CN108863408A - A kind of preparation method of ZrN-SiAlON-SiC-C multiple phase refractory material - Google Patents

A kind of preparation method of ZrN-SiAlON-SiC-C multiple phase refractory material Download PDF

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CN108863408A
CN108863408A CN201710328874.3A CN201710328874A CN108863408A CN 108863408 A CN108863408 A CN 108863408A CN 201710328874 A CN201710328874 A CN 201710328874A CN 108863408 A CN108863408 A CN 108863408A
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sialon
zrn
sic
refractory material
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吴小文
张之介
程伯豪
尹兆钰
黄朝晖
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China University of Geosciences Beijing
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Abstract

The present invention relates to a kind of preparation methods of ZrN-SiAlON-SiC-C refractory material, belong to fire resisting material field.The present invention prepares ZrN-SiAlON fire resisting powder using bauxite and zircon as raw material, then using sucrose solution as bonding agent, and in conjunction with 120 mesh SiC and 325 mesh SiC, material forming prepares ZrN-SiAlON-SiC-C refractory material through 1500 DEG C of heat treatments.When ZrN-SiAlON fire resisting powder, 120 mesh SiC and 325 mesh SiC mass ratioes are 2:4:4, the flexural strength of refractory material is 3.53MPa, apparent porosity 41.10%, bulk density 1.76g/cm3.When mass ratio is 3:3.5:3.5, the flexural strength of refractory material is 4.32MPa, apparent porosity 45.79%, bulk density 1.57g/cm3.When mass ratio is 4:2:2, the flexural strength of refractory material is 4.39MPa, apparent porosity 53.23%, bulk density 1.36g/cm3.When mass ratio is 4:2:2, the flexural strength of refractory material is 4.25MPa, apparent porosity 50.61%, bulk density 1.41g/cm3.Preparation process according to the present invention will be a cost effective approach of effective high-tech of preparation high-performance ZrN-SiAlON-SiC-C fire resistive material product.

Description

A kind of preparation method of ZrN-SiAlON-SiC-C multiple phase refractory material
Technical field:
The present invention relates to a kind of preparation methods of ZrN-SiAlON-SiC-C multiple phase refractory material, belong to refractory material neck Domain.
Background technique:
In the entire material system of refractory material, other than oxide-based refractory material, carbon containing refractory is with steel The high-performance Non oxide refractories that iron smelting technique progress is got up are the important composition portions in refractory material classification Point, the yield and reduction that good resistance to slag corrosion and thermal shock resistance can be significantly increased metallurgical furnace life, increase steel Refractory material unit consumption, economic benefit and social benefit are significant.Exploitation novel low carbon non-oxidized substance multiple phase refractory material has become generation The generally acknowledged important development direction of boundary colleague.The raw materials used nitride or carbon for Si system and Al system of non-oxidized substance multiple phase refractory material Compound, research shows that Non oxide refractories have to the permeability resistance and anti-erosion of high-temperature slag and metal bath preferably, The advantage that linear expansion coefficient is low, thermal conductivity and heat-resistant knocking stability are good.Its research system is from Si3N4- SiC, SiAlON-SiC development To SiAlON/Si3N4-Al2O3/ Spinel and SiAlON/Si3N4-Al2O3/ Spinel-SiC and containing AlN, AlON, MgAlON, The systems such as TiNC and corresponding composite diphase material, it is primarily used for blast furnace ontology, cast house and molten iron accumulating tank, clean steel The positions such as ladle, continuous casting are smelted, are played an important role for the safety in production and technological progress of metallurgical industry.
But high cost of material and twice firing high energy consumption cost restrict answering extensively for non-oxidized substance complex phase high-temperature resistant material With.In recent years, with aluminium silicon systems mineral and it is some be rich in Al2O3The Industrial Solid Waste of component and MgO component is raw material, also by carbon heat The research that the preparation processes such as original nitridation obtain inexpensive nitride composite fire powder material has become hot spot.Turn in silicate mineral Type has more experimental study work report in terms of preparing oxide-non-oxidized substance multiple phase refractory material powder, especially containing SiO2And Al2O3The aluminium silicate mineral of component prepares grinding for SiAlON or SiAlON composite diphase material through carbothermal reduction-nitridation technique Study carefully aspect and has been achieved with more research achievement.However, containing ZrO with more excellent performance2, the complex phase high-temperature resistants such as ZrN, ZrC It is expensive for material, is applied only to thermal extremes harshness use condition such as space flight and aviation, hot industry critical component etc..? ZrO only is used in the site portions such as slide hole and sizing nozzle in refractory material2Material, related ZrN, ZrC etc. are in high-performance Application in Refractory not yet finds more report, and the mainly difficult reason of price height and preparation is difficult to expanded application.
