This article describes the washability characteristics of a typical non coking coal from the Ib Valley Coalfields aiming at 34% ash level in the clean coal as per the stipulations laid by environmental gazette notification of the Government of India. Conventional float-and-sink testing was used to determine the yield of clean coal.
September 1, 2006 Standard Test Method for Determining the Washability Characteristics of Coal 1.1 This test method describes procedures for determining the washability characteristics of coarse-coal fractions and fine-coal fractions. Each sample being tested can have more than one coarse-coal... ASTM D4371-91 (1998) January 1, 1991
Bituminous Coal - an overview | ScienceDirect Topics. The behavior of raw coal in a wet washer can be predicted from laboratory simulation tests known as float and sink test and washability test. A sample of the coal to be cleaned is immersed in a liquid of specific gravity 1.6 which may be either CCl 4 or an aqueous solution of CaCl 2.
Washability analysis determines the density of coal as well as the quality of coal to simulate what the mine can expect once the coal is mechanically cleaned thru a coal preparation plant. This testing will accurately separate the carbon, non-carbon, and impurities to evaluate the total coal product.
The washability curve is drawn in accordance with the results of the float-and-sink test, which is used to reflect all the density level or any density distribution of coals and it is the necessary mean to understand the washability, evaluate, predict, and optimize the effect of gravity separation of raw coal.
Discovering Canada's Coal resources Intersected 23 metres of Black Coal - Border property 50km north of the town of Hudson Bay, SK ... Link Library Photos. Message: Reports Positive Results for Border Coal Initial Washability Tests Reply New Message. Back To Forum List View. Clavis. Rank: President Points: 26378 Votes: 242 Score: 3.6 Your ...
The combined yield of clean coal at 17% ash was 65.5% when the two fractions are washed at sp.gr. cuts of 1.43 and 1.52 and the direct ash are 22.5% and 31%, respectively. Yet at the same specific gravity (sp.gr.) of cut (1.48), the corresponding yield becomes 70% with the direct ash of 27% for both the fractions.
coals are spread in two major coal fields namely: Talcher and Ib Valley. The coals contain high ash wherein the extraneous material was intimately mixed in the coal matrix during the formation stage, causing a high level of impurities in the Run-of-Mine (ROM) material. These coals possess difficult to very difficult washability characteristics.
PETC performed the testing on coal crushed to 1-1/2 in. x 0, 3/8 in. x 0, and 14 mesh x 0. UNDERC is gathering data on the fractions sized to 65 mesh x 0, 200 mesh x 0, and 325 mesh x 0. To date, UNDERC has tested 48 samples and selected results of the study on some of those fine-sized samples are presented in this paper.
the bands and non-coal minerals within the coal seams. A number of physico-chemical techniques of coal beneficiation are currently available but every tool is not suitable for all the coals. Nasir et al(2010; 2012) have observed through their investigation that the coals of Pakistan (Azad Kashmir) are amenable to washing using gravity
Standard Test Method for Determining the Washability, - Know More. ﬁne-coal fractions, this test method may not be applicable for low-rank coals for reasons explained in 12 52 The usefulness of this test procedure and the usefulness of the results derived from washability testing are directly related to the care exercised in developing and following the sampling regime while taking into ...
Potential implications of mine dusts on human health A, Miners and people living in the Ib valley coal field of India were inhaling fine dust particles of up to 5 181 m in size and as a result asthma and bronchitis have become a major problem of this community 10 In Talcher region of India, high levels of mine dusts from coal fields and other associated minerals were responsible for the ...
Chandrasekhar, S and Sarkar, B and Das, Avimanyu and Chattoraj, U S and Kumar, Vinod and Rao, K V and Bhattacharyya, K K (2007) Analysis of the washability characteristics of low-volatile Indian coking coal with crushing at different top sizes - a case study. In: Advanced Gravity Separation, Aug 30 - Sept 1, 2007, NML Jamshedpur.