About Us | Heyl Patterson Thermal Processing
Engineered Thermal Solutions for Today’s Most Demanding Materials
Heyl Patterson Thermal Processing (HP Process) is a global leader in high-temperature material processing equipment delivering dependable rotary calciners, rotary dryers, rotary coolers, and complete thermal systems for the world’s most challenging materials. For more than 140 years, our engineering team has helped processors improve material quality, meet tight specifications, and operate more stably and efficiently. From critical minerals to cementitious materials to battery components, every HP Process system is designed to perform reliably in continuous-duty environments where precision and uptime matter.
What We Do
We design and manufacture thermal processing systems that deliver repeatable, efficient, and industry-leading performance no matter the material. Our equipment is known around the world for:
Core Capabilities
High-Temperature Thermal Processing
- Rotary calciners for controlled, indirect heating
- Rotary dryers and rotary coolers for consistent moisture and temperature reduction
- Integrated heating and off-gas handling systems
- Precision control of residence time, temperature profiles, and atmospheric conditions
Engineering for Difficult Materials
We excel with materials that require:
- High heat (>1500°F)
- Controlled atmospheres (inert, oxidizing, reducing)
- Tight particle-size and moisture specifications
- Abrasion resistance or corrosion protection
- Specialty handling for powders, clays, carbon materials, critical minerals, or ash-based products
Each solution is engineered around your specific process requirements material behavior, feed characteristics, thermal profile, throughput, and downstream integration.
Industries We Serve
Test your product materials with our processing equipment in a state-of-the-art testing laboratory. Rotary calciners, dryers, and coolers are available for performing lab tests in a pilot-scale simulation.
HP Process supports producers, refiners, and recyclers across a wide range of sectors, including:
- Supplementary Cementitious Materials (SCMs) – clay calcination, LC3, pozzolans, fly ash
- Lithium Battery Material Synthesis & Recycling – precursor cathode materials, black mass, LFP/NMC
- Rare Earth Element (REE) Processing
- Fly Ash Beneficiation & Infrastructure Materials
- Chemicals & Catalysts
- Metals, Mining & Critical Minerals
- Biomass, Renewable Fuels & Waste Conversion
- Industrial Byproducts & Recycled Materials
- General Industrial Thermal Processing
Our rotary systems are built for facilities requiring precise thermal control and reliable 24/7 operation from high-temperature calcination to controlled cooling and drying.
Complete Process Systems
As a subsidiary of CPEG, our customers have access to additional processing and material handling equipment, including fluid bed dryers, coolers, evaporators, feeders, conveyors, industrial mixers, and air pollution and emissions control equipment such as baghouses, scrubbers, cyclones, and thermal oxidizers.
Multi-step product testing can be performed with these machines in our Innovation Center & Test Lab to simulate full production lines, before purchasing any new process equipment.
For more information about CPEG subsidiaries and product offerings, hover over and click the logos below.
Our Engineering Process
1. Material Testing & Thermal Analysis
We evaluate real material samples to determine:
- Moisture removal rates
- Heat transfer behavior
- Particle flow characteristics
- Thermal decomposition and reaction profiles
2. Custom Design & Engineering
Our engineers design process-specific equipment tailored to:
- Throughput requirements
- Temperature and atmosphere control
- Energy efficiency
- System footprint
- Integration with upstream and downstream processes
3. Fabrication & Quality Assurance
All HP Process equipment is manufactured using heavy-duty, high-temperature materials with strict QC measures to ensure long-term operational reliability.
4. Installation, Commissioning & Training
Our field service team oversees installation, startup, calibration, and operator training to ensure a smooth handoff and stable performance.
5. Full Lifecycle Support
We provide maintenance, spare parts, inspections, retrofits, and performance optimizations helping processors maintain consistent uptime across the equipment lifecycle.
Partner with Heyl Patterson for Your Next Thermal Processing Project
Choosing the right thermal processing partner can determine the long-term success of your operation. At Heyl Patterson Thermal Processing, we combine deep process expertise, proven rotary technology, and real-world material testing to deliver systems that perform exactly as promised at startup and for decades to come.
Whether you’re developing battery materials, upgrading a calcination line, recovering critical minerals, or transforming industrial byproducts into high-value products, our engineers are ready to help you find the optimal thermal solution.
Contact Heyl Patterson today to discuss your material, review your process goals, or schedule testing in our Innovation Center. Let’s build a system that turns your toughest materials into your strongest advantage.