A coal-fired power
plant is not only concerned with itsmain product, coal, but also with
many by-products, as the following graph shows. Hardox can be used to crush
coal, limestone and ash.
The grain size of the filled coal is about 30-100 mm. The entire coal must be
crushed to the final grain of 0-2 mm.
The comminution is generally carried out in two stages (two different types of
crushers). The first stage is generally the hammer breaker. The second stage is
the ventilation mill or the ball mill.
Coal is not just coal! Coal consists of about 30% of other minerals (quartz, pyrite, illite, chlorite, etc.).
These minerals are responsible for wear.
The slag must be crushed for further processing. Before crushing, the slag is
cooled with water so that it has a temperature of less than 100 °C.
Slag consists of SiO2 (quartz), Al2O3, CaCO3, Fe2O3. The main component is quartz.
Rollers (see pictures) are used for comminution. They are also called tooth
breakers. Hardox 500, Hardox 550 and Hardox 600 can be used with a thickness of
Due to the high quartz content Hardox 600 can be used. We also have good
experienc with Hardox 500!