共查询到17条相似文献,搜索用时 109 毫秒
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针对露天矿汽车运输路面扬尘的危害及抑制问题,从汽车运输路面扬尘机制和抑尘原理出发,归纳总结近年来国内外路面抑尘剂研究与应用的成果和不足. 分析认为,在环境质量要求高、低成本、节能减排的时代背景下,研发抑尘有效期长、无二次污染、原料价廉、综合效益高、生产工艺简单、适用于我国多数矿山的新型复合抑尘剂是今后路面扬尘控制的发展方向. 相似文献
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渣油乳状液添加糊化淀粉的抑尘性能研究 总被引:1,自引:0,他引:1
笔者在实验室对加糊化淀粉的渣油乳状液和纯渣油乳状液的抑尘性能进行对比试验,试验表明,混合抑尘剂的抗蒸发性明显优于纯渣油乳状液,将其喷酒于扬尘路面,能有效抑制粉尘飞扬,且作用时间长,它不仅可用于路面防尘,而且可用于各类散体物料堆放场的防尘,具有较好的应用前景。 相似文献
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本文综述了国内外近二十多年来在路面工地及散体物料堆放场扬尘防治领域的各种抑尘方法及其存在问题,进而探讨了抑尘方法的发展方向。 相似文献
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为了减少露天矿山路面粉尘的产生,国内外普遍采用了喷洒水及盐水溶液的方法,并取得了一定的效果,有些国家还在此基础上研制出乳状液抑尘剂,其效果更好。目前,我国在这方面的研究和应用还很少。本文仅对其抑尘机理作一初步探讨。 相似文献
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吸湿无机盐—水系的抗蒸发性研究 总被引:3,自引:1,他引:2
本文采用直接测量溶液蒸发量的方法,对5种吸湿无机盐水溶液的抗蒸发性及其顺序进行了研究,并分析用其喷洒扬尘路面的抑尘机理,为矿区公路抑尘的实际应用提供参考。 相似文献
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非煤矿山粉尘主要来源于开采工艺等方面,利用抑尘剂除尘是矿山粉尘治理的重要手段。该抑尘剂由吸湿剂、表面活性剂等组成[1]。在对比几种吸湿剂、表面活性剂兼容性过程中优化。在道路碾压现场试验过程中,喷洒添加了抑尘剂配方溶液的粉尘含水率明显高于只喷洒清水的粉尘含水率,且保湿时间更长。在碎矿站试验中喷洒了抑尘剂溶液,空气中粉尘颗粒明显减少,粒径dp〈20μm的粉尘得到了控制,除尘率得以大幅度提高,取得了很好的抑尘效果。 相似文献
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通过对包头市路尘中14种稀土元素(rare earth elements,REEs)含量的测定分析以及小型人工降雨冲刷模拟,对稀土元素在路尘中的赋存特征及在其降雨径流中的流失特征进行了分析和探讨。结果表明,(1)路尘中的稀土元素随降雨过程发生迁移并在径流产生"流失浓缩"效应,浓缩强度随雨强增加而增强;相同雨强下,水泥下垫面的聚集效应高于沥青混凝土下垫面。(2)径流中水相稀土元素含量随降雨时间下降。(3)径流流失过程中,固相颗粒态中稀土元素的配分模式与路尘样品基本一致,呈现轻稀土富集的特征,轻重稀土之间的分馏程度较高;而水相中稀土元素的配分模式与原始路尘样品中有一定差异,轻重稀土之间的分馏程度降低。 相似文献
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PURPOSE: To evaluate the effect of topical aqueous humor suppressants on the absorption of intravitreal perfluorocarbon gases. METHODS: Sulfur hexafluoride or perfluoropropane was injected intravitreally in five rabbits. Time to gas disappearance was measured in eyes treated with topical aqueous humor suppressants and in those not treated. RESULTS: The mean time (+/- SD) to disappearance of 0.4 cc of sulfur hexafluoride was 5.6 +/- 0.9 days, which was prolonged by 43% to 8.0 +/- 0.7 days with topical aqueous humor suppressants (P = .009). The mean time (+/- SD) to disappearance of 0.2 cc of perfluoropropane was 18.4 +/- 1.9 days, which was prolonged by 55% to 28.6 +/- 2.7 days with topical aqueous humor suppressants (P = .009). CONCLUSION: Aqueous suppressants prolong sulfur hexafluoride and perfluoropropane intravitreal gas bubble duration in rabbits. 相似文献
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随着德兴铜矿近50年采区开采,矿山已多处形成了固定坑线,为利用固定坑线管路喷洒防尘创造了条件。本文针对德兴铜矿采矿场目前采区运输道路的抑尘、防尘主要是由洒水车来完成,满足不了生产的需要,提出了利用固定坑线管路喷洒防尘和洒水车喷洒相结合的措施,提高防尘效果。 相似文献
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The control of dust on construction sites is an issue of concern of many communities that experience a high level of construction activity. Dust suppression typically involves using large water trucks to spray haul roads, material stockpiles, and other areas being worked by equipment. This method of dust control leads to labor, operating, and safety costs and complications that can limit and sometimes prohibit its implementation. Other spray methods that are cost-effective, easy to implement, functionally viable, and safe are needed that provide direct and effective dust control for each piece of equipment. This paper describes a research project to develop and evaluate a water spray system for suppressing dust emissions that is attached directly to a piece of earthmoving equipment, specifically a dump truck. The system consists of distribution hose, pipe, and spray nozzles attached to the perimeter of the truck body, and a water pump and water tank secured to the truck's frame. The system's design takes into account various operational and performance factors, including water consumption rate, spray configuration, equipment function and operation, dust suppression effectiveness, and cost of installation and use. It is expected that the system developed can play an effective role in minimizing dust emissions from construction sites. 相似文献