연속주조용 침지노즐

용강이 턴디시에서 결정기로 유입될 때 용강이 산화되는 것을 방지합니다., 용강을 결정화기에 고르게 분배합니다., 결정화기 내 용강의 흐름 상태를 제어합니다., 슬래그 저항성이 우수함, 안티 블로킹, 긴 수명, 그리고 낮은 사고율.

침지 노즐의 물리적, 화학적 표시기

물리적 및 화학적 지표：

안건	색인
안건	JSK55	JSK50	JSK45	JSK40
알₂영형₃ %	≥55	≥50	≥45	≥40
씨 %	≥16	≥18	≥20	≥22
굴곡 강도 MPa	≥5.5	≥5.5	≥5.5	≥5
겉보기 다공성 %	≤19	≤19	≤19	≤19
벌크 밀도 g/cm³	≥2.36	≥2.32	≥2.28	≥2.18

슬래그 지역：

안건	색인
안건	Z75	Z70	Z65	Z55
ZrO₂ %	≥75	≥70	≥65	≥55
씨 %	≥9	≥12	≥15	≥18
겉보기 다공성 %	≤21	≤21	≤21	≤22
벌크 밀도 g/cm³	≥3.6	≥3.5	≥3.4	≥3.2

What conditions does the submerged nozzle need to meet?

1) Ensure the flow rate of molten steel at normal pulling speed.
(2) Make the heat flow distribution in the mold and the cross section of the ingot as uniform as possible;
(3) Facilitate the rapid melting of protective slag;
(4) Facilitate the floating of inclusions without slag rolling;
(5) Avoid violent turbulence of the steel liquid level in the crystallizer;
(6) Easy to install.

Selection of immersed nozzle material

In the early stage of continuous casting, the fused quartz immersion nozzle with good thermal stability and high purity can meet the casting of ordinary carbon steel, low manganese steel, aluminum killed steel and other steel types. 하지만, it is severely corroded under the conditions of high manganese steel and high alkalinity slag. 이때, the aluminum carbon immersion nozzle is widely used. The raw materials of aluminum carbon immersion nozzle are special grade bauxite, fused corundum or sintered corundum, 등., with the addition of graphite and antioxidants. The product has the advantages of corrosion resistance and thermal shock resistance.