CN110586923A - Casting system and casting method of metallurgical blanking port - Google Patents
Casting system and casting method of metallurgical blanking port Download PDFInfo
- Publication number
- CN110586923A CN110586923A CN201910869917.8A CN201910869917A CN110586923A CN 110586923 A CN110586923 A CN 110586923A CN 201910869917 A CN201910869917 A CN 201910869917A CN 110586923 A CN110586923 A CN 110586923A
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- China
- Prior art keywords
- casting
- sand box
- special sand
- feed opening
- cavity
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/02—Sectional flasks, i.e. with divided, articulated, or interchangeable side sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
- B22D47/02—Casting plants for both moulding and casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention belongs to the technical field of metallurgy feed opening casting, and discloses a casting system and a casting method of a metallurgical feed opening, wherein the casting system comprises a special sand box and a pouring system matched with the special sand box, a riser is arranged on the special sand box, a casting product cavity is arranged in the special sand box, a bent pipe is pre-embedded in the cavity, the bent pipe is completely limited in the special sand box, and a refractory chilling mixture is filled in the bent pipe to form a cooling support for the bent pipe; the refractory chilling mixture is mainly formed by mixing chrome ore sand and graphite; according to the invention, the elbow is filled based on the mixture of the chromium ore sand and the graphite, so that the elbow can meet the casting requirement without an external water cooling system, and the integral casting system is effectively simplified; the chromium ore is a common chilling material, so that the low temperature inside the bent pipe can be effectively ensured, and the phenomenon that the bent pipe is melted through in the pouring process is avoided.
Description
Technical Field
The invention belongs to the technical field of metallurgy feed opening casting, and particularly relates to a casting system and a casting method of a metallurgical feed opening.
Background
The feed opening for the metallurgical blast furnace equipment is an important component of the blast furnace smelting integral system and is used for adding alloy materials in the blast furnace steelmaking process. In practical application, the blanking application working condition is complex, and the product is in a high-temperature and high-pressure gas continuous scouring and frequent heat exchange state for a long time; therefore, in the product casting process, very high requirements are placed on the product quality of the feed opening; in addition, a plurality of cooling water channels are arranged in the product, so that the temperature of the product can be kept in a low-temperature state in the using process, the structure of the product is complex, and the casting difficulty of the product is high.
The conventional casting process for the feed opening is shown in fig. 1: adopting a horizontal parting mode and matching with special sand boxes (1a, 1b), manufacturing water through holes on the sand boxes, pre-embedding bent pipes (2) in the sand box cavities, and extending the bent pipes (2) out of the sand boxes through the water through holes; in addition, an external cooling circulation system is arranged outside the sand box and is connected with the extended elbow (2); specifically, cooling water continuously enters the bent pipe from the external cooling circulation system in the pouring process so as to ensure that the bent pipe is not melted in the pouring process.
However, the casting method has certain defects: for example, 1, a whole set of special water-cooling tool needs to be manufactured, the tool is complex in shape and difficult to manufacture, so that the production efficiency of a product is low, and the production cost of the product is increased; 2. the requirement on the water cooling process in the pouring process is very strict, and the spray explosion phenomenon is easy to occur due to water leakage of the bent pipe, so that the product is scrapped and even safety accidents occur; 3. the circulating water cooling process easily causes a contact gap between a molded product and the bent pipe, so that the cooling effect of the product in the using process is poor, and the service life of the product is influenced to a certain extent.
Disclosure of Invention
In view of this, the present invention provides a casting system and a casting method for a metallurgical material outlet, so as to solve the defects of complex shape, low production efficiency, high production cost, easy occurrence of spray explosion, etc. existing in the existing casting process for the material outlet.
1. The utility model provides a metallurgical casting system with feed opening, includes special sand box to and the gating system of adaptation with it, and is equipped with the rising head on the special sand box, be equipped with casting product die cavity in the special sand box, and pre-buried the return bend in the die cavity, the return bend is injectd completely inside the special sand box, and the inside packing of return bend has fire-resistant chilling mixture to form the cooling support to the return bend.
Preferably, the refractory chilled mixture is mainly formed by mixing chrome ore sand and graphite, and the weight mixing ratio of the chrome ore sand to the graphite is 1: 1.
Preferably, the special sand box adopts horizontal parting, the riser sets up in the top of horizontal parting, gating system's ingate sets up on horizontal parting surface, the return bend is equipped with two altogether, is located the both sides of horizontal parting surface respectively.
