CN101745619A - Batch water-cooling technology for inhibiting deformation of bottom of aluminum alloy ingot - Google Patents
Batch water-cooling technology for inhibiting deformation of bottom of aluminum alloy ingot Download PDFInfo
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- CN101745619A CN101745619A CN200810244171A CN200810244171A CN101745619A CN 101745619 A CN101745619 A CN 101745619A CN 200810244171 A CN200810244171 A CN 200810244171A CN 200810244171 A CN200810244171 A CN 200810244171A CN 101745619 A CN101745619 A CN 101745619A
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Abstract
The invention provides a batch water-cooling technology for inhibiting the deformation of the bottom of an aluminum alloy ingot, which is characterized in that a flow control valve is arranged in front of the main water inlet pipeline of a crystallizer to control the flow of cooling water flowing into the crystallizer, or the control valve also can be arranged on the wide side or narrow side water inlet pipeline of a slab ingot crystallizer to control the flow of cooling water on the wide side or narrow side of the crystallizer; the flow control valve of the crystallizer water inlet pipeline can be controlled by program, and can be instantly opened and closed; a water valve rotates back and forth to supply water in batch to the crystallizer when in initial casting, when the length of ingot reaches to a certain value, the water supply mode of the crystallizer transits to the continuous mode when the water valve is fully opened. With the method, the warping degree of the bottom of an ingot can be obviously reduced and the yield of ingot is improved.
Description
Technical field
The present invention relates to a kind of batch water-cooling technology that suppresses deformation of bottom of aluminum alloy ingot, belong to the aluminum alloy semi-continuous casting technical field.
Background technology
Aluminium and aluminium alloy cast ingot mainly are to provide ingot blank for rolling and extruded product, the preparation of ingot casting is the preceding working procedure of alloy product, ingot quality plays decisive role to the product quality of follow-up aluminium processing material, and the inadequate natural endowment of ingot quality tends to be difficult to remedy in road, back distortion operation and causes waste product.
The distortion of ingot casting bottom warp is the main and common deficiency that aluminium alloy flat bloom is produced, because solidification shrinkage, the ingot casting bight is subjected to pulling force upwards and breaks away from bottom the dummy ingot, forms arc-shaped deformation, is commonly called as " warpage ".The ingot casting warpage degree increases along with the increase of slab ingot specification and flakiness ratio.Before subsequent hot rolled, for quality and the lumber recovery that guarantees hot-rolled product, the ingot casting bottom that warpage takes place must be cut away.And the hard aluminum alloy flat bloom relatively poor for casting character, that intensity is higher, the distortion of serious bottom warp usually can make at first cracking of ingot casting bottom, thereby and upwards is through to whole ingot casting and causes scrapping of whole ingot casting product all the time.
Summary of the invention
It is serious to the present invention is directed to the bottom warp of aluminum alloy ingot distortion, cause casting the low problem of lumber recovery, a kind of batch water-cooling technology that suppresses deformation of bottom of aluminum alloy ingot is provided, and adopting said method can significantly reduce ingot casting bottom warp degree, improves the ingot casting lumber recovery.
Purpose of the present invention is achieved through the following technical solutions:
The batch water-cooling technology that suppresses deformation of bottom of aluminum alloy ingot, characteristics are: before crystallizer water inlet manifold road flow control valve is installed, the control cooling water is instantaneously opened, instantaneous closing, when flow control valve is opened fully, inlet pipeline is the normal water flow, when flow control valve cut out fully, inlet pipeline discharge reduced to zero; The duration that flow control valve opens and closes fully automatically performs according to program setting;
In the casting starting stage ingot casting is carried out batch (-type) water supply cooling, promptly before semi-continuous casting begins, the operation flow control valve, the time that the flow-control valve body is opened fully is controlled at 0.5～5s, the time that valve body is closed fully is controlled at 0.5～10s, and the cycle of operation of flow-control valve body single open and close is 1～15s; After casting technique satisfies the setting requirement, open al molten bath control stream stopper, the semi-continuous casting process begins, and controlled by flow control valve, and the discharge on crystallizer water inlet manifold road is clearance-type and changes, and also is the batch (-type) of same frequency to the ingot casting water supply type of cooling; Behind the casting certain hour, flow control valve changes full-gear gradually into, and the crystallizer way of supplying water is a continous way by the batch (-type) transition gradually also, and casting process enters the stabilization sub stage.
