Rare earth elements are an easy-to-find, hard-to-refine resource critical for everything from magnets and electronics to ...

A Russian thermal engineering institute has successfully tested the world’s first pulverized coal burner with a variable flame vector. The new type of vortex burner can adjust the flame direction ...

[3]Coal panels are up to 1250 ft. wide and 10,560 ft. long. Removing an average of 60 ft. of coal per day, a longwall shearer can mine a single panel in six months. [5] To reach the surface, coal ...