Zirconium Sizing Nozzle

Application Industry: Refractories for Steel Industry

Application Equipment: Continuous Casting Machine Molten Steel Flow Rate Control

Size: Custom zirconium sizing nozzle geometry per continuous casting machine design (free engineering on request)

Consultation：

Products Overview

Our Zirconium Sizing Nozzle is a high-performance refractory product engineered for continuous casting machine molten steel flow rate control. According to customers’ needs, we can provide mosaic zirconium sizing nozzle, quick exchangeable sizing nozzle, and gas purging sizing nozzle. The product family features regular appearance, high concentricity, good thermal shock stability, no explosion, good erosion resistance, abrasion resistance, small expansion rate, and long continuous casting time for high quality continuous casting service.

The complete Zirconium Sizing Nozzle product family includes three product sub-systems: zirconium sizing nozzle (CH-DJX), zirconium core (CH-DJX), and outer coat (CH-DJW). The zirconium sizing nozzle sub-system offers thirteen engineering-proven DJX chemistry grades (X1 to X13) covering ZrO₂ content from 70% to 95% for matching different continuous casting steel grade flow rate requirements. The outer coat sub-system offers six DJW chemistry grades (W1 to W6) covering ZrO₂ content minimum 65%-75% with C content for matching different continuous casting service requirements. All products deliver excellent erosion resistance, thermal shock resistance, and stable flow rate control.

Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Zirconium Sizing Nozzle grade is engineered to ASTM, GB/T, and ISO refractory standards. The product quality indicators have reached the domestic advanced level. 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 zirconium dioxide raw materials with isostatic pressing and high temperature sintering process
Engineering-proven excellent thermal shock resistance, good erosion resistance, and stable flow rate control for continuous casting service
Complete product family including sizing nozzle, zirconium core, and outer coat for different continuous casting service zones
Thirteen DJX sizing nozzle grades covering ZrO₂ content 70%-95% for matching different continuous casting steel grade flow rate requirements
Mosaic, quick exchangeable, and gas purging sizing nozzle types available for different tundish service requirements

Product Specification

Zirconium sizing nozzle is engineered per buyer’s continuous casting machine design. Custom chemistry and geometry available on request. The product family is offered in 13 DJX chemistry grades (X1 to X13) covering ZrO₂ content 70%-95%.

Zirconium core

Brands Items	CH-DJX
Brands Items	X1	X2	X3	X4	X5	X6	X7	X8	X9	X11	X12	X13
ZrO₂ (%)	≥ 70	≥ 75	≥ 80	≥ 85	≥ 90	≥ 93	≥ 93	≥ 93	≥ 95	≥ 95	≥ 95	≥ 95
Bulk density (g/cm³)	≥ 3.8	≥ 3.9	≥ 4.0	≥ 4.1	≥ 4.3	≥ 4.5	≥ 4.7	≥ 4.9	≥ 5.1	≥ 5.2	≥ 5.5	≥ 5.5
Apparent porosity (%)	≤ 22	≤ 22	≤ 20	≤ 20	≤ 20	≤ 20	≤ 18	≤ 15	≤ 13	≤ 13	≤ 10	≤ 8
Thermal shock resistance (cycle, 1100 °C, water)	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5	≥ 5

Coat

Brands Items	CH-DJW
Brands Items	W1	W2	W3	W4	W5	W6
ZrO₂ (%)	≥ 65	≥ 65	≥ 70	≥ 70	≥ 75	≥ 75
C (%)	—	—	—	≥ 3	—	≥ 5
Bulk density (g/cm³)	≥ 2.3	≥ 2.6	≥ 2.6	≥ 2.7	≥ 2.7	≥ 2.85
Apparent porosity (%)	≤ 24	≤ 15	≤ 22	≤ 20	≤ 20	≤ 15

Note: Four performance parameters specified for Zirconium core: ZrO₂ content, Bulk Density, Apparent Porosity, and Thermal Shock Resistance. Four performance parameters specified for Coat: ZrO₂ content, C content, Bulk Density, and Apparent Porosity. 12 DJX chemistry grades (X1 to X13) engineered for continuous casting machine molten steel flow rate control service, covering ZrO₂ content 70%-95% for matching different continuous casting steel grade flow rate requirements. 6 DJW grades (W1 to W6) engineered for the coat portion. For project-specific chemistry and geometry, contact CH Refractories engineering.

