Capital Refractories

What Capital Refractories does

Capital Refractories Limited is a privately held, family-run UK manufacturer of refractory products and technical ceramics, founded in 1950 and headquartered in Clowne, Chesterfield. The company designs, manufactures, supplies, and installs refractory linings, crucibles, castables, gas diffusers (porous plugs), ceramic shapes, atomising nozzles, flow control systems, molten metal filters, and ancillary furnace equipment for high-temperature applications. Its products are sold under proprietary brand names including AtomiZIR nozzles, Caperdiff gas diffusers, Speed-Line precast blocks, Unibore with Autopour, the Coral range of spinel-forming ramming mixes (with service temperatures up to 1800°C), and the Bio range for waste-to-energy applications. The company operates 9 manufacturing and operations sites across the UK, United States, Czech Republic, China (via Capital Refractories (Shanghai) Technology Ltd.), and India (via Capital Refractories India Ltd.), with a workforce of approximately 250–300 employees.

The company serves enterprise customers in steel and non-ferrous foundries, steel mills, investment casters, superalloy master melters, aluminium melters, copper alloy producers, cement plants, crematoria, and waste-to-energy operators. It monetises primarily through direct hardware sales of refractory products and monolithic castables, complemented by professional services revenue from refractory engineering, installation, and on-site technical support (including on-site laboratory facilities). Pricing is quote-based and not publicly disclosed, reflecting custom-engineered solutions. Distribution is hybrid: direct sales from the UK headquarters combined with an extensive international distributor network covering more than 40 countries across Europe, Asia, Africa, North America, South America, the Middle East, and Oceania. The company also runs multi-channel marketing including trade shows (Aluminium Düsseldorf, GIFA, ICI events), webinars, industry publications, and a global distributor programme.

In September 2025, Capital Refractories divested its Capital Injection Ceramics Limited (CIC) subsidiary to Siemens Energy, allowing it to focus on ceramics shapes facilities and the monolithic business, while simultaneously committing to a multi-million-pound expansion of its slip-cast one-shot crucible facility in the Czech Republic. The company is ISO 9001 certified, UK GDPR compliant, and operates a documented Modern Slavery Statement under the Modern Slavery Act 2015.

Name

Capital Refractories

Legal name

Capital Refractories Limited

Website

https://capital-refractories.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

101–250 employees

Short description

Capital Refractories is a UK family-run manufacturer of refractory products and technical ceramics, supplying furnace linings, crucibles, castables, gas diffusers, and ceramic shapes to metal melters, foundries, and cement producers across 40+ countries via 9 global manufacturing sites.

Ownership category

akta.pro rank

Product category

Industrial Refractories

NAICS

Clay Building Material and Refractories Manufacturing (32712)

SIC

Abrasive, Asbestos & Misc Nonmetallic Mineral Prods (3290)

akta.pro primary industry

Refractory Bricks & Firebricks (IMADABAG)

akta.pro secondary industries

Refractory, Furnace & Kiln Maintenance Services (IMAIACAG), Aluminum Smelter/Refinery Technology, Equipment & Refractories (IMAKACAL)

Keywords

• Refractory products manufacturing
• Industrial furnace linings
• Technical ceramics production
• Molten metal filtration
• High temperature materials

Headquarters

HQ city

Chesterfield

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Refractory Products: Manufacturing and supply of refractory linings and associated products including coreless induction furnace linings, crucibles, castables, gas diffusers, ceramic shapes, and ancillaries to metal melters, foundries, and cement industries worldwide.
2. Installation Services: Refractory engineering, installation, and repair services including team of experienced engineers and installers for cremator and furnace building and repair.
3. Technical Support: Technical support, advice, and assistance including on-site laboratory facilities and refractory design services.
4. Monolithic Castables: Full range of monolithic refractories including MC, LC & ULC castables, free-flowing grades, and insulating products for waste-to-energy, aluminium, steel and foundry sectors.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Capital Refractories manufactures, supplies, and installs refractory products for metal melters worldwide. Its portfolio includes coreless and channel induction furnace linings, castables and gunning materials, crucibles, gas diffusers, atomising nozzles, ceramic shapes, flow control nozzles and ladle systems, engineered tortuosity molten metal filters, and ancillary products. The company serves steel and non-ferrous foundries, steel mills, investment casters, aluminium and copper melters, powder metallurgy operations, superalloy producers, cement plants, crematoria, and waste-to-energy facilities.

Product overview

Capital Refractories is a refractory products manufacturer offering a comprehensive portfolio of industrial furnace linings and technical ceramic products. The company's core offerings include coreless induction furnace linings (dry rammed, toppings, coil screed, repair materials), castables and gunning materials (LCC, MCC, self-flowing, phosphate bonded), crucibles (one-shot and multi-use for investment casting), ceramic shapes (tundishes, distribution boxes, pouring cups), gas diffusers/porous plugs (Caperdiff, Caprax lines), atomising nozzles (AtomiZIR, composite nozzles), flow control nozzles and ladle systems (Unibore, RCN), filters (engineered tortuosity molten metal filters), and a full range of ancillaries (electrodes, formers, insulation, vibration equipment, temperature measurement, wash coats). Products serve diverse industries including steel foundry, aluminium, copper alloys, iron, investment casting, powder metallurgy, superalloys, precious metals, cement, crematoria, and waste-to-energy. The company also developed innovative products like Speed-Line precast blocks for aluminium rotary furnaces and ladle opening systems.

Differentiator

Problem solved

Functional benefit

Brands

• Capital Injection Ceramics Limited (CIC): A subsidiary of Capital Refractories specialising in injection ceramics, acquired by Siemens Energy in 2025.

Products and services

• Coreless Induction Furnace Linings Dry rammed linings, topping and spout materials, coil screed (grout), slip plane materials, and repair materials for coreless induction furnaces used in metal melting applications across steel, foundry, and powder metallurgy industries.
• Castables and Gunning Materials Extensive range of castable solutions including low cement castable (LCC), medium cement castable (MCC), self-flowing castables, and phosphate bonded products for installation methods including vibration casting, ramming, pouring, pumping, gunning and troweling across aluminium, steel, foundry, cement, and waste-to-energy sectors.
• Atomising Nozzles Atomising nozzles in zirconia and zircon materials for water and gas atomisation of ferrous and non-ferrous metals including aluminium, lead, iron, steels and super alloys. Includes the AtomiZIR nozzle line and composite nozzles with calcium, magnesium and rare earth oxide stabilising agents for thermal shock resistance.
• Gas Diffusers (Porous Plugs) Pressed and fired permeable alumina diffusers for induction furnaces and steel ladles. Includes Caperdiff 94AL for ferrous and non-ferrous applications, Caperdiff 90ALR modified for aluminium resistance, and Caprax ASF DP products, designed to last the life of the lining.
• Ceramic Shapes Ceramic shapes for molten metal melting and handling including pouring cups, tundishes, distribution boxes for superalloy master melt industry, and precast ceramic components for steel, foundry, investment casting, copper alloys, and iron applications.
• Flow Control Nozzles and Ladle Systems Complete range of flow control solutions including Unibore, Unibore with Autopour, Rotary Control Nozzle System (RCN), and Foundry Nozzles for steel, foundry, and atomising applications.
• Rammables, Mortar and Plastics Chemically bonded refractory products including Capram 60, 70, 90 for patching, toppings and spouts; D10 and D11 patching plaster materials; WS90 Rammable for ladles, receivers and linings; phosphate and silicate bonded products for foundry, iron, and copper alloy applications.
• Waste to Energy Products (Bio Range) Bio range of products for waste to energy and incineration applications including BioCast, BioFlo, BioGun, and Pbond product lines designed for vibration cast, free flow, gunnable and phosphate bonded applications with oxidation and slag corrosion resistance.
• Crucibles One-shot and multi-use crucibles for investment casting, copper alloys, and iron applications, including backing powder and one-shot liner products manufactured at the Czech Republic slip-cast facility.
• Molten Metal Filters Engineered tortuosity molten metal filters and carbon bonded filters for filtration applications in steel, foundry, and refractory industries.
• Shell Making Products Products for investment casting shell building processes.
• Channel Induction Furnace Linings Furnace lining solutions specifically designed for channel induction furnaces used in copper and copper alloy and iron melting applications.
• Ancillaries Wide range of ancillary refractory installation accessories including Earth Leakage Electrodes (Spiders), Furnace Formers, Insulation Materials, Slip Plane Material (Mica), Temperature Measurement equipment, Vibration Equipment, and Wash Coats.
• Refractory Engineering and Installation Services Refractory engineering, installation, and repair services with a team of experienced engineers and installers for cremator and furnace building, repair, and on-site technical support across global customer sites.

Quantifiable outcome

• OSHA compliant products for modern respirable silica levels
• +1 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered major, minor and core.

• Siemens EnergymajorStrategic or Co-development Partner · 1 September 2025Capital Injection Ceramics Limited (CIC), a subsidiary of Capital Refractories, was acquired by Siemens Energy. This divestiture enables Capital Refractories to strategically streamline its portfolio while CIC continues as a dedicated subsidiary of Siemens Energy with the same leadership team.
• United Way ChennaiminorStrategic or Co-development Partner · 1 January 2025CSR partnership focused on social responsibility. Capital Refractories partnered with United Way Chennai to deliver support to improve the lives of adults and children with disabilities, providing upgraded wheelchairs to 25 individuals and supporting broader social inclusion initiatives.
• Bolsover Net Zero Innovation ProgrammeminorStrategic or Co-development Partner · 1 January 2025Sustainability partnership focused on carbon management training and environmental leadership. QA Manager Kelly Harrison participated in the programme to gain knowledge on calculating and managing carbon emissions, with strategies aligned to UN Sustainable Development Goals.
• CZ KeravitcoreStrategic or Co-development PartnerTwo-way partnership where CZ Keravit represented Capital products within the Czech Republic while Capital supported promotion of their products within the UK market. Their collaboration helped establish SRO, which became a major part of Capital's future growth and manufacturing capability.
• MagotteauxcoreChannel Partner/ Reseller/ DistributorPartnership established early in Capital's international expansion, securing the Magotteaux contract which remains in place decades later.
• Coastal (USA)minorChannel Partner/ Reseller/ DistributorTolling arrangement established in the United States including transfer of Penn mixer to support production operations. Later resulted in Capital acquiring the company during business transition discussions.

Scale indicators7 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Vesuvius plc: Global supplier of refractory products and services to the steel, foundry, and aluminium industries, with strong flow control and tundish product lines. Overlaps directly with Capital's flow control nozzles, ladle systems, and ceramic shapes.
• Resco Products: Manufacturer of refractory products including monolithic castables, gunning materials, and ceramic shapes serving steel, aluminium, and foundry customers. Closely comparable mid-sized independent peer.
• Plibrico Company: Independent refractory contractor and manufacturer of monolithic refractories serving steel, aluminium, cement, and waste-to-energy industries in North America. Closely comparable as a family/independent-style refractory specialist with installation services.
• HarbisonWalker International (HWI): Major North American producer of monolithic and shaped refractories serving steel, aluminium, glass, and cement. Directly comparable in product mix, end markets, and customer type to Capital.
• RHI Magnesita: Largest global refractory manufacturer offering monolithic, shaped, and preformed refractory products to steel, cement, and non-ferrous metals industries. Direct competitor to Capital across product lines and end markets, with overlapping global distribution.

Regional players

• Puyang Refractories Group: Major Chinese refractory producer with strong Asia footprint serving steel, cement, and non-ferrous metals. Regional peer that Capital competes against in its Asia distributor markets.

Broad incumbents

• Morgan Advanced Materials: Producer of advanced ceramics including technical ceramics for molten metal handling, atomising nozzles, and high-temperature applications. Comparable in the technical ceramics / atomising nozzle space that Capital serves.
• Imerys Refractory Solutions: Specialty minerals group with a dedicated refractories division producing monolithic and shaped products for high-temperature industries. Wider portfolio than Capital but directly comparable in refractory minerals, castables, and installed solutions.
• Saint-Gobain Performance Ceramics & Refractories: Global industrial materials giant with refractory systems and ceramic shapes for steel, foundry, and aluminium. Competes in similar end markets but as part of a much broader portfolio of building materials and engineered solutions.

Emerging players

• Almatis: Specialty producer of premium alumina-based refractory raw materials and products serving cement, steel, and aluminium industries. Comparable as an upstream/adjacent refractory specialist.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCvLbfEqNAPPodUXGx_hjXRw
• Facebookfacebook.com/capitalrefractoriesuk
• LinkedInlinkedin.com/company/capital-refractories

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

Funding overview

Funding rounds

Investors

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

M&A1 record

Investments

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

Frequently asked questions about Capital Refractories