CN109055666A - A kind of dephosphorization spray gun and its special precast material - Google Patents
A kind of dephosphorization spray gun and its special precast material Download PDFInfo
- Publication number
- CN109055666A CN109055666A CN201811092038.0A CN201811092038A CN109055666A CN 109055666 A CN109055666 A CN 109055666A CN 201811092038 A CN201811092038 A CN 201811092038A CN 109055666 A CN109055666 A CN 109055666A
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- powder
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- spray gun
- mesh
- steel pipe
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
It dusts dedicated prefabricated material outside steel pipe the invention discloses a kind of novel dephosphorization spray gun and dephosphorization spray gun.According to the working condition of dephosphorization spray gun; the refractory material protective layer of integral structure is changed to be assembled by shifting to an earlier date heat-resisting protective cover, supporting plate and the identical fireproof sleeve block of multiple structures that the prefabricated prefabricated material prepared using artificial synthesized spinelle, plate diamond spar, high-purity fused magnesite, monoclinic zirconia and rare earth oxide is fired, the alkali resistance slag and FeO for improving dephosphorization spray gun corrode；Monoclinic zirconia, plate diamond spar, rare earth material and the high-purity fused magnesite of addition form micro-crack in material firing and use, improve toughness of material and heat-resistant knocking stability；In-suit spinel can be formed in material simultaneously, causes a small amount of volume expansion, contraction when material at high temperature firing has been compensated well for, has maintained the volume stability of material；The introducing of rare earth oxide improves the microstructure of material, improves the refractoriness of glass phase, enhances the corrosion resistance and wearability of material.
Description
Technical field
The present invention relates to refractory material, more particularly, to a kind of dephosphorization spray gun, dust steel the invention further relates to dephosphorization spray gun
The prefabricated material of pipe external dedicated.
Background technique
Dephosphorization of molten iron is an important procedure of ironmaking, is affected to molten steel quality and casting quality.Dephosphorization process makes
Tool is dephosphorization spray gun, is the steel pipe of resistance to hot spraying powder inside dephosphorization spray gun, and steel pipe is symmetrically arranged at the front end with two spray orifices and carries out
Dust operation, the steel pipe of resistance to hot spraying powder outside casting corundum-mullite or high alumina Low Cement Castable.Due to being steel pipe in spray gun,
The refractory material of outside casting can not carry out high temperature sintering, can only drying and processing, then by high temperature liquid iron using gradually
Sintering, for protecting internal layer to dust steel pipe；To improve intensity, the stability of reinforced structure is also welded outside the steel pipe of resistance to hot spraying powder
It is connected to solid V-type anchor steel nail and reinforcement plate.
Due to needing stronger oxidisability clinker when dephosphorization, it usually needs iron phosphorus is added into molten iron with dephosphorization spray gun or blows
Oxygen forms the oxidation caustic slag for being rich in FeO, improves dephosphorization efficiency, to improve slugging efficiency or needing to be added lime, dolomite
Or fluorite, such oxidisability basic slag is more serious to the erosion of corundum-mullite spray gun, and spray gun blow powder vibration and
The heat-flash stress of the inconsistent generation of steel pipe and the corundum-mullite coefficient of expansion, and use when spray gun actual condition (first is that
From the high temperature liquid iron that room temperature is inserted directly into 1500 DEG C or so, the excessive temperature difference, which is easy to appear, to be burst；Second is that refractory material is by outer
When the inside step temperature of high temperature rises to medium temperature, cementitious binder equal strength can decline；Third is that refractory material can generate when being sintered
Liquid phase bonding, due to not condensing, refractory material is soft at this time, and intensity is lower, is easier to chip off-falling under molten iron impact；Fourth is that
As step temperature is constantly to increasing inside refractory material, because the coefficients of expansion such as steel and resistance to material are inconsistent, make refractory material
Generation vertical and horizontal split fried) caused by, it easily causes the cracking of spray gun (external cast bed of material), corrode.Chip off-falling and deformation, greatly
Ground reduces the service life of spray gun.It current general dephosphorization spray gun service life only 3-5 times, not more than 16 times, restricts
The development of ironmaking casting industry.Therefore it is imperative to develop a kind of dedicated new material of dephosphorization spray gun.
