CAJ | 학술논문

在用湿法冶金工艺从电炉炼钢烟尘中提高氧化铁纯度的研究领域中，除硅及除铝是主要技术难点。本文研究了影响除硅及除铝的各种因素，通过选取低浓度硫酸(3.5mol*dm-3)酸浸烟尘，多次陈化，控制中和沉淀过程中的反应温度，中和速度，终点pH值(3.2～3.3)及高温煅烧(900℃)，将产品中的硅含量降至0.005%以下，铝含量降至0.035%以下，Fe2O3纯度达到99.2%以上，达到了HG/T2574-94标准中优等品水平。
재용습법야금공예종전로련강연진중제고양화철순도적연구영역중，제규급제려시주요기술난점。본문연구료영향제규급제려적각충인소，통과선취저농도류산(3.5mol*dm-3)산침연진，다차진화，공제중화침정과정중적반응온도，중화속도，종점pH치(3.2～3.3)급고온단소(900℃)，장산품중적규함량강지0.005%이하，려함량강지0.035%이하，Fe2O3순도체도99.2%이상，체도료HG/T2574-94표준중우등품수평。
n the field of the extraction of high purity Fe2O3 from electric arc furnace (EAF) dust by means of hydro-metallurgical technology,Si and Al elimination seems to be the major obstacle.In this paper,the factors that influence the effect of Si and Al elimination has been discussed.The technological conditions are as follows:the dust is leached with low density H2SO4(3.5M),aging for certain time,controlling the temperature and rate of neutralization and the terminal pH value(3.2～3.3) as well,and at last,roasted at 900℃.In the product Fe2O3,the content of Si is below 0.005%,Al below 0.035%,the purity of Fe2O3 has reached 99.2%.The quality of Fe2O3 powder has reached the standard of high-grandard in HG/T2574-94.