Further, the batch water-cooling technology of above-mentioned inhibition deformation of bottom of aluminum alloy ingot, behind the casting certain hour, ingot casting length is at 100～1000mm, and flow control valve changes full-gear gradually into.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
The present invention installs flow control valve before crystallizer water inlet manifold road, control flows to the cooling water flow in the crystallizer; Control valve can instantaneously open and close by programme-control; Cast water valve reciprocating operation when initial, crystallizer is implemented batch (-type) supply water, after ingot casting length reached certain value, water valve was opened gradually fully, and the transition of crystallizer way of supplying water is a continous way.Adopt this method can significantly reduce ingot casting bottom warp degree, improve the ingot casting lumber recovery, economic benefit and social effect are remarkable.
The specific embodiment
The present invention suppresses the crystallizer batch (-type) method of supplying water of aluminium alloy flat ingot casting bottom warp distortion, and control valve is installed on crystallizer water inlet manifold road, and control flows to the cooling water flow in the crystallizer.Also control valve can be installed on wide of flat ingot mould or leptoprosopy inlet pipeline, the cooling water flow of wide of crystallization control device or leptoprosopy.The crystallizer water inlet pipeline flow control valve can instantaneously open and close by programme-control.Cast water valve reciprocating operation when initial, crystallizer is implemented batch (-type) supply water, after ingot casting length reached certain value, water valve was opened gradually fully, and the transition of crystallizer way of supplying water is a continous way.Specifically comprise following aspect:
1) batch (-type) water system: before crystallizer water inlet manifold road, design and installation can control that cooling water is instantaneously opened, instantaneous flow control valve of closing.When flow control valve was opened fully, inlet pipeline was the normal water flow, and when flow control valve cut out fully, inlet pipeline discharge reduced to zero.The duration that flow control valve opens and closes fully automatically performs according to program setting.The reciprocating motion that native system continues to open and close by flow control valve realizes that the batch (-type) of crystallizer supplies water.In addition, according to the needs of technology, flow control valve can be contained in wide of flat ingot mould or the leptoprosopy inlet pipeline, by the motion realization of application valve body the pulse on ingot casting surface is supplied water.
2) cooling means: ingot casting is carried out batch (-type) water supply cooling in the casting starting stage.Before semi-continuous casting begins, operation cooling water flow control valve, the time that valve body is opened fully is controlled to be 0.5～5s, and the time that valve body is closed fully is controlled to be 0.5～10s, and the cycle of operation of valve body single open and close is 1～15s.After casting technique satisfies the setting requirement, open al molten bath control stream stopper, the semi-continuous casting process begins.Controlled by the flow valve body, the discharge on crystallizer water inlet manifold road is that clearance-type changes, and also is the batch (-type) of same frequency to the ingot casting water supply type of cooling.When the casting certain hour, after ingot casting length reached certain value, flow control valve changed full-gear gradually into, and the crystallizer way of supplying water is a continous way by the batch (-type) transition gradually also, and casting process enters the stabilization sub stage.When flow control valve was installed on wide of flat ingot mould or leptoprosopy inlet pipeline, cooling means was with above-mentioned consistent.
The ingot casting length that adopts the casting of batch (-type) water supply method in the casting starting stage and aluminium alloy kind, ingot casting specification are relevant with casting technique.For 400 * 1320mm 7 * * * the line aluminium alloy slab ingot, adopting the ingot casting length range of batch (-type) process for cooling casting is 100～1000mm.
The inventive method is suitable for aluminium alloy flat bloom semi-continuous casting process, in conjunction with 400 * 1320mm commercial-purity aluminium slab ingot casting example, embodiment of the present invention is described further:
1. melting and melt treatment: the technical pure aluminium ingot is put into the melting of 5t resistance-heated furnace, aluminium ingot fusing back melt temperature is controlled at 720～780 ℃, adopt high pure nitrogen to carry out degasification, adopt refining agent and slagging agent that aluminum melt is carried out refining and slag hitting processing, left standstill 10～15 minutes; When reducing to 740～750 ℃, prepares melt temperature casting.
