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.
Medications for back pain relief include: 1  Acetaminophen: It is reasonable to initiate treatment with acetaminophen (Tylenol), Hein says.  2 Acetaminophen is widely available, effective for many, safe in recommended doses, and cheap. 3  There are very few side effects.