0.8-1.0 T/H Grass Hay Cat Litter Pelletizing Machine in Australia

The sawmill owner purchased two standalone grass hay cat litter pellet machines to complement their existing wood drying and grinding infrastructure, creating a parallel production stream during off-peak timber seasons.

Their primary motivation was not merely waste reduction but rather tapping into the $500 million Australian pet care consumables market, where domestically produced natural cat litter commands premium pricing over imported alternatives.

The customer chose our non-conditioner MZLH series pelletizers because their raw materials—dry sawdust mixed with harvested grass hay—required no steam conditioning, preserving the natural absorbency and odor-control properties essential for quality pet litter.

This single-machine purchase strategy allowed them to test the market without committing to a fully automated production line, representing a calculated, low-risk entry into pet product manufacturing.

Customer Background and Raw Material Situation

Based in the Latrobe Valley, a region known for its rich forestry resources, this sawmill processes roughly 15,000 cubic meters of timber annually, generating approximately 2,500 tons of wood waste. The owner, an entrepreneur who previously sold their sawdust to landscape suppliers at marginal profits, saw an opportunity to vertically integrate.

With support from local agricultural extension services promoting waste-to-value initiatives, they began collecting grass hay from their managed plantation firebreaks—areas that require annual mowing for bushfire prevention.

Previously, this grass hay was left to decompose or was burned, releasing carbon into the atmosphere. Now, it serves as a strategic additive to their wood-based cat litter formula.

The raw material mix is approximately 70% dry radiata pine sawdust (screened to <3mm particle size) and 30% dried grass hay (chopped to 5-10mm lengths). This combination yields a pellet with superior clumping characteristics compared to pure wood pellets, while the grass component provides a natural green tint that signals "herbal" and "natural" to eco-conscious Australian consumers.

The grass hay, harvested in late spring when its fiber content peaks, undergoes sun-drying on the mill's asphalt yard for 7-10 days until moisture content drops below 12%. No additional binders or starches are added, as the natural lignins in both wood and grass activate under the heat and pressure of the pelletizing process.

The customer targets a final pellet diameter of 6mm, the sweet spot for Australian cat litter trays where larger pellets (8-12mm) tend to roll out and smaller pellets (2-4mm) track excessively.

Equipment Selection and Technical Specifications

After analyzing the customer's throughput requirements and raw material characteristics, RICHI engineers recommended two units of the MZLH350 grass hay cat litter pelletizing machine, a model specifically designed for dry, fibrous inputs without a conditioner.

The customer processes material in two shifts, targeting 0.8 tons per hour per machine, comfortably within the model's 0.3-0.5 T/H nominal range for grass and wood blends.

Each unit is powered by a 37 kW main motor (Siemens-branded, IP55 rated for dusty environments), equipped with a 2.2 kW bridging prevention feeder to handle fluffy grass hay, and a 0.75 kW forced feeder ensuring consistent die fill. The ring die inner diameter measures 350mm, ideal for maintaining pellet quality without excessive energy consumption.

Pellet diameter is set at 6mm via a custom-spec die with 45mm effective working length, optimized for the abrasive nature of grass fiber. The customer elected not to purchase the optional post-pelletization cooler, as their production volume allows pellets to air-dry on mesh racks overnight before bagging.

Key specifications of their installation include:

• Model: MZLH350 (Two units, deployed in parallel)
• Main Motor: 37 kW (x2) – Total connected load 74 kW
• Feeder System: Bridging prevention screw with variable frequency drive
• Raw Material Throughput: Combined 0.8-1.0 T/H (depending on grass hay proportion)
• Pellet Dimensions: 6mm diameter x 15-30mm length (adjustable via cutter knives)
• Die Specifications: Ring die, 350mm ID, 45mm effective thickness, compression ratio 1:5.5

The customer's existing infrastructure—a 75 kW hammer mill (for sawdust) and a 30 kW tub grinder (for grass hay)—feeds directly into the pelletizers' surge bins via screw conveyors retrofitted with magnetic separators to remove tramp metal. This single-machine addition cost approximately 35% of a complete turnkey line, allowing the sawmill to maintain liquidity while proving market demand.

Why the Customer Chose This Single-Machine Solution

The sawmill owner explicitly avoided purchasing a full production line for three strategic reasons. First, the Australian cat litter market, while growing at 8% annually, remains fragmented, with no single brand holding more than 15% share—too risky for a $2 million line investment. Second, their raw material supply fluctuates seasonally (more grass hay in summer, more sawdust in winter), making a fixed-capacity line inefficient.

Third, the owner wanted to preserve the option to pivot back to fuel pellet production if cat litter margins compressed.

