutes except the energy consumption height, to environment, also has:
1, traditional reduction jar and crystallizer are to make that the magnesium vapor condensation-crystallization is solid-state the recovery, solid metal magnesium is put into carried out refining after refining furnace melts then.In also original production and refining are produced, all have the process that an intensification reaches phase transformation, not only production process is many, energy consumption is high, and causes production efficiency low, also some loss of magnesium metal output.
2, traditional production method, the production of MAGNESIUM METAL are to be the cycle with reduction cycle (general 11～12 hours), belong to be interrupted and produce, and go out the magnesium poor continuity, are unsuitable for big industrial production.
3, traditional production method, hand labor dependency height, poor working environment, job security is low, is unsuitable for big industrial production.
Therefore, also be necessary the apparatus and method of existing production of magnesium by pidgeonprocess are improved, to meet the needs that modern industry is produced.
Summary of the invention
At the deficiencies in the prior art, the objective of the invention is to: a kind of liquid tundish is provided, solves the low problem of poor continuity, production efficiency that conventional metals vacuum metling exists.
For achieving the above object, the technical solution used in the present invention is:
A kind of liquid tundish, it is characterized in that: comprise a tundish main body, has article containing space in the described tundish main body, and described article containing space communicates with a liquid crystallizer, described tundish main body is provided with tundish heating control apparatus and tundish vacuum extractor, described tundish heating control apparatus remains in the pre-determined range the interior temperature of article containing space of liquid tundish, described tundish vacuum extractor makes in the article containing space of tundish main body and remains on predetermined vacuum tightness, and described tundish main body also is provided with a liquid outlet that is used for discharge opeing.
In the preferable technical scheme, can also add following technical characterictic: described tundish heating control apparatus adopts electric heater unit.
In the preferable technical scheme, can also add following technical characterictic: also be provided with a tundish control valve group, with the article containing space of controlling described tundish main body and the connected state of liquid crystallizer.
In the preferable technical scheme, can also add following technical characterictic: the material of described tundish main body is the Cr18Ni9Ti stainless material.
In the preferable technical scheme, can also add following technical characterictic: described tundish main body external packets is covered with heat preserving and insulating material.
In the preferable technical scheme, can also add following technical characterictic: the material of described heat preserving and insulating material is an aluminium sesquioxide.
Compared with prior art, the beneficial effect that has of the present invention is:
1, magnesium vapor liquid crystals in crystallizer maintains it liquid state and transports to refining in the refining furnace by tundish again, has saved solid metal magnesium phase transformation energy needed in refining furnace, has both reduced operation, has saved the energy again, has reduced production cost;
2, the charging of reduction jar, slagging tap does not influence the work of liquid crystallizer, has guaranteed the continuity of liquid crystallizer work, is the important assurance that realizes semicontinuous production;
3, the control by tundish control valve group, liquid magnesium are the essential condition that realizes semicontinuous production regularly, flow in the liquid tundish quantitatively.
4, the existence of guide shell makes that the circulation of magnesium vapor is more smooth and easy, has shortened the recovery time (reducing to 9～10 hours), has saved fuel, has shortened the work period, has improved production efficiency.
Description of drawings
But Fig. 1 is the structural representation of the metal vacuum smelting reduction device of the present invention's semi-continuous production;
Fig. 2 is the structural representation of liquid crystallizer of the present invention;
Fig. 3 is the structural representation of liquid tundish of the present invention;
Fig. 4 is the structural representation after guide shell of the present invention is cut open from the centre;
Fig. 5 is the another kind of structural representation after guide shell of the present invention is cut open from the centre;
Fig. 6 is another structural representation after guide shell of the present invention is cut open from the centre.
Embodiment
For structure of the present invention and characteristics can be understood better, below will the present invention is described in detail by preferred embodiment and accompanying drawing bonded mode.In order to make structure of the present invention more clear, described accompanying drawing might change actual proportionlity in drawing process, and this is not appreciated that the qualification to present patent application.
