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.
Aspirin for Back Pain. The use of aspirin (acetylsalicylic acid) in some form is nearly as old as civilization itself. Hippocrates, and even the ancient Egyptians, used an early form of it (salicin, from the white willow tree) to treat pain and fever.