Dry Ramming Mixes for EAF Bottom

Q: Q3: What are the testing conditions for dry ramming mixes for EAF bottom?

A3: Dry Ramming Mixes for EAF Bottom is tested at 1300 C for 3 hours and 1600 C for 3 hours for Cold Crushing Strength, achieving 10 MPa at 1300 C and 30 MPa at 1600 C depending on grade. Bulk Density is measured after 1600 C firing for 3 hours and reaches 2.40 to 2.45 g/cm or higher depending on grade. The product family achieves SiO2 content 1.5 percent or lower.

Application Industry: Refractories for Steel Industry

Application Equipment: Electric Arc Furnace (EAF) Bottom Lining

Size: Pre-mixed dry granular ramming material with 6 to 8 mm maximum grain size (custom formulation on request)

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Products Overview

Our Dry Ramming Mixes for EAF Bottom are granular refractory ramming products engineered for Electric Arc Furnace bottom lining service. The product family is manufactured from high-purity magnesite, premium Fe₂O₃-CaO magnesite, and additives based on particle dense packing principle, showing excellent resistance against steel penetration, superior erosion resistance, easily-sintering characteristics, high bulk density, and easy installation. The product is an ideal choice for HP and UHP Electric Arc Furnace bottom service.

The Dry Ramming Mixes for EAF Bottom product family is offered in three engineering-proven DLD chemistry grades. The CH-DLD85 grade is the high-magnesia workhorse with magnesia content 85 percent or higher. The CH-DLD80 grade is the mid-magnesia variant with magnesia content 80 percent or higher. The CH-DLD68 grade is the high-CaO variant with magnesia content 68 percent or higher and CaO content 18 to 25 percent. All three grades deliver SiO₂ content 1.5 percent or lower and bulk density of 2.40 to 2.45 g/cm³ or higher after 1600 °C firing for 3 hours.

Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Dry Ramming Mixes for EAF Bottom 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 high-purity magnesite, premium Fe₂O₃-CaO magnesite, and additives based on particle dense packing principle
Engineering-proven excellent resistance against steel penetration, superior erosion resistance, and easily-sintering characteristics
Easy installation, good sintering behavior, high integrity, and long service life for EAF bottom service
Ideal material for HP and UHP electric arc furnace bottom under demanding high-temperature conditions
Three DLD chemistry grades covering magnesia content 68 to 85 percent for matching different EAF bottom duty

Product Specification

Pre-mixed dry ramming material is engineered per buyer’s EAF bottom design. Custom chemistry and grain size optimization available on request.

Brands Items	CH-DLD85	CH-DLD80	CH-DLD68
MgO content (%)	≥ 85	≥ 80	≥ 68
CaO content (%)	6~8	6~9	18~25
Fe₂O₃ content (%)	4~5	5~9	3~5
SiO₂ content (%)	≤ 1.5	≤ 1.5	≤ 1.5
Cold Crushing Strength (MPa)	≥ 10 (1300 °C, 3h)	≥ 10 (1300 °C, 3h)	≥ 10 (1300 °C, 3h)
Cold Crushing Strength (MPa)	≥ 30 (1600 °C, 3h)	≥ 30 (1600 °C, 3h)	≥ 30 (1600 °C, 3h)
Bulk Density (g/cm³)	≥ 2.45 (1600 °C, 3h)	≥ 2.45 (1600 °C, 3h)	≥ 2.40 (1600 °C, 3h)

Note: Seven performance parameters specified: MgO content, CaO content, Fe₂O₃ content, SiO₂ content, Cold Crushing Strength, and Bulk Density. Three DLD chemistry grades engineered for HP/UHP EAF bottom service. For project-specific chemistry, contact CH Refractories engineering.

Product Applications

Dry Ramming Mixes for EAF Bottom are granular refractory ramming products manufactured from high-purity magnesite, premium Fe₂O₃-CaO magnesite, and additives based on particle dense packing principle. The product family shows excellent resistance against steel penetration, superior erosion resistance, easily-sintering characteristics, high bulk density, and easy installation. The product is an ideal choice for HP and UHP Electric Arc Furnace bottom service in steel and broader metallurgical industry.

Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.

Target Equipment: Electric Arc Furnace (EAF) Bottom Lining of small, medium-size, large, HP, and UHP Electric Arc Furnaces.

Specific Application Zones: The CH-DLD85 grade (magnesia content 85 percent or higher) is the high-magnesia workhorse for HP and UHP EAF bottom service requiring maximum erosion resistance. The CH-DLD80 grade (magnesia content 80 percent or higher) is the mid-magnesia variant for general HP/UHP EAF bottom service. The CH-DLD68 grade (magnesia content 68 percent or higher, CaO content 18 to 25 percent) is the high-CaO variant for EAF bottom service under varying slag chemistry conditions. All three grades deliver SiO₂ content 1.5 percent or lower, Cold Crushing Strength 10 MPa or higher at 1300 °C for 3 hours and 30 MPa or higher at 1600 °C for 3 hours, with Bulk Density 2.40 to 2.45 g/cm³ or higher after 1600 °C firing for 3 hours.

CH Refractories is a Dry Ramming Mixes for EAF Bottom manufacturer in China, Henan, Zhengzhou. The complete Dry Ramming Mixes for EAF Bottom 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.

Product FAQ

Q1: What is dry ramming mixes for EAF bottom and what are the main applications?

A1: Dry Ramming Mixes for EAF Bottom are granular refractory ramming products manufactured from high quality magnesite and Fe₂O₃-CaO magnesite, and show the features of excellent resistance against steel penetration, superior erosion resistance, easily-sintering, high bulk density, and easy installation. The product family is widely used as the ideal material for HP and UHP Electric Arc Furnace bottom service in steel and broader metallurgical industry.

Q2: How many chemistry grades of dry ramming mixes for EAF bottom does CH Refractories offer?

A2: CH Refractories offers three engineering-proven DLD chemistry grades of Dry Ramming Mixes for EAF Bottom. The CH-DLD85 grade has magnesia content 85 percent or higher for high-magnesia HP/UHP EAF bottom service. The CH-DLD80 grade has magnesia content 80 percent or higher for mid-magnesia EAF bottom service. The CH-DLD68 grade has magnesia content 68 percent or higher and CaO content 18 to 25 percent for high-CaO variant under varying slag chemistry conditions.

Q3: What are the testing conditions for dry ramming mixes for EAF bottom?

A3: Dry Ramming Mixes for EAF Bottom is tested at 1300 °C for 3 hours and 1600 °C for 3 hours for Cold Crushing Strength, achieving 10 MPa at 1300 °C and 30 MPa at 1600 °C depending on grade. Bulk Density is measured after 1600 °C firing for 3 hours and reaches 2.40 to 2.45 g/cm³ or higher depending on grade. The product family achieves SiO₂ content 1.5 percent or lower.

Q4: Can the dry ramming mixes for EAF bottom be customized to specific EAF bottom designs?

A4: Yes. CH Refractories offers custom chemistry and grain size optimization against the buyer's specific EAF capacity, bottom lining design, and operating conditions. Please send the EAF bottom drawing, capacity, and operating temperature data to our engineering team in Xinmi City, Zhengzhou, Henan, China for a free consultation, on-site technical support, and a tailored dry ramming mix formulation proposal.