ISO 561:1989(en), Coal preparation plant — Graphical symbols. The symbols included in this International Standard have been selected in accordance with the following principles: a) the items of plant listed should be widely used for coal preparation purposes and should be identified on flowsheets ;.
Coal Preparation Industry. In the early part of this century efforts to prepare coal were directed to sizing the coal to supply lump coal for domestic use and intermediate sizes for industrial use; the fines were usually rejected as unfit for sale.
Coal preparation is an important aspect of coal handling. When coal leaves a plant's coal handling system, it generally is sent to one of two places. Depending on the design of the plant, the coal may go directly to a boiler furnace to be burned, or it may go through coal processing equipment, such as a pulveriser, before it is burned.