Highland manufactures the full spectrum of monolithic refractory materials — high-alumina castable (Al₂O₃ 45–99%, CCS ≥60–100MPa), low-cement castable, corundum castable, steel fiber-reinforced wear-resistant castable, refractory plastic, gunning mix, and ramming mass — alongside ceramic fiber products and refractory cement. All grades are produced under ISO 9001:2015 quality management with batch-level XRF chemical certification. Standard grades ship within 30–40 working days. Custom compositions and non-standard particle sizing are available from drawing confirmation. Steel, cement, glass, and non-ferrous smelting applications. Submit your equipment specification for material grade recommendation.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
Clay powder is a powdery material with clay minerals as the main component.
Refractory cement, also known as aluminate cement, is a fire-resistant hydraulic cementitious material.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
Clay powder is a powdery material with clay minerals as the main component.
Refractory cement, also known as aluminate cement, is a fire-resistant hydraulic cementitious material.
High alumina fine powder is a powder material with alumina (Al2O3) as the main component.
6 product groups covering steel, cement, glass, non-ferrous and foundry applications. Select the group matching your equipment type and operating condition.
Operating range: 1600–1800°C | Steel ladle · Blast furnace · Cement kiln · Glass furnace
Al₂O₃ content range
45 – 99%
CCS ≥60 – 100 MPa
Operating range: 1400–1700°C | Furnace throat · Taphole · High-velocity gas zones · Cyclone preheater
CCS after firing
≥80 MPa
2× wear resistance vs. standard
Hot repair without shutdown · Joint filling · Surface patching · ≤2h cure time
Max service temp
1600°C
Hot repair capable
Operating range: 1500–1750°C | Iron ladle · Steel ladle · Torpedo car · Tundish
Slag erosion rate
≤0.3
cm/year
Operating range: up to 1400°C | Backup lining · Expansion joints · Furnace door sealing · Pipe insulation
Thermal conductivity
≤1.2
W/(m·K)
For in-house mix operations · Foundry sand systems · Custom batch formulation
Aggregate purity
≥98%
Impurities ≤0.5%
Conventional castable refractory uses calcium aluminate cement as the primary binder, typically at CaO content of 8–15%. While this provides adequate bonding strength at room temperature, the calcium aluminate hydrate phases formed during curing begin to decompose between 600–900°C, creating a temporary strength loss zone — often called the "strength valley" — that makes conventional castable vulnerable to thermal shock during the heat-up phase. Low-cement castable (CaO ≤2.5%) replaces most of the cement binder with reactive alumina micropowder and colloidal silica, which form permanent ceramic bonds at elevated temperature. The result is significantly higher hot modulus of rupture above 1000°C, better slag corrosion resistance due to lower CaO content, and elimination of the strength valley. For applications above 1400°C or in direct slag contact zones, low-cement or ultra-low-cement castable is the technically correct specification. Highland supplies both grades with full batch XRF certification — contact us with your operating temperature and slag chemistry for a specific grade recommendation.
Steel ladle working lining selection depends on three variables: steel grade processed, tapping temperature, and desulphurization / refining practice. For carbon steel ladles at tapping temperatures below 1650°C without strong desulphurization, high-alumina castable (Al₂O₃ 70–75%) provides an adequate cost-performance balance with a campaign life of 80–120 heats. For ladles handling low-carbon or stainless steel grades, or where refining treatments push temperature above 1680°C, corundum castable (Al₂O₃ ≥90%) is required — its low iron content prevents steel contamination and its dense matrix resists the aggressive basic slag generated during refining. For ladles with strong argon stirring or RH degassing treatment, steel fiber-reinforced corundum castable adds thermal shock resistance to counteract the thermal cycling induced by injection processes. Submit your ladle capacity, steel grade, and heat cycle frequency — we will specify the correct grade with expected campaign life estimate.
Yes, with the correct material selection. Highland's high-temperature mending mortar is specifically formulated for hot repair on active furnaces — it bonds to existing refractory surfaces at temperatures up to 800°C without requiring surface cooling, achieves initial set within 2 hours, and reaches full service strength within 24 hours at operating temperature. For larger patch areas on furnace sidewalls or ladle lips, refractory gunning mix (applied by pneumatic gunning equipment) can repair zones of 0.1–2.0m² without shutdown, provided the surface temperature is within the material's application window. The critical limitation of hot repair is surface preparation: loose or heavily eroded substrate must be removed before patching — applying mending mortar over a soft or crumbling surface will not restore structural integrity. We recommend contacting us with a photo and dimensions of the damaged zone before ordering repair materials — this allows us to confirm whether hot repair is viable or whether a planned cold repair with a higher-performance material is the more cost-effective solution.
