CN1115216C - Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper - Google Patents
Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper Download PDFInfo
- Publication number
- CN1115216C CN1115216C CN 00116394 CN00116394A CN1115216C CN 1115216 C CN1115216 C CN 1115216C CN 00116394 CN00116394 CN 00116394 CN 00116394 A CN00116394 A CN 00116394A CN 1115216 C CN1115216 C CN 1115216C
- Authority
- CN
- China
- Prior art keywords
- seal closure
- positive
- casting
- red copper
- seal
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a positive-pressure sealing device on a red copper crystallizing die. The present invention comprises a crystallizing die and a crystallizing die seat, wherein the bottom of the crystallizing die seat is provided with a spraying ring; the present invention also comprises a seal assembly and a lifting device; the seal assembly comprises a seal cover, a seal ring and an observation window arranged on the seal cover; the seal cover is arranged on the crystallizing die seat in a sliding mode; two hydraulic devices are also symmetrically arranged on the crystallizing die seat; the seal ring is arranged in a ring groove at the top of the seal cover. A red copper positive-pressure casting technique comprises that firstly, the seal cover and a furnace end bottom surface are sealed in casting; then, pressure nitrogen is filled in the crystallizing die to establish positive-pressure and provide circulating cooling liquid; after the casting is finished, the nitrogen is shut off to drop a hydraulic cylinder, and the seal ring is disengaged from the furnace end.
Description
The present invention relates to a kind of red copper malleation casting technique and be exclusively used in the positive seal device of this technology.
Red copper (the copper processing criterion is called T2 copper) is because its very easily oxygen uptake under molten condition causes the casting quality difference bad, so the melting and casting process all will be taked special protectiveness technology.Conventional semi-continuous casting (as shown in Figure 3), when copper was melted to casting temperature, graphite stopper 64 revolved liter by stopper screw 61 in screw seat 62, and the screw seat is connected by connecting bolt 63 and burner 65; Copper liquid flow to crystallizer 10 through graphite base cone 67 by graphite depositing 69.Graphite depositing 69 is connected on the base plate 66 by depositing screw 68, and the graphite depositing is embedded under the interior copper liquid level of crystallizer.Can cause serious oxygen uptake to pollute in the atmosphere because the copper liquid level is directly exposed to, take following several protected mode usually:
Be to cover one deck cigarette ash (carbon black) 611 on the copper liquid level among Fig. 3, cigarette ash is fine particle, or even powdery, covers the copper liquid that has completely cut off fusion on the copper liquid level and contacts with atmosphere, and the oxygen in the copper liquid partly can be restored.Cigarette ash protection be the most frequently used in medium and small copper processing factory also be more effective a kind of mode, its shortcoming is an operating environment of pollution, makes the casting cooling water rotten, the cigarette ash protection also causes some problems on ingot casting 612 surfaces.
Fig. 4 is another kind of protected mode; promptly do protection with the coal gas of burning, be placed with the coal gas burner 73 of ring-type on crystallizer 10, the flame that sprays during casting can whole covering copper liquid level; and the carbon dioxide that carbon monoxide and burning generate does not pollute the copper liquid level of fusion, has guaranteed the not oxygen uptake of copper liquid level.
Shown in Figure 5 is to use protective gas, normally protects with nitrogen, and a protective cover 84 is housed on crystallizer 10, as long as that nitrogen is passed in and out the direction arrangement is reasonable, has nitrogen protection on the copper liquid level all the time, can oxygen uptake, and ingot quality can be guaranteed.
More than three kinds of continuously casting copper liquid level protected modes are general red copper casting techniques both at home and abroad, other has a kind of vacuum pressing and casting, then needs carry out under vacuum melting atmosphere, has not belonged to conventional copper founding.
Existing casting protected mode is all carried out under ambiance (normal pressure); its starting point is in the not oxygen uptake of protection copper liquid level; the invention provides a kind ofly, adopt malleation casting technique and employed Casting Equipment thereof, so that ingot quality can better be guaranteed in the casting technique of depressing very much.
