我国钒资源的生产及应用研究进展

文章介绍了我国钒资源的储量、分布以及生产情况，尤其重点介绍了从我国的独特钒矿——石煤中提钒的工艺及其发展，并列举实例介绍了新工艺的应用；此外，还介绍了钒在我国的应用情况以及供需现状和趋势。     

四通道旋风煤粉燃烧器的开发试制

四通道旋风煤粉燃烧器是由法国PILLARD公司引进的，用于水泥企业的回转窑中的消耗备件，国内很多科研单位开展了这方面的研制工作，取得一定的成效。本文就本公司在这方面所做的一些探索总结出来，供相关人员参考。     

催化剂对煤的燃烧特性影响的计算机辅助研究(IV)过渡金属类催化剂对于煤燃烧的催化机制和作用

催化剂对于煤的燃烧特性的影响，文献报道中大多以着火温度作为判别指标进行研究。本文使用气相色谱为分析手段，研究添加不同过渡金属类催化剂的煤的燃烧体系中气体的变化规律，从生成物的变化来探讨这些催化剂对煤燃烧的催化机制和作用。研究表明，部分过渡金属氧化物对煤的均相着火有较好的催化活性，能降低煤的着火温度；而另一部分则对煤的非均相着火有较好的催化活性，促进碳粒的完全氧化；一些过渡金属盐类对两者都有较高的催化活性。     

浅析连续采煤机故障检测技术研究

研究了采煤机在不影响生产的情况下故障检测方法，分析了采煤机故障振动检测、油液分析技术、声学检测法、人工智能和智能诊断、专家系统等方法的特点和应用，并对采煤机故障检测发展方向作了简单探讨。     

DTM350-600磨煤机大轴断裂分析

针对陕西渭河发电有限责任公司5号炉磨煤机乙磨大轴断裂失效进行了金属分析。结果表明应加强制造质量监控和实施设备全过程金属监督。     

Mapping of polished coal surfaces by automated reflectance microscopy

The capabilities of Rapid Scan, a system of automated reflectance microscopy, has been extended to the actual mapping of petrographic variation across polished coal surfaces. This is accomplished through computer control of a microscope stepping stage and the storage of binary reflectance data on disc in a matrix form which permits the proper spatial arrangement of values to be re-created. The maps depict lithotype variation, and the distribution of mineral occurrences, cracks and cleat. An image processor can be employed in further map analysis such as the compilation of reflectance profiles from selected areas.     

全国煤、煤矸石中核素含量数据库

本文介绍了全国煤、煤矸石核素含量数据库的设计思想,结构设计,数据库的界面及基本功能。该数据库采用Sybase数据库进行设计,用Power builder语言编程,实现关键字段查询、分类统计、打印输出、数据输入等功能。目前数据库收集了我国2043个煤、煤矸石及其它相关样品中天然放射性核素活度浓度水平数据。该数据库将为我国煤电能源环境评价提供基础数据。     

Performance of N95 elastomeric respirators in high humidity and high coal dust concentration environmentOA

High humidity and high dust concentration in deep coal mines may severely challenge the performance of respirators worn by coal miners.This paper aims at quantitatively evaluating the respirators used in deep coal mines and providing scientific guidance for the respiratory protection of miners.Based on the self-designed in-situ PM_2.5collector,controllable PM_2.5generator,human breathing simulator,and respirator simulation testing system,under the simulated deep mine working ...     

Longwall mining automation horizon control:Coal seam gradient identification using piecewise linear fittingOA

Horizon control, maintaining the alignment of the shearer’s exploitation gradient with the coal seam gradient, is a key technique in longwall mining automation. To identify the coal seam gradient, a geological model of the coal seam was constructed using in-seam seismic surveying technology. By synthesizing the control resolution of the range arm and the geometric characteristics of the coal seam, a gradient identification method based on piecewise linear representation(PLR) is proposed. To achi...     

Coal Flotation in Saline Water: Effects of Electrolytes on Interfaces and Industrial Practice

ABSTRACT

Coal preparation plants are increasingly turning to alternative sources of water to reduce their consumption of fresh water. These alternative sources can vary significantly in ionic content. This review discusses the effect of dissolved inorganic electrolytes on coal flotation. It is argued that increasing process monitoring will enable a better understanding of the effects of salts on the flotation process. A pragmatic approach in monitoring is essential to differentiate significant factors from insignificant ones controlling the performance of coal flotation units in salt water. The effects of inorganic electrolytes on the air–water interface and the solid–liquid interface are reviewed to assist in the interpretation of industrial results.