粉料无尘装车机工作原理及其在冶金厂矿的应用

介绍集装车与防尘统一一于一一的无尘装车技术及其具有设备本质安全化特点的无尘装车机在解决粉状物料装车作业时的扬尘问题，保护作业工人健康，维护厂区环境方面的重要优越性。     

3GY型粉体无尘装车机的开发与应用

应用自主知识产权,采用“密闭输送、最小落差、零匝输送、软连接和科学运行管理”技术,科学组合,研究开发成功粉体无尘装车机,科学消除了高温,高压、高料位条件下贮仓放料,常规除尘器出灰和粉体转输与装车的粉尘污染与资源流失。     

粉料无尘装车技术及其在电除尘器、大布袋除尘器输灰系统中的应用

传统电除尘器、大布袋除尘器输灰系统存在工艺繁杂、能耗大、输送速度慢、系统难于维护及二次扬尘问题,电除尘器、大布袋除尘器输灰系统采用粉料无尘装车技术可有效简化工艺、提高生产速度和系统运行、维护可靠性,很大程度减少能耗并彻底根除二次扬尘。     

粉料无尘装车技术的应用及发展

传统除尘器卸灰、输灰系统存在工艺繁杂、能耗大、输送速度慢、设备故障率高、系统难以维护及二次扬尘等问题,采用新型粉料无尘装车技术可有效简化工艺,提高生产速度和系统运行、维护可靠性,很大程度上减少能耗并彻底根除二次扬尘。     

磨细粉煤灰自动装车除尘系统的研制

针对磨细粉煤灰由储料仓向罐式汽车内装料的作业特点,研制了自动化装车除尘系统,解决了装车过程中的粉尘污染问题,并实现了装车过程的自动化。     

粉料无尘装车技术及其在电除尘器,大布袋除尘器输灰系统中的应用

传统电除尘器、大布袋除尘器输灰系统存在工艺繁杂、能耗大、输送速度慢、系统难于维护及二次扬尘问题,电除尘器、大布袋除尘器输灰系统采用粉料无尘装车技术可有效简化工艺、提高生产速度和系统运行、维护可靠性,很大程度减少能耗并彻底根除二次扬尘。     

磨细粉煤灰自动装车除尘系统的研制

针对磨细粉煤灰由储料仓向罐式汽车内装料的作业特点,研制了自动化装车除尘系统,解决了装车过程中的粉尘污染问题,并实现了装车过程的自动化。     

织布厂无尘纱梭机

纱梭是织布厂修梭、整梭的一道工序。过去用手工纱梭作业,不但劳动强度高,而且有粉尘污染。大多数单位改用机械纱梭作业后,虽然减轻了劳动强度,但更加重了粉尘危害。 我厂于1984年在原机械式纱梭机上配备了全封闭罩、吸风机,改制成无尘纱梭机,使用后,不仅消除了粉尘危害,而且降低了劳动强度,受到了工人们的好评。织布厂无尘纱梭机@沈洪波$苏州市吴县布厂     

打造无尘化矿山

冀中能源峰峰集团有限公司通过采用推广新技术、新工艺、新装备,建立了较为完善的综合防尘体系,防尘水平不断提高,井下作业环境得到改善,为打造无尘化矿山打下了基础。     

对一煤砂机触电事故的分析

煤砂机是煤、砂装车作业可行走的电气设备 ,它的行走和提升均靠电源驱动。其特点是制造简单 ,制造和维修费用低 ,装车效率高于人力而低于装载机 ,适用于煤场、砂场装车作业。煤砂机电源拖线长 ,阴雨潮湿天气作业 ,如电源线绝缘破损 ,保护装置失效等易发生触电事故。一、事故简况１９９７年１１月 ,南京某建材公司经营租赁秦淮河六号码头 ,从事装卸黄砂销售经营业务。１１月２９日上午 ,经营部沈某操作煤砂机进行黄砂装汽车作业。１０时左右 ,沈某操作煤砂机感到有麻手现象 ,便停止操作。沈某找电工王某检查。王某检查时清除了按扭开关里的积…     

A Contribution to the Study of the Antidust Respirators’ Real Performance

In most industrial enterprises, hazardous factors are present in quantities exceeding permissible levels. Such a situation requires using antidust respiratory protection. It has been suggested, however, that filters for respirators are not assessed properly and that lab results might not be related to real filtering efficiency in industry. This article contains test results of some commercially available filtering half-masks, including the effect of loading with real dust, high humidity, high temperature, and a combination of loading with dust and high humidity on the half-masks’ performance. The results show that the effect of these factors is considerable and that a combination of loading with silica dust and exposing to high humidity can cause a complete loss of performance.     