In addition, the non-oxidized substances such as ZrN, SiAlON object mutually needs just be prepared under the conditions of very high temperature and protective atmosphere To corresponding high temperature resistant product, it is difficult to which (being usually no more than 1780 DEG C) is sintered under the conditions of usual refractory industry high temperature sintering At the block refractory material with high intensity.Therefore, it is difficult to be utilized using the technique of the super high sintering temperature of traditional refractory material ZrN, SiAlON complex phase non-oxidized substance refractory raw material prepare high-performance heat-resisting material product, will also cause high energy consumption and it is high at This.
The present inventor proposes to prepare ZrN-SiAlON by carbothermal reduction-nitridation using zircon and middle-low grade bauxite Complex phase non-oxidized substance refractory raw material has the advantage of high-performance and low-cost.It is again combination by aggregate and sucrose solution of SiC particulate Agent forms carbon combination at high temperature using sucrose to obtain ZrN-SiAlON-SiC-C complex phase fire material.The preparation process It will be a cost effective way of effective high-tech of preparation high-performance ZrN-SiAlON-SiC-C multiple phase refractory material product Diameter.
Summary of the invention
The purpose of the present invention is reaching preparation ZrN-SiAlON-SiC-C multiple phase refractory material by following measure, specifically Technical solution is as follows:
The bauxite of 200 mesh is selected (to come from Yangquan Shanxi, primary chemical group becomes Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) and the zircon of 200 mesh (primary chemical group becomes ZrO2, 69.11%;SiO2, 21.17%;HfO2, 3.00%;TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) conduct Raw material, coke (purchase is 200 mesh in Chinese new era Co., Ltd, carbon content 83.72wt.%, partial size) are used as reducing agent, It is matched according to certain mass and carries out mixing, pass through dry ball milling mixed raw material and cross 200 meshes, powder is then put into corundum earthenware It is placed in vacuum atmosphere oven in crucible, is passed through nitrogen, flow is 0.3~0.5L/min, is nitrogenized in target temperature heat preservation 4h Synthesize ZrN-SiAlON fire resisting powder.The ZrN-SiAlON fire resisting powder for weighing synthesis, 120 mesh SiC and 325 by a certain percentage Mesh SiC, ZrN-SiAlON and SiC powder are poured into stirring pool, start blender, until ZrN-SiAlON and SiC is uniformly mixed; Prepared bonding agent sucrose solution is poured into uniformly mixed granule materials, start again blender stir 2h to powder, Bonding agent is uniformly mixed.The material being uniformly mixed is poured into pallet, mixing is then packed into 6mm × 6mm × 45mm and is tried In original mold tool, is formed in 5MPa pressure maintaining 30s, sample after molding is put into cold isostatic press, in 150MPa pressure maintaining 90s.Finally Molding bar-shaped sample is put into drying in baking oven, specific drying temperature and time are set, molding sample is placed on specific Heat treatment 3h is carried out under the conditions of temperature buried charcoal.ZrN-SiAlON-SiC-C multiple phase refractory material can be obtained.
The bauxite, zircon, coke are 7 according to certain mass proportion:3:2.42.
The target temperature that the heat preservation 4h carries out Nitration synthesis ZrN-SiAlON fire resisting powder is 1600 DEG C.
The sucrose solution is that analyze pure sucrose and the mass ratio of water be 2:1 solution.
The specific drying temperature of the setting and time are 90 DEG C × 3h-, 120 DEG C × 3h-, 150 DEG C × 8h.
The specific temperature for carrying out being heat-treated 3h under the conditions of buried charcoal that molding sample is placed on is 1500 DEG C.
The invention has the advantages that prepared refractory material has many advantages, such as low cost, low energy consumption, high-performance.
