Bottom ash is part of the non-combustible residue of combustion in a furnace or incinerator. In an industrial context, it usually refers to coal combustion and comprises traces of combustibles embedded in forming clinkers and sticking to hot side walls of a coal-burning furnace during its operation. The portion of the ash that escapes up the chimney or stack is, however, referred to as fly ash. The clinkers fall by themselves into the water or sometimes by poking manually, and get cooled.
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Famous quotes containing the words bottom and/or ash:
“If you think about it seriously, all the questions about the soul and the immortality of the soul and paradise and hell are at bottom only a way of seeing this very simple fact: that every action of ours is passed on to others according to its value, of good or evil, it passes from father to son, from one generation to the next, in a perpetual movement.”
—Antonio Gramsci (1891–1937)
“For it’s home, dearie, home—it’s home I want to be.
Our topsails are hoisted, and we’ll away to sea.
O, the oak and the ash and the bonnie birken tree
They’re all growing green in the old countrie.”
—William Ernest Henley (1849–1903)