CN103691924A - Slag blocking body capable of avoiding casting slag inclusion and manufacturing method thereof - Google Patents
Slag blocking body capable of avoiding casting slag inclusion and manufacturing method thereof Download PDFInfo
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- CN103691924A CN103691924A CN201310726871.7A CN201310726871A CN103691924A CN 103691924 A CN103691924 A CN 103691924A CN 201310726871 A CN201310726871 A CN 201310726871A CN 103691924 A CN103691924 A CN 103691924A
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- slag
- pushing
- steel
- blocking body
- slag pushing
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- 239000002893 slag Substances 0.000 title claims abstract description 126
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005266 casting Methods 0.000 title claims abstract description 21
- 230000000903 blocking effect Effects 0.000 title abstract 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 62
- 239000010959 steel Substances 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 8
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 8
- 239000010962 carbon steel Substances 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims description 13
- 210000002683 foot Anatomy 0.000 claims description 9
- 230000037237 body shape Effects 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 239000011819 refractory material Substances 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 238000009628 steelmaking Methods 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 150000004645 aluminates Chemical class 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- -1 after mixing Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention discloses a slag blocking body capable of avoiding casting slag inclusion and a manufacturing method thereof. The manufacturing method for the slag blocking body comprises a first step of selecting carbon steel or alloy steel with a melting point ten to two hundred DEG C higher than that of molten steel needing smelting to serve as a material for manufacturing the slag blocking body according to steel for smelting the molten steel; a second step of manufacturing the slag blocking body with an inner cavity, designing the shape of the slag blocking body, first designing the external shape of a casing (1) of the slag blocking body, and arranging the cavity (2) in the casing (1), enabling the bottom of the casing to be further provided with more than three support feet (3); performing casting forming, manufacturing the casing (1) and the support feet (3) in a cast mode, and enabling a process hole (11) to be reserved on the casing (1); welding a cover plate (12) to the position of the process hole (11), enabling a material of the cover plate (12) to be the same as a material of the casing (1) of the slag blocking body, and obtaining the slag blocking body capable of avoiding casting slag inclusion. Slag blocking time of the slag blocking body is long, slag blockage in the whole process can be achieved, and the slag blocking body can be recycled; the slag blocking body does not pollute steel castings, does not crack and does not cause steel casting slag inclusion; the molten steel can flow cleanly and is convenient to recycle, and a furnace is convenient to restart.
Description
Technical field
The present invention relates to a kind of slag pushing equipment on utensil and preparation method thereof of smelting for electric furnace, refining ladle etc., it is a kind of slag pushing off body that can not cause foundry goods slag inclusion and preparation method thereof particularly.
Background technology
In steelmaking process, for prevent slag with molten steel (comprise molten iron, lower with, repeat no more) flow out, mainly adopt skimming ball to float on molten steel, can block slag and flow out with molten steel, to guarantee the purity of molten steel.Current skimming ball is mainly at ball peripheral hardware one deck refractory material or directly adopts refractory material to make, refractory material mainly: the compositions such as magnesia, iron ore, sodium silicate binder, alumina cement; Its preparation method is mainly to combine by above composition different proportion or proportion, and then broken, stirring, puts into particular manufacturing craft by mixture, and on forcing press, dry or sintering after extrusion forming, makes required skimming ball.For example Chinese patent CN1219079C discloses a kind of homogeneous skimming ball and production method thereof, and it is comprised of magnesia, iron ore, waterglass bonding agent, alumina cement; Production method is first the iron ore of magnesia refractory material and different specific weight to be carried out to fragmentation, pulverizing, then sieve material is divided into various different grain sizes, magnesia, iron ore, alumina cement raw material are put into mixer, and add water glass binder and mutually mix, after mixing, mixture is put into skimming ball mould, vibration moulding on shake table, after moulding, put into the dry 5h-15h of drying box, natural cooling and demolding, finished product is put into warehouse for finished product and is stored.Again for example, Chinese patent CN100374581C discloses a kind of full homogeneous barium-containing skimming ball for steel making in converter, and it belongs to the pushing off the slag material that pneumatic steelmaking is used; Raw material and the weight percent content of its production are: huge sum of money stone 1-95, abrasive grit or steel grit 0-79, aluminate cement 5-15, the husky 0-5 of magnesium, huge sum of money stone, abrasive grit or steel grit, aluminate cement, magnesium sand are added to water in proportion to be mixed, spheroid is made in the vibration moulding of dress mould, is provided with the annular groove that runs through spheroid largest circumference of square crossing at spherome surface; Its inside and outside homogeneous, whole ball even density, accurate positioning in molten steel.
