West africa s commercial and industrial solar container spontaneous combustion

What causes spontaneous combustion of coal shale?

The second is geology of the material, particularly during the formation of the deposits. The self-heating of coal-shale has been reported to be the likely source of spontaneous combustion in selected bands of a coal seam, highwalls and spoil heaps in Witbank, South Africa (as shown in Fig. 1, Fig. 2, Fig. 3).

Is spontaneous combustion a hazard in coal mining?

Of the many dangers that occur during coal mining, the risk of spontaneous combustion is both highly dangerous and common. This hazard is reported most often during the process of collapsing longwall goaves. The significance of this threat is confirmed by the potential effects which coal self-ignition may cause.

What is spontaneous combustion?

Spontaneous combustion is defined as the chemical or biological process that generates sufficient heat to ignite the reacting material without an external ignition source, resulting from self-heating due to exothermic reactions. How useful is this definition? You might find these chapters and articles relevant to this topic.

Can a pile of coal spontaneously combust?

“Piles of straw, coal and even large manure piles can spontaneously combust.” Suppose a family member or friend had read this article and then asked you to explain what is meant by spontaneous combustion and how a pile of coal could suddenly burst into flames. How would you respond?

Is spontaneous combustion a fire hazard?

Spontaneous combustion often occurs in piles of hydrocarbon-soaked (oily) rags and can constitute a serious fire hazard. Fires started by spontaneous combustion are caused by the following mechanisms: (1) spontaneous heating, (2) pyrophoricity, and (3) hypergolic reactions.

Does ash content affect the liability of coal to spontaneous combustion?

It was observed that the liability of coal to spontaneous combustion decreases with increasing ash content and vice versa. Coal-shales SN and SE have the lowest ash contents compared with other coal-shales and have the highest self-heating rate. It is shown that coal-shales SH, SJ and SG have high ash contents and displayed slow self-heating rate.