Gunning Mixes for EAF (Electric Arc Furnace )
Application Industry: Refractories for Steel Industry
Application Equipment: Electric Arc Furnace (EAF) Cold and Hot Repair Lining at Slag Line and Side Wall
Size: Granular refractory gunning material (custom grain size and chemistry on request)
Products Overview
Our Gunning Mixes for EAF are refractory gunning products manufactured from electric-fused magnesia as the main raw material with composite binding additives, engineered for Electric Arc Furnace cold and hot repair lining service. The product family features high adhesive strength, low rebound rate, good sintering behavior, good erosion resistance, and is suitable as cold or hot repair material at EAF slag line and side wall positions.
The Gunning Mixes for EAF product family is offered in three engineering-proven CHDPB chemistry grades. The CHDPB-87 grade is the high-magnesia workhorse with magnesia content of 87 percent or higher and bulk density of 2.60 g/cm³ or higher. The CHDPB-75 grade is the mid-magnesia variant with magnesia content 75 percent or higher and CaO content 10 percent or lower. The CHDPB-65 grade is the high-CaO variant with magnesia content 65 percent or higher, CaO content 30 percent or lower, and bulk density of 2.30 g/cm³ or higher.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Gunning Mixes for EAF grade is engineered to ASTM, GB/T, and ISO refractory standards. 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 electric-fused magnesia as the main raw material with composite binding additives
- Engineering-proven high adhesive strength, low rebound rate, and good sintering characteristics in EAF gunning service
- Suitable as both cold repair and hot repair materials for EAF slag line and side wall lining
- Good erosion resistance and impact resistance under demanding EAF slag line and side wall conditions
- Three CHDPB chemistry grades covering magnesia content 65 to 87 percent for matching different EAF capacity zones
Product Specification
Granular gunning material is engineered per buyer’s EAF gunning-repair design and lining application. Custom chemistry and grain size optimization available on request.
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Brands
Items
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CHDPB-87 | CHDPB-75 | CHDPB-65 |
|---|---|---|---|
| MgO content (%) | ≥ 87 | ≥ 75 | ≥ 65 |
| CaO content (%) | — | ≤ 10 | ≤ 30 |
| Bulk Density (g/cm³) | ≥ 2.60 | ≥ 2.40 | ≥ 2.30 |
| Cold Crushing Strength (MPa) | ≥ 15 (110 °C, 24h) | ≥ 15 (110 °C, 24h) | ≥ 15 (110 °C, 24h) |
| ≥ 25 (1500 °C, 3h) | ≥ 20 (1500 °C, 3h) | ≥ 20 (1500 °C, 3h) | |
| Permanent Linear Change (%) | 0 ~ -1.5 (1500 °C, 3h) | 0 ~ -2.5 (1500 °C, 3h) | 0 ~ -3.0 (1500 °C, 3h) |
Note: Five performance parameters specified per PDF source: MgO content, CaO content, Bulk Density, Cold Crushing Strength, and Permanent Linear Change. Three CHDPB chemistry grades engineered for cold and hot repair gunning service at EAF slag line and side wall positions. For project-specific chemistry, contact CH Refractories engineering.
Product Applications
Gunning Mixes for EAF are refractory gunning products manufactured from electric-fused magnesia and composite binding additives, engineered for Electric Arc Furnace cold and hot repair service. The product family features high adhesive strength, low rebound rate, good sintering behavior, and good erosion resistance under demanding EAF slag line and side wall conditions.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Electric Arc Furnace (EAF) Slag Line and Side Wall Lining of small, medium-size, and large Electric Arc Furnaces.
Specific Application Zones: The CHDPB-87 grade (magnesia content 87 percent or higher) is the high-magnesia workhorse for demanding EAF slag line and side wall gunning service. The CHDPB-75 grade (magnesia content 75 percent or higher, CaO content 10 percent or lower) is the mid-magnesia variant for general EAF slag line and side wall lining service. The CHDPB-65 grade (magnesia content 65 percent or higher, CaO content 30 percent or lower) is the high-CaO variant for EAF cold and hot repair under varying slag chemistry conditions. Cold Crushing Strength reaches 15 MPa after 110 °C curing for 24 hours and 20 to 25 MPa after 1500 °C firing for 3 hours. Permanent Linear Change ranges from 0 to 1.5 percent (CHDPB-87) to -3.0 to 0 percent (CHDPB-65) at 1500 °C firing for 3 hours.
CH Refractories is a Gunning Mixes for EAF manufacturer in China, Henan, Zhengzhou. The complete Gunning Mixes for EAF 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.