Although these current skimming balls have certain pushing off the slag effect, it has the following disadvantages:
(1), the exotic material (be also following refractory material) such as the magnesia (magnesium is husky) that adopts, alumina cement, because not reclaiming, cause cost higher, waste resource;
(2), the use of sodium silicate binder has pollution to environment;
(3), refractory material easily stops up electric steel and contracts out the mouth of a river, in the bag in the later stage that causes tapping, steel flow does not go out, and reduces molten steel Utilization rate, causes molten steel waste;
(4), refractory material in molten steel easily cracking peel off, thereby pour into casting mold with molten steel, produce slag inclusion, reduced casting quality; Skimming ball will lose pushing off the slag effect after melting; So this skimming ball is difficult to use in refining ladle cast pushing off the slag;
(5) make this skimming ball, need to make special mould, mould specification is relatively fixing; If formulate different size slag pushing off body, need to change or again make corresponding mould, cause that cost of manufacture is high, the cycle is long;
(6) make this skimming ball and need drop into press apparatus, have high input, cost is high; And need long-time high-temperature roasting or dry, cause fabrication cycle long.
(7) each mix ingredients is difficult for stirring, and causes structural capacity poor, easily ftractures or scatters, and thoroughly loses pushing off the slag effect.
Summary of the invention
The object of the invention is to overcome the above-mentioned deficiency of prior art and a kind of slag pushing off body that can not cause foundry goods slag inclusion is provided; Its pushing off the slag time is long, therefore can realize the pushing off the slag of cast overall process, does not melt slag pushing off body recoverable; Can not pollute cast metal liquid, not ftracture, can not cause steel casting slag inclusion; Molten steel can flow totally, recycles or again open stove conveniently.
Another object of the present invention is overcome the above-mentioned deficiency of prior art and a kind of preparation method that can not cause the slag pushing off body of foundry goods slag inclusion is provided; Its manufacture craft is simple, fast.
Technical scheme of the present invention is: a kind of slag pushing off body that can not cause foundry goods slag inclusion, and it comprises housing; In housing, be provided with cavity; It is to be made by steel.
The further technical scheme of the present invention is: slag pushing off body is for adopting carbon steel or steel alloy to be made.
The present invention further technical scheme is: the fusing point of the steel of making slag pushing off body is higher ten to 200 degrees Celsius than the fusing point that needs melting molten steel.
The present invention further technical scheme is: the size of cavity has 0.4～0.6 times of volume to be exposed on molten steel face to be satisfied with shelves slag body in use.
Another technical scheme of the present invention is: a kind of preparation method that can not cause the slag pushing off body of foundry goods slag inclusion, and it comprises following processing step:
One. selection
Choose carbon steel or steel alloy as the material of making slag pushing off body;
Two. make the slag pushing off body with internal cavity
(1) design slag pushing off body shape
First design the external shape of the housing of slag pushing off body, and be provided with cavity in housing 1 inside;
(2) casting
Method by casting is made housing, on housing 1, leaves fabrication hole;
(3) welded cover plate
The cover plate of burn-oning at fabrication hole place; Make the slag pushing off body that can not cause foundry goods slag inclusion.
The present invention further another technical scheme is: the fusing point of the material that step 1 is chosen is higher than needing the fusing point of melting molten steel.
The present invention further another technical scheme is: step 2 () is also provided with more than three feets in the bottom of housing; In step 2 (two), feet adopts identical material together to cast with housing (1).
The present invention further another technical scheme is: the material of cover plate in step 2 (three) is identical with the material of the housing of slag pushing off body.
The present invention further another technical scheme is: step 1 choose fusing point than the carbon steel of high ten to 200 degrees Celsius of the fusing point that needs melting molten steel or steel alloy the material as making slag pushing off body.
The present invention compared with prior art has following features:
(1) choose the steel that fusing point is slightly high and make slag pushing off body material, be difficult for fusing, elevated temperature strength is good, good toughness does not ftracture, before not melting completely, slag pushing off body there is pushing off the slag effect always, the pushing off the slag time is long, during pushing off the slag according to the thawing speed of the duration of pouring and slag pushing off body, can suitably increase slag pushing off body quantity, guarantee that steel (iron) slag whole process is blocked in ladle, the steel in bag (iron) liquid can all flow out and not affect steel quality, therefore can realize the pushing off the slag of cast overall process, improve again molten steel Utilization rate, do not melted slag pushing off body recoverable.
(2), adopt single metallic steel material, the composition of slag pushing off body partial melting can not change the quality of this foundry goods after entering molten steel, can not pollute molten steel, because all belong to Steel material, guaranteed the purity of molten steel, more can not do and after skimming ball fusing cracking peels off, with molten steel, enter casting mold and cause slag inclusion as traditional refractory material.