The objective of the invention is to be achieved through the following technical solutions:
Positive seal device on a kind of red copper crystallizing mould, comprise: a crystallizing mould, it is installed on the crystallization die holder, crystallization die holder bottom is provided with a water ring, it is characterized in that: also comprise a black box and a lowering or hoisting gear, described black box comprises a seal closure, and a sealing ring and is installed on the observation window on the seal closure, offers closable air admission hole on this observation window; Seal closure is slidably mounted on the described crystallization die holder, also offers an annular groove on the top of seal closure, and described sealing ring is installed in this annular groove; Described lowering or hoisting gear is two hydraulic means, and they are installed on the described crystallization die holder symmetrically.
A kind of red copper malleation casting technique is characterized in that it may further comprise the steps:
(1) when the refining of copper liquid finishes to prepare casting, start lowering or hoisting gear, make the seal closure on the described positive seal assembly be raised to the burner bottom surface, and sealing with it;
(2) in crystallizing mould, charge and discharge pressure nitrogen gas by the air admission hole on the described observation window, the air that is enclosed in the seal closure is got rid of as much as possible, set up malleation;
(3) open ring packing tank two ends on the seal closure into and out of the water hole, and the cooling fluid that continuous circulation is provided suitable for reading by hydraulic cylinder;
(4) finish when casting, close nitrogen, close the apopore of the ring packing tank on the seal closure, the end opening by hydraulic cylinder provides cooling fluid, and hydraulic cylinder is descended, and makes sealing ring break away from burner simultaneously.
This casting technique is compared with existing casting technique and is had the following advantages:
1. equally the copper liquid level is protected, carbon black (shown in Figure 3) protection is the easiest, but effect is poor slightly and contaminated environment; With the complex operations inconvenience of producer gas mechanism, also there is the impurity problem in the restriction of the protected gas source of CO burning gas shield.Normal nitrogen filled protection is because of adopting malleation, can leak also into that air makes the oxygen uptake of copper liquid level, and the nitrogen protection under seal closure is protected more thorough than above-mentioned several technologies.
2. unavoidably there are various defectives in the normal pressure casting, the positive pressure of nitrogen casting has changed crust and has solidified pattern, the once cooling that copper liquid is transmitted by die wall reduces temperature and solidifies when crusting, under normal pressure, the shell that solidifies will haul when breaking away from die wall do not break away from die wall as yet shell down, (temperature when depending on casting when intermediate zone is narrower, amount of cooling water, factors such as casting speed), will cause high temperature liquid stream to invade the part that has become duricrust again also melts once more, continuous repeatedly, form cold shut thus, the cold shut of casting billet surface is modal problem.And under positive pressure, the copper liquid that does not break away from die wall as yet, tried hard to recommend downwards by malleation, the frictional force of die wall is no longer influential near the crust a point (shown in Figure 1), copper liquid takes the disengaging die wall to by transition and becomes its force-bearing situation of duricrust constant, only difference to some extent in size, (not having die wall friction power after breaking away from die wall) thereby casting billet surface are very bright and clean.
3. when malleation was cast, the copper liquid in the crystallizer was subjected to the pressure of even vertical direction, the corresponding increase of the density of strand, and the liquid cave flattens slow slightly, and the conduction of ingot blank internal heat is strengthened, and the top layer column crystal attenuates close, thereby can obviously improve the quality of ingot blank.
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the equipment positive seal equipment that is used for red copper malleation casting technique of the present invention;
Fig. 2 is fixed on the outer schematic top plan view of seal closure for Fig. 1 hydraulic cylinder;
Fig. 3 for existing be the equipment of the red copper casting technique of protected mode with cigarette ash;
Fig. 4 is for being the structural representation of protected mode with coal gas in Fig. 1 existing device;
Fig. 5 for existing be the equipment of the red copper casting technique of protected mode with the protective gas.
