Refractory installation


Calderys has recently completed a turnkey installation of the refractory lining for a 130 MW, biomass-fired CFB in Spain for a major Scandinavian boiler manufacturer. This project is the most recent addition to the Calderys portfolio of successes in the global biomass power industry. Located adjacent to an associated paper mill, this boiler will burn a combination of paper mill waste and domestic waste from the town of Zaragoza to provide electricity and some steam to the paper mill.

For this project, Calderys turnkey installation services included:

Design and Engineering:
Lining design and material selection:
Thin refractory lining on tube-walls with thicknesses varying from 30 to 60 mm top of tube for this highly efficient WTE (waste-to-energy) system.
For vertical walls our self-flowing castables have been preferred to ensure a perfect filling.

Very high Alkali resistant products, designed for biomass & incinerators, have been chosen: CALDE™ FLOW LF 50 A for the lower furnace, wall and cone of the cyclone and loop seal. Where excellent abrasion resistance is needed, in addition to alkali resistance, our CALDE™ FLOW LM 74 A has been installed into such parts as the cyclone inlet and cyclone target wall (with offset joints between the panels to minimize the abrasion of the joints).

For the roofs LPGM (Low Porosity Gunning Materials), dense gunning castables, have been installed: CALDE™ GUN LS 30 for furnace roof, CALDE™ GUN LB 85 for cyclone roof, and CALDE™ GUN LF 52 A in other roofs. CALDE™ STIX PB 85 has ensured the junction between roofs and walls.

The upper furnace walls and wing walls required a very thin lining of 30 mm top of tube with a product presenting a very high heat transfer, therefore a phosphate bonded 85 % Silicon Carbide ramming has been installed: Keraplan SiC V-85-E, thanks to its numerous references.

Thermal calculations, bill of materials, and installation design drawings.

Material Supply: global network of manufacturing plants featuring rigorous quality control, customized packing and marking, and logistics services including partial deliveries to avoid storage problems on site.

Site Management: installation procedures and quality control, health and safety management, and installation progress tracking and reporting every day to the OEM representative by our site manager.

Comprehensive Installation Services – equipment supply, labor, supervision, dry-out, method statements and manpower planning, and onsite testing.

Commissioning – as-built drawings, operation manual, completion certificate, and warrantee.
Inside view of the combustion chamber with burners’ blocks, from bottom.
Inside view of the combustion chamber with burners’ blocks, from bottom.
Blowing nozzles
Blowing nozzles


The unique ability of Calderys to offer single sourcing for projects of this type has been recognized and utilized with great success by OEM’s, EPC’s, installation contractors, and end-users around the globe. Recent biomass projects have included circulating fluidized bed, bubbling bed, and traveling grate boilers.

As the world leader in monolithic refractories, Calderys continues to develop not only innovative refractory products, but innovative refractory solutions.

For more details, Ask our expert!

About Calderys

Our mission is to help you meet your ever increasing production and productivity targets, whilst protecting the safety of your people and the integrity of your equipment. Our focus is to deliver safe, reliable and high performing refractory solutions customized to your needs. Our international production and sales facilities allow us to develop and deliver customized solutions based on monolithic and ready shape monolithic refractory materials worldwide in a fast, efficient, and safe manner.

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