Summary of the invention
The purpose of the present invention is to provide one kind can be reduced slag corrosion and infiltration, dephosphorization spray gun with long service life, sheet
Invention also provides the dedicated prefabricated material of refractory protection outside the steel pipe that dusts of dephosphorization spray gun.
To achieve the above object, the present invention can take following technical proposals:
Novel dephosphorization spray gun of the present invention steel pipe and is coated on the heat-resisting guarantor dusted on steel pipe outer peripheral surface including dusting
Sheath, the steel pipe front end of dusting symmetrically offer powder injection hole；It is provided with heat-resisting protective cover outside the powder injection hole, is dusted with described
Through-hole is offered on the corresponding heat-resisting protective cover in hole site, the branch pipe that dusts being screwed on the powder injection hole extends into described logical
In hole；Location nut, the heat-resisting protective of the location nut front end have been screwed on the steel pipe that dusts in the heat-resisting protective cover
Set is embedded to be placed with supporting plate, and the supporting plate is fixedly connected with by the pin of circumferentially equalization setting with the heat-resisting protective cover side wall；Institute
The refractory protection that heat-resisting protective cover rear portion is dusted on steel pipe is stated to be spliced by the identical fireproof sleeve block of multiple structures, it is described resistance to
Fire set block one end is provided with round boss, and the other end is provided with the groove being adapted with the boss；Positioned at the fireproof sleeve block
Gap package has collet on the interior steel pipe that dusts；It dusts described in the fireproof sleeve block rear portion and is disposed with top on steel pipe
Press the holddown spring of the fireproof sleeve block and with internal thread clam member, offered on the outer wall of steel pipe that dusts and its
Matched external screw thread；The holddown spring outer sheath attaching has spring protecting sleeve.
Dephosphorization spray gun special precast material of the present invention, the special precast material for fire heat-resisting protective cover, supporting plate and
Fireproof sleeve block；Be by the artificial synthesized spinelle of raw material, plate diamond spar, high-purity fused magnesite, monoclinic zirconia, rare earth oxide by
It is formulated according to following weight parts:
66 ~ 73 parts of artificial synthesized spinelle, 15 ~ 26 parts of plate diamond spar, 5 ~ 6 parts of high-purity fused magnesite, 3 ~ 5 parts of monoclinic zirconia,
1 part of rare earth oxide.
The artificial synthesized spinel charge includes 320 mesh of particulate material and partial size of 0.1 ~ 1mm of partial size, 1 ~ 3mm and 3 ~ 5mm
Powder；The rare earth oxide is for cerium oxide or including cerium oxide (CeO2), lanthana (La2O3), yttrium oxide (Y2O3), oxygen
Change neodymium (Nd2O3), europium oxide (Eu2O3) etc. components composite rare-earth oxide, each component content is general in composite rare-earth oxide
For CeO225-32%, La2O330-32%, Nd2O33.36%, Y2O31-5%, Eu2O3 0.1-0.3%。
The plate diamond spar is the powder of 320 mesh of partial size；High-purity fused magnesite is the powder of 180 mesh of granularity；It is described
Monoclinic zirconia is the powder of 320 ~ 325 mesh of partial size；The rare earth oxide is the powder of 200 ~ 320 mesh of granularity.
When practical preparation, each raw material can be prepared according to following weight: the artificial synthesized spinelle of 3 ~ 5mm
30 parts of pellet, 15 parts of artificial synthesized spinel particle material of 1 ~ 3mm, the artificial synthesized spinel particle material 20 of 0.1 ~ 1mm
Part, 26 parts of the plate diamond spar powder of 320 mesh, 5 parts of the high-purity fused magnesite powder of 180 purposes, the monoclinic zirconia powder 3 of 320 mesh
Part；200 mesh contain 1 part of composite rare-earth oxide of the components such as cerium oxide, lanthana, yttrium oxide, neodymia, europium oxide.