Fig. 1,2 is depicted as the equipment positive seal device that is used for red copper malleation casting technique of the present invention, comprising: a crystallizing mould 10 is installed on the crystallization die holder 11; One black box 20 comprises a seal closure 21, and it is the garden shape cover that stainless steel is made, and is welded with taper type observation window 22 at the one end, the copper liquid level situation when the placement quartz glass can allow operator see casting clearly by observation window on the observation window.Offer closable air admission hole 27 on the observation window 22.Seal closure 21 is slidably mounted on the described crystallization die holder 11, also offers an annular groove 24, one sealing rings 23 on the top of seal closure 21 and is installed in this annular groove 24.
Lowering or hoisting gear 30 is two hydraulic means, and they are installed on the smooth crystallization die holder 11 of outer wall symmetrically.Each hydraulic means comprises a hydraulic cylinder 32, and hydraulic cylinder is provided with inlet 33 and following inlet 34 (being called for short upper and lower mouthful).Side at crystallization die holder 11 is provided with a lug 13, and the bottom of the piston rod 35 of hydraulic means is fixed on this lug.
Hydraulic cylinder and seal closure are connected by bolt; Crystallizing mould 10 is installed on the crystallization die holder 11 by screw thread, and faying face is equipped with sealing ring 15, can guarantee that cooling water is not excessive from die orifice.The lower inner wall of seal closure 21 is provided with a sealed groove 25 that can hold sealing ring 26.
Seal closure 21 is provided with a ring packing tank 14 on the periphery wall below annular groove 24 near, the hole (not shown) on the suitable for reading 33 relative walls of this ring packing tank and hydraulic cylinder 32 is connected.
The crystallization die holder is a round piece, the centre has a circle limbers 37, the cooling water of sending to from outer water tube passes through die holder bottom annulus 36, limbers 37 along 20 φ 16 rises to 38 ejections of the mouth of a river, die holder top, current are sprayed directly on on the crystallizing mould 10 uniformly, by the high-temperature copper liquid in the die wall cooling frame, form once cooling.Water ring 12 is equipped with in the mould bottom, and primary cooling water directly is sprayed onto on the round base by water ring, forms secondary cooling water.
Glass on the observation window 22 is linked to each other with gland by sealing ring, and glass is consumable accessory, but changes conveniently.Glass is loosening in cover, will outwards be close on the rubber seal when malleation is set up.Because of the silica gel sealing ring on the seal closure is close to furnace bottom, be subjected to higher conduction heat, for guaranteeing its service life, establish a ring packing tank 14 in the seal groove bottom.The emulsion of sending to when hydraulic cylinder is returned liquid from feed liquor bottom, piston rod top during at the jacking seal closure, when jacking put in place be close to furnace bottom after, one in two cylinders are by the piston tip feed liquor, another returns liquid by piston tip, also be the cooling hole feed liquor of emulsion by linking to each other of a cylinder, reflux from another cylinder back pressure with cylinder.When back pressure transferred to the 0.05Mpa left and right sides, the assurance seal closure still can be close to furnace bottom, and this moment, the emulsion of circulation just played cooling effect, guaranteed only heat ageing of silica gel sealing ring.
Red copper malleation casting technique may further comprise the steps:
When casting finish is prepared in the refining of copper liquid, burner is tumbled to the level position, depositing faces the crystallizer center, primer fluid pressure device 30, the seal closure 21 on the positive seal assembly by piston rod 35 jackings of hydraulic cylinder 31 to burner baseplane 50, and sealing with it.
Charge and discharge nitrogen by the air admission hole on the observation window 22 27 in crystallizer mould 10, the air that is enclosed in the seal closure is got rid of as far as possible, have slit still can not set up pressure because of dummy bar head and crystallizer this moment; Treat the stopper switch opens, copper liquid is banished to the dummy bar head place by depositing, is full of copper liquid in the crystallizer soon, promptly sets up malleation in the seal closure.Malleation is transferred between 0.04～0.07MPa, can normally cast.The adjustment one of pressure size is by the nitrogen switch, the 2nd, and by the seal closure device.If the pressure of setting up is lower than 0.04MPa, then need change sealing gasket again.Nitrogen is by enter seal closure after flowmeter and the heating, have heated nitrogen to be filled on the copper liquid level in the casting overall process, formed the malleation casting technique always.
