1. Coarse crushing is generally used for open-circuit production. To process incoming materials from the stockyard, the commonly used primary crushing equipment includes a gyratory crusher and a jaw crusher.
(1) The feed particle size and processing capacity of the gyratory crusher are large, which can adapt to any rock crushing, run smoothly, and feed smoothly, but the process height difference is large, and the one-time investment is high, so when the processing scale is large. When using a gyratory crusher, it can reduce the number of equipment installations and simplify the process. In short, the larger the processing scale of the processing system, the more fully the superiority of the gyratory crusher can be reflected.
(2) The jaw crusher can be adapted to crush any rock. Due to its structure and free stroke, the processing capacity is relatively small, the product has poor grain shape, and the content of needle flakes is high, but when the requirements for aggregate are not very strict. And when the processing capacity is small, the choice of jaw crusher can save investment. Because the crushing is relatively small, it will increase the crushing load of the lower section, and the product has poor grain shape. It is necessary to increase the shaping step to obtain qualified finished materials. It is the first choice for small and medium-sized sand and gravel yards.
2. Medium and fine crushing. Medium and fine crushing generally adopt closed-circuit technology. Commonly used equipment includes impact crusher and cone crusher. The latter is divided into single-cylinder hydraulic cone crusher and multi-cylinder hydraulic cone crusher.
(1) The impact crushing product has good grain shape, low one-time investment, and is widely used, but it is only suitable for crushing rocks with medium hardness and low abrasiveness. Otherwise, the operating cost will increase greatly and the economy will decrease. At present, there are hard rock counterattack crushers on the market, but the operating cost is still relatively high. For hard rock crushing, cone crushers are better.
(2) Due to different types of cone crushers, their crushing force and crushing ratio are different. The current trend is to develop hydraulic cone crushers. In terms of comparison between multi-cylinder and single-cylinder, the former has higher overall performance. However, the choice of single cylinder or multiple cylinders in the entire process flow depends on the layout of the entire process. If the crushing ratio is large, a multi-cylinder hydraulic cone crusher can be used to reduce the number of crushing sections and reduce the system investment. The pin flake content is generally uniform below 18%. For crushing hard rock, multi-cylinder hydraulic cone crusher can also be used. For crushing general rock, single-cylinder hydraulic cone crusher can be used.
3. The first choice for sand making is the vertical impact crusher.
Vertical impact crushers are currently widely used in sand making equipment, with high production efficiency, good particle shape, low operating cost, and can play a role in shaping. The vertical impact crusher can be used in the high speed mode above 80 m/s, used for the fine crushing and shaping of coarse sand in the aggregate processing industry, so as to optimize the adjustment of the finished sand particle size gradation and make the sand fineness. The modulus can be smaller.
4. The commonly used sand washing and recycling equipment include bucket wheel sand washing machine, spiral sand washing machine, fine sand recycling machine, sand washing recycling integrated machine and so on.
5. Auxiliary equipment selection. Auxiliary equipment includes feeding, screening, silo, conveying, automatic control, etc.
In summary, there are many factors that need to be considered when configuring the sand and gravel production line. We must not only consider the feed size, the requirements of the finished aggregate, the lithology of the rock, but also the reasonable matching of the crushing and screening equipment and auxiliary facilities. At the same time, an automated control system must be selected. Reasonable technological production process and equipment configuration can make the sand production line reasonable, efficient and more economical. Luoyang Dahua Heavy Industry can provide you with one-stop production solutions, free installation, flexible customization based on user needs, and completion on schedule. Luoyang Dahua Heavy Industry will provide you with services such as free reception, inspection, consultation, and factory discounts for your visit to the factory. If you need to make an appointment or learn about the equipment's preferential quotation, model parameters, program design and other information, you can consult our customer service for free, or give. We leave a message and we will get back to you as soon as possible.
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