Stable Pellet Production for Kazakhstan’s Growing Ruminant Feed Market: A Hongyang Ring Die Pellet Mill Case Study

Executive Summary

Kazakhstan’s compound feed industry is undergoing a structural transformation. In 2025, the country produced approximately 3.7 million metric tons of compound feed for farm animals—a 54% increase over 2024, according to official statistics reported by APK-Inform. The Kostanay region, one of the country’s three dominant feed-producing oblasts, doubled its output from 501,000 tons to over 1.05 million tons in the same period, driven by both domestic livestock expansion and surging export demand from China, which absorbed 99.1% of Kazakhstan’s 1.7 million tons of animal feed exports in the first eight months of 2025.

In this high-growth environment, a mid-sized feed mill in the Kostanay region—processing approximately 40,000 metric tons of ruminant compound feed annually for cattle and sheep operations—faced a production bottleneck. Its aging pellet mill was unable to sustain throughput targets without compromising pellet quality, and die replacement intervals had shortened to uneconomical levels. In mid-2025, the mill installed a Hongyang HYPM-series ring die pellet mill configured for ruminant feed. Over the subsequent eight months, the mill recorded a 31% increase in daily throughput, a measurable improvement in pellet durability index, and an extension of ring die service life by over 40%. This article documents the operational context, the technical solution, and the performance data observed.

Kazakhstan’s Ruminant Feed Industry: Context and Scale

Kazakhstan’s agricultural landscape is defined by its scale. As the world’s ninth-largest country by land area, it possesses approximately 180 million hectares of agricultural land, of which pastures account for roughly 70%. The country’s cattle herd, estimated at 8.5 million head in 2024, and its sheep population of approximately 20 million head, represent a substantial and growing demand base for compound feed.

Historically, Kazakhstan’s livestock sector relied on extensive grazing, with feed supplementation limited to winter months. Three factors have driven a marked shift in the past decade:

First, government policy. Kazakhstan’s State Program for the Development of the Agro-Industrial Complex, running through 2026, includes targeted subsidies for feedlot operations and feed mill construction, aiming to increase the share of intensively finished cattle from under 15% to over 30%.

Second, export market requirements. The overwhelming share of Kazakhstan’s compound feed exports flows to China, where feed safety and quality standards have tightened progressively. Chinese importers increasingly demand documented pellet quality metrics—pellet durability index, moisture uniformity, and absence of fines—standards difficult to meet consistently with aging pelleting equipment.

Third, climatic necessity. Northern Kazakhstan, including the Kostanay region, experiences extreme continental climate with winter temperatures routinely below minus 30 degrees Celsius. During the six-month winter feeding period, when animals are confined and dependent on stored feed, pellet quality becomes a direct determinant of livestock performance. Pellets that disintegrate during handling generate fines that cattle sort and reject, increasing feed waste when margins are already compressed by heating and housing costs.

The Mill and Its Challenge

The feed mill in question serves a cluster of beef cattle feedlots and sheep finishing operations within a 150-kilometer radius of Kostanay city. Its product portfolio consists of two formulations: a cattle finishing ration based on barley, wheat bran, sunflower meal, and mineral premix, and a sheep grower ration incorporating alfalfa meal, barley, and cottonseed meal.

The mill’s existing pelleting line—a domestically manufactured pellet mill installed in 2012—had reached the end of its economic service life. The quality control department documented the following issues during the 2024 operating year:

Ring die replacement intervals had shortened to approximately 600 operating hours, down from the manufacturer’s original specification of 1,200 hours. Die wear manifested as progressive hole enlargement, which increased the effective compression ratio of the working surface and raised the energy required per ton of pellets produced.

Pellet durability index, measured using the Holmen tester (pneumatic method), had declined from an acceptable 93–94% range to 88–90%. For the mill’s cattle feedlot customers, who received pellets in bulk and transported them in tipping trailers over unpaved roads, the higher percentage of fines translated directly into animal rejection at the feed bunk and a corresponding increase in cost per kilogram of liveweight gain.

Throughput had degraded from a rated 8 metric tons per hour to an average of 6.2 tons per hour on the cattle ration, creating a production bottleneck during the peak pre-winter ordering period from August through October, when the mill typically operated 20–22 hours per day.

Downtime attributed to die changes and associated mechanical adjustments averaged 12 hours per month, or roughly 144 production hours lost annually.

The Hongyang Pellet Mill Configuration

Following a technical evaluation that included die metallurgy analysis, compression ratio consultation, and reference-site verification, the mill selected a Hongyang HYPM-series ring die pellet mill rated at 8–12 metric tons per hour on ruminant formulations. The machine was commissioned in May 2025. Several design and manufacturing features proved material to the performance improvement:

Ring Die Metallurgy and Heat Treatment: The ring die supplied with the mill is manufactured from alloy steel forgings (grade 4Cr13 or equivalent, depending on application), with a vacuum hardening process that achieves 58–60 HRC surface hardness while maintaining core toughness to resist fracture under the cyclic loading characteristic of high-fiber ruminant rations. The die holes are gun-drilled and then honed to a surface finish of Ra 0.8 μm or better on the inner wall, reducing friction during pellet extrusion and contributing to both throughput and energy efficiency.