After normal semi-continuous casting process is established, open ring packing tank 14 on the seal closure 21 into and out of the water hole, the cooling pressure emulsion of continuous circulation is provided by the last inlet 33 of hydraulic cylinder 32.
Along with dummy bar descends, shaping strand 612 also constantly is pulled out crystallizer, when copper liquid has watered soon in the stove, the stopper switch is shut, and continues to keep malleation, shuts the nitrogen switch when seeing that in glass peephole 22 copper liquid surface is all solidified.When treating that the internal mask pressure table is back to zero, the burner of tumbling is to normal position, and the following inlet 34 by hydraulic cylinder provides the pressure emulsion, and hydraulic cylinder 32 reverse feed liquors descend hydraulic cylinder, and seal closure is returned to outside the die holder, whole casting process end.
Casting embodiment: on the 300kg power frequency induction furnace, with crystallizing mould and furnace bottom sealing, fill the into pressure of 0.04Mpa with seal closure, normal casting.The strand that only adds the cigarette ash protection is compared, and density is by 8.90g/cm
3Bring up to 8.92g/cm
3, the casting billet surface color and luster orangely becomes golden yellowly by dark, and casting billet surface cold shut line is eliminated substantially, embodies the vitality of malleation casting.Red copper routine casting density all is 8.90g/cm
3About, density can be improved 0.02g/cm
3, illustrating that the casting process protection is very abundant, the crystallization pattern changes to some extent, and the copper liquid level is steady under pressure state, and the internal crystallization process is also steady, so crystalline structure is thinner clean.
The present invention finishes under the prerequisite of copper liquid level atmosphere protection at the same time, develops a kind of pressure casting process again.
Claims (7)
1. the positive seal device on the red copper crystallizing mould, comprise: a crystallizing mould (10), it is installed on the crystallization die holder (11), crystallization die holder bottom is provided with a water ring (12), it is characterized in that: also comprise a black box (20) and a lowering or hoisting gear (30), described black box (20) comprises a seal closure (21), and a sealing ring (23) and is installed on the observation window (22) on the seal closure (21), offers closable air admission hole (27) on this observation window;
Described seal closure (21) is slidably mounted on the described crystallization die holder (11), also offers an annular groove (24) on the top of seal closure (21), and described sealing ring (23) is installed in this annular groove (24);
Described lowering or hoisting gear (30) is two hydraulic means, and they are installed on the described crystallization die holder (11) symmetrically.
2. positive seal device according to claim 1, it is characterized in that: described each hydraulic means comprises a hydraulic cylinder (32), hydraulic cylinder is provided with upper and lower inlet (33,34), one side of described crystallization die holder (11) is provided with a lug (13), and the bottom of the piston rod of hydraulic means (35) is fixed on this lug.
3. positive seal device according to claim 1 is characterized in that: also be provided with one on the lower inner wall of described seal closure (21) and can hold the sealed groove (25) of sealing ring (26).
4. positive seal device according to claim 1, it is characterized in that: described seal closure (21) is on the periphery wall of the nearly below of described annular groove (24), be provided with a ring packing tank (14), the hole on (33) suitable for reading relative wall of this ring packing tank (14) and hydraulic cylinder (32) is connected.
