Which crusher for lamproite diamond ore 55 tph in Angola

For diamond mining in Angola – particularly in the Lunda Norte and Lunda Sul provinces where lamproite pipes host significant diamond deposits – selecting the right crusher for 55 tph is critical. Lamproite is a soft to medium‑hard volcanic rock (Mohs 3‑4) but can contain hard xenoliths. The primary goal is to liberate diamonds without breaking them. The wrong crusher can fracture large stones, drastically reducing their value. When you ask which crusher for lamproite diamond ore 55 tph in Angola, a two‑stage circuit with a jaw crusher and a roll crusher is a widely used configuration. OCP Mechanical Company, a factory‑direct manufacturer with over 40 years of experience, supplies diamond‑friendly crushers for African mining conditions, backed by 24/7 online support.

Note: Product data are constantly updated; the latest specifications should be confirmed with our online customer service.

Primary crushing: a wide‑setting jaw crusher

The first stage in any diamond liberation circuit is a jaw crusher (Type J) with a relatively wide closed side setting (CSS). For 55 tph, a Type J-600x900 or J-750x1060 with a CSS of 50‑80 mm is a practical choice. The wide setting allows large lamproite rocks (up to 400‑500 mm) to be reduced to 80‑120 mm without over‑crushing diamond crystals. Many Angolan diamond mines have successfully used jaw crushers with CSS set at 1.5‑2 times the expected diamond size. A vibrating grizzly feeder ahead of the jaw scalps out fines below 30‑40 mm, reducing unnecessary crushing and further protecting diamonds. For lamproite with high moisture, a self‑cleaning feeder option is available.

The jaw crusher should use reversible Mn18%+Cr jaw plates – they offer 30‑50% longer wear life than standard Mn14% in abrasive lamproite gangue. Hydraulic CSS adjustment (optional) allows operators to quickly widen the setting if a large diamond is detected in the feed.

Secondary crushing: double‑roll crusher for gentle reduction

For secondary crushing, a double‑roll crusher (Type R) is strongly recommended over a cone crusher. Rolls operate at low speed (50‑150 rpm) using compression and shear, which is much gentler on diamonds than the impact or high‑compression forces of a cone crusher. For 55 tph, a double‑roll crusher with 45‑75 kW motors and a hydraulic gap adjustment system can accept feed up to 80‑120 mm and produce a product of minus 10‑20 mm. Smooth roll shells (rather than toothed) reduce point loading on diamond surfaces. Many Angolan diamond operations have successfully used double‑roll crushers for secondary and tertiary stages, reporting minimal diamond breakage.

A cone crusher (short‑head) may be used only if diamond size is known to be very small and the ore is very hard. For typical lamproite, the roll crusher is the more widely preferred choice.

All price information in this article is for reference only; contact our team for a current, site‑specific quote.

Key features that protect diamonds and lower operating cost

When you determine which crusher for lamproite diamond ore 55 tph in Angola, focus on features that preserve crystal value:

• Wide primary CSS (50‑80 mm) – Allows diamonds to pass without being crushed.

• Smooth roll shells – Reduces point loading on diamond surfaces compared to toothed rolls.

• Magnetic separator and metal detector – Removes tramp iron that could fracture diamonds.

• Soft starting (VFD) – Reduces mechanical shock during start‑up.

• Low crusher speed – For roll crushers, lower speed (50‑100 rpm) reduces impact energy.

• High‑quality wear parts – Mn18%+Cr jaw plates and hardened roll shells extend service life.

A complete primary jaw + secondary roll crusher line for 55 tph ex‑works typically ranges from $70,000 to $130,000 USD. Shipping to Angolan ports (Luanda, Lobito) (CIF) adds $10,000‑$18,000. Total landed cost is approximately $80,000‑$150,000 USD. Many Angolan diamond operations have recovered the crusher investment within 12‑24 months through improved diamond recovery.

How to select the right crusher for your lamproite operation

To answer which crusher for lamproite diamond ore 55 tph in Angola, provide OCP’s engineers with your lamproite characteristics: expected diamond size range, ore hardness, and clay content. For ore with large, high‑value diamonds, a jaw‑roll combination with a wide CSS and gentle compression is strongly recommended. For lamproite with only fine diamonds, a jaw‑cone circuit may be acceptable. OCP offers a free material test on your lamproite sample to recommend the optimal crusher type and setting. We also provide remote commissioning and operator training via video call.

Operational tips for diamond crushing in Angola

• Inspect product regularly – Use a dense medium separation (DMS) pilot to check for diamond breakage.

• Maintain a choke‑fed condition – Even in roll crushers, consistent feed prevents surges that could damage diamonds.

• Monitor roll gap or CSS weekly – Adjust as wear occurs to maintain product size.

• Keep spare parts on site – Jaw plates, roll shells, and bearings; shipping to Angola can take 4‑6 weeks.

• Use a dust suppression system – Lamproite can be dusty; water sprays help but avoid over‑wetting (which makes material sticky).

Why OCP is your trusted crusher supplier for lamproite diamond ore in Angola

Understanding which crusher for lamproite diamond ore 55 tph in Angola is only the first step – you also need a partner who backs you with technical advice and responsive support. OCP Mechanical Company has four decades of experience in crushing equipment for the diamond mining industry. Our 24/7 online team helps with crusher selection, setting optimization, and diamond‑saving practices. We keep common wear parts in our regional warehouse for fast delivery to Angola. We invite you to request a no‑obligation quote and experience factory‑direct pricing.

For a no‑obligation consultation on which crusher for lamproite diamond ore 55 tph in Angola, 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 provide free price quotes, equipment recommendations, and installation advice – helping you liberate diamonds more efficiently and profitably.