Magnesia carbon brick
US-2015353426-A1 · Dec 10, 2015 · US
Gas injection nozzle refractory and gas injection nozzle
US2022003500A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022003500-A1 |
| Application number | US-201917277149-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 19, 2019 |
| Priority date | Sep 21, 2018 |
| Publication date | Jan 6, 2022 |
| Grant date | — |
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Abstract
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A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO-C central refractory with a small metal tube buried therein, and a MgO-C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding all buried small metal tubes, R mm being a radius of the virtual circle.
First claim
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1 . A gas injection nozzle refractory with at least one gas injection small metal tube buried in a carbon-containing refractory, the gas injection nozzle comprising: a central refractory with the at least one small metal tube buried therein, the central refractory being a MgO-C refractory with a carbon content in the range of 40% to 80% by mass, a metal Al content in the range of 3% to 8% by mass, and a mass ratio of a metal Si content to the metal Al content in the range of 0.30 to 1.0, and a peripheral refractory surrounding the central refractory, the peripheral refractory being a MgO-C refractory with a carbon content in the range of 10% to 25% by mass, wherein the central refractory on a plane of the gas injection nozzle refractory has an external shape of a circle with a radius in the range of R+10 to R+150 mm concentric with a virtual circle with a minimum radius surrounding the at least one buried small metal tube, R mm being a radius of the virtual circle. 2 . The gas injection nozzle refractory according to claim 1 , wherein the external shape is a circle with a radius in the range of R+40 to R+70 mm concentric with the virtual circle. 3 . The gas injection nozzle refractory according to claim 1 , wherein the metal Al content is in the range of 5% to 7% by mass. 4 . The gas injection nozzle refractory according to claim 1 , wherein the metal Al content is in the range of 5% to 7% by mass, and the mass ratio of the metal Si content to the metal Al content is in the range of 0.30 to 0.45. 5 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 1 . 6 . The gas injection nozzle refractory according to claim 2 , wherein the metal Al content is in the range of 5% to 7% by mass. 7 . The gas injection nozzle refractory according to claim 2 , wherein the metal Al content is in the range of 5% to 7% by mass, and the mass ratio of the metal Si content to the metal Al content is in the range of 0.30 to 0.45. 8 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 2 . 9 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 3 . 10 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 4 . 11 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 6 . 12 . A gas injection nozzle comprising the gas injection nozzle refractory according to claim 7 .
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Classifications
Flakes, platelets or plates · CPC title
Bottoms or tuyéres of converters · CPC title
Graphite · CPC title
containing carbon (C04B35/103 takes precedence) · CPC title
- C21C5/34Primary
Blowing through the bath (C21C5/35 takes precedence) · CPC title
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- What does patent US2022003500A1 cover?
- A gas injection nozzle refractory with one or more gas injection small metal tubes buried therein has improved durability. The gas injection nozzle refractory includes a MgO-C central refractory with a small metal tube buried therein, and a MgO-C peripheral refractory surrounding the central refractory. The central refractory on a plane of the gas injection nozzle refractory has an external sha…
- Who is the assignee on this patent?
- Jfe Steel Corp, Shinagawa Refractories Co
- What technology area does this patent fall under?
- Primary CPC classification C21C5/34. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Jan 06 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).