Coal in Australia. Right now, coal is Australiaâs primary fuel source for generating electricity at around 73 percent. Black coal is found across Australia. Brown coal, sometimes called lignite, is a relatively soft material, which has a heating value of about one-quarter of black coal.
noun. The definition of abrasive is something that is harsh or rough, often to an unpleasant degree. An example of abrasive is the attitude of your boss who is always short tempered and yelling at you. Sand paper or SOS pads are examples of abrasives.
Abrasive liquids. An abrasive liquid contains substances, often minerals or inorganic substances, that are harder than the material they rub against. This abrasion will wear out and damage softer materials. An abrasive liquid contains substances, often minerals or inorganic substances, that are harder than the material they rub against. This abrasion will wear out and damage softer materials. Naturally occurring abrasives found in wastewater could be sand, stones, calcium carbonate or ferric oxide.