2. semi-continuous casting: before semi-continuous casting begins, open water inlet manifold road flow control valve, set control program, make water valve open time≤3.5s fully, complete shut-in time≤3s, the cooling water total flow is 30～35m in the water valve action cycle≤5s, crystallizer
3/ h.Open molten bath control stream stopper, the commercial-purity aluminium melt slowly flows in the crystallizer, the casting process of beginning 400 * 1320mm commercial-purity aluminium slab ingot.Casting technique is as follows: 690～710 ℃ of casting temperatures, casting speed: 50～60mm/min, cooling water flow: 30～35m
3/ h, crystallizer way of supplying water: with the synperiodic batch (-type) of water valve.After ingot casting length reached 400mm, casting technique became: 690～710 ℃ of casting temperatures, casting speed: 60～90mm/min, cooling water flow: 35～45m
3/ h, crystallizer way of supplying water: continuous water supply.When ingot casting length is 1500mm time control stream stopper jam-pack molten bath aluminium flowing-out mouth gradually, casting speed slowly descends, and casting process finishes.Adopt the commercial-purity aluminium slab ingot of above-mentioned technology preparation, warpage 10mm makes progress through measurement ingot casting bight.
In order to compare checking, guaranteeing that water inlet manifold road flow control valve is in full open position all the time under the constant prerequisite of casting technique, crystallizer supplies water to ingot casting continuously and implements cooling, the commercial-purity aluminium slab ingot of preparation, the ingot casting bight warpage 52mm that makes progress after testing, and the bottom is circular arc.
By contrast test as seen, adopt crystallizer batch (-type) method of supplying water of the present invention significantly to suppress the bottom warp distortion of flat ingot casting.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (2)
1. the batch water-cooling technology that suppresses deformation of bottom of aluminum alloy ingot, it is characterized in that: before crystallizer water inlet manifold road, flow control valve is installed, the control cooling water is instantaneously opened, instantaneous closing, when flow control valve is opened fully, inlet pipeline is the normal water flow, when flow control valve cut out fully, inlet pipeline discharge reduced to zero; The duration that flow control valve opens and closes fully automatically performs according to program setting;
In the casting starting stage ingot casting is carried out batch (-type) water supply cooling, promptly before semi-continuous casting begins, the operation flow control valve, the time that the flow-control valve body is opened fully is controlled at 0.5～5s, the time that valve body is closed fully is controlled at 0.5～10s, and the cycle of operation of flow-control valve body single open and close is 1～15s; After casting technique satisfies the setting requirement, open al molten bath control stream stopper, the semi-continuous casting process begins, and controlled by flow control valve, and the discharge on crystallizer water inlet manifold road is clearance-type and changes, and also is the batch (-type) of same frequency to the ingot casting water supply type of cooling; Behind the casting certain hour, flow control valve changes full-gear gradually into, and the crystallizer way of supplying water is a continous way by the batch (-type) transition gradually also, and casting process enters the stabilization sub stage.
2. the batch water-cooling technology of inhibition deformation of bottom of aluminum alloy ingot according to claim 1 is characterized in that: behind the casting certain hour, ingot casting length is at 100～1000mm, and flow control valve changes full-gear gradually into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810244171A CN101745619A (en) | 2008-12-18 | 2008-12-18 | Batch water-cooling technology for inhibiting deformation of bottom of aluminum alloy ingot |
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| CN200810244171A CN101745619A (en) | 2008-12-18 | 2008-12-18 | Batch water-cooling technology for inhibiting deformation of bottom of aluminum alloy ingot |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691896A (en) * | 2013-12-20 | 2014-04-02 | 西南铝业（集团）有限责任公司 | Aluminum alloy ingoting method for railway vehicle chassis plate |
| CN104368773A (en) * | 2014-12-05 | 2015-02-25 | 西南铝业（集团）有限责任公司 | Hard aluminum alloy casting crystallizer and pulse water pipeline thereof |
| CN110576160A (en) * | 2019-09-26 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | control system and method for crystallizer water of continuous casting machine |
-
2008
- 2008-12-18 CN CN200810244171A patent/CN101745619A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103691896A (en) * | 2013-12-20 | 2014-04-02 | 西南铝业（集团）有限责任公司 | Aluminum alloy ingoting method for railway vehicle chassis plate |
| CN104368773A (en) * | 2014-12-05 | 2015-02-25 | 西南铝业（集团）有限责任公司 | Hard aluminum alloy casting crystallizer and pulse water pipeline thereof |
| CN110576160A (en) * | 2019-09-26 | 2019-12-17 | 中冶赛迪工程技术股份有限公司 | control system and method for crystallizer water of continuous casting machine |
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Open date: 20100623 |