CN116589288A - 一种抗氧化的镁碳砖 - Google Patents
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- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 72
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000011449 brick Substances 0.000 title claims abstract description 43
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 43
- 239000003963 antioxidant agent Substances 0.000 title description 9
- 230000003078 antioxidant effect Effects 0.000 title description 9
- 239000002245 particle Substances 0.000 claims abstract description 24
- 230000003647 oxidation Effects 0.000 claims abstract description 22
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 22
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 19
- 239000011575 calcium Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 10
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 10
- 239000010439 graphite Substances 0.000 claims abstract description 10
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000005011 phenolic resin Substances 0.000 claims abstract description 10
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 10
- 230000003064 anti-oxidating effect Effects 0.000 claims 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000003723 Smelting Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 description 4
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011233 carbonaceous binding agent Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3804—Borides
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3821—Boron carbides
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9684—Oxidation resistance
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Abstract
本发明涉及一种镁碳砖，尤其是一种抗氧化的镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒60～80份、电熔镁砂细粉10～20份、石墨10～20份、硼化钙0.1～1份、碳化硼0.1～1份、酚醛树脂1～5份、乌洛托品0.1～1份。本发明提供一种抗氧化的镁碳砖，在原料中加入硼化钙能够提高镁碳砖的抗氧化性，进而满足特钢冶炼的要求，满足镁碳砖的优异性能。
Description
技术领域
本发明涉及一种镁碳砖，尤其是一种抗氧化的镁碳砖。
背景技术
镁碳砖是以高熔点碱性氧化物氧化镁(熔点2800℃)和难以被炉渣侵润的高熔点碳素材料作为原料，添加各种非氧化物添加剂，用炭质结合剂结合而成的不烧炭复合耐火材料。镁碳砖广泛应用于炼钢高炉、电炉、转炉、精炼炉连铸***和钢包的内衬部位。
镁碳砖作为一种复合耐火材料，有效地利用了镁砂的抗渣侵蚀能力强和碳的高导热性及低膨胀性，补偿了镁砂耐剥落性差的最大缺点。镁碳砖的优良性能依赖于砖中碳的存在，使用过程中碳的氧化易造成制品组织劣化，使炉渣沿着缝隙侵入砖中，侵蚀氧化镁颗粒，降低镁碳砖的使用寿命。
随着生产技术的不断发展和提高，对于耐火材料的要求也不断增加，因此提高镁碳砖的抗氧化性显得极为重要。
发明内容
本发明提供一种抗氧化的镁碳砖，以解决现有技术存在的镁碳砖抗氧化性差，使用过程中碳的氧化易造成制品组织劣化的问题。
