CN109320217A - A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof - Google Patents
A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof Download PDFInfo
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Abstract
Present invention relates particularly to a kind of intermediate frequency furnace corundum dry type ramming materials and preparation method thereof.Its technical solution is: using the fused magnesite of the electro-corundum particle of 48~68wt%, the plate diamond spar of 20~40wt% and 6~16wt% as raw material, the yttrium oxide micro mist of the additional 0.5~1.5wt% of raw material, the titanium dioxide fine powder of 0.5~1.0wt%, 0.5~2.0wt% ZrOCl2·8H2The oxidation nickel fine powder of O fine powder and 0.5~1.0wt% is uniformly mixed, and intermediate frequency furnace corundum dry type ramming material is made.The corundum dry type ramming material of intermediate frequency furnace prepared by the present invention has the characteristics that refractoriness is high, volume stability is good, elevated temperature strength is big, antistrip performance is good, scour resistance is excellent and erosion-resisting characteristics is good.
Description
Technical field
The invention belongs to intermediate frequency furnace fire resisting material fields.More particularly to a kind of intermediate frequency furnace corundum dry type
Ramming mass and preparation method thereof.
Background technique
With the development of economy, intermediate frequency furnace smelting has become casting, stainless steel smelting and special steel smelting industry
One of main smelting equipment.Intermediate frequency furnace builds the influence intermediate frequency furnace of dry type ramming material used in furnace lining and normally produces
Important materials.In use, the working face of dry type ramming material need to be sintered to be formed with the higher sinter layer of intensity, effectively support
Anti- molten steel is washed away and is corroded；Non-working surface should but keep unsintered bulk structure, and the structure should be thicker, be conducive to absorb
Thermal stress achievees the purpose that the extension for preventing working lining crackle and absorbs crackle.
Currently, intermediate frequency furnace generally makees furnace lining using corundum-magnesia ramming mass.Corundum fusing point height, hot volume
Stability is good and with excellent erosion-resisting characteristics, and generating expansion that spinelle generates using corundum and magnesia reaction can be to prevent
Only working lining caused by shrinking because being cracked.However, in existing corundum-magnesian ramming mass use process working lining sintering strength compared with
It is low, cause its scour resistance and erosion-resisting characteristics lower；And the sinter layer of working face is thicker, non-working surface bulk structure compared with
It is thin, it is unfavorable for the absorption of thermal stress, leads to thermal shock resistance difference and be easy to peel off, cause the quick damage of dry type ramming material.
Summary of the invention
The present invention is directed to overcome prior art defect, it is therefore an objective to provide that a kind of refractoriness is high, volume stability is good, high temperature is strong
Degree is big, antistrip performance is good, scour resistance is excellent and erosion-resisting characteristics good intermediate frequency furnace corundum dry type ramming
Material and preparation method thereof.
To achieve the above object, the technical scheme adopted by the invention is that: with the electro-corundum particle of 48~68wt%, 20
The plate diamond spar of~40wt% and the fused magnesite of 6~16wt% are raw material, the oxidation of the additional 0.5~1.5wt% of raw material
Yttrium micro mist, the titanium dioxide fine powder of 0.5~1.0wt%, 0.5~2.0wt% ZrOCl2·8H2O fine powder and 0.5~1.0wt%
Oxidation nickel fine powder, be uniformly mixed, be made intermediate frequency furnace corundum dry type ramming material.
The granularity of the electro-corundum particle is 0.5~5mm；The Al of the electro-corundum particle2O3Content > 99wt%.
The granularity of the plate diamond spar is 0.045~0.5mm；The Al of the plate diamond spar2O3Content > 99.3wt%.
The granularity of the fused magnesite is 0.075~1mm；The content of MgO > 97wt% of the fused magnesite.
5 μm of the granularity < of the yttrium oxide micro mist；The Y of the yttrium oxide micro mist2O3Content > 98wt%.
75 μm of the granularity < of the titanium dioxide fine powder；The TiO of the titanium dioxide fine powder2Content ﹥ 99wt%.
45 μm of granularity < of the oxidation nickel fine powder；The NiO content ﹥ 99wt% of the oxidation nickel fine powder.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art:
Intermediate frequency furnace prepared by the present invention is with corundum dry type ramming material (hereinafter referred to as " dry type ramming material ") using rigid
Beautiful and magnesia is primary raw material, and the additive of low melting point is not added, dry type ramming material is made to have high refractoriness, can be well
Meet the requirement of large-scale intermediate frequency furnace.In use process, working face is contacted with high-temperature molten steel, corundum and magnesia reaction
Magnesium aluminate spinel is generated, titanium oxide is reacted with magnesia generates magnesium titanate, and the magnesium titanate generated can be solid-solution in magnesium aluminate spinel
Middle formation composite spinelle, reaction-sintered can effectively facilitate the densification of mass transport process and dry type ramming material, make dry type ramming material
Have higher intensity, excellent scour resistance and erosion-resisting characteristics.
The yttrium oxide micro mist that the present invention adds can react generation wear-resisting property with plate diamond spar and erosion-resisting characteristics is excellent
Yttrium pyralspite disperse further increases the scour resistance and erosion-resisting characteristics of dry type ramming material in material.The oxidation of addition
Nickel can be solid-solution in magnesia lattice at high temperature, achieve the purpose that improve magnesia thermal shock resistance.Addition
ZrOCl2·8H2The zirconium oxide that submicron order is decomposed under O fine powder high temperature is wrapped in corundum fine powder surface, can prevent corundum and oxygen
Change magnesium and react too fast, guarantees that the non-working surface bulk structure sheaf of material has larger thickness, significantly improve the body of dry type ramming material
Product stability and thermal shock resistance；The zirconium oxide generated simultaneously further promotes material by transformation toughening and yttria stabilizator
The thermal shock resistance and antistrip performance of material.
The physicochemical property of the intermediate frequency furnace corundum dry type ramming material of this reality invention preparation are as follows: 1100 DEG C × 3h volume
Density is 2.88~2.98g/cm3, flexural strength is 7.5~9.5MPa, and Linear change rate is 0.7~1.2%；1600 DEG C × 3h body
Product density is 2.64~2.74g/cm3, flexural strength is 6.5~9.0MPa, and Linear change rate is 2.6~3.3%；Refractoriness is
1770~1800 DEG C, furnace life is 160~185 heats.
Therefore, intermediate frequency furnace prepared by the present invention corundum dry type ramming material has refractoriness height, volume stability
The feature good, elevated temperature strength is big, antistrip performance is good, scour resistance is excellent and erosion-resisting characteristics is good.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope:
It is first that raw material Unify legislation involved in present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment
It states:
The granularity of the electro-corundum particle is 0.5~5mm；The Al of the electro-corundum particle2O3Content > 99wt%.
The granularity of the plate diamond spar is 0.045~0.5mm；The Al of the plate diamond spar2O3Content > 99.3wt%.
The granularity of the fused magnesite is 0.075~1mm；The content of MgO > 97wt% of the fused magnesite.
5 μm of the granularity < of the yttrium oxide micro mist；The Y of the yttrium oxide micro mist2O3Content > 98wt%.
75 μm of the granularity < of the titanium dioxide fine powder；The TiO of the titanium dioxide fine powder2Content ﹥ 99wt%.
45 μm of granularity < of the oxidation nickel fine powder；The NiO content ﹥ 99wt% of the oxidation nickel fine powder.
Embodiment 1
A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof.Preparation method described in the present embodiment is:
With the electro-corundum particle, the plate diamond spar of 30~40wt% and the fused magnesite of 6~12wt% of 48~58wt%
For raw material, the yttrium oxide micro mist of the additional 0.5~1.0wt% of raw material, the titanium dioxide fine powder of 0.5~1.0wt%, 0.5~
The ZrOCl of 1.0wt%2·8H2The oxidation nickel fine powder of O fine powder and 0.5~1.0wt% is uniformly mixed to get intermediate frequency furnace use
Corundum dry type ramming material.
The physicochemical property of the corundum dry type ramming material of intermediate frequency furnace prepared by the present embodiment 1 are as follows: 1100 DEG C × 3h
Bulk density is 2.88~2.92g/cm3, flexural strength is 7.5~8.5MPa, and Linear change rate is 0.7~0.9%；1600℃×
3h bulk density is 2.64~2.68g/cm3, flexural strength is 6.5~7.5MPa, and Linear change rate is 2.6~3.0%；Refractoriness
It is 1770~1780 DEG C, furnace life is 160~170 heats.
Embodiment 2
A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof.Preparation method described in the present embodiment is:
With the electro-corundum particle, the plate diamond spar of 23~33wt% and the fused magnesite of 9~14wt% of 55~65wt%
For raw material, the yttrium oxide micro mist of the additional 1.0~1.5wt% of raw material, the titanium dioxide fine powder of 0.5~1.0wt%, 1.0~
The ZrOCl of 1.5wt%2·8H2The oxidation nickel fine powder of O fine powder and 0.5~1.0wt% is uniformly mixed to get intermediate frequency furnace use
Corundum dry type ramming material.
The physicochemical property of the corundum dry type ramming material of intermediate frequency furnace prepared by the present embodiment 2 are as follows: 1100 DEG C × 3h
Bulk density is 2.90~2.94g/cm3, flexural strength is 8.0~9.0MPa, and Linear change rate is 0.8~1.0%；1600℃×
3h bulk density is 2.66~2.70g/cm3, flexural strength is 7.0~8.0MPa, and Linear change rate is 2.7~3.1%；Refractoriness
It is 1775~1785 DEG C, furnace life is 165~175 heats.
Embodiment 3
A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof.Preparation method described in the present embodiment is:
With the electro-corundum particle, the plate diamond spar of 20~30wt% and the fused magnesite of 12~16wt% of 58~68wt%
For raw material, the yttrium oxide micro mist of the additional 0.8~1.3wt% of raw material, the titanium dioxide fine powder of 0.5~1.0wt%, 1.5~
The ZrOCl of 2.0wt%2·8H2The oxidation nickel fine powder of O fine powder and 0.5~1.0wt% is uniformly mixed to get intermediate frequency furnace use
Corundum dry type ramming material.
The physicochemical property of the corundum dry type ramming material of intermediate frequency furnace prepared by the present embodiment 3 are as follows: 1100 DEG C × 3h
Bulk density is 2.92~2.96g/cm3, flexural strength is 7.8~8.8MPa, and Linear change rate is 0.9~1.1%；1600℃×
3h bulk density is 2.68~2.72g/cm3, flexural strength is 7.5~8.5MPa, and Linear change rate is 2.8~3.2%；Refractoriness
It is 1780~1790 DEG C, furnace life is 170~180 heats.
Embodiment 4
A kind of intermediate frequency furnace corundum dry type ramming material and preparation method thereof.Preparation method described in the present embodiment is:
With the electro-corundum particle, the plate diamond spar of 28~38wt% and the fused magnesite of 10~15wt% of 50~60wt%
For raw material, the yttrium oxide micro mist of the additional 0.7~1.2wt% of raw material, the titanium dioxide fine powder of 0.5~1.0wt%, 0.8~
The ZrOCl of 1.3wt%2·8H2The oxidation nickel fine powder of O fine powder and 0.5~1.0wt% is uniformly mixed to get intermediate frequency furnace use
Corundum dry type ramming material.
The physicochemical property of the corundum dry type ramming material of intermediate frequency furnace prepared by the present embodiment 4 are as follows: 1100 DEG C × 3h
Bulk density is 2.94~2.98g/cm3, flexural strength is 8.5~9.5MPa, and Linear change rate is 1.0~1.2%；1600℃×
3h bulk density is 2.70~2.74g/cm3, flexural strength is 8.0~9.0MPa, and Linear change rate is 2.9~3.3%；Refractoriness
It is 1790~1800 DEG C, furnace life is 175~185 heats.
Present embodiment has following good effect compared with prior art:
Intermediate frequency furnace corundum dry type ramming material (hereinafter referred to as " the dry type ramming of present embodiment preparation
Material ") use corundum and magnesia for primary raw material, the additive of low melting point is not added, dry type ramming material is made to have high fire resisting
Degree, can meet the requirement of large-scale intermediate frequency furnace well.In use process, working face is contacted with high-temperature molten steel, corundum
It is reacted with magnesia and generates magnesium aluminate spinel, titanium oxide is reacted with magnesia generates magnesium titanate, and the magnesium titanate generated can be dissolved
Composite spinelle is formed in magnesium aluminate spinel, reaction-sintered can effectively facilitate the densification of mass transport process and dry type ramming material,
Dry type ramming material is set to have higher intensity, excellent scour resistance and erosion-resisting characteristics.
The yttrium oxide micro mist of present embodiment addition can be reacted with plate diamond spar generates wear-resisting property and corrosion resistance
Yttrium pyralspite disperse that can be excellent further increases the scour resistance and erosion-resisting characteristics of dry type ramming material in material.Add
The nickel oxide added can be solid-solution in magnesia lattice at high temperature, achieve the purpose that improve magnesia thermal shock resistance.Addition
ZrOCl2·8H2The zirconium oxide that submicron order is decomposed under O fine powder high temperature is wrapped in corundum fine powder surface, can prevent corundum with
Magnesia reaction is too fast, guarantees that the non-working surface bulk structure sheaf of material has larger thickness, significantly improves dry type ramming material
Volume stability and thermal shock resistance；The zirconium oxide generated simultaneously is further promoted by transformation toughening and yttria stabilizator
The thermal shock resistance and antistrip performance of material.
The physicochemical property of the intermediate frequency furnace corundum dry type ramming material of this reality specific embodiment preparation are as follows: 1100 DEG C
× 3h bulk density is 2.88~2.98g/cm3, flexural strength is 7.5~9.5MPa, and Linear change rate is 0.7~1.2%；1600
DEG C × 3h bulk density be 2.64~2.74g/cm3, flexural strength is 6.5~9.0MPa, and Linear change rate is 2.6~3.3%；It is resistance to
Fiery degree is 1770~1800 DEG C, and furnace life is 160~185 heats.
Therefore, the intermediate frequency furnace of present embodiment preparation corundum dry type ramming material has refractoriness height, body
The feature that product stability is good, elevated temperature strength is big, antistrip performance is good, scour resistance is excellent and erosion-resisting characteristics is good.
Claims (8)
1. a kind of intermediate frequency furnace preparation method of corundum dry type ramming material, it is characterised in that: with the electricity of 48~68wt%
The fused magnesite of molten corundum in granules, the plate diamond spar of 20~40wt% and 6~16wt% is raw material, the additional raw material 0.5~
The yttrium oxide micro mist of 1.5wt%, the titanium dioxide fine powder of 0.5~1.0wt%, 0.5~2.0wt% ZrOCl2·8H2O fine powder
It with the oxidation nickel fine powder of 0.5~1.0wt%, is uniformly mixed, intermediate frequency furnace corundum dry type ramming material is made.
2. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
The granularity for stating electro-corundum particle is 0.5~5mm；The Al of the electro-corundum particle2O3Content > 99wt%.
3. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
The granularity for stating plate diamond spar is 0.045~0.5mm；The Al of the plate diamond spar2O3Content > 99.3wt%.
4. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
The granularity for stating fused magnesite is 0.075~1mm；The content of MgO > 97wt% of the fused magnesite.
5. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
5 μm of granularity < for stating yttrium oxide micro mist；The Y of the yttrium oxide micro mist2O3Content > 98wt%.
6. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
75 μm of granularity < for stating titanium dioxide fine powder；The TiO2 content ﹥ 99wt% of the titanium dioxide fine powder.
7. the intermediate frequency furnace according to claim 1 preparation method of corundum dry type ramming material, it is characterised in that institute
45 μm of granularity < for stating oxidation nickel fine powder；The NiO content ﹥ 99wt% of the oxidation nickel fine powder.
8. a kind of intermediate frequency furnace corundum dry type ramming material, it is characterised in that the intermediate frequency furnace is smash with corundum dry type
Dnockout be any one of according to claim 1~7 described in intermediate frequency furnace corundum dry type ramming material preparation method
Prepared intermediate frequency furnace corundum dry type ramming material.
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| CN114956797A (en) * | 2022-05-06 | 2022-08-30 | 中国矿业大学 | Refractory castable for plasma melting furnace and preparation method |
| CN115215638A (en) * | 2022-09-19 | 2022-10-21 | 湖南立达高新材料有限公司 | Corundum dry-type ramming mass for medium-frequency induction furnace and preparation method thereof |
| CN115745576A (en) * | 2022-11-04 | 2023-03-07 | 海城利尔麦格西塔材料有限公司 | Aluminum-magnesium dry ramming mass and preparation method thereof |
| CN115925398A (en) * | 2023-01-19 | 2023-04-07 | 湖北安耐捷新材料科技有限公司 | Aluminum-magnesium dry-type ramming mass for medium-frequency induction furnace and preparation method thereof |
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| CN114380580A (en) * | 2021-12-29 | 2022-04-22 | 北京金隅通达耐火技术有限公司 | Corundum heat-resistant concrete with low ablation rate and preparation method and application thereof |
| CN114380580B (en) * | 2021-12-29 | 2023-05-05 | 北京金隅通达耐火技术有限公司 | Corundum low-ablation-rate heat-resistant concrete and preparation method and application thereof |
| CN114956797A (en) * | 2022-05-06 | 2022-08-30 | 中国矿业大学 | Refractory castable for plasma melting furnace and preparation method |
| CN115215638A (en) * | 2022-09-19 | 2022-10-21 | 湖南立达高新材料有限公司 | Corundum dry-type ramming mass for medium-frequency induction furnace and preparation method thereof |
| CN115215638B (en) * | 2022-09-19 | 2022-12-06 | 湖南立达高新材料有限公司 | Corundum dry-type ramming mass for medium-frequency induction furnace and preparation method thereof |
| CN115745576A (en) * | 2022-11-04 | 2023-03-07 | 海城利尔麦格西塔材料有限公司 | Aluminum-magnesium dry ramming mass and preparation method thereof |
| CN115925398A (en) * | 2023-01-19 | 2023-04-07 | 湖北安耐捷新材料科技有限公司 | Aluminum-magnesium dry-type ramming mass for medium-frequency induction furnace and preparation method thereof |
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