Calcinor

What Calcinor does

Calcinor, S.A. is a privately held, family-controlled Spanish holding company headquartered in Altzo (Gipuzkoa), founded in the 1950s and consolidated under the Calcinor name in 1990. The group comprises 25+ subsidiary companies and operates across Spain, France, Morocco, Austria, Slovakia, and — since 2025 — the United States, with sales and exports reaching five continents. Calcinor is dedicated to the extraction, calcination, hydration, micronization, and precipitation of calcium and magnesium-based industrial minerals, serving four end-markets: industrial (iron and steel, metallurgy, paper, glass, ceramics, chemicals, paints, adhesives, rubbers, mining, plastics), construction (civil works, building, soil stabilization), environment (water, sludge, and gas treatment), and agri-food (agriculture, livestock, animal feed, sugar, human consumption).

The company's core technology stack spans integrated production from limestone extraction through calcination furnaces and lime processing to specialty Precipitated Calcium Carbonate (PCC). It holds proprietary processes including CALCITALAVADA (>99% CaCO3 water remineralisation, zero finings), REFRA-DOL (world-unique sintered dolomite with high hydration resistance), and a tightly controlled PCC process yielding <2 micron particle sizes. Its branded portfolio includes STABYCAL (soil stabilization), NATURDEP (gas decontamination), CALINTEC (micronized CaO), CALHIDROX (water-treatment Ca(OH)2), CALPREC (PCC), REFRA-DOL (sintered dolomite), ARIBLANC PLUS (micronized white CaCO3), and CALCITALAVADA. Quality assurance rests on an in-house physical/chemical laboratory and a broad certification stack (ISO 9001/14001/45001/50001, CE, GMP+, ECOCERT, UNE EN 12518, UNE EN 1018).

Calcinor's business model is B2B direct sales to industrial customers, organized around regional manufacturing subsidiaries (Calera de Alzo, Dolomitas del Norte, CAPLANSA, CALCASA, ANCASA, Calmit Llierca), distribution entities (EUROCHO in France) and joint ventures (Lafarge Calcinor Maroc; Calmit Holding with Schmid Industrieholding covering Central Europe). Pricing is quote-based and not publicly disclosed. Revenue derives from one-time product sales of oxides, hydroxides, carbonates, dolomites, refractories, sintered products, aggregates, mortars, concretes, asphalts, and specialty calcium products, with named enterprise customers including Acerinox (steel) and paper mills.

Name

Calcinor

Legal name

Calcinor, S.A.

Website

https://calcinor.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

101–250 employees

Short description

Calcinor is a family-owned Spanish holding company that manufactures calcium and magnesium-based industrial minerals — quicklime, slaked lime, dolomite, PCC, refractories, aggregates, mortars and asphalts — through 25+ subsidiaries serving industrial, construction, environmental and agri-food customers across Europe, Africa and North America.

Ownership category

akta.pro rank

Product category

Industrial Minerals

NAICS

Crushed and Broken Limestone Mining and Quarrying (212312), Ground or Treated Mineral and Earth Manufacturing (327992), Other Nonmetallic Mineral Mining and Quarrying (21239), Kaolin, Clay, and Ceramic and Refractory Minerals Mining (212323), Clay Building Material and Refractories Manufacturing (32712)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400), Industrial Inorganic Chemicals (2810), Wholesale-Metals & Minerals (No Petroleum) (5050)

akta.pro primary industry

Calcium Carbonate (GCC/PCC) (IMAEAFAA)

akta.pro secondary industries

Limestone Quarrying (Industrial & Construction Grade) (IMAKAHAC), Industrial Minerals Trading (Phosphate, Potash, Sulfur, Borates, Barite, Talc) (IMAKAJAF), Mineral/Particulate Thickeners (Silicates, Clays, Calcium Carbonate as texturizers) (AFAJAMAJ)

Keywords

• Industrial minerals
• Calcium carbonate
• Quicklime production
• Dolomite refractories
• Lime derivatives

Headquarters

HQ city

Urnieta

HQ country

Spain

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Infrastructure, Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Industrial Minerals Products: Calcinor generates revenue through the sale of calcium and magnesium-based industrial minerals including oxides, hydroxides, carbonates, dolomites, refractories, sintered products, aggregates, mortars, concretes, asphalts, and specialty calcium products for various industrial applications.

