CN108840693A - 一种利用冶炼炉渣生产的浇注料及其制备方法 - Google Patents

一种利用冶炼炉渣生产的浇注料及其制备方法 Download PDF

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CN108840693A
CN108840693A CN201810966804.5A CN201810966804A CN108840693A CN 108840693 A CN108840693 A CN 108840693A CN 201810966804 A CN201810966804 A CN 201810966804A CN 108840693 A CN108840693 A CN 108840693A
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周强
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JIANGSU JIANGNENG NEW MATERIAL TECHNOLOGY Co Ltd
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Abstract

本发明属于耐火材料领域,涉及一种利用冶炼炉渣生产的浇注料及其制备方法。包括以下重量百分含量的成分:冶炼炉渣60~75%,优质铝矾土细粉10~20%,氧化铝超细粉3~7%,金属硅1~3%,纯铝酸钙水泥5~8%,硅微粉3~6%。本发明是利用冶炼炉渣经过拣选、破碎、筛选得到炉渣骨料,再与其他成分混合均匀得到。本发明一种利用冶炼炉渣生产浇注料的方法不仅使得炉渣的综合利用率大大提高,而且既减少了环境污染还获得了经济收益,加之优质的耐火材料,可适用于1200℃以下的耐火工业领域。

Description

一种利用冶炼炉渣生产的浇注料及其制备方法
技术领域
本发明属于耐火材料领域,涉及一种利用冶炼炉渣生产的浇注料及其制备方法。
背景技术
近年来,随着钢铁、铁合金及有色重金属等行业的迅速发展,炉渣作为冶炼和精炼等过程的重要产物之一,它是火法冶金过程中生成的以氧化物为主的熔体,其组成以氧化物(二氧化硅,氧化铝,氧化钙,氧化镁)为主,还常含有硫化物并夹带少量金属。并且冶炼过程产生的弃渣数量很大,如生产1吨生铁产生约0.3~1吨高炉渣,由铜精矿生产1吨阳极铜产生冶炼渣约5~6吨。因此大量的冶炼炉渣常常只能通过堆填掩埋处理,综合利用率低且污染环境。但炉渣是通过1500℃以上温度融合而成,具备一定强度,存在利用价值,因此如何将冶炼炉渣循环利用变废为宝成为急需解决的问题。
发明内容
本发明的目的是提供一种利用冶炼炉渣生产的浇注料及其制备方法,包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
本发明的目的是通过以下技术方案实现的:
一种利用冶炼炉渣生产的浇注料,包括下述重量百分含量的成分:
冶炼炉渣(粒径5~8mm、3~5mm、1~3mm、0.1~1mm) 60~75%
优质铝矾土细粉 10~20%
氧化铝超细粉 3~7%
金属硅 1~3%
纯铝酸钙水泥 5~8%
硅微粉 3~6%
本发明所述的冶炼炉渣粒径有5~8mm、3~5mm、1~3mm、0.1~1mm,不同粒径的骨料占总浇注料的比例分别为17~20%、16~20%、10~15%、17~20%。
所述的优质铝矾土细粉目数为220目。
所述的氧化铝超细粉目数为1000目。
所述的金属硅粒径为0.1-1mm。
所述的硅微粉中SiO2含量>95% 。
烧结后其各项理化指标为:
有益效果:
本发明利用冶炼炉渣生产浇注料的方法节能环保、降成本,制造工艺简单方便。实现了对冶炼矿渣的综合利用,而且通过优质的耐火原料结合便得到的浇注料,兼有优异的化学稳定性、热稳定性和耐压强度,产品性能稳定,可用于使用温度在1200℃以下的耐火工业领域。
本发明利用冶炼炉渣生产浇注料的方法提高了炉渣的综合利用水平,在综合利用炉渣的同时实现环境保护、经济和社会效益多赢目标。
具体实施方式
实施例1:
一种利用冶炼炉渣生产浇注料的方法,包括以下重量百分含量的成分:冶炼炉渣60%(粒径5~8mm17%、3~5mm16%、1~3mm10%、0.1~1mm17%),优质铝矾土细粉20%,氧化铝超细粉5%,金属硅2%,纯铝酸钙水泥8%,硅微粉5%。制备方法包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
烧结后其各项理化指标为:
实施例2:
一种利用冶炼炉渣生产浇注料的方法,包括以下重量百分含量的成分:冶炼炉渣71%(粒径5~8mm19%、3~5mm18%、1~3mm14%、0.1~1mm20%),优质铝矾土细粉10%,氧化铝超细粉4%,金属硅3%,纯铝酸钙水泥6%,硅微粉6%。
制备方法包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
烧结后其各项理化指标为:
实施例3:
一种利用冶炼炉渣生产浇注料的方法,包括以下重量百分含量的成分:冶炼炉渣63%(粒径5~8mm17%、3~5mm17%、1~3mm11%、0~1mm18%),优质铝矾土细粉15%,氧化铝超细粉7%,金属硅3%,纯铝酸钙水泥8%,硅微粉4%。
制备方法包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
烧结后其各项理化指标为:
实施例4:
一种利用冶炼炉渣生产浇注料的方法,包括以下重量百分含量的成分:冶炼炉渣70%(粒径5~8mm20%、3~5mm15%、1~3mm15%、0.1~1mm20%),优质铝矾土细粉14%,氧化铝超细粉3%,金属硅2%,纯铝酸钙水泥8%,硅微粉3%。
制备方法包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
烧结后其各项理化指标为:
实施例5:
一种利用冶炼炉渣生产浇注料的方法,包括以下重量百分含量的成分:冶炼炉渣75%(粒径5~8mm20%、3~5mm20%、1~3mm15%、0.1~1mm20%),优质铝矾土细粉10%,氧化铝超细粉3%,金属硅3%,纯铝酸钙水泥5%,硅微粉4%。
制备方法包括以下步骤:
(1)该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
烧结后其各项理化指标为:

