D0L:10.13374h.issn1001-053x.2013.08.011 第35卷第8期 北京科技大学学报 Vol.35 No.8 2013年8月 Journal of University of Science and Technology Beijing Aug.2013 高磷鲕状铁矿酸浸脱磷 余锦涛，郭占成四，唐惠庆 北京科技大学钢铁冶金新技术国家重点实验室，北京100083 ☒通信作者，E-mail:zcguo@metall.ustb.edu.cm 摘要研究了酸浸处理高磷铁矿脱磷及其影响因素.实验用鄂西鲕状高磷矿F的质量分数为51.7%，P的质量分数约 0.5%,S的质量分数为0.34%.通过硫酸浸出，浸出矿中磷的质量分数降低至0.07%左右，而铁损只有0.18%，S的质量 分数为0.35%，满足钢铁生产的要求.通过扫描电镜观察和能谱分析表征了高磷和矿中磷的脱除，在实验酸度下能明显看 出磷灰石溶解，而铁相基本不反应，并得到了热力学计算证明.实验确定了最佳的酸浸条件：浸出时间1，液固比100 mL:8g,酸度0.2molL-1,振荡频率150Hz.通过微波加热预处理，高磷铁矿中产生微裂纹，增加了矿石的比表面积， 但是这并没有明显促进酸浸脱磷的进行.通过补酸的方式循环利用酸浸液处理高磷铁矿能得到较好的脱磷效果，脱磷率 稳定在80%，能有效减少酸耗、保护环境 关键词铁矿石：脱磷：浸出；微波加热；循环利用 分类号T℉111.3 Phosphorus removal from high phosphorus oolitic iron ore by acid leaching YU,Jim-tao,GU0Zhan-cheng☒，TANG Hui--ging State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:zcguo@metall.ustb.edu.cn ABSTRACT This paper reports the phosphorus removal of high phosphorus oolitic iron ore by acid leaching and its influence factors.The experimental ore is Exi high phosphorus oolitic iron ore with 0.5%phosphorus,51.7%iron and 0.34%sulphur.After acid leaching.the P content decreases to about 0.07%,the iron loss during acid leaching is about 0.18%,and the S content is 0.35%,which can meet the requirements of steel production.Through analyzing the ore surface before and after acid leaching by scanning electron microscopy (SEM)and energy dispersive spectrometry (EDS),it is found that apatite is almost completely dissolved,but iron oxide phase hardly reacts,which is also proved through thermodynamic calculations.The optimal experimental parameters are determined to be the leaching time of 1h,the liquid-solid ratio of 100 mL:8 g,the acid concentration of 0.2 mol-L-,and the oscillation frequency of 150 Hz. Micro cracks appear in the ore by microwave preheating,the specific area of the ore is increased,but little improvement in dephosphorization is induced during acid leaching.The recycling of the waste acid solution is feasible.Through adding fresh acid to the waste acid solution,the acid solution after treatment can leach phosphorus to the satisfied extent again.The dephosphorization rate is controlled at 80%.The recycling can reduce the cost obviously and protect the environment. KEY WORDS iron ores;phosphorus removal;leaching;microwave heating;recycling 随着全球经济的发展，钢铁产品的消耗量越来 优质矿石储量不足，需要大量进口，导致了铁矿石 越大.中国作为钢铁的生产和消费大国，由于自身 的进口价格逐年飙升，严重影响了我国钢铁行业的 收稿日期：2012-09-21 基金项目：国家自然科学基金重点资助项目(51234001)35 8 Vol. 35 No. 8 2013 8 Journal of University of Science and Technology Beijing Aug. 2013   100083 E-mail: zcguo@metall.ustb.edu.cn . Fe  51.7%P  0.5%S  0.34%.  0.07% 0.18%S  0.35%.  .   1 h 100 mL:8 g 0.2 mol·L−1  150 Hz.     .      80%  .   TF111.3 Phosphorus removal from high phosphorus oolitic iron ore by acid leaching YU Jin-tao, GUO Zhan-cheng , TANG Hui-qing State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China Corresponding author, E-mail: zcguo@metall.ustb.edu.cn ABSTRACT This paper reports the phosphorus removal of high phosphorus oolitic iron ore by acid leaching and its influence factors. The experimental ore is Exi high phosphorus oolitic iron ore with 0.5% phosphorus, 51.7% iron and 0.34% sulphur. After acid leaching, the P content decreases to about 0.07%, the iron loss during acid leaching is about 0.18%, and the S content is 0.35%, which can meet the requirements of steel production. Through analyzing the ore surface before and after acid leaching by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS), it is found that apatite is almost completely dissolved, but iron oxide phase hardly reacts, which is also proved through thermodynamic calculations. The optimal experimental parameters are determined to be the leaching time of 1 h, the liquid-solid ratio of 100 mL:8 g, the acid concentration of 0.2 mol·L−1, and the oscillation frequency of 150 Hz. Micro cracks appear in the ore by microwave preheating, the specific area of the ore is increased, but little improvement in dephosphorization is induced during acid leaching. The recycling of the waste acid solution is feasible. Through adding fresh acid to the waste acid solution, the acid solution after treatment can leach phosphorus to the satisfied extent again. The dephosphorization rate is controlled at 80%. The recycling can reduce the cost obviously and protect the environment. KEY WORDS iron ores; phosphorus removal; leaching; microwave heating; recycling   .         2012–09–21   (51234001) DOI:10.13374/j.issn1001-053x.2013.08.011