CN108409301A - 一种镁碳砖及其制备方法 - Google Patents
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Abstract
本发明涉及一种镁碳砖及其制备方法,各组分按重量份数计为:电熔镁砂颗粒60~75份、电熔镁砂细粉10~30份、酚醛树脂5~10份、二氧化钛1~2份、金属锂粉1~2份,制备时首先将各组分混炼制成泥料,然后将泥料加入至模具中进行压制成型,最后将压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖。本发明制备方法简单,步骤易于操作,在原料中加入二氧化钛和金属锂粉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及其制备方法,属于耐火材料制备技术领域。
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碳复合耐火材料。镁碳砖主要用于转炉、交流电弧炉、直流电弧炉的内衬,钢包的渣线等部位。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。
发明内容
本发明的目的是克服现有技术中存在的不足,提供一种制备方法简单,步骤易于操作的镁碳砖及其制备方法。
本发明提供的技术方案,一种镁碳砖,各组分按重量份数计为:电熔镁砂颗粒60~75份、电熔镁砂细粉10~30份、酚醛树脂5~10份、二氧化钛1~2份、金属锂粉1~2份。
进一步的,所述电熔镁砂颗粒大小为1~5mm。
进一步的,所述电熔镁砂细粉的粒度为300~350目。
镁碳砖的制备方法,包括如下步骤:
(1)混炼:按重量份数分别称取电熔镁砂颗粒60~75份、电熔镁砂细粉10~30份、酚醛树脂5~10份、二氧化钛1~2份、金属锂粉1~2份,首先将电熔镁砂颗粒放入混炼机中干混5~10min,接着加入酚醛树脂,继续混合5~20min,然后加入二氧化钛混合5~10min,最后加入电熔镁砂细粉和金属锂粉继续混合10~20min形成泥料;
(2)压制成型:将泥料加入至模具中进行压制成型,成型压力为2500~6000KN;
(3)烘烤固化:将步骤(2)中压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖,烘烤温度为150~300℃,烘烤时间为10~20h。
进一步的,所述步骤(1)中采用连续混炼机的转速为900~1000 rad/min,混炼时间为20~60min。
本发明制备方法简单,步骤易于操作,在原料中加入二氧化钛和金属锂粉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。
具体实施方式
下面结合具体实施例对本发明作进一步说明。
实施例一:
一种镁碳砖,各组分按重量份数计为:电熔镁砂颗粒60份、电熔镁砂细粉30份、酚醛树脂5份、二氧化钛2份、金属锂粉2份,电熔镁砂颗粒大小为5mm,电熔镁砂细粉的粒度为300目。
镁碳砖的制备方法,包括如下步骤:
(1)混炼:按重量份数分别称取电熔镁砂颗粒60份、电熔镁砂细粉30份、酚醛树脂5份、二氧化钛2份、金属锂粉2份,首先将电熔镁砂颗粒放入混炼机中干混5min,接着加入酚醛树脂,继续混合20min,然后加入二氧化钛混合5min,最后加入电熔镁砂细粉和金属锂粉继续混合10min形成泥料,连续混炼机的转速为1000 rad/min,混炼时间为20min;
(2)压制成型:将泥料加入至模具中进行压制成型,成型压力为2500KN;
(3)烘烤固化:将步骤(2)中压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖,烘烤温度为300℃,烘烤时间为10h。
实施例二:
一种镁碳砖,各组分按重量份数计为:电熔镁砂颗粒70份、电熔镁砂细粉20份、酚醛树脂8份、二氧化钛1.5份、金属锂粉1.5份,电熔镁砂颗粒大小为3mm,电熔镁砂细粉的粒度为300目。
镁碳砖的制备方法,包括如下步骤:
(1)混炼:按重量份数分别称取电熔镁砂颗粒70份、电熔镁砂细粉20份、酚醛树脂8份、二氧化钛1.5份、金属锂粉1.5份,首先将电熔镁砂颗粒放入混炼机中干混8min,接着加入酚醛树脂,继续混合15min,然后加入二氧化钛混合8min,最后加入电熔镁砂细粉和金属锂粉继续混合15min形成泥料,连续混炼机的转速为1000 rad/min,混炼时间为40min;
(2)压制成型:将泥料加入至模具中进行压制成型,成型压力为5000KN;
(3)烘烤固化:将步骤(2)中压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖,烘烤温度为200℃,烘烤时间为15h。
实施例三:
一种镁碳砖,各组分按重量份数计为:电熔镁砂颗粒75份、电熔镁砂细粉10份、酚醛树脂10份、二氧化钛1份、金属锂粉1份,电熔镁砂颗粒大小为1mm,电熔镁砂细粉的粒度为350目。
镁碳砖的制备方法,包括如下步骤:
(1)混炼:按重量份数分别称取电熔镁砂颗粒75份、电熔镁砂细粉30份、酚醛树脂5份、二氧化钛2份、金属锂粉2份,首先将电熔镁砂颗粒放入混炼机中干混10min,接着加入酚醛树脂,继续混合5min,然后加入二氧化钛混合10min,最后加入电熔镁砂细粉和金属锂粉继续混合20min形成泥料,连续混炼机的转速为900 rad/min,混炼时间为60min;
(2)压制成型:将泥料加入至模具中进行压制成型,成型压力为6000KN;
(3)烘烤固化:将步骤(2)中压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖,烘烤温度为150℃,烘烤时间为20h。
Claims (5)
1.一种镁碳砖,其特征是:各组分按重量份数计为:电熔镁砂颗粒60~75份、电熔镁砂细粉10~30份、酚醛树脂5~10份、二氧化钛1~2份、金属锂粉1~2份。
2.如权利要求1所述的镁碳砖,其特征是:所述电熔镁砂颗粒大小为1~5mm。
3.如权利要求1所述的镁碳砖,其特征是:所述电熔镁砂细粉的粒度为300~350目。
4.权利要求1所述的镁碳砖的制备方法,其特征是:包括如下步骤:
(1)混炼:按重量份数分别称取电熔镁砂颗粒60~75份、电熔镁砂细粉10~30份、酚醛树脂5~10份、二氧化钛1~2份、金属锂粉1~2份,首先将电熔镁砂颗粒放入混炼机中干混5~10min,接着加入酚醛树脂,继续混合5~20min,然后加入二氧化钛混合5~10min,最后加入电熔镁砂细粉和金属锂粉继续混合10~20min形成泥料;
(2)压制成型:将泥料加入至模具中进行压制成型,成型压力为2500~6000KN;
(3)烘烤固化:将步骤(2)中压制成型的砖坯置于干燥窑中进行烘烤得到镁碳砖,烘烤温度为150~300℃,烘烤时间为10~20h。
5. 如权利要求4所述的镁碳砖的制备方法,其特征在于:所述步骤(1)中采用连续混炼机的转速为900~1000 rad/min,混炼时间为20~60min。
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Cited By (2)
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CN110698179A (zh) * | 2019-10-15 | 2020-01-17 | 上海利尔耐火材料有限公司 | 一种高性能镁碳砖及其制备方法 |
CN114890775A (zh) * | 2022-06-02 | 2022-08-12 | 凤城市千誉钛业有限公司 | 一种钛渣冶炼矿热炉的炉衬材料及其制备方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110698179A (zh) * | 2019-10-15 | 2020-01-17 | 上海利尔耐火材料有限公司 | 一种高性能镁碳砖及其制备方法 |
CN114890775A (zh) * | 2022-06-02 | 2022-08-12 | 凤城市千誉钛业有限公司 | 一种钛渣冶炼矿热炉的炉衬材料及其制备方法 |
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