Go-to-market motion1 record

Distribution channels5 records

Marketing channels3 records

Core offering

Calcinor is dedicated to the preparation of industrial minerals used as chemical reagents, manufacturing and supplying calcium and magnesium-based products including oxides (calcium oxide/quicklime, calcined dolomite), hydroxides (calcium hydroxide, dolomite hydroxide), Precipitated Calcium Carbonate (PCC), refractories, sintered products, carbonates, aggregates, mortars, concretes, asphalts, gypsum and talc. The group operates an integrated value chain from limestone quarrying through calcination, hydration, micronization and precipitation processes, distributing products through subsidiary companies across Spain, France, Morocco, Austria, Slovakia and the USA.

Product overview

Calcinor is an industrial minerals company dedicated to the preparation of chemical reagents, offering a comprehensive portfolio of calcium-based products organized into two main divisions: calcined products (Oxides and Hydroxides) and differentiated specialty products (PCC, refractories, sintered products). The core product lines include Calcium Oxide (quicklime), Calcined Dolomite, Calcium Hydroxide (slaked lime), Dolomite Hydroxide, Precipitated Calcium Carbonate (PCC), Refractories, Sintered Products, Carbonates, Aggregates, Concretes and Mortars, Asphalts, Putty and Limewater, Gypsum, and Talc. These products are distributed through branded sub-products including STABYCAL (soil stabilization), NATURDEP (gas decontamination), CALINTEC (micronized lime), CALHIDROX (water treatment lime), CALPREC (precipitated calcium carbonate), REFRA DOL (sintered dolomite), ARIBLANC PLUS (micronized calcium carbonates), and CALCITALAVADA (water remineralisation). Calcinor serves four major sectors: Industry (iron and steel, metallurgy, paper, glass, ceramics, chemicals, paints, adhesives, rubbers, mining, plastics), Construction (civil works, building, soil stabilization), Environment (water treatment, sludge treatment, gas treatment), and Agri-Food (agriculture, livestock, animal feed, sugar, human food). The company operates production plants across Spain, France, Morocco, Austria, and Slovakia, including Calera de Alzo, Calmit Llierca, Cales de la Plana, Cal de Castilla, Andaluza de Cales, Dolomitas del Norte, Lafarge Calcinor Maroc, and Eurocho.

Differentiator

Problem solved

Functional benefit

Brands

• STABYCAL®: Product range for optimizing clay soil stabilization processes with lime, including STABYCAL and STABYCAL SP variants for reduced dust generation
• NATURDEP®
• CALINTEC®
• CALHIDROX®
• CALPREC®
• REFRA®DOL
• ARIBLANC PLUS®
• CALCITALAVADA