不同粒径镁铝合金粉尘爆炸与抑爆特性研究

为了研究镁铝合金粉爆炸危险特性,利用20L球形爆炸容器进行测试,结果表明:180目 (80 μm)、 120目(125 μm) 和60目(250 μm)3种粒径下的金属粉尘爆炸下限浓度分别为45 g/m3,55 g/m3和95 g/m3。相同浓度下最大爆炸压力随粒径增大的而减小。以碳化硅和石墨为代表的研究中,60目,120目和180目的镁铝合金粉以10%的浓度梯度加入碳化硅浓度分别至50%,70%和80%,石墨浓度至30%,50%和60%时,镁铝合金粉不会发生爆炸。表明碳化硅及石墨等惰性粉尘都能对粉尘爆炸有抑制作用,其中石墨对镁铝合金粉的抑爆作用明显优于碳化硅。     

液化石油气汽车罐车爆炸事故原因分析及预防

通过一起液化石油气汽车罐车的爆炸事故,分析出装卸软管在卸车过程中破裂是爆炸事故的主因,提出了有效预防措施。同时对汽车罐车的安全运行在使用管理方面提出了建议。     

Modification of Waste Polypropylene with Waste Rubber Dust from Textile Cot Industry and its Characterization

Waste plastics collected from municipality solid waste (MSW), were segregated, washed and dried. The fractions consisting predominantly of polypropylene were further segregated from the lot, cleaned and dried. These were chopped into pieces and then mixed in a Brabender Plasticoder with rubber dust from rubber textile cot industry at various proportions, till homogeneity is achieved. The tensile strength, impact strength and flexural strength of the blends were measured and observed that these properties increasing with increase in loading of rubber dust, reach a maximum at 10 wt% and then decreases. The dynamic mechanical properties of blends such as storage modulus, loss modulus and tan δ measured by DMA-2980 shows an increase in damping characteristics with an increase in the proportion of rubber dust. The rubber dust consists of blends of NBR and PVC used in making textile cots in the textile industry after vulcanization. It is observed that 10% of rubber dust imparts better strength properties with waste PP. The dispersion of the scrap rubber dust in PP has been analysed under SEM and its compatibility has been studied.     

Influences of coal dust components on the explosibility of hybrid mixtures of methane and coal dust

In order to study the influences of coal dust components on the explosibility of hybrid mixture of methane and coal dust, four kinds of coal dust with different components were selected in this study. Using the standard 20 L sphere, the maximum explosion pressure, explosion index and lower explosion limits of methane/coal dust mixtures were measured. The results show that the addition of methane to different kinds of coal dust can all clearly increase their maximum explosion pressure and explosion index and decrease their minimum explosion concentration. However, the increase in the maximum explosion pressure and explosion index is more significant for coal dust with lower volatile content, while the decrease in the minimum explosion concentration is more significant for coal dust with higher volatile content. It is concluded that the influence of methane on the explosion severity is more pronounced for coal dust with lower volatile content, but on ignition sensitivity it is more pronounced for coal dust with higher volatile content. Bartknecht model for predicting the lower explosion limits of methane/coal dust mixture has better applicability than Le Chatelier model and Jiang model. Especially, it is more suitable for hybrid mixtures of methane and high volatile coal dust.     

Numerical simulation study of dust concentration distribution regularity in cavern stope

Based on the theory of gas-solid two-phase flow and the characteristics of cavern stope a model of dust migration was established. The dust concentration changing of cavern stope by ventilation in 20 min after blasting and the dust trajectory in different wind speed were simulated by Fluent Software. The results show that distribution of dust concentration is significantly affected by flow field of airway in cavern, and the dust concentration of inlet is higher than that of outlet and the highest one on the corner of inlet’s side. In the stope, the smaller the wind speed of inlet is, the shorter of dust can be captured, settled and discharged, the more obviously affected by the trajectory of gas flow field. It goes into the stage of clean cycle emissions after 60 s, the speed of dust concentration dropped is the biggest between 0 s and 70 s, the main dust in stope is respirable dust after 70 s, it needs much time to settlement.According to the measured data of metal mining, approximately 87% of dust was generated during the drilling and blasting in the mine (Wang, 1979). A lot of dust with high concentrations was produced during the cavern stope blasting and it was difficult to be discharged. It can help choose the right speed to rule out the dust quickly which produced during cavern blasting, if the dust concentration distribution and the dust migration law of different inlet velocity in the cavern can be verified, what’s more, the labor productivity can be increased. It has great significance for choosing reasonable ventilation parameters, reducing dust hazards of stope to researching the dust concentration distribution regularity in the stope.     

装料通廊尘源控制方法的分析

就矿仓装料通廊收尘情况进行了吹吸系统的试验研究 ,讨论了有组织补风在收尘中的作用及节能效果