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Digital Mine Research and Practice Based on Mining and Metallurgy System Engineering

An-lin Shao

《工程管理前沿（英文）》 2016年第3卷第1期页码 67-73 doi: 10.15302/J-FEM-2016006

摘要： Iron ore is necessarily basic raw material for industrialization and urbanization and related to the industrial distribution and development programming. The lean iron ore resource in our country is high-cost and low-efficiency, which cannot meet the demand of iron and steel industry, and even endanger the safety of industrial economy. Ansteel mining has created “grade decision-based multi-system integration” mode of mining and metallurgy system engineering and realized scale and efficient development of lean iron ore on basis of the construction of digital mines. Moreover, the “wisdom mines” was proposed and had led to the transformation and upgrading of iron developments.

关键词： exploration of lean iron ore mining and metallurgy system engineering digital mine wisdom mine

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中国的小岩体岩浆矿床

汤中立

《中国工程科学》 2002年第4卷第6期页码 9-12

摘要：

我国没有发现与巨型层状岩体有关的岩浆矿床，但是在许多小岩体中，却发现了超大型和大型的岩浆矿床；提出了小岩体岩浆矿床是今后一个重要的研究和勘查方向。

关键词：小岩体岩浆矿床勘查

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我国黑色金属资源发展形势研判

“黑色金属矿产资源强国战略研究”专题组

《中国工程科学》 2019年第21卷第1期页码 97-103 doi: 10.15302/J-SSCAE-2019.01.014

摘要：

作为供给侧结构性改革的先行者，中国钢铁行业积极化解过剩产能，彻底取缔“地条钢”，2016—2017年化解钢铁产能超过1.2×10⁸t，清除“地条钢”等违法产能1.4×10⁸t。当前，全球钢铁工业处于产能过剩周期，中国钢铁消费由持续增长向“峰值平台区”转变，单位GDP粗钢消费强度回落，单位投资粗钢消费强度下降，预计到2025年国内粗钢消费需求量为6×10⁸~6.5×10⁸t，产量为6.5×10⁸~7.0×10⁸t，到2030年，国内粗钢消费需求量为5.3×10⁸~6.0×10⁸t，产量为5.9×10⁸~6.5×10⁸t。与此同时，我国废钢资源供给量将快速增加，未来充足的废钢资源将是我国钢铁工业强有力的支撑，铁素资源构成也将发生重大变化，国际铁矿石资源的需求量将逐步下降，同时对于推动生态文明建设和绿色发展具有重要作用。

关键词：钢铁废钢铁矿石峰值平台区

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Lean Product Development—Faster, Better … Cleaner?

Geert Letens

《工程管理前沿（英文）》 2015年第2卷第1期页码 52-59 doi: 10.15302/J-FEM-2015007

摘要： To address this challenge, lean product development has emerged to become the leading improvement methodology for companies toward the creation of a competitive advantage on innovation and technology leadership. While lean product development has its origin in the best practice studies of Japanese car manufacturers such as Toyota, it has been further elaborated in defence and aerospace organizations over the last two decades, and recently empirical evidence has become available for successful introductions in sectors different from the traditionally-studied environments. The primary purpose of this work is to untangle the fuzziness that still surrounds lean product development and to ground the key aspects of lean product development based on insights from six studies published in a special issue of the on this topic. This demonstrates how better and faster product development can be achieved through the integration of lean principles with the best of more traditional new product development (NPD) practices, into a holistic system that can be characterised by value-focused and risk-based decision making, the socio-technical integration of people and process, improved project, pipeline and portfolio management, optimized knowledge management, and the creation of a learning organization. Unfortunately, while the increasing global competition offers the potential to improve the quality of life for many, the spirit of faster, better, and cheaper also threatens to endanger the future of our planet as a whole. As the majority of a product’s social and ecological impacts are committed in the design phase, it, therefore, seems imperative to investigate the integration of lean product development and eco-design principles. As a result, this work also explores the symbiosis of both approaches through the identification of tools and methods that can support the triple bottom-line goals for a sustainable future of life and business.