Each raw material can also be prepared according to following weight parts: the artificial synthesized spinel particle material 25 of 3 ~ 5mm
Part, 20 parts of artificial synthesized spinel particle material of 1 ~ 3mm, 15 parts of artificial synthesized spinel particle material of 0.1 ~ 1mm, 320 mesh
13 parts of artificial synthesized spinelle powder, 15 parts of the plate diamond spar powder of 320 mesh, 6 parts of the high-purity fused magnesite powder of 180 purposes,
5 parts of the monoclinic zirconia powder of 320 mesh；1 part of the cerium oxide powder of 320 mesh.
Preparation method are as follows: all raw materials are uniformly mixed first, then with mold be pressed into heat-resisting protective cover, supporting plate and
The blanks such as fireproof sleeve block, into after 1600 DEG C of high temperature firings, repairing types, it to be successively assembled in resistance to hot spraying powder in electric heating shuttle kiln
Steel pipe is outer.
The physical and chemical index of heat-resisting protective cover, supporting plate and fireproof sleeve block after firing are as follows:
To avoid permeating because of step temperature to steel pipe, present invention gap (gap reserved on the steel pipe that dusts in fireproof sleeve block
About 1mm or so meets the microdilatancy for the steel pipe that dusts) it is set with collet, collet special precast material is by raw material
Lightweight calcium sulphoaluminate, the white alundum powder of 200 mesh, the ultra-fine alumina fine powder of granularity≤1.0 μm, granularity≤5.0 μm active oxygen
Change aluminium fine powder, the fused magnesite of 180 mesh of granularity is formulated by following per distribution ratios:
Proportion: lightweight calcium hexaluminate 65%, white alundum powder 10%, ultra-fine alumina fine powder 10%, activated alumina fine powder 10%, electric smelting
Magnesia 5%；Wherein Al in ultra-fine alumina fine powder2O3≥99%；Al in activated alumina fine powder2O3≥98%；MgO in fused magnesite
≥96%。
Collet the preparation method comprises the following steps: after mixing by whole raw materials, seal nature ageing mixture 12-18 hours, then exist
The extrusion forming of 1.0T vibration moulding machine vibration；Sample after molding, which enters 220 DEG C of electric thermal desiccator after spontaneously drying 48 hours, to be done
Entrucking after dry 2-3 days was burnt into 1200 DEG C of electric heating shuttle kiln through 8-12 hours.
The physical and chemical index of collet after firing are as follows:
The advantage of the invention is that according to the working environment and operating condition of dephosphorization spray gun, by the fire resisting of traditional integral structure
Material protection layer is changed to be assembled by shifting to an earlier date prefabricated heat-resisting protective cover, supporting plate and the identical fireproof sleeve block of multiple structures, burns
Heat-resisting protective cover, supporting plate and the dedicated prefabricated material of fireproof sleeve block processed, as major ingredient, are improved using artificial synthesized spinel
The alkali resistance slag and FeO of dephosphorization spray gun corrode；Monoclinic zirconia, plate diamond spar, rare earth material and high-purity fused magnesite is added,
Micro-crack is formed in material firing and use, greatly improves toughness of material and heat-resistant knocking stability；It simultaneously can shape in material
At In-suit spinel, cause a small amount of volume expansion, has compensated well for contraction when material at high temperature firing, maintained the volume of material
Stablize；And the introducing of rare earth oxide can be effectively improved the microstructure of material, improve the refractoriness of glass phase, enhance material
Corrosion resistance and wearability.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the invention.
Fig. 2 is the structure chart of fireproof sleeve block in Fig. 1.
Fig. 3 is the structure chart of collet in Fig. 1.
Specific embodiment
More detailed explanation is done to the present invention below by specific embodiment, in order to which those skilled in the art etc. understand
And implementation.
Embodiment 1 prepares dephosphorization spray gun
As shown in Figs. 1-2,5.4 meters of the length of the dephosphorization spray gun, the outer diameter 80cm for the steel pipe 1 that dusts, is sleeved on and dusts outside steel pipe 1
The depth 30cm for the groove (boss) being arranged on fireproof sleeve block 7.
