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 Anti-inflammatory medication (such as ibuprofen, or possibly oral steroids), to reduce the local inflammation that is a cause of the pain. 2  See NSAIDs. 3  Muscle relaxants, which may be prescribed on a short-term basis to relieve severe lower back pain associated with muscle spasms. 4  See Muscle Relaxants.