Products and services

• Calcium Oxide (Quicklime) Calcium oxide (CaO) produced through calcination of limestone, used in the iron and steel industry, metallurgy, chemical industry and various industrial applications.
• Calcined Dolomite Calcium and magnesium oxide (CaO-MgO) produced from dolomite calcination, used in metallurgy and refractory applications.
• Calcium Hydroxide (Slaked Lime) Slaked lime (CaOH2) used in water treatment, construction, agriculture and environmental applications for its neutralising and sanitising properties.
• Dolomite Hydroxide Calcium and magnesium hydroxide derived from dolomite, used in similar applications as calcium hydroxide with additional magnesium benefits.
• Precipitated Calcium Carbonate (PCC) High-purity calcium carbonate produced through chemical transformation and purification processes, with narrow particle size distribution (less than 2 microns) for specialised industrial applications.
• Refractories Refractory materials including dolomite-based products for high-temperature industrial applications in steelmaking and metallurgy.
• Sintered Products (REFRA-DOL) Sintered dolomite products including REFRA-DOL with high hydration resistance for refractory applications in contact with water or aqueous additives.
• Calcium Carbonate Natural calcium carbonate (CaCO3) extracted from quarries, used in construction, as filler, and various industrial applications.
• Dolomite Calcium and magnesium carbonate (Ca-Mg-CO3) used in the iron and steel sector, agriculture, water treatment and construction.
• Natural Aggregate Natural aggregates from limestone and dolomitic sources used in construction, road building and concrete manufacturing.
• Mortar Construction mortar products incorporating calcium-based binders for various building applications.
• Concrete Concrete products including refractory concretes like KELAL for aluminum industry maintenance furnaces.
• Asphalt Bituminous mixes and asphalt products using micronised calcium carbonate as filler for road construction.
• Lime Putty Lime putty (slaked lime paste) used in construction, restoration and historical building applications.
• Milk of Lime Lime milk suspension (lime putty in water) used for pH adjustment, water treatment and gas scrubbing applications.
• Gypsum Gypsum products for construction and agricultural applications.
• Talc Talc products supplied through Calmit Holding subsidiaries (Eurotalc, Eurominerals) for industrial applications including paints, polymers, pharmaceuticals and paper.
• STABYCAL Soil Stabilisation Range Product range of calcium oxide and hydroxide optimised for reactivity and yield in clay soil stabilisation processes, including the STABYCAL SP variant designed to reduce dust generation during application.
• NATURDEP Gas Decontamination Range Specialised calcium products for gas decontamination and environmental treatment, designed for acid gas capture with high reactivity and efficiency; includes NATURDEP-M, NATURDEP-CLM, NATURDEP-S and NATURDEP-SCS variants.
• CALINTEC Micronized Calcium Oxide Micronised calcium oxide with controlled particle size distribution centred at 40 microns, high reactivity due to narrow distribution, and excellent fluidity for improved dispersion in industrial applications.
• CALHIDROX Calcium Hydroxide for Water Treatment High-purity calcium hydroxide designed for human consumption water treatment, guaranteeing performance through strict mineral selection and compliance with UNE EN 12518 standards.
• CALPREC Precipitated Calcium Carbonate Range Range of high-quality Precipitated Calcium Carbonate (PCC) grades used in multi-sectoral chemical formulations, developed through continuous R&amp;D investment and decades of experience; includes CALPREC PA (controlled particle sizes) and CALPREC PR (coated) grades.
• REFRA-DOL Sintered Dolomite Sintered dolomite with high resistance to hydration, used as raw material for refractories suitable for applications in contact with water or aqueous additives, including for ladles and electric arc furnaces.
• ARIBLANC PLUS Micronised White Calcium Carbonates Range of micronised white calcium carbonates with high purity (over 99% calcium carbonate content), without humidity, adapted to industrial applications requiring high-quality raw materials.
• CALCITALAVADA Water Remineralisation Product Top-range product for water remineralisation with calcite beds (1/3 mm), calcium carbonate content greater than 99% and complete absence of finings, guaranteed non-turbidity in mineralised water.

Quantifiable outcome

• Calcium carbonate content greater than 99% in CALCITALAVADA and ARIBLANC PLUS products
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• CO2 Hub Basque Country PartnerscoreStrategic or Co-development Partner · 1 April 2026Calcinor participates in creation of pioneering CO2 hub in the Basque Country alongside industrial and energy companies to drive industrial decarbonization and develop integrated carbon management solutions.
• EnagáscoreStrategic or Co-development Partner · 1 May 2025Strategic collaboration agreement signed in May 2025 to jointly develop CO2 capture and sustainable management projects. Agreement enables progress toward complete value chain in CO2 management with potential to reduce 900,000 tonnes of emissions annually.
• Kelsen Refractories USA Inc.minorStrategic or Co-development Partner · 1 February 2025Calcinor established Kelsen Refractories USA Inc. for expansion into the US market, acquiring a refractory manufacturing plant in Tarentum, Pennsylvania. Part of growth strategy and international expansion.
• Schmid IndustrieholdingcoreStrategic or Co-development Partner · 1 January 2016Joint venture creating Calmit Holding GmbH (formerly Eurofillers) combining Schmid Industrieholding's industrial minerals operations with Calcinor's calcium expertise. Includes EuroMinerals (Austria), Eurotalc (Slovakia), and Calmit (Central Europe). Brands marketed include Inbond, Incomp, Indolo, Intalc, Inzeo, Inpcc, and Inlime.
• Lafarge MaroccoreStrategic or Co-development Partner · 1 January 2011Joint venture established in 2011 creating Lafarge Calcinor Maroc (LCM). Lafarge Maroc brought local market presence and Calcinor contributed technical expertise in calcium products. LCM is now the leading producer of lime and dolomite in the Moroccan market and participates in export operations.
• EULA (European Lime Association)minorOthersCalcinor belongs to European Lime Association (EULA), an industry association representing lime producers in Europe.
• International Lime Association (ILA)minorOthersCalcinor belongs to International Lime Association, a global industry association for lime producers.
• Industrial Minerals Association Europe (IMA-Europe)minorOthersCalcinor belongs to Industrial Minerals Association Europe.
• Calcium Carbonate Association (CCA) EuropeminorOthersCalcinor belongs to Calcium Carbonate Association Europe.
• Confederación de Industriales Extractivas de Rocas y Minerales Industriales (COMINROC)minorOthersCalcinor belongs to Spanish confederation of extractive industries for rocks and industrial minerals.
• ANCADEminorOthersCalcinor belongs to ANCADE industry association.