Detailed description of the invention
Fig. 1 is the XRD spectrum of ZrN-SiAlON fire resisting powder.
Fig. 2 is the ZrN-SiAlON-SiC-C multiple phase refractory material that ZrN-SiAlON fire resisting powder additional amount is 20% SEM photograph.
Fig. 3 is the ZrN-SiAlON-SiC-C multiple phase refractory material that ZrN-SiAlON fire resisting powder additional amount is 30% SEM photograph.
Fig. 4 is the ZrN-SiAlON-SiC-C multiple phase refractory material that ZrN-SiAlON fire resisting powder additional amount is 40% SEM photograph.
Fig. 5 is the ZrN-SiAlON-SiC-C multiple phase refractory material that ZrN-SiAlON fire resisting powder additional amount is 50% SEM photograph.
Fig. 6 is ZrN-SiAlON-SiC-C multiple phase refractory material flexural strength.
Fig. 7 is ZrN-SiAlON-SiC-C multiple phase refractory material apparent porosity.
Fig. 8 is ZrN-SiAlON-SiC-C multiple phase refractory material bulk density.
Specific embodiment:
Below the example technical solution that the present invention is further explained is embodied, but it is not intended to be limited to following implementations Case.
Embodiment 1
The bauxite of 200 mesh is selected (to come from Yangquan Shanxi, primary chemical group becomes Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) and the zircon of 200 mesh (primary chemical group becomes ZrO2, 69.11%;SiO2, 21.17%;HfO2, 3.00%;TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) conduct Raw material, coke (purchase is 200 mesh in Chinese new era Co., Ltd, carbon content 83.72wt.%, partial size) are used as reducing agent, According to mass ratio 7:3:2.42 carry out mixing, pass through dry ball milling mixed raw material and cross 200 meshes, powder is then put into corundum It is placed in vacuum atmosphere oven in crucible, is passed through nitrogen, flow is 0.3~0.5L/min, is nitrogenized in 1600 DEG C of heat preservation 4h Synthesize ZrN-SiAlON fire resisting powder.In mass ratio 2:4:4 weigh synthesis ZrN-SiAlON fire resisting powder, 120 mesh SiC and 325 mesh SiC, ZrN-SiAlON and SiC powder are poured into stirring pool, blender is started, until ZrN-SiAlON and SiC mixing is equal It is even;Prepared bonding agent sucrose solution is poured into uniformly mixed granule materials, blender is started again and stirs 2h to powder Body, bonding agent are uniformly mixed.The material being uniformly mixed is poured into pallet, mixing is then packed into 6mm × 6mm × 45mm In sample mould, is formed in 5MPa pressure maintaining 30s, sample after molding is put into cold isostatic press, in 150MPa pressure maintaining 90s.Most Molding bar-shaped sample is put into drying in baking oven afterwards, specific drying temperature and time are set, molding sample is placed on spy Determine to carry out heat treatment 3h under the conditions of temperature buried charcoal.ZrN-SiAlON-SiC-C multiple phase refractory material can be obtained.Complex phase fire material The big flexural strength in material ground is 3.53MPa, apparent porosity 41.10%, bulk density 1.76g/cm3
Embodiment 2
The bauxite of 200 mesh is selected (to come from Yangquan Shanxi, primary chemical group becomes Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) and the zircon of 200 mesh (primary chemical group becomes ZrO2, 69.11%;SiO2, 21.17%;HfO2, 3.00%;TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) conduct Raw material, coke (purchase is 200 mesh in Chinese new era Co., Ltd, carbon content 83.72wt.%, partial size) are used as reducing agent, According to mass ratio 7:3:2.42 carry out mixing, pass through dry ball milling mixed raw material and cross 200 meshes, powder is then put into corundum It is placed in vacuum atmosphere oven in crucible, is passed through nitrogen, flow is 0.3~0.5L/min, is nitrogenized in 1600 DEG C of heat preservation 4h Synthesize ZrN-SiAlON fire resisting powder.In mass ratio 3:3.5:3.5 weigh the ZrN-SiAlON fire resisting powder of synthesis, 120 mesh SiC With 325 mesh SiC, ZrN-SiAlON and SiC powder are poured into stirring pool, blender is started, until ZrN-SiAlON and SiC mixing Uniformly;Prepared bonding agent sucrose solution is poured into uniformly mixed granule materials, starts blender stirring 2h again