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Silicosis in Automobile foundry Workers: A 29-Year Cohort Study

Biomedical and Environmental Sciences 2010年第2期23卷 121-129页

作者： MIN ZHANG YING-DONG ZHENG XIE-YI DU YANG LU WEN-JIE LI CHENG QI ZHENG-LAI WU Department of Epidemiology School of Basic Medicine Peking Union Medical College Institute of Basic Medical Sciences Chinese Academy of Medical Sciences Beijing 100005 China National Institute of Occupational Health and Poison Control Chinese Center for Disease Control and Prevention Beijing 100050 China Peking University Health Science Center Beijing 100191 China Dongfeng Institute of Occupational Health Shiyan 442001 Hubei China

Objectives The purposes were to determine the relationship between silicosis among foundry workers and their cumulative exposure to silica dust, and to establish a regression model to predict the risk for developing silicosis by a given length of employment and air concentrations of silica at worksites. Methods A 29-year cohort study was conducted, including all those employed for more than one year during January 1, 1980 to December 31, 1996 and all members of the cohort were followed-up to December 3 1, 2008. In total, 2 009 workers of an automobile foundry in Shiyan, Hubei province were recruited in the study, 1 300 at eight worksites including sand preparation, cast shakeout, and finishing, melting, moulding, core-making, overhead crane operation and pouring as exposed group, and the other 709 auxiliary workers at the same factory, such as electricians, inspectors, fitters, and so on, as control group. Person-years of observation were calculated by persons observed and years followed-up for each of them. Person-year incidence of silicosis and its relative risk （RR） or odds ratio （OR） and 95% confidence intervals （CI） among the workers were estimated, adjusted for relevant factors with logistic regression model using SPSS version 15.0 software. Results Totally, 2 009 workers were followed-up for 37 151 person-years and 48 cases of silicosis were found, with an overall incidence of 1.34 per thousand, 2.02 per thousand in exposed group, and 0.15 per thousand in control one. Risk of silicosis was significantly higher in the exposed group than that in the control one （RR=13.13, 95% CI 3.18-54.13）, higher in men than that in women （RR=13.92, 95% CI 1.92-100.93）. Risks of silicosis varied by job, highest in those exposed to cast shakeout and finishing （RR=28.14, 95% CI 6.43-123.11）, followed by those exposed to pouring （RR-22.23, 95% CI 5.01-98.55） in the foundry. Average length of employment at onset of silicosis was 25.94 years, and silicosis incidence increased with length of employment. Average age at onset of s

关键词： foundry Silica Silicosis Occupational exposure limit Cohort study Incidence Person-year Relative risk （RR） Odds ratio （OR）

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造型现代化

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铸造 2024年第5期73卷 725-726页

作者：刘金城(译) 不详

一家湿砂铸铁厂,皮尔铸造厂(Pier foundry)安装了一个新的无砂箱造型系统和自动化平台,为自己的发展做好了准备。湿砂造型对于快速、经济地生产各种铸件来说是非常可靠和有效的。它在长期运行或短期运行时也非常灵活;它是节能的;最重要... 详细信息

一家湿砂铸铁厂,皮尔铸造厂(Pier foundry)安装了一个新的无砂箱造型系统和自动化平台,为自己的发展做好了准备。湿砂造型对于快速、经济地生产各种铸件来说是非常可靠和有效的。它在长期运行或短期运行时也非常灵活;它是节能的;最重要的是,它能提供高质量的零件。然而,湿砂形成铸型的工艺过程是值得改进的。皮尔铸造和模样股份有限公司(Pier foundry and Pattern Shop)自1889年以来一直在明尼苏达州圣保罗市(St.Paul,MN)铸造零部件。

关键词：湿砂自动化平台明尼苏达州工艺过程圣保罗市皮尔铸造厂 foundry

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Review of current research and application of ductile cast iron quality monitoring technologies in Chinese foundry industry

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China foundry 2015年第4期12卷 239-250页

作者： Da-yong Li Zhen-yu Xu Xu-liang Ma De-quan Shi School of Material Science and Engineering Harbin University of Science and Technology

There is a long history of studying and making use of ductile cast iron in China.Over the years,the foundrymen in China have carried out a lot of valuable research and development work for measuring parameters and controlling the quality in ductile cast iron production.Many methods,such as rapid metallographic phase,thermal analysis,eutectic expansion ratio,surface tension measurement,melt electrical resistivity,oxygen and sulfur activity measurement,ultrasonic measurement and sound frequency measurement,have been used and have played important roles in Chinese casting production in the past.These methods can be generally classified as liquid testing and solid testing according to the sample state.Based on the analysis of the present situation of these methods applied in the Chinese metal casting industry,the authors consider that there are two difficult technical problems to be currently solved in monitoring ductile iron quality.One is to seek an effective method for quickly evaluating the nodularizing result through on-the-spot sample analysis before the liquid iron is poured into the mould.The other is to find a nondestructive method for accurately identifying casting quality before castings are delivered.

关键词： Chinese foundry ductile cast iron quality monitoring evaluation method

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Recycling of waste foundry sands by chemical washing method

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China foundry 2019年第2期16卷 141-146页

作者： Senay Balbay Bilecik Seyh Edebali University Vocational School Department of Chemical Technologies

This study aims to remove the metals(inorganic and heavy metals) in waste foundry sand(WFS)via chemical washing method. Washed waste foundry sand(WWFS) samples were obtained by using triptych washing successively with 5 M HCl, 5 M H_2SO_4 and 5 M NaOH solutions. Analysis on functional groups,micropores, heavy metals,and inorganic components of WFS and WWFS was carried out by using FT-IR, SEM and XRF. Results show that the concentration values of some inorganic components such as Ca, Fe, Mg, S were decreased, and the maximum removal percentage of these inorganic components are 47%, 19%, 32%, and 8%,respectively. The concentration values for each of the heavy metals of WWFS are below of limit values given in App-3 List of Regulation on General Principles of Waste Management. The removal percentages of Pb, As and Zn elements are 100%, 71%, and 40%, respectively. The findings of this research suggest that WWFS can be used in more applications due to its ability to remove heavy metals and some other inorganic components.

