Impact Crusher | Vertical Shaft Impact Crusher
The demand for high-quality manufactured sand is increasing in modern construction, road and infrastructure projects. As a core component of manufactured sand production, choosing the right sand making machine is crucial. Among numerous types of equipment, impact crushers, especially vertical shaft impact crushers (VSI), have become the preferred choice for many sand and gravel aggregate producers due to their superior performance. This article will provide an in-depth analysis of these two types of equipment to help you make informed investment decisions.
I. Equipment Overview and Working Principle
Structural diagram of vertical shaft impact crusher
1. What is an Impact Crusher?
An impact crusher is a broad concept, generally referring to equipment that uses the "stone-on-stone" or "stone-on-iron" impact principle to crush and shape materials. Its core is the use of a high-speed rotating throwing head to throw the material, causing it to violently impact the surrounding guard plate or the material itself, thereby achieving crushing and shaping.
2. The Core Position of the Vertical Shaft Impact Crusher
In the impact crusher family, the vertical shaft impact crusher (VSI) is currently the most technologically mature and widely used model. Its key feature is a vertically arranged main shaft. Material is fed from the top center, falls into the high-speed rotating rotor, is accelerated by the throwing head, and is thrown out through the peripheral flow channels, colliding with the surrounding material lining or impact blocks. It combines crushing, shaping, and stone powder control functions.
II. Core Advantages of Vertical Shaft Impact Crusher
Why Choose a Vertical Shaft Impact Crusher?
Compared to traditional hammer crushers or roller crushers, vertical shaft impact crushers offer unparalleled advantages:
1. Excellent Finished Particle Shape: Utilizing the "stone-on-stone" or "stone-on-iron" principle, the produced sand particles are cubic, with continuous gradation and extremely low needle-like and flaky content, greatly improving concrete strength and durability.
2. Adjustable Fineness Modulus: By adjusting the rotor speed, feed rate, and center/peripheral feed ratio, the fineness modulus of the finished sand can be flexibly controlled to meet different engineering standards.
3. High crushing efficiency and low energy consumption: High energy utilization rate, large crushing ratio, and unit product energy consumption is generally lower than equipment based on other crushing principles.
4. Multi-purpose: Not only can it be used for sand making, but it can also be used for medium and fine crushing of ores with medium hardness or less, achieving "integrated crushing and grinding".
5. Low operating cost: Core wear-resistant parts such as the throwing head and peripheral guard plates adopt a modular design, resulting in uniform wear, long service life, easy replacement, and controllable maintenance costs.
Vertical shaft impact crusher customer on-site operation
III. Successful Application Cases
Typical Case Sharing
A large-scale green building materials industrial park in China, in order to meet the demand for high-quality manufactured sand from the surrounding high-speed rail and commercial concrete plant, introduced two VSI-1145 vertical shaft impact crushers from our company, forming a three-stage closed-circuit crushing process with jaw crushers and cone crushers.
• Raw material: Granite (compressive strength ~150MPa)
• Finished product: 0-5mm high-quality manufactured sand
• Capacity: 120 tons per hour per unit.
Results: The produced manufactured sand has rounded particles, and its gradation meets the requirements of the national standard for medium sand in Zone II. The fineness modulus is consistently between 2.6 and 2.8, completely replacing natural sand. Customer feedback indicates a significant improvement in the workability and strength of concrete.
IV. Equipment Selection and Related Recommendations
How to Configure an Efficient Sand Making Production Line?
A high-efficiency vertical shaft impact crusher requires a reasonable production line configuration to achieve maximum efficiency. We recommend the classic three-stage crushing and screening closed-loop process of "jaw crusher + cone crusher + sand making machine":
1. Coarse Crushing: A jaw crusher is used for the first stage of crushing. Its robust structure and strong ability to handle large raw materials are excellent.
2. Medium and Fine Crushing: A cone crusher is used for the second stage of crushing. Its layered crushing principle produces more intermediate-sized aggregates, providing ideal feed for the sand making machine.
3. Sand Making and Shaping: The vertical shaft impact crusher (VHSC) is the core component, responsible for producing high-quality manufactured sand from the medium and fine crushed material. Some particles can be further shaped through closed-loop circulation.
4. Auxiliary Equipment: A complete production line is formed by a vibrating feeder, a circular vibrating screen, and a belt conveyor.
V. Frequently Asked Questions (FAQ)
Q1: Is an impact crusher suitable for processing ores of all hardness?
A: Not necessarily. The VHSC is best suited for processing materials of medium to low hardness (compressive strength generally not exceeding 250 MPa), such as limestone, granite, and river pebbles. While it can be used for extremely hard materials (such as basalt and diabase), it will accelerate the wear of wear-resistant parts. It is generally recommended to use a cone crusher for medium crushing to reduce the feed hardness.
Q2: What if the stone powder content is too high during equipment operation?
A: Stone powder content is a key indicator for manufactured sand. Our VSI sand making machines are typically equipped with an airflow circulation system and a fine powder separation device, which can effectively separate excess stone powder (e.g., <0.075mm particles) from the finished sand and control it within the target range (e.g., 6%-12%). Operation can also be optimized by adjusting the rotation speed and feeding method.
Q3: What are the advantages of a vertical shaft impact crusher compared to a traditional rod mill?
The demand for high-quality manufactured sand is increasing in modern construction, road and infrastructure projects. As a core component of manufactured sand production, choosing the right sand making machine is crucial. Among numerous types of equipment, impact crushers, especially vertical shaft impact crushers (VSI), have become the preferred choice for many sand and gravel aggregate producers due to their superior performance. This article will provide an in-depth analysis of these two types of equipment to help you make informed investment decisions.
About of Baichy Heavy Industry
Baichy Heavy Industry is a high-tech mining equipment company integrating R&D, manufacturing, sales, and after-sales service. Focusing on crushing, grinding, and mineral processing equipment, we provide professional solutions to our customers. We are ISO9001:2015 、certified, and our products include mobile crushing palnts, crawler crushing plant, construction waste crushing plants, jaw crushers, sand making machines, cone crushers, fine crushers, grinding mills, ball mills, etc., all with reliable performance to meet diverse project needs.
Our advantages:
• Professional pre-sales support: Free project design and comprehensive solutions to help you accurately select the right equipment;
• Comprehensive on-site service: Providing installation guidance and worker training to ensure smooth equipment commissioning;
• Reliable after-sales guarantee: A complete after-sales system, timely response to technical inquiries and equipment maintenance, ensuring long-term stable operation.
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