CN201926294U - Compound inner liner for coreless induction furnace - Google Patents
Compound inner liner for coreless induction furnace Download PDFInfo
- Publication number
- CN201926294U CN201926294U CN2010205623400U CN201020562340U CN201926294U CN 201926294 U CN201926294 U CN 201926294U CN 2010205623400 U CN2010205623400 U CN 2010205623400U CN 201020562340 U CN201020562340 U CN 201020562340U CN 201926294 U CN201926294 U CN 201926294U
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- China
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- slag
- induction furnace
- coreless induction
- lining
- dry type
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- Expired - Fee Related
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
A compound inner liner for a coreless induction furnace comprises a dry material linear (1), fireproof mud (2) and a slag resistive circular ring (3), which is arranged at the inner side of a slag ring belt of the dry material linear (1) and totally covers the slag ring belt of the dry material linear (1). The fireproof mud (2) fills gaps between the dry material linear (1) and the slag resistive circular ring (3). The conical degree of the external side of the slag resistive circular ring (3) is identical to that of the inner side of the slag line part of the dry material linear (1). The slag resistive circular ring (3) employs highly-compacted carbonaceous refractory materials formed by isostatic pressing or mechanical pressing. The radial thickness of the slag resistive circular ring (3) ranges from 20mm to 200 mm. The compound inner liner for a coreless induction furnace has longer service lifetime under a continuous production condition. The production efficiency is improved, and the comprehensive cost of the refractory materials smelted by the coreless induction furnace is greatly reduced.
Description
Technical field
The utility model relates to a kind of technical field of metallurgical equipment, specifically a kind of coreless induction furnace compound lining.
Background technology
Compare with electric-arc furnace steelmaking, coreless induction furnace has that programming rate is fast, furnace temperature is controlled easily, the precious metal scaling loss is few, gained metal quality height, advantage such as energy-saving and environmental protection more, so the use of coreless induction furnace in casting industry is very general.In recent years, along with the expansion of domestic steel scrap market scale, big-and-middle-sized coreless induction furnace steel-making was adopted more and more in the metallurgy industry.
The liner of coreless induction furnace mainly contains 2 kinds, and a kind of is the preformed crucible, and a kind of is dry-type vibration material or ramming mass.In small-sized coreless induction furnace, be subjected to the restriction in coreless induction furnace stove internal cavity space, automatically brickwork equipment is difficult to carry out the work, if adopt the preformed crucible, it is convenient then to have an installation, and anti-molten metal washes away, the ability of scouring is strong, service life advantage such as height, but its shortcoming is to use the stability in life-span to be not so good as dry-type vibration material, to be difficult for repairing, and the restriction of being transported, so the preformed crucible just can demonstrate its superiority in the use of the coreless induction furnace below 2 tons.But in the construction of big-and-middle-sized coreless induction furnace, along with the fast development of automatic brickwork equipment, the construction of the dry type material installation than preformed crucible on the contrary is more quick, and therefore liner almost all adopts dry-type vibration material in big-and-middle-sized coreless induction furnace.
In the coreless induction furnace smelting process, the slag lining of furnace lining is easily damaged position.As shown in Figure 1, this coreless induction furnace is followed successively by furnace shell 6, induction coil 5 and dry type material liner 1 from outside to inside, the slag lining of dry type material liner 1 corrodes fast than other position, after dry type material liner 1 uses certain stove number, form a ring-type zanjon 4 at slag lining, since the preferential attenuation of slag lining furnace lining, and whole dry type material liner 1 was lost efficacy.The main cause of the slag lining damage of furnace lining is as follows: at first, at the slag liquid level of coreless induction furnace, temperature is low than the bottom, and the intensity of this place's dry type material working lining is lower than the intensity of molten pool working layer, and the ability that anti-molten steel and liquid slag are washed away is not as good as the position, molten bath.Secondly, coreless induction furnace is higher with the apparent porosity of dry type material behind sintering, general above 20%, high apparent porosity causes the anti-slag penetrating power of dry type material relatively poor, the flowability infiltration of liquid slag to dry type material working lining inside preferably causes the dry type material to form metamorphic layer in the scope of distance working face certain depth, occurs peeling off in follow-up use and quickens at the metamorphic layer that has significant difference on the physicochemical property with the protoplasm layer and damage.The 3rd, slag dissolves damage to dry type material liner.Slag lining dry type material liner erosion resistibility is lower, and the infiltration that adds slag causes peels off damage and molten damage, makes that working lining becomes the fastest position of damage near the coreless induction furnace slag line.
Adopt the coreless induction furnace of clearance-type production technology, can under the low temperature after the coreless induction furnace blowing out, carry out cold repair and mend,, reduce the ton steel refractory material cost that coreless induction furnace is smelted to improve the service life of coreless induction furnace furnace lining to slag lining.But, for the very full producer of many production tasks, in order to devote exclusive attention to output, coreless induction furnace can only continuously be smelted operation, slag lining is not carried out the condition that cold conditions is repaired, under the continuous production processes condition, restrict the short slab that lining durability improves so the quick damage of slag lining becomes coreless induction furnace.
