龙口洼里褐煤矿肿瘤死亡情况调查

对龙口洼里褐煤矿进行了肿瘤死亡情况分析及劳动卫生学调查。

昭阳区褐煤矿地质沉陷区综合调查及治理措施

实施褐煤矿采煤沉陷区综合调查及治理是关系昭阳区发展大局的系统工程,通过地质调查及治理改造,努力实现环境重塑、改善民生、城镇一体化发展的“多赢”发展目标。打造一个经济活力涌现、开发统筹有序、城乡协调发展、社会和谐进步、生态环境良好的富饶秀美和谐昭阳。

由褐煤提锗尾矿制备的免烧陶粒及其性能实验

文章以云南临沧地区褐煤提锗尾矿为原料制备免烧陶粒,确定生石灰用量、水泥用量、原料含量、蒸养时间对免烧陶粒吸水率及颗粒强度的影响。通过XRD分析,在实验过程中生成了托勃莫来石,从而有利于提升陶粒强度。

哈萨克斯坦和世界的矿产资源

人类社会的发展,社会经济的进步,都与自然资源,尤其是矿产资源的利用有着密切的联系。矿产资源是工业生产的基础。根据其形成和成分,矿产资源基本可以分为三大类:基本燃料动力资源(石油、天然气、泥炭、煤、页岩、放射性材料等),金属(黑色金属、有色金属、稀有金属、贵重金属等),非金属(磷钙石、钾盐、砂石、粘土、卵石、碎石、石棉、石墨、滑石等)。

Sustainable development of lignite production on open cast mines in Serbia

Energy sector represents a key industrial branch for national, environmental and economic success. With its exclusive access to domestic deposits, lignite industry represents a guarantor of reliable raw materials, offering long-term supply security based on verified reserves. Currently operated coalmines in Serbia (Kolubara and Kostolac) have production around 36 million tons of lignite, and over 108 million m3 of overburden. Consequently, sustainability of lignite production requires cost reduction and environmental protection, as well as capacity increase. In order to rationalise, and increase efficiency of Serbian lignite mines, it is necessary to focus the activities on major issues shown within the triangle of energy policy objectives (security of supply, competi- tive prices and environmental protection). Production process optimisation singled out several special programs. Equipment revi- talization and modernization is necessary taking into account that majority of the currently operated machinery has a life up to 25 years. Production process automation would enable high level of technical operation in the field of open cast mines management. Lack of coal quality uniformity is the permanent problem resulting by great amounts of coal reserves to be used uneconomically. Planning and training at all levels and finally cooperative software for business procedures and work order management. The measures suggested are a key precondition for maintaining competitive position of lignite production on international level.

Adsorption of lignite humic acid onto magnetite particle surface

Modified humic acid (MHA) binder based on lignite humic substances is a novel sort of promising organic binder for iron ore pellets.Humic acid (HA) is one of the main ingredients of MHA binder.Pure HA was firstly isolated from lignite and then adsorption of HA onto magnetite particle surface was investigated.The final results indicate that the adsorption of HA onto magnetite surface accords with Langmuir model well,and it is evidently influenced by the initial HA concentration and solution pH value.Adsorption depends on chemical interaction at pH values above the PZC (the pH where the Zeta potentials of minerals are zero) of magnetite,while electrostatic attraction and chemical interaction both contribute to the adsorption at pH values below the PZC.

Ecological Research of Former Brown-coal Quarry-the Most Lake in the Czech Republic

The presented article discusses the results of survey of the Most lake, which was created within hydric recultivation of the site of the former brown-coal mine Most Lezaky in northern Bohemia in the Czech Republic. The survey discovered plants which belong to ruderal, wetland, halophilic and xerothermal species based on their life strategy. The discovered endangered species include Carex secalina, Schoenoplectus tabaernemontani, Salsola call subsp. Rosacea and Tetragonolobus maritimus. A total of 350 species of vascular plants were discovered in the study area. During the monitoring, a total of 146 bird species were discovered. The monitored location can be currently considered as a significant gathering place namely for aquatic and wetland bird species during the winter period and the migration period （e.g., Tachybaptus ruficollis, Podiceps cristatus, Anser anser, Anas platyrhynchos, Anas strepera, Fulica atra and various species of Larus sp.） and as a significant area of occurrence of relatively rare species bound to anthropogenetically disturbed areas of mining and post-mining landscape （e.g., Anthus campestris, Anthus pratensis, Motacillaflava, Oenanthe oenanthe, Saxicola rubetra and Saxicola torquata）. Within the monitoring of the water quality, the saprobic index values （S） ranged in 2013 between 1.62 and 1.92.

Effect of temperature and stress on molecular structure and carbon monoxide generation of lignite from Kailuan mining area

In order to analyze the origin of carbon monoxide(CO) in coal seams, stress–strain experiments under temperature of 50, 150 and 250 °C were conducted using lignite from Kailuan mining area. Fourier transform infrared spectroscopy and elemental analysis were carried out before and after deformation of the samples. The results indicated that CO generated at 150 and 250 °C; the gas component was mostly oxygen(O_2), with small amount of carbon dioxide(CO_2), methane(CH_4) and hydrogen(H_2). At 50 °C, O_2 and a little CO_2 were observed and no CO was found. The carbon content of the coal samples increased slightly after deformation, and the oxygen content, H/C ratio, and O/C ratio decreased. The molecular structure of coal displayed different evolution characteristics at various temperatures. At 50 and 150 °C, the falling off of side chains, broken of ether bond and directional realignment of the aliphatic chains resulting in the formation of long chains were the main performance of coal molecular structure evolution. While at 250 °C, the side chains fell off and short chains formed. Furthermore, at both 150 and 250 °C, condensed degree of aromatic ring increased. Under the action of temperature and pressure, CO forms in two ways.The first is that ether bond breaks, oxygen and carbon atoms combine together and forms CO, or O_2 forming in the broken of ether–oxygen bond leads to the oxidation of free radicals and resulting in the formation of CO. And the second is that CO derives from falling off of C=O group.