As shown in Figure 1, but be the structural representation of the metal vacuum smelting reduction device of the present invention's semi-continuous production, comprise reduction furnace 1, reduction jar 4, liquid crystallizer 8 and liquid tundish 20, wherein:
Described reduction furnace 1 adopts regenerative combustion technology, and is provided with body of heater 3 and burner 2, all is prior aries, will not give unnecessary details.
Described reduction jar 4 vertically is arranged in the body of heater 3 of reduction furnace 1, and stretch out outside the body of heater 3 at two ends.Wherein, reduction jar 4 upper ends are provided with mechanical charging mouth 5, and the lower end is provided with mechanical discharge port 6, can realize mechanize ground pan feeding and discharging.(in fact, also can be the upper end) sidepiece is connected with a piped guiding device 7 in reduction jar 4 lower ends, is used for the magnesium vapor in the reduction jar 4 is derived.Middle part in reduction jar 4 is installed with a guide shell 11, described guide shell 11 is that the heating resisting metal material (can anti-1300 ℃ of high temperature, as Cr25Ni20Si2 heat-resistance stainless steel material), and as shown in Figure 4, described guide shell 11 is hollow tube-shape, also has the gap between described guide shell 11 and reduction jar 4 inwalls, for placing pelletizing feed, guide shell 11 bottoms are provided with block body 12, avoid pelletizing feed to spill; On the stack shell of guide shell 11, be provided with a plurality of holes 14 that run through wall thickness, inside and external communications with guide shell 11, accelerate the speed of separating out of magnesium vapor, also be provided with a plurality of air channels 15 on the outer side wall of described guide shell 11 along its length, flow to described guiding device 7 along guide shell 11 for magnesium vapor.Described hole 14 does not need concrete restriction with shape, the size of air channel 15, and can ventilate gets final product, and certainly, spills in order to prevent pelletizing feed, and the width of hole 14 should be less than the diameter of pelletizing feed.And the setting of air channel 15 also can be increased and decreased according to actual needs, if the circulation speed of magnesium vapor can reach design requirements, just there is no need to offer described air channel 15; Circulation speed at magnesium vapor does not reach under the situation of design requirements, just is necessary to offer described air channel 15.
Wherein, in the present embodiment, described hole 14 is oval-shaped through holes, and described hole 14 also can be circular hole, polygonal hole or slotted hole.
What need replenish is that above-mentioned guiding device 7 is connected with described guide shell 11 inside after stretching into reduction jar 4, has good water conservancy diversion effect.In the present embodiment, described guiding device 7 is heating resisting metal material (can anti-1300 ℃ of high temperature, as Cr25Ni20Si2 heat-resistance stainless steel material), is shaped as pipe shape or square tube type and all can.
Described guiding device 7 overhanging ends connect described liquid crystallizer 8, and described liquid crystallizer 8 is provided with crystallizer control valve group 84 with guiding device 7 junctions.The internal structure of described liquid crystallizer 8, as shown in Figure 2, comprise crystallizer housing 81, crystallizer housing 81 materials preferably adopt the Cr18Ni9Ti stainless material, adopt the thick stainless steel plate punching press welding of 12mm to make, the crystallizer housing 81 outside heat insulating staplings of using are incubated (for simplicity, described heat insulating fiber does not give diagram, its material is an aluminium sesquioxide), described crystallizer housing 81 has accommodation space, and switches the connected state of accommodation space and guiding device 7 by described crystallizer control valve group 84.Also be provided with crystallizer heating control apparatus 82 and crystallizer vacuum extractor 83 on the described liquid crystallizer, described crystallizer heating control apparatus 82 (preferably adopting electric heater unit) makes crystallizer housing 81 interior temperature remain on certain limit, and (temperature controlling system belongs to prior art, do not repeat them here), thereby transform and remain on liquid state after making magnesium vapor enter liquid crystallizer 8, described crystallizer vacuum extractor 83 makes in the accommodation space of housing 81 of crystallizer 8 and remains on predetermined vacuum tightness.
