Monoblock-stopper
Application Industry: Refractories for Steel Industry
Application Equipment: Continuous Casting Machine Ladle Steel Flow Control
Size: Custom monoblock-stopper geometry per continuous casting machine design (free engineering on request)
Products Overview
Our Monoblock-stopper is a high-performance refractory product engineered for continuous casting machine ladle steel flow control. CH Refractories can design and produce argon purging and non-purging mono-stoppers as per the conditions of continuous casting processes in steel mills. The nose of mono-stopper can be Al2O3-C, MgO-C, Spinel-C, or ZrO2-C based according to the types of steel to cast. The body and slag zone of mono-stopper are Al2O3-C based. The mono-stoppers from CH Refractories can provide stable control of molten steel casting, good corrosion resistance, desired thermal shock resistance, and high temperature strength.
The Monoblock-stopper product family is offered in four engineering-proven SLT, SMT, SZT, and SMAT chemistry grades with two part systems (Nose and Body). The CH-SLT grade (Al2O3-C based) is the standard variant with Al2O3 content minimum 50%-72% for general continuous casting service. The CH-SMT grade (MgO-C based) is the magnesia variant with MgO content minimum 65% for demanding continuous casting service. The CH-SZT grade (ZrO2-C based) is the zirconia variant with ZrO2 content minimum 50%-60% for highest demand continuous casting service. The CH-SMAT grade (Spinel-C based) is the spinel variant with MgO content minimum 10% for special steel grade continuous casting service. All four grades deliver Bulk Density minimum 2.45 to 3.40 g/cm³, Apparent Porosity maximum 17% to 18%, Cold Crushing Strength minimum 20 to 25 MPa, Modulus of Rupture minimum 5 to 8 MPa, and Thermal Shock Resistance minimum 5 cycles.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Monoblock-stopper grade is engineered to ASTM, GB/T, and ISO refractory standards. The mono-stoppers from CH Refractories can last more than 35 hours used for billet caster and more than 20 hours for slab caster, suitable for almost all steel casting from normal carbon steel, low carbon steel, ultra-low carbon steel, high Mn steel to high O steel. For an overview of the broader catalogue, see the Refractories for the Steel Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from Al2O3-C, MgO-C, ZrO2-C, and Spinel-C based formulations with high-purity raw materials and phenolic resin binder
- Engineering-proven stable molten steel flow control, good corrosion resistance, and thermal shock resistance for continuous casting service
- Argon purging and non-purging types available for different continuous casting process requirements in steel mills
- Nose can be Al2O3-C, MgO-C, Spinel-C, or ZrO2-C based according to steel grade; body and slag zone are Al2O3-C based
- Four SLT, SMT, SZT, and SMAT chemistry grades for matching different billet, slab, and bloom continuous casting service
Product Specification
Monoblock-stopper is engineered per buyer’s continuous casting machine design. Custom chemistry and geometry available on request.
| Brands | CH-SLT | CH-SMT | CH-SZT | CH-SMAT | ||||
|---|---|---|---|---|---|---|---|---|
| Items | Al2O3-C | MgO-C | ZrO2-C | Spinel-C | ||||
| Part | Nose | Body | Nose | Body | Nose | Body | Nose | Body |
| Al2O3 (%) | ≥ 72 | ≥ 50 | – | ≥ 50 | – | – | ≥ 55 | ≥ 50 |
| C+SiC (%) | ≥ 11 | ≥ 23 | ≥ 11 | ≥ 23 | ≥ 12 | ≥ 20 | ≥ 11 | ≥ 23 |
| ZrO2 (%) | – | – | – | – | ≥ 60 | ≥ 50 | – | – |
| MgO (%) | – | – | ≥ 65 | – | – | – | ≥ 10 | – |
| Bulk density (g/cm³) | ≥ 2.80 | ≥ 2.45 | ≥ 2.65 | ≥ 2.45 | ≥ 3.40 | ≥ 3.40 | ≥ 2.70 | ≥ 2.45 |
| Apparent porosity (%) | ≤ 17 | ≤ 17 | ≤ 17 | ≤ 18 | ≤ 17 | ≤ 17 | ≤ 17 | ≤ 17 |
| Cold crushing strength (MPa) | ≥ 25 | ≥ 22 | ≥ 20 | ≥ 20 | ≥ 20 | ≥ 22 | ≥ 25 | ≥ 22 |
| Modulus of rupture (MPa) | ≥ 8 | ≥ 7 | ≥ 5 | ≥ 7 | ≥ 5 | ≥ 7 | ≥ 7 | ≥ 7 |
| Thermal shock resistance (cycle) | ≥ 5 | ≥ 5 | ≥ 5 | ≥ 5 | ||||
Note: Eight performance parameters specified per PDF source: Al2O3 content, C+SiC content, ZrO2 content, MgO content, Bulk Density, Apparent Porosity, Cold Crushing Strength, Modulus of Rupture, and Thermal Shock Resistance. Four SLT, SMT, SZT, and SMAT chemistry grades engineered for continuous casting machine ladle steel flow control service in four material systems: Al2O3-C, MgO-C, ZrO2-C, and Spinel-C. Each grade is engineered for two parts: nose and body. For project-specific chemistry and geometry, contact CH Refractories engineering.
Product Applications
Monoblock-stopper is a high-performance refractory product manufactured from Al2O3-C, MgO-C, ZrO2-C, and Spinel-C based formulations with high-purity raw materials and phenolic resin binder, engineered for continuous casting machine ladle steel flow control. The product family is available in argon purging and non-purging types as per the conditions of continuous casting processes in steel mills. The nose of mono-stopper can be Al2O3-C, MgO-C, Spinel-C, or ZrO2-C based according to the types of steel to cast. The body and slag zone of mono-stopper are Al2O3-C based. The mono-stoppers from CH Refractories can provide stable control of molten steel casting, good corrosion resistance, desired thermal shock resistance, and high temperature strength.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Continuous Casting Machine Ladle Steel Flow Control of small, medium-size, and large continuous casting machines in steelmaking operations.
Specific Application Zones: The CH-SLT grade (Al2O3-C based, Al2O3 content minimum 50%-72%) is the standard variant for general continuous casting service. The CH-SMT grade (MgO-C based, MgO content minimum 65%) is the magnesia variant for demanding continuous casting service. The CH-SZT grade (ZrO2-C based, ZrO2 content minimum 50%-60%) is the zirconia variant for highest demand continuous casting service. The CH-SMAT grade (Spinel-C based, MgO content minimum 10%) is the spinel variant for special steel grade continuous casting service. All four grades deliver Bulk Density minimum 2.45 to 3.40 g/cm³, Apparent Porosity maximum 17% to 18%, Cold Crushing Strength minimum 20 to 25 MPa, Modulus of Rupture minimum 5 to 8 MPa, and Thermal Shock Resistance minimum 5 cycles. The product family can last more than 35 hours for billet caster and more than 20 hours for slab caster.
CH Refractories is a Monoblock-stopper manufacturer in China, Henan, Zhengzhou. The complete Monoblock-stopper product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Refractories for the Steel Industry customers across the global iron and steel value chain.
