含锌铅粉尘配碳球团中氧化铁还原动力学

在氮气气氛和１０５０～１３００℃温度范围内，采用化学分析方法研究了还原温度、过量碳及煤粉粒度对含锌铅粉尘配碳球团中氧化铁还原速率的影响．结果表明：还原温度对氧化铁还原速度有显著影响，过量碳和煤粉粒度对还原速率没有影响．在不同还原程度和还原温度下，得出了氧化铁还原的表观活化能，由活化能结果和还原动力学模型对实验结果进行分析，确定了氧化铁在不同还原程度和还原温度下的还原限制性环节．     

高炉瓦斯灰的无害化处理及综合利用

韶钢集团公司自１９８８年开始，自选课题，通过５年时间的研究，摸索出了对高炉瓦斯灰进行火法富集—湿法处理的无害化处理工艺，获得了成功，建立了一套完整的活性氧化锌生产线，取得了一定的效益。     

烟草除尘过程中节能减排优化研究

使用全面试验法,对除尘风机的空转时间进行研究,分析了风机空转的原因,并通过增加"制丝需求启动信号"逻辑控制建立了切丝工序与除尘风机的联动程序。本研究对企业产生了一定的经济效益,并可为同领域其他方面的节能减排提供参考和方法。     

云锡矿山井下粉尘浓度统计分析

本文采用数理统计方法,对各作业的粉尘浓度及分布:不同工艺的粉尘浓度与分布:全年各月粉尘浓度、历年粉尘液度的分布等进行了统计,并分析其差异性,提出了降尘措施。     

高频电源在800Mw机组电除尘器上的应用

神华国华绥中发电有限责任公司1号机组由俄罗斯引进,电除尘器阴极控制系统采用俄供配套。随着投运时间增长,阴极控制系统日趋老化,电参数较低,烟尘排放浓度不能达到国家环保要求。2011年,对1号机组电除尘器阴极控制系统进行改造,采用了先进的高频电源,取得了很好的效果。     

A new design of foaming agent mixing device for a pneumatic foaming system used for mine dust suppression

To overcome the drawbacks of the conventional foam technology used for dust suppression,including large pressure loss,high water pressure and low driving pressure,a new pneumatic foaming system is introduced.Then an original design of foaming agent mixing device is proposed,and its performance is investigated and evaluated under different pressure compensations.Experimental results show that the maximum absorption amount increases by 2.9-6.7 times at a pressure compensation of 0.04-0.2 MPa compared with no pressure compensation.The pressure loss and pressure fluctuation both reduce significantly with increasing pressure compensation.The critical outlet pressure increases by30.4-240%.Field application indicates that the proposed mixing device ensures the reliable addition of foaming agent used for foam dust suppression.The effect of foam on dust suppression is remarkable,and the economic cost of foam is low.Therefore,there is reason to believe that the new mixing device will greatly promote foam technology to be widely used for suppressing dust in underground coal mines.     

A comparative study of dust control practices in Chinese and Australian longwall coal mines

Mine dust is one of the main hazards in underground longwall mines worldwide.In order to solve the mine dust problem,a significant number of studies have been carried out regarding longwall mine dust control,both in China and Australia.This paper presents a comparative study of dust control practices in Chinese and Australian longwall mines,with particular references to statutory limits,dust monitoring methods and dust management practices,followed by a brief discussion on the research status of longwall mine dust control in both countries.The study shows that water infusion,face ventilation controls,water sprays,and deep and wet cutting in longwall shearer operations are commonly practiced in almost all underground longwall mines and that both Chinese and Australian longwall mine dust control practices have their own advantages and disadvantages.It is concluded that there is a need for further development and innovative design of more effective dust mitigation products or systems despite the development of various dust control technologies.Based on the examinations and discussions,the authors have made some recommendations for further research and development in dust control in longwall mines.It is hoped that this comparative study will provide beneficial guidance for scholars and engineers who are engaging in longwall mine dust control research and practice.     

粉尘爆炸风险因子分析

基于人机工程原理,从人、机、环境、管理四类因素着手,分析涉及粉尘爆炸场所危害程度的影响因子,得出12个二级影响因子和44个三级影响因素,建立了粉尘爆炸场所风险的层次;提出了基于层次分析评价的粉尘爆炸风险因子评价模型,并对其权重进行分析,得出企业发生粉尘爆炸的风险的主次因素,着重分析了防爆措施和检测系统因素对评价模型中权重的影响,进一步验证采取正确的防爆措施和技术防范,可降低或减缓粉尘爆炸风险等级,减少粉尘爆炸事故。     

How relevant are engineering samples in the management of personal dust exposure?

A directive, legislated by the South African Department of Minerals and Energy(DME) in 1997, was introduced to reduce the dust exposures of continuous miner(CM) operators to below 5 mg/m3, when measured at the operator's cab position. The focus of this paper is to review the effectiveness of observing this rule for almost two decades and discuss industry perceptions arising from the application of this rule. The results have demonstrated that the engineering sample cannot predict the personal shift dust exposure of a CM operator. Therefore, it is recommended that the engineering sampling, as currently practiced,should be reviewed with the objective to discontinue and replace it by the approved PDM3700 realtime dust monitor.     

56m~2电除尘器气流分布及气密性测定分析

本文介绍了贵溪冶炼厂新增备料 ５６ｍ~２电除尘器气流分布及气密性测定分析的方法及过程,指出对新建或大修改造后的电除尘器,在投产前进行气流分布及气密性现场测试调整的必要性。