为解决上述技术问题，本发明提供一种抗氧化的镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒60～80份、电熔镁砂细粉10～20份、石墨10～20份、硼化钙0.1～1份、碳化硼0.1～1份、酚醛树脂1～5份、乌洛托品0.1～1份。
所述电熔镁砂颗粒包括三种粒度的镁砂颗粒，三种粒度分别为5～3mm、3～1mm、≤1mm。
所述电熔镁砂细粉的粒度为≤0.088mm。
所述电熔镁砂颗粒的重量份数为74份，所述电熔镁砂细粉的重量分数为11份，所述石墨的重量分数为15份，所述硼化钙的重量份为0.2份，所述碳化硼的重量份为0.2份，所述酚醛树脂的重量分数为3份，所述乌洛托品的重量分数为0.3份。
本发明带来的有益效果：本发明提供一种抗氧化的镁碳砖，在原料中加入硼化钙能够提高镁碳砖的抗氧化性，进而满足特钢冶炼的要求，满足镁碳砖的优异性能。
由于加入抗氧化剂硼化钙，防止了碳的氧化，同时促进了组织结构的进一步致密化，使得镁碳砖的高温抗折强度、抗氧化性和抗侵蚀性大大提高，从而提高了镁碳砖的使用寿命。
具体实施方式
现结合实施例对本发明作进一步说明。
本发明提供一种抗氧化的镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒60～80份、电熔镁砂细粉10～20份、石墨10～20份、硼化钙0.1～1份、碳化硼0.1～1份、酚醛树脂1～5份、乌洛托品0.1～1份。
在本实施例中，所述电熔镁砂颗粒包括三种粒度的镁砂颗粒，三种粒度分别为5～3mm、3～1mm、≤1mm。所述电熔镁砂细粉的粒度为≤0.088mm。
实施例一
优选的，本实施例中，所述电熔镁砂颗粒的重量份数为74份(电熔镁砂的粒度分布见表1)，所述电熔镁砂细粉的重量分数为11份，所述石墨的重量分数为15份，所述硼化钙的重量份为0.2份，所述碳化硼的重量份为0.2份，所述酚醛树脂的重量分数为3份，所述乌洛托品的重量分数为0.3份。
表1电熔镁砂的粒度分布
将上述原料按比例称量后充分混炼，放入模具中，然后对其进行压制成型，成型后的砖坯放入窑道中烘烤，从窑道中取出后即为成品镁碳砖。
硼化钙理化性能相当稳定，具有不溶于水、抗氧化、抗热冲击、抗化学侵蚀等特性。尤其在热冲击下具有很高的强度和稳定性。本发明的镁碳砖由于加入抗氧化剂硼化钙，防止了碳的氧化，同时促进了组织结构的进一步致密化，使得镁碳砖的高温抗折强度、抗氧化性和抗侵蚀性大大提高，从而提高了镁碳砖的使用寿命。
本发明提供一种抗氧化的镁碳砖，在原料中加入硼化钙能够提高镁碳砖的抗氧化性，进而满足特钢冶炼的要求，满足镁碳砖的优异性能。
实施例二
本发明提供一种抗氧化的镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒60份、电熔镁砂细粉10份、石墨10份、硼化钙0.1份、碳化硼0.1份、酚醛树脂1份、乌洛托品0.1份。
实施例三
本发明提供一种抗氧化的镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒80份、电熔镁砂细粉20份、石墨20份、硼化钙1份、碳化硼1份、酚醛树脂5份、乌洛托品1份。
对比例一
镁碳砖，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒75份、电熔镁砂细粉15份、石墨15份、碳化硼0.5份、酚醛树脂2.5份、乌洛托品0.5份。
各项性能检测数据如表1所示。
表1
| 项目 | 实施例一 | 实施例二 | 实施例三 | 对比例一 |
| 体积密度(g/m3) | 3.15 | 3.12 | 3.05 | 3.02 |
| 显气孔率(％) | 2.1 | 2.3 | 2.2 | 2.1 |
| 常温耐压强度(Mpa) | 52 | 53.3 | 51.5 | 50.2 |
| 高温抗折强度(Mpa) | 6.5 | 6.4 | 6.1 | 5.9 |
| 抗氧化性(脱碳层厚度mm) | 3.1 | 3.5 | 2.9 | 4.8 |
| 线线膨胀率 | 0.12 | 0.1 | 0.13 | 0.1 |
由表1可知，同样条件下添加硼化钙的镁碳砖与没有添加硼化钙的镁碳砖相比，各项性能均相近，但添加硼化钙的镁碳砖的抗氧化性和高温抗折强度要优于没有添加硼化钙镁碳砖。
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理，而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明权利要求的保护范围之内。
Claims (4)
1.一种抗氧化的镁碳砖，其特征在于，包括以下组份，各组分按重量份数计为：电熔镁砂颗粒60～80份、电熔镁砂细粉10～20份、石墨10～20份、硼化钙0.1～1份、碳化硼0.1～1份、酚醛树脂1～5份、乌洛托品0.1～1份。
2.根据权利要求1所述的一种抗氧化的镁碳砖，其特征在于，所述电熔镁砂颗粒包括三种粒度的镁砂颗粒，三种粒度分别为5～3mm、3～1mm、≤1mm。
3.根据权利要求1所述的一种抗氧化的镁碳砖，其特征在于，所述电熔镁砂细粉的粒度为≤0.088mm。
4.根据权利要求1所述的一种抗氧化的镁碳砖，其特征在于，所述电熔镁砂颗粒的重量份数为74份，所述电熔镁砂细粉的重量分数为11份，所述石墨的重量分数为15份，所述硼化钙的重量份为0.2份，所述碳化硼的重量份为0.2份，所述酚醛树脂的重量分数为3份，所述乌洛托品的重量分数为0.3份。
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