试论矿山环境治理工作重要性

我国经济建设中矿业的地位举足轻重,矿山开采对环境产生的影响更为严重。就矿山开发对生态环境的影响进行分析,阐述对其进行治理的重要性;就如何进行矿山治理、恢复生态环境提出具体方法和建议。     

对分宜县矿山环境现状及恢复治理的认识

矿业是分宜县经济发展的重要支柱,然而随着经济的快速增长,由矿业开发所导致的环境污染和生态破坏问题也与日俱增。为此,进行矿山环境的恢复治理工作,坚持"在开发中保护,在保护中开发"的原则,对矿产资源开发与生态保护实行统筹考虑、统一安排,最大限度地减少矿产资源开发利用过程中的环境污染和生态破坏,逐步治理历史遗留的矿山环境问题,构建"和谐矿山环境"乃是当务之急。本文主要介绍了分宜县矿山的主要问题及现状,并分析了问题出现的原因和治理方法。     

大气环境污染物监测相关问题探讨

社会经济的发展,人类生产活动日益频繁,规模不断扩大,工业发展脚步的加快也使大气环境的污染日趋严重。随着工业废气排放量的增加,大气环境的成分和分布比例发生了巨大的改变。为了保证大气环境的质量,对大气环境中的污染物进行监测十分必要。文章对大气环境污染物监测的原则以及布点采样等相关问题进行探讨,旨在控制大气环境的污染,保证大气环境质量。     

矿山地质环境保护与恢复治理研究意义及思路

目前,矿产资源开发利用在国民经济建设中的基础保障地位日益重要,对矿产资源已进行了大规模的开采。但是,矿山开发规范化管理力度跟不上矿产资源开发利用的增长速度,就使得大规模的矿产资源开发活动引发的矿山地质环境问题日益突出,已成为影响矿山正常生产和人居生态环境安全的重要因素。为了实现矿产资源开发与环境保护并重的绿色矿业目标,需要在合理开发利用矿产资源的同时,最大程度地减少、减轻矿业开发对矿山地质环境的负面影响,简述了矿山环境地质保护与恢复治理的研究意义、思路及路线,旨在有效保护矿山地质环境,实现资源开发与地质环境保护协调发展,提高资源开发利用率,避免和减少矿区地质环境破坏和污染,推进构建“和谐矿山环境”。     

浅谈矿山救护队技战术水平的提高

矿山救护工作是关系到矿山安全稳定发展的重要工作，随着经济体制和部分矿业系统内部发展不够协调，不够和谐，使部分地区矿山救护队存在着不少的问题。矿山救护队只有真正解决这些问题，充分利用现有条件，才能使其真正的提高技战术水平和实战效果，使自己在本职工作中为矿山安全事业做出更大贡献。     

辽宁省兴城市南陀矿业有限公司钼矿地质环境问题及治理

辽宁省兴城市南陀矿业有限公司钼矿矿山建设可能引发、加剧地质灾害和环境问题,解决这些问题方法措施主要有：设立警示牌、治理废水坑、植被恢复等。边开采边治理,保护环境,造福子孙。     

矿山地质环境问题及其保护对策探讨

矿业是我国的重要支柱产业。随着矿业的开发，矿山地质环境问题已经越来越引起人们的重视，对矿山的地质环境进行保护是非常重要的。基于此，在例举目前常见的矿山地质环境问题的基础上，总结了前人保护的经验和方法，分析了矿业开发中对地质环境问题的保护及其发展趋势，提出了综合保护矿山地质环境的综合方法。     

石灰中和法在酸性矿山废水治理中的应用

矿山废水造成附近水体及环境严重污染,为了保护水资源和矿区环境,必须采取有效的技术措施,使矿山废水净化。采用石灰中和法处理洛南县九龙矿业有限公司酸性矿山废水,通过半年多的运行检验表明,处理效果良好,出水达标,系统运行稳定。SS、COD、NIt3一N等去除率均达到90％以上。     

中国矿业现代化的战略思考

从掌握资源是矿业企业最基本的竞争力、构建生态矿业工程乃当务之急、信息化建设彻底改变矿山面貌三个方面阐述了我国实现矿业现代化的重要途径和发展战略。     

纸箱生产企业的清洁生产技术探讨

实施清洁生产的最终目的是从改革和优化生产工艺和技术设备,物料循环和废物综合利用等环节入手,不断加强管理和技术改造,提高能源、资源利用效率,减少废物量产生,减少污染物排放量,使企业实现经济效益和环境效益"双赢".其核心是提高原纸利用率、纸板生产线的技术改造和污染物排放的控制.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Synthesis of Alumina-Zirconia Nanocomposites by Solgel Process

Al₂O₃-ZrO₂ nanocomposites were developed starting with the solgel process. Composite alumina-zirconia nanopowders were synthesized from metallorganic precursors (Aluminium secondary butoxide and zirconium Iso propoxide) using the solgel process. The parameters affecting the synthesis—solvent, concentration of precursor, R/H ratio (i.e., dilution of water in solvent)—were varied as also the temperature and pH. BET and TEM were used to measure nanosize. Diffuse reflectance spectroscopy and also qualitative optical absorption led to identical particle size estimate. The variation of process parameters was used to study the effect and interdependence of process parameters. Artificial Neural Networks was used to rigorously analyze the process. Although this led to confirmation of interdependence of parameters, the presence of a single overwhelming solvent variable was also established. Then the optimal process was used to synthesize more nanopowder. To produce bulk nanocomposite the nanopowders were sintered by varying the temperature and time period. The sintered lithoids were probed with a vickers hardness tester to measure elastic modulus, hardness, and fracture toughness. The results showed high elastic modulus, modest hardness, and very high fracture toughness.     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Friction Stir Processing Strategies for Uniform Distribution of Reinforcement in a Surface Composite

Friction stir processing (FSP) is an important technique for preparing surface composites. Fabricating defect-free surface composites with uniform particle distribution by FSP is a challenging task. In this study, silicon carbide particles reinforced AA5083 alloy surface composites was fabricated using different FSP strategies including variation in process parameters, dual-tool processing and tool offset overlapping. Material flow of the processed material with reinforcement particles demonstrated that the distribution of particles was influenced by the stirring action of the probe as well as the extrusion of the plasticized material due to the movement of the tool. Process parameters, particularly rotational speed, showed a dominant influence on the distribution of silicon carbide particles.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.