水性聚合物对铁精矿粉的抑尘和稳定作用研究

金属矿山 ›› 2019, Vol. 48 ›› Issue (09): 185-188.

水性聚合物对铁精矿粉的抑尘和稳定作用研究

苏璐璐¹，柳鹏¹，张福强^1,2，韩浩¹，杨红健¹，殷福星^2,3

1. 河北工业大学化工学院，天津 300130；2. 河北工业大学能源装备材料研究院，天津 300130；3. 天津市材料层状复合与界面控制技术重点实验室，天津 300130

出版日期:2019-09-15 发布日期:2019-10-10
基金资助:
基金项目：河北省科技计划项目（编号：17273703D），天津市科技计划项目（编号：16ZXCXSF00010）。

Study on Suppressing and Stabilizing Effect of Water-based Polymers on Iron Concentrate Powder

Su Lulu¹，Liu Peng¹，Zhang Fuqiang^1,2，Han Hao¹，Yang Hongjian¹，Yin Fuxing^2,3

1. School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China;2. Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin 300130, China;3. Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Tianjin 300130, China

Online:2019-09-15 Published:2019-10-10

摘要/Abstract

摘要： 为控制铁精矿粉的扬尘排放，研究了水性聚合物抑尘剂对研山铁精矿粉化学组成、晶体结构、Zeta电位、SEM表面形貌和含水率的影响，讨论了湿润状态下的抑尘效率和干燥状态下的稳定作用。结果表明，抑尘剂通过交联和氢键促进颗粒物聚集，提高铁精矿粉的保湿能力，降低风力侵蚀性。聚合物用量为0.5%时，30 ℃、35%相对湿度下的平均含水率比洒水提高了1.4倍，9.5 m/s风速下装卸过程和露天堆场估算的抑尘效率分别达到71.43%和94.86%。聚合物提高了团聚体的内聚力，28 d压缩强度为0.91 MPa，是洒水样品的10.6倍。以致密的聚集体表面封闭粉体，节约水资源，可实现半年以上的有效抑尘。抑尘剂未引入有害因素和杂质，对铁精矿粉的原料品质无不良影响，不影响后续使用。

关键词: 铁精矿粉, 扬尘, 露天堆场, 悬浮颗粒物, PM2.5, 抑尘剂, 节水

Abstract: To control the dust emission of iron concentrate powder, chemical components, crystal structure, Zeta potential, SEM morphology and moisture content of Yanshan iron ore concentrate powder were investigated with water-based polymers dust suppressant. The suppressing efficiency in wet and stabilizing effect in dry were discussed. The results showed that dust suppressant promoted agglomeration of particles via crosslinking and H-bonding, improved the moisturizing ability of iron concentrate powder and thus effectively reduced wind erosion. At the temperature of 30 ℃, relative humidity of 35% and polymer dosage of 0.5%, the average moisture content was increased by 1.4 times compared with watering, and at wind rate of 9.5 m/s, the estimated suppressing efficiency in handling and open yard reached 71.43% and 94.86%, respectively. Cohesive forces of aggregates enhanced by polymers, and compressive strength was 0.91 MPa after 28 d, which was 10.6 times of the watering samples. Iron concentrate powder was sealed with dense aggregates surface, which saved water and suppressed dust over half a year. No harmful elements and impurities were induced by polymers. No adverse impacts which influences the future use were caused for the quality of iron concentrate raw materials.

Key words: Iron concentrate powder, Dust emission, Open yard, Suspended particles, PM2.5, Dust suppressant, Water saving

苏璐璐, 柳鹏, 张福强, 韩浩, 杨红健, 殷福星. 水性聚合物对铁精矿粉的抑尘和稳定作用研究[J]. 金属矿山, 2019, 48(09): 185-188.

SU Lu-Lu, LIU Peng, ZHANG Fu-Qiang, HAN Hao, YANG Hong-Jian, YIN Fu-Xing. Study on Suppressing and Stabilizing Effect of Water-based Polymers on Iron Concentrate Powder[J]. Metal Mine, 2019, 48(09): 185-188.

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