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一、船用石棉概述我国作为石棉最大的生产国和消费国之一,在石棉材料的应用上,一直走在世界的前列,尤其是在船舶工业上,石棉作为优良的耐高温材料,曾经被广泛的使用。但是随着科技的不断发展和进步,石棉被检查出能够导致肺部疾病和癌症的发生,于2011年被国际海事组织列为禁品,在以后制造的所有船舶上,禁止使用石棉材料。石棉这种材料,本身具有很多的优点。其单元纤维具有很高的抗拉强度、弹性模量和可松解型。同时,还具有较大的内外比表面积,因而具有好的吸附性能、好 相似文献
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利用树脂聚合液生产树脂产品过程中,在成型机厂房产生大量的烟气和少量粉尘,这些烟气是在树脂成型过程中原料经高温加热后一些轻组分挥发而形成的,粉尘时固体颗粒粉碎时形成的.由于车间烟气收集设备和排风系统不佳,导致厂房内存在烟气和粉尘.现利用集气罩和油水分离系统排出烟气,在成型机接料口设置除尘系统,净化成型机厂房作业环境,保护员工身心健康. 相似文献
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以四川省雅安经石棉至泸沽高速公路C3合同段烟溪沟大桥承台砼施工为案例,分析大体积砼在建筑施工中的施工流程和质量控制措施,总结施工经验,为类似工程的施工提供建议。 相似文献
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本文结合四川省雅安经石棉至泸沽高速公路C3合同段烟溪沟大桥变截面空心薄壁墩施工实践,介绍了空心薄壁墩的翻模施工工艺,可为类似工程的施工提供参考。 相似文献
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对中转筒仓常见粮食粉尘的爆炸特性及其在粮食筒仓中的静电防治进行了研究与分析.结果表明,进口粮食粉尘中由于有机物含量较高,所以其层状、云状着火温度、最小点火能、爆炸下限浓度均低于国产粮食粉尘,而最大爆炸压力及最大爆炸压力上升速率一般要高于国产粮食粉尘,故其爆炸危险性与国产粮食粉尘相比更大;粮食粉尘的层状、云状着火温度等爆炸特性参数在粮食中转筒仓防尘防爆中具有重要的应用意义,可作为中转筒仓系统设备粉尘爆炸预防和防护等方面的重要理论依据;根据爆炸特性参数,结合实际情况,对粮食粉尘爆炸可以采取泄爆与抑爆相结合,以泄为主的防护措施. 相似文献
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2-氟-4-羟基苯甲酸在液晶材料的合成中具有重要作用和更多的优势。以3-氟-4-氰基苯酚为原料制备出了2-氟-4-羟基苯甲酸,经过醚化和酯化后合成出了一系列新型含氟液晶单体,采用红外光谱(FT-IR)、核磁共振(1H-NMR)、偏光显微镜(POM)、X射线衍射(WXRD)与差示扫描量热分析(DSC)等测试手段,对单体的结构和性能进行了表征。结果表明此类单体为热致互变液晶,并具有更宽的液晶温度区间和更好的液晶性能。 相似文献
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《Business History》2012,54(6):975-977
Annual reports are situated artefacts which relate a longitudinal grand narrative or corporate (auto)biography. This paper explores the narrative reporting of two former asbestos manufacturers, Turner &; Newall in the UK and James Hardie in Australia. Asbestos features prominently in the industrial expansion and decline of both companies as the toxic health effects of this ‘magic mineral’ became evident over time. This paper finds evidence of several distinct phases of reporting of asbestos, from reporting it as a source of unmitigated value, to a source of risk and finally as a threat to corporate viability. Each stage erased or re-situated the prior story of asbestos so that users of individual annual reports may be unaware of the grand narrative of asbestos in its transformation from ‘magic mineral to killer dust’. 相似文献
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《Business History》2012,54(2):102-115
In 1931 the British government introduced pioneering legislation to combat occupational disease in the asbestos industry. A key feature was an Asbestosis Scheme for compensating workers for industrial injury and death. This article examines the implementation of the Scheme at Turner &; Newall, the leading UK asbestos producer. The evidence reveals an inequitable system of compensation, especially when compared to the company's generosity to its shareholders. Deficiencies in British compensation law, the weaknesses of regulatory forces, and the company's policy of minimising the extent of asbestos disease are held responsible. 相似文献
