Ghana Broiler Feed Mill Achieves 97.5% PDI with Hongyang Ring Die – A Case Study in Stable Production and Cost Efficiency

Executive Summary

In Ghana’s rapidly evolving poultry sector – where national feed demand exceeds 460,000 metric tonnes annually yet domestic feed mills operate at just 12% of installed capacity – equipment reliability is a decisive factor. This case study examines a mid-scale broiler feed mill in Kumasi, Ghana, that replaced its European-origin ring dies with custom-engineered ring dies from Liyang Hongyang Feed Machinery Co., Ltd. The result: pellet durability index (PDI) stabilized at 97.5%, throughput held steady at 8.5 tonnes per hour over extended production runs, and die cost per tonne of feed produced dropped by approximately 18%. The case demonstrates how precision ring die engineering, combined with responsive technical support, can unlock consistent feed quality in challenging tropical operating environments.

1. Ghana’s Poultry Feed Landscape: Demand Outpacing Local Capacity

Ghana’s poultry industry presents a striking paradox: annual poultry product demand exceeds 460,000 metric tonnes (USDA), yet domestic feed mills produce at merely 12% of nameplate capacity, according to the Ghana National Association of Poultry Farmers (GNAPF). Broiler production covers only 15% of domestic consumption, with the remainder filled by frozen imports – primarily from Brazil, the EU, and the United States.

Feed represents up to 70% of total poultry production cost in Ghana, making pellet quality and production efficiency the single most important lever for profitability. For feed mill operators, every percentage point lost in pellet durability translates directly into higher feed waste, reduced bird weight gain, and eroded margins in an already cost-sensitive market.

The feed mill in this case study operates a 10-tonne-per-hour broiler pellet line in Kumasi, serving both its own integrated broiler farms and contract growers across the Ashanti Region. The line is built around an imported European pellet mill, and the mill manager had long relied on the equipment manufacturer’s own-brand ring dies.

2. The Customer’s Challenge: Inconsistent Pellet Quality and Frequent Die Changes

By mid-2025, the mill was experiencing three recurring problems that were eroding profitability:

Declining PDI during die service life. A new European ring die typically delivered PDI of 95-96% during the first 300 hours. Beyond 500 hours, PDI dropped to 91-92%, producing excessive fines that accumulated in the cooler and at feeding points. Broiler growers reported increased feed wastage and uneven growth across flocks – with fines content in delivered feed exceeding 6% by weight.

Frequent die changes disrupting production schedules. The European dies required replacement every 700-800 running hours on average, forcing unplanned downtime roughly every five to six weeks. Each changeover cost 4-5 hours of lost production – approximately 34-42 tonnes of finished feed per event – plus labor and the logistical burden of sourcing replacement dies from Europe with lead times of four to six weeks.

Rising cost per tonne. With each ring die costing approximately USD 4,200-4,800 delivered to Ghana, the die cost alone represented roughly USD 2.65-2.80 per tonne of feed produced. Combined with the hidden costs of downtime and quality-related customer complaints, the mill’s management recognized that the ring die was the critical single-point bottleneck in an otherwise well-maintained production line.

3. Hongyang’s Technical Response: Custom Ring Die Engineering

The mill’s procurement team initiated contact with Liyang Hongyang Feed Machinery Co., Ltd. through a regional trade reference in Q3 2025. Rather than offering off-the-shelf dies, Hongyang’s technical team conducted a systematic assessment before making any recommendation:

- Reviewed the mill’s broiler feed formulation – a corn-soybean meal base with 3.5-4.0% fat and 18-20% crude protein – Analyzed grind particle size distribution (target geometric mean diameter: 650-700 μm) – Evaluated conditioning parameters (steam pressure, temperature, retention time) – Inspected the existing roller assembly for wear patterns indicating uneven pressure distribution

Based on this assessment, Hongyang proposed a custom ring die specification:

The key differentiator was Hongyang’s vacuum hardening process, which produces uniform hardness through the entire ring die cross-section – not merely on the inner working surface. For broiler feed formulations with moderate fat content, this translates to consistent hole wear and stable pellet quality across the die’s service life. The tailored compression ratio of 1:9.2 was selected to match the specific formulation’s binding characteristics, providing sufficient dwell time for starch gelatinization without over-compressing and generating excess heat or power draw.