Described liquid tundish 20 communicates by the accommodation space of intermediate conduit 21 with described liquid crystallizer 8, and described intermediate conduit 21 is provided with tundish control valve group 22, to switch the connected state of liquid tundish 20 and liquid crystallizer.The concrete structure of described liquid tundish 20, as shown in Figure 3, comprise one tundish main body 23, the material of tundish main body 23 is the Cr18Ni9Ti stainless material, adopt the thick stainless steel plate punching press welding of 8mm to make, tundish main body 23 external packets are covered with heat preserving and insulating material (for simplicity, described heat preserving and insulating material does not give diagram, its material is an aluminium sesquioxide), has article containing space in the tundish main body 23, described tundish main body 23 is provided with tundish heating control apparatus 24 and tundish vacuum extractor 25, described tundish heating control apparatus 24 (preferably adopting electric heater unit) makes liquid tundish 20 interior temperature remain on certain limit, and (temperature controlling system belongs to prior art, do not repeat them here), thereby remain on liquid state after making liquid magnesium enter liquid tundish 8, described tundish vacuum extractor 25 makes in the article containing space of tundish main body 23 and remains on predetermined vacuum tightness.Described tundish main body 23 also is provided with a liquid outlet 26, is used for the liquid magnesium in the article containing space is discharged, to descend refining procedure one.
But below introduce the metal vacuum smelting reduction device that how to use above-mentioned semi-continuous production, may further comprise the steps:
(1) guide shell 11 is fixed in the reduction jars 4, and will reduce and jars 4 be fixed in the reduction furnace 1, pelletizing feed is joined inside and outside the interior guide shell 11 of reduction jars 4;
(2) will reduce jars 4 sealings and vacuumize and reach production requirement, then starting 1 pair of reduction jar 4 of reduction furnace heats, after reaching working temperature, magnesium vapor is separated out from pelletizing feed, and the hole 14 by guide shell 11 and air channel 15 arrive described guiding device 7, enters the liquid crystallizer 8 from guiding device 7 then;
(3) the magnesium vapor temperature that enters in the liquid crystallizer 8 reduces, and is converted into liquid state, and remains on liquid state;
(4) control by described tundish control valve group 22, the liquid magnesium in the liquid crystallizer 8 regularly, flow in the liquid tundish 20 quantitatively, to realize semicontinuous production;
(5) after liquid tundish 20 is filled, transport to refining in the refining furnace; Simultaneously, changing a liquid tundish 20 links to each other with liquid crystallizer 8; So, do not stop to change and transport liquid tundish 20;
(6) after to be restored jar 4 interior MAGNESIUM METAL separated out and finished, close described crystallizer control valve group 84, jar 4 bottom mechanical discharge ports 6 that will reduce are then opened, and will expect the slag removing, then, close mechanical discharge port 6, open power feed mouth 5, put into new pelletizing feed, vacuumize, open described crystallizer control valve group 84, begin new reduction work.
Use the metal vacuum smelting reduction device and the method for reducing of semi-continuous production of the present invention, compared with prior art, have following advantage:
1, magnesium vapor liquid crystals in crystallizer maintains it liquid state and transports to refining in the refining furnace by tundish again, has saved solid metal magnesium phase transformation energy needed in refining furnace, has both reduced operation, has saved the energy again, has reduced production cost;
2, the charging of reduction jar, slagging tap does not influence the work of liquid crystallizer, has guaranteed the continuity of liquid crystallizer work, is the important assurance that realizes semicontinuous production;
3, the control by tundish control valve group, liquid magnesium are the essential condition that realizes semicontinuous production regularly, flow in the liquid tundish quantitatively.
