金渠金矿破碎车间除尘设备的改造及应用

选矿厂破碎车间普遍存在粉尘现象。介绍了金渠金矿破碎车间湿式除尘系统的设计、试运行及存在问题;提出了设备改造方案。改造运行效果表明,破碎车间操作岗位的粉尘浓度1mg／m^3,除尘系统排放的粉尘浓度80mg／m^3,达到了国家标准;除尘系统改造提高了除尘效率,改善了作业环境。     

对选矿厂生产性粉尘的治理措施

文章介绍了包钢选矿厂破碎车间治理粉尘污染所采用的密闭、加湿机械除尘、改造除尘器、高压静电除尘及湿式除尘等方法收到的效果。     

脉冲袋式除尘技术在铜合金加工中的应用

本文介绍了低压布袋除尘技术及在铜合金生产中产生的废气治理的应用。从广州铜材厂有限公司投人运行使用至今来看，低压布袋除尘对氧化锌粉尘有良好的除尘效果，取得了明显的环境效益和社会效益，同时取得收集的粉尘外卖和相对其它方式除尘器省电20％的节能的经济效益。     

轧钢粉尘治理技术研究

通过湿式除尘器惯性碰撞系数Ψ分析，根据轧钢粉尘特点和场地条件，研究设计轧钢粉尘治理的除尘器和除尘系统，经运行测试效果良好．     

焦化厂备煤车间的煤尘治理

采用ＬＴＨＦ１４４－５１０型机械回转反吹袋式除尘器，代替原有设备，对薛城焦化厂备煤车间的除尘系统进行更新改造，经过１年多的实际运行，粉尘排放浓度为３７．６ｍｇ／ｍ３，车间岗位粉尘浓度１．９～２．３ｍｇ／ｍ３，分别比国家排放标准降低了６２．４ｍｇ／ｍ３和８．１～７．７ｍｇ／ｍ３。     

滤简式除尘机组净化炭／炭复合材料粉尘分析

炭／炭复合材料机加工粉尘有其独特的特性,粉尘量大、收集难度大。据此,针对该材料粉尘的产生和粉尘特性进行了详细分析．并对粉尘的收集方法进行了比较。选用旋风惯性除尘和滤筒式除尘串联的除尘机组．同时对滤筒除尘工作原理及滤简材料的过滤性能作了介绍和分析。采用该除尘机组除尘,通过对排出到室外空气和车间内空气的检测,除尘效果比较理想,各项指标完全符合国家环保标准。     

滤筒式除尘机组净化炭/炭复合材料粉尘分析

炭／炭复合材料机加工粉尘有其独特的特性,粉尘量大、收集难度大。据此,针对该材料粉尘的产生和粉尘特性进行了详细分析．并对粉尘的收集方法进行了比较。选用旋风惯性除尘和滤筒式除尘串联的除尘机组．同时对滤筒除尘工作原理及滤简材料的过滤性能作了介绍和分析。采用该除尘机组除尘,通过对排出到室外空气和车间内空气的检测,除尘效果比较理想,各项指标完全符合国家环保标准。     

包钢选矿厂干雾抑尘除尘系统的应用与效果

包钢选矿厂翻车机等产尘部位由于密封困难,原除尘设备无法解决在生产过程中产生的粉尘,采用微米级干雾抑尘除尘系统便可解决这一难题。文章介绍干雾抑尘除尘系统的工作原理,分析了选矿厂粉尘特点及采用干雾抑尘除尘系统现场治理后粉尘治理效果,并与原除尘设备进行了对比。     

钨砂精选粉尘污染立体化综合治理技术

针对某矿精选车间的污染状况,分析了精选车间污染的原因,提出了需要解决的问题,开发了粉尘污染治理技术及系统,并对系统运行效果及效益进行分析。结果表明：采用立体化综合治理新技术后,钨砂精选车间粉尘污染得到有效抑制,同时大大提高了有价粉尘的收集率。     

浅谈钢铁工业粉尘的治理与回收利用

叙述了钢铁工业粉尘污染的来源和特点,以及常用的粉尘污染治理技术和粉尘回收利用途径.在除尘治理技术中重点介绍了薄膜复合滤料在微细粉尘治理应用中的优越性.     

干法煤气布袋除尘与高炉操作

叙述了3年来煤气干法布袋工艺的运行情况,结合炼铁厂的实际阐述了布袋除尘与高炉操作的关系,提出了操作要点。     

高炉喷吹除尘灰的研究

 由于高炉除尘灰含有大量的铁和碳,且其排放造成严重的环境污染,因此通过现有的喷煤系统将其作为含铁原料和含碳原料从风口喷入高炉无疑是处理除尘灰的一种有效途径。考虑到喷吹除尘灰影响到炉内炉渣的碱度、铁水的硫含量、理论燃烧温度和焦比的变化,通过高炉物料平衡和局部热平衡模型计算了焦比、炉渣碱度和理论燃烧温度随喷入除尘灰量的变化,为高炉操作提供理论依据,并进行了工业试验。结果表明,焦比和炉渣碱度随除尘灰喷入量的增加而下降,而理论燃烧温度则变化不大,这些变化可以通过调整配料来应付;喷吹除尘灰后高炉透气性略有下降,所需喷吹压力增大,试验证明高炉喷吹自身的除尘灰是可行的。     

转炉除尘污水污泥处理利用技术实践与探讨

通过对转炉除尘污水及污泥处理系统运行实践的分析，研究探讨了采取粗颗粒预分离、磁凝聚与药凝聚复合处理、保持水质稳定、污泥压榨过滤、泥浆泵送烧结以及加强操作管理等技术措施，以解决转炉污水污泥处理难题。     

硅铁浇铸时产生的无组织烟尘的治理

针对硅铁在浇铸工程中所产生的烟尘,对浇铸设施设备进行了改造,匹配相应的收尘设备,使硅铁浇注时无组织烟尘能够被有效治理,烟尘收集率达到99.98％以上,排出的粉尘浓度低于50 mg/m3,效果显著.     

