CN86201310U - Round hot top with double insulating layers - Google Patents
Round hot top with double insulating layers Download PDFInfo
- Publication number
- CN86201310U CN86201310U CN 86201310 CN86201310U CN86201310U CN 86201310 U CN86201310 U CN 86201310U CN 86201310 CN86201310 CN 86201310 CN 86201310 U CN86201310 U CN 86201310U CN 86201310 U CN86201310 U CN 86201310U
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- CN
- China
- Prior art keywords
- cap
- hot top
- heat preservation
- wall
- insulation
- 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 - Lifetime
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model discloses a heat preservation cap used for steel making and ingot casting. The existing heat preservation cap is in the square or rectangular shape, the radiating area is large, and the thermal insulation and heat preservation effect is not good. Therefore, a circular or oval heat preservation cap is adopted in the utility model. The cap wall is provided with a deep groove, and heat insulation fillers such as charring rice hull and vermiculite powder are filled in the deep groove. Double layer heat insulation is implemented by hanging a heat insulation board in the inner wall of the cap. The volume of the cap is reduced by one third, and the metal loss of the corner part of the heat preservation cap is decreased. The rate of finished products is improved, and thermal loss is reduced. The rate of finished products of the heavy rail steel reaches to 86.82%, the rate of finished products of the straight carbon steel reaches to 87.7%, and the original model design is not changed.
Description
The utility model relates to a kind of steel-making ingot casting hot top.
Bigger its profile of ingot mould hot top or interior shape all is square or rectangle both at home and abroad at present, because its surface area is big, thereby rapid heat dissipation, increased the especially condensation rate of hot top bight metal of box-hat portion, though through taking other insulation measures, but also be difficult to guarantee that cap portion metal is in the shrinkage cavity that molten condition forms to replenish steel ingot body part solidification shrinkage, cause the corresponding increase of steel ingot shrinkage cavity, increased the crop loss when rolling.The metallargist has adopted various methodologies to improve the billet yield of steel ingot for many years, and one of wherein more general method is the cap portion volume that reduces killed ingot.Though adopt this method can obtain some effects, but often ignored the insulation measure of cap portion, along with reducing of cap portion volume, the also corresponding change of the physics of ingot head and metallurgical state, defectives such as ingot head shrinkage cavity are increased to some extent, thereby limited the further raising of steel ingot billet yield.
In order to increase heat insulation effect, countries in the world generally adopt hot top to add the method for heat-insulating shield, external even take special facture adiabatic heat-insulation device or add a cover the insulation gland, add various measures such as exothermic mixture, although all correspondingly played certain effect, but its complex process, operating difficulties, what have need special processing and fabricating, makes to consume and the cost increase.
Russian Patent is introduced for No. 925530 and is a kind ofly made back boxing with heat resistance concrete, and several vertical hole slots are arranged in the back boxing, filling expansion vermiculite in hole slot, and the hole slot distance is 1.2～2.5 times an insulation insulation method of its diameter.A kind of hot top with vessel form of these No. 480489 patent introductions of state is that hot top innner and outer wall is formed vestibule as sidewall, scribble carbonate coating on the vestibule wall, utilize the liquid slag that flows in the vestibule to become carbon dioxide to strengthen heat insulation capacity carbonate decomposition.But because vestibule than wide in width wall attenuate, makes reduce the service life of hot top under the temperature stress effect.
The purpose of this utility model is to provide that a kind of cap portion volume is little, insulation effect good, the steel ingot hot top of long service life.
The production actual observation is found, though type all is square or rectangle in bigger ingot mould and the hot top, but formed shrinkage cavity but is similar to circularly or oval-shaped basically behind the ingot solidification, and its main cause is because cool off in the bight of square or rectangle hot top comparatively fast causes.For this reason, the utility model becomes cap portion shaped design the circular hot top that matches with the steel ingot shrinkage cavity form.In order not change original ingot shape design and to make full use of original ingot mould, therefore circular hot top end opening has a narrow intermediate zone, makes it carry out the transition to square or rectangle by circle, to match with ingot mould.When being used to pour into a mould slab ingot, the utility model can suitably add straightway in the middle part according to the actual conditions and the size of slab ingot, makes the hot top ovalize.
