CN107805059A - 一种钢包底座砖及其制备方法 - Google Patents
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- 239000011449 brick Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000010227 cup method (microbiological evaluation) Methods 0.000 title abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 35
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims abstract description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- 239000010431 corundum Substances 0.000 claims abstract description 13
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 13
- 239000011029 spinel Substances 0.000 claims abstract description 12
- 229910052596 spinel Inorganic materials 0.000 claims abstract description 12
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000010432 diamond Substances 0.000 claims abstract description 8
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 8
- 239000003595 mist Substances 0.000 claims abstract description 6
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004898 kneading Methods 0.000 claims description 8
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- -1 magnesium aluminate Chemical class 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 2
- 230000003467 diminishing effect Effects 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- 239000002002 slurry Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 235000014380 magnesium carbonate Nutrition 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical group O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- QRRWWGNBSQSBAM-UHFFFAOYSA-N alumane;chromium Chemical compound [AlH3].[Cr] QRRWWGNBSQSBAM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 239000013500 performance material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000005829 trimerization reaction Methods 0.000 description 1
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- 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
- C04B35/10—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 aluminium oxide
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- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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Abstract
本发明公开了一种钢包底座砖及其制备方法,所述钢包底座砖由混合料和外加的金属铝粉及减水剂制备得到,所述混合料包括如下重量百分比的原料:板状刚玉颗粒13‑22%;矾土颗粒10‑20%;铬刚玉颗粒10‑30%;尖晶石颗粒5‑20%;镁砂颗粒3‑10%;刚玉质细粉10‑20%;α‑氧化铝微粉5‑10%;硅微粉2‑6%。本发明公开的钢包底座砖适用于钢包包底部位,连接上下水口与滑板,使用该制品可有效提高钢包底部寿命,同时由于该制品中含有铬刚玉废料,使废料得到充分利用,同时又能达到技术指标要求,具有显著地社会效益和经济效益。每吨生产成本较原来可节省250‑300元。
Description
技术领域
本发明属于耐火材料不定型产品领域,具体涉及一种钢包底座砖及其制备方法。
背景技术
目前,钢包底座砖主要采用刚玉尖晶石质或刚玉质,由于刚玉尖晶石座砖中含有较多板状刚玉或白刚玉、尖晶石等性能稳定材料,使得刚玉尖晶石质座砖性能非常稳定,但是随着刚玉类原料的价格不断上涨,其生产制造成本也在提高。如何在保证钢包底座砖性能稳定的同时,节约生产制造成本,是目前钢铁生产行业面临的普遍问题。
发明内容
为解决上述问题,本发明提供了一种钢包包底砖及其制备方法,在原料中加入了铬刚玉颗粒,铬刚玉主要为电熔铬刚玉,是用炉外冶炼制备金属铬或铬合金时产生的一种废弃物,利用铬刚玉生产的钢包底座砖的技术指标与目前刚玉胶结料相当,可满足钢厂使用要求,且明显降低生产成本。