关键词： chemical washing heavy metal pollutants waste foundry sand recycling

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Additive manufacturing and foundry innovation

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China foundry 2021年第4期18卷 286-295页

作者： Yu-sheng Shi Jin-liang Zhang Shi-feng Wen Bo Song Chun-ze Yan Qing-song Wei Jia-min Wu Ya-jun Yin Jian-xin Zhou Rui Chen Wei Zhou He-ping Jia Huan-qing Yang Hai Nan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministty of EducationWuhan 430074China Shenyang Research Institute of foundry Co. Ltd.Shenyang 110011China Liaoning Senyuan Additive Manufacturing Technology Co.Ltd.Anshan 114000LiaoningChina Jiangsu Jiuyu Machinery Co. LtdSuzhou 215300China Xi'an Space Engine Company Co. Ltd.Xi'an 710100China Beijing Institute of Aeronautical Materials Beijing 100095China

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-cost development of high-performance components with complex shapes.The additive manufacturing technology commonly applied in casting mold preparation(fusible molds,sand molds/cores and ceramic cores)mainly includes selective laser sintering(SLS)and binder injection three-dimensional printing(3DP).In this work,the research status of SLS/3DP-casting processes on material preparation,equipment development,process optimization,simulation and application cases in aerospace,automotive and other fields were elaborated.Finally,the developing trends of the additive manufacturing technology in the future of foundry field are introduced,including multi-material sand molds(metal core included),ceramic core-shell integration and die-casting dies with conformal cooling runners.

关键词： additive manufacturing foundry selective laser sintering 3D printing multiple materials die-casting dies

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foundry

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集成电路应用 2008年第7期 15-16页

中芯国际深圳晶圆厂奠基中芯国际深圳8英寸、12英寸集成电路制造项目6月21日在深圳大工业区奠基。根据计划,该项目将于13个月内完成土建,18个月内正式投产。中芯国际已经在深圳注册成立了中芯国际集成电路制造(深圳)有限公司作为项目建... 详细信息

中芯国际深圳晶圆厂奠基中芯国际深圳8英寸、12英寸集成电路制造项目6月21日在深圳大工业区奠基。根据计划,该项目将于13个月内完成土建,18个月内正式投产。中芯国际已经在深圳注册成立了中芯国际集成电路制造(深圳)有限公司作为项目建设主体。

关键词：中芯国际 foundry 高压工艺爱普生量产生产线深圳广东晶圆厂

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foundry

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集成电路应用 2008年第10期 13-14页

标杆企业是集成电路产业的支撑集成电路作为一个国家或地区的战略性产业,各国政府都会不遗余力地促进其发展。如俄罗斯、美国纽约州及以色列政府等的作法都是政府投资或者提供补助资金。近期有消息

关键词：中芯国际美元投资武汉俄罗斯本位币财政管理湖北纽约州英特尔 foundry 集成电路产业 IC产业工业产业

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foundry

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集成电路应用 2008年第8期 13-14页

世纪晶源半导体基地释出产能世纪晶源深圳化合物半导体产业基地经过近4年建设2007年10月正式投产,首期项目产能即已成为全球最大的LED外延片厂,主要生产半

关键词：外延片竞争力领域微波竞争能力电磁波晶圆厂 foundry LED 化合物半导体半导体光激射器半导体激光器半导体照明华虹专工

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开源软件社区开发者协作网络结构演化分析——以Cloud foundry社区为例

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复杂系统与复杂性科学 2019年第4期16卷 31-43页

作者：刘鹏张鹏臣王念新江苏科技大学经济管理学院

已有关于开源软件社区协作模式的研究针对开发者协作网络的静态结构展开了广泛探讨,对其结构演化特性的分析相对较少。本文以Cloud foundry社区为例,通过代码修订关系构建开发者协作网络,并对其结构和演化过程进行了分析。研究结果表明... 详细信息

已有关于开源软件社区协作模式的研究针对开发者协作网络的静态结构展开了广泛探讨,对其结构演化特性的分析相对较少。本文以Cloud foundry社区为例,通过代码修订关系构建开发者协作网络,并对其结构和演化过程进行了分析。研究结果表明开发者协作网络的演化以其最大连通子图结构变化为标志,分别为“松散连接”状态、“链式”结构和具有“核心—边缘”结构的多模块小世界状态。最大连通子图的演化过程与子项目内在关联。此外,开发者协作关系表现出倾向性连接、同质相吸、差异偏好相结合的特征。本研究有助于进一步认识开源软件社区协作的模式,亦是对大规模群体开放式协作创新活动的研究工作的丰富。

关键词： Cloud foundry 开发者协作网络开源软件社区结构演化

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Glass matrix composite material prepared with waste foundry sand

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China foundry 2006年第4期3卷 279-283页

作者： ZHANG Zhao-shu XIA Ju-pei ZHU Xiao-qin LIU Fan HE Mao-yun College of Biological and Chemical Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China

The technology of glass matrix of the composite material manufactured through a sintering process and using waste foundry sand and waste glass as the main raw materials was studied. The effects of technological factors on the performance of this material were studied. The results showed that this composite material is formed with glass as matrix, core particulate as strengthening material, it has the performance of glass and ceramics, and could be used to substitute for stone.

关键词： waste foundry sand waste glass composite material

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