VSI8518 Sand-Making Machine for Andesite Quarries: An Integrated Solution for Hard Rock Sand Making and Aggregate Shaping

VSI8518 Sand-Making Machine

I. Overview: Why Andesite Quarries Need the VSI8518

Andesite is the most common parent rock for construction aggregates in the Pacific Ring of Fire. With a Mohs hardness of 6–7 and a compressive strength generally exceeding 120 MPa, it is highly abrasive. While it serves as a premium raw material for concrete and asphalt pavement, it is also notorious as "equipment killer"—if processed improperly, metal wear and poor particle shape can directly erode a quarry's profits.

The VSI8518 sand-making machine is a core unit specifically designed for these operating conditions. It employs a dual-chamber crushing principle combining "rock-on-rock" and "rock-on-iron" actions. It handles a maximum feed size of 40 mm (soft material) or 35 mm (hard material), delivering an hourly output of 100–130 tons via center feeding and 200–260 tons via combined feeding. Powered by dual 90 kW motors, it is compatible with 380V/50Hz power supplies, with 60Hz versions available upon request.

In andesite quarries, the combination of "jaw crushing (primary) + cone crushing (secondary) + VSI8518 sand making and shaping" has proven highly efficient. The VSI8518 handles the two critical stages of sand production and particle shaping, trading controllable wear-part costs for superior particle shape and a price premium for the finished sand.

Choosing the right andesite sand-making machine yields three quantifiable benefits: independent sand supply, a price premium for particle shape, and transparent wear costs. Compared to hammer-type sand makers, the VSI8518 offers longer wear-part life and superior particle shape when processing highly abrasive andesite; compared to double-roll crushers, it delivers higher sand yield and greater production capacity. These advantages explain why leading international manufacturers widely adopt the VSI approach for hard-rock sand production.

Andesite Sand-Making Machine

II. Application Scenarios: Four Typical Needs in Andesite Quarries

2.1 Andesite Manufactured Sand Production (Concrete Sand)

Andesite manufactured sand features a well-rounded particle shape and high durability, making it a premium raw material for commercial concrete plants and precast component manufacturers. The VSI8518 offers an adjustable discharge size of 0–5 mm; when paired with a sand washing machine to control silt content, the resulting sand exhibits a crushing value far superior to that of limestone sand. It commands a significant price premium—typically 10–20 RMB higher per ton—when used in high-grade concrete.

2.2 Shaping of aggregates for asphalt pavement and high-speed rail ballast

High levels of flaky and elongated particles in andesite coarse aggregates significantly compromise the mechanical properties of asphalt pavement and railway ballast. When utilized as a shaping machine, the VSI8518 reduces the content of flaky and elongated particles to below 10%, meeting the rigorous standards for highway surface layers and high-speed rail ballast; a single unit handles both sand making and aggregate shaping functions.

2.3 Secondary shaping of coarse aggregates in quarries

For quarries primarily producing coarse aggregates, the VSI8518 can be installed downstream of a cone crusher to shape only the 4–10 mm and 10–20 mm fractions. This enhances product quality and selling price without altering the existing process flow, resulting in a high return on investment.

2.4 Sand production from andesite offcuts and waste materials

Quarry overburden, screening tailings, and offcuts can be processed by the VSI8518 into fine sand suitable for masonry and plastering. This approach reduces the land footprint of stockpiles and alleviates environmental pressure while creating an additional revenue stream, aligning with "green mine" policy directives.

III. Core Advantages: Proven performance in andesite processing

3.1 Dual-chamber crushing to handle highly abrasive materials

The "rock-on-rock" mode causes andesite particles to collide with one another, resulting in significantly lower metal wear compared to the "rock-on-metal" mode and extending the service life of the rotor and throwing tips. When a higher sand yield is required, the machine can switch to a combined feeding mode, dynamically balancing wear rates and production capacity. For instance, when processing andesite with high SiO₂ content, metal wear in the rock-on-rock mode can be reduced by approximately 30% compared to the pure rock-on-metal mode.

3.2 Cubical particle shape: commanding a premium for andesite sand

High-speed centrifugal crushing subjects particles to multi-directional forces, yielding high-quality sand with a cubical shape and low elongated/flaky particle content, alongside an adjustable fineness modulus. For an andesite quarry with an annual output of 300,000 tons, the premium gained from superior particle shape alone can boost annual revenue by millions of RMB.

3.3 High-chrome wear parts: transparent and calculable wear costs

Throwing heads and wear liners are made of high-chrome alloy and feature a reversible design to extend service life. Replacement intervals can be estimated based on material abrasiveness and specified in procurement contracts; the wear cost per ton of sand is transparent, facilitating Total Cost of Ownership (TCO) calculations.

3.4 Oil lubrication station: ensuring continuous, heavy-load operation

Equipped with a standard hydraulic oil lubrication station featuring dual backup pumps and an automatic shutdown function in the event of oil supply failure. Andesite sand making involves heavy-load, continuous operation where bearing temperature control directly determines the interval between major overhauls; this oil lubrication system demonstrates exceptional stability, even in the hot and humid environments of Southeast Asian quarries.