本发明采取的技术方案为:
一种钢包底座砖,所述钢包底座砖由混合料和外加的金属铝粉及减水剂制备得到,所述混合料包括如下重量百分比的原料:
进一步地,所述混合料优选为包括如下重量百分比的原料:
所述金属铝粉的重量为所述混合料重量的0.1-1%。
所述减水剂的重量为所述混合料重量的0.1-1%。
所述减水剂包括ADS型高效减水剂、ADW型高效减水剂或FS10高效减水剂中的一种或者多种。
所述刚玉质细粉为白刚玉细粉,其组分中Al2O3含量≥98.5%,所述白刚玉细粉的pH值呈中性。
所述尖晶石颗粒为镁铝尖晶石颗粒,其组分中MgO含量≥34%,MgO+Al2O3-含量≥90%。
所述矾土颗粒的组分中Al2O3≥88%;所述电熔镁砂颗粒的组分中MgO含量≥97%,所述硅微粉的组分中SiO2含量≥90%。
所述铬刚玉颗粒的组分中氧化铝含量大于94%,氧化铬含量小于3%。
本发明还提供了所述钢包底座砖的制备方法,所述制备方法包括以下步骤:
(1)将配方量的刚玉质细粉、α-氧化铝微粉、硅微粉、金属铝粉、减水剂预混25~30min,得到预混细粉;
(2)向混炼机中加入配方量的板状刚玉颗粒、矾土颗粒、铬刚玉颗粒、尖晶石颗粒、镁砂颗粒,混碾1~2分钟后,加入步骤(1)得到的预混细粉,继续混练2-3min,加水至泥料表面泛浆为止,总混练时间为8-12min;
(3)浇注震动成型、脱模、烘烤;
(4)检验、包装。
进一步地,所述烘烤的温度为350~400℃,时间36-48h。
本发明提供的钢包底座砖的配方中,矾土颗粒及板状刚玉颗粒提供骨架支撑作用,可提高产品强度、抗侵蚀等性能,尖晶石颗粒较小起填充弥补作用,可在高温下提高其抗钢水侵蚀作用,微粉和减水剂可提高产品高温烧结性能。铬刚玉颗粒作为氧化铝与氧化铬的固溶体,可有效将组分中颗粒与细粉连接起来,大大提高制品强度。配方中,各原料不同粒径级别的设置符合紧密堆积原理,利于提高制品的强度。高效减水剂不同于普通三聚、六偏型减水剂,该减水剂可大大降低加水量,消除因水分挥发后留下的气孔对产品性能造成的不良影响,且该高效减水剂能明显改善产品的常温强度指标。
本发明公开的钢包底座砖适用于钢包包底部位,连接上下水口与滑板,使用该制品可有效提高钢包底部寿命,同时由于该制品中含有铬刚玉(铝铬渣)废料,使废料得到充分利用,同时又能达到技术指标要求,采用本发明公开的方法得到的钢包底座砖的耐压强度≥60Mpa、体密≥3g/cm3、抗折强度≥8Mpa、荷重软化温度≥1500℃;具有显著地社会效益和经济效益。每吨生产成本较原来可节省250-300元。
具体实施方式
实施例1
一种钢包底座砖,由混合料和外加的金属铝粉及ADS型高效减水剂制备得到,所述混合料包括如表1所示重量百分比的原料,金属铝粉、ADS型高效减水剂的重量分别为混合料重量的0.5%和1.0%,所述金属铝粉的粒径为325目。
所述钢包底座砖的制备方法为:
(1)将刚玉质细粉、α-氧化铝微粉、硅微粉、金属铝粉、减水剂预混25~30min,得到预混细粉;
(2)向混炼机中加入配方量的板状刚玉颗粒、矾土颗粒、铬刚玉颗粒、尖晶石颗粒、镁砂颗粒,混碾1~2分钟后,加入步骤(1)得到的预混细粉,继续混练2-3min,加水至泥料表面泛浆为止,总混练时间为8-12min;
(3)浇注震动成型、脱模、350~400℃烘烤36-48h;
(4)检验、包装。
表1
实施例2
一种钢包底座砖,由混合料和外加的金属铝粉及ADW型高效减水剂制备得到,所述混合料包括如表1所示重量百分比的原料,金属铝粉、减水剂的重量分别为混合料重量的0.7%和0.8%,所述金属铝粉的粒径为325目。
所述钢包底座砖的制备方法为:
(1)将刚玉质细粉、α-氧化铝微粉、硅微粉、金属铝粉、ADW型高效减水剂预混25~30min,得到预混细粉;
(2)向混炼机中加入配方量的板状刚玉颗粒、矾土颗粒、铬刚玉颗粒、尖晶石颗粒、镁砂颗粒,混碾1~2分钟后,加入步骤(1)得到的预混细粉,继续混练2-3min,加水至泥料表面泛浆为止,总混练时间为8-12min;
(3)浇注震动成型、脱模、350~400℃烘烤36-48h;
(4)检验、包装。
表2
对比例1
其他同实施例1,只是将其中的ADS型高效减水剂替换为三聚氰胺减水剂。
对比例2
其他同实施例1,只是将所有颗粒原料的粒径都替换为5-3mm。
对比例3
其他同实施例1,只是将其中的铬刚玉颗粒替换为15%的板状刚玉颗粒和10%的电熔镁砂颗粒。
以上各实施例和对比例得到的钢包底座砖的性能测试结果如表3所示。
表3各实施例及对比例得到的钢包底座砖的性能测试结果
上述参照实施例对一种钢包底座砖及其制备方法进行的详细描述,是说明性的而不是限定性的,可按照所限定范围列举出若干个实施例,因此在不脱离本发明总体构思下的变化和修改,应属本发明的保护范围之内。
Claims (9)
1.一种钢包底座砖,其特征在于,所述钢包底座砖由混合料和外加的金属铝粉及减水剂制备得到,所述混合料包括如下重量百分比的原料:
2.根据权利要求1所述的钢包底座砖,其特征在于,所述混合料包括如下重量百分比的原料:
3.根据权利要求1或2所述的钢包底座砖,其特征在于,所述金属铝粉的重量为所述混合料重量的0.1-1%。
4.根据权利要求1或2所述的钢包底座砖,其特征在于,所述减水剂的重量为所述混合料重量的0.1-1%。
5.根据权利要求1或2所述的钢包底座砖,其特征在于,所述减水剂包括ADS型高效减水剂、ADW型高效减水剂或FS10高效减水剂中的一种或者多种。
6.根据权利要求1或2所述的钢包底座砖,其特征在于,所述刚玉质细粉为白刚玉细粉,其组分中Al2O3含量≥98.5%,所述白刚玉细粉的pH值呈中性。
7.根据权利要求1或2所述的钢包底座砖,其特征在于,所述尖晶石颗粒为镁铝尖晶石颗粒,其组分中MgO含量≥34%,MgO+Al2O3含量≥90%。
8.根据权利要求1或2所述的钢包底座砖的制备方法,其特征在于,所述制备方法包括以下步骤:
(1)将配方量的刚玉质细粉、α-氧化铝微粉、硅微粉、金属铝粉、减水剂预混25~30min,得到预混细粉;
(2)向混炼机中加入配方量的板状刚玉颗粒、矾土颗粒、铬刚玉颗粒、尖晶石颗粒、镁砂颗粒,混碾1~2分钟后,加入步骤(1)得到的预混细粉,继续混练2-3min,加水至泥料表面泛浆为止,总混练时间为8-12min;
(3)浇注震动成型、脱模、烘烤;
(4)检验、包装。
9.根据权利要求8所述的制备方法,其特征在于,所述烘烤的温度为350~400℃,时间36-48h。
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