关键词： lean product development sustainability engineering responsible design

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铁矿粉熔态还原冶炼的新流程

许志宏,王立新,杨章远,谢裕生,胥昌第,招冀

《中国工程科学》 1999年第1卷第3期页码 69-74

摘要：

提出了一种直接用粉矿和煤的熔态还原炼铁新流程，其最大特点是消除污染产生源。为解决过去流化床铁矿粉还原技术中的粘结问题，提出了非等温渗碳的流化移动床的新方法。建议放弃一些工业化国家在熔化气化炉中发展二次燃烧率的指导思想，代之以系统的能量最佳利用原理。提出直接采用粉矿、综合利用尾气和利用高炉下部还原机制的具体建议，用以实现冶金与化工系统的集成，保证系统在技术和经济上成功。为了适应经济全球化的形势发展，建议以自力更生和引进国外技术与资金相结合的方式，促进熔态还原和其他冶金新技术在我国早日成功。

关键词：熔态还原粉末流化移动床环境保护技术改造

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Proposing a “lean and green” framework for equipment cost analysis in construction

Ming LU, Nicolas DIAZ, Monjurul HASAN

《工程管理前沿（英文）》 2019年第6卷第3期页码 384-394 doi: 10.1007/s42524-019-0033-4

摘要： One limitation of previous productivity-driven research on equipment selection and operation simulation lies in the fact that the green aspects of construction activities have been largely neglected in analysis of costefficiency of construction operations. On the other hand, studies attempting to measure greenhouse gas emission due to construction activities have yet to develop a methodology that correlates their findings and implications with construction productivity. In order to address the immediate need for improving the sustainability performance of construction projects, it is imperative for the construction industry to evaluate greenhouse gas emission as a cost factor in construction planning, equipment selection, and cost estimating. In this context, this paper formalizes an integrative framework for equipment cost analysis based on the concepts of lean construction and green construction, aimed to guide the selection of appropriate construction equipment considering exhaust emission and productivity performance at the same time. The framework is elaborated in earthwork construction in order to evaluate the impact of greenhouse gas emission in estimating equipment hourly rates and assessing greenness and sustainability for alternative equipment options.

关键词： green construction lean construction equipment simulation earthwork construction sustainability productivity

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21世纪以来全球矿业形势回顾与展望

闫卫东,郭娟,徐曙光,林博磊,孙春强

《中国工程科学》 2019年第21卷第1期页码 61-67 doi: 10.15302/J-SSCAE-2019.01.009

摘要：

21世纪以来，全球矿业随世界经济周期性波动，中国推动世界矿业发展。全球矿产勘查开发总体投入不足，新发现减少。世界矿产品消费普遍上升，锂、钴等新能源新材料矿产品需求呈现爆发式增长。矿业公司由大规模扩张转为资产重构，投资更加谨慎。矿产资源战略得到高度重视，矿业法律政策总体趋紧。展望未来，世界矿产品消费总体仍将持续增长，南亚地区将成为矿业投资热点，能源革命和人工智能将促进全球矿业实现飞跃，对矿业的利益诉求矛盾将进一步升级。

关键词：世界经济全球矿业石油铁铜

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Hotspots Evolution and Frontier Analysis of Lean Construction Research—Integrated Scientometric Analysis

Qing-hua He,Ge Wang

《工程管理前沿（英文）》 2015年第2卷第2期页码 141-147 doi: 10.15302/J-FEM-2015023

摘要： To develop a lean and green construction industry, Lean Construction (LC) is proposed as a new construction production method to improve the efficient use of resources and the value of construction supply chains, which has received increasing research concerns from scholars and practitioners. Based on related articles covered by the Web of Science and Scopus databases between 1995 and 2014, this study conducts a scientometric analysis. The analysis identifies four core topics in existing research, including: Last Planner System (LPS); production control theory; improvement and evaluation of productivity; and principle of value. Three major directions of LC research: greening LC; Building Information Modeling (BIM) based LC; and lean safety management, are also proposed. Lastly, several recommendations for future LC research and practice are provided in the literature review.

