River Pebble to Manufactured Sand 300 tph with Particle Grading

Converting river pebble to manufactured sand 300 tph with particle grading requires a well‑designed crushing circuit that controls both capacity and gradation. River pebble is hard (7‑8 Mohs) and round, which makes it difficult to crush but excellent for producing high‑quality sand. Below we explain the key stages and how OCP Mechanical Company helps you achieve consistent particle grading.

1. Why River Pebble Is Challenging Yet Rewarding

Processing river pebble to manufactured sand 300 tph with particle grading is demanding because of the pebble’s high silica content (often >90%) and round shape. The roundness reduces inter‑particle crushing efficiency, requiring more impact energy. However, the resulting sand has a cubical shape and low flakiness, which is highly valued in concrete production.

OCP offers the Type R sand line, which includes a jaw crusher, cone crusher, vertical shaft impactor (VSI), and multi‑deck screens. Note: Product data are constantly updated; for the latest specifications of Type R, please contact our online customer service.

Typical equipment for river pebble to manufactured sand 300 tph with particle grading (for illustration only; actual data subject to continuous improvement):

• Primary: Type J jaw crusher (feed opening 1,100x1,300 mm)

• Secondary: Type C cone crusher (short head, CSS 10‑15 mm)

• Tertiary: Type V VSI (rock‑on‑rock, rotor speed 1,500‑1,700 rpm)

• Screens: Two units (2 decks each) for closed circuit and final grading

The above values are for illustration only. OCP continuously improves its products. Contact our online team for the most current data sheet.

Many sand producers in Vietnam, Indonesia, and India have adopted this configuration, reporting consistent sand gradation meeting Zone II or Zone III standards.

2. Controlling Particle Gradation at 300 tph

Achieving river pebble to manufactured sand 300 tph with particle grading requires precise control of crusher settings and screen apertures. The target gradation typically follows ASTM C33 or local standards, with 80‑90% passing 2.36 mm and controlled fines (5‑10% passing 0.075 mm).

To optimize your gradation, we recommend:

• Use a two‑stage classification – A primary screen after the cone crusher separates 0‑20 mm for the VSI, and a secondary screen after the VSI splits sand into multiple fractions (0‑0.6 mm, 0.6‑2.36 mm, 2.36‑5 mm). Recombine or sell separately as needed.

• Adjust VSI rotor speed – Higher speed (1,700‑1,800 rpm) increases fines and improves shape; lower speed (1,400‑1,500 rpm) produces coarser sand. Fine‑tune based on sieve analysis.

• Control feed size to VSI – Keep feed between 5‑25 mm for best results. Oversize (>30 mm) reduces tip life and increases recirculation.

OCP’s Type V VSI features a variable frequency drive (VFD) for easy speed adjustment and a rock‑on‑rock chamber that minimizes metal contamination. Many operators find that with proper feed control, a set of tungsten carbide tips lasts 80‑120 hours when processing river pebble. Actual tip life varies with pebble hardness and feed size – please ask our engineers for a site‑specific estimate.

To maintain consistent grading, we recommend:

• Sampling product sand every 50 hours for sieve analysis.

• Inspecting VSI rotor tips and feed tube weekly.

• Keeping a log of rotor speed vs. gradation for future reference.

As a direct‑selling manufacturer, OCP provides factory pricing on wear parts and can ship to major ports within 15‑25 days.

3. Why OCP Delivers Reliable Gradation and Low Cost

Selecting a solution for river pebble to manufactured sand 300 tph with particle grading is about balancing capacity, gradation, and wear cost. OCP Mechanical Company has over 40 years of history in hard rock crushing. We offer:

• Free pre‑sale testing on your river pebble sample to predict wear rates and optimal VSI speed.

• A customized flow sheet with screen apertures tailored to your target gradation (e.g., Zone I, II, or III).

• 24/7 online technical support for installation, parameter tuning, and troubleshooting.

Our Type R sand line has been successfully deployed in river pebble projects across Southeast Asia, South America, and the Middle East. Customers often highlight the consistent particle grading, low wear cost, and economical price.

Note: Actual gradation depends on feed material and operating conditions. We recommend on‑site trials for critical projects.

For a no‑obligation quotation and a detailed specification sheet of our river pebble to manufactured sand 300 tph with particle grading system, simply click the live chat icon on this page. Our online customer service team is available 24 hours a day, 7 days a week, to answer your technical questions, provide free advice on sand grading, and help you produce high‑quality manufactured sand from river pebble.