One method of quantifying moisture in coal is by measuring the weight loss of a sample after drying.
The MFS is used for this drying process and has a small heated chamber to provide the lowest practical Volume, minimum free space as required by the test practical standard.
A known mass of the coal is heated in a stream of nitrogen or air at temperature between 105’C and 110’C and maintained at this temperature until its mass is constant. The moisture content is calculated from the loss in mass of the coal
The Carbolite Gero coal drying range of ovens consists of the CDHT (Coal Drying High Temperature) with a normal operating temperature of 105’C and CDLT (Coal Drying Low Temperature) with a normal operating temperature of 30’C both being suitable for drying coal.
Air is calculated around the oven by two centrifugal fans. Ducts and air guides ensure that the airflow is horizontal across the chamber with air being directed over each of the seven tray levels. Adjustable inlet and outlet vents. The incoming air is pre-heated before it enters the work chamber. The maximum rate of ventilation is 3 volume changes per minute
Volatile matter in coal, the matter given off before oxidisation, refers to the volatile components of coal, except moisture, which are removed at high temperature in absence of air. This is usually a mixture of short and long chain hydrocarbons and some sulphur.
Volatile matter is determined as the loss in mass, less that due to moisture, when coal or coke is heated out of contact with air under standardised condition. The test is empirical and in order to ensure reproducible results, is it essenntial that the rate of heating, the final temperature and the overall duration of the test be carefully controlled. It is also essential to exclude air from the coal or coke during heating to prevent oxidisation. The fit of the crucible lid is, therefore, critical
The ashing process determines the amount of ash-forming material present in a petroleum product to enable a decision on it use in certain applications. Ash-forming materials are considered to be undesirable impurities or contaminants
Do you have a special order or need something specifically made for your business, or can't find the product that match with your business, we can help you!