3.5 Compact structure: seamless integration with quarry production lines

The unit measures 4,600 × 2,280 × 2,650 mm, and the hydraulic hood-opening design allows for rapid rotor maintenance. It can be incorporated into stationary production lines or integrated into mobile stations, leaving room for future capacity upgrades.

IV. Technical Specifications (VSI-8518)

Model Selection Comparison (Andesite hard rock application):

V. Application Case: Andesite Quarry Sand-Making Line in Indonesia

Indonesia is located along the Pacific Ring of Fire and possesses abundant andesite reserves; quarries on Java Island provide a continuous supply of aggregates and manufactured sand to Jakarta and its surrounding metropolitan areas. Baichen Heavy Industry has repeatedly delivered andesite crushing solutions to Indonesia. A typical configuration consists of "PE jaw crusher (primary crushing) + cone crusher (secondary crushing) + VSI8518 sand making and shaping + YK vibrating screen (grading)." The finished products include 0–5mm manufactured sand and multi-grade aggregates, supplying ready-mix concrete plants and highway projects directly.

This solution has proven effective for andesite processing in three key areas: stable sand yield under combined feeding modes, with crushing values ​​and particle shapes meeting high-grade concrete standards; controllable wear costs and low downtime, thanks to high-chrome wear parts and a dual-chamber design; and seamless compatibility with local 380V/50Hz power grids, ensuring stable production immediately upon commissioning.

VI. Costs and Returns: The Economics of Andesite Sand Making

The decision to adopt the VSI8518 in a quarry ultimately hinges on the margin between the comprehensive cost per ton of sand and the selling price. Taking an andesite sand-making line with an hourly capacity of 100–130 tons (center-feed mode) as an example, the cost structure is roughly as follows:

Equipment investment: VSI8518 main unit plus auxiliary screening, conveying, and sand-washing equipment;

Wear part costs: High-chrome thrower tips and liners; calculated at several yuan per ton of sand, this is the largest variable cost item for andesite processing—often exceeding twice the cost of electricity consumption;

Electricity consumption: Dual motors (2 × 90kW), with relatively stable power consumption per ton of sand;

Labor and maintenance: Primarily automated lubrication and routine inspections, representing a small proportion of total costs.

Comparing the aggregated costs against the delivered price of manufactured sand: in a market characterized by high sand prices and natural sand shortages, a 100-ton-per-hour line operating 6,000 hours annually (producing approx. 600,000 tons of sand) typically recoups its equipment investment within 1–2 years; this payback period is further shortened when factoring in price premiums for superior particle shape and revenue from recycled fines.

VII. Recommended Auxiliary Equipment (Complete Andesite Quarrying Line)

Extended Options: For clients with dispersed resources requiring multi-site operations, a truck-mounted VSI mobile sand-making station is available (eliminates civil works, enables rapid relocation). If also engaged in powder grinding, a Raymond mill or ball mill can be added for micro-powder processing.

VIII. FAQ

8.1 What is the production capacity of the VSI8518 sand-making machine when processing andesite?

Andesite is a hard material. Hourly capacity is 100–130 tons with center feeding (rock-on-rock impact) and 200–260 tons with combined feeding. Sand yield depends on feed size and moisture content; it is recommended to calculate based on "nominal capacity × 0.8" (allowing a margin), keep moisture content below 5%, and use a feed size under 25 mm to maximize sand yield.

8.2 Andesite is highly abrasive; what is the service life of the VSI8518 wear parts?

Throwing heads and liners are made of high-chrome alloy; service life depends on the andesite's SiO₂ content, feed size, and rotor speed. Under standard operating conditions, a reversible throwing head typically lasts several hundred hours per side; rotor speed can be reduced to extend life when handling highly abrasive materials. We recommend structuring warranty terms based on "wear cost per ton of sand" and keeping a spare set of wear parts on hand for rotation.

8.3 What is the most cost-effective configuration for an andesite quarry sand-making line?

A four-stage configuration of "Jaw Crusher + Cone Crusher + VSI8518 + Vibrating Screen" is recommended: the jaw crusher handles primary crushing, the cone crusher ensures stable feed for secondary crushing, the VSI8518 focuses on sand making and shaping, and the vibrating screen facilitates a closed-loop circuit for material recirculation. If the budget is limited and the raw material is low-abrasivity andesite, an impact crusher can replace the cone crusher; sand washing and fine sand recovery units can be added when sand prices are high. Regardless of the configuration, it is advisable to submit samples for crushability testing before finalizing the equipment model.

IX. Conclusion

The VSI8518 sand-making machine, designed for andesite quarries, utilizes a dual-chamber crushing principle, high-chromium wear-resistant components, and a thin-oil lubrication system. It effectively addresses the three major challenges associated with processing highly abrasive hard rock: sand yield rates, particle shape, and wear-related costs. Proven in real-world operations across Pacific Rim markets—including Indonesia—it represents a reliable choice for quarries seeking an integrated upgrade combining sand production and shaping.

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.

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