Novel dephosphorization spray gun of the invention steel pipe 1 and is coated on the heat-resisting protective to dust on 1 outer peripheral surface of steel pipe including dusting
Layer, steel pipe front end of dusting symmetrically offers powder injection hole；For the service life for extending dephosphorization spray gun, the present invention is arranged outside powder injection hole
There is heat-resisting protective cover 2, offers through-hole on heat-resisting protective cover 2 corresponding with hole site of dusting, the spray being screwed on powder injection hole
Powder branch pipe 3 extends into through-hole (2cm or so, avoids molten iron from carrying out ablation to it in the meal outlet retraction through-hole for the branch pipe 3 that dusts)；
Location nut 4 is screwed on the steel pipe 1 that dusts in heat-resisting protective cover 2, the heat-resisting protective set of 4 front end of location nut is embedded to be placed with
Supporting plate 5, supporting plate 5 are fixedly connected with (when to guarantee work by three pins 6 and 2 side wall of heat-resisting protective cover of circumferentially equalization setting
Molten iron will not enter in heat-resisting protective cover 2, can smear refractory glue on its periphery when supporting plate 5 assembles and be sealed)；Heat-resisting protective cover
The refractory protection that 2 rear portions are dusted on steel pipe 1 is spliced by the identical fireproof sleeve block 7 of multiple structures, and 7 one end of fireproof sleeve block is set
It is equipped with round boss 7.1, the other end is provided with the groove 7.2 being adapted with round boss 7.1；Spray in fireproof sleeve block 7
Gap package has collet 8 on powder steel pipe 1, can effectively avoid because dust steel pipe and the inconsistent refractory protection coefficient of expansion due to lead
It causes fireproof sleeve block to generate vertical and horizontal and splits fried phenomenon；Press is disposed on the steel pipe 1 that dusts at 7 rear portion of fireproof sleeve block
The holddown spring 9 of fireproof sleeve block 7 and with internal thread clam member 10, dust offered on 1 outer wall of steel pipe it is matched
External screw thread；8 outer sheath attaching of holddown spring has a spring protecting sleeve 11, and when work can protect holddown spring 8.
Embodiment 2 fires heat-resisting protective cover 2, supporting plate 5 and fireproof sleeve block 7 used in embodiment 1
The present invention fires heat-resisting protective cover 2, supporting plate 5 and fireproof sleeve block 7 using dedicated prefabricated material, which is by raw material
Artificial synthesized spinelle, plate diamond spar, high-purity fused magnesite, monoclinic zirconia, rare earth oxide are matched according to following weight parts
It is formulated:
30 parts of artificial synthesized spinel particle material of 3 ~ 5mm, 15 parts of artificial synthesized spinel particle material of 1 ~ 3mm, 0.1 ~ 1mm
20 parts of artificial synthesized spinel particle material, 26 parts of the plate diamond spar powder of 320 mesh, the high-purity fused magnesite powder 5 of 180 purposes
Part, 3 parts of the monoclinic zirconia powder of 320 mesh；200 mesh contain the components such as cerium oxide, lanthana, yttrium oxide, neodymia, europium oxide
1 part of composite rare-earth oxide.
In actual use, it can also be prepared according to following weight parts:
25 parts of artificial synthesized spinel particle material of 3 ~ 5mm, 20 parts of artificial synthesized spinel particle material of 1 ~ 3mm, 0.1 ~ 1mm
15 parts of artificial synthesized spinel particle material, 13 parts of the artificial synthesized spinelle powder of 320 purposes, the plate diamond spar powder of 320 mesh
15 parts, 6 parts of the high-purity fused magnesite powder of 180 purposes, 5 parts of the monoclinic zirconia powder of 320 mesh；The cerium oxide powder 1 of 320 mesh
Part；
Its burning process are as follows: all raw materials are uniformly mixed first, are then pressed into heat-resisting protective cover, supporting plate and fire resisting with mold
Cover the blanks such as block, into electric heating shuttle kiln through 1600 DEG C of high temperature firings, repair shaping after, it is successively assembled in resistance to hot spraying powder
Steel pipe is outer.
Embodiment 3 fires collet 8 used in embodiment 1
8 special precast material of collet of the present invention is by raw material lightweight calcium sulphoaluminate, the white alundum powder of 200 mesh, granularity≤1.0 μm
Ultra-fine alumina fine powder, the activated alumina fine powder of granularity≤5.0 μm, 180 mesh of granularity fused magnesite press following per distribution ratios
It is formulated:
Proportion: lightweight calcium hexaluminate 65%, white alundum powder 10%, ultra-fine alumina fine powder 10%, activated alumina fine powder 10%, electric smelting
Magnesia 5%；For the quality requirement for guaranteeing finished thermal insulation set 8, raw materials used purity will guarantee, used in ultra-fine alumina
Al in fine powder2O3≥99%；Al in activated alumina fine powder2O3≥98%；MgO >=96% in fused magnesite.
