Zambia’s animal feed industry has been growing steadily over the past decade, driven by rapid population growth, urbanization, and the increased demand for livestock products. To meet the nutritional requirements of poultry, cattle, and swine, animal feed producers have increasingly turned to mineral additives like limestone, which is a rich natural source of calcium carbonate. The inclusion of finely ground limestone in animal feed not only improves bone strength and eggshell quality but also enhances metabolism and overall dietary balance. In this context, the selection of an appropriate limestone grinding mill capable of producing 5–10 tons per hour (TPH) of fine powder is critical for sustainable feed production in Zambia.
Shanghai Zenith Machinery Co., Ltd., as one of China’s leading manufacturers of ore and industrial grinding equipment, has been providing efficient and environmentally friendly grinding solutions for decades. Specifically, their advanced mills such as the MTW Trapezium Grinding Mill and the LM Vertical Grinding Mill are ideally suited for processing limestone into high-quality powders that can be used as feed additives. This article explores the technical and economic aspects of using these mills for a 5–10 TPH limestone grinding project in Zambia.
Limestone is primarily composed of calcium carbonate (CaCO₃), an essential mineral for bone formation, eggshell hardness, and metabolic function in livestock. Typically, feed-grade limestone requires a particle size finer than 150 microns to ensure uniform mixing and optimal absorption by animals. Therefore, achieving a consistent and fine particle size distribution is crucial, which in turn places specific demands on the grinding mill technology deployed.
In Zambia, many feed producers face challenges in sourcing high-quality, locally milled limestone. Poor grinding efficiency and inconsistent fineness often lead to quality issues in feed formulation. Hence, choosing an advanced and energy-efficient grinding mill can significantly enhance the productivity and profitability of feed producers, while ensuring consistent quality output.
For operations targeting 5–10 TPH output, two of Shanghai Zenith’s grinding systems are particularly suitable: the MTW Trapezium Grinding Mill and the LM Vertical Grinding Mill. Both are advanced grinding solutions designed for high throughput, excellent powder control, and energy efficiency.
The MTW Trapezium Grinding Mill represents a new generation of grinding equipment designed with cutting-edge technology. It combines European grinding technology with advanced mechanical design, ensuring stable performance and high fineness. The machine features a unique bevel gear-driven transmission, efficient powder separator, and environmentally friendly pulse dust collector. For limestone processing, the MTW mill delivers uniform powder size within 45–38 microns, perfectly aligned with feed additive specifications.
| Model | Max. Feed Size (mm) | Final Size (mm) | Capacity (t/h) | Main Motor (kW) | Fan Motor (kW) |
|---|---|---|---|---|---|
| MTW110Z | <30 | 1.6-0.045 | 3-10 | 55 | 55 |
| MTW138Z | <35 | 1.6-0.045 | 6-17 | 90 | 110 |
For a production line targeting 5–10 TPH, the MTW110Z model is the ideal choice. It can efficiently grind limestone into uniform fine powders suitable for feed-grade calcium additives. In addition, its innovative design minimizes vibration and noise, making it suitable for both urban and rural industrial installations in Zambia.
Another excellent option for limestone grinding is the LM Vertical Grinding Mill. This mill is distinguished by its integrated functions of crushing, grinding, drying, and powder selection—all within one machine. This level of integration significantly reduces system energy consumption and plant footprint. The LM mill is particularly effective when dealing with materials of moderate moisture content, making it suitable for Zambian limestone deposits.
The LM Vertical Mill also features automatic control systems, which allow operators to adjust product fineness between 40–170 microns easily. Moreover, unlike traditional ball mills or Raymond mills, the LM design allows simultaneous drying and grinding, thereby reducing production time and cost—an important consideration for feed manufacturers aiming to maintain consistent inventory levels.
| Model | Plate Diameter (mm) | Capacity (t/h) | Fineness (μm) | Max Feed Size (mm) | Main Motor (kW) |
|---|---|---|---|---|---|
| LM130K | 1300 | 10-28 | 170-40 | <38 | 200 |
| LM190K | 1900 | 23-68 | 170-40 | <45 | 500 |
For a 5–10 TPH limestone project, the LM130K model offers the right capacity range with high energy efficiency. The vertical mill’s ability to integrate drying reduces the need for pre-processing limestone, thereby saving equipment investment and operational costs.
In a typical Zambian limestone grinding plant designed for feed additive production, the raw limestone (with moisture content below 6%) is fed into a primary crusher, which reduces the material size to below 30 mm. The crushed material is then conveyed to the grinding mill, such as the MTW110Z or LM130K. A classifier and pulse dust collector system are also integrated into the process to ensure clean operations and precise product fineness control.
The final ground powder is collected and either stored in silos or directly packed for transport to animal feed producers. With a total system power consumption in the range of 80–120 kWh per ton of output, these configured systems ensure both cost efficiency and environmental compliance.
By investing in modern grinding systems such as Zenith’s MTW or LM vertical mills, Zambian feed producers can localize their limestone additive processing, reducing reliance on imported powders. This not only enhances supply chain reliability but also lowers operational costs over time. Additionally, the efficient utilization of locally sourced limestone supports Zambia’s mining sector while fostering sustainable agricultural development.
The 5–10 TPH limestone grinding mill solutions from Shanghai Zenith Machinery Co., Ltd. represent a perfect fit for Zambia’s growing animal feed industry. With advanced technology, low operational costs, and robust environmental compliance, models such as the MTW110Z Trapezium Mill and LM130K Vertical Mill provide a comprehensive grinding solution to meet national demand. As Zambia continues to modernize its agricultural and livestock sectors, investing in efficient mineral processing infrastructure will play a pivotal role in ensuring both food security and industrial growth.
For companies seeking reliable grinding systems for animal feed additives or other industrial mineral projects, Shanghai Zenith’s technical support and global service network offer strong assurance of quality and performance durability.
