CAJ | 학술논문

以用后镁碳砖为原料制备转炉冶炼终渣改质剂，分析不同粒度回收料的化学成分，研究改质剂配料组成选择以及物料配比对改质剂强度的影响，优化用后镁碳砖基改质剂的配料组成。结果表明，用后镁碳砖回收料粒度不同，其氧化镁及碳含量差别较大，以用后镁碳砖为原料制备改质剂时，粒度为＜0．1、0．1～0．6、0．6～1 mm的镁碳砖细粉配比应为3∶4∶3，菱镁石粒度应为1～3 mm ；在用后镁碳砖及菱镁石的镁质原料组成下，改质剂的强度随水量的增加而增大、随黏结剂用量的增加而降低；优化后的用后镁碳砖基改质剂的配料组成为：60．2％的用后镁碳砖、25．7％的菱镁石、10％的石墨粉、0．1％的黏结剂以及10％的水。
이용후미탄전위원료제비전로야련종사개질제，분석불동립도회수료적화학성분，연구개질제배료조성선택이급물료배비대개질제강도적영향，우화용후미탄전기개질제적배료조성。결과표명，용후미탄전회수료립도불동，기양화미급탄함량차별교대，이용후미탄전위원료제비개질제시，립도위＜0．1、0．1～0．6、0．6～1 mm적미탄전세분배비응위3∶4∶3，릉미석립도응위1～3 mm ；재용후미탄전급릉미석적미질원료조성하，개질제적강도수수량적증가이증대、수점결제용량적증가이강저；우화후적용후미탄전기개질제적배료조성위：60．2％적용후미탄전、25．7％적릉미석、10％적석묵분、0．1％적점결제이급10％적수。
With wasted MgO‐C bricks as the raw material ,converter final slag modifier was developed . Chemical compositions of wasted magnesia‐carbon bricks with different particle sizes were analyzed .In order to optimize the formulation of wasted MgO‐C brick‐based modifier ,the selection of starting ma‐terials and its effect on the strength of slag modifier were studied .The results show that different sizes of recycled MgO‐C brick material have different contents of magnesium oxide and carbon .When pre‐paring the slag modifier with wasted MgO‐C bricks ,the mass ratio of its fine powder with particle size<0 .1 mm ,at 0 .1~0 .6 mm and at 0 .6~1 mm should be 3∶4∶3 and the grain size of magnesite should be 1~3 mm .The strength of slag modifier increases with the increment of water content and decreases with increasing binder content .The optimized formula for the preparation of wasted MgO‐C brick‐based slag modifier is 60 .2% of wasted magnesia‐carbon bricks ,25 .7% of magnesite ,10% of flake graphite ,0 .1% of binder and 10% of water ,respectively .