Dense medium coal processing technology has been widely used in coal preparation industries in the world since it is the most accurate and efficient coal preparation process to obtain clean coal with a highest possible yield. Separation of coal and impurities using this technology is based on density differences. In literature, a number of mathematical models exist for dense medium cyclones. On...

The research results of coal characterization using the XPS method are summarized. Microsoft Visual Studio.net is utilized to build a database functional group characterization for coal, which contains over 1000 records including the kind of functional group, binding energy value, coal specie, producing area, sample preparation, and literature information. The database can be used to search and...

Coal preparation plant simulators are computer programs used to evaluate the performance of a preparation plant for given feed coal characteristics and the type of process flowsheet selected. However, none of the commercially available plant simulators attempts to maximize the overall plant yield for alternative flowsheets and also select the most suitable circuit configuration based on maximiz...

A simple thermodynamic analysis suggests that oil can spontaneously displace water from coal’s surface if the coal particle has a water contact angle greater than 90°. However, the clean coal products obtained from laboratory-scale dewatering-by-displacement (DbD) test work assayed moistures substantially higher than expected. These high moisture contents were attributed to the formation of wat...

Today coal is among the most important energy sources. In order to meet the world's energy demands, low-calorie lignite with a high ash content is generally used in the large capacity coal-fired thermal power plants. As a result of coal firing, wastes such as fly ash, slag, and flue gas are also produced. Subsequently, toxic trace elements within coal are transferred to wastes such as slag, fl...

Coal-Water Slurry (CWS) is an attractive alternative fuel with lower cost and reliable in terms of transportation and handling. The efficiency of CWS gasification depends on the preparation of CWS to ensure the higher carbon contents and low viscosity which will enhance the heating rates along with the atomization of CWS. In this paper, the rheology of CWS wa...

In the coal preparation plant, the run of mine coal undergoes a series of operations, including washing, wet screening, sedimentation and dewatering. The process requires the circulation of large volumes of water from which large volumes of waste water containing a variety of solid particles are generated. Clarification of the tailing water is often carried out in a thickener by adding suitable...

INTRODUCTION High blood pressure is the cause of almost 13 % of all deaths in the world. DASH (Dietary Approaches to Stop Hypertension) is "gold standard" in diet recommended by American Society of Hypertension, American Heart Association and Dietary Guidelines for Americans 2010 for reduction many CV risk factors including hypertension. Non-pharmacological treatment of hypertension through DAS...