矿冶工程
礦冶工程
광야공정
2014年
4期
79-82
,共4页
李二平%邱亚群%向仁军%成应向
李二平%邱亞群%嚮仁軍%成應嚮
리이평%구아군%향인군%성응향
脱砷%预氧化%还原工艺%球团
脫砷%預氧化%還原工藝%毬糰
탈신%예양화%환원공예%구단
arsenic removal%preoxidization%reduction process,pellet
高炉炉料要求所用球团矿砷含量低于0．08％，郴州三十六湾河道尾砂制酸硫酸渣砷含量为2．08％。本文在分析砷及含砷矿物的理化性质和研究矿物学特征的基础上，采用球团预氧化-弱还原工艺，开展铁精矿中砷的脱除研究。结果表明，在还原时间80 min，还原温度1150℃条件下，球团矿中砷的含量降低到0．101％，接近高炉生产要求。
高爐爐料要求所用毬糰礦砷含量低于0．08％，郴州三十六灣河道尾砂製痠硫痠渣砷含量為2．08％。本文在分析砷及含砷礦物的理化性質和研究礦物學特徵的基礎上，採用毬糰預氧化-弱還原工藝，開展鐵精礦中砷的脫除研究。結果錶明，在還原時間80 min，還原溫度1150℃條件下，毬糰礦中砷的含量降低到0．101％，接近高爐生產要求。
고로로료요구소용구단광신함량저우0．08％，침주삼십륙만하도미사제산류산사신함량위2．08％。본문재분석신급함신광물적이화성질화연구광물학특정적기출상，채용구단예양화-약환원공예，개전철정광중신적탈제연구。결과표명，재환원시간80 min，환원온도1150℃조건하，구단광중신적함량강저도0．101％，접근고로생산요구。
Pellets, if used as burdens for blast furnace, must be lower than 0. 08% in terms of arsenic content. However, the arsenic content is 2.08% in the slag after preparation of sulfuric acid with tailings sand from Sanshiliuwan Riverway in Chenzhou City. Based on analysis of physicochemical properties and mineralogical characteristics of arsenic and arsenic-bearing minerals, arsenic removal from iron concentrate was studied by the preoxidization-weak reduction process. Experimental results showed that controlling the preoxidization at a temperature of 1 150 ℃ for 80 min leads to the arsenic content in pellet reduced to 0.101%, which almost meet requirement for blast furnace.
