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 These medicines can help when you get bad muscle spasms along with low back pain. 2  Side effects, such as drowsiness, are common. 3  Opiate pain relieversOpiate pain relievers.4  These are very strong medicines that are sometimes tried to ease sudden, severe back pain that has not been controlled by other medicines. Some of them also come in stronger doses. 2  For those, you'll need a prescription. 3  Muscle relaxantsMuscle relaxants. 4  These medicines can help when you get bad muscle spasms along with low back pain. 5  Side effects, such as drowsiness, are common. 6  Opiate pain relieversOpiate pain relievers.