Obviously, the area of dissipation of circular hot top and cap portion volume be than square or rectangle is much smaller, area of dissipation dwindle the improvement that also means the adiabatic heat-insulation state simultaneously.In addition, the utility model also is provided with on the hot top wall and the consistent deep trouth of cap wall tapering, but filling heat-insulating property filler preferably in the groove, as refractory fibre, asbestos plaster, charring rice husk, vermiculite power etc.The hot top inwall also can be hung heat-insulating shield, has realized double-deck thermal insulation.This method also can be used for the up-small and down-big ingot mould of not attaching the names of pre-determined candidates, and when the cast steel ingot mould microcephaly is cast out deep trouth and can reach this effect.
Accompanying drawing 1 and accompanying drawing 2 are respectively front view of the present utility model and vertical view.1 is cast iron cap wall among the figure, and the cap wall is provided with deep trouth 2, and the cap end opening has intermediate zone 3, and its each size is determined according to ingot shape and shape for hat actual conditions.Accompanying drawing 3 adopts the situation of double-deck adiabatic circular hot top for big-end-up mould.4 is the heat-insulating shield that is hung on the cap inwall, the 5th, and the filled insulation of filling in deep trouth, 6 is ingot mould.
Since the utility model will be former square or rectangle cap change circular cap into, therefore, in the situation of equal height, make cap section volume dwindle three/in the lump and guarantee to match with shrinkage cavity form, the metal in bight is reclaimed, thereby the billet yield of raising steel ingot.
Circular hot top area of dissipation has reduced 30% than square or rectangle, and realized double-deck thermal insulation, and improved the insulation insulation effect of box-hat section, make ingot head be in more excellent physics and metallurgical state, both guarantee ingot quality, reduced again the heat loss of cap section.
The utility model is evenly distributed the temperature stress of cap wall owing to adopt the circle shape for hat, and the in addition protective effect of heat-insulating shield and filled insulation can remedy the impact of cap wall fluting, the service life of relatively improving circular cap. This shape for hat does not change original ingot mould design, so technology is simple, is convenient to generally apply.
The utility model has carried out steel grades such as high-carbon, middle carbon and low-carbon (LC) at Anshan iron and steel plant big production application test has obtained good effect.For the Properties of Heavy Rail Steel By of carbon content height and steel and performance requirement strictness, its billet yield reaches 86.82%, and the straight carbon steel billet yield reaches 87.7%, and flaw detection is picked out rate and reduced by 3.5%, and the ratio of first-grade products improves 1.17%, and the macrostructure check is all qualified.
Claims (2)
1, a kind of steel-making ingot casting hot top, interior wall hanging heat-insulating shield [4] forms through casting.It is characterized in that hot top is circular or oval, the deep trouth [2] consistent with cap wall [1] tapering arranged on the cap wall [1], the cap end opening has a narrower intermediate zone [3].
2, hot top according to claim 1 is characterized in that filled insulations (5) such as filling charring rice husk, vermiculite power in cap wall deep trouth (2), realizes double-deck adiabatic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201310 CN86201310U (en) | 1986-03-14 | 1986-03-14 | Round hot top with double insulating layers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201310 CN86201310U (en) | 1986-03-14 | 1986-03-14 | Round hot top with double insulating layers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86201310U true CN86201310U (en) | 1987-04-29 |
Family
ID=4805098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86201310 Expired - Lifetime CN86201310U (en) | 1986-03-14 | 1986-03-14 | Round hot top with double insulating layers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86201310U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317109A (en) * | 2012-03-19 | 2013-09-25 | 宝山钢铁股份有限公司 | Method for weakening corner part heat transmission of continuous casting crystallizer |
| CN103406504A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Ingot mold dead head thermal insulation device |
| CN112620589A (en) * | 2020-12-18 | 2021-04-09 | 陕西法士特汽车传动集团有限责任公司 | Riser bush and casting method based on riser bush |
-
1986
- 1986-03-14 CN CN 86201310 patent/CN86201310U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103317109A (en) * | 2012-03-19 | 2013-09-25 | 宝山钢铁股份有限公司 | Method for weakening corner part heat transmission of continuous casting crystallizer |
| CN103406504A (en) * | 2013-07-16 | 2013-11-27 | 辽宁科技大学 | Ingot mold dead head thermal insulation device |
| CN112620589A (en) * | 2020-12-18 | 2021-04-09 | 陕西法士特汽车传动集团有限责任公司 | Riser bush and casting method based on riser bush |
| CN112620589B (en) * | 2020-12-18 | 2023-02-21 | 陕西法士特汽车传动集团有限责任公司 | Riser bush and casting method based on riser bush |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |