Explain the process, the equipment used, and the problems encountered by miners who do this type of mining. Define the two main types of coal. Explain the differences between the two, and locate the main areas of coal mining.
Coal mill is major equipment of cement plant and used for drying and grinding coal. The equipment mainly consists of feed device, main bearings, rotating parts, drive device, selling device, highvoltage startup device and lubrication system.
Coal crushing machine is the main coal mining equipment used to crush coal into small pieces size. In coal mining industry, the usually used crushing machines are jaw crusher, impact crusher, hammer crusher and mobile coal crusher.
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Mining equipment is now more efficient because it saves energy and reduces the number of harmful chemicals needed to extract desired material from its surroundings. Heavy duty, weather resistant equipment is still necessary to extract, transport, and process minerals, ores, and precious metals from soil, sand, and rock.
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