The grass hay cat litter pelletizing machine in Australia offered by RICHI provides this flexibility: with a simple die change (from 6mm cat litter to 8mm fuel pellet) and removal of the grass hay feeder, the exact same MZLH350 produces wood fuel pellets for local heating markets. This "plug-and-play" versatility was the decisive factor.

The customer also appreciated that our single machines include the same heavy-duty gearbox and wear-resistant ring die materials as our full-line systems—no corners cut.

They purchased two identical units to test different formulations in parallel (e.g., 80/20 wood/grass vs. 60/40), accelerating their R&D phase. One unit runs during daytime hours when staff are present for adjustments; the second operates overnight via a simple timer, filling super sacks by morning.

Expanding Beyond Cat Litter: The Platform Versatility Advantage

One of the most compelling aspects of the MZLH350 platform is its ability to produce multiple revenue-generating products from identical raw materials.

While the primary application is grass hay and wood cat litter pellets, the same machine configuration (with minor adjustments) can process other valuable products for Australian markets.

The table below outlines the platform's versatility:

For the Australian customer, this multi-functionality means their grass hay cat litter pelletizing machine in Australia operates at near-full utilization year-round. From March to May (autumn), they shift to fuel pellet production for the winter heating season. From September to November (spring), they produce horse bedding pellets for racing stables preparing for the spring carnival.

The cat litter production runs primarily in winter and summer, aligning with cat owners' indoor pet management during extreme weather. This business model—what the owner calls "four seasons, four products"—ensures the pelletizers pay for themselves within 18 months rather than the standard 36-month horizon for single-purpose equipment.

Shipping and Logistics

Both MZLH350 units were shipped from RICHI's Qingdao port facility in a single 40-foot high-cube container, consolidated with spare ring dies and wear parts. The sailing route via the South China Sea and Coral Sea delivered to the Port of Melbourne (Victoria's primary container terminal), with a total transit time of 22 days including a transshipment stop at Port Klang, Malaysia.

Melbourne was selected over Sydney or Brisbane due to the customer's proximity (under 150 km) and the port's superior rail connections to the Latrobe Valley industrial zone. The customer arranged their own flatbed truck transport from Melbourne's Webb Dock East terminal, saving approximately $1,200 AUD compared to door-to-door delivery.

RICHI provided detailed customs documentation, including CE conformity certificates and a declaration that the machines contained no untreated wood packaging (all ISPM-15 compliant), ensuring smooth clearance through the Australian Department of Agriculture, Fisheries and Forestry.

Customer Feedback and Operational Experience

Six months post-installation, the sawmill owner reported that the grass hay cat litter pelletizing machine in Australia had "exceeded every operational metric we projected." The most frequent feedback concerned the bridging prevention feeder's handling of fluffy grass hay—a notorious challenge in the pelletizing industry.

"Other manufacturers told us we'd need to pelletize grass separately and mix post-process," the owner stated in a follow-up call. "But RICHI's forced feeder design, with its dual augers and variable speed, stuffs even our chunkier grass hay into the die uniformly. We haven't had a single die stall in over 800 production hours."

The customer also praised the quick-release die cover, which allows die changes in under 20 minutes without specialized tools—critical when switching between cat litter and fuel pellet production.

On the maintenance side, the owner noted that the ring die's wear life on the abrasive grass mixture (approx. 1,200 tons) matched RICHI's pre-purchase projections, and the spare parts order (spare rollers, die, and shear bolts) arrived in Melbourne within 10 days of their first request.

The only negative feedback? The machine's noise level at full load (95 dB) required ear protection for operators, though this is standard for non-conditioner pellet mills. RICHI has since provided a retrofit acoustic enclosure design to the customer at no charge.

RICHI's Global Expertise in Cat Litter Pelletizing Systems

With over 28 years of manufacturing experience, RICHI Machinery has exported cat litter pelletizing solutions to more than 80 countries worldwide, covering every commercially viable raw material on the market.

Whether a customer's formula requires tofu dregs, bentonite clay, attapulgite, cassava starch, zeolite, diatomaceous earth, waste newspaper, old corrugated cartons, plantation pine, agricultural straw, corn stalks, or the grass hay featured in this Australian case study—our engineering team has validated the die specifications and compression ratios needed for success.

RICHI's pelletizing platforms accommodate pellets from 2mm to 12mm in diameter, supporting not only cat litter but also small animal bedding (hamsters, rabbits, guinea pigs), oil absorbent granules for workshops, and even biodegradable planting pellets for hydroponic growers.

For customers with unconventional or multi-material recipes (e.g., 50% paper + 30% wood + 20% dried flowers), RICHI offers a no-obligation raw material testing service at our Qingdao technical center.

Ship a 50 kg sample, and we will return production-grade pellets along with the exact machine parameters used, eliminating guesswork and ensuring your grass hay cat litter pelletizing machine in Australia—or anywhere else—performs to specification from day one.