7-8T/H Biomass Pellet Production Line in Chile

How This Job Landed on My Desk

I got the call from our sales team in September 2024. A group of sawmill operators in the Biobío region about 40 of them, mostly family-owned had pooled resources to build a centralized pellet plant. For years, they'd been sitting on mountains of sawdust and wood chips, paying to have it hauled away or just burning it in tepee burners which are increasingly restricted under Chile's new decontamination plans. They wanted to turn that waste stream into a revenue stream.

The timing made sense. Chile's pellet market is in what the locals call a consolidation phase production hit about 220,000 tons in 2024, and new plants are coming online every year, mostly from the central zone down to the south. Biobío alone accounts for over 70% of the country's pellet production. The forestry industry here is massive, and where you find sawmills, you find residue.

But here's the thing: most of the existing plants are small 1-2 t/h lines cobbled together with second-hand equipment. The cooperative wanted something bigger. They wanted a 7-8 t/h biomass pellet production line in Chile that could actually compete on volume and quality with the imports from Canada and Europe. That's where we came in.

Site Visit: First Impressions

I flew into Santiago, then caught a connection to Carriel Sur airport in Concepción. From there, it's about an hour's drive southeast to Los Ángeles. The site was an old sawmill yard about 2,000 square meters total situated right off the Ruta 5 south highway. Good truck access, which matters when you're moving 20,000 tons of finished product per year.

The ground was packed clay, relatively flat. The client had already poured the slab for the production building a 1,260 m² steel structure, 10 meters at the eaves. Fully enclosed, which is critical here. You get rain, and wet sawdust is a nightmare. The office and dormitory building was going up next to it two stories, with a small kitchen on the ground floor and bunks upstairs for the night shift operators. The crew here runs 330 days a year, two shifts. Twelve people total ten operators and two supervisors.

What struck me was how organized the raw material yard was. They had three separate piles: fresh sawdust from the mills (50%+ moisture), kiln-dry shavings from a furniture manufacturer (12-15% moisture), and chipped logging residues. The plan was to blend these to control the feed moisture going into the dryer. Smart.

Table: Facility Layout Summary

The Raw Material Reality

You can't design a biomass pellet production line in Chile without understanding the feedstock. Pinus radiata is the dominant species here fast-growing, relatively low density, but consistent. The client's raw material breakdown looked like this:

Table: Raw Material Consumption (Annual)

The green sawdust comes in at 50-55% moisture. The target for pelletizing is 12-15%. That means we have to remove about 40 percentage points of moisture. That's a lot of water, and it takes energy. The client had budgeted for a biomass dryer, but we had to size it carefully.

Equipment Configuration: What We Installed

The client originally sent us a list of equipment they'd seen at a trade show some Chinese machines, some Brazilian. We sat down with them in Santiago and walked through the process step by step. In the end, they went with our full recommendation. Here's what we put in:

Table: Major Equipment List – 7-8 t/h Biomass Pellet Line

We also supplied the electrical control panel with a PLC, but the client sourced the transformers and cabling locally saved them on shipping.

The biomass pellet mill is the workhorse. 250 kW, ring die, capacity matched to the hammer mill. We spent a lot of time talking about die specs. For pine, we recommended a compression ratio of around 1:5 for the 6mm die. The client wanted the flexibility to run both 6mm (residential stoves) and 8mm (industrial boilers), so we supplied two dies.

Process Flow: What Happens Inside

Standing on the floor, watching the line run for the first time that's the moment. Here's how it works:

1. Infeed

Front-end loader dumps raw material into the receiving pit. Screw feeder meters it onto the conveyor. The operator controls the speed from the panel, matching feed rate to the crusher load.

2. Coarse Crushing

The XPJ1400 eats the big chips and chunks. It's a low-speed, high-torque machine handles the occasional nail or rock without catastrophic failure though we told them to be careful with metal. Outfeed conveyor has a magnetic pulley to pull out ferrous scrap.

3. Fine Grinding

The biomass hammer mill runs at 160 kW. This is where the magic happens. The hammers swing, the screens size the material. We started with 6mm screens for the first run, but they'll switch to 8mm for industrial pellets. The mill is loud we built an insulated enclosure around it per the environmental permit.

4. Pelletizing

Ground material goes into the bin above the MZLH. The biomass pellet mill runs continuously. We conditioned the material with steam the client had a small electric boiler for startup, but they're planning to add a biomass boiler later to use their own fines as fuel. The rolls press the material through the die, knives cut the strands, and hot pellets (80-90°C) pour out like golden rain.

5. Cooling & Screening

Pellets go up the drag conveyor to the counterflow cooler. Ambient air pulls upward through the moving pellet bed. In 15-20 minutes, they're down to within 5°C of ambient. Then they hit the vibrating screener. Fines drop out (recycled back to the mill), and on-spec pellets go to the bagging bin.

6. Bagging & Storage

The bagging machine is semi-automatic operator hangs the bag, the scale fills to 30 or 50 kg, and it drops to a roller conveyor for stitching. Bagged pellets get forklifted to the finished product storage area (320 m²). They stack three pallets high.

Environmental Controls: Keeping It Legal

Chile's environmental rules are tightening. The new Solid Biofuels Law is being drafted, and emission standards for heaters and boilers are coming. For the plant itself, the main concerns are dust and odor though pine doesn't smell bad.

Dust Collection

• Coarse crusher outlet
• Fine crusher outlet
• Pellet mill inlet and outlet
• Cooler outlet
• Screener

Captured dust goes back into the process via a screw conveyor under the baghouse. It's not wasted. The exhaust goes up a 15m stack (DA001). During performance testing, we measured outlet particulates well below the Chilean standard which is similar to EPA levels.

Utility Consumption: The Operating Cost Basics

Table: Utility Consumption (Annual Estimates)

The Economics: What It Cost

Table: Project Cost Breakdown

Lessons Learned

1. Dryer? What Dryer?
2. Power Quality
3. Pine Dust
4. Operator Training

Market Outlook: Why This Plant Makes Sense

Chile imports very few pellets the local industry supplies nearly all domestic demand. And demand is growing. Heating with pellets is cheaper than electricity or propane in most of the country, and with the new emission standards coming for wood stoves, people are switching to automated pellet heaters.

The Biobío region is the heart of the industry. Having a 7-8 t/h biomass pellet production line in Chile here means you're close to both the raw material and the customers.

• Residential heating in the central-south zones (Maule to Los Lagos)
• Industrial boilers in the Biobío industrial parks
• Potential export to Argentina (though the border logistics are tricky)

The cooperative model makes sense, too. Instead of 40 sawmills each struggling with their own waste, they have one central plant turning that waste into a high-value product. The payback period on this line, based on current pellet prices ($250-300/ton wholesale), is around 3-4 years.

Final Thoughts

This was a good biomass pellet project. The client knew what they wanted, the site was well-prepared, and the local contractors were professional. The biomass pelletizer fired up on the first try and ran smoothly through the week-long performance test. We hit 7.5 tons/hour on 6mm pine pellets, with less than 2% fines.

If you're sitting on forestry or ag waste in Chile and thinking about a pellet line, get in touch. We'll help you figure out the numbers the real numbers, not the brochure numbers. And if you're anywhere near Los Ángeles, stop by this plant. They'll show you around. Just don't mention the dryer.