Claims (9)

1.一种利用冶炼炉渣生产的浇注料,其特征在于包括以下重量百分含量的成分:冶炼炉渣60~75%,优质铝矾土细粉10~20%,氧化铝超细粉3~7%,金属硅1~3%,纯铝酸钙水泥5~8%,硅微粉3~6%。
2.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于冶炼炉渣得到的骨料粒径有5~8mm、3~5mm、1~3mm、0.1~1mm,不同粒径的骨料比例分别为15~20%、15~20%、15~25%、15~20%。
3.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于含有以下重量百分含量的成分:冶炼炉渣65~75%,优质铝矾土细粉10~18%,氧化铝超细粉3~7%,金属硅1~3%,纯铝酸钙水泥5~8%,硅微粉3~6%。
4.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于含有以下重量百分含量的成分:冶炼炉渣68~75%,优质铝矾土细粉12~18%,氧化铝超细粉3~6%,金属硅1~3%,纯铝酸钙水泥5~8%,硅微粉3~5%。
5.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于所述优质铝矾土细粉目数为220目。
6.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于所述氧化铝超细粉目数为1000目。
7.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于所述金属硅粒径为0.1-1mm。
8.根据权利要求1所述一种利用冶炼炉渣生产的浇注料,其特征在于所述硅微粉中SiO2含量>95% 。
9.一种利用冶炼炉渣生产的浇注料的制备方法,其特征在于包括以下步骤:
该方法采用冶炼炉渣(干渣)经过拣选、破碎、筛选得到炉渣骨料,分别得到粒径5~8mm、3~5mm、1~3mm、0.1~1mm的骨料;
(2)按照比例称取不同粒径的铝矾土细粉、氧化铝超细粉、纯铝酸钙水泥、金属硅、硅微粉与所述的炉渣骨料混合均匀即可得到浇注料。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109650921A (zh) * 2019-02-22 2019-04-19 江苏江能新材料科技有限公司 一种自流式浇注料及其制备方法
CN111747518A (zh) * 2020-07-06 2020-10-09 江西理工大学 一种铜冶炼废渣基的水处理陶粒及其制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101613211A (zh) * 2009-07-28 2009-12-30 武汉钢铁(集团)公司 一种利用废弃高炉主沟料制造的再生浇注料
CN101659556A (zh) * 2008-08-28 2010-03-03 上海梅山钢铁股份有限公司 一种石灰窑用耐磨浇注料
CN104478448A (zh) * 2014-12-03 2015-04-01 武汉钢铁(集团)公司 利用钛铁渣制备的高炉渣沟浇注料

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101659556A (zh) * 2008-08-28 2010-03-03 上海梅山钢铁股份有限公司 一种石灰窑用耐磨浇注料
CN101613211A (zh) * 2009-07-28 2009-12-30 武汉钢铁(集团)公司 一种利用废弃高炉主沟料制造的再生浇注料
CN104478448A (zh) * 2014-12-03 2015-04-01 武汉钢铁(集团)公司 利用钛铁渣制备的高炉渣沟浇注料

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109650921A (zh) * 2019-02-22 2019-04-19 江苏江能新材料科技有限公司 一种自流式浇注料及其制备方法
CN111747518A (zh) * 2020-07-06 2020-10-09 江西理工大学 一种铜冶炼废渣基的水处理陶粒及其制备方法

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