水性聚合物寚w__的抑尘和稳定作用研I?矿业114|?/title> <meta name="renderer" content="webkit|ie-comp|ie-stand" /> <meta name="keywords" content="铁精矿粉 扬尘 露天堆场 悬Q颗粒?PM2.5 抑尘?节水" /> <meta name="description" content="为控刉__的扬尘排放Q研I了水性聚合物抑尘剂对研山铁精矿粉化学l成、晶体结构、Zeta ?位、SEM表面形貌和含水率的媄响,讨论了湿润状态下的抑效率和q燥状态下的稳定作用。结果表明,抑尘剂?q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?.5%Ӟ30 ℃?5%?Ҏ度下的^均含水率比洒水提高了 1.4 倍,9.5 m/s 风速下装卸q程和露天堆Z的抑尘效率分别辑ֈ 71.43% ?94.86%。聚合物提高了团聚体的内聚力Q?8 d 压羃强度?0.91 MPaQ是z水样品?10.6 倍。以致密的聚集体?面封闭粉体,节约水资源,可实现半..." /> <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" /> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <!-- medicom style --> <link rel="stylesheet" type="text/css" href="/resource/website/article/Content/css/flexslider.css" /> <link href="/resource/website/article/Content/css/style.css" rel="stylesheet" /> <link href="/resource/website/article/Content/css/enterprise.css" rel="stylesheet" /> <script src="/library/JavaScriptOpt.js"></script> <script src="/website_template/edition3/content/js/download.js"></script> <script src="/library/jquery/js/jquery-1.9.1.js"></script> <script src="/library/jquery/js/jquery-ui-1.10.3.custom.min.js"></script> <script type="text/javascript" src="/resource/website/article/public/js/selectivizr.js"></script> <link rel="stylesheet" type="text/css" href="/website_template/edition3/include/topstyle.css" /> <script> (function () { var bp = document.createElement('script'); 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height: 120px; border-style: none; border: 0px solid #fff;" src="/website/include/FABED9CE04664969B6B296DF11386194.html"></iframe> <!-- 文章 start--> <div class="container"> <div class="enterprise-info-box"> <div class="enterprise-info-category-descr"> <img src="/resource/website/article/Content/img/enterprise-info-category-descr.jpg" /> <a href="/index.html">首页</a> >> <a href="/website/article/11/index.html">文献频道</a> >> <a href="/website/article/1110/index.html">矿业论文</a> >> 正文 </div> <div class="enterprise-info-mainbody"> <span id="id" style="display: none;">68DA1C34B39D47B892CBEE4B8CD905A2</span> <div class="title">水性聚合物寚w__的抑尘和稳定作用研I?/div> <div class="sub-title">2019-09-29</div> <!