Collet the preparation method comprises the following steps: after mixing by whole raw materials, seal nature ageing mixture 12-18 hours, then exist
The extrusion forming of 1.0T vibration moulding machine vibration；Sample after molding, which enters 220 DEG C of electric thermal desiccator after spontaneously drying 48 hours, to be done
Entrucking after dry 2-3 days was burnt into 1200 DEG C of electric heating shuttle kiln through 8-12 hours.
Claims (7)
1. a kind of novel dephosphorization spray gun including the steel pipe that dusts (1) and is coated on the heat-resisting guarantor dusted on steel pipe (1) outer peripheral surface
Sheath, the steel pipe front end of dusting symmetrically offer powder injection hole；It is characterized by: being provided with heat-resisting protective cover outside the powder injection hole
(2), through-hole is offered on heat-resisting protective cover (2) corresponding with the hole site of dusting, the spray being screwed on the powder injection hole
Powder branch pipe (3) extends into the through-hole；Location nut has been screwed on the steel pipe that dusts (1) in the heat-resisting protective cover (2)
(4), the heat-resisting protective set of location nut (4) front end is embedded is placed with supporting plate (5), and the supporting plate (5) passes through circumferentially balanced
The pin (6) of setting is fixedly connected with heat-resisting protective cover (2) side wall；It dusts on steel pipe (1) at heat-resisting protective cover (2) rear portion
Refractory protection be spliced by the identical fireproof sleeve block (7) of multiple structures, described fireproof sleeve block (7) one end is provided with circle
Boss (7.1), the other end are provided with the groove (7.2) being adapted with the round boss (7.1)；Positioned at the fireproof sleeve block
(7) gap package has collet (8) on the steel pipe that dusts (1) in；The steel pipe that dusts at fireproof sleeve block (7) rear portion
(1) holddown spring (9) for pressing the fireproof sleeve block (7) is disposed on and with internal thread clam member (10),
Matched external screw thread is offered on the steel pipe that dusts (1) outer wall；Holddown spring (8) the outer sheath attaching has spring shield
It covers (11).
2. dephosphorization spray gun special precast material described in claim 1, it is characterised in that: the special precast material is for firing heat-resisting guarantor
Shield (2), supporting plate (5) and fireproof sleeve block (7)；It is by the artificial synthesized spinelle of raw material, plate diamond spar, high-purity fused magnesite, list
Oblique zirconium oxide, rare earth oxide are formulated according to following weight parts:
66 ~ 73 parts of artificial synthesized spinelle, 15 ~ 26 parts of plate diamond spar, 5 ~ 6 parts of high-purity fused magnesite, 3 ~ 5 parts of monoclinic zirconia,
1 part of rare earth oxide.
3. dephosphorization spray gun special precast material according to claim 2, it is characterised in that: the artificial synthesized spinel charge
The powder of 320 mesh of particulate material and partial size including 0.1 ~ 1mm of partial size, 1 ~ 3mm and 3 ~ 5mm；The rare earth oxide is cerium oxide
Or including cerium oxide, lanthana, yttrium oxide, neodymia, europium oxide component composite rare-earth oxide.
4. dephosphorization spray gun special precast material according to claim 2, it is characterised in that: the plate diamond spar is partial size 320
Purpose powder；High-purity fused magnesite is the powder of 180 mesh of granularity；The monoclinic zirconia is the powder of 320 ~ 325 mesh of partial size
Material；The rare earth oxide is the powder of 200 ~ 320 mesh of granularity.
5. dephosphorization spray gun special precast material according to claim 2, it is characterised in that: the weight of the raw material
Are as follows: 30 parts of artificial synthesized spinel particle material of 3 ~ 5mm, 15 parts of artificial synthesized spinel particle material of 1 ~ 3mm, 0.1 ~ 1mm
20 parts of artificial synthesized spinel particle material, 26 parts of the plate diamond spar powder of 320 mesh, the high-purity fused magnesite powder 5 of 180 purposes
Part, 3 parts of the monoclinic zirconia powder of 320 mesh；200 1 part of mesh composite rare-earth oxides.