extremely Powder, bonding agent are uniformly mixed.The material being uniformly mixed is poured into pallet, then by mixing be packed into 6mm × 6mm × In 45mm sample mould, is formed in 5MPa pressure maintaining 30s, sample after molding is put into cold isostatic press, in 150MPa pressure maintaining 90s.Molding bar-shaped sample is finally put into drying in baking oven, specific drying temperature and time are set, molding sample is put It sets and carries out heat treatment 3h under the conditions of specific temperature buried charcoal.ZrN-SiAlON-SiC-C multiple phase refractory material can be obtained.Complex phase Refractory material big flexural strength be 4.32MPa, apparent porosity 45.79%, bulk density 1.57g/cm3
Embodiment 3
The bauxite of 200 mesh is selected (to come from Yangquan Shanxi, primary chemical group becomes Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) and the zircon of 200 mesh (primary chemical group becomes ZrO2, 69.11%;SiO2, 21.17%;HfO2, 3.00%;TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) conduct Raw material, coke (purchase is 200 mesh in Chinese new era Co., Ltd, carbon content 83.72wt.%, partial size) are used as reducing agent, According to mass ratio 7:3:2.42 carry out mixing, pass through dry ball milling mixed raw material and cross 200 meshes, powder is then put into corundum It is placed in vacuum atmosphere oven in crucible, is passed through nitrogen, flow is 0.3~0.5L/min, is nitrogenized in 1600 DEG C of heat preservation 4h Synthesize ZrN-SiAlON fire resisting powder.In mass ratio 4:3:3 weigh synthesis ZrN-SiAlON fire resisting powder, 120 mesh SiC and 325 mesh SiC, ZrN-SiAlON and SiC powder are poured into stirring pool, blender is started, until ZrN-SiAlON and SiC mixing is equal It is even;Prepared bonding agent sucrose solution is poured into uniformly mixed granule materials, blender is started again and stirs 2h to powder Body, bonding agent are uniformly mixed.The material being uniformly mixed is poured into pallet, mixing is then packed into 6mm × 6mm × 45mm In sample mould, is formed in 5MPa pressure maintaining 30s, sample after molding is put into cold isostatic press, in 150MPa pressure maintaining 90s.Most Molding bar-shaped sample is put into drying in baking oven afterwards, specific drying temperature and time are set, molding sample is placed on spy Determine to carry out heat treatment 3h under the conditions of temperature buried charcoal.ZrN-SiAlON-SiC-C multiple phase refractory material can be obtained.Complex phase fire material The big flexural strength in material ground is 4.39MPa, apparent porosity 53.23%, bulk density 1.36g/cm3
Embodiment 4
The bauxite of 200 mesh is selected (to come from Yangquan Shanxi, primary chemical group becomes Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) and the zircon of 200 mesh (primary chemical group becomes ZrO2, 69.11%;SiO2, 21.17%;HfO2, 3.00%;TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) conduct Raw material, coke (purchase is 200 mesh in Chinese new era Co., Ltd, carbon content 83.72wt.%, partial size) are used as reducing agent, According to mass ratio 7:3:2.42 carry out mixing, pass through dry ball milling mixed raw material and cross 200 meshes, powder is then put into corundum It is placed in vacuum atmosphere oven in crucible, is passed through nitrogen, flow is 0.3~0.5L/min, is nitrogenized in 1600 DEG C of heat preservation 4h Synthesize ZrN-SiAlON fire resisting powder.In mass ratio 5:2.5:2.5 weigh the ZrN-SiAlON fire resisting powder of synthesis, 120 mesh SiC With 325 mesh SiC, ZrN-SiAlON and SiC powder are poured into stirring pool, blender is started, until ZrN-SiAlON and SiC mixing Uniformly;Prepared bonding agent sucrose solution is poured into uniformly mixed granule materials, starts blender stirring 2h again extremely Powder, bonding agent are uniformly mixed.The material being uniformly mixed is poured into pallet, then by mixing be packed into 6mm × 6mm × In 45mm sample mould, is formed in 5MPa pressure maintaining 30s, sample after molding is put into cold isostatic press, in 150MPa pressure maintaining 90s.Molding bar-shaped sample is finally put into drying in baking oven, specific drying temperature and time are set, molding sample is put It sets and carries out heat treatment 3h under the conditions of specific temperature buried charcoal.ZrN-SiAlON-SiC-C multiple phase refractory material can be obtained.Complex phase Refractory material big flexural strength be 4.25MPa, apparent porosity 50.61%, bulk density 1.41g/cm3

