CN207494550U - Collector nozzle and process equipment - Google Patents
Collector nozzle and process equipment Download PDFInfo
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- CN207494550U CN207494550U CN201721550935.2U CN201721550935U CN207494550U CN 207494550 U CN207494550 U CN 207494550U CN 201721550935 U CN201721550935 U CN 201721550935U CN 207494550 U CN207494550 U CN 207494550U
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- core
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Abstract
The utility model provides a kind of collector nozzle and process equipment, is related to the technical field of refractory material.Collector nozzle includes core, matrix and metal-back；The core, matrix and metal-back are socketed successively from the inside to the outside；The core has the sluice way of guiding molten steel circulation, and the core is detachably connected in described matrix, and described matrix is socketed in the metal-back.It solves in the prior art, collector nozzle is in steel mill in use, since collector nozzle is directly scrapped using rear, it is impossible to the technical issues of carrying out recycling secondary use, the refractory material in collector nozzle is made also to scrap together, refractory material is caused to waste.Using dismountable connection mode between the core of the utility model, matrix and metal-back, after collector nozzle use, directly core can be disassembled and replaced, the refractory material in collector nozzle is unaffected, so as to save the cost of refractory material.
Description
Technical field
The utility model is related to the technical field of refractory material, more particularly, to a kind of collector nozzle and process equipment.
Background technology
Collector nozzle is mainly used to control molten steel flow and note speed.It is required that there is good abrasion resistance, under high temperature under high temperature
Volume stability is good, and has certain self-fluxing nature.Collector nozzle is in use, and the molten steel in ladle is because of static pressure as molten steel amount subtracts
Decline less, but the rate of cast is required to keep similar to opening the initial stage of pouring, this requires materials with corresponding molten loss rate, to protect
Demonstrate,prove the flow that molten steel is stablized.It such as pours into a mould straight carbon steel and High-Alumina, vitreous silica matter can be selected；It, can when cast is containing manganese higher steel grade
The collector nozzles such as aluminium carbonaceous, magnesia.To improve the thermal shock resistance of collector nozzle, collector nozzle is mounted in iron set, prevents from cracking.
Collector nozzle is during making, the molding method of generally use machine pressing, during compacting, collector nozzle
Refractory material is one-pass molding, has both avoided unnecessary crack, and collector nozzle is when in use, also more durable.
It is above-mentioned in the prior art, collector nozzle is destructurized due to refractory portion after steel mill's use, it will usually
Directly scrap；Refractory material is a kind of inorganic non-metallic material that a kind of refractoriness is not less than 1580 DEG C, and refractory material is used extensively
In industrial circles such as metallurgy, chemical industry, oil, machine-building, silicate, power, dosage is maximum in metallurgical industry, accounts for total output
50%~60%, refractory material plays irreplaceable important function in industrial production development, and refractories industry is kept
Good growing trend, still, in refractories industry, since random mining, processing technology level be not high, resource comprehensive profit
Relatively low with level, waste is more serious, and above-mentioned mineral resources, particularly high-grade refractory raw material resource are fewer and fewer, especially
It is that steel mill directly scraps after collector nozzle is used, but metal-back and part refractory material also have utility value, thus to fire resisting
Material causes a certain amount of waste.
Utility model content
The purpose of this utility model is to provide a kind of collector nozzles, and in the prior art to solve, collector nozzle is in steel
In use, since collector nozzle is directly scrapped using rear, the refractory material and metal-back in collector nozzle are also scrapped together, are caused resistance to for factory
The technical issues of fiery waste of material.
The utility model also provides a kind of process equipment, and to solve in the prior art, processing efficiency is low, and collector nozzle is not
The technical issues of refractory material can be made full use of.
A kind of collector nozzle provided by the utility model, including core, matrix and metal-back；
The core, matrix and metal-back are socketed successively from the inside to the outside；The core has the drainage of guiding molten steel circulation
Road, the core are detachably connected in described matrix, and described matrix is socketed in the metal-back.