Product Applications

Zirconium Sizing Nozzle is a high-performance refractory product manufactured from high-purity zirconium dioxide raw materials with isostatic pressing and high temperature sintering process, engineered for continuous casting machine molten steel flow rate control. According to customers’ needs, we can provide mosaic zirconium sizing nozzle, quick exchangeable sizing nozzle, and gas purging sizing nozzle. The product quality indicators have reached the domestic advanced level, with regular appearance, high concentricity, good thermal shock stability, no explosion, good erosion resistance, abrasion resistance, small expansion rate, and long continuous casting time.

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

Target Equipment: Continuous Casting Machine Molten Steel Flow Rate Control of small, medium-size, and large continuous casting machines in steelmaking operations.

Specific Application Zones: The complete Zirconium Sizing Nozzle product family includes three sub-systems: Zirconium Sizing Nozzle (CH-DJX X1-X13) for main sizing body, Zirconium Core (CH-DJX X1-X13) for inner core, and Outer Coat (CH-DJW W1-W6) for outer protection. The sizing nozzle sub-system delivers ZrO₂ content 70%-95% and Bulk Density minimum 3.8 to 5.5 g/cm³. The outer coat sub-system delivers ZrO₂ content 65%-75% and Bulk Density minimum 2.3 to 2.85 g/cm³. All products feature excellent thermal shock resistance and good erosion resistance for continuous casting service.

CH Refractories is a Zirconium Sizing Nozzle manufacturer in China, Henan, Zhengzhou. The complete Zirconium Sizing Nozzle 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 zirconium sizing nozzle and what are the main applications?

A1: Zirconium Sizing Nozzle is a high-performance refractory product engineered for continuous casting machine molten steel flow rate control. The complete product family includes three sub-systems: Zirconium Sizing Nozzle, Zirconium Core, and Outer Coat. According to customers' needs, we can provide mosaic zirconium sizing nozzle, quick exchangeable sizing nozzle, and gas purging sizing nozzle. The product quality indicators have reached the domestic advanced level, with regular appearance, high concentricity, good thermal shock stability, no explosion, good erosion resistance, abrasion resistance, small expansion rate, and long continuous casting time for high quality continuous casting service.

Q2: How many chemistry grades of zirconium sizing nozzle does CH Refractories offer?

A2: CH Refractories offers 19 engineering-proven DJX and DJW chemistry grades of Zirconium Sizing Nozzle for three sub-systems. The Zirconium Sizing Nozzle and Zirconium Core sub-systems use 13 DJX chemistry grades (X1 to X13) covering ZrO₂ content from 70% to 95% for matching different continuous casting steel grade flow rate requirements. The Outer Coat sub-system uses 6 DJW chemistry grades (W1 to W6) covering ZrO₂ content minimum 65%-75% with C content for matching different continuous casting service requirements. Lower ZrO₂ content grades (70%-85%) are the standard variants. Mid-range grades (90%-93%) are the higher-quality variants. Higher ZrO₂ content grades (95%) are the highest-quality variants.

Q3: What are the test conditions for zirconium sizing nozzle?

A3: Zirconium Sizing Nozzle delivers Bulk Density minimum 3.8 to 5.5 g/cm³ for sizing nozzle and core sub-systems depending on grade, and minimum 2.3 to 2.85 g/cm³ for outer coat sub-system depending on grade. Apparent Porosity reaches maximum 8% to 22% for sizing nozzle and core sub-systems, and maximum 15% to 24% for outer coat sub-system depending on grade. Thermal Shock Resistance is minimum 5 cycles at 1100 °C water quenching condition for all sizing nozzle and core grades. Cold Crushing Strength and Modulus of Rupture vary depending on grade. The product family features regular appearance, high concentricity, good thermal shock stability, no explosion, good erosion resistance, abrasion resistance, small expansion rate, and long continuous casting time for continuous casting service.

Q4: Can the zirconium sizing nozzle be customized to specific continuous casting machine designs?

A4: Yes. CH Refractories offers custom chemistry, geometry, and grade optimization against the buyer's specific continuous casting machine design and steel grade flow rate requirements. CH Refractories engineers can adjust ZrO₂ content, C content, raw material formulation, sintering process, and isostatic pressing to meet specific flow rate and continuous casting conditions for all three sub-systems (sizing nozzle, zirconium core, and outer coat). Please send the continuous casting machine drawing, sizing nozzle design, casting capacity, and steel grade data to our engineering team in Xinmi City, Zhengzhou, Henan, China for a free consultation, on-site technical support, and a tailored zirconium sizing nozzle formulation proposal with optimized grade selection, raw material adjustment, and geometry design for your specific continuous casting service conditions.