Summary of the invention
For the easily damaged problem of the slag lining that solves the coreless induction inner lining of furnace, the utility model provides a kind of coreless induction furnace compound lining, carry out reinforcement by slag lining to the single dry type material liner of coreless induction furnace, make coreless induction furnace under quantity-produced technology prerequisite, the damage speed of slag lining and the damage speed at position, molten bath realize synchronously, thereby improve the service life of slag lining and the bulk life time of coreless induction furnace furnace lining, make coreless induction furnace when enhancing productivity, reduce ton steel smelting refractory material integrated cost.
The coreless induction furnace that the utility model provides comprises with compound lining: dry type material liner, fire clay and anti-slag annulus, described anti-slag annulus is arranged on the slag line endless belt inboard of described dry type material liner, cover dry type material liner slag line endless belt fully, adopt fire clay to carry out joint filling between anti-slag annulus and the dry type material liner.
Preferably, has identical tapering with dry type material liner slag lining inboard outside the described anti-slag annulus.
Preferably, the radial thickness of described anti-slag annulus is between 20 ~ 200 mm.
Described anti-slag annulus can be the compact refractory material of routine, for example is the high fine and close carbon containing refractory that employing waits static pressure or mechanical pressing.
Technique scheme of the present utility model has the following advantages: the slag lining of dry type material furnace lining is carried out anti-slag annulus that reinforcement uses slag lining and the certain stove number of slag insulation blocking with dry type material liner; up to anti-slag annulus be etched wear after; the slag lining of dry type material furnace lining just contacts with molten steel with slag; slag and molten steel just begin the slag lining of dry type material liner is carried out physics and chemical erosion, and anti-slag annulus is the stove number that improves in the compound Lining life-span to the insulation blocking stove number of dry type material liner slag lining.Particularly anti-slag annulus adopts under the situation of high fine and close carbonaceous material, described coreless induction furnace has excellent slag resistance with compound lining, for single dry type material liner, improve the service life of compound lining greatly, when enhancing productivity, a ton steel smelting refractory material cost is reduced significantly.
Description of drawings
Fig. 1 is a schematic diagram of producing the coreless induction furnace damage in the prior art continuously;
Fig. 2 is the schematic diagram of the utility model coreless induction furnace compound lining;
Mark refers to as follows among the figure: 1-dry type material liner, 2-fire clay, the anti-slag annulus of 3-, 4-ring-type zanjon, 5-induction coil, 6-furnace shell.
The specific embodiment
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail below.
As shown in Figure 2, it is a preferred embodiment of the utility model coreless induction furnace compound lining, described coreless induction furnace comprises with compound lining: dry type material liner 1, fire clay 2 and anti-slag annulus 3, described anti-slag annulus 3 is arranged on the slag line endless belt inboard of described dry type material liner 1, cover dry type material liner 1 slag line endless belt fully, adopt fire clay 2 to carry out joint filling between anti-slag annulus 3 and the dry type material liner 1.
Described anti-slag annulus 3 outsides have identical tapering with dry type material liner 1 slag lining inboard; Described anti-slag annulus 3 is for adopting the high fine and close magnesium carbon refractory of isostatic compaction; The radial thickness of described anti-slag annulus 3 is 50 mm.
When the smelting low carbon steel alloy, the average erosion rate of anti-slag annulus is at the 1.0mm/ heat, promptly anti-slag annulus is washed away, is corroded by molten steel and slag and can use about 50 heats before wearing, and the dry type material liner of slag lining just continuation contacts with molten steel with slag, begins to be etched.When high stage dry material is adopted in present big-and-middle-sized coreless induction furnace steel-making, adopt then can reach 130 ~ 150 heats the service life of the utility model coreless induction furnace compound lining at 80 ~ 100 heats service life continuously, the life-span improves more than 50%.When enhancing productivity, reduce the comprehensive consumption cost of refractory material significantly.
In other embodiments, the material of described anti-slag annulus 3 also can be an alumina-carbon material, and the radial thickness of anti-slag annulus also can be 100mm.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (3)
1. coreless induction furnace compound lining, comprise: dry type material liner (1), fire clay (2) and anti-slag annulus (3), described anti-slag annulus (3) is arranged on the slag line endless belt inboard of described dry type material liner (1), cover the slag line endless belt of dry type material liner (1) fully, adopt fire clay (2) to carry out joint filling between anti-slag annulus (3) and the dry type material liner (1).
2. a kind of coreless induction furnace compound lining according to claim 1 is characterized in that described anti-slag annulus (3) outside has identical tapering with dry type material liner (1) slag lining inboard.
3. a kind of coreless induction furnace compound lining according to claim 1, the radial thickness that it is characterized in that described anti-slag annulus (3) is between 20～200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205623400U CN201926294U (en) | 2010-10-15 | 2010-10-15 | Compound inner liner for coreless induction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205623400U CN201926294U (en) | 2010-10-15 | 2010-10-15 | Compound inner liner for coreless induction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201926294U true CN201926294U (en) | 2011-08-10 |
Family
ID=44430140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205623400U Expired - Fee Related CN201926294U (en) | 2010-10-15 | 2010-10-15 | Compound inner liner for coreless induction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201926294U (en) |
-
2010
- 2010-10-15 CN CN2010205623400U patent/CN201926294U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20141015 |
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| EXPY | Termination of patent right or utility model |