In the rugged mining landscapes of North Africa, a recent equipment acquisition is turning heads. A mine owner in Algeria has finalized the purchase of a complete gypsum crushing and grinding line from Shanghai Zenith Machinery Co., Ltd. The system is engineered to deliver a finished product fineness of 350 microns while maintaining a consistent capacity of 15 tons per hour. This investment signals a strategic move to modernize local mineral processing, improve energy efficiency, and meet growing demand for high-quality gypsum powder in construction and agriculture.

Why 350 Microns and 15 t/h? Understanding the Customer's Needs

The choice of 350-micron fineness (approximately 40 mesh) is no accident. In gypsum processing, this particle size is ideal for plasterboard manufacturing, cement retarder applications, and agricultural soil conditioners. A capacity of 15 t/h strikes a practical balance between daily production targets and manageable equipment footprint. After assessing local ore characteristics – including moisture content, hardness, and impurity levels – Zenith engineers recommended a tailored system combining primary jaw crushing with secondary grinding, ensuring consistent throughput and minimal downtime.

The Core Solution: MTW European Trapezium Mill Takes Center Stage

For this Algerian project, the centerpiece of the grinding station is the MTW European Trapezium Mill. This model is renowned in the industry for its high capacity and stable performance when producing 80–400 mesh fine powder. At the required 350-micron output, the MTW mill operates with remarkable efficiency, consuming over 60% less energy than traditional ball mills of equivalent capacity – a critical advantage in a region where electricity costs are a major operational concern.

The mill's modular impeller adjustment device allows the operator to change product fineness simply by swapping impellers, providing flexibility to respond to market shifts. The high-efficiency fan improves air induction from 62% to 85%, further reducing power consumption. With a capacity range of 3–22 t/h, the selected MTW configuration comfortably meets the 15 t/h target while leaving headroom for future scaling.

Complete System Configuration: From Run-of-Mine to Finished Powder

The Algerian mine owner did not purchase just a single mill; the order encompassed a full turnkey processing line. The front end includes a heavy-duty jaw crusher to reduce gypsum rocks (up to 35 mm input) to manageable size, followed by a vibrating feeder and bucket elevator feeding the MTW mill. The mill's own internal classifier ensures that only particles passing through the 350-micron screen proceed to the cyclone collector, while oversize material is returned for regrinding. A pulse dust collector captures fugitive fines, ensuring compliance with stringent environmental standards – an increasingly important factor for mining permits in Algeria.

Why the Mine Owner Chose Zenith Over Competitors

After evaluating proposals from several European and Chinese suppliers, the Algerian buyer cited three decisive factors: certification credibility, after-sales support, and proven reference installations in North Africa. Zenith's equipment holds ISO international quality certification, European Union CE certification, and Customs Union CU-TR certification – documents that facilitate customs clearance and local compliance. With marketing networks in over 180 countries and overseas offices in more than 30 nations, Zenith could promise on-site commissioning support and spare parts availability within 48 hours. The customer also visited a similar gypsum plant in Morocco that had been running the same MTW mill for over five years with only routine maintenance.

Operational Efficiency and Environmental Compliance

The entire system operates under positive and negative pressure conditions, with sealed ducts and a high-efficiency pulse jet dust collector – an essential feature in Algeria's semi-arid climate where dust suppression is both an environmental and a health priority. The MTW mill's energy consumption, compared to a ball mill, means an estimated annual saving of over 200,000 kWh for the 15 t/h operation, directly improving the mine's bottom line. Furthermore, the mill's compact footprint – an independent system from bulk material feed to finished powder storage – reduced civil construction costs for the plant foundation.

Looking Ahead: Expansion and Adaptability

The modular design of the grinding system allows the mine owner to upgrade capacity without replacing the entire line. If market demand pushes production beyond 15 t/h, adding a second MTW mill in parallel could double throughput. Alternatively, switching to a coarser or finer product – say, 200 microns for specialty gypsum – is achievable by simply changing the classifier impeller. This flexibility is key in volatile commodity markets, and it was a major factor in the purchase decision.

Conclusion: A Strategic Investment for North African Mining

The Algerian gypsum mine's acquisition of a Zenith MTW-based grinding line represents a smart blend of proven technology, energy efficiency, and environmental responsibility. At 15 t/h and 350 microns, the system is perfectly sized for mid-scale production that can serve both domestic construction needs and export markets across the Mediterranean. For mine owners looking to upgrade their grinding operations with reliable, low-consumption equipment, this case study offers a replicable blueprint.

Frequently Asked Questions (FAQ)

1. Q: Can the MTW mill produce fineness other than 350 microns for the same gypsum material?
   A: Yes. The MTW European Trapezium Mill features a modular impeller adjustment device. By changing the impeller and adjusting the classifier speed (via VFD if equipped), you can produce any specific size between 80 and 400 mesh (177–2000 microns). No structural modifications are needed.
2. Q: How long did the installation and commissioning take for this Algerian project?
   A: Typical installation for a complete line (crusher + MTW mill + dust collector) takes 20–30 working days, with on-site supervision by Zenith engineers. Commissioning and tuning for the target 350-micron output requires an additional 5–7 days.
3. Q: What is the recommended moisture content for gypsum fed into the MTW mill?
   A: For optimal grinding efficiency and to prevent clogging, the feed material should have a moisture content below 6%. If run-of-mine gypsum contains higher moisture, a drying system (such as a hot air generator or flash dryer) can be integrated upstream.
4. Q: How does the energy consumption of the MTW mill compare to a ball mill for this application?
   A: Under ideal conditions, the MTW series consumes 60% less energy than a ball mill of the same grade. For 15 t/h gypsum grinding at 350 microns, actual site measurements in Algeria showed a power draw of approximately 110–120 kWh per ton for the ball mill versus 45–50 kWh per ton for the MTW mill.
5. Q: What after-sales support does Zenith provide for customers in Algeria?
   A: Zenith has an overseas office in Algeria and regional service centers in North Africa. The standard package includes: on-site commissioning, 12-month warranty on parts, remote technical support via phone/video, and a spare parts stockholding for critical components (bearings, impellers, grinding rollers).
6. Q: Can this system handle other minerals besides gypsum?
   A: Absolutely. The MTW mill is designed for over 100 materials including limestone, calcite, barite, dolomite, marble, and phosphate rock. The same line can be recalibrated (adjusting feeder speed, classifier rotor speed, and grinding pressure) to process different ore types with Mohs hardness up to 7.

Shanghai Zenith Machinery Co., Ltd. remains committed to delivering customized industrial milling solutions for global customers. For more information on MTW mills, LM vertical mills, or ultrafine grinding systems, visit www.zenithcrusher.com.