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.
Typically, muscle relaxants are prescribed early in a course of back pain, on a short-term basis, to relieve low back pain associated with muscle spasms. There are several types of muscle relaxant medications that are commonly used to treat low back pain.1  See: Pulled Back Muscle and Lower Back Strain.ypically, muscle relaxants are prescribed early in a course of back pain, on a short-term basis, to relieve low back pain associated with muscle spasms. There are several types of muscle relaxant medications that are commonly used to treat low back pain. 1  See: Pulled Back Muscle and Lower Back Strain.