Further, described matrix has installation passage, and the core is socketed in the installation passage；
The installation passage and the sluice way are set along same vertical centerline.
Further, the inner peripheral surface of the installation passage is relatively narrow stepped of the wider other end in one end, the core
Peripheral surface is relatively narrow stepped of the wider other end in one end.
Further, the shape of the wider one end of the installation passage is from one end to the gradually smaller rounding of other end diameter
Taper, the shape of described wider one end of core is from one end to the gradually smaller inverted cone-shaped of other end diameter.
Further, the height of the wider one end of the installation passage is more than the height of the wider one end of the core.
Further, chromium matter chamotte layer is further included；
The chromium matter chamotte layer is arranged on what is connected between the peripheral surface of the core and the inner peripheral surface of the installation passage
At gap.
Further, high-alumina chamotte layer is further included；
The high-alumina chamotte layer is arranged on the seam connected between the peripheral surface of described matrix and the inner peripheral surface of the metal-back
At gap.
Further, the height of the metal-back is less than the height of described matrix.
Further, the metal-back is box hat.
The utility model also provides a kind of process equipment, including mounting base, the mounting base installation collector nozzle.
A kind of collector nozzle provided by the utility model, the socket connection successively from the inside to the outside of the core, matrix and metal-back,
Sluice way is equipped at the center of the core, the sluice way is used for the circulation of molten steel, molten steel is made to circulate only along sluice way, no
Can with outside core, matrix and metal-back contact；The core is socketed in inside described matrix, so that described matrix is to the core
The outside of body is protected, and described matrix is socketed in inside the metal-back, so that outside of the metal-back to described matrix
It is protected, due to being to be detachably connected between the core and matrix, either between core and matrix or in matrix
The filling fire resisting material between metal-back after collector nozzle use, can disassemble the core after using, and carry out
Replace, and be connected to the refractory material on collector nozzle and be unaffected, by new core body replacing after, can continue
It uses, the utilization rate of collector nozzle is improved, so as to save the cost of refractory material.
The utility model also provides a kind of process equipment, which installs above-mentioned collector nozzle, improves adding for collector nozzle
Work efficiency rate.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
Under the premise of labour, other attached drawings are can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram that core, matrix and the metal-back that the utility model embodiment provides connect；
Fig. 2 is the structure diagram that the matrix that the utility model embodiment provides is connected with metal-back；
Fig. 3 is the structure diagram of core that the utility model embodiment provides；
Fig. 4 is the production method flow chart of collector nozzle that the utility model embodiment provides.
Icon：100- cores；200- matrixes；300- metal-backs；400- chromium matter chamotte layers；500- high-alumina chamotte layers；
101- sluice ways；201- installation passages.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model part of the embodiment, instead of all the embodiments.Based on the embodiment in the utility model, sheet
Field those of ordinary skill all other embodiments obtained without making creative work, belong to this practicality
Novel protected range.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instructions such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
The utility model must have specific with the device or element for simplifying description rather than instruction or hint meaning for ease of description
Orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.In addition, term " the
One ", " second ", " third " are only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection；Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, can above-mentioned art be understood with concrete condition
Concrete meaning of the language in the utility model.
Fig. 1 is the structure diagram that core, matrix and the metal-back that the utility model embodiment provides connect；Fig. 2 is this
The structure diagram that the matrix that utility model embodiment provides is connected with metal-back；Fig. 3 is what the utility model embodiment provided
The structure diagram of core；Fig. 4 is the production method flow chart of collector nozzle that the utility model embodiment provides.
As shown in figures 1-4, a kind of collector nozzle provided by the utility model, including core 100, matrix 200 and metal-back
300；
The core 100, matrix 200 and metal-back 300 are socketed successively from the inside to the outside；The core 100 has guiding steel
The sluice way 101 that flow is led to, the core 100 are detachably connected in described matrix 200, and described matrix 200 is socketed in described
In metal-back 300.
