CN112707722A - 一种改性刚玉砖的生产方法 - Google Patents

一种改性刚玉砖的生产方法 Download PDF

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CN112707722A
CN112707722A CN202011614722.8A CN202011614722A CN112707722A CN 112707722 A CN112707722 A CN 112707722A CN 202011614722 A CN202011614722 A CN 202011614722A CN 112707722 A CN112707722 A CN 112707722A
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宋二鹏
宋进朝
孟祥峰
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Gongyi Xinke Refractory Co ltd
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Abstract

本发明公开了一种改性刚玉砖的配方,包括以下原料:电熔白刚玉、氧化铝空心球、活性α‑Al2O3微粉、ρ‑Al2O3微粉、铝溶胶,且原料中组分粒径的选择,便于刚玉砖进行改性制备。

Description

一种改性刚玉砖的生产方法
技术领域
本发明涉及刚玉砖技术领域,具体涉及一种改性刚玉砖的生产方法。
背景技术
炭黑反应炉是炭黑生产工艺中的关键设备,炭黑反应炉由燃烧室、喉管、反应段、急冷段和停留段5大部分构成。炭黑反应炉急冷段是炭黑的反应生成阶段,在该段高温的反应裂解气体经喷水急速降温形成炭黑,温度变化很大,由1900℃突降到1400℃左右,因此炭黑炉急冷段内衬所用耐火材料,要求(1)抗化学侵蚀性能好;(2)高温性能好;(3)抗急冷急热性能好;(4)抗气流冲刷性能好。目前所用的耐火材料都是高纯白刚玉砖。
发明内容
本发明的目的在于提供一种改性刚玉砖的生产方法,解决炭黑反应炉急冷内衬所用耐火材料为高纯刚玉砖,高纯刚玉砖目前存在的问题是由于纯度较高,难于烧结,必须在1750℃以上的温度才能烧结,并且高纯白刚玉砖的抗急冷急热性能差,在高温使用条件下,温度的波动引起刚玉砖的开裂和剥落掉块,影响炉子的使用寿命的问题。
为解决上述的技术问题,本发明采用以下技术方案:
一种改性刚玉砖的配方,包括以下原料:电熔白刚玉、氧化铝空心球、活性α-Al2O3微粉、ρ-Al2O3微粉、铝溶胶。
进一步的;所述电熔白刚玉的粒径选择3-5mm、1-3mm、小于1mm的三种以及目数为200目和320目的两种;其中:
3-5mm为大于3mm,小于等于5mm;
1-3mm为大于等于1mm,小于等于3mm;
200目和320目按照国际目数标准执行。
进一步的;所述原料以质量份计为:3-5mm的电熔白刚玉3-6份、1-3mm的电熔白刚玉35-40份、小于1mm的电熔白刚玉8-12份、200目的电熔白刚玉15-20份、320目的电熔白刚玉12-18份、氧化铝空心球2-6份、活性α-Al2O3微粉4-8份、ρ-Al2O3微粉2-4份、铝溶胶2.5-3.5份。
进一步的;所述氧化铝空心球的粒径为小于0.2mm。
进一步的;所述铝溶胶的比重为1.35-1.45g/cm3
进一步的;制备方法为:
(1)细粉预混合:按配方量准确称量200目电熔白刚玉粉、320目电熔白刚玉粉、活性α-Al2O3微粉、ρ-Al2O3微粉,在预混机中共混30min,出料后备用;
(2)骨料混合:按配方量准确称量3-5mm电熔白刚玉、1-3mm电熔白刚玉、小于1mm电熔白刚玉、0-0.2mm氧化铝空心球一起加入湿碾机中干混2-3min,在加入2/3量的铝溶胶,混合5-10min,然后加入步骤(1)预混合后得到的细粉,再混合3-5min,然后加入剩余1/3量的铝溶胶,最后混合15-25min,出料;
(3)成型:将步骤(2)所得到的的泥料采用摩擦压力机成型;
(4)烘干:将步骤(3)成型后的砖坯在120℃条件下干燥24-36小时;
(5)烧成:将步骤(4)干燥后的砖坯在1450℃-1550℃条件下烧成。
进一步的;所述步骤(3)中,压力机的压力参数为315t、630t或1000t。
进一步的;所述步骤(5)中,烧成保温时间为8-12h。
与现有技术相比,本发明的至少具有以下有益效果之一:
1、选择的电熔白刚玉、氧化铝空心球、活性α-Al2O3微粉、ρ-Al2O3微粉、铝溶胶使得制备的产品,使用环境增加临界力度,增强稳定性,节能环保。
2、本发明采用铝溶胶做粘结剂,制造炭黑炉和石化行业用高纯刚玉砖,引入小颗粒氧化铝空心球,利用空心球的空心,在高温下可以吸收刚玉的热膨胀应力,降低刚玉的热膨胀性,提高高纯刚玉砖的抗急冷急热性能。本发明改性刚玉砖具有烧成温度低,强度高,抗急冷急热性能好等特点,可以满足炭黑炉急冷段的使用要求。
3、制备的产品便于烧结,且产品的抗化学侵蚀性能好;高温性能好;抗急冷急热性能好;抗气流冲刷性能好
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合实施例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1:
一种改性刚玉砖的配方,包括以下原料:电熔白刚玉、氧化铝空心球、活性α-Al2O3微粉、ρ-Al2O3微粉、铝溶胶;采用铝溶胶做粘结剂,制造炭黑炉和石化行业用高纯刚玉砖,引入小颗粒氧化铝空心球,利用空心球的空心,在高温下可以吸收刚玉的热膨胀应力,降低刚玉的热膨胀性,提高高纯刚玉砖的抗急冷急热性能。
实施例2:
在实施例1的基础上,电熔白刚玉的粒径选择3-5mm、1-3mm、小于1mm的三种以及目数为200目和320目的两种。电熔白刚玉选择利于制备产品的品质较好。
实施例3:
在实施例1-2的基础上,原料以质量份计为:3-5mm的电熔白刚玉3份、1-3mm的电熔白刚玉35份、小于1mm的电熔白刚玉8份、200目的电熔白刚玉15份、320目的电熔白刚玉12份、氧化铝空心球2份、活性α-Al2O3微粉4份、ρ-Al2O3微粉2份、铝溶胶2.5份;不同组分的原料制备的刚玉砖,具有烧成温度低,强度高,抗急冷急热性能好等特点,可以满足炭黑炉急冷段的使用要求。
实施例4:
在实施例1-3的基础上,原料以质量份计为:3-5mm的电熔白刚玉6份、1-3mm的电熔白刚玉40份、小于1mm的电熔白刚玉12份、200目的电熔白刚玉20份、320目的电熔白刚玉18份、氧化铝空心球6份、活性α-Al2O3微粉8份、ρ-Al2O3微粉4份、铝溶胶3.5份;不同组分的原料制备的刚玉砖,具有烧成温度低,强度高,抗急冷急热性能好等特点,可以满足炭黑炉急冷段的使用要求。
实施例5:
在实施例1-4的基础上,原料以质量份计为:3-5mm的电熔白刚玉4.5份、1-3mm的电熔白刚玉37.5份、小于1mm的电熔白刚玉10份、200目的电熔白刚玉17.5份、320目的电熔白刚玉15份、氧化铝空心球4份、活性α-Al2O3微粉6份、ρ-Al2O3微粉3份、铝溶胶3份;不同组分的原料制备的刚玉砖,具有烧成温度低,强度高,抗急冷急热性能好等特点,可以满足炭黑炉急冷段的使用要求。
实施例6:
在实施例1-5的基础上,氧化铝空心球的粒径为小于0.2mm;粒径的大小选择,利于产品的制备。
实施例7:
在实施例1-6的基础上,铝溶胶的比重为1.45g/cm3;铝溶胶较好的作为粘结剂。
实施例8:
在实施例1-7的基础上,铝溶胶的比重为1.35g/cm3;铝溶胶较好的作为粘结剂。
实施例9:
在实施例1-8的基础上,铝溶胶的比重为1.40g/cm3;铝溶胶较好的作为粘结剂。
实施例10:
在实施例1-9的基础上,制备方法为:
(1)细粉预混合:按配方量准确称量200目电熔白刚玉粉、320目电熔白刚玉粉、活性α-Al2O3微粉、ρ-Al2O3微粉,在预混机中共混30min,出料后备用;
(2)骨料混合:按配方量准确称量3-5mm电熔白刚玉、1-3mm电熔白刚玉、小于1mm电熔白刚玉、0-0.2mm氧化铝空心球一起加入湿碾机中干混2-3min,在加入2/3量的铝溶胶,混合5min,然后加入步骤(1)预混合后得到的细粉,再混合3min,然后加入剩余1/3量的铝溶胶,最后混合15min,出料;
(3)成型:将步骤(2)所得到的的泥料采用摩擦压力机成型;
(4)烘干:将步骤(3)成型后的砖坯在120℃条件下干燥24小时;
(5)烧成:将步骤(4)干燥后的砖坯在1450℃条件下烧成;
各原料通过细粉预混合、骨料混合,在通过压力机进行定型,砖坯进行干燥后烧制,使得烧制的产品使用环境增加临界力度,增强稳定性,节能环保。
实施例11:
在实施例1-10的基础上,制备方法为:
((1)细粉预混合:按配方量准确称量200目电熔白刚玉粉、320目电熔白刚玉粉、活性α-Al2O3微粉、ρ-Al2O3微粉,在预混机中共混30min,出料后备用;
(2)骨料混合:按配方量准确称量3-5mm电熔白刚玉、1-3mm电熔白刚玉、小于1mm电熔白刚玉、0-0.2mm氧化铝空心球一起加入湿碾机中干混2-3min,在加入2/3量的铝溶胶,混合10min,然后加入步骤(1)预混合后得到的细粉,再混合5min,然后加入剩余1/3量的铝溶胶,最后混合25min,出料;
(3)成型:将步骤(2)所得到的的泥料采用摩擦压力机成型;
(4)烘干:将步骤(3)成型后的砖坯在120℃条件下干燥36小时;
(5)烧成:将步骤(4)干燥后的砖坯在1550℃条件下烧成;
各原料通过细粉预混合、骨料混合,在通过压力机进行定型,砖坯进行干燥后烧制,使得烧制的产品使用环境增加临界力度,增强稳定性,节能环保。
实施例12:
在实施例1-11的基础上,制备方法为:
(1)细粉预混合:按配方量准确称量200目电熔白刚玉粉、320目电熔白刚玉粉、活性α-Al2O3微粉、ρ-Al2O3微粉,在预混机中共混30min,出料后备用;
(2)骨料混合:按配方量准确称量3-5mm电熔白刚玉、1-3mm电熔白刚玉、小于1mm电熔白刚玉、0-0.2mm氧化铝空心球一起加入湿碾机中干混2-3min,在加入2/3量的铝溶胶,混合7.5min,然后加入步骤(1)预混合后得到的细粉,再混合4min,然后加入剩余1/3量的铝溶胶,最后混合20min,出料;
(3)成型:将步骤(2)所得到的的泥料采用摩擦压力机成型;
(4)烘干:将步骤(3)成型后的砖坯在120℃条件下干燥30小时;
(5)烧成:将步骤(4)干燥后的砖坯在1500℃条件下烧成;
各原料通过细粉预混合、骨料混合,在通过压力机进行定型,砖坯进行干燥后烧制,使得烧制的产品使用环境增加临界力度,增强稳定性,节能环保。
实施例13:
在实施例1-12的基础上,步骤(3)中,压力机的压力参数为315t、630t或1000t;便于压力机进行定型。
实施例14:
在实施例1-13的基础上,步骤(5)中,烧成保温时间为8h;便于刚玉砖的制备。
实施例15:
在实施例1-14的基础上,步骤(5)中,烧成保温时间为12h;便于刚玉砖的制备。
实施例16:
在实施例1-15的基础上,步骤(5)中,烧成保温时间为10h;便于刚玉砖的制备。
本发明采用铝溶胶做粘结剂,制造炭黑炉和石化行业用高纯刚玉砖,引入小颗粒氧化铝空心球,利用空心球的空心,在高温下可以吸收刚玉的热膨胀应力,降低刚玉的热膨胀性,提高高纯刚玉砖的抗急冷急热性能。本发明改性刚玉砖具有烧成温度低,强度高,抗急冷急热性能好等特点,可以满足炭黑炉急冷段的使用要求。
Al2O3≥98.0%,体积密度≥3.10g/cm3,耐压强度≥65MPa,热震稳定性(1100℃水冷)≥20次。
尽管这里参照本发明的多个解释性实施例对本发明进行了描述,但是,应该理解,本领域技术人员可以设计出很多其他的修改和实施方式,这些修改和实施方式将落在本申请公开的原则范围和精神之内。更具体地说,在本申请公开和权利要求的范围内,可以对主题组合布局的组成部件和/或布局进行多种变型和改进。除了对组成部件和/或布局进行的变形和改进外,对于本领域技术人员来说,其他的用途也将是明显的。

