Long life quartz submerged nozzle

Our quartz and quartz protection tube nozzle brick production and management strictly enforce the Ministry of Metallurgy ministerial standards (YB4076-91), the technical indicators fully met or exceeded the ministerial standard. My company's products in actual use in each steel mill, each nozzle service life: 4-6 hours carbon steel; low-alloy steel is about 2 hours; quartz protection tube for 4-8 hours (depending on different types of steel are different). Mainly due to higher product quality, technology and equipment and there is a significant difference between the domestic industry. Our biggest advantage is that, with the national first-class experts and managers quartz product quality ranks first in domestic counterparts. Product description: Thermal conductivity: 0.5 (℃) refractory temperature: 1730 (℃) Compressive strength: 40 (Mpa) Specifications: 100-2000 (mm) thermal coefficient (20 ℃): 0.5 (kcal / m · h · ° ℃ ) Fire Temperature: 1700 (℃) Compressive strength:> 40 (Mpa) Specifications: Length 100 --- 2200 (mm) physical properties of the bulk density (g / cm3) ≥1.90 Apparent porosity (%) ≤12 normal pressure Strength (Mpa) ≥55 room temperature flexural strength (Mpa) ≥25 thermal conductivity (W / mk) 0.8 Thermal expansion coefficient (℃ -1) ≤0.9 × 10-6 crystallinity (vol%) ≤1 maximum use temperature (℃) 1600