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This historical study examines the actions of the Australian former asbestos company, James Hardie, when faced with a potentially ruinous corporate scandal between 2001 and 2007. The company became vilified as public awareness grew of the damage to public health its use of asbestos had caused. In response, it set-up a knowingly underfunded compensation fund supported by a strategy of misinformation and denial. Its actions are analysed using Oliver’s typology of strategic responses and theories of crisis management and crisis communications, providing insights into the company’s motivations for adopting strategies that took it to the brink of financial collapse. 相似文献
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进口含贵金属物料的表征和属性鉴别 总被引:1,自引:0,他引:1
采用X射线荧光光谱仪、X射线衍射光谱仪及标准方法等分析技术手段,对进口4种含贵金属物料样品进行表征,结果为:样品1外观为潮湿的黑色粉末,夹杂有金属光泽的小颗粒,主要由SiO2(石英)和CaCO3(方解石)组成,Au量为21.0 g/t,Ag量为160.0 g/t;样品2外观为灰色圆柱状颗粒,夹杂少量白色圆球状颗粒,主要由Al2O3和Ag组成;样品3外观为土黄色粉末夹杂大小不等结团状,水分含量为24.6%;样品4外观为灰色圆球状颗粒,主要由Al2O3组成。将样品的外观、组成等特征,与报验提供的样品来源、含贵金属物料、含贵金属产品及相关文献等进行比对,依据《中华人民共和国固体废物污染环境防治法》与《固体废物鉴别标准通则》GB 34330-2017判定:样品1来源为石英脉型金矿或尾矿经富集的含金矿物,其金含量达到金精矿品位要求,不属于固体废物;样品2为含银废催化剂经高温处理的产物,样品3为湿法冶炼提取锌或其他有价金属后的浸出渣,样品4为含钯废催化剂经高温处理的产物,样品2、样品3和样品4属于目前我国禁止进口的固体废物。 相似文献
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本研究应用高效液相色谱串联质谱法(HPLC/MS/MS)测定了样品抽取、传递和实验室检测过程中常用的笔、纸、标签、样品袋中结晶紫(含隐性结晶紫)的含量。纸试样采用乙腈直接提取,笔试样采用书写划痕后再用乙腈提取,HPLC/MS/MS定量测定。结果表明,除样品袋、滤纸、实验室无色标签纸和签字笔中不含有结晶紫(含隐性结晶紫)外,其余供试物品均含有一定量的结晶紫(含隐性结晶紫),其中A4打印纸、标签纸和圆珠笔中含量很高。为降低取样和检验过程中的污染风险,本文还对生产和检验检测各环节需要注意的问题做了较为详细的分析。本研究结果将有利于建立有效预防体系,从而最大程度避免样品在生产、检验和检测过程中的本底污染和假阳性结果。 相似文献
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This paper explores the American bankruptcy system -- especially the Chapter 11 code -- which since 1978 has allowed insolvent companies the opportunity to restructure and reorganise with the benefit of court protection from creditors. Particular attention is focused on asbestos companies, such as Johns--Manville, which have been among the most consistent and controversial filers for bankruptcy under Chapter 11. The history of asbestos and Chapter 11 is explored, against the backdrop of the burgeoning asbestos crisis, caused by increasing mortality and litigation. Some of the business and ethical issues involved are highlighted by examining in detail a recent bankruptcy (Federal Mogul/T&N in 2001) that has implications in both Britain and America. Chapter 11 bankruptcy is evaluated, particularly in the light of the trend towards similar mechanisms of insolvency in the UK, Europe and the rest of the world. It is concluded that, certainly as regards the experience with asbestos, Chapter 11 offers an inefficient and inequitable method of rehabilitating or rescuing failing businesses. 相似文献
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本研究建立了固相萃取-电感耦合等离子体质谱法测定高盐食品中15种稀土元素。样品经微波消解,赶酸后用0.1 mol/L醋酸铵缓冲溶液调节pH值,通过Inertsep Me-1固相萃取柱,去除氯化钠等盐分,吸附样液中的稀土元素,再经2 mol/L硝酸洗脱后,进入电感耦合等离子体质谱仪测定15种稀土元素。本研究所建立的方法能降低盐分对检测的干扰,定量准确,适用于高盐食品中稀土元素的测定。 相似文献