CN108129136A - Copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof - Google Patents

Copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof Download PDF

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CN108129136A
CN108129136A CN201810008918.9A CN201810008918A CN108129136A CN 108129136 A CN108129136 A CN 108129136A CN 201810008918 A CN201810008918 A CN 201810008918A CN 108129136 A CN108129136 A CN 108129136A
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forsterite
fine powder
magnesia
carbon composite
copper converter
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CN108129136B (en
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徐义彪
李亚伟
桑绍柏
王庆虎
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Wuhan University of Science and Engineering WUSE
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Abstract

The present invention relates to a kind of copper converter lower part magnesia forsterite carbon composites and preparation method thereof.Its technical solution is：First with the fused magnesite particle of 35~55wt%, the forsterite particle of 10~30wt%, the caustic-calcined magnesite fine powder of 6~16wt%, the pyrophillite fine powder of 5~15wt%, the amorphous graphite micro mist of 3~7wt%, 3~7wt% Si2N2O/SiC/TiC/TiCN/C composite granules, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be raw material, the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt% again, it stirs evenly, molding, it is dry；2~8h is kept the temperature under conditions of carbon atmosphere and 1200~1400 DEG C is buried to get copper converter lower part magnesia forsterite carbon composite.The made product of the present invention has the characteristics that environmental-friendly, microporosity is high, thermal shock resistance is good and anti-ice copper slag penetration erosion performance is excellent.

Description

Copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof
Technical field
The invention belongs to copper converter carbon containing refractory fields.It is aoxidized more particularly to a kind of copper converter lower part Magnesium-forsterite-carbon composite and preparation method thereof.
Background technology
Copper converter is important smelting equipment during the blowing refinement of the matte.In converting process, drum in the matte into converter Enter air, FeS is preferentially oxidized to FeO and enters slag with additional quartz reaction；Subsequent Cu2S is obtained by aoxidizing desulfuration More than 98% content is known a little about.
At present, copper converter inner lining material generally uses magnesite-chrome brick, although solubility of the brick in slag is relatively low, magnesium Chrome brick is difficult to be sintered, and structure is more loose, and apparent porosity is high and aperture is larger.In copper converter lower part, inner lining material is direct and oozes The very strong matte contact of permeability；And since partial pressure of oxygen is relatively low, ferro element is mainly very strong with permeability and aggressivity in slag FeO forms exist.Long-time service process finds that matte and slag can be penetrated into along the stomata of copper converter lower part magnesite-chrome brick It inside brick body, and reacts with material component, changes the prototype structure of refractory material, form metamorphic layer.Due to metamorphic layer Structure and performance differ greatly with former brick layer, part refractory material is caused to be detached with brick body, peeling is formed, causes copper converter It is seriously damaged with magnesite-chrome brick lower part.
In addition, there may be the six of very strong carcinogenesis for the chromium ion during being stacked after using and using in magnesite-chrome brick Valency chromium certainly will largely be would seriously pollute the environment using magnesite-chrome brick, threaten the health of humans and animals.
Invention content
The present invention is directed to overcome prior art defect, it is therefore an objective to which offer one kind is environmental-friendly, microporosity is high, thermal shock resistance Good and excellent anti-ice copper-slag penetration erosion performance copper converter lower part magnesia-forsterite-carbon composite and its Preparation method.
To achieve the above object, the technical solution adopted in the present invention is：First with the fused magnesite particle of 35~55wt%, The forsterite particle of 10~30wt%, the caustic-calcined magnesite fine powder of 6~16wt%, the pyrophillite fine powder of 5~15wt%, 3~ The amorphous graphite micro mist of 7wt%, the Si of 3~7wt%2N2O/SiC/TiC/TiCN/C composite granules, the elemental silicon of 1~3wt% are thin The manganese monoxide fine powder of powder, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% is raw material, then the additional raw material 2~ The zirconia sol of 5wt% and the cobalt improved phenolic resin of 3~5wt%, stir evenly, and are molded, dry.Then carbon atmosphere is being buried With 1200~1400 DEG C under conditions of heat preservation 2~8h to get copper converter lower part magnesia-forsterite-carbon composite.
The SiO of the pyrophillite fine powder275 μm of content ﹥ 70wt%, grain size ﹤.
5 μm of C content the ﹥ 80wt%, grain size ﹤ of the amorphous graphite micro mist.
The Si2N2The preparation method of O/SiC/TiC/TiCN/C composite granules is：By pyrophillite fine powder, titanium oxide fine powder With coke fines (3~5) in mass ratio: mix to get mixture at 1: 1；The phenolic aldehyde of 8~10wt% is added in the mixture Spheric granules is made with comminutor in resin；The spheric granules is put into saggar, then the saggar is placed in electric furnace, stove Interior maintenance nitrogen atmosphere, atmosphere pressures are 0.01~0.03MPa, and temperature is 1350~1550 DEG C, keeps the temperature 2~4h, natural cooling To room temperature；It is broken, granularity is finely ground to less than 0.075mm to get Si2N2O/SiC/TiC/TiCN/C composite granules.
The content of MgO ﹥ 97wt% of the fused magnesite particle, grain size are 0.1~5mm.
The content of MgO ﹥ 45wt% of the forsterite particle, grain size are 0.1~3mm.
45 μm of content of MgO the ﹥ 97wt%, grain size ﹤ of the caustic-calcined magnesite fine powder.
45 μm of Si contents the ﹥ 97wt%, grain size ﹤ of the simple substance silica fine powder.
The Ti of the titanium aluminum carbide fine powder3AlC245 μm of content ﹥ 97wt%, grain size ﹤.
45 μm of MnO contents the ﹥ 97wt%, grain size ﹤ of the manganese monoxide fine powder.
The ZrO of the zirconia sol2Content is 20~40wt%, and grain size is 20~70nm.
The Co contents of the cobalt improved phenolic resin are 0.08~0.6wt%, carbon yield ﹥ 40wt%.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art：
Copper converter lower part prepared by the present invention is Trend of Chrome-free material with magnesia-forsterite-carbon composite, will not Environment is polluted, potential threat will not be caused to the health of humans and animals, it is environmental-friendly.
In sintering process of the present invention, pyrophillite fine powder decompose generation silica and aluminium oxide active it is very high, can compared with Reacting generation forsterite and spinelle, manganese monoxide with the caustic-calcined magnesite fine powder added in material under low temperature can be dissolved into In magnesia, forsterite and spinel crystal lattice, promote mass transfer and densifying materials.It buries under carbon atmosphere, cobalt improved phenolic aldehyde tree Lysisin situ is generated carbon nanotube by fat, and elemental silicon, nitrogen and carbon monoxide interaction can generate silicon carbide whisker and nitrogen Silica whisker.The carbon nanotube of above-mentioned reaction generation and different types of whisker are distributed in material matrix, can effectively be blocked Material internal stomata reduces the apparent porosity and aperture size of material, significantly improves copper converter lower part magnesia-magnesium olive Anti-ice copper-slag penetration performance of olive stone-carbon composite.
Copper converter lower part prepared by the present invention manganese monoxide added in magnesia-forsterite-carbon composite It is solid-solution in magnesia, forsterite lattice, is conducive to improve the chemical stability of magnesia and forsterite in slag.It corroded Cheng Zhong, the titanium aluminum carbide added in material are aoxidized, and fine and close metatitanic acid aluminium layer, and the titanium formed will be formed in situ in material surface Sour aluminium layer and the spinelle of generation can absorb the FeO in slag, increase the viscosity of slag, significantly improve copper converter The slag-resistant permeance property of lower part magnesia-forsterite-carbon composite.
Copper converter lower part prepared by the present invention silicon carbide whisker generated in magnesia-forsterite-carbon composite Must and solubility of the silicon oxynitride whisker in slag it is very low, and it is non-oxide to dissolve these high-melting-points in erosion process in slag Viscosity can greatly improve after object, effectively slow down slag and the infiltration of material is corroded.The amorphous graphite that is added in material and Si2N2O/SiC/TiC/TiCN/C composite granules can effectively improve the contact angle between material and matte-slag, make material not by Matte-slag wetting significantly improves anti-ice copper-slag of copper converter lower part magnesia-forsterite-carbon composite Permeate erosion performance.
Copper converter lower part prepared by the present invention is molten with zirconium oxide is introduced in magnesia-forsterite-carbon composite The tiny zirconium oxide of generation can be decomposed in glue heat treatment process to be dispersed in material matrix, improve the thermal shock resistance of material Energy.Carbon nanotube, silicon carbide whisker and the silicon oxynitride whisker of reaction generation are scattered in inside in material, can generate extraction, The energy dissipation mechanisms such as crack deflection and bridging play increasing to copper converter lower part with magnesia-forsterite-carbon composite Strong toughening effect.
The apparent porosity of copper converter lower part magnesia-forsterite-carbon composite prepared by the present invention for 7~ 13%, average pore size is 0.5~3.0 μm, thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 86~ 96%, 10000~12000h is corroded in the infiltration that can effectively keep out matte-slag.
Therefore, the magnesia-forsterite-carbon composite of the copper converter lower part prepared by the present invention has environment friend Well, the characteristics of microporosity is high, thermal shock resistance is good and anti-ice copper-slag penetration erosion performance is excellent
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection domain：
It is first that the material Unify legislation involved by present embodiment is as follows to avoid repeating, in specific embodiment not It repeats again：
The SiO of the pyrophillite fine powder275 μm of content ﹥ 70wt%, grain size ﹤.
5 μm of C content the ﹥ 80wt%, grain size ﹤ of the amorphous graphite micro mist.
The Si2N2The preparation method of O/SiC/TiC/TiCN/C composite granules is：By pyrophillite fine powder, titanium oxide fine powder With coke fines (3~5) in mass ratio: mix to get mixture at 1: 1；The phenolic aldehyde of 8~10wt% is added in the mixture Spheric granules is made with comminutor in resin；The spheric granules is put into saggar, then the saggar is placed in electric furnace, stove Interior maintenance nitrogen atmosphere, atmosphere pressures are 0.01~0.03MPa, and temperature is 1350~1550 DEG C, keeps the temperature 2~4h, natural cooling To room temperature；It is broken, granularity is finely ground to less than 0.075mm to get Si2N2O/SiC/TiC/TiCN/C composite granules.
The content of MgO ﹥ 97wt% of the fused magnesite particle, grain size are 0.1~5mm.
The content of MgO ﹥ 45wt% of the forsterite particle, grain size are 0.1~3mm.
45 μm of content of MgO the ﹥ 97wt%, grain size ﹤ of the caustic-calcined magnesite fine powder.
45 μm of Si contents the ﹥ 97wt%, grain size ﹤ of the simple substance silica fine powder.
The Ti of the titanium aluminum carbide fine powder3AlC245 μm of content ﹥ 97wt%, grain size ﹤.
45 μm of MnO contents the ﹥ 97wt%, grain size ﹤ of the manganese monoxide fine powder.
The ZrO of the zirconia sol2Content is 20~40wt%, and grain size is 20~70nm.
The Co contents of the cobalt improved phenolic resin are 0.08~0.6wt%, carbon yield ﹥ 40wt%.
Embodiment 1
A kind of copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof.It is characterized in that
First with the fused magnesite particle of 35~45wt%, the forsterite particle of 20~30wt%, 6~10wt% it is light-burned Magnesia powder, the pyrophillite fine powder of 11~15wt%, the amorphous graphite micro mist of 3~5wt%, 5~7wt% Si2N2O/SiC/ TiC/TiCN/C composite granules, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% one Manganese oxide fine powder is raw material, then the cobalt improved phenolic aldehyde tree of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt% Fat stirs evenly, and is molded, dry.Then 2~5h is kept the temperature under conditions of carbon atmosphere and 1200~1250 DEG C is buried to get copper metallurgy Converter lower part magnesia-forsterite-carbon composite.
Copper converter lower part magnesia-forsterite-carbon composite prepared by the present embodiment 1：Apparent porosity is 7 ~10%；Average pore size is 0.5~1.5 μm；Thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 86~ 90%；10000~11500h is corroded in the infiltration that slag can effectively be kept out.
Embodiment 2
A kind of copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof.It is characterized in that first With the fused magnesite particle of 38~48wt%, the forsterite particle of 17~27wt%, the caustic-calcined magnesite fine powder of 8~12wt%, 9 The pyrophillite fine powder of~13wt%, the amorphous graphite micro mist of 4~6wt%, 4~6wt% Si2N2O/SiC/TiC/TiCN/C is answered Close powder, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be Raw material, then the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt%, stir evenly, into Type, it is dry.Then 3~6h is kept the temperature under conditions of carbon atmosphere and 1240~1290 DEG C is buried to aoxidize to get copper converter lower part Magnesium-forsterite-carbon composite.
Copper converter lower part magnesia-forsterite-carbon composite prepared by the present embodiment 2：Apparent porosity is 8 ~11%；Average pore size is 1.1~2.1 μm；Thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 88~ 92%；11400~11900h is corroded in the infiltration that slag can effectively be kept out.
Embodiment 3：
A kind of copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof.It is characterized in that first With the fused magnesite particle of 41~51wt%, the forsterite particle of 14~24wt%, 10~14wt% caustic-calcined magnesite fine powder, The pyrophillite fine powder of 7~11wt%, the amorphous graphite micro mist of 5~7wt%, 3~5wt% Si2N2O/SiC/TiC/TiCN/C is answered Close powder, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be Raw material, then the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt%, stir evenly, into Type, it is dry.Then 4~7h is kept the temperature under conditions of carbon atmosphere and 1280~1330 DEG C is buried to aoxidize to get copper converter lower part Magnesium-forsterite-carbon composite.
Copper converter lower part magnesia-forsterite-carbon composite prepared by the present embodiment 3：Apparent porosity is 9 ~12%；Average pore size is 1.7~2.7 μm；Thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 90~ 94%；11500~12000h is corroded in the infiltration that slag can effectively be kept out.
Embodiment 4
A kind of copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof.It is characterized in that first With the fused magnesite particle of 44~54wt%, the forsterite particle of 11~21wt%, 12~16wt% caustic-calcined magnesite fine powder, The pyrophillite fine powder of 5~9wt%, the amorphous graphite micro mist of 3~5wt%, 5~7wt% Si2N2O/SiC/TiC/TiCN/C is answered Close powder, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be Raw material, then the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt%, stir evenly, into Type, it is dry.Then 5~8h is kept the temperature under conditions of carbon atmosphere and 1320~1370 DEG C is buried to aoxidize to get copper converter lower part Magnesium-forsterite-carbon composite.
Copper converter lower part magnesia-forsterite-carbon composite prepared by the present embodiment 4：Apparent porosity is 10~13%；Average pore size is 2.0~3.0 μm；Thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 92~ 96%；11300~11800h is corroded in the infiltration that slag can effectively be kept out.
Embodiment 5
A kind of copper converter lower part magnesia-forsterite-carbon composite and preparation method thereof.It is characterized in that first With the fused magnesite particle of 45~55wt%, the forsterite particle of 10~20wt%, the caustic-calcined magnesite fine powder of 9~13wt%, 8 The pyrophillite fine powder of~12wt%, the amorphous graphite micro mist of 4~6wt%, 4~6wt% Si2N2O/SiC/TiC/TiCN/C is answered Close powder, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be Raw material, then the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt%, stir evenly, into Type, it is dry.Then 4~7h is kept the temperature under conditions of carbon atmosphere and 1350~1400 DEG C is buried to aoxidize to get copper converter lower part Magnesium-forsterite-carbon composite.
Copper converter lower part magnesia-forsterite-carbon composite prepared by the present embodiment 5：Apparent porosity is 8 ~11%；Average pore size is 1.3~2.3 μm；Thermal shock resistance at 1100 DEG C 5 residual strength conservation rates of water cooling for 90~ 94%；11200~11700h is corroded in the infiltration that slag can effectively be kept out.
Present embodiment has following good effect compared with prior art：
Copper converter lower part prepared by present embodiment is Trend of Chrome-free with magnesia-forsterite-carbon composite Material does not pollute the environment, and potential threat will not be caused to the health of humans and animals, environmental-friendly.
In present embodiment sintering process, pyrophillite fine powder decomposes the silica generated and aluminium oxide active is very high, Generation forsterite can be reacted with the caustic-calcined magnesite fine powder added in material at a lower temperature and spinelle, manganese monoxide can To be dissolved into magnesia, forsterite and spinel crystal lattice, promote mass transfer and densifying materials.It buries under carbon atmosphere, cobalt changes Property phenolic resin lysisin situ is generated into carbon nanotube, elemental silicon, nitrogen and carbon monoxide interaction can generate silicon carbide Whisker and silicon oxynitride whisker.The carbon nanotube of above-mentioned reaction generation and different types of whisker are distributed in material matrix, energy Effective plugging material internal porosity, reduces the apparent porosity and aperture size of material, significantly improves copper converter lower part oxygen Change anti-ice copper-slag penetration performance of magnesium-forsterite-carbon composite.
Copper converter lower part prepared by present embodiment is with adding in magnesia-forsterite-carbon composite Manganese monoxide is solid-solution in magnesia, forsterite lattice, is conducive to improve the chemical stabilization of magnesia and forsterite in slag Property.In erosion process, the titanium aluminum carbide added in material is aoxidized, and fine and close metatitanic acid aluminium layer will be formed in situ in material surface, And the metatitanic acid aluminium layer and the spinelle of generation formed can absorb the FeO in slag, increase the viscosity of slag, significantly improve Slag-resistant permeance property of the copper converter lower part with magnesia-forsterite-carbon composite.
Copper converter lower part prepared by present embodiment is with generating in magnesia-forsterite-carbon composite The solubility of silicon carbide whisker and silicon oxynitride whisker in slag is very low, and dissolves these Gao Rong in erosion process in slag Viscosity can greatly improve after point non-oxidized substance, effectively slow down slag and the infiltration of material is corroded.The earthy stone added in material Ink and Si2N2O/SiC/TiC/TiCN/C composite granules can effectively improve the contact angle between material and matte-slag, make material Do not soaked by matte-slag, significantly improve the anti-ice copper of copper converter lower part magnesia-forsterite-carbon composite- Slag penetration erosion performance.
Copper converter lower part prepared by present embodiment is introduced in magnesia-forsterite-carbon composite The tiny zirconium oxide of generation can be decomposed in zirconia sol heat treatment process to be dispersed in material matrix, improve material Thermal shock resistance.Carbon nanotube, silicon carbide whisker and the silicon oxynitride whisker of reaction generation are scattered in inside in material, can produce The energy dissipation mechanisms such as raw extraction, crack deflection and bridging, to copper converter lower part magnesia-forsterite-carbon composite wood Material plays the role of activeness and quietness.
Copper converter lower part magnesia-forsterite-carbon composite prepared by present embodiment：Apparent pore Rate is 7~13%；Average pore size is 0.5~3.0 μm；Thermal shock resistance 5 residual strength conservation rates of water cooling at 1100 DEG C are 86~96%；10000~12000h is corroded in the infiltration that matte-slag can effectively be kept out.
Therefore, the copper converter lower part prepared by present embodiment has with magnesia-forsterite-carbon composite There is the characteristics of environmental-friendly, microporosity is high, thermal shock resistance is good and anti-ice copper-slag penetration erosion performance is excellent.

Claims (10)

1. a kind of copper converter lower part preparation method of magnesia-forsterite-carbon composite, it is characterised in that first with 35 The fused magnesite particle of~55wt%, the forsterite particle of 10~30wt%, the caustic-calcined magnesite fine powder of 6~16wt%, 5~ The pyrophillite fine powder of 15wt%, the amorphous graphite micro mist of 3~7wt%, 3~7wt% Si2N2O/SiC/TiC/TiCN/C is compound Powder, the simple substance silica fine powder of 1~3wt%, the titanium aluminum carbide fine powder of 2~5wt% and 2~5wt% manganese monoxide fine powder be original Material, then the cobalt improved phenolic resin of the zirconia sol of the additional 2~5wt% of raw material and 3~5wt%, stir evenly, into Type, it is dry；Then 2~8h is kept the temperature under conditions of carbon atmosphere and 1200~1400 DEG C is buried to aoxidize to get copper converter lower part Magnesium-forsterite-carbon composite；
The SiO of the pyrophillite fine powder275 μm of content ﹥ 70wt%, grain size ﹤；
5 μm of C content the ﹥ 80wt%, grain size ﹤ of the amorphous graphite micro mist；
The Si2N2The preparation method of O/SiC/TiC/TiCN/C composite granules is：By pyrophillite fine powder, titanium oxide fine powder and coke Charcoal fine powder (3~5) in mass ratio: 1: 1 mixing is to get mixture；The phenolic aldehyde tree of 8~10wt% is added in the mixture Spheric granules is made with comminutor in fat；The spheric granules is put into saggar, then the saggar is placed in electric furnace, in stove Nitrogen atmosphere is maintained, atmosphere pressures are 0.01~0.03MPa, and temperature is 1350~1550 DEG C, keeps the temperature 2~4h, naturally cools to Room temperature；It is broken, granularity is finely ground to less than 0.075mm to get Si2N2O/SiC/TiC/TiCN/C composite granules.
2. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that the content of MgO ﹥ 97wt% of the fused magnesite particle, grain size is 0.1~5mm.
3. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that the content of MgO ﹥ 45wt% of the forsterite particle, grain size is 0.1~3mm.
4. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that 45 μm of content of MgO the ﹥ 97wt%, grain size ﹤ of the caustic-calcined magnesite fine powder.
5. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that 45 μm of Si contents the ﹥ 97wt%, grain size ﹤ of the simple substance silica fine powder.
6. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that the Ti of the titanium aluminum carbide fine powder3AlC245 μm of content ﹥ 97wt%, grain size ﹤.
7. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that 45 μm of MnO contents the ﹥ 97wt%, grain size ﹤ of the manganese monoxide fine powder.
8. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that the ZrO of the zirconia sol2Content is 20~40wt%, and grain size is 20~70nm.
9. the copper converter lower part according to claim 1 preparation method of magnesia-forsterite-carbon composite, It is characterized in that the Co contents of the cobalt improved phenolic resin are 0.08~0.6wt%, carbon yield ﹥ 40wt%.
10. a kind of copper converter lower part magnesia-forsterite-carbon composite, it is characterised in that under the copper converter Portion is according to the copper converter lower part described in any one of claim 1~9 with magnesia-forsterite-carbon composite With the magnesia-forsterite of the copper converter lower part prepared by the preparation method of magnesia-forsterite-carbon composite- Carbon composite.
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