نتایج جستجو برای: coal recycling

تعداد نتایج: 61641  

ژورنال: مرتع 2023

Background and objectives Mining results in degradation of rangelands ecosystem structure and function. Coal mining in rangelands produces significant quantities of waste dumps in mining area which are considered as the main environmental pollutants in the site and surrounding ecosystems. Vegetation restoration in mining area could reduce soil pollution and could be of great help in restoring ...

2016
Yonghua Li Jun Wang Weiping Yan

In China, coal combustion to generate electric power is the primary method, the energy-saving and emission reduction is the urgent task. At present, the energy-saving dispatching trial method in some area evaluates energy-saving and emission reduction of coal combustion power generation according to power supply coal consumption rate only. But the power supply coal consumption rate can’t reflec...

2003
Michael P. Evans

and ECA coal analysers have been used to control sorting and blending operations at coal mines, power plants and coal terminals. In sorting operations, the analyser results are used to sort coal into piles, bins or silos based on the measured quality. Coals can be sorted by the ash, sulphur, moisture, heating value, or by combinations of these. Sorting can be used to allow low-ash coals to bypa...

2015
Yanming Wang Guoqing Shi Zhixiong Guo

Spontaneous combustion of subsurface coal is an extremely complicated chemical and physical changing process. In order to quantitatively understand the development of underground coal fires, the heat transfer processes coupled with multi-stage oxidation of coal are investigated by experimental and numerical methods in this paper. With controlled temperature and under lean oxygen conditions, the...

2011
Zongxi Liu Qilan Zhao

The scale planning of the coal logistics center plays an important role in coal logistics network planning. Based on the coal logistics network planning, this paper analyses the coalmine production capacity, transportation capacity, coal demand and other factors, then brings forward the demand trend coefficient on that basis. Further, the authors construct a scale-planning model for the coal lo...

2016
Noemi Arena Philip Sinclair Jacquetta Lee Roland Clift

The chill-on-demand system is a new technology designed to provide cooled products on demand, thereby avoiding chilled storage. It uses the cooling effect provided by endothermic desorption of carbon dioxide previously adsorbed onto a bed of activated carbon and has the potential to be applied to any type of product that needs to be cold at the point of consumption. The principles of life cycle...

2003
W. Kotze F. W. Petersen

Environmental protection has become the focus of world-wide research in the gold mining industry and favours the development of environmentaly sound processes, such as the Coal Gold Agglomeration (CGA) process, which is an alternative to existing gold processing methods, such as cyanidation and mercury amalgamation. The CGA process was developed and patented by the British Petroleum (BP) resear...

2014
Stefano Besco Alberto Bosio Mariangela Brisotto Laura E. Depero Alessandra Lorenzetti Elza Bontempi Renato Bonora Michele Modesti

This paper reports the results on the use of an innovative inert, based on stabilized fly ash from municipal solid waste incineration as a filler for polypropylene. The starting material, which contains large quantities of leachable Pb and Zn, was stabilized by means of an innovative process using rice husk ash as a waste silica source, together with other fly ashes, such as coal fly ash and fl...

Background and Objectives:  Paper recycling saves energy, and it is an example of resistance economy. Therefore, the purpose of this study was to determine knowledge, attitude and practice of Sari Training Hospital personnel on paper recycling and resistance economy. Materials and Methods: In the present descriptive study, conducted in 2017, 151 staff of Sari Training Hospital were selected in...

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