UIS Analytical Services will close for its year-end recess at noon on 24 December 2015, and will open on 4 January 2016.
Please liaise directly with your dedicated UIS AS Head of Division if you are submitting samples close to the closing date and require your results before our recess:
Minerals Division (geological samples, inorganic analysis, waste classification, XRF): Japie Oberholzer at
/ 072 488 1001
Need help with waste analysis?
Recently new legislation was introduced which has placed more focus on ensuring stockpiles, mine dumps and general waste management are environmentally complaint.
With effect from 24 July 2015, the establishment and reclamation of mine dumps and stockpiles of mining waste from or incidental to a mining operation, must comply with new regulations regarding the planning and management of residue stock piles and residue deposits from a prospecting, mining, exploration or production operation (Mining Residue Regulations) published under the National Environmental Management: Waste Act 59 of 2008 (NEM: WA).
The implications of the new regulations furthermore are that stockpiles must comply with landfill requirements and also comply with the National Norms and Standards for the Assessment of Waste for Landfill Disposal, 2013; and National Norms and Standards for Disposal of Waste to Landfill, 201.
Chemical composition of the coal is defined in terms of its proximate and ultimate (elemental) analyses.
The parameters of proximate analysis are moisture, volatile matter, ash, and fixed carbon. Elemental or ultimate analysis encompasses the quantitative determination of carbon, hydrogen, nitrogen, sulfur and oxygen within the coal.
UIS Analytical Services can assist you with your proximate and ultimate analysis needs.
The calorific value Q of coal [kJ/kg] is the heat liberated by its complete combustion with oxygen. Q is a complex function of the elemental composition of the coal. Q can be determined experimentally using calorimeters. Dulong suggests the following approximate formula for Q when the oxygen content is less than 10%:
Q = 337C + 1442(H - O/8) + 93S,
where C is the mass percent of carbon, H is the mass percent of hydrogen, O is the mass percent of oxygen, and S is the mass percent of sulfur in the coal. With these constants, Q is given in kilojoules per kilogram.