Crushing is the process of size reduction of ore. Size reduction process begins with usage of explosives at the area for production of ore. In later stages, the size reduction process performed with crushers before grinding in mills is called "crushing". Although there is no limit set, the downsizing process over 3 mm is considered as "crushing" and the ones below 3 mm are considered "grinding". Even though the ore is reduced below 3 mm with conical and some impact crushers, this process is called crushing.
The process of size reduction is defined by below conversion formula:
The ore whose size will be reduced + Energy = Reduced-size ore + Sound + Heat
The net energy used in size reduction is calculated by subtracting the energy transformed into sound and heat from the total energy consumed. Bake argued in 1964 that the energy spent on size reduction was only 0.6% of the total energy, and Austin’s estimate was less than 3%.
Although these ratios are not exact, it is a known fact that the energy spent in the size reduction process is a very small proportion of the total energy spent for this purpose.
For more information, please visit Chunlei.
Grinding is the last stage of the size reduction process after crushing. Grinding is carried out to free the different minerals contained in the ore, to provide the appropriate size and surface area for the enrichment process or the intended use. The grinding process can be dry or wet depending on the enrichment process, different grinders are used for proper grinding purpose.
Crushing and screening are two essential processes in the mining, quarrying, and construction industries.
Crushing refers to the process of breaking down large chunks of materials into smaller pieces. This is typically done using mechanical means such as crushers, which come in a variety of types and sizes depending on the nature of the material being processed. Crushers can be used to reduce the size of raw materials such as rocks, ore, and coal, as well as recycled materials like concrete and asphalt.
Screening, on the other hand, involves separating materials into different sizes or grades based on their particle size. This is typically done using screens or sieves that have different sized openings or mesh. Screening is important because it allows for the separation of materials into different categories based on their intended use. For example, materials that are too small or too large may need to be removed from the mix before they can be used in construction or manufacturing processes.
Together, crushing and screening form an important part of the overall process of extracting and processing raw materials. They allow for the efficient use of resources and help to ensure that the final product meets the necessary specifications and quality standards.
Want more information on crushing equipment? Feel free to contact us.