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Shale is a fine-grained sedimentary rock that is formed from the compaction of silt and clay-size mineral particles, known as mud. It is characterized by its laminated structure and can easily split into thin layers.
Crushing and grinding shale is essential for producing materials like shale oil, gas, and other by-products. The process involves several stages, each requiring specific types of machinery to achieve the desired size reduction and preparation of the shale for further processing.
Crushing and grinding machines are used to reduce the size of the shale particles and prepare them for further processing. These machines can be classified into two main categories: crushing machines and grinding machines.
Description: Machine consists of a series of hammers mounted on a rotating shaft.
Application: Primary or secondary crushing of large shale chunks.
Operation: The material is struck by the rapidly rotating hammers. The crushed material is then thrown against the breaker plates inside the machine, which further break down the material. The process continues until the material is reduced to the desired size and can pass through the openings in the grate bars at the bottom of the crusher.
Primary Crushing: Large shale rocks are fed into jaw or hammer crushers for initial size reduction.
Secondary Crushing: Cone or impact crushers further reduce the size of the material.
Screening and Classification: Crushed shale is screened to separate it into different-size fractions.
Grinding: The screened shale is ground into a fine powder using ball mills, hammer mills, ultrafine grinding mill, or vertical roller mills.
Classification: The ground material is classified to ensure uniform particle size using screens or air classifiers.
Collection and Packaging: The fine shale powder is collected and packaged for further processing or direct use.
By using the appropriate crushing and grinding machinery, the shale can be efficiently processed to meet the specific requirements of various industrial applications.
