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.
Epsom salts, and medicated bath salts, can be wonderful for lower back pain. Soaking in a hot bath on its own can be a help for many people, so the addition of the salts can work wonders on back pain. This is because the salts have almost magical ways of relieving muscles that are strained and stressed.