-- D start --> <div class="introduction"> 为控刉__的扬尘排放Q研I了水性聚合物抑尘剂对研山铁精矿粉化学l成、晶体结构、Zeta ?位、SEM表面形貌和含水率的媄响,讨论了湿润状态下的抑效率和q燥状态下的稳定作用。结果表明,抑尘剂?q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?.5%Ӟ30 ℃?5%?Ҏ度下的^均含水率比洒水提高了 1.4 倍,9.5 m/s 风速下装卸q程和露天堆Z的抑尘效率分别辑ֈ 71.43% ?94.86%。聚合物提高了团聚体的内聚力Q?8 d 压羃强度?0.91 MPaQ是z水样品?10.6 倍。以致密的聚集体?面封闭粉体,节约水资源,可实现半... </div> <!-- D start --> <!-- 正文 --> <div class="mainbody"> <div style="display:none"> Series No. 519 ? ? ? ? ȝ 519 ? September 2019 METAL MINE 2019 q第 9 ? 水性聚合物寚w__的抑尘和稳定作用研I? 1 1 1,2 1 1 2,31 DL? 苏璐? ? ? 张福? ? ? 杨红? Q? 1. 沛_工业大学化工学院Q天z?300130Q?. 沛_工业大学能源装备材料研究院,天| 300130Q? 3 . 天|市材料层状复合与界面控制技术重点实验室Q天z?300130Q? ??为控刉__的扬尘排放Q研I了水性聚合物抑尘剂对研山铁精矿粉化学l成、晶体结构、Zeta ? 位、SEM 表面形貌和含水率的媄响,讨论了湿润状态下的抑效率和q燥状态下的稳定作用。结果表明,抑尘剂? q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?0.5%Ӟ30 ℃?5%? Ҏ度下的^均含水率比洒水提高了 1.4 倍,9.5 m/s 风速下装卸q程和露天堆Z的抑尘效率分别辑ֈ 71.43% ?94.86%。聚合物提高了团聚体的内聚力Q?8 d 压羃强度?0.91 MPaQ是z水样品?10.6 倍。以致密的聚集体? 面封闭粉体,节约水资源,可实现半q以上的有效抑尘。抑剂未引入有宛_素和杂质Q对铁精矿粉的原料品质无 不良影响Q不影响后箋使用? 关键?铁精矿粉 扬尘 露天堆场 悬Q颗粒?PM2.5 抑尘?节水 中图分类?X513QTD926 文献标志?A 文章~号 1001-1250Q?019Q?09-185-04 DOI 10.19614/j.cnki.jsks.201909030 Study on Suppressing and Stabilizing Effect of Water-based Polymers on Iron Concentrate Powder 1 1 1,2 1 1 2,32 Su Lulu Liu Peng Zhang Fuqiang Han Hao Yang Hongjian Yin Fuxing Q?. 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, ChinaQ? Abstract To control the dust emission of iron concentrate powder, chemical components, crystal structure, Zeta poten? tial, SEM morphology and moisture content of Yanshan iron ore concentrate powder were investigated with water-based poly? mers 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 poly? mer 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 forc? es of aggregates enhanced by polymers, and compressive strength was 0.91 MPa after 28 d, which was 10.6 times of the water? ing 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. Keywords Iron concentrate powder, Dust emission, Open yard, Suspended particles, PM2.5, Dust suppressant, Water saving 在铁__的装卸、搬q和露天存放q程中,? 业机械和自然风力的卷扬容易生扬。扬造成 的铁__损耗不仅给企业带来直接的经损失, LQ因而煤炭行业抑效果较好的z水抑尘抑尘 Q?-7Q? 剂ƈ不能有效地提高铁__微_的内聚?。氯 化钙和硅酔R虽然对粒度小?10 μm 的铁_颗粒 的抑效率达?85%Q但q些药剂寚w属有腐蚀? Q?-3Q? 