As shown in Figure 1, the core 100, which is arranged on most the inside, described matrix 200, is socketed in the outside of the core 100,
The metal-back 300 is socketed in the outside of described matrix 200 so that the core 100 of collector nozzle, matrix 200 and metal-back 300 by
It is interior to outer to set gradually, and be detachably connected between the core 100, matrix 200 and metal-back 300, make convenient for collector nozzle
With rear, core 100 is replaced, reuses matrix and box hat, greatly saves the cost of refractory material.The core
100 use compound core body, and the flexural strength and compressive resistance of collector nozzle, bulk density and apparent pore are improved using compound core body
Rate is good.Described matrix 200 is made of alumina graphite material.
Further, the metal-back 300 uses box hat, and the intensity of box hat is good, hardness is big, wearability is good, corrosion resistance
By force, box hat is socketed in outermost position, not only the outside of described matrix 200 is protected, the drainage of the core 100
When flowing through molten steel in road 101, molten steel will not be contacted with outermost box hat, effectively avoid connecing between molten steel and box hat
It touches；In addition, the material of the metal-back 300 can also use aluminium, copper etc..
Further, described matrix 200 has installation passage 201, and the core 100 is socketed in the installation passage 201
It is interior；
The installation passage 201 and the sluice way 101 are set along same vertical centerline.
As shown in Fig. 2, the sluice way 101 is vertically arranged cylindric, the installation passage 201 is vertically arranged
Cylindric, the diameter of the installation passage 201 is more than the diameter of the sluice way 101, so that the peripheral surface energy of the core 100
The inside of the installation passage 201 is enough socketed in, the height of the sluice way 101 is less than the height of the installation passage 201, with
Molten steel is enable to be flowed along the sluice way 101, without being polluted in contact to the installation passage 201；The peace
It fills channel 201 and the sluice way 101 to set along same vertical centerline, so that the core 100 can be connected to institute
At the center for stating installation passage 201, the sluice way 101 is arranged at the vertical center of the core 100, makes molten steel along institute
When stating sluice way 101 and flowing, the installation site of the core 100 is more stablized, the phenomenon that being not in shaking.
Further, the inner peripheral surface of the installation passage 201 stepped, the core relatively narrow for the wider other end in one end
100 peripheral surface is relatively narrow stepped of the wider other end in one end.
As shown in Fig. 2, the upper end diameter of the inner peripheral surface of the installation passage 201 is longer, lower end diameter is shorter, makes the peace
The inner peripheral surface of dress channel 201 forms wide at the top and narrow at the bottom stepped；As shown in figure 3, the upper end diameter of the peripheral surface of the core 100
Longer, lower end diameter is shorter, make the core 100 peripheral surface formed it is wide at the top and narrow at the bottom stepped；The core 100 is socketed in
In the installation passage 201, the cascaded surface phase of the cascaded surface of 100 peripheral surface of core and 201 inner peripheral surface of installation passage
Be connected together, connection more securely, make the stability that the core 100 combines good.
Further, the shape of described 201 wider one end of installation passage is gradually smaller from one end to other end diameter
Inverted cone-shaped, the shape of described 100 wider one end of core is from one end to the gradually smaller inverted cone-shaped of other end diameter.
As shown in Fig. 2, the upper end of the inner peripheral surface of the installation passage 201 forms inverted cone-shaped, in the installation passage 201
The diameter of the upper end of part is held to be more than the diameter of lower end；As shown in figure 3, the upper end of the peripheral surface of the core 100 is also formed down
Coniform, the diameter of the upper end of 100 upper part of core is more than the diameter of lower end；The core 100 is socketed in the peace
It fills in channel 201, the inverted cone-shaped peripheral surface upper end of the core 100 and the inverted cone-shaped inner peripheral surface of the installation passage 201
Upper end is connected together, and when molten steel is flowed along the sluice way 101 in the core 100, the flow direction of molten steel is from inverted cone
Wider one end of shape is flowed to coniform relatively narrow one end, and the core 100 is enable quickly to be pasted with the installation passage 201
Close connection.
