白云尾矿与转炉渣制备烧结透水砖及性能研究
Study on Preparation and Properties of Fired Permeable Brick by Baiyun Obo Tailings and Converter Slag
张佳硕 1王永斌 1彭军 1张芳 1常宏涛1
作者信息
摘要
为充分利用白云鄂博再选尾矿和包钢转炉渣,以其为原料采用高温煅烧的方式制备烧结透水砖.结果表明:选定钢渣骨料级配5～10mm∶2.5～5 mm∶0～2.5 mm=4∶3∶3,最佳方案为尾矿掺量25％,成型压力30 MPa,烧结温度1180 ℃,保温时间50 min,此时透水砖的粘结相为镁铁尖晶石相和硅酸钙相,抗压强度为28 MPa,透水系数为0.091 cm/s,均优于国标《烧结普通砖》(GB/T 5101-2017)中MU25(25 MPa)的抗压强度要求和《透水路面砖和透水路面板》(GB/T 25993-2010)中A级0.02cm/s的透水系数要求.
Abstract
In order to fully utilize the Baiyun Obo re-election tailings and the converter slag from Baotou Steel,a high-temperature calcination method was employed to prepare sintered permeable bricks using them as raw materials.The results showed that the selected aggregate grading of the steel slag is 5～10 mm∶2.5～5 mm∶0～2.5 mm=4∶3∶3.The optimal scheme included tailings content of 25％,molding pressure of 30 MPa,sintering temperature is 1180 ℃,and an insulation time of 50 minutes.At this condition,the binding phases of the permeable bricks are magnesium iron spinel phase and calcium silicate phase,exhibiting a compressive strength of 28 MPa and a permeability coefficient of 0.091 cm/s,both of which exceed the requirements of the national standard"Fired Common Bricks"(GB/T 5101-2017)for MU25(25 MPa)compressive strength and the requirements of"Permeable Paving Bricks & Permeable Paving Flags"(GB/T 25993-2010)for Grade A with a permeability coefficient of 0.02 cm/s.
关键词
白云鄂博尾矿/转炉渣/烧结透水砖/最佳工艺Key words
Baiyun Obo tailings/Converter slag/Fired permeable brick/Optimum technology引用本文复制引用
基金项目
国家重点研发计划项目(2020YFC1909100)
出版年
2024
NETL
NSTL
万方数据