而且污染I气、水体和土地 ? ׃铁精矿粉颗粒h电,而煤炭粉颗_不 2 用,且严重媄响植物的生长Q而且 SiO 不利于高炉冶 收稿日期 2019-08-10 基金目 沛_省科技计划目Q编P17273703DQ,天|市科技计划目Q编P16ZXCXSF00010Q? 作者简?苏璐?1994?Q女Q硕士研I生。通讯作?张福?1965?Q男Q教授? · 185 · ȝ519? ? ? ? ? 2019q第9? Q? 8Q? ?。因此,研究适合铁精矿粉抑尘的高效、环保、低 成本抑尘剂具有现实意义? 3 试验l果与讨? 3. 1 湿抑作? 沛_工业大学化工学院研制ZU水性聚合物 抑尘剂,Ҏ了其水溶液对微细_铁__的抑尘 效果与生产现场常采用的洒水抑效果的差异。ƈ 通过Zeta 电位、SEM和抗压强度等分析手段Q表征了 水性聚合物抑尘剂在抑制铁精矿粉扬尘中的作用? 3. 1. 1 静置旉对试验原料含水率的媄? z水管有效旉短,但依然是抑制试验原料 Q? 7Q? 扬尘的常见措施,其中关键指标是含水率 。图1? 30 ℃?5%相对湿度下试验原料含水率的变化情c? 1 试验原料与水性聚合物抑尘剂的合成 1 . 1 试验原料 ׃风力扬尘的主要颗_粒度ؓ-200 目,参照 Q? 9Q? 国环保局 AP-42 Ҏ Q选用研山铁精矿粉? ?200 目粒Uؓ试验原料Q其主要矿物成分为磁? 矿,-30 μm以下_的质量分Cؓ38.92%? 1 . 2 水性聚合物抑尘剂的合成 醋酸乙烯、丙烯酸丁酯、丙烯酸和丙烯酸乙? 单体通过q加料方式合成乳白色醋丙^液类水? 从图1可以看出Q(1Q喷z抑剂后,试验原料q? 燥较慢,含水率始l高于洒水样品。(2Q至完全q燥Q? x挥发辑ֈqQ用抑剂需?.5 hQ对应的? ???2.19% Q洒 ??需 3.5 hQ对 ?????? Q?0Q? 聚合物抑剂 Q其105 ℃固含量?9.7%QpH=6.7? 2 试验Ҏ 2 . 1 含水率试? 初始质量ؓ 20.0 g 的试验原料置?ϕ 100 mm 0.85%。因此,抑尘剂有利于减少水分蒸发? 培养皿中Q喷z?5.0 g 度?2.0%的水性聚合物抑尘 剂水溶液或蒸馏水Q测?0 ℃?5%相对湿度下某一 时刻的样品质量,q计含水率? 3 . 1. 2 露天堆场的抑效? 在露天存放过E中Q铁__尽处于静态,? 焉力R蚀也会D扬尘。根据刘琴徏立的排放? 2 . 2 Zeta电位 Q?2Q? Q在风速ؓ 9.5 m/s 下,z水的铁__扬量 ? 用试验原料配制浓度ؓ0.1%的悬液Q以Nano- ?41.35 gQ? kg·hQ,使用抑尘剂对应的扬尘量ؓ 2.13 gQ? kg·hQ,卛_露天堆场而言Q抑剂相对z水的抑 效率ؓ94.86%。因此,在露天堆ZQ抑剂可以 高效抑制铁精矿粉的扬? ZS90 型电位分析A定 Zeta 电位Q研I水性聚合物 抑尘剂与试验原料颗粒间的怺作用? 2 . 3 形貌分析 表面喷z抑剂的铁__在室温下干燥? 3 . 1. 3 装卸q程的抑效? 喷金制样Q以 Nova Nano SEM450 型电镜观察该样品 的表面Ş貌,分析水性聚合物抑尘剂对试验原料? _状态的影响? 铁精矿粉在装卸和堆取q程中,_体自由降落 的冲d、物料与I气的摩擦力以及作业机械的剪 切力都可能导致扬。由于因素复杂,环境U学? 域通常采用l验模型估算扬尘的排N。根据环? 2 . 4 压羃强度 ?220.0 g 试验原料?55.0 g 度?2.0%的抑? Q? 11Q? 部徏议用的模型 Q在风速ؓ 9.5 m/s 情况下装? 铁精矿粉Q抑剂相对z水的抑效率ؓ 71.43%? 因此Q在装卸q程中,抑尘剂可以有效抑刉__? 的扬? 剂溶液؜合均匀Q在规格?40 mm´40 mm´40 mm ? 铜模具内成型、脱模,室温下干燥。依《GB 17671- 1999水惔胶砂强度验方法(ISO法)》测试不同龄? 试块的抗压强度,研究聚合物对试验原料的增Z 用。作为对比,使用{质量蒸馏水重复以上操作? 3. 2 q燥状态下的稳定作? 3. 2. 1 Zeta电位 铁矿水溶性低Q在中性水介质中以固态Ş? 存在。由于试验原料表面呈正电性,在不同抑剂 度的水溶液中的Zeta电位见图2? 2 . 5 X线衍射分析 ?200 目粒U的试验原料用研钵进一步磨l? 后,采用 Bruker-D8 Focus X 线衍射仪(XRDQ测? 抑尘剂对铁精矿粉晶体l构的媄响,以确保其品质 的安全性? 由图2可以看出Q试验原料在U水中的Zeta电位 ?18.4 mVQ随着抑尘剂浓度的升高Q试验原料的 · 186 · 苏璐璐等Q水性聚合物寚w__的抑尘和稳定作用研I? 2019q第9? 低风力R蚀Q可实现q燥矿堆的稳定,有效抑尘长达 半年以上Q摆脱对含水率的依赖Q可实现节约水资? 的目标。与之相对,z水矿堆q燥后粉体颗_界面清 晎ͼ堆积体表面颗_松散,颗粒间无l合力可aQ表? 水的聚集能力低且有可逆性,抑尘能力难以持久? 3 . 2. 3 抑尘铁精矿粉的强? 不同龄期抑尘原料试块的抗压强度见?? Zeta电位显著下降Q说明聚合物抑尘剂在试验原料? 