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How to choose tracked mobile crushing plant for hard rock crushing?
【Summary Description】In the processing of manufactured sand and aggregates, it is crucial to have a thorough understanding of the properties of the source rock, such as the physical and mechanical properties of the rock, mineral composition, chemical composition and the processing performance index of the rock, mainly to understand the crushing work index and abrasion index, as an important reference index for the preliminary equipment selection, subsequent production and processing, and maintenance of the sandstone equipment. Simply speaking, it is the crushability and abrasiveness of rock processing performance.
In the processing of manufactured sand and aggregates, it is crucial to have a thorough understanding of the properties of the source rock, such as the physical and mechanical properties of the rock, mineral composition, chemical composition and the processing performance index of the rock, mainly to understand the crushing work index and abrasion index, as an important reference index for the preliminary equipment selection, subsequent production and processing, and maintenance of the sandstone equipment. Simply speaking, it is the crushability and abrasiveness of rock processing performance.
I. Crushability of rock
The crushing work index (WI) is usually used to characterize the crushability of rocks, which is closely related to the chemical composition of rocks, the development of joints (also understood as cracks in rocks), crystallization state and other factors. Hard quartzite, for example, is very difficult to break, and limestone is much easier. The crushability of rock affects the discharge particle size of crushing equipment, and then affects the selection of equipment. Generally, according to the range of crushing work index, the classification of rock crushability is 1422, which is very difficult to crush. Moderately crushable limestone is widely used in daily civil construction. Hard rocks commonly used in hydropower projects include plutonic igneous rocks (such as granite, syenite and diorite) and extrusive igneous rocks (such as basalt and diabase). A typical hard rock index commonly found in sand and gravel processing.
II. Abrasiveness of rock
Abrasion index AI and SiO2 content are usually used to measure the abrasiveness of rock, which is related to the hard mineral content (SiO2, orthoclase, etc.), crystal structure, raw material size, rock compressive strength and other factors. The abrasive property of rock mainly affects the life and wear cost of wear resistant parts during the operation of equipment, so the abrasive property of rock is an important parameter to determine the type selection of equipment. According to the rock abrasion index, the classification of rock abrasion is 0.40.8, and the abrasion is high.
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