Compression Ratio Selection for Ruminant Feed: Based on the mill’s specific formulations—which contain approximately 18–22% crude fiber from barley hulls, sunflower meal, and alfalfa—Hongyang’s application engineers recommended a compression ratio of 1:9 to 1:10 for the cattle ration and 1:7 to 1:8 for the higher-fiber sheep ration. These ratios reflect the engineering principle that higher-fiber feedstocks require lower compression to avoid excessive die pressure, heat generation, and die surface glazing—a condition where overheated feed material forms a hardened layer that blocks die holes and forces unscheduled stoppages. Separate ring dies were supplied for each formulation, with the compression ratios laser-etched on the die body for operator reference.

Roller Assembly Design: The pellet mill’s roller shells are manufactured from the same alloy steel grade as the ring die, with a matched hardness specification that ensures even wear between the two components. Uneven wear—where rollers degrade faster than the die or vice versa—is a common cause of declining pellet quality between maintenance intervals, as the gap between roller and die surface widens and extrusion pressure becomes inconsistent. The matched-pair approach maintains consistent nip-point geometry across the full service interval.

Drive Train and Motor Efficiency: The mill employs a heavy-duty gearbox with case-hardened helical gears, direct-coupled to an IE3-class high-efficiency motor. The mill’s management calculated that the IE3 motor’s 2–3 percentage point efficiency advantage over the IE1 motor on the replaced machine would recover the incremental cost within approximately 14 months at Kazakhstan’s industrial electricity tariff of 22–25 KZT per kWh (approximately USD 0.045–0.052).

Operational Results: Eight-Month Performance Data

The following data was compiled by the mill’s production department for the period June 2025 through January 2026 (eight months), compared against the equivalent period in 2024:

Several observations merit attention:

The throughput improvement on the cattle ration exceeded the sheep ration by 6.1 percentage points, consistent with the higher fiber content of the sheep formulation limiting the pelleting rate regardless of machine capability. This is an inherent material property, not an equipment limitation.

The energy consumption reduction of approximately 15% across both formulations tracks closely with industry estimates of the efficiency gain achievable when upgrading from a decade-old pellet mill to a current-generation machine with a properly specified ring die. At the mill’s annual production volume of 40,000 tons, this translates to roughly 92,000 kWh saved annually—approximately 4.2 million KZT at prevailing industrial rates.

The extension of ring die service life from 600 to 880 hours represents a 46.7% improvement. The mill’s production manager noted that the true economic benefit lies less in die cost than in avoided downtime: each die change consumed 6–8 hours, and reducing change frequency from approximately 14 per year to 9 freed up 30–40 additional production hours annually.

Why Ring Die Quality Matters for Ruminant Feed

Ruminant feed pelleting presents distinct engineering challenges compared to poultry or aquafeed. The higher fiber content—typically 15–25% crude fiber versus 3–5% for broiler feed—means the die must withstand abrasive fibrous material and higher specific energy for extrusion.

The interaction between fiber and die surface is mechanical rather than chemical: cellulose and hemicellulose fibers do not plasticize during conditioning as starch does. They pass through die holes as intact structures, abrading hole walls and gradually enlarging the effective diameter. As diameter increases, effective compression ratio decreases, and the die’s ability to produce durable pellets diminishes. Ring die hardness—specifically uniformity of hardness through the full die thickness—is the primary determinant of service life in ruminant applications.

Hongyang’s vacuum hardening process, achieving consistent hardness through the die body rather than only at the working surface, addresses this failure mode directly. The 46.7% extension in service life observed at the Kostanay mill is consistent with what the metallurgy predicts for alloy steel dies on medium-fiber ruminant rations.

A secondary benefit is reduced variability in pellet hardness across batches. With the previous machine, pellet durability could vary by 3–4 percentage points between a freshly installed die and one approaching end of life. The new die narrowed this range to approximately 1.5 percentage points—simplifying quality assurance and reducing customer complaints.

Customer Satisfaction and Feedlot Feedback

The mill’s downstream customers—the beef feedlots and sheep finishing operations that purchase its pellets—provide an external validation of the equipment upgrade. A survey conducted by the mill’s sales team in December 2025, covering 12 of its largest feedlot accounts, returned the following aggregated feedback:

Nine of twelve feedlot managers reported a visible reduction in fines upon pellet delivery. One manager, finishing approximately 3,000 head annually, quantified the improvement: “Previously we would see 8–10 centimeters of fines at the bottom of every 25-ton delivery. Now it’s consistently under 3 centimeters.”

Seven respondents noted that pellets held their shape better during auger distribution, reducing bridging and clogging issues. Four feedlots maintaining feed conversion records reported improved feed-to-gain ratios, though the mill is cautious about attributing this solely to pellet quality given confounding variables of temperature, genetics, and bunk management.

The mill’s sheep feed customers—smaller operations finishing 500–2,000 head—reported similar observations, with emphasis on reduced trough wastage. Sheep, being more selective feeders than cattle, sort and reject fines more aggressively, making pellet integrity especially critical for this segment.

Conclusion

Kazakhstan’s compound feed sector is expanding at a pace that will continue to stress existing production infrastructure. The Kostanay-region mill’s experience with the Hongyang HYPM pellet mill illustrates a broader principle: in a high-growth market, the capital decision on pelleting equipment must account for full lifecycle economics—energy consumption, die service life, downtime cost, and downstream customer satisfaction—rather than purchase price alone.

The performance data recorded at the Kostanay mill, spanning eight months of continuous production under demanding climatic and operational conditions, provides a verifiable reference for feed manufacturers facing similar challenges in Kazakhstan and the broader Central Asian market. For Hongyang, the case reinforces the company’s capability to deliver application-specific ring die and pellet mill solutions for ruminant feed—a segment that demands particular attention to metallurgy, compression ratio engineering, and durability under abrasive operating conditions.