面发生了化学吔RQ主要是聚合物羧Z颗粒表面 3 + Q?Q? ?Fe 发生了交联反?Q聚合物抑尘剂的度增大 ?0.5%Q试验原料的 Zeta 电位下降x低点-51.7 Q? 13Q? mVQ铁__的分散性不断提?Ql增大抑剂 的浓度,颗粒水化层的负电荷阻进一步吸附,Zeta 电位反而小q上升? 3 . 2. 2 铁精矿粉团聚体的表面形貌 q燥q程中试验原料的含水率不断降低,铁 Q? 从图 4 可以看出Q随着q燥q程水分的蒸发,? L的减,水的内聚作用昄Q抑剂试块和洒? 试块 7 d 的抗压强度分别ؓ 1.19 MPa ?0.34 MPaQ表 明抑剂有利于提高原料试块的强度。龄期的l箋 廉Q试块含水率持箋下降Q其内聚作用逐渐丧失Q? z水试块 28 d 的抗压强度降?0.086 MPaQ由于抑? 剂聚合物的交联和氢键作用Q抑剂试块的抗压强 度仅幅下降Q?8 d 天的抗压强度?0.91 MPaQ是z? 矉K_水化层?OH 度逐渐降低Q聚合物抑尘? 3 + 的羧Z Fe 发生交联反应Q与 Fe—OH、Si—OH? Q?4Q? Al—OH 的氢键作用不断增?Q磁铁矿颗粒怺? 集、密实堆砌,间隙~小Q水挥发因此变慢。与z纯 Q?5Q? ? 水不同,聚合物抑制剂可以聚集-10 μm的细颗粒 ?3 验原料在抑尘剂溶液或U水q燥后集 合体表面的微观Ş貌? Q?0Q? ? 水试块的10.6倍,以抵M八风力的R蚀 . 3 抑尘剂对试验原料品质的媄? ?验原料喷z抑剂前后的XRD图谱? 3 从图5可以看出Q试验原料喷z抑剂前后均仅 可见 Fe 的特征衍峰Q表明抑剂只能与颗_表 3 O 4 面的铁原子和溶液dl合Q不能进入磁铁矿晶格Q? 因而不影响铁精矿粉的结构? 从图 3 可以看出Q抑剂溶液完全q燥后,_体 颗粒怺胶结QŞ成了qx、致密的表面闭层。因 此,在没有h为破坏的情况下,用篷布遮盖矿堆以? 4 l?? Q?Q喷z抑剂水溶液有利于延缓铁精矿粉? · 187 · ȝ519? ? ? ? ? 2019q第9? and PM10 from open storage piles in ChinaQCQ?/2018. 3Q?Sarkar AQShekhar S. Iron contamination in the waters of Upper Ya? muna basinQJQ? Groundwater for Sustainable DevelopmentQ?018Q? :421-429. 4Q?Xi ZQJin LQRichard Liew J YQet al. Characteristics of foam sol q燥速度Q且含水率始l高于洒水样品;水分挥发? qQ用抑剂情况下需?.5 hQ对应的含水率ؓ Q? 2 .19%Q洒水仅需 3.5 hQ对应的含水率ؓ 0.85%Q即? 剂有利于减水分蒸发? 2Q根据经验模型,露天存放的铁__在风? 7 Q? Q? clay for controlling coal dustQJQ? Powder TechnologyQ?018Q?35: 401-408. ?.5 m/s下,z水扬尘量ؓ41.35 gQ? kg·hQ,使用抑尘 剂的扬尘量ؓ 2.13 gQ? kg·hQ,卛_露天堆场而言Q抑 剂相对z水的抑效率高?94.86%Q铁__的 装卸和堆取过E中Q在风速ؓ9.5 m/s下,抑尘剂相? z水的抑效率ؓ71.43%? Q? 5Q?Inyang H IQBae SQPando M A. Contaminant dust suppression ma? terials:A cost- effectiveness estimation methodologyQJQ? Measure? mentQ?016Q?3:563-571. Q? 6Q?Quast K. The use of Zeta potential to investigate the interaction of oleate on hematiteQJQ? Minerals EngineeringQ?016Q?5:130-137. Q?Q?Copeland C RQKawatra S K. Design of a dust tower for suppression of airborne particulates for iron makingQJQ? Minerals EngineeringQ? Q?Q在一定范围内提高抑尘剂溶液的度Q试? 原料?Zeta 电位显著下降Q抑剂在试验原料表? 2 011Q?3Q?1459-1466. 发生了化学吸附,主要是聚合物基与颗_表面的 Q?Q?Srivastava UQKawatra S KQEisele T C. Study of organic and inor? 3+ Fe 发生了交联反应,有利于抑刉__的扬尘? ganic binders on strength of iron oxide pelletQJQ? Metallurgical & Materials Transactions BQ?013Q?Q?1000-1009. Q?Q抑剂溶液完全q燥后,_体颗粒怺? l,形成了^整、致密的表面闭层。在没有Zؓ? 坏的情况下,用篷布遮盖矿堆以降低风力侵蚀Q可? 现干燥矿堆的E_Q有效抑长辑֍q以上,摆脱? 