5. red copper malleation casting technique is characterized in that it may further comprise the steps:
(1) when the refining of copper liquid finishes to prepare casting, start lowering or hoisting gear (30), make the seal closure (21) on the described positive seal assembly be raised to the burner bottom surface, and sealing with it;
(2) charge and discharge pressure nitrogen gas by the air admission hole (27) on the described observation window (22) in crystallizing mould (10), the air that will be enclosed in the seal closure (21) is got rid of as much as possible, sets up malleation;
(3) open ring packing tank (14) two ends on the seal closure (21) into and out of the water hole, and provide the cooling fluid of continuous circulation by (33) suitable for reading of hydraulic cylinder (32);
(4) finish when casting, close nitrogen, close the apopore of the ring packing tank (14) on the seal closure (21), the end opening (34) by hydraulic cylinder (32) provides cooling fluid, and hydraulic cylinder is descended, and makes sealing ring (23) break away from burner (50) simultaneously.
6. red copper malleation casting technique according to claim 5 is characterized in that: described cooling fluid is the pressure emulsion.
7. red copper malleation casting technique according to claim 5 is characterized in that: described positive pressure pressure is 0.04～0.07MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116394 CN1115216C (en) | 2000-06-08 | 2000-06-08 | Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00116394 CN1115216C (en) | 2000-06-08 | 2000-06-08 | Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1327893A CN1327893A (en) | 2001-12-26 |
| CN1115216C true CN1115216C (en) | 2003-07-23 |
Family
ID=4585798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00116394 Expired - Fee Related CN1115216C (en) | 2000-06-08 | 2000-06-08 | Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1115216C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107737895A (en) * | 2017-11-29 | 2018-02-27 | 江苏鑫海铜业有限公司 | A kind of oxygen-free copper bar preparation method |
| CN111390132B (en) * | 2020-04-22 | 2021-08-06 | 江苏隆达超合金股份有限公司 | Anti-oxidation casting method for B30 alloy cast ingot |
-
2000
- 2000-06-08 CN CN 00116394 patent/CN1115216C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1327893A (en) | 2001-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1270503A (en) | Ladle furnace | |
| CN1115216C (en) | Positive-pressure sealer of red copper crystallizing mould and positive-pressure casting technology for red copper | |
| EP1742870B1 (en) | Method and installation for the production of blocks of a semiconductor material | |
| CN109897922A (en) | A kind of large-scale metallurgical slag ladle | |
| CN111763833B (en) | Oxygen-enriched bottom blowing converting furnace for converting liquid copper matte into copper | |
| CN209035415U (en) | A kind of sealed feed trumpet | |
| CN109825655A (en) | A kind of large-scale metallurgical slag ladle manufacturing method | |
| CN111390132B (en) | Anti-oxidation casting method for B30 alloy cast ingot | |
| CN214867218U (en) | Detachable external heat insulation structure of casting machine | |
| CN114309570A (en) | Steel ladle flow control device for preventing molten steel from solidifying | |
| CN214735880U (en) | Converter slag stopping composite sliding plate device | |
| CA1077266A (en) | Enclosure for steel converting apparatus | |
| CN109883206B (en) | High-speed cooling device for smelting of vacuum consumable furnace | |
| CN113441727B (en) | Vacuum melting aerosol furnace and material smashing and slag pushing device thereof | |
| KR100777234B1 (en) | Eccentric bottom tapping opener of electrode arc furnace | |
| CN216828635U (en) | Steel ladle flow control device for preventing molten steel from solidifying | |
| CN111014593B (en) | Cover plate lifting control mechanism for ductile iron spheroidization and assembly operation method | |
| US3723631A (en) | Skull melting furnace with removable bottom and process for furnace operation | |
| KR900000086B1 (en) | Apparatus for sealing the skirt of a converter waste gas recovery system | |
| CN111321277A (en) | Oxygen lance protection device of vacuum refining furnace | |
| CN1023085C (en) | Method to make refractory pot for casting steel billet | |
| CN213172080U (en) | Protective equipment for electric smelting magnesium kiln | |
| CN217733228U (en) | Electroslag furnace | |
| CN213475140U (en) | Hanging device for casting oil cylinder | |
| CN211516020U (en) | Novel round copper ingot copper alloy casting mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |