CN112359157B - Novel prefabricated iron runner and preparation method thereof - Google Patents
Novel prefabricated iron runner and preparation method thereof Download PDFInfo
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- CN112359157B CN112359157B CN202011332839.7A CN202011332839A CN112359157B CN 112359157 B CN112359157 B CN 112359157B CN 202011332839 A CN202011332839 A CN 202011332839A CN 112359157 B CN112359157 B CN 112359157B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a novel prefabricated iron runner which comprises an outer steel shell, a permanent layer and a working layer, wherein the permanent layer and the working layer are arranged in the outer steel shell, the permanent layer comprises a permanent pouring layer, a prefabricated base and prefabricated side plates, the working layer is arranged in a space formed by enclosing the permanent pouring layer, the prefabricated base and the prefabricated side plates, the prefabricated side plates and the prefabricated base are fixedly inserted, arc-shaped protrusions are arranged at the lower ends of the prefabricated side plates, and arc-shaped grooves matched with the arc-shaped protrusions are formed in the prefabricated base. The invention also discloses a preparation method of the novel prefabricated tapping channel, the process of the invention is simple, the prepared novel prefabricated tapping channel effectively blocks the melt passing through the working layer, the safety risk is greatly reduced, the replacement is convenient and fast, the time consumption is short, and the normal switching use of the tapping channel is not influenced in the daily maintenance process.
Description
Technical Field
The invention belongs to the technical field of iron making, and particularly relates to a novel prefabricated tapping channel and a preparation method thereof.
Background
At present, the large domestic blast furnaces all adopt an iron storage type main tapping runner (hereinafter referred to as a main runner), and in the tapping process of the blast furnaces, the main runner is not only a channel for discharging iron slag in time, but also plays a role in storing molten iron and molten slag when the blast furnaces do not tap iron. In actual production, the main groove is mainly damaged by the following reasons: (1) the violent scouring and erosion of flowing high-temperature molten iron and molten slag; (2) chemical erosion of liquid slag iron of the blast furnace; (3) thermal shock damage of intermittent tapping. Among them, the erosion of molten iron and slag is the most important factor for the damage of main trench. In actual production, the main groove wall gradually melts and becomes thinner along with the increase of iron passing amount and service time, and when the thinnest part of the main groove wall is smaller than a specified value, the main groove wall is in danger of being burnt through by molten iron, and huge economic loss is caused. However, the traditional main ditch permanent layer adopts a refractory brick masonry structure, the position condition of the main ditch below the slag surface cannot be checked and fed back in the daily use process, and great potential safety hazards exist.
In recent years, the main trench permanent course has a technical trend of being constructed by refractory bricks to a permanent course. The prefabricated member with the temperature measuring function (the melting loss condition of the prefabricated member temperature reaction main channel is measured by a thermocouple) has been developed abroad, and the prefabricated member is industrially applied to a few blast furnaces at home, but the prefabricated member also has the problems of difficult replacement after being damaged, high use cost, long manufacturing and transportation period and the like, so that the industrial application of the prefabricated member is limited.
In order to solve the problems, the invention discloses a prefabricated iron tapping channel (CN210048794U), which comprises a steel shell with a U-shaped section, a permanent layer arranged in the steel shell and a working layer arranged on the permanent layer, wherein the permanent layer comprises a prefabricated base arranged on the inner edge of the steel shell, a prefabricated side plate is inserted at the upper end of the prefabricated base through an installation groove, the prefabricated side plate comprises a plurality of prefabricated single plates which are assembled together along a straight line, the two adjacent prefabricated single plates are occluded with each other, a temperature measuring plate installation groove is formed in the outer side surface of each prefabricated single plate, a temperature measuring plate is arranged in the temperature measuring plate, a temperature sensor is arranged on each temperature measuring plate, and a cable of the temperature measuring plate penetrates through the steel shell to be connected to a controller. The method optimizes the structure of the iron runner to a certain extent and solves the problems of temperature detection, feedback and the like. But still does not completely solve the above problems:
(1) after the bottom of the prefabricated side plate is embedded into the mounting groove, the mounting groove is inverted trapezoidal in structure, and the upper end of the prefabricated side plate and the steel shell are small in pore size, so that the prefabricated side plate is difficult to replace;
(2) because the top of the prefabricated single plate is designed to be of a Z-shaped structure, a certain part of the prefabricated side plate cannot be independently replaced in the process of disassembly or replacement, all the prefabricated single plates need to be disassembled and then replaced, and the construction difficulty and time are increased;
(3) and a fireproof pouring layer and a high-alumina refractory brick layer are additionally arranged at the bottom of the prefabricated member and the steel shell, so that the cost is increased.
Disclosure of Invention
The technical problems solved by the invention are as follows: the novel iron runner prepared by the method can effectively block the melt passing through the working layer, monitor the temperature of the iron runner in real time, greatly reduce the safety risk, is convenient to replace and short in time, and can be normally switched and used without influencing the iron runner in the daily maintenance process.
The technical scheme is as follows: in order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a novel prefabricated tapping channel, includes outer box hat, sets up permanent layer and the working layer in outer box hat, permanent layer is including permanent pouring layer, prefabricated base and prefabricated curb plate, the working layer sets up in permanent pouring layer, prefabricated base and the prefabricated curb plate encloses the space that closes and form, prefabricated curb plate is pegged graft fixedly with prefabricated base, prefabricated curb plate lower extreme is provided with convex arch, be provided with on the prefabricated base with convex protruding assorted arc recess of arc.
Preferably, the prefabricated base is formed by assembling a plurality of base blocks along the linear direction, two adjacent base blocks are connected in an occluded manner, the prefabricated side plate is formed by assembling a plurality of T-shaped side wall single plates along the linear direction, and two adjacent single plates are connected in an occluded manner.
Preferably, the base blocks comprise L-shaped transverse supports and first bosses arranged on the transverse supports, one ends of the first bosses protrude out of the transverse supports to form protruding sections, first gaps are formed between the other ends of the first bosses and the transverse supports, and two adjacent base blocks are connected in an occlusion mode through the protruding sections and the first gaps.
Preferably, the first boss and the transverse support are integrally formed, and an integral arc-shaped groove is formed at the upper part of the first boss and the upper part of the transverse support.
Preferably, the side wall veneer comprises a plate body, one side surface of the plate body is provided with a second boss, the other corresponding side surface of the plate body is provided with a second notch, and an arc-shaped bulge is arranged below the plate body.
Preferably, the adjacent side wall single plates are respectively a positive T-shaped side wall single plate and an inverted T-shaped side wall single plate, and the positions of the second bosses of the T-shaped side wall single plate and the inverted T-shaped side wall single plate are opposite, so that the T-shaped side wall single plate and the inverted T-shaped side wall single plate are mutually meshed and connected.
Preferably, the inner wall of the outer steel shell is provided with a heat insulation layer, the outer side wall of the prefabricated side plate is provided with a temperature measurement plate, the temperature measurement plate is provided with a temperature sensor, and the temperature sensor is connected with a PLC (programmable logic controller).
The invention also discloses a preparation method of the novel prefabricated tapping channel, the prefabricated base and the prefabricated side plate are subjected to preheating treatment after being poured, the temperature is gradually increased in an environment protected by carbon, and then the prefabricated tapping channel is subjected to heat preservation and cooling to the normal temperature.
Preferably, the temperature is raised to 110 ℃ at the temperature raising rate of 10 ℃/min, and then the temperature is controlled for 24 hours; heating to 330 ℃ at a heating rate of 15 ℃/min, and then controlling the temperature for 24 hours; heating to 550 ℃ at the heating rate of 15 ℃/min, then controlling the temperature for 24h, heating to 1000 ℃ at the heating rate of 20 ℃/min, then controlling the temperature for 24h, and finally carrying out heat preservation and cooling to the normal temperature at the average speed of 15 ℃/min.
Preferably, the prefabricated side plate is made of high-strength alumina-silicon carbide materials, and the prefabricated base is made of low-expansion-rate mullite castable.
Has the advantages that: compared with the prior art, the invention has the following advantages:
the permanent layer between the working layer of the blast furnace main channel and the outer steel shell adopts a composite structure, and melts penetrating through the working layer are effectively blocked through unique structure and material design, so that the safety risk is greatly reduced; through the analog calculation of the main ditch temperature field, the key parameters such as the installation position, the structure and the material of the prefabricated member temperature measurement system are optimized, the real-time monitoring of the permanent layer temperature in a blast furnace central control system is realized, the safety condition of the main ditch is intuitively mastered, the early warning can be timely carried out under the abnormal condition, and the safety use performance of the main ditch is greatly improved.
(1) And (3) optimizing the structure of the prefabricated part: during the use of the iron runner, the working layer is cracked due to long-term erosion and scouring, so that the working layer needs to be replaced, but the prefabricated part below the working layer is easily damaged due to unexpected stress or mechanical action during the replacement process. In order to facilitate timely replacement of the accidentally damaged prefabricated part, the prefabricated side wall single plate adopts a T-shaped design, so that the prefabricated part is prevented from being blocked by the adjacent side wall single plate in the separation process; furthermore, the T-shaped prefabricated side wall single plate and the prefabricated base are in contact design through the arc-shaped groove, flexible butt joint of the T-shaped prefabricated side wall single plate and the prefabricated base is achieved, when the T-shaped prefabricated side wall single plate is replaced, due to the arc-shaped groove design, the T-shaped prefabricated side wall single plate can rotate, the T-shaped prefabricated side wall single plate cannot be scratched with the heat insulation plate and the base after rotating at a certain angle, and accordingly damage-free separation from the base is really achieved. And the prefab replacement process is convenient, the time spent is short, can accomplish in the iron runner daily overhaul in-process, does not influence the normal switching use of ditch system.
In addition, the bottom of the working layer of the traditional tapping channel is easy to peel and crack after being eroded by molten iron for a long time through scouring, and the thickness of the refractory material at the bottom of the working layer is increased by optimizing the angle of the prefabricated member and the structure of the working layer, so that the service time of the working layer is obviously prolonged.
(2) Optimizing the material of the refractory material: the prefabricated side plate prefabricated part is made of high-strength aluminum-silicon carbide materials. The silicon carbide has stable chemical property, high heat conductivity coefficient, small thermal expansion coefficient, high temperature resistance, high hardness and good wear resistance, thereby being suitable for manufacturing refractory materials with excellent shock resistance and high strength. Meanwhile, the introduced material of the silicon carbide has strong oxidation resistance and slag resistance. In addition, the prefabricated base is made of mullite casting materials of a system with low creep deformation and low thermal expansion rate and is reinforced by steel fibers. Mullite is a high-quality refractory material and has the characteristics of uniform expansion, excellent thermal shock stability, high refractoriness under load, small high-temperature creep value, high hardness, impact resistance and the like.
(3) Optimizing the material of the temperature measuring plate: the temperature measuring plate adopts the Cu-Ag alloy, and the heat conducting property, the anti-corrosion property, the mechanical strength and the electric conductivity of the temperature measuring plate are obviously improved compared with those of the traditional temperature measuring plate material Cu and other alloys. Therefore, the temperature measuring plate can express the actual temperature of the blast furnace tapping channel more quickly and accurately in the actual working condition environment, and meanwhile, the service life and the service performance of the temperature measuring plate under the severe working condition are obviously improved.
(4) Optimization of the temperature measurement plate structure: the traditional temperature measuring plate adopts an embedded design, the method not only causes unstable contact between the temperature measuring plate and the prefabricated part to influence the temperature measuring accuracy in the long-term use process, but also needs to reserve an embedded clamping groove in the prefabricated part preparation process to cause extremely complex preparation method. According to the invention, the temperature measuring plate and the prefabricated member are integrally cast and molded by adopting the anchor part form design of the temperature measuring plate, so that the complexity of the preparation method is greatly reduced, and the temperature measuring efficiency of the temperature measuring plate is effectively improved.
(5) And (3) optimizing a baking process: at present, the prefabricated member of the permanent layer of the tapping runner is not preheated after being poured, and the prefabricated member has a shrinkage phenomenon in the using process and causes the delamination and the crack between the prefabricated member and a working layer, thereby causing the penetration of molten iron. In addition, when the thermal reaction is not in place, the dehydration is not sufficient, the oxidation resistance of the material is poor easily caused by thermal dehydration in the using process, and the material also has obvious oxidation effect on the tapping channel material at the boundary. On site, the main channel material in contact with the permanent layer prefabricated member in the construction period is easy to oxidize, whiten and loosen. Therefore, the invention optimizes the temperature rise process, namely in the environment with carbon protection, the temperature rise speed is 10 ℃/min to 110 ℃ x 24h → the temperature rise speed is 15 ℃/min to 330 ℃ x 24h → the temperature rise speed is 15 ℃/min to 550 ℃ x 24h → the temperature rise speed is 20 ℃/min to 1000 ℃ x 24 h. The speed is kept at the normal temperature according to the average speed of 15 ℃/min, and the oxidation resistance of the iron runner prefabricated member treated by the process is obviously improved.
(6) Reducing the stress inside the tapping runner: because the internal part of the iron runner is easy to generate thermal stress in the long-term service process, two expansion joints are respectively arranged at the middle and the rear sections of the permanent layer of the iron runner, so as to absorb the volume change effect generated by temperature fluctuation, material reaction and the like. The invention designs the materials of the prefabricated base and the prefabricated side plate to be about micro expansion plus 0.3 percent, reduces the volume change generated by reaction, simultaneously considers the contraction and thermal expansion generated by temperature change and prevents the generation of cracks.
Drawings
FIG. 1 is a schematic view of a novel prefabricated tapping runner structure;
FIG. 2 is a sectional view of the novel prefabricated tapping runner;
FIG. 3 is a schematic view showing the connection relationship between the prefabricated base and the prefabricated side plate of the novel prefabricated tapping channel;
FIG. 4 is a schematic view of a novel prefabricated base structure of the prefabricated tapping runner;
FIG. 5 is a schematic structural view of a novel prefabricated tapping runner right T-shaped side wall veneer;
FIG. 6 is a schematic structural view of a novel prefabricated tapping runner inverted-T-shaped side wall single plate.
Detailed Description
The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1-6, a novel prefabricated iron runner comprises an outer steel shell 1, a permanent layer arranged in the outer steel shell 1 and a working layer 6 arranged on the permanent layer, wherein a groove 61 for molten iron to flow through is arranged on the working layer 6. Outer box hat 1 is made by the heat-resistant steel sheet that thickness is 25mm, and the 1 outside of outer box hat keeps the natural circulation of air or forced air cooling structural design, and 1 inside wall setting thickness that hugs closely outer box hat is 30mm insulating layer 2, and insulating layer 2 adopts high-efficient adiabatic fibreboard.
As shown in fig. 2 to 5, the permanent layer of the embodiment includes a permanent pouring layer 3, a prefabricated base 4 and a prefabricated side plate 5, the working layer 6 is disposed in a space enclosed by the permanent pouring layer 3, the prefabricated base 4 and the prefabricated side plate 5, the prefabricated side plate 5 is fixed to the prefabricated base 4 in an inserting manner, an arc-shaped protrusion 50 is disposed at the lower end of the prefabricated side plate 5, an arc-shaped groove 43 matched with the arc-shaped protrusion 50 is disposed on the prefabricated base 4, and the arc-shaped protrusion 50 is inserted into the arc-shaped groove 43.
The prefabricated base 4 of this application is assembled by a plurality of base pieces 41 along rectilinear direction and is formed, two adjacent base piece 41 interlocks are connected, prefabricated base 4 symmetry sets up in 1 bottom both sides of box hat, for pouring layer 3 forever between two prefabricated bases 4, prefabricated curb plate 5 is assembled along rectilinear direction by the lateral wall veneer 51 of a plurality of T types and forms, two adjacent lateral wall veneers 51 interlocks are connected, prefabricated curb plate 5 sets up both sides and is located in prefabricated base 4 top in 1 of box hat, be connected with prefabricated base 4 cartridge.
As shown in fig. 4, the base block 41 includes an L-shaped cross support 44 and a first boss 42 disposed on the cross support 44, an outer end surface, an upper end surface, and a lower end surface of the first boss 42 are all flush with the cross support 44, one end of the first boss 42 protrudes out of the cross support 44 to form a protruding section 46, and a first gap 45 is formed between the other end of the first boss 42 and the cross support 44, and two adjacent base blocks 41 are engaged with each other through the protruding section 46 and the first gap 45.
The first boss 42 and the transverse support 44 are integrally formed, and an arc-shaped groove 43 for inserting the prefabricated side plate 5 is integrally formed in the middle position of the upper end faces of the first boss 42 and the transverse support 44 along the length direction. Steps 47 are formed on the inner side of the transverse support 44 and the first boss 42, the vertical section of the permanent pouring layer 3 is T-shaped, and step surfaces matched with the steps 47 are arranged on two sides of the permanent pouring layer 3, so that the transverse support and the first boss are fixedly clamped.
As shown in fig. 5 and 6, the sidewall single plate 51 includes a plate body 55, one side surface of the plate body 55 is provided with a second boss 52, the other corresponding side surface is provided with a second notch 53, and an arc protrusion 50 matched with the arc groove 43 is arranged below the plate body 55.
The adjacent side wall single plates 51 are respectively a positive T-shaped side wall single plate 51 and an inverted T-shaped side wall single plate 51, and the positions of the second bosses 52 and the second notches 53 of the T-shaped side wall single plate 51 and the inverted T-shaped side wall single plate 51 are opposite, so that the T-shaped side wall single plate 51 and the inverted T-shaped side wall single plate 51 can be mutually meshed and connected through the second bosses 5 and the second notches 53.
The length of the base block 41 in this embodiment is 550mm, the length of the T-shaped side wall single plate 51 is 1220mm, and the thickness is 800mm, and the size can be adjusted according to the use situation. Threaded holes 54 for lifting are respectively arranged on the T-shaped prefabricated single plate 51 and the prefabricated base block 41.
As shown in fig. 2, a heat insulation layer 2 is arranged on the inner wall of an outer steel shell 1, a temperature measuring plate 7 is arranged on the outer side wall of a prefabricated side plate 5, the temperature measuring plate 7 is a Cu-Ag alloy plate, a temperature sensor is arranged on the temperature measuring plate 7, a cable of the temperature sensor penetrates through the outer steel shell 1 and is connected to a controller, in the embodiment, a thermocouple jack (not shown in the figure) is machined in the middle of the temperature measuring plate 7, the temperature sensor is a thermocouple, the thermocouple is inserted into the thermocouple jack, the sensor is connected with a PLC controller, and data acquisition and transmission are stable.
A novel preparation method of a prefabricated iron tapping channel comprises the steps of preheating a prefabricated base 4 and a prefabricated side plate 5 after pouring, gradually heating in a carbon-protected environment, and then carrying out heat preservation and cooling to normal temperature. Specifically, the temperature is raised to 110 ℃ at the temperature rise rate of 10 ℃/min, and then the temperature is controlled for 24 hours; heating to 330 ℃ at a heating rate of 15 ℃/min, and then controlling the temperature for 24 hours; heating to 550 ℃ at the heating rate of 15 ℃/min, then controlling the temperature for 24h, heating to 1000 ℃ at the heating rate of 20 ℃/min, then controlling the temperature for 24h, and finally carrying out heat preservation and cooling to the normal temperature at the average speed of 15 ℃/min.
The prefabricated side plate 5 is prefabricated and molded by adopting a high-strength alumina-silicon carbide material, and the silicon carbide has stable chemical property, high heat conductivity coefficient, small thermal expansion coefficient, high temperature resistance, high hardness and good wear resistance, so that the prefabricated side plate is suitable for manufacturing a refractory material with excellent shock resistance and high strength. Meanwhile, the introduced material of the silicon carbide has strong oxidation resistance and slag resistance.
The prefabricated base 4 is prefabricated and formed by adopting a low-expansion-rate mullite casting material, and the base is made of a mullite casting material which is mainly a mullite phase with low creep deformation and low thermal expansion rate and is reinforced by steel fibers. Mullite is a high-quality refractory material and has the characteristics of uniform expansion, excellent thermal shock stability, high refractoriness under load, small high-temperature creep value, high hardness, impact resistance and the like.
By using Al2O3The working layer 6 of the-SiC-C material is poured on the upper surface of the permanent layer through a die, the temperature measuring plate is made of Cu-Ag alloy, and the heat conducting performance, the corrosion resistance, the mechanical strength and the electric conductivity of the temperature measuring plate are remarkably improved compared with those of the traditional temperature measuring plate material Cu and other alloys. Temperature measurement is realized by adopting the design of the anchor part form of the temperature measurement plateThe plate 7 and the prefabricated side plate 5 are integrally cast and molded, and the process is simple and convenient to use.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (8)
1. A novel prefabricated tapping runner, which is characterized by comprising: the prefabricated steel shell comprises an outer steel shell (1), a permanent layer and a working layer (6), wherein the permanent layer and the working layer are arranged in the outer steel shell (1), the permanent layer comprises a permanent pouring layer (3), a prefabricated base (4) and prefabricated side plates (5), the working layer (6) is arranged in a space formed by enclosing the permanent pouring layer (3), the prefabricated base (4) and the prefabricated side plates (5), the prefabricated side plates (5) and the prefabricated base (4) are fixedly inserted, circular arc-shaped protrusions (50) are arranged at the lower ends of the prefabricated side plates (5), and circular arc-shaped grooves (43) matched with the circular arc-shaped protrusions (50) are arranged on the prefabricated base (4);
the prefabricated base (4) is formed by assembling a plurality of base blocks (41) along a straight line direction, two adjacent base blocks (41) are connected in an occluded manner, the prefabricated side plate (5) is formed by assembling a plurality of T-shaped prefabricated side wall single plates (51) along the straight line direction, and two adjacent single plates are connected in an occluded manner; the T-shaped prefabricated side wall single plate (51) is contacted with the prefabricated base (4) through the arc-shaped groove, flexible butt joint of the T-shaped prefabricated side wall single plate (51) and the prefabricated base (4) is achieved, when the T-shaped prefabricated side wall single plate (51) is replaced, the T-shaped prefabricated side wall single plate (51) can be rotated due to the arc-shaped groove, the T-shaped prefabricated side wall single plate (51) cannot be scratched with the heat insulation plate and the prefabricated base (4) after rotating at a certain angle, and the prefabricated side wall single plate (51) is separated from the prefabricated base (4) without damage;
a temperature measuring plate (7) is arranged on the outer side wall of the prefabricated side plate (5), a temperature sensor is arranged on the temperature measuring plate (7), and the temperature sensor is connected with a PLC (programmable logic controller); the temperature measuring plate (7) is integrally cast and molded with the prefabricated member by adopting an anchoring part form plate.
2. The new prefabricated runner of claim 1, further comprising: the base blocks (41) comprise L-shaped transverse supports (44) and first bosses (42) arranged on the transverse supports (44), one ends of the first bosses (42) protrude out of the transverse supports (44) to form protruding sections (46), first gaps (45) are formed between the other ends of the first bosses and the transverse supports (44), and two adjacent base blocks (41) are mutually connected in a meshed mode through the protruding sections (46) and the first gaps (45).
3. The new prefabricated runner of claim 2, further comprising: the first boss (42) and the transverse support (44) are integrally formed, and an integrated circular arc-shaped groove (43) is formed at the upper parts of the first boss (42) and the transverse support (44).
4. The new prefabricated runner of claim 1, further comprising: the side wall veneer (51) comprises a plate body (55), wherein one side surface of the plate body (55) is provided with a second boss (52), the other corresponding side surface of the plate body (55) forms a second notch (53), and an arc-shaped bulge (50) is arranged below the plate body (55).
5. The new prefabricated runner of claim 4, characterized in that: the adjacent side wall single plates (51) are respectively a positive T-shaped side wall single plate and an inverted T-shaped side wall single plate, and the positions of the second bosses (52) of the T-shaped side wall single plate (51) and the inverted T-shaped side wall single plate (51) are opposite, so that the T-shaped side wall single plate and the inverted T-shaped side wall single plate are mutually meshed and connected.
6. The new prefabricated runner of claim 1, further comprising: and a heat insulation layer (2) is arranged on the inner wall of the outer steel shell (1).
7. The method for the production of a prefabricated runner according to any one of claims 1 to 6, characterized in that: preheating the prefabricated base (4) and the prefabricated side plates (5) after pouring, gradually heating in a carbon-protected environment, and then cooling to normal temperature in a heat-preservation manner; the specific process of gradually heating up is as follows: heating to 110 ℃ at a heating rate of 10 ℃/min, and then controlling the temperature for 24 hours; heating to 330 ℃ at a heating rate of 15 ℃/min, and then controlling the temperature for 24 hours; heating to 550 ℃ at the heating rate of 15 ℃/min, then controlling the temperature for 24h, heating to 1000 ℃ at the heating rate of 20 ℃/min, then controlling the temperature for 24h, and finally carrying out heat preservation and cooling to the normal temperature at the average speed of 15 ℃/min.
8. The novel preparation method of the prefabricated runner according to claim 7, characterized in that: the prefabricated side plate (5) is made of high-strength alumina-silicon carbide materials, and the prefabricated base (4) is made of low-expansion-rate mullite castable.
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| CN202011332839.7A CN112359157B (en) | 2020-11-23 | 2020-11-23 | Novel prefabricated iron runner and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3265148B2 (en) * | 1995-03-07 | 2002-03-11 | 新日本製鐵株式会社 | Blast furnace water-cooled slag gutter |
| CN209024572U (en) * | 2018-09-26 | 2019-06-25 | 山东省冶金设计院股份有限公司 | A kind of air-cooled sow |
| CN110093469B (en) * | 2019-06-14 | 2023-11-17 | 郑州赛沃科技有限公司 | Prefabricated tapping channel |
| CN110542485B (en) * | 2019-10-15 | 2024-04-09 | 北京瑞尔非金属材料有限公司 | Measuring device and manufacturing method for lining temperature of main runner of blast furnace molten iron |
| CN111187868A (en) * | 2020-02-25 | 2020-05-22 | 中冶赛迪工程技术股份有限公司 | Blast furnace tapping main channel capable of comprehensively monitoring temperature |
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