含水率的依赖Q可实现节约水资源的目标。与之相 对,z水矿堆q燥后粉体颗_界面清晎ͼ堆积体表? 颗粒松散Q颗_间无结合力可言Q表明水的聚集能? 低且有可逆性,抑尘能力难以持久? Q?Q?US EPA. Emission factor documentation for AP-42:section 13.2.2 unpaved roadsQRQ? Research Triangle ParkQNC:Measurement Poli? cy Group Office of Air Quality Planning and StandardsQ?011. Q?0Q?佟云华,刘永刚,苏璐璐,{? VAcpx寚w路Q的_接 作用QJQ? 中国胶粘剂,2018Q?1Q?21-23Q?6. Tong YunhuaQLiu YonggangQSu LuluQet al. Adhesion of VAc co? polymer emulsion to road floating dustQJQ? China AdhesivesQ?018 Q?1Q?21-23. Q? 11Q?中华人民共和国环境保护部. 扬尘源颗_物排放清单~制技? 指南Q试行)QEB/OLQ?Q?014-12-31QE2018-12-21Q?http://www. mee.gov.cn/gkml/hbb/bgg/201501/020150107594588131490. Q?Q随着q燥q程水分的蒸发,游离水的减少Q? 水的内聚作用昄Q抑剂试块和洒水试? d的抗 压强度分别ؓ1.19 MPa?.34 MPaQ表明抑剂有利 于提高原料试块的强度。龄期的l箋廉Q试块含 水率持箋下降Q其内聚作用逐渐丧失Q洒水试?28 d 的抗压强度降?0.086 MPaQ由于抑剂聚合物的? 联和氢键作用Q抑剂试块的抗压强度仅幅下降Q? Q?2Q??? 铁精矿粉污染的试验研究QJQ? 武汉水运工程学院? 报,1986Q?Q?69-75. Liu Qin. Experimental study on iron concentrate dust pollution. Journal of Wuhan University Water Transportation Engineering. 1 986Q?Q?69-75. Q?3Q?Haselhuhn HQKawatra S K. Flocculation and dispersion studies of 28 d天的抗压强度?.91 MPaQ以抵御八U风力的 iron ore using laser scattering particle size analysisQJQ? Minerals & Metallurgical ProcessingQ?015Q?Q?191-195. 侵蚀? Q? 6QXRD分析表明Q抑剂只能与原料颗_表? Q?4Q?Quaicoe IQNosrati AQAddai M J. Influence of binder composition on hematite-rich mixed minerals agglomeration behavior and prod? uct propertiesQJQ? Chemical Engineering Research and DesignQ? 的铁原子和溶液离子结合,不能q入铁矿晶|? 而不影响铁精矿粉的结构? 2 015Q?7:45-56. Q? 15Q?Mendez J MQAimar S BQBuschiazzo D E. PM10 emissions from ag? ???? gregate fractions of an Entic Haplustoll under two contrasting till? age systemsQJQ? Aeolian ResearchQ?015Q?9:195-201. Q? 1Q? ? 毅,?? 钢铁企业环保型料存方式的特点及比? Q? 16Q?朱雪梅,郝雅? q口含铁物料Z废物l合表征及来源分? QJQ? 宝钢技术,2015Q?Q?45-49. QJQ? 冉分析Q?017Q?Q?17-24. Zhang YiQLi Gang. Features and comparison of storage of environ? mental- friendly stock yard for iron and steel enterpriseQJQ? Bao? steel TechnologyQ?015Q?Q?45-49. Zhu XuemeiQHao Yaqiong. Comprehensive characterization and source analysis for solid waste of imported iron-containing materials QJQ? Metallurgical AnalysisQ?017Q?Q?17-24. Q?Q?Cao YQLiu TQHe J. 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