4, the existence of guide shell makes that the circulation of magnesium vapor is more smooth and easy, has shortened the recovery time (reducing to 9～10 hours), has saved fuel, has shortened the work period, has improved production efficiency.
As shown in Figure 5, be another structure formation of guide shell, it is compared with Fig. 4, and difference is: air channel 15 is the circumferential settings along guide shell 11, so the air channel 15 that is provided with can be communicated with each hole 14 get up equally, promotes the circulation speed of magnesium vapor.
And as shown in Figure 6, be again another structure formation of guide shell, compare with previous embodiment, its difference is: part air channel 15 is provided with along its length, a part of in addition air channel 15 is along circumferentially being provided with, so the air channel 15 that is provided with can further be promoted the contact between each hole 14, improves the circulation speed of magnesium vapor again, thereby improves the production efficiency of MAGNESIUM METAL.In addition, in the present embodiment, hole 14 and air channel 15 have used polygonal shape, also are different places.
In fact, under the prerequisite of the structural strength that does not influence guide shell 11, the bearing of trend of air channel 15 can also be changed, for example be arranged to volution or arachnoid, all be fine.
In the foregoing description, be that smelting with MAGNESIUM METAL is example explanation the application's structure and characteristics, and in fact, the inventive method and device are equally applicable to smelt vapour pressure higher alkali metal and alkaline-earth metal such as clang, inscription, calcium, difference wherein to those skilled in the art, belong to common practise, do not repeat them here.
More than explanation is just illustrative for the purpose of the present invention; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within protection scope of the present invention.
Claims (6)
1. liquid tundish, it is characterized in that: comprise a tundish main body, has article containing space in the described tundish main body, and described article containing space communicates with a liquid crystallizer, described tundish main body is provided with tundish heating control apparatus and tundish vacuum extractor, described tundish heating control apparatus remains in the pre-determined range the interior temperature of article containing space of liquid tundish, described tundish vacuum extractor makes in the article containing space of tundish main body and remains on predetermined vacuum tightness, and described tundish main body also is provided with a liquid outlet that is used for discharge opeing.
2. liquid tundish according to claim 1 is characterized in that: described tundish heating control apparatus adopts electric heater unit.
3. liquid tundish according to claim 1 is characterized in that: also be provided with a tundish control valve group, with the article containing space of controlling described tundish main body and the connected state of liquid crystallizer.
4. liquid tundish according to claim 1 is characterized in that: the material of described tundish main body is the Cr18Ni9Ti stainless material.
5. liquid tundish according to claim 1 is characterized in that: described tundish main body external packets is covered with heat preserving and insulating material.
6. liquid tundish according to claim 5 is characterized in that: the material of described heat preserving and insulating material is an aluminium sesquioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101063835A CN101289709B (en) | 2008-05-13 | 2008-05-13 | Liquid tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101063835A CN101289709B (en) | 2008-05-13 | 2008-05-13 | Liquid tundish |
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| Publication Number | Publication Date |
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| CN101289709A CN101289709A (en) | 2008-10-22 |
| CN101289709B true CN101289709B (en) | 2010-12-08 |
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| CN2008101063835A Expired - Fee Related CN101289709B (en) | 2008-05-13 | 2008-05-13 | Liquid tundish |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102990049B (en) * | 2012-12-24 | 2015-08-05 | 云南云铝涌鑫铝业有限公司 | Vacuum ladle |
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| CN101289709A (en) | 2008-10-22 |
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Owner name: QINGDAO MODERN BOILER CO., LTD. Free format text: FORMER OWNER: XIN WEIYA Effective date: 20111011 |
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Effective date of registration: 20111011 Address after: 266000, Shandong, Qingdao Pingdu with the office of the resident Patentee after: Xiandai Boil Co Ltd, Qingdao Address before: 102488 Beijing City, Fangshan District Liangxiang North Lu spring home E1 floor Room 203 Patentee before: Xin Weiya |
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