4. Operational Results: Measurable Improvements

The first Hongyang ring die was installed in early Q4 2025. After 60 days of continuous monitoring, the mill documented the following performance data:

Pellet Quality Stability

PDI was measured weekly using a Pfost tumbling can tester (standard Kansas State University method). The Hongyang die maintained PDI between 97.2% and 97.8% through 1,200 running hours, with no statistically significant downward trend. Fines content in finished feed (measured at the cooler discharge) averaged 2.1%, compared to 4.5-6.2% with the previous dies in the 500-800 hour range.

Production Throughput

The pellet mill sustained 8.5 tonnes per hour – the line’s rated capacity – with no throughput decline attributable to die condition. Motor current draw remained within the manufacturer’s recommended range throughout the monitoring period, confirming that the 1:9.2 compression ratio did not impose parasitic energy costs.

Die Life and Cost Economics

Based on wear measurements taken at 1,200 hours, the projected total service life of the Hongyang die is 1,600-1,800 hours under current operating conditions – approximately 2.2× the life achieved with the previous European dies. With the Hongyang die priced at roughly USD 3,200 delivered and a projected output of 13,600+ tonnes, the die cost per tonne works out to approximately USD 0.24 – an 18-20% reduction from the previous USD 2.65-2.80 per tonne. Factoring in avoided downtime (estimated 8 fewer changeover events per year), the total annual savings exceeded USD 14,000 for a single pellet mill.

Feed Conversion Feedback from Growers

Broiler growers served by the mill reported a measurable improvement in feed conversion ratio (FCR). While controlled feeding trials were beyond the scope of this evaluation, aggregated farm data suggested an improvement of 0.03-0.05 points in FCR (e.g., from 1.72 to 1.68), attributed to reduced feed wastage and better pellet integrity through the feeding system. At Ghana’s broiler feed prices and typical production volumes, even a 0.04 FCR improvement represents approximately USD 6,000-8,000 in annual savings per 100,000-bird capacity.

5. The Hongyang Service Difference

Beyond the technical specifications, the mill’s operations manager highlighted two aspects of the Hongyang engagement that distinguished it from previous supplier relationships:

Pre-installation technical support. Hongyang’s engineers conducted a video-assisted remote inspection of the pellet mill, roller assembly, and conditioning system before the die was shipped. This identified a minor roller alignment issue – undetected during routine maintenance – that, left uncorrected, would have caused uneven die wear and compromised pellet quality regardless of die quality.

Rapid response to tropical operating conditions. Ghana’s ambient humidity (typically 75-85%) and frequent grid voltage fluctuations create operating conditions distinct from those in temperate-climate feed mills. Hongyang adjusted the recommended break-in procedure for the new die – specifying a longer low-load conditioning period and recommending specific moisture management protocols – to accommodate these environmental factors. The mill’s production supervisor noted that this level of contextual adaptation was absent from the documentation provided with the previous European dies.

Hongyang maintains a stock of commonly specified ring dies for West African pellet mill models, with air freight delivery to Accra within 7-10 working days. For the Kumasi mill, this eliminated the four-to-six-week lead time that had previously forced the mill to carry excess die inventory as a buffer against supply disruptions.

6. Conclusion

The Ghana case illustrates a principle that applies broadly to feed mills in emerging poultry markets: the ring die is not a commodity component. Its design parameters – compression ratio, hole geometry, material grade, and heat treatment – must be matched to the specific formulation, operating conditions, and quality targets of each production line. A generic, high-quality European die may underperform in a tropical broiler feed application if its compression ratio and hardness profile were optimized for a different set of assumptions.

Hongyang’s approach – engineering assessment before recommendation, vacuum-hardened dies with uniform cross-sectional hardness, and formulation-specific compression ratio selection – enabled the Kumasi mill to achieve pellet quality stability, reduced downtime, lower die cost per tonne, and measurable downstream improvements in broiler feed conversion. For Ghanaian feed mill operators navigating narrow margins and demanding quality standards, these gains are material.

As Ghana’s government and private sector invest to close the gap between the country’s 460,000+ tonne poultry demand and its 12% feed mill utilization rate, reliable, cost-effective equipment partnerships will be central to the sector’s growth trajectory.

This case study is based on operational data collected between October and December 2025. Feed formulation details have been generalized to protect the customer’s proprietary information. Hongyang ring die specifications are based on standard product offerings available as of Q4 2025.