Industrial Rotary Roasters & Calciners Manufacturers
Mathesis Engineers Rotary Roasters & Calciners are continuous high-temperature thermal processing systems designed for calcination, roasting, thermal decomposition, and oxidation of minerals, ores, catalysts, and chemical salts.
Rotary Calciners and Roasters are tumbling cylindrical kilns that heat solid materials to elevated temperatures in controlled atmospheres. Mathesis Engineers manufactures Direct-Fired and Indirect-Fired (Ext-Heated) Rotary Calciners for process temperatures up to 1100 °C.
Featuring heavy-duty refractory linings, alloy steel retorts, rider ring trunnion supports, variable speed girth gear drives, and gas-tight seals, our calciners ensure uniform thermal treatment and maximum fuel economy.
Solid material is continuously fed into the upper end of a rotating cylindrical drum inclined at a slight slope. As the cylinder revolves, internal lifters tumble the material, causing it to travel slowly downward toward the discharge end.
In Direct-Fired Calciners, hot combustion gases pass directly over the tumbling bed. In Indirect Calciners, heat is conducted through an externally heated high-alloy retort wall, isolating process solids from combustion gases.
Temperatures up to 1100 °C
Heavy-wall heat resistant stainless steel (SS310S, Inconel 600, Alloy 800H) retorts designed for high thermal duty.
Atmosphere Control
Gas-tight mechanical face seals enable calcination under Inert (N2), Reducing (H2/CO), or Oxidizing atmospheres.
Uniform Temperature Profile
Multi-zone burner/electric heating control ensures precise thermal residence time along the drum length.
Heavy-Duty Mechanical Drive
Forged steel riding rings, heavy trunnion rollers, and variable frequency drive (VFD) girth gear assemblies.
- Calcination of Pigments (Titanium Dioxide, Iron Oxide) and Catalyst Carriers.
- Roasting of Mineral Ores, Zinc Concentrates, and Bauxite.
- Thermal decomposition of Carbonates, Nitrates, and Metal Salts.
- Regeneration of spent activated carbon and catalysts.
44+ Years of Engineering Experience
With over four decades of experience, Mathesis Engineers specializes in the design, engineering, fabrication, and commissioning of customized process equipment for diverse process industries.
Customized Engineering Solutions
Every Rotary Roasters & Calciners is engineered based on customer process parameters, operating conditions, material requirements, and project specifications.
Complete Mechanical Design
Our engineering team develops complete mechanical designs supported by practical manufacturing expertise and chemical engineering understanding.
Quality Manufacturing & Inspection
Equipment is fabricated under controlled manufacturing practices with third-party inspection whenever specified, ensuring compliance with ASME, IS, and international standards.
Comprehensive Project Support
From process engineering and fabrication to testing and commissioning support, we deliver customized process equipment solutions designed to meet customer requirements.