Further, the height of described 201 wider one end of installation passage is more than the height of described 100 wider one end of core.
As shown in Figure 1, the height of the upper end of the installation passage 201 is more than the height of the upper end of the core 100, so that
The inverted cone-shaped upper end of the core 100 is contained in the lower position of the inverted cone-shaped upper end of the installation passage 201, the peace
The upper position of the inverted cone-shaped upper end of channel 201 is filled for being connected with equipment, makes equipment that molten steel is introduced directly into described draw
Runner 101, molten steel will not pollute the equipment of surrounding.
Further, chromium matter chamotte layer 400 is further included；
The chromium matter chamotte layer 400 be arranged on the core 100 peripheral surface and the installation passage 201 inner peripheral surface it
Between at the gap that connects.
Chromium oxide in the chromium matter chamotte layer 400 accounts for 8%, is made of chamotte, high temperature resistance is good, corrosion resistance
It is good, the chromium matter chamotte layer 400 is filled between the peripheral surface of the core 100 and the inner peripheral surface of the installation passage 201
At the gap of connection, the antioxygenic property for making entire collector nozzle is high, and stability is good, and the sealing performance of entire collector nozzle and
High temperature resistance is good.
Further, high-alumina chamotte layer 500 is further included；
The high-alumina chamotte layer 500 is arranged between the peripheral surface of described matrix 200 and the inner peripheral surface of the metal-back 300
At the gap of connection.
The high temperature resistance of the high-alumina chamotte layer 500 is preferable, and the high-alumina chamotte layer 500 is filled in described matrix
At the gap connected between the inner peripheral surface of 200 peripheral surface and the metal-back 300, make the high temperature resistance of entire collector nozzle
It is good, good corrosion resistance.
Further, the height of the metal-back 300 is less than the height of described matrix 200.
As shown in Fig. 2, the upper end level of the metal-back 300 is less than the height of 200 upper end of described matrix, the metal-back
300 lower end height is less than the height of 200 lower end of described matrix, so that the metal-back 300 is set in the outer of described matrix 200
After circumferential surface, the upper end of the metal-back 300 is stretched out in the upper end of described matrix 200, and the metal is stretched out in the lower end of described matrix 200
The lower end of shell 300, the metal-back 300 are arranged on the peripheral surface centre position of described matrix 200, so as to avoid molten steel along
When the sluice way 101 is to flows outside, contacted with external metal-back 300.
Further, the core 100 is compound core body；
The component ratio of the compound core body is as follows：Weight percent shared by plate diamond spar be 60-70%, white fused alumina institute
Weight percent is accounted for as 10-15%, weight percent shared by spinelle is 5-15%, and weight percent shared by alumina powder is
Weight percent shared by 10-18%, ρ alumina powder is 4-10%.
During the component ratio to compound core body matches, weight percent shared by the plate diamond spar can be with
It is 65%, weight percent shared by the white fused alumina can be 15%, and weight percent shared by the spinelle can be 5%,
Weight percent shared by the alumina powder can be 10%, and weight percent shared by the ρ alumina powders can be 5%,
During actual disposition, appropriate debugging can also be carried out to mentioned component ratio, is matched, made whole using aforementioned proportion
Flexural strength, compressive resistance, bulk density and the apparent porosity of a collector nozzle reach best numerical value.The plate diamond spar
In ingredient, plate diamond spar is divided into following four granularity：180 targeted fine powders, the particulate material of 0-1mm, the particulate material of 1-3mm, 3-
The particulate material of 5mm, the proportional region shared by fine powder are 35-45%, the preferably ratio shared by the particulate material of 40%, 0-1mm
Range encloses 15-20%, and the preferably proportional region shared by the particulate material of 15%, 1-3mm is 30-35%, and preferably 30%,
Proportional region shared by the particulate material of 3-5mm is 10-15%, preferably 15%.The white fused alumina is divided into following four granularity：
180 targeted fine powders, the particulate material of 0-1mm, the particulate material of 1-3mm, the particulate material of 3-5mm.The granularity of the spinelle is
320 mesh, the granularity of the alumina powder is 320 mesh and 5um, and the granularity of the ρ alumina powders is 5um.Compound core body uses nothing
Cement generates Behavior of Hardened Cement Paste under cement high temperature and influences the elevated temperature strength and erosion resisting of resistance to material with reference to avoiding.
Collector nozzle provided by the utility model, the core are socketed in described matrix, in the core and described matrix
Between filled with chromium matter chamotte layer, the high temperature resistance of the chromium matter chamotte layer is good, good corrosion resistance, and the core use finishes
Afterwards, directly core out of matrix can be disassembled, and new core is socketed in described matrix, core can be reused
External refractory material, has saved raw material, the material outside core is enable to reuse, and recovery utilization rate is high；The base
The outside of body is socketed with metal-back, and the metal-back protects the outside of described matrix, in described matrix and the metal
Filled with high-alumina chamotte layer between shell, the high temperature resistance of the high-alumina chamotte layer is good, enables described matrix and the metal
Shell firmly combines.
As shown in figure 4, the production method of collector nozzle, includes the following steps：
A. matrix is made
With machine by 200 compression moulding of matrix, matrix 200 after molding is carried out in 200 DEG C of -250 DEG C of temperature ranges
Drying；
Aluminium carbonaceous raw material are put into blender and are stirred batch mixing, after stirring 15 minutes, by mixed raw material
It inputs in bucket, mechanical pressing matrix 200 is molded after eight hours of ageing mixture, and matrix 200 after molding is placed on hothouse
It is inside dried, from room temperature to 220 DEG C of drying.
B. core is made
The mode that cast vibration moulding is combined with no cement makes core 100, then by core 100 at 1000 DEG C -1500
It is fired within the temperature range of DEG C；
Weight percent shared by plate diamond spar is 60-70%, and weight percent shared by white fused alumina is 10-15%, and point is brilliant
Weight percent shared by stone be 5-15%, weight percent shared by alumina powder be 10-18%, weight shared by ρ alumina powders
Percentage is 4-10%；It is 65% by the parts by weight of plate diamond spar, the parts by weight of white fused alumina are 15%, the parts by weight of spinelle
It is 5%, the parts by weight of alumina powder are that the parts by weight of 10%, ρ alumina powders are sequentially placed into for 5% in blender, dry-mixed five points
Zhong Hou, adds water while stirring, and carries out wet mixing, mixing speed 50r/min, and after wet mixing ten minutes, above-mentioned mold is fixed
On shaking platform, shake table is opened, pug is gradually added, after vibration moulding, core 100 after molding is placed on hothouse
It is inside dried, dry indoor temperature is 60 DEG C, is fired after demoulding.
C. assembled inside
Core 100 is inserted in matrix 200, the junction filling chromium matter chamotte layer between core 100 and matrix 200
400, after being completed, dried in 100 DEG C of -150 DEG C of temperature ranges；
Core 100 is assembled in matrix 200, and between the peripheral surface of core 100 and the inner peripheral surface of matrix 200
Fill chromium matter chamotte layer 400 at gap, filling chromium matter chamotte layer 400 makes that the high temperature resistance of collector nozzle is good, and antioxygenic property is strong,
Stability is good, after the completion of filling, the collector nozzle after assembling is placed in hothouse and is dried, and dry indoor temperature can be with
It is 120 DEG C.
D. it is external to assemble
Metal-back 300 is socketed in the outside of matrix 200, the junction filling between matrix 200 and metal-back 300 is high
Aluminium chamotte layer 500.
Assembled collector nozzle is fixed, and metal-back 300 is fixed on to the outside of collector nozzle, passes through pressure apparatus pressure
It is removed after to specified position, is placed in hothouse and is dried, complete the manufacturing process of entire collector nozzle.
Using the production method of above-mentioned collector nozzle, in collector nozzle use have good high temperature resistance, erosion-resisting characteristics,
Flushing resistance is good, long lifespan, has saved cost, and collector nozzle can meet when in use it is various under the conditions of steel-making need
It asks.
The utility model also provides a kind of process equipment, including mounting base, the mounting base installation collector nozzle.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to foregoing embodiments, those of ordinary skill in the art should
Understand：It can still modify to the technical solution recorded in foregoing embodiments either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacement, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of collector nozzle, which is characterized in that including core (100), matrix (200) and metal-back (300)；
The core (100), matrix (200) and metal-back (300) are socketed successively from the inside to the outside；The core (100), which has, draws
The sluice way (101) of molten steel circulation is led, the core (100) is detachably connected in described matrix (200), described matrix
(200) it is socketed in the metal-back (300).
2. collector nozzle according to claim 1, which is characterized in that described matrix (200) has installation passage (201), institute
Core (100) is stated to be socketed in the installation passage (201)；
The installation passage (201) and the sluice way (101) are set along same vertical centerline.
3. collector nozzle according to claim 2, which is characterized in that the inner peripheral surface of the installation passage (201) for one end compared with
Relatively narrow stepped of the wide other end, stepped relatively narrow for the wider other end in one end of the peripheral surface of the core (100).
4. collector nozzle according to claim 3, which is characterized in that the shape of the wider one end of the installation passage (201) is
From one end to the gradually smaller inverted cone-shaped of other end diameter, the shape of the wider one end of the core (100) is from one end to another
The gradually smaller inverted cone-shaped of one end diameter.
5. collector nozzle according to claim 2, which is characterized in that the installation passage (201) is big compared with the height of wide one end
Height in the core (100) wider one end.
6. collector nozzle according to claim 2, which is characterized in that further include chromium matter chamotte layer (400)；
The chromium matter chamotte layer (400) is arranged on the peripheral surface of the core (100) and the inner peripheral surface of the installation passage (201)
Between at the gap that connects.
7. collector nozzle according to claim 1, which is characterized in that further include high-alumina chamotte layer (500)；
The high-alumina chamotte layer (500) be arranged on described matrix (200) peripheral surface and the metal-back (300) inner peripheral surface it
Between at the gap that connects.
8. collector nozzle according to claim 1, which is characterized in that the height of the metal-back (300) is less than described matrix
(200) height.
9. collector nozzle according to claim 1, which is characterized in that the metal-back (300) is box hat.
10. a kind of process equipment, which is characterized in that any in the mounting base installation such as claim 1-9 including mounting base
Collector nozzle described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721550935.2U CN207494550U (en) | 2017-11-20 | 2017-11-20 | Collector nozzle and process equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721550935.2U CN207494550U (en) | 2017-11-20 | 2017-11-20 | Collector nozzle and process equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207494550U true CN207494550U (en) | 2018-06-15 |
Family
ID=62504853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721550935.2U Active CN207494550U (en) | 2017-11-20 | 2017-11-20 | Collector nozzle and process equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207494550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716912A (en) * | 2017-11-20 | 2018-02-23 | 河南新拓耐火材料有限公司 | The preparation method of collector nozzle and collector nozzle |
| CN112521167A (en) * | 2020-12-08 | 2021-03-19 | 洛阳科创新材料股份有限公司 | Chrome corundum spinel tapping hole head brick for eccentric electric furnace and preparation method thereof |
-
2017
- 2017-11-20 CN CN201721550935.2U patent/CN207494550U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107716912A (en) * | 2017-11-20 | 2018-02-23 | 河南新拓耐火材料有限公司 | The preparation method of collector nozzle and collector nozzle |
| CN112521167A (en) * | 2020-12-08 | 2021-03-19 | 洛阳科创新材料股份有限公司 | Chrome corundum spinel tapping hole head brick for eccentric electric furnace and preparation method thereof |
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