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.
OTC Muscle Relaxants for Back Pain. 1  Acetaminophen is a multi-purpose antipyretic medicine that reduces fever and eases pain. 2  Also referred to as paracetamol; acetaminophen has limited side effects and hence can be used safely.