Refractory Coil Cement for Induction Furnace
Kerui refractory coil cement is a specialized bonding material for induction furnace coils. It offers strong adhesion, good insulation, and excellent thermal shock resistance to ensure stable and efficient furnace operation.
-
83-93
Al2O3 (%)
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2.6 – 3.0
Bulk Density (g/cm³)
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1580–1750
Service Temperature (℃)
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30–50+
Cold Crushing Strength (MPa)
What is Refractory Coil Cement?
Coil Cement (also known as Refractory Coil Cement or Induction Furnace Coil Cement) is a specialized monolithic refractory material designed to protect induction furnace coils from thermal and mechanical stresses. It serves as a protective layer between the coil and the working lining, enhancing the furnace’s operational efficiency and lifespan.
Kerui Technical Index of Refractory Coil Cement
| Item | KRCo-93 | KRCo-88 | KRCo-85 | KRCo-83 | Remarks / Reference |
|---|---|---|---|---|---|
| Al₂O₃ (%) | ≥93 | ≥88 | ≥85 | ≥83 | Main component, determines refractoriness |
| SiO₂ (%) | ≤2.0 | ≤5.0 | ≤6.0 | ≤6.5 | Low SiO₂ improves insulation & refractoriness |
| CaO (%) | ≤6.0 | ≤6.0 | ≤6.0 | ≤6.0 | Controlled for proper hydraulic setting |
| TiO₂ (%) | ≤2.0 | ≤2.0 | ≤2.0 | ≤3.0 | Trace element, affects high-temp strength |
| Fe₂O₃ (%) | ≤1.0 | ≤1.2 | ≤1.5 | ≤1.5 | Lower Fe₂O₃ improves corrosion resistance |
| Bulk Density (g/cm³) | ≥3.0 | ≥2.8 | ≥2.7 | ≥2.6 | Measured after installation and curing |
| Refractoriness (°C) | ≥1750 | ≥1700 | ≥1580 | ≥1580 | Maximum service temperature |
| Grain Size (mm) | ≤3.0 | ≤3.0 | ≤3.0 | ≤3.0 | Fine grain for smooth application |
| Initial Setting Time (h) | 1.0 – 2.0 | 1.0 – 2.0 | 1.0 – 2.0 | ≈1.5 | Adjusted for installation speed |
| Final Setting Time (h) | 3.0 – 5.0 | 3.0 – 5.0 | 3.0 – 5.0 | ≈4.0 | Full strength development |
| Cold Crushing Strength (MPa) | ≥50 | ≥40 | ≥35 | ≥30 | After drying at 110 °C |
| Modulus of Rupture (MPa) | ≥6.0 | ≥5.0 | ≥4.0 | ≥4.0 | Flexural strength, room temp |
| Water Addition | 5.0 – 6.5% | 5.0 – 7.0% | 5.0 – 7.5% | 6.0 – 8.0% | Follow product instructions |
How to Make Refractory Coil Cement?
The raw materials of refractory coil cement are mainly high-purity fused alumina, calcined alumina, and calcium aluminate cement. Kerui strictly inspects all incoming raw materials to ensure stable chemical composition and low impurity content. Qualified raw materials are stored in separate silos to avoid cross-contamination.
To ensure consistent quality, Kerui uses an automatic batching and weighing system for refractory coil cement production. This system accurately controls the proportion of alumina aggregates, binders, and additives such as microsilica or plasticizers. High-efficiency mixers guarantee that the final coil cement has uniform grain distribution and excellent flowability.
Kerui supports customized packaging solutions for refractory coil cement. We can supply products in moisture-proof bags, drums, or jumbo bags according to customer needs. In addition, each package is clearly labeled with model name (e.g., KR-Co-93, KR-Co-88) to avoid installation errors. Kerui’s logistics team ensures fast and safe delivery worldwide.
Advantages of Kerui Refractory Coil Cement
Kerui Refractory Coil Cement is supplied as a ready-to-use dry mix. By simply adding water according to the recommended ratio, you can achieve the right consistency for your project. It can be conveniently applied to coil surfaces by brushing, daubing, or spraying, ensuring a uniform coating and excellent coverage.
This product is specially formulated to bond firmly with coil surfaces and surrounding refractory materials. The strong adhesion minimizes gaps and ensures a secure fit, which helps maintain optimal coil efficiency and stable performance at high temperatures.
Kerui Refractory Coil Cement offers outstanding resistance to heat, slag, and chemical corrosion, making it ideal for electric arc furnaces, induction furnaces, and other coil-based heating systems. It protects coils from oxidation and erosion, extending their service life and reducing maintenance frequency.
With a low thermal expansion rate and excellent thermal shock resistance, this coil cement stays intact even under frequent heating and cooling cycles. This property helps prevent peeling, cracking, or detachment, ensuring consistent protection for your furnace coils.
Kerui Reasonable Price of Refractory Coil Cement
Kerui owns high-quality mineral resources and an advanced production base, which helps reduce production costs. This is why Kerui can offer reasonable refractory coil cement prices to global customers. As an experienced and trusted refractory coil cement supplier, Kerui is committed to delivering consistent quality at competitive prices. If you need a detailed price list or per-ton quotation of Kerui refractory coil cement, please feel free to contact us.
Professional Refractory Coil Cement Supplier – Kerui Refractory
Kerui strictly controls every step of coil cement production, starting with raw material selection. Only high-purity materials that meet exact technical specifications are used. Experienced technicians monitor batching, mixing, and packaging to guarantee stable performance and high bonding strength of coil cement.
Kerui holds multiple international certifications, including ISO 9001, ISO 14001, and ISO 45001. These certificates prove our commitment to quality management, environmental responsibility, and occupational health and safety, giving customers confidence in choosing Kerui coil cement.
From product selection to installation guidance, Kerui provides complete service and technical support for customers. Our professional team can recommend the right coil cement formulation for your furnace type and working conditions, ensuring optimal performance and long service life.
Kerui refractory coil cement has been successfully applied in induction furnaces, electric arc furnaces, and other coil-based heating systems in more than 30 countries. Positive customer feedback highlights our expertise, reliable quality, and excellent after-sales support.
Kerui refractory coil cement is trusted by customers around the world for many reasons – including its consistent quality, reliable bonding strength, and excellent resistance to thermal shock and slag attack. In addition, Kerui offers professional technical support and stable production capacity to ensure timely supply. If you need refractory coil cement for your induction furnace, feel free to contact Kerui Refractory and get a prompt reply within 12 hours.
