This project was designed to mitigate aggregate overstock risk and increase manufactured sand production using a dry aggregate crushing solution. It was located in Damos Town, Luliang County, Qujing City, Yunnan Province, and served Qujing Highway Resources Development Co., Ltd. Luliang Company. The customer had five 5,000-ton silos on site, storing different aggregate sizes: 0-5mm (two silos), 5-10mm, 10-20mm, and 20-31.5mm. The risk of overstock was extremely severe.
Aggregate overstock occurs when the material volume in an aggregate silo exceeds rated capacity and can no longer be stored. This condition would not only force production lines to shut down and interrupt production processes, but also tie up significant working capital in stagnant inventory. As a result, production continuity and cash flow efficiency were severely impacted, restricting normal operations and long-term development.
The customer wanted to convert slow-moving aggregate below 35mm (primarily 5-31.5mm) into more marketable manufactured sand through a dry aggregate crushing process using a reliable crusher. The goal was to unlock the value of stranded inventory.
The customer required the ability to start and stop the production line flexibly and adjust throughput based on real-time aggregate sales. This would achieve dynamic inventory balance and maximize overall profit.
At the same time, the customer required the solution to have controllable investment, a small footprint, and no impact on future aggregate crushing plant construction. The solution also needed to offer transition capability and compatibility. The customer raised clear requirements regarding equipment stability, adjustment flexibility, environmental compliance, and solution feasibility. After long-term and repeated evaluation and comparison, the customer ultimately chose to partner with MP Mining Equipment Corp., Ltd.
MP Mining Equipment Corp., Ltd. was an integrated manufacturer specializing in R&D, design, production, sales, and service of crushing equipment, aggregate processing, dry aggregate crushing systems, and complete sand and gravel production lines.
MP Mining Equipment's main products included impact crushers, vibrating screens, belt conveyors, and a full range of other equipment. The company offered hundreds of product models exported to more than 20 countries overseas.
MP Mining Equipment had a mature process design team and extensive project execution experience. For applications such as aggregate overstock resolution, slow-moving inventory conversion, capacity adjustment, and existing line retrofitting, MP Mining Equipment offered both standardized and customized solutions.
With professional engineering, reliable equipment including crushers and screens, and full-process service, MP Mining Equipment Corp., Ltd. provided efficient, environmentally friendly, and low-cost complete sand and gravel solutions for mining, construction materials, and highway resource companies. MP Mining Equipment was a trusted supplier of dry aggregate crushing equipment and aggregate overstock solutions in the industry.
Based on the customer's site conditions, material characteristics, and actual production needs, MP Mining Equipment developed a tailor-made dry aggregate crushing solution for aggregate overstock risk mitigation and manufactured sand production increase.
The solution focused on resolving overstock and consuming excess aggregate as its core objectives. It adopted a ground-mounted belt conveyor and equipment layout, eliminating the need for a high-rise structure. The design made full use of the existing silos and finished product storage.
The system used a dry process with a closed-circuit design, equipped with two 1613 impact crushers with moderate capacity. The crusher system could be flexibly switched between single-machine and dual-machine operation, precisely matching inventory adjustment requirements.
The solution also took into account the characteristics of limestone material. Limestone had medium hardness (Mohs hardness 3-4) and was an easy-to-crush material. The impact crusher offered high crushing efficiency and excellent sand particle shape, with mostly cubical particles and few flat and elongated particles.
As a result, the solution ensured superior sand particle shape, high production efficiency, and stable operation. It did not affect future aggregate crushing plant construction and fully aligned with the customer's current production needs and long-term development plans.
This solution offered six key advantages:
Real-time adjustment capability. The crusher system could adjust operating status based on inventory levels, precisely controlling aggregate consumption speed.
Dry and environmentally friendly process. The completely dry process generated no wastewater or sludge, providing outstanding environmental performance suitable for water-scarce regions or areas with stringent environmental requirements.
Closed-circuit production. This design ensured complete crushing with no waste and stable product quality.
Excellent particle shape. The impact crusher's crushing characteristics for limestone produced cubical sand particles with low flat and elongated content and uniform gradation.
Controllable investment. The ground-mounted layout eliminated the need for a high-rise structure, making full use of existing facilities with lower investment.
Future compatibility. The system, including the crusher and screen, could be relocated or kept as a backup without affecting the customer's future aggregate crushing plant construction.
A switchable dry aggregate crushing line was added to the existing aggregate storage and conveying system. When any aggregate size (5-35mm) faced overstock risk, that material was diverted from the silo into the aggregate crushing system for crushing and screening. The system ultimately produced ≤5mm manufactured sand that was sent to the finished product silo for sale.
The detailed process flow consisted of six steps:
(1) Material source. The raw material came from the customer's silos: 5-35mm aggregate. This could be a mix or single size of 20-31.5mm, 10-20mm, 5-10mm, and some 0-5mm.
(2) Feeding and conveying. Material was transferred from the silo via the B0 belt conveyor (800mm wide, 128m long) to the buffer hopper above the impact crusher. The buffer hopper ensured uniform and stable feeding into the impact crusher. No standalone feeder was used, as the buffer hopper provided adequate material flow control.
(3) Crushing. Material entered two 1613 impact crushers for crushing. This was a dry process with no water addition.
(4) Screening and classification. After crushing, material was conveyed by the B1 belt conveyor (1000mm wide) to the SLG3673 vibrating screen. The screen accurately classified material at 5mm.
(5) Material recirculation and finished product separation. Oversize material (>5mm) was returned via the B2 belt conveyor (800mm wide) to the buffer hopper above the impact crusher, forming a closed circuit for further crushing. Undersize material (≤5mm) was finished manufactured sand, conveyed via the B3 belt conveyor (800mm wide) and B4 belt conveyor (800mm wide) to the customer's finished product warehouse for storage.
(6) Finished product destination. The 0-5mm manufactured sand entered the finished product warehouse for sale. This relieved sales pressure on the customer's existing 0-5mm aggregate silo or supplemented its inventory.
The customer ultimately purchased five categories of equipment: impact crusher, linear vibrating screen, belt conveyors, non-standard steel structures, and a fully automatic electrical control system.
The detailed equipment list was as follows:
| Equipment Name | Model / Specification | Quantity | Function |
|---|---|---|---|
| Feed belt conveyor | B0, 800mm wide x 128m long | 1 unit | Conveyed aggregate from the silo to the impact crusher buffer hopper |
| Impact crusher | 1613 | 2 units | Performed fine crushing and shaping of aggregate to produce manufactured sand |
| Vibrating screen | SLG3673 | 1 unit | Separated crushed material at 5mm |
| Return belt conveyor | B2, 800mm wide | 1 unit | Returned >5mm material to the impact crusher for re-crushing |
| Finished product belt conveyor | B3/B4, 800mm wide | 2 units | Conveyed ≤5mm manufactured sand to the finished product warehouse |
MP Mining Equipment's solution design, equipment configuration, and service scope received full recognition from the customer. Both parties reached agreement on project details and officially signed the project contract in December 2025.
From solution discussion and site inspection to technical confirmation, MP Mining Equipment Corp., Ltd. remained focused on the customer's needs. MP Mining Equipment Corp., Ltd. earned the customer's trust through a professional dry aggregate crushing solution and a practical, collaborative approach. The contract signing was successfully completed, laying a solid foundation for efficient project execution.
After contract signing, MP Mining Equipment Corp., Ltd. immediately began equipment manufacturing and factory testing. Quality was strictly controlled according to production standards. All equipment was produced on schedule and shipped to the project site on time.
Upon equipment arrival, MP Mining Equipment Corp., Ltd. dispatched professional engineers to the site for full-time guidance on installation and commissioning. All work strictly followed the agreed timeline.
The project completed all installation and commissioning work on April 10, 2026, and officially entered production operation. MP Mining Equipment Corp., Ltd. fully delivered on all commitments with no delays or changes, demonstrating the project execution and delivery capabilities of a professional equipment manufacturer.
After implementation, this project flexibly adjusted aggregate inventory, completely resolved the overstock problem, and ensured continuous and stable production. It converted slow-moving aggregate into high-value, fast-selling manufactured sand, significantly improving the customer's profitability. The dry process generated no wastewater or sludge, providing outstanding environmental performance suitable for water-scarce regions or areas with stringent environmental requirements. The solution made full use of existing storage and conveying facilities, effectively lowering overall investment. The transitional design allowed relocation or decommissioning of the crusher and screen system without affecting future aggregate crushing plant construction, eliminating redundant investment. The comprehensive value was significant, making this a high-quality overstock solution from MP Mining Equipment Corp., Ltd. for aggregate and mining companies.
Since commissioning on April 10, 2026, the entire dry aggregate crushing line had been operating smoothly. All key indicators — feeding, crushing, screening, recirculation, and finished product conveying — met design requirements.
The line consistently processed slow-moving aggregate and produced specification-compliant manufactured sand, effectively relieving the customer's overstock pressure.
The project progressed smoothly and was expected to be fully completed by mid-April 2026, providing long-term support for inventory adjustment and production increase.
MP Mining Equipment successfully resolved the customer's long-standing challenges of aggregate overstock, inventory buildup, and imbalanced sales. This was achieved through precise solution design, stable equipment performance including the impact crusher and vibrating screen, strict contract compliance, efficient execution, and comprehensive technical service.
The project's operational results far exceeded the customer's expectations.
With professional expertise in dry aggregate crushing and aggregate overstock solutions, along with attentive service, MP Mining Equipment Corp., Ltd. earned high recognition and praise from the customer. This project also set a strong benchmark for other aggregate and mining companies facing similar challenges.
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