Glassification of eaf dust: The limits for Fe2O3 and ZnO content and an assessment of leach performance

Electric arc furnace (EAF) baghouse dust is an environmental problem, both in terms of temporary storage and, ultimately, safe disposal. Vitrification of the dust, so that hazardous components (such as zinc, lead, chromium, cobalt, barium, and arsenic) are incorporated into an amorphous glassy structure, is one option for environmentally benign disposal (and possibly recycling), which is currently being explored commercially, in silica-based glasses at iron levels of up to 15 wt%. However, the ability of vitreous materials to resist leaching of hazardous components may be substantially reduced by components which promote crystallinity, in particular Fe, Zn, Cd, and other transition elements. In the present work the impact of Fe₂O₃ and ZnO, both individually and in combination, on the vitrification process has been studied experimentally, one objective being to determine the maximum level at which the final product remains essentially amorphous. Several compositions were prepared in the system Fe₂O₃-ZnO-CaO + MgO + Na₂O at 50 wt% SiO₂ and 1500 °C. Amorphous products were obtained at Fe₂O₃ levels up to 35 wt%, ZnO levels up to 30 wt% and total Fe₂O, + ZnO levels ranging from 25 to > 40wt% depending on the Fe₂O₃ : ZnO ratio. The addition of minor elements such as Zn, Cd and Pb at levels typical of EAF dust was found to have negligible impact on the ability to form amorphous product structures. Leaching tests carried out on samples showed very low Zn levels confirming the ability of the product from EAF glassification to pass leaching standards which might significantly reduce disposal costs. © 1997 Canadian Institute of Mining and Metallurgy. Published by Elsevier Science Ltd. All rights reserved.     

长袋低压脉冲袋式除尘器在烧结厂的应用

长袋低压脉冲袋式除尘器具有清灰能力强、喷吹压力低、过滤风速大、运行能耗低、换袋方便、维修简单等特点。针对烧结粉尘的特性 ,首次在烧结系统中使用该除尘技术 ,取得了良好的效果 ,为该技术的广泛推广应用创造了条件     

Old paint removal and blood lead levels in children

AIM: To identify risk factors, particularly paint removal and clean up practices, for elevated blood lead levels in children, 12 to 24 months old, living in Wellington city. METHODS: Children living in residences more than 50 years old, where residential paint removal had taken place in the last two years, were recruited. Care givers were interviewed, a blood sample was taken from the child's arm and a dust wipe sample was collected from the kitchen floor. Blood and dust samples were analysed for lead content. RESULTS: Data were collected for 141 children (75% of those eligible). The mean blood lead level was 0.24 mumol/L (5.06 micrograms/dL). Higher blood levels were associated with lower income of the main family earner, playing outside, eating dirt and parental hobbies involving lead use. Children receiving regular medical treatment were at lower risk of lead absorption. With the exception of paint removal involving blow torches, none of the paint removal, clean up, or disposal practices was more strongly associated than the other methods with elevated blood lead levels in children living in the household. Dust wipes from the kitchen floor had little predictive value for blood lead level. CONCLUSIONS: High temperature methods of paint removal and parental hobbies involving lead are associated with higher lead levels in children. Given the availability of alternative means of paint removal, continuing use of high temperature methods is unnecessary. Further work is needed to assess lead absorption risks associated with hobbies involving lead.     

从锌冶炼烟尘中回收银及有价金属的工艺研究

系统地研究了从台炼烟尘中回收银、锌、铅的新工艺、考察了稀硫酸浸取锌、氯盐浸取银、铅的最佳工艺参数。该工艺能有效地回收烟尘中的银、锌、铅,并具有工艺简单,综合回收率高,无污染等特点,锌、铅、银的回收率分别大于９１％,９９％和９８％。     

低压脉冲旋转反吹布袋收尘器在有色冶炼行业中的应用

目前有色冶金行业干法收尘主要以布袋收尘器为主。介绍了低压脉冲旋转反吹布袋收尘器在烟尘条件恶劣的精矿干燥、回转窑脱硫干燥收尘中的应用。生产应用对比得出,低压脉冲旋转反吹布袋收尘器具有占地小、运行维护量小、运行成本低、使用寿命长等优点。     

污水处理技术在湿式电除尘器上的设计与应用

唐钢动力能源部首次将污水处理技术应用于湿式电除尘器上,建成一套湿式电除尘器污水自循环处理系统,该系统自投产使用以来,运行稳定。湿式电除尘器污水经过这个自循环系统处理后,水中悬浮物平均含量为20 mg/L左右,达到了设计目标。