关键词： Lean Construction green industry efficient use

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Experimental study of stratified lean burn characteristics on a dual injection gasoline engine

Chun XIA, Tingyu ZHAO, Junhua FANG, Lei ZHU, Zhen HUANG

《能源前沿（英文）》 2022年第16卷第6期页码 900-915 doi: 10.1007/s11708-021-0812-6

摘要： Due to increasingly stringent fuel consumption and emission regulation, improving thermal efficiency and reducing particulate matter emissions are two main issues for next generation gasoline engine. Lean burn mode could greatly reduce pumping loss and decrease the fuel consumption of gasoline engines, although the burning rate is decreased by higher diluted intake air. In this study, dual injection stratified combustion mode is used to accelerate the burning rate of lean burn by increasing the fuel concentration near the spark plug. The effects of engine control parameters such as the excess air coefficient (Lambda), direct injection (DI) ratio, spark interval with DI, and DI timing on combustion, fuel consumption, gaseous emissions, and particulate emissions of a dual injection gasoline engine are studied. It is shown that the lean burn limit can be extended to Lambda= 1.8 with a low compression ratio of 10, while the fuel consumption can be obviously improved at Lambda= 1.4. There exists a spark window for dual injection stratified lean burn mode, in which the spark timing has a weak effect on combustion. With optimization of the control parameters, the brake specific fuel consumption (BSFC) decreases 9.05% more than that of original stoichiometric combustion with DI as 2 bar brake mean effective pressure (BMEP) at a 2000 r/min engine speed. The NO_x emissions before three-way catalyst (TWC) are 71.31% lower than that of the original engine while the particle number (PN) is 81.45% lower than the original engine. The dual injection stratified lean burn has a wide range of applications which can effectively reduce fuel consumption and particulate emissions. The BSFC reduction rate is higher than 5% and the PN reduction rate is more than 50% with the speed lower than 2400 r/min and the load lower than 5 bar.

关键词： dual injection stratified lean burn gasoline engine particulate matter emission combustion analysis

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痩肉猪育种的发展及展望

熊远著

《中国工程科学》 2000年第2卷第9期页码 42-46

摘要：

文章对世界的猪育种过程特别是中国的瘦肉猪育种，从猪种资源调査到优良猪种引进与新品种选育，专门化品系选育与配套利用，种猪测定等方面进行了回顾，就分子生物技术在猪遗传育种中的应用及取得的成果作了简要概述。展望了21世纪瘦肉猪育种的目标，并就新品种培育、猪种资源保存、完善种猪测定体系和加速分子生物技术在猪育种中的应用提出了建议。

关键词：猪瘦肉型育种

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Selective catalytic reduction of NOx from exhaust of lean-burn engine over Ag-Al2O3/cordierite catalyst

LI Junhua, KANG Shoufang, FU Lixin, HAO Jiming

《环境科学与工程前沿（英文）》 2007年第1卷第2期页码 143-146 doi: 10.1007/s11783-007-0025-1

摘要： A highly effective Ag-AlO catalyst was prepared using the sol-gel method, and characterized by surface area using nitrogen adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The catalyst performance was tested on a real lean-burn gasoline engine. Only unburned hydrocarbons and carbon monoxide in the exhaust were directly used as reductant (without any external reductant), the maximum NO conversion could only reach 40% at 450?C. When an external reductant, ethanol was added, the average NO conversion was greater than 60%. At exhaust gas temperature range of 350 500?C, the maximum NO conversion reached about 90%. CO and HC could be efficiently oxidized with Pt-AO oxidation catalyst placed at the end of SCR converter. However, NO conversion drastically decreased because of the oxidation of some intermediates to NO again. The possible reaction mechanism was proposed as two typical processes, nitration, and reduction in HC-SCR over Ag-AlO.

关键词： lean-burn gasoline external reductant nitrogen adsorption conversion catalyst performance

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Chromium steel from chromite ore processing residue----A valuable construction material from a waste

