水泥厂噪声治理探讨

浙江天基水泥有限公司嘉善水泥粉磨站存在着大量的噪声源,直接导致厂界和敏感点超标；并影响到企业员工生产工作环境及周边居民正常休息。通过介绍对水泥厂磨机房、鼓风机、离心风机等噪声的成功治理来阐述水泥厂噪声治理的一般思路以及主要噪声源的治理方法。     

通风机房振动、噪声治理

本文介绍一种对通风机房振动、噪声进行治理的方法，结果表明这种方法可使噪声明显降低。     

离心风机减振降噪设计与应用实证

对某化学研究有限公司研发楼顶层46台玻璃钢离心风机进行噪声振动治理。在噪声的传播途径上设置封闭型的隔声房,在风机排风口安装消声器,并对该隔声房和消声器进行声学设计理论计算,通过减振设计计算来确定减振器的荷载选型。减振器及隔声房、消声器设置后,噪声排放值达到《工业企业厂界噪声排放标准》中的2级要求,并通过实测数据,进一步证实噪声治理措施的有效性。     

锦江饭店北楼冷冻机房噪声防治

锦江饭店北楼冷冻机房已扩建使用多年,由于机房与居民住房门户相对,长期来每逢夏季,机组噪声就严重污染里弄环境,对居民生活带来干扰和危害。去年冬季,经上海工业建筑设计院进行噪声治理设计,并采取降噪措施后,根据试运转和效果检测表明,噪声治理效果显著,达到并超过了设计要求。本文着重介绍该冷冻机房的降噪设计及治理效果,以供同类冷冻机房进行噪声治理作参考。 一、机房噪声及污染状况 锦江北楼冷冻机房平面图见图1。机房宽14米,长25米,面积约350米2。机房东侧装有五台SS-12.5型制冷压缩机组(每台制冷量为切万大卡/时,转速96o转/分),机…     

轧钢厂厂房内办公室及休息室的噪声治理

为解决某轧钢厂房空调系统的噪声超标问题,首先在厂房内布置噪声测点进行数据测量,在噪声频谱特性分析的基础上分别采取管道及风口消声和室内吸声处理等综合噪声治理措施。方案实施后,办公室的平均噪声下降了15.6 d B(A),休息室的平均噪声下降了17.2 d B(A),均达到国家规定的噪声标准,为工业厂房空调系统的噪声治理提供了可参考的依据。     

2506F41型柴油发电机组的噪声治理

２５０６Ｆ４１型柴油发电机组的噪声治理陈天宁，胡选利，张升陛（西安交通大学）中小型柴油发电机是目前许多中小型企业自备发电机房的主要设备，对于缓解经济飞速发展与电力供应短缺的矛盾起到了很大作用。但是，柴油发电机工作时的强烈噪声所构成的环境污染也不容忽视...     

建筑附房设备噪声治理

通过实例从分析建筑附房设备噪声产生的原因着手,总结了噪声治理方法在设计、施工、和实践中的应用,详细介绍了建筑附房设备噪声源的控制、设备系统设计与建筑的配合、空调系统的噪声控制、设备安装的消声减振和消声器选型等的具体方法.     

空压机房噪声综合治理

河南省焦作矿务局朱村煤矿空压机房的噪声治理工程取得了较好的降噪效果,大大改善了职工的工作环境,收到了一定的社会效果。 一、治理前状况 朱村煤矿是1958年投产,设计能力60万t/年的中型矿井,当时没有把环境保护工程列入设计项目。随着矿井生产能力的提高,人员的增加及工业场区面积扩大,环境污染、特别是空压机房的噪声已成为该矿的一大公害。     

高速闭式冲床的噪声治理

高速闭式冲床是产品加工制造的一种关键设备，较广泛应用于生产厂家的现代化生产流水线。但该装置的运行，造成了生产车间噪声排放的超标，必须进行治理。通过杭州杭氧填料有限公司某系列冲床采用模块化隔声罩噪声治理的过程，阐明高速闭式冲床噪声治理的原理及设计过程。     

空气压缩机的噪声治理

一、前言姜堰市区在机电、化工、轻工、食品等行业中使用各类型号空气压缩机有数十台套，其中大部分位于厂界处，运转时排放噪声干扰了市民的正常工作与休息，通过全面的调查、测试、分析，分别作出了相应的治理措施。使这类设备排放噪声大大降低。现以姜堰市分析仪器厂生产中使用的2台3L－10／8型空气压缩机为例，阐述对空气压缩机运转时排放噪声的治理方法。该厂空压机房北隔6m的行人道与工人新村住宅楼群相邻。当空压机运行时，声源噪声达96dB（A），居民住宅户外环境噪声为78dB（A），噪声严重地污染了周围环境。为解决噪声扰民的问题…     

INDICATIONS OF GRINDING MILL OPERATIONS BY MILL NOISE PARAMETERS

Mill noise has been utilized as a measure of mill load and it has been a constant threat to the hearing of mill operators. This paper investigates a further aspect of mill noise and presents an analysis of the noise generated by a batch ball mill and of the relationships between mill noise and mill parameters. It is demonstrated that the reduction in mill noise due to the presence of ore in the mill can usefully indicate variations in mill and pulp conditions.     

