Scrap melting in anode furnace processes
US-2018100216-A1 · Apr 12, 2018 · US
Lance nozzle
US2022154299A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022154299-A1 |
| Application number | US-202017601481-A |
| Country | US |
| Kind code | A1 |
| Filing date | Apr 2, 2020 |
| Priority date | Apr 9, 2019 |
| Publication date | May 19, 2022 |
| Grant date | — |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowing lance to the molten iron. One or more blowing holes for blowing a working gas are on an inner wall side surface of the nozzle, at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site.
First claim
Opening claim text (preview).
1 . A lance nozzle configured to blow refining oxygen to molten iron charged in a reaction vessel by blowing a gas from a top-blowing lance to the molten iron, wherein one or more blowing holes for blowing a working gas are provided on an inner wall side surface of the nozzle at a site where the lance nozzle has a minimum cross-sectional area in a nozzle axis direction or at a neighboring site of the site. 2 . The lