用后镁碳砖的再生研究

Research on reproducing MgO-C brick with used MgO-C brick

以用后的废镁碳砖为原料,经过拣选、除渣、破碎、除铁、均化和水化等处理后,制成再生镁碳砖。以97%的用后镁碳砖料再生的镁碳砖的各项性能接近或达到新镁碳砖的水平;以80%的用后镁碳砖料再生的镁碳砖用在300t钢包渣线上,在有20炉次LF处理的情况下,其使用寿命达到82炉次,渣线侵蚀速度为每炉1.28mm。使用结果证明,这种再生镁碳砖达到了同期使用的由电熔镁砂和石墨为原料而生产的新镁碳砖的水平。

The MgO -C brick was reproduced taking used MgO - C brick as raw material. The used MgO - C brick must be removed adhesive objects ,such as mud, dirt, slag and iron above all, and then crushed, hydrated, deferrized and uniformed before reproducing MgO -C brick. The properties of the reproduced MgO -C brick containing 97wt% used MgO -C brick reach the level of the original MgO -C brick. The reproduced MgO -C brick produced with 80wt% used MgO -C brick is used for slagline of 300 t ladle. The ladle service life is 82 heats containing 20 heats LF treatment,which is better than original MgO -C brick. Corrosion rate of reproduced MgO-C brick is 1.28 mm/heats,and original MgO -C brick is 1.40 mm/heats.