INDICATIONS OF GRINDING MILL OPERATIONS BY MILL NOISE PARAMETERS

ABSTRACT

Mill noise has been utilized as a measure of mill load and it has been a constant threat to the hearing of mill operators. This paper investigates a further aspect of mill noise and presents an analysis of the noise generated by a batch ball mill and of the relationships between mill noise and mill parameters. It is demonstrated that the reduction in mill noise due to the presence of ore in the mill can usefully indicate variations in mill and pulp conditions.     

Effect of ball mill grinding parameters of hydrated lime fine grinding on consumed energy

The influence of several grinding parameters such as charged material volume, ball filling ratio, and mill rotation speed on energy efficiency of fine grinding of hydrated lime and the product fineness of hydrated lime was studied experimentally using a laboratory scale ball mill. The product size and surface area of the ground samples were determined with respect to the above variables, and changes in energy input during the grinding were described in detailed. Finally, the optimum conditions for the grinding of the hydrated lime with the ball mill were obtained. The results from this study showed that the ball mill load and mill speed are the most important parameters rather than ball mill charged material volume for the fine grinding of the hydrated lime using the ball mill in terms of energy efficiency associated with external surfaces.     

基于信息融合的球磨机料位分级与检测研究

火力发电厂锅炉制粉系统的主要设备之一——球磨机的运行状况优劣在一定程度上决定了电厂的经济运行状况好坏。分析了球磨机磨筒内料位的各种影响因素及影响特性,提出了料位分级理论,将料位分为非经济区、优化区与危险区三个区域,解决了数据融合测料位时无法获得大量料位样本的问题。在此基础上,提出了基于BP人工神经网络测量球磨机料位的软测量方法,对球磨机现场数据分析进一步验证了所提方法的有效性。该方法确定了球磨机最佳运行工况的范围,为实现球磨机系统的优化运行和自动控制奠定了基础。     

Fabrication of ultrafine W – Cu powders by mechanical alloying

Abstract

Ultrafine composite powders of W – 15 wt-%Cu, W – 25 wt-%Cu, and W – 35 wt-%Cu have been fabricated by mechanical alloying. The effects of type of mill, process control agent, temperature of milling, and ball/powder ratio on the final products have been evaluated. The results show that the planetary ball mill possesses a higher impact energy intensity than that of the vibratory ball mill. The optimum milling time is confirmed by the formation of a nanocrystalline microstructure in the planetary ball mill after optimisation of the milling parameters. A steady state between cold welding and fracture is attained with a milling time of up to 25 h in the planetary ball mill under optimised conditions. Crystallites with sizes of 7 – 8 nm for W – Cu composite powders have been obtained after 25 h of ball milling. The powders obtained after mechanical alloying have been characterised in terms of their size, shape, phase constitution, and microstructural features using X-ray diffraction and scanning electron microscopy.     

球磨机负荷检测的现状与发展趋势

根据球磨机负荷的检测在球磨过程自动控制中的重要作用 ,论述了球磨机负荷检测的现状 ,指出了未来的发展趋势     

超细硅酸锆磨矿工艺优化与节能

为扩展球磨机、搅拌磨在物料粉磨过程中的应用,通过对比球磨机与搅拌磨的特性,分析两者在硅酸锆生产中的研磨效率,发现在磨矿过程中采用球磨机与搅拌磨分段研磨、优化组合的方式能充分发挥两种设备的优点,提高研磨效率。结果表明:使用该技术能大规模地生产出中位粒径为1μm的超细硅酸锆产品,并能显著降低磨矿能耗,节约生产成本。     

大型节能水泥粉磨技术的发展

归纳总结了当前国内外大型节能的水泥粉磨的发展动态 ,指出以辊压机或特殊结构的立磨作为预粉磨机与球磨机组成的水泥粉磨系统是当前的主要流行方式 ,另外用粉磨效率高的立磨或辊压机代替球磨机的水泥终粉磨方式在国外也有一定发展 ,但采用终粉磨系统要注意水泥质量问题     

Size reduction performance evaluation of HPGR/ball mill and HPGR/stirred mill for PGE bearing chromite ore

In the present study, size reduction experiments were performed on High-Pressure Grinding Rolls (HPGR), ball mill and stirred mill of PGE bearing chromite ore. The performance of HPGR was evaluated in two stages of size reduction to reduce energy consumption. In the first stage of HPGR, the effect of operating variables such as the gap between the rolls, roll speed, and specific pressing force on product size (P₈₀) and energy consumption (E_CS) was investigated. The process to get the smallest product size was optimized within the experimental range of investigation. The crushed product of HPGR was subjected to grinding in the second stage in a ball mill and stirred mill. The effect of mill speed, grinding time, and ball size on the performance of the ball mill was investigated and the product was further investigated in the second stage. A comparative analysis of the ball mill and stirred mill performance and energy consumption at different grinding time intervals was also performed. It was found that the ball mill consumed 54.67 kWh/t energy to reduce the F₈₀ feed size of 722.2 µm to P₈₀ product size of 275.4 µm while stirred mill consumed 32.45 kWh/t of energy to produce the product size of 235.6 µm. It also showed that stirred mill produced finer product than the ball mill at around 40% lesser consumption of energy. It can be concluded that the HPGR-Stirred mill combination was a more energy-efficient grinding circuit than the HPGR-Ball mill combination for PGE bearing chromite ore.