(3), adopt the method for casting to make, production process and method are simple, foundry enterprise can self manufacture, oneself use is very convenient, with low cost.
(4), design internal cavity, can reduce the averag density of slag pushing off body, be convenient to can float on molten steel in use, realize slag stopping function.
(5), feet can allow molten steel when soon having flowed, and between slag pushing off body and molten steel outlet, forms clearance channel, to facilitate steel flow to obtain totally, after black furnace, easily clears up slag pushing off body on the other hand.
In order to be illustrated more clearly in the present invention, enumerate following examples, but it is without any restrictions to scope of invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of spherical slag pushing off body of the present invention;
Fig. 2 is the structural representation of the slag pushing off body of the present invention of segment-shaped;
Fig. 3 is the structural representation of columniform slag pushing off body of the present invention;
Fig. 4 is the structural representation of the slag pushing off body of the present invention of truncated cone-shaped.
The specific embodiment
Can not cause a slag pushing off body for foundry goods slag inclusion, it makes by following processing step:
One. choose steel
Make as required the steel (being the molten steel material for casting of melting in electric furnace or refining ladle) of steel casting, select fusing point than the steel of the fusing point slightly high (exceeding ten to 200 degrees Celsius) of the steel that need to make steel casting as the material of making slag pushing off body; The main material of making slag pushing off body can adopt carbon steel, steel alloy, and for example, during the following several steel of melting, the steel of selectable slag pushing off body are as follows:
Common slag pushing off body material and the corresponding casting smelting molten metal material table of comparisons
Two. make the slag pushing off body with internal cavity
(1) design slag pushing off body shape
First design the external shape of the housing 1 of slag pushing off body, housing 1 can be the shapes such as spherical (as shown in Figure 1), segment-shaped (as shown in Figure 2), cylindrical (as shown in Figure 3), truncated cone-shaped (as shown in Figure 4), the inside of housing 1 is provided with cavity 2, to reduce the averag density of slag pushing off body, being convenient to shelves slag body in use has 0.4～0.6 times of volume to be exposed on molten steel face, the geometric center 21 of cavity 2 does not overlap with the center of gravity 11 of slag pushing off body, and the geometric center 21 of cavity 2 is positioned at the top (so that orientation of used time) of the center of gravity 11 of slag pushing off body, with the center of gravity that guarantees slag pushing off body below the geometric center of the profile of slag pushing off body, can guarantee like this pushing off the slag physical efficiency with feet attitude stabilization vertically downward be suspended in molten steel, certainly cavity 2 also can design mix every several cavitys, this is only that simple equivalent technologies is replaced, the size of cavity 2 floats on molten steel face to be suitable for whole pushing off the slag physical efficiency, and in the rational degree of depth, feet 3 in the bottom design of housing 1 more than three,
(2) casting
By the method for casting make housing 1 and on feet 3, on housing 1, leave fabrication hole 11, to facilitate taking-up molding sand;
(3) welded cover plate
The cover plate 12 of burn-oning at fabrication hole 11 places; The material of cover plate 12 is identical with housing 1 and feet 3.
The present invention is not limited to above-mentioned concrete structure, so long as select fusing point than the slightly high steel of the fusing point of the steel that need to make foundry goods as the material of making slag pushing off body, and within slag pushing off body of making and preparation method thereof just drops on the protection domain of invention.
Claims (10)
1. can not cause a slag pushing off body for foundry goods slag inclusion, it is characterized in that: it comprises housing (1); In housing (1), be provided with cavity (2); It is to be made by steel.
2. the slag pushing off body that can not cause foundry goods slag inclusion according to claim 1, is characterized in that: slag pushing off body is for adopting carbon steel or steel alloy to be made.
3. the slag pushing off body that can not cause foundry goods slag inclusion according to claim 1, is characterized in that: the fusing point of the steel of making slag pushing off body is higher ten to 200 degrees Celsius than the fusing point that needs melting molten steel.
4. according to not causing the slag pushing off body of foundry goods slag inclusion described in claim 1 or 2 or 3, it is characterized in that: the size of cavity (2) has 0.4～0.6 times of volume to be exposed on molten steel face to be satisfied with a shelves slag body in use.
5. can not cause a preparation method for the slag pushing off body of foundry goods slag inclusion, it is characterized in that: it comprises following processing step:
One. selection
Choose carbon steel or steel alloy as the material of making slag pushing off body;
Two. make the slag pushing off body with internal cavity
(1) design slag pushing off body shape
First design the external shape of the housing (1) of slag pushing off body, and be provided with cavity (2) in housing 1 inside;
(2) casting
Method by casting is made housing (1), leaves fabrication hole (11) on housing (1);
(3) welded cover plate
At fabrication hole (11) cover plate (12) of locating to burn-on; Make the slag pushing off body that can not cause foundry goods slag inclusion.