Based on horizontal parting, the special sand box comprises an upper box and a lower box, so that a casting product cavity in the special sand box forms an upper cavity and a lower cavity, and the two bent pipes are respectively pre-buried in the upper cavity and the lower cavity.
2. The casting method of the feeding hole for metallurgy based on the system comprises the following steps:
s1, preparing a refractory chilling mixture: uniformly mixing the chromium ore sand and the graphite according to the weight ratio of 1: 1;
s2, selecting two bent pipes according to the size of a feed opening to be cast, and tightly filling a refractory chilling mixture into the two bent pipes;
s3, determining an upper mold and a lower mold of the feed opening to be cast according to horizontal parting;
s4, constructing a cavity model of the special sand box according to the upper mold and the lower mold;
s5, fixing the two bent pipes obtained in the step S2 to an upper cavity and a lower cavity of the special sand box respectively, and ensuring that the two bent pipes are completely embedded into the special sand box;
s6, determining a pouring position: arranging an inner pouring gate on the horizontal parting surface of the special sand box;
s7, determining a pouring system, laying the pouring system and connecting the pouring system with an inner pouring gate, and ensuring that molten steel respectively enters cavities on two sides along a horizontal parting surface;
s8, solidifying and forming molten steel, and removing the special sand box and the refractory chilling mixture to obtain the casting with the bent pipe and the feed opening.
The invention has the technical effects that:
1) according to the invention, the elbow is filled based on the mixture of the chrome ore sand and the graphite, so that the elbow can meet the casting requirement without an external water cooling system, thereby effectively simplifying the whole casting system, improving the casting efficiency of the product and reducing the production cost.
2) The chromium ore is a common chilling material, so that the low temperature inside the bent pipe can be effectively ensured, the phenomenon that the bent pipe is melted through in the pouring process is avoided, and the molten steel spray explosion accident is effectively prevented; and the pouring temperature and the pouring time of the molten steel can not be changed, so that the casting system can be operated according to normal products, and the process is simple.
3) In the invention, the completeness of the inner wall of the elbow is ensured based on the filling of the mixture, and the outer wall of the elbow is melted at the high temperature of the molten steel and forms limited fusion with the finally formed product, so that the problem of a gap between the elbow and the formed product is effectively solved, the water cooling effect of the product in the using process is improved, and the service life of the product is further prolonged.
Drawings
FIG. 1 is a schematic diagram of a prior art feed casting system;
FIG. 2 is a schematic illustration of a cast product made using a prior art casting system;
FIG. 3 is a schematic view of a casting system according to the present invention;
FIG. 4 is a schematic illustration of a cast product made using the casting system of the present invention.
In the figure: 1-special sand box, 1 a-upper box, 1 b-lower box, 2-elbow and 3-riser.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
1. Referring to fig. 1, a schematic structural diagram of a conventional feed opening casting system is shown, which includes a special sand box 1, where the special sand box 1 is composed of an upper box 1a and a lower box 1b, and a horizontal parting surface is formed between the upper box 1a and the lower box 1b, where a riser 3 is provided at a part of the upper box 1a, and a bent pipe 2 is embedded in cavities of the upper box 1a and the lower box 1 b; in addition, a water through hole is formed in the special sand box 1, and the bent pipe 2 penetrates through the water through hole and extends out of the special sand box 1;
the cooling device also comprises an external cooling circulation system, and the external cooling circulation system is connected with the elbow pipe 2 through a control valve, so that the cold water circulation in the elbow pipe 2 in the casting process of the casting product is realized.
Referring to fig. 2, a schematic structural diagram of a casting product manufactured by using a conventional casting system is shown, in which an elbow 2 is pre-embedded inside a feed opening product c, but a certain contact gap d exists between the elbow 2 and the feed opening product c.
2. As shown in fig. 3, compared with the existing casting system, the casting system for the metallurgical blanking port provided by the invention also comprises a special sand box 1 consisting of an upper box 1a and a lower box 1b, and a riser 3 arranged on the upper box 1a, wherein the bent pipe 2 is also embedded in the cavities of the upper box 1a and the lower box 1b, but the special sand box 1 is not required to be provided with a water through hole, so that the bent pipe 2 is completely embedded in the special sand box 1, and an external cooling circulation system is not required to be arranged;
in addition, the interior of the bent tube 2 is filled with a refractory quench mixture e to form a cooling support for the bent tube 2; the refractory chilling mixture e is mainly formed by mixing chrome ore sand and graphite in a weight mixing ratio of 1: 1, the chrome ore sand is a common refractory material and chilling material, and an effective cooling effect can be formed on the inner wall of the bent pipe 2, so that the casting requirement of a feed opening can be effectively met under the condition that an external cooling circulation system is not connected, and the phenomenon of fusion penetration of the bent pipe 2 can be effectively avoided;
still include gating system i, and gating system i's ingate sets up in the horizontal die joint department of upper box 1a and lower box 1b to this molten steel directly dashes return bend 2 and leads to return bend 2 to warp when avoiding the pouring.
