The Proposal of a New Method of Evaluation of Hard Coal Grindability
The new method of evaluation of grindability of hard coal and its blend is shown. Standard Hardgrove test is used as a base to work out this method. The essence of this method consists of simulation of milling process in close circuit (mill-classifier) and determination of energy consumption and quantity of product under the constant feed flow. The research equipment designed specially for this project is described New method of grindability measuring completes standard Hardgrove method withdrawing its faults: · bigger (c.a. 10 times) and more representative sample is used; · the milling process is carried out in close circuit (similarly to the industrial condition); · energy consumption of the milling process is determined for three samples, which differs in grain size.The new method of evaluation of grindability of hard coal and its blend is shown. Standard Hardgrove test is used as a base to work out this method. This method allows us to determine energy consumption of the milling process. The essence of this method consist of simulation of milling process in close circuit (mill-classifier) and determination of energy consumption and quantity of product under the constant feed flow. Our results will complete the Hardgrove method and will help us to better characterise coal. At the same time investigations in industrial scale are carried out.These investigations will verify this new method. Also a new mathematical model of the milling process is being elaborated. It will be used to predict behaviour of coals in industrial conditions.
Coal Grindability Test mill Hargroves test Energy consumption
B. Tora
Department of Mineral Processing and Environmental Protection, Faculty of Mining and Geoengineering,University of Science and Technology AGH, Krak(o)w, Poland
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
627-630
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）