The cement kiln transition zone — the section between the burning zone brick lining and the cooler inlet castable — is one of the most technically demanding castable applications because it combines three simultaneous stresses: peak thermal load (900–1100°C shell temperature), heavy coating-shedding impact, and exposure to partially calcined clinker dust with significant alkali content. The minimum specification for this zone is Al₂O₃ ≥70% with a cold crushing strength ≥80MPa after 1100°C firing, combined with alkali resistance testing (ASTM C454 or equivalent). At Al₂O₃ content below 70%, the castable's mullite matrix is susceptible to alkali-silicate reactions that progressively destroy the bonding phase — leading to surface dusting and accelerated erosion within the first 6 months. For kilns with high-sulfur fuels or alternative fuel firing (tyres, biomass, municipal waste), alkali loading increases significantly and Al₂O₃ ≥75% with SiC addition (5–8%) is recommended to form a protective glaze under cyclic oxidizing/reducing conditions. Provide your kiln internal diameter, transition zone length, and fuel type for a specific grade recommendation.
Highland's minimum order quantity for custom-composition castable is 5 metric tons per grade. Custom composition includes adjustments to Al₂O₃ content, aggregate particle size distribution, binder system (cement-bonded vs. chemically bonded vs. colloidal silica-bonded), additive package (SiC addition, steel fiber content, anti-explosive fiber inclusion), and setting time. For custom grades, lead time is 40–60 working days from the date of drawing and composition specification confirmation — this covers raw material sourcing, laboratory trial batch, physical property testing, and full production run with batch certification. For standard-grade castables (high-alumina, low-cement, corundum grades in standard particle sizing), the minimum order quantity is 3 metric tons and lead time is 30–40 working days. Emergency small-quantity supply for repair applications (minimum 500kg) is available from stock for selected standard grades — contact us with your required grade and quantity for stock availability confirmation within 2 business hours.
Backed by decades of expertise, Highland Refractory delivers tailored refractory brick solutions across steel, cement, glass, and petrochemical industries. Trusted by global manufacturers, our products ensure long service life, efficiency gains, and cost savings—with on-site technical support to guarantee optimal performance for every client.
Manufacturers of refractory products often struggle with rigid traditional materials they’re hard to shape for custom fire bricks or lightweight refractories, and bonding clay bricks often lacks strength. Highland Refractory’s Monolithic Refractories solve this: monolithic castable refractory has good flowability, making it easy to mold into fire bricks or lightweight refractory parts (with a refractoriness of 1650℃ and 20% weight reduction vs. dense bricks). Our refractory cement boosts bonding strength by 30%, perfect for joining clay bricks or securing lightweight materials. As a reliable monolithic refractories ltd, we cut production complexity and costs, ensuring your refractory products meet diverse size and performance needs.
Steel plants face frequent issues: converter and electric arc furnace linings wear fast, furnace throats crack under high heat, and emergency repairs take too long causing costly downtime. Highland’s Monolithic Refractories fit perfectly: steel fiber-reinforced wear-resistant castable (cold compressive strength ≥80MPa) resists erosion on furnace inner walls; high-temperature repair mortar cures in 2 hours and withstands 1700℃ instantly, fixing kiln doors or feed ports quickly. Ordinary monolithic castable refractory lines insulation layers, lowering heat loss by 15%. These products extend equipment service life by 30%, eliminating frequent shutdowns and aligning with steel production demands.
Metallurgical facilities battle two key problems: high-temperature furnace linings (made with bauxite) erode easily, and foundry sand lacks enough strength to hold shapes. Highland’s solutions address both: high-alumina monolithic castable refractory (refractoriness 1750℃) forms durable furnace linings that resist slag corrosion 2x better than traditional bricks. Our refractory ramming mass (bulk density ≥2.6g/cm³) works as strong foundry sand, while refractory cement bonds bauxite-based linings tightly. As trusted monolithic refractories ltd, we ensure your furnaces run longer and foundry parts have precise shapes solving “short lining life” and “poor sand stability” pain points.