Referring to fig. 4, in the embodiment, when the feeding hole is cast, molten steel enters the cavity from the pouring system i, fills the cavity and wraps the bent pipe 2, in the process, the outer wall of the bent pipe 2 is melted by the high temperature of the molten steel, so that the fusion layer 2a in fig. 4 is formed, the refractory chilling mixture e inside the fusion layer maintains the low temperature property of the inner wall of the bent pipe 2, and the hard inner wall layer 2b is remained, so that the limited fusion between the bent pipe 2 and the feeding hole product c is formed, and the contact gap d formed in the conventional casting is effectively eliminated.
3. Aiming at the system provided by the invention, the invention also provides a casting method of the feeding hole for metallurgy, which comprises the following steps:
s1, preparing a refractory chilling mixture e: uniformly mixing the chromium ore sand and the graphite according to the weight ratio of 1: 1;
s2, selecting two bent pipes 2 according to the size of a feed opening to be cast, and tightly filling a refractory chilling mixture e into the two bent pipes 2;
s3, determining an upper mold and a lower mold of the feed opening to be cast according to horizontal parting;
s4, constructing a cavity model of the special sand box 1 according to the upper model and the lower model;
s5, fixing the two bent pipes 2 obtained in the step S2 to an upper cavity and a lower cavity of the special sand box 1 respectively, and ensuring that the two bent pipes 2 are completely embedded into the special sand box 1;
s6, determining a pouring position: an inner pouring gate is arranged on the horizontal parting surface of the special sand box 1;
s7, determining a pouring system i, laying the pouring system i and connecting the pouring system i with an inner pouring gate, and ensuring that molten steel enters cavities on two sides along a horizontal parting surface;
s8, solidifying and forming molten steel, and removing the special sand box 1 and the refractory chilling mixture e to obtain a feed opening casting c with the bent pipe 2.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a metallurgical casting system with feed opening, includes special sand box (1) to and the gating system of adaptation with it, and be equipped with rising head (3) on special sand box (1), be equipped with foundry goods product die cavity in special sand box (1), and pre-buried return bend (2), its characterized in that in the die cavity: the elbow (2) is completely limited inside the special sand box (1), and the inside of the elbow (2) is filled with a refractory chilling mixture to form a cooling support for the elbow (2).
2. The casting system of a metallurgical feed opening of claim 1, wherein: the refractory chilling mixture is mainly formed by mixing chrome ore sand and graphite.
3. The casting system of a metallurgical feed opening of claim 2, wherein: the weight mixing ratio of the chromium ore sand to the graphite is 1: 1.
4. The casting system of a metallurgical feed opening of claim 1, wherein: the special sand box (1) is horizontally split, the risers (3) are arranged above the horizontally split, an inner pouring gate of the pouring system is arranged on a horizontal parting surface, and the bent pipes (2) are provided with two parts and located on two sides of the horizontal parting surface respectively.
5. The casting system of a metallurgical feed opening according to claim 4, wherein: the special sand box (1) comprises an upper box (1a) and a lower box (1b), so that a casting product cavity in the special sand box (1) forms an upper cavity and a lower cavity, and the two bent pipes (2) are pre-buried in the upper cavity and the lower cavity respectively.
