Which crusher for kimberlite diamond ore 48 tph in Botswana

For diamond mining operations in Botswana – home to world‑class deposits such as Jwaneng, Orapa, Letlhakane, and Karowe – processing kimberlite ore at 48 tph requires careful crusher selection. Kimberlite is a soft to medium‑hard volcanic rock (Mohs 2‑4) that often contains hard xenoliths (e.g., garnet, pyroxene) and, most importantly, valuable diamond crystals. The primary goal is to liberate diamonds without breaking them. Choosing the wrong crusher can fracture large stones, drastically reducing their value. Knowing which crusher for kimberlite diamond ore 48 tph in Botswana helps you balance throughput, diamond protection, and operating cost. OCP Mechanical Company, a factory‑direct manufacturer with over 40 years of experience, supplies crushers designed for diamond‑friendly applications, 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 48 tph, a Type J-600x900 or J-750x1060 with a CSS of 50‑80 mm is a practical choice. The wide setting allows larger kimberlite rocks (up to 400‑500 mm) to be reduced to 80‑120 mm without over‑crushing diamond crystals. Many Botswana 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 kimberlite 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 kimberlite gangue. Hydraulic CSS adjustment (optional) allows operators to quickly widen the setting if a large diamond is detected in the feed. OCP’s Type J jaw crushers are engineered with a deep crushing chamber to handle slabby kimberlite without bridging.

Secondary crushing: roll crusher vs. cone crusher

When deciding which crusher for kimberlite diamond ore 48 tph in Botswana for secondary reduction, two options exist: a double‑roll crusher (Type R) or a short‑head cone crusher (Type C). Each has different effects on diamond integrity.

• Double‑roll crusher – Widely considered a diamond‑friendly choice because it uses compression and shear rather than impact. Rolls can be set with a gap of 8‑15 mm, producing a product of minus 10‑20 mm. The slow, uniform compression reduces the risk of shattering large diamonds. Roll shells are available in smooth or studded designs. Many Botswana diamond operations prefer roll crushers for secondary and tertiary stages.

• Cone crusher – A short‑head cone crusher with a fine cavity and a CSS of 6‑10 mm can produce a finer product (P80 6‑12 mm) but generates higher impact forces, which may break diamonds. It is generally used only when the diamond size is known to be small and the ore is very hard. For typical Botswana kimberlite, a roll crusher is the more widely recommended choice.

For 48 tph, a double‑roll crusher with 45‑75 kW motors and a hydraulic gap adjustment system is a practical solution. Ex‑works price ranges from $40,000to$70,000 USD (for reference only). A cone crusher would range from $45,000‑$80,000.

Key features that protect diamonds and lower operating cost

When you evaluate which crusher for kimberlite diamond ore 48 tph in Botswana, 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.

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

A complete primary jaw + secondary roll crusher line ex‑works typically ranges from $70,000to$130,000 USD. Shipping to Durban or Walvis Bay then overland to Botswana adds $10,000‑$20,000. Total landed cost is approximately $80,000‑$150,000 USD. Many Botswana diamond operations have recovered the crusher investment within 12‑24 months through improved diamond recovery.

How to select the right crusher for your diamond operation

To determine which crusher for kimberlite diamond ore 48 tph in Botswana, provide OCP’s engineers with your kimberlite 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 (primary) and gentle compression (secondary) is strongly recommended. For kimberlite with only fine diamonds, a jaw‑cone circuit may be acceptable. OCP offers a free material test on your kimberlite 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 Botswana

• Inspect product regularly – Use a sieve and 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 Botswana can take 4‑6 weeks.

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

Why OCP is your trusted crusher supplier for kimberlite diamond ore in Botswana

Understanding which crusher for kimberlite diamond ore 48 tph in Botswana 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 Botswana. We invite you to request a no‑obligation quote and experience factory‑direct pricing.

For a no‑obligation consultation on which crusher for kimberlite diamond ore 48 tph in Botswana, 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.