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.
1 Massage, which can help promote blood flow in the lower back (to help with healing), loosen tight lower back muscles, and release endorphins, the bodyâs natural pain killers. 2  See Massage Therapy for Lower Back Pain. 3  Chiropractic.