6. A casting method of a feeding hole for metallurgy is characterized by comprising the following steps:
s1, preparing a refractory chilling mixture: uniformly mixing the chromium ore sand and the graphite according to the weight ratio of 1: 1;
s2, selecting two bent pipes (2) according to the size of a feed opening to be cast, and tightly filling a refractory chilling mixture into the two bent pipes (2);
s3, determining an upper mold and a lower mold of the feed opening to be cast according to horizontal parting;
s4, constructing a cavity model of the special sand box (1) according to the upper mould and the lower mould;
s5, fixing the two bent pipes (2) obtained in the step S2 to an upper cavity and a lower cavity of the special sand box (1) respectively, and ensuring that the two bent pipes (2) are completely embedded into the special sand box (1);
s6, determining a pouring position: an inner sprue is arranged on the horizontal parting surface of the special sand box (1);
s7, determining a pouring system, laying the pouring system and connecting the pouring system with an inner pouring gate, and ensuring that molten steel respectively enters cavities on two sides along a horizontal parting surface;
s8, solidifying and forming molten steel, and removing the special sand box (1) and the refractory chilling mixture to obtain a casting with a feed opening of the bent pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869917.8A CN110586923A (en) | 2019-09-16 | 2019-09-16 | Casting system and casting method of metallurgical blanking port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869917.8A CN110586923A (en) | 2019-09-16 | 2019-09-16 | Casting system and casting method of metallurgical blanking port |
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| CN110586923A true CN110586923A (en) | 2019-12-20 |
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| CN201910869917.8A Pending CN110586923A (en) | 2019-09-16 | 2019-09-16 | Casting system and casting method of metallurgical blanking port |
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Citations (10)
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|---|---|---|---|---|
| JP2003112250A (en) * | 2001-10-04 | 2003-04-15 | Nkk Corp | Cast iron product inserting cooling pipe and its production method |
| CN1513622A (en) * | 2003-05-12 | 2004-07-21 | 马鞍山钢铁股份有限公司 | Casting method of metal substrate cooling wall |
| CN1544185A (en) * | 2003-11-12 | 2004-11-10 | 阮新伟 | Manufacturing method of buried pipe type copper cooling part |
| CN101020225A (en) * | 2006-12-20 | 2007-08-22 | 天水星火机床有限责任公司 | Tube imbedding casting process to form bent cast hole |
| CN101634520A (en) * | 2009-05-31 | 2010-01-27 | 江苏联兴成套设备制造有限公司 | Casting method of cast steel cooling plate |
| CN103611921A (en) * | 2013-12-05 | 2014-03-05 | 江苏联兴成套设备制造有限公司 | Slag skimmer production method |
| CN104293994A (en) * | 2014-10-29 | 2015-01-21 | 马鞍山市润通冶金材料有限公司 | Cast steel cooling wall for blast furnace and manufacturing method for cast steel cooling wall |
| CN104531927A (en) * | 2014-12-11 | 2015-04-22 | 马鞍山华盛冶金科技发展有限公司 | Solid filler for casting cast steel cooling wall |
| DE102015001190A1 (en) * | 2015-01-31 | 2016-08-04 | Karlfried Pfeifenbring | Cooling element for metallurgical furnaces and method for producing a cooling element |
| CN206839066U (en) * | 2017-04-27 | 2018-01-05 | 禹州市红利铸造材料有限公司 | One kind casting sandbox |
-
2019
- 2019-09-16 CN CN201910869917.8A patent/CN110586923A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112250A (en) * | 2001-10-04 | 2003-04-15 | Nkk Corp | Cast iron product inserting cooling pipe and its production method |
| CN1513622A (en) * | 2003-05-12 | 2004-07-21 | 马鞍山钢铁股份有限公司 | Casting method of metal substrate cooling wall |
| CN1544185A (en) * | 2003-11-12 | 2004-11-10 | 阮新伟 | Manufacturing method of buried pipe type copper cooling part |
| CN101020225A (en) * | 2006-12-20 | 2007-08-22 | 天水星火机床有限责任公司 | Tube imbedding casting process to form bent cast hole |
| CN101634520A (en) * | 2009-05-31 | 2010-01-27 | 江苏联兴成套设备制造有限公司 | Casting method of cast steel cooling plate |
| CN103611921A (en) * | 2013-12-05 | 2014-03-05 | 江苏联兴成套设备制造有限公司 | Slag skimmer production method |
| CN104293994A (en) * | 2014-10-29 | 2015-01-21 | 马鞍山市润通冶金材料有限公司 | Cast steel cooling wall for blast furnace and manufacturing method for cast steel cooling wall |
| CN104531927A (en) * | 2014-12-11 | 2015-04-22 | 马鞍山华盛冶金科技发展有限公司 | Solid filler for casting cast steel cooling wall |
| DE102015001190A1 (en) * | 2015-01-31 | 2016-08-04 | Karlfried Pfeifenbring | Cooling element for metallurgical furnaces and method for producing a cooling element |
| CN206839066U (en) * | 2017-04-27 | 2018-01-05 | 禹州市红利铸造材料有限公司 | One kind casting sandbox |
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Application publication date: 20191220 |
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