6. the preparation method that can not cause the slag pushing off body of foundry goods slag inclusion according to claim 5, is characterized in that: the fusing point of the material that step 1 is chosen is higher than needing the fusing point of melting molten steel.
7. according to not causing the preparation method of the slag pushing off body of foundry goods slag inclusion described in claim 5 or 6, it is characterized in that: step 2 () is also provided with more than three feets (3) in the bottom of housing (1); In step 2 (two), feet (3) adopts identical material together to cast with housing (1).
8. according to not causing the preparation method of the slag pushing off body of foundry goods slag inclusion described in claim 5 or 6, it is characterized in that: the material of the cover plate (12) in step 2 (three) is identical with the material of the housing (1) of slag pushing off body.
9. the preparation method that can not cause the slag pushing off body of foundry goods slag inclusion according to claim 7, is characterized in that: the material of the cover plate (12) in step 2 (three) is identical with the material of the housing (1) of slag pushing off body.
10. according to not causing the preparation method of the slag pushing off body of foundry goods slag inclusion described in claim 5 or 6, it is characterized in that: step 1 choose fusing point than the carbon steel of high ten to 200 degrees Celsius of the fusing point that needs melting molten steel or steel alloy as the material of making slag pushing off body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310726871.7A CN103691924A (en) | 2013-12-17 | 2013-12-17 | Slag blocking body capable of avoiding casting slag inclusion and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310726871.7A CN103691924A (en) | 2013-12-17 | 2013-12-17 | Slag blocking body capable of avoiding casting slag inclusion and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103691924A true CN103691924A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310726871.7A Pending CN103691924A (en) | 2013-12-17 | 2013-12-17 | Slag blocking body capable of avoiding casting slag inclusion and manufacturing method thereof |
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| CN (1) | CN103691924A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011368A (en) * | 2016-07-27 | 2016-10-12 | 山东钢铁股份有限公司 | Slag blocking ball for converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0128576A1 (en) * | 1983-06-13 | 1984-12-19 | Thyssen Stahl Aktiengesellschaft | Closure element for retaining slag during tapping from a converter |
| JPS63144007A (en) * | 1986-12-06 | 1988-06-16 | 新日本製鐵株式会社 | Manufacture of slag outflow limiting sphere |
| KR20020011272A (en) * | 2000-08-01 | 2002-02-08 | 이구택 | A plug for clogging tapping hole of furnace |
| CN2532083Y (en) * | 2002-03-14 | 2003-01-22 | 曹松年 | Bull taper shaped slag stopper for tapping of rotary furnace |
| CN201292374Y (en) * | 2008-10-31 | 2009-08-19 | 周拥军 | Slag bridge for tapping of revolving furnace |
| CN201857404U (en) * | 2010-10-14 | 2011-06-08 | 马鞍山钢铁股份有限公司 | Thin-shell slag stopping cap |
| CN202688360U (en) * | 2012-04-26 | 2013-01-23 | 李宏亮 | Converter steel tapping slag stopping device |
-
2013
- 2013-12-17 CN CN201310726871.7A patent/CN103691924A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0128576A1 (en) * | 1983-06-13 | 1984-12-19 | Thyssen Stahl Aktiengesellschaft | Closure element for retaining slag during tapping from a converter |
| JPS63144007A (en) * | 1986-12-06 | 1988-06-16 | 新日本製鐵株式会社 | Manufacture of slag outflow limiting sphere |
| KR20020011272A (en) * | 2000-08-01 | 2002-02-08 | 이구택 | A plug for clogging tapping hole of furnace |
| CN2532083Y (en) * | 2002-03-14 | 2003-01-22 | 曹松年 | Bull taper shaped slag stopper for tapping of rotary furnace |
| CN201292374Y (en) * | 2008-10-31 | 2009-08-19 | 周拥军 | Slag bridge for tapping of revolving furnace |
| CN201857404U (en) * | 2010-10-14 | 2011-06-08 | 马鞍山钢铁股份有限公司 | Thin-shell slag stopping cap |
| CN202688360U (en) * | 2012-04-26 | 2013-01-23 | 李宏亮 | Converter steel tapping slag stopping device |
Non-Patent Citations (1)
| Title |
|---|
| 张晋宏等: ""金属型铸造挡渣球"", 《山西冶金》, no. 1, 28 February 1998 (1998-02-28), pages 3 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011368A (en) * | 2016-07-27 | 2016-10-12 | 山东钢铁股份有限公司 | Slag blocking ball for converter |
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Application publication date: 20140402 |