The basic principle for coal preparation is to first liberate the coal particles from the gangue (quartz) and then, by applying different water based techniques, separate the coal particles and gangue particles.
Acetaminophen in the Treatment of Acute Low Back Pain. For low back pain, acetaminophen can be effectively used as an analgesic (or pain killer). Doctor-written article on acetaminophen as a pain reliever for lower back pain.
Most episodes of back pain are not serious and may be treated with: 1  Limited bed rest (no more than two days) 2  Acetaminophen (Tylenol and others) for pain or oral anti-inflammatory drugs, such as aspirin, ibuprofen (Advil, Motrin and others) or naproxen (Aleve, Naprosyn), for pain and inflammation.