Chemical plants struggle with high-temperature reactors and corrosion-resistant equipment linings often fail due to acid/alkali attacks, and catalyst carriers lack stability. Highland’s Monolithic Refractories resolve this: corrosion-resistant monolithic castable refractory (resists most acids/alkalis except hydrofluoric acid) lines reactor inner walls, preventing leaks. Our corundum-based monolithic castable refractory acts as a stable catalyst carrier, maintaining performance even at 1800℃. Refractory cement secures all parts tightly, avoiding gaps where chemicals could seep. These products extend equipment life by 2x, ensuring safe, continuous chemical production backed by our expertise as a reliable monolithic refractories ltd.
To ease concerns over opaque processes and unstable quality, Highland Refractory details its monolithic refractory production and strict controls. First, raw materials are inspected: high-purity aggregates (e.g., bauxite) with impurities ≤0.5% and binders (purity ≥99%) are selected. Next, precise batching—automated dosing per formula, like a 3:1 aggregate-to-cement ratio for refractory castable.
Mixing is tailored: refractory castable is water-mixed to 150mm flow value; refractory plastic is kneaded to 30% plasticity. Finished products (including refractory spray coating and ramming mass) undergo tests for initial setting time and compressive strength.
Under ISO 9001, we monitor raw material entry, batching, and finished goods. Each batch is checked for refractoriness (1500–1800℃) and thermal shock resistance, with test reports and process records provided—ensuring consistency you can trust.
Steel plants struggle with converter and ladle linings: shaped bricks leave gaps at irregular furnace throats or pipe joints, causing heat loss and shortening equipment life. Highland’s monolithic refractory solves this refractory castable pours on-site to perfectly fit curved ladle walls, while refractory plastic molds by hand to seal furnace door corners, eliminating seams. Unlike shaped bricks (10–15% cutting waste), our products adapt with zero loss, reducing heat leakage by 5–8%. This tight fit stabilizes high-temperature zones, making steelmaking equipment run longer with fewer breakdowns.
Metallurgical facilities face frequent failures: blast furnace tapholes and non-ferrous smelting furnaces, under 1650–1750℃ heat, see traditional refractories wear out in 3–6 months due to slag scour. Highland’s refractory ramming mass (high-alumina) resists this with refractoriness ≥1750℃ and slag erosion ≤0.3cm/year, it’s 2–3x more durable than shaped bricks. Our refractory castable, reinforced with corundum, adds ≥80MPa cold strength, enduring constant molten metal impact. This extends taphole life to 1–1.5 years, cutting unplanned shutdowns.
Chemical plants waste 20–30% of equipment costs on reaction furnace maintenance: acid/alkali corrosion and temperature swings damage traditional brick linings, forcing full replacements. Highland’s solution? Corrosion-resistant refractory spray coating patches cracks in ≤2 hours (adhesion ≥1.5MPa, resisting most acids/alkalis). Paired with refractory castable linings, it extends service life to 3–5 years. This slashes maintenance costs by 40–50% and avoids production halts from frequent overhauls ideal for sustained chemical processing.
Ceramic tunnel kilns and shuttle kilns lose 30%+ of energy through brick joints, hiking costs and failing Environmental friendly standards. Highland’s monolithic refractory fixes this: seamless refractory castable linings have thermal conductivity ≤1.2W/(m・K), cutting heat loss by 8–10%. Made with low-sulfur aggregates, production meets ISO 14001, aligning with EU Environmental friendly rules. This reduces energy bills while ensuring compliance, making your ceramic production more sustainable and cost-effective.
High Alumina Castable refers to a refractory castable with Al2O3 content greater than 48%.
Corundum mullite castable is a high-quality high-performance refractory material with high thermal conductivity, insulation, good chemical stability and resistance to reducing agents.
Chrome corundum castable is a high-performance amorphous refractory material composed of corundum and chromium. It has high melting point, high hardness, high stability and excellent slag resistance and wear resistance.
Coating resistant silicon carbide castable is a high-performance refractory designed to operate at temperatures up to 1400–1600°C. It prevents material build-up by reducing adhesion and abrasion, making it ideal for cement kiln preheaters, riser ducts, calciners, and kiln inlet zones.