Scale indicators8 records

Recent moves12 records

Expansion highlights6 records

Direct peers

• Graymont: Canadian privately held lime and limestone producer with operations across North America and the Asia-Pacific. Comparable to Calcinor in product mix (high-calcium and dolomitic lime, specialty products) and in serving steel, construction, environmental, and chemical industries.
• Carmeuse: Belgian-headquartered global lime and limestone producer with operations across Europe, North America, and Africa. Closely comparable to Calcinor in product portfolio (high-calcium and dolomitic lime, aggregates, specialty products) and in serving steel, environmental, construction, and agricultural end markets.
• Minerals Technologies Inc. US-listed specialty minerals company with a major PCC franchise and refractories business. Direct peer in PCC production technology (CALPREC comparable) and in serving paper and steel customers. MTI's Specialty Minerals and Refractories segments overlap materially with Calcinor's differentiated products.
• Lhoist Group: Belgian family-owned global leader in lime, dolime, and minerals. Most direct peer to Calcinor with comparable product range (quicklime, hydrated lime, dolomite, specialty products), end markets (steel, construction, environment, agriculture), and integrated quarry-to-customer value chain. Lhoist is significantly larger and globally diversified.
• Nordkalk: Nordic/Baltic leading producer of limestone-based products including quicklime, hydrated lime, PCC, ground calcium carbonate, and aggregates. Direct peer to Calcinor in PCC (CALPREC comparable) and in lime/calcium carbonate applications across industrial and environmental markets.

Broad incumbents

• Omya: Swiss privately held global producer of industrial minerals including ground and precipitated calcium carbonates, talc, and specialty fillers. Closely comparable to Calcinor's CALPREC PCC, ARIBLANC PLUS, and calcium carbonate filler business serving paper, paints, plastics, and adhesives.
• Imerys: French-listed global leader in mineral-based specialty solutions with broad portfolio including calcium carbonates, PCC, talc, and refractories. Comparable to Calcinor in calcium carbonates, PCC, and talc product lines (overlapping with Calmit JV brands). Imerys is a much larger, publicly listed diversified specialty minerals incumbent.
• SCR-Sibelco: Belgian global industrial minerals company producing silica, calcium carbonates, feldspar, and talc. Comparable to Calcinor in calcium carbonates and talc (overlapping with Calmit's EuroTalc JV) and in serving similar industrial end markets across Europe and globally.

Regional players

• Mississippi Lime Company: US-based vertically integrated lime producer with high-purity limestone reserves, calcination, and hydrated lime products. Comparable to Calcinor's quicklime and hydrated lime business; particularly relevant given Calcinor's 2025 US entry via Kelsen Refractories.
• Fels-Werke: German privately held lime and limestone producer serving Central European steel, construction, and environmental markets. Comparable to Calcinor in lime/calcium products and in serving similar German/European industrial customers; relevant peer for Calmit Holding's Central European footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/calcinor-s-a-

Compliance30 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calcinor