Claims (8)

1.一种改性刚玉砖的配方,其特征在于:包括以下原料:电熔白刚玉、氧化铝空心球、活性α-Al2O3微粉、ρ-Al2O3微粉、铝溶胶。
2.根据权利要求1所述的一种改性刚玉砖的配方,其特征在于:所述电熔白刚玉的粒径选择3-5mm、1-3mm、小于1mm的三种以及目数为200目和320目的两种。
3.根据权利要求1所述的一种改性刚玉砖的配方,其特征在于:所述原料以质量份计为:3-5mm的电熔白刚玉3-6份、1-3mm的电熔白刚玉35-40份、小于1mm的电熔白刚玉8-12份、200目的电熔白刚玉15-20份、320目的电熔白刚玉12-18份、氧化铝空心球2-6份、活性α-Al2O3微粉4-8份、ρ-Al2O3微粉2-4份、铝溶胶2.5-3.5份。
4.根据权利要求1所述的一种改性刚玉砖的配方,其特征在于:所述氧化铝空心球的粒径为小于0.2mm。
5.根据权利要求1所述的一种改性刚玉砖的配方,其特征在于:所述铝溶胶的比重为1.35-1.45g/cm3
6.使用权利要求1-5任意一项所述的一种改性刚玉砖的生产方法,其特征在于:制备方法为:
(1)细粉预混合:按配方量准确称量200目电熔白刚玉粉、320目电熔白刚玉粉、活性α-Al2O3微粉、ρ-Al2O3微粉,在预混机中共混30min,出料后备用;
(2)骨料混合:按配方量准确称量3-5mm电熔白刚玉、1-3mm电熔白刚玉、小于1mm电熔白刚玉、0-0.2mm氧化铝空心球一起加入湿碾机中干混2-3min,在加入2/3量的铝溶胶,混合5-10min,然后加入步骤(1)预混合后得到的细粉,再混合3-5min,然后加入剩余1/3量的铝溶胶,最后混合15-25min,出料;
(3)成型:将步骤(2)所得到的的泥料采用摩擦压力机成型;
(4)烘干:将步骤(3)成型后的砖坯在120℃条件下干燥24-36小时;
(5)烧成:将步骤(4)干燥后的砖坯在1450℃-1550℃条件下烧成。
7.根据权利要求6所述的一种改性刚玉砖的生产方法,其特征在于:所述步骤(3)中,压力机的压力参数为315t、630t或1000t。
8.根据权利要求6所述的一种改性刚玉砖的生产方法,其特征在于:所述步骤(5)中,烧成保温时间为8-12h。
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