Claims (6)

1. a kind of preparation method of ZrN-SiAlON-SiC-C refractory material, feature selects the bauxite of 200 mesh (to come from Shanxi Yangquan, primary chemical group become Al2O3, 62.70%;SiO2, 23.13%;Fe2O3, 7.38%;TiO2, 5.76%;Other, 3.03%) (primary chemical group becomes ZrO with the zircon of 200 mesh2, 69.11%;SiO2, 21.17%;HfO2, 3.00%; TiO2, 2.13%;Al2O3, 2.06%;Other, 2.53%) it is used as raw material, (purchase is in Chinese new era Co., Ltd, carbon for coke Content is 83.72wt.%, and partial size is 200 mesh) it is used as reducing agent, it is matched according to certain mass and carries out mixing, pass through dry ball milling Mixed raw material simultaneously crosses 200 meshes, and then powder is put into corundum crucible and is placed in vacuum atmosphere oven, nitrogen, flow are passed through For 0.3~0.5L/min, Nitration synthesis ZrN-SiAlON fire resisting powder is carried out in target temperature heat preservation 4h.Title by a certain percentage The ZrN-SiAlON fire resisting powder, 120 mesh SiC and 325 mesh SiC for taking synthesis, pour into stirring pool for ZrN-SiAlON and SiC powder It is interior, blender is started, until ZrN-SiAlON and SiC is uniformly mixed;Prepared bonding agent sucrose solution is poured into uniformly mixed Granule materials in, start again blender stir 2h to powder, bonding agent be uniformly mixed.The material being uniformly mixed is fallen Enter in pallet, then mixing is fitted into 6mm × 6mm × 45mm sample mould, is formed in 5MPa pressure maintaining 30s, it will be after molding Sample is put into cold isostatic press, in 150MPa pressure maintaining 90s.Molding bar-shaped sample is finally put into baking oven to dry, setting spy Determine drying temperature and time, molding sample is placed under the conditions of specific temperature buried charcoal and carries out heat treatment 3h.It can be obtained ZrN-SiAlON-SiC-C refractory material.
2. the unburned method for preparing ZrN-SiAlON-SiC-C refractory material at method described in accordance with the claim 1, feature exist Matching in the bauxite, zircon, coke according to certain mass is 7:3:2.42.
3. the light unburned method for preparing ZrN-SiAlON-SiC-C refractory material at method described in accordance with the claim 1, feature The target temperature for being that the heat preservation 4h carries out Nitration synthesis ZrN-SiAlON fire resisting powder is 1600 DEG C.
4. the unburned method for preparing ZrN-SiAlON-SiC-C refractory material at method described in accordance with the claim 1, feature exist It is that analyze the mass ratio of pure sucrose and water be 2 in the sucrose solution:1 solution.
5. the unburned method for preparing ZrN-SiAlON-SiC-C refractory material at method described in accordance with the claim 1, feature exist It is 90 DEG C × 3h-, 120 DEG C × 3h-, 150 DEG C × 8h in the specific drying temperature of setting and time.
6. the preparation method of ZrN-SiAlON-SiC-C refractory material described in accordance with the claim 1, it is characterised in that described It is 1500 DEG C that molding sample, which is placed on, and carries out the specific temperature of heat treatment 3h under the conditions of buried charcoal.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110627490A (en) * 2019-10-25 2019-12-31 中冶武汉冶金建筑研究院有限公司 Preparation method and application of environment-friendly self-flow aluminum-silicon refractory injection molding material
CN110627490B (en) * 2019-10-25 2022-02-01 中冶武汉冶金建筑研究院有限公司 Preparation method and application of environment-friendly self-flow aluminum-silicon refractory injection molding material
CN112125674A (en) * 2020-09-15 2020-12-25 武汉理工大学 High-strength thermal shock-resistant oxidation-resistant SiC/O' -Sialon composite ceramic and preparation method thereof

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