Jay N. MEEGODA, Wiwat KAMOLPORNWIJIT

《环境科学与工程前沿（英文）》 2011年第5卷第2期页码 159-166 doi: 10.1007/s11783-011-0325-3

摘要： As species we humans generate excessive amounts of waste and hence for sustainability we should explore innovative ways to recover them. The primary objective of this study is to demonstrate an efficient and optimum way to recover chromium and iron from chromite ore processing residues (COPR) for the production of chrome steel and stainless steel. In Hudson County, New Jersey, there are more than two million tons of leftover COPR. Part of COPR was used as fill materials for construction sites, which spread the problem to a larger area. With high solubility along with their toxicity leached chromate from COPR is threatening the environment as well as human health. In this research, COPR was thermally treated to recover iron with chromium by applying techniques used in steel manufacturing. An extensive experimental program was performed using a Thermo-Gravimetric Analyzer (TGA) and bench scale tests to thermally treat the processed chromium contaminated soils with carbon and sand at varying temperatures and under reducing environment. The optimum chemical composition of COPR and additives to be used in the melts were evaluated based upon the thermodynamic properties of the mixture to ensure good phase separation, least amounts of iron and chromium oxides in the slag and minimum variability of final product (steel or iron with chromium). The impact of other oxides on the steel making process was evaluated to minimize the adverse impact on the process. The research demonstrated the feasibility of recovering a valuable construction material (chrome steel) from a waste (COPR).

关键词： chromite ore processing residue chromium steel reduction thermal treatment beneficial use

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Blockchain-driven supply chain finance solution for small and medium enterprises

Jian LI, Shichao ZHU, Wen ZHANG, Lean YU

《工程管理前沿（英文）》 2020年第7卷第4期页码 500-511 doi: 10.1007/s42524-020-0124-2

摘要： Blockchain has attracted much attention in recent years with the development of cryptocurrency and digital assets. As the underlying technology of cryptocurrency, blockchain has numerous benefits, such as de-centralization, collective maintenance, tamper-resistance, traceability, and anonymity. The potential of the blockchain technology (BT) is widely recognized in the financial field. Although some scholars have proposed the combination of blockchain and supply chain finance (SCF), the details of this combination is rarely mentioned. This study first analyzes the coupling between SCF and blockchain technology. Second, the conceptual framework of blockchain-driven SCF platform (BcSCFP) is presented. Third, the operation process of three SCF models on the BcSCFP is proposed. Finally, a case study combined with actual events is conducted. This paper has a positive practical significance in the operation and management of banks and loan enterprises.

关键词： blockchain technology supply chain finance risk management smart contract decentralization

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Owner-dominated building information modeling and lean construction in a megaproject

Mingyue LI, Zhuoling MA, Xi TANG

《工程管理前沿（英文）》 2021年第8卷第1期页码 60-71 doi: 10.1007/s42524-019-0042-3

摘要： The integration of building information modeling (BIM) and lean construction (LC) provides a solution for the management of megaprojects. Previous studies have generally focused on the theoretical or empirical adoption of BIM and LC. Moreover, only a few studies have examined the approach of simultaneously using BIM and LC in megaprojects. Therefore, an intensive study on the application of BIM and LC in megaprojects, particularly to explore considerably effective integrated application modes of BIM and LC in megaprojects, will substantially promote the management efficiency of megaprojects. The current study describes a method that integrates owner-dominated BIM and LC that was developed in a case study. The proposed method provides a framework for all stakeholders to use BIM and LC in a megaproject dominated by the owner. The interactional relations among the owner, BIM, and LC were analyzed and positive interactions were identified. These positive interactions served as a basis for the implementation of this integrated approach in a case study and could be applied to other megaprojects. The megaproject (i.e., airport construction project) was examined to verify the performance of the developed method. Results showed that the integration of BIM and LC dominated by the owner can improve management performance and achieve high quality standard.

关键词： building information modeling lean construction airports project management

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Numerical simulation of charge stratifications to improve combustion and NO formation of lean-burn SI

Zhijun PENG ,

《能源前沿（英文）》 2009年第3卷第3期页码 353-358 doi: 10.1007/s11708-009-0035-8

摘要： The influences of charge stratification on spark ignition (SI) engine combustion and NO emission were analyzed using a phenomenological model. The mixture in the cylinder was divided spherically into three parts: a central core with a stoichiometric air-fuel charge, a dilution region without any combustible charge, and a mixing region lying between the core and the dilution region. Three mixture stratification parameters such as the extent of dilution in the mixing region, the extent of combustible charge in the mixing region, and the gradient of stratification in the mixing region were investigated. The results indicate that the extent of combustible charge in the mixing region could reduce in-cylinder NO formation significantly, compared with the extent of dilution in the mixing region. As long as the degree of dilution in the mixing region is within the dilution limit of the combustible charge, the gradient of dilution has little effect on combustion and NO formation.

关键词： charge stratification SI engine lean-burn combustion NO emission