Wetting agent investigation for controlling dust of lead-zinc ores

The purpose of this project is to control the pollution of dust,which occurred in a typical lead-zinc mine.Two kinds of surfactants and water glass were chosen as the wetting agents to study the behaviours of suppressing the dust.The performances of the wetting agents of various sizes and water content of dust and their compositions among different weting agents were investigated. Firstly,the chemical compounds,dispersity,water content,bulk density and other relevant physico-chemical properties of the choiced dust of lead-zinc ore were mensurated.A great number of down-ward penetrating tests were conducted to different partical sizes of dust and to analyze the dust wetting behaviour respectively.The optimal compositions of wetting agents were obtained in accordance with different water contents and partical sizes of the dust after analyzing and statisting the achieved experimental data. The data show that the efficiency of chemical dust suppression of weting agents is much better than that of water.The results of the research work prove that the partical size and the water content of the dust are very important factors to the dust suppression.The results are also proved validly by the dropping experiment,which takes the penetrating diameter and penetrating time as the major factors.The superfine dust is much more difficult to be wetted.Since increasing the water content of dust is the best approach to control it,the choice of wetting agents for improving dispensation is significant.     

井下无风墙辅扇动压通风的分析及其应用

利用无风墙辅扇调节矿井通风网络和作业面的风流是一种非常有效和灵活的方法。应用矿井空气动力学理论分析了井下无风墙辅扇全压对巷道做功,克服井巷通风阻力,造成风流流动的过程;指出了需要充分利用风流动压的方向性,将扇风机的全部输出能量转化为动压形式进行通风;并着重分析了无风墙辅扇通风应注意的一些技术问题。     

Test of oxidation behavior of sulfide ores at ambient temperature for fire control

The coincidence of relevant factors, e.g. oxygen absorption quantity, weight increment, water soluble iron ions and sulfate ion of sulfide ore samples in the oxidation process, was tested through experiment. Based on a large number of tests for a group sample of sulfide ores from a mine, some important conclusions were obtained. The results obtained by the investigation indicate that there is no general interpretation relative to the oxygen absorption and the formation products of sulfate ion and water soluble iron ions during the oxidation process of sulfide ores at ambient temperature. However, the weight increment of the sulfide ore samples in the oxidation process at ambient temperature has a linear relationship with the auantitv of oxvaen absorption.     

阴离子型湿润剂与硫化矿尘的耦合性实验

为了研究粉尘与湿润剂的耦合性，采用毛细管正向渗透实验方法，研究了3种阴离子型湿润剂溶液的含量（质量分数）、温度、湿润液添加钠盐等因子对10种硫化矿尘湿润效果的影响．实验结果表明：1）当温度为20℃左右时，对部分硫化矿尘，湿润剂含量越高，湿润效果越差；2）矿尘的氧化性强弱对湿润剂的效果没有明显的影响；3）湿润剂溶液添加钠盐后能提高其湿润硫化矿尘的效果，使湿润剂的成本有所降低；4）溶液的湿润效果与温度有显著关系，温度为20℃左右，湿润剂对有些硫化矿尘不仅没有改善湿润效果，反而起了负作用，温度为20～35℃，湿润效果随温度升高而增大，温度从35℃增加到55℃，湿润效果没有变化，继续增加溶液的温度，湿润效果反而降低．     

谦比希铜矿膏体充填环管实验研究

膏体充填的管道输送阻力一般需通过环管实验获得。通过现场环管实验,研究了膏体浓度和水泥掺量对磨阻损失的影响。随着膏体体积浓度及流量的增加,摩阻损失均呈递增变化。随水泥掺量的增加,摩阻损失呈现先降低再增大的变化趋势,当掺量为8%时,摩阻最小,掺量为11%时,摩阻较大。在谦比希铜矿膏体充填环管实验数据测试基础上,分析了不同状态下管径150 mm管道中的流态,结果表明,谦比希膏体料浆在管内呈均质流动,流速不超过5.24 m/s时,膏体在管内呈层流流态。     

溜井放矿冲击气流的分析与污染控制措施

限制溜井卸矿时的冲击风流,对防止矿内空气污染,维持矿井通风系统稳定具有很大的实际意义,阐述了溜井卸矿时冲击风流产生的规律及其控制措施.     

粉尘湿润剂的性能测定新方法及其应用

介绍了一种粉尘湿润剂的性能测定方法。该方法是将一定质量的粉尘分散在制备好的湿润剂溶液中并搅匀,经过短时间的沉淀后,采用高精度激光粒度分析仪,测定悬浮在溶液中的粉尘粒径和分散度。结果表明:悬浮在溶液中的粉尘颗粒大小和分散度随着溶液中的湿润剂类型、湿润剂质量浓度和沉淀时间的不同而变化。因此,应用高精度激光粒度分析仪可以间接地研究粉尘湿润剂的性能,从而达到开发新的粉尘湿润剂的目的。以湖南某铅锌矿矿尘为研究对象,对粒径小于20μm的微尘进行实验,证明了该测定方法的可行性,并获得一组抑制铅锌矿矿尘的湿润剂配方。     

膏体泵送胶结充填工艺及应用前景

膏体泵送充填工艺是当今世界上最先进的充填工艺之一 ,技术含量较高。在分析影响膏体充填料可泵性因素的基础上 ,对膏体充填料制备、输送及设备进行评述 ,并对该工艺在铜录山矿的应用前景进行展望。     

风机并联运转效能分析及工况优化

在构建风机并联运转数学模型的基础上,分析了风机并联运转的等效风阻变化规律。从节能的角度分析了风机总能耗最小的条件。以铜绿山矿井通风系统作为实例,分析了风机工况点变化的规律。研究表明：并联风机的选择需要综合考虑风量、风压和风机之间的匹配关系;并联通风系统中风量调节的难度大;风门或风墙对风流分配的影响巨大;日常通风管理的关键在于风门管理和均衡需风量。     

铲运机自动化出矿技术及其应用前景

铲运机自动化出矿技术是当今世界上最经济高效的出矿技术,具有行驶速度快、设备运行效率高、运营成本低、安全风险低等显著特点。介绍了国外铲运机自动化出矿技术的发展、系统原理及应用效果,分析了其在国内地下矿山的应用前景。