6. dephosphorization spray gun special precast material according to claim 2, it is characterised in that: the weight of the raw material
Are as follows: 25 parts of artificial synthesized spinel particle material of 3 ~ 5mm, 20 parts of artificial synthesized spinel particle material of 1 ~ 3mm, 0.1 ~ 1mm
15 parts of artificial synthesized spinel particle material, 13 parts of the artificial synthesized spinelle powder of 320 purposes, the plate diamond spar powder of 320 mesh
15 parts, 6 parts of the high-purity fused magnesite powder of 180 purposes, 5 parts of the monoclinic zirconia powder of 320 mesh；The cerium oxide powder 1 of 320 mesh
Part.
7. collet special precast material described in claim 1, it is characterised in that: be white by raw material lightweight calcium hexaluminate, 200 purposes
The electric-melting magnesium of schmigel, 1.0 μm of granularity of ultra-fine alumina fine powder, 5.0 μm of granularity of activated alumina fine powder, 180 mesh of granularity
Sand is formulated by following per distribution ratios:
Proportion: lightweight calcium hexaluminate 65%, white alundum powder 10%, ultra-fine alumina fine powder 10%, activated alumina fine powder 10%, electric smelting
Magnesia 5%；Wherein Al in ultra-fine alumina fine powder2O3≥99%；Al in activated alumina fine powder2O3≥98%；MgO in fused magnesite
≥96%。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811092038.0A CN109055666A (en) | 2018-09-19 | 2018-09-19 | A kind of dephosphorization spray gun and its special precast material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811092038.0A CN109055666A (en) | 2018-09-19 | 2018-09-19 | A kind of dephosphorization spray gun and its special precast material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109055666A true CN109055666A (en) | 2018-12-21 |
Family
ID=64762175
Family Applications (1)
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|---|---|---|---|
| CN201811092038.0A Withdrawn CN109055666A (en) | 2018-09-19 | 2018-09-19 | A kind of dephosphorization spray gun and its special precast material |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11209813A (en) * | 1998-01-26 | 1999-08-03 | Kawasaki Steel Corp | Lance for injecting powdery material and method of its use |
| CN2652511Y (en) * | 2003-11-06 | 2004-11-03 | 武汉钢铁(集团)公司 | Spray gun for melten iron pretreatment |
| CN101948300A (en) * | 2010-08-26 | 2011-01-19 | 武汉科技大学 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
| CN103352098A (en) * | 2013-07-29 | 2013-10-16 | 莱芜钢铁集团泰东实业有限公司 | Desulfuration spray gun |
| CN104016696A (en) * | 2014-06-19 | 2014-09-03 | 张婷 | Refractory castable for 300-ton ladle |
| CN106866117A (en) * | 2017-02-20 | 2017-06-20 | 孙光 | One kind does not burn modified high-purity magnesium-aluminum spinel composite brick and preparation method |
-
2018
- 2018-09-19 CN CN201811092038.0A patent/CN109055666A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11209813A (en) * | 1998-01-26 | 1999-08-03 | Kawasaki Steel Corp | Lance for injecting powdery material and method of its use |
| CN2652511Y (en) * | 2003-11-06 | 2004-11-03 | 武汉钢铁(集团)公司 | Spray gun for melten iron pretreatment |
| CN101948300A (en) * | 2010-08-26 | 2011-01-19 | 武汉科技大学 | Corundum-spinel lightweight heat-insulating material and preparation method thereof |
| CN103352098A (en) * | 2013-07-29 | 2013-10-16 | 莱芜钢铁集团泰东实业有限公司 | Desulfuration spray gun |
| CN104016696A (en) * | 2014-06-19 | 2014-09-03 | 张婷 | Refractory castable for 300-ton ladle |
| CN106866117A (en) * | 2017-02-20 | 2017-06-20 | 孙光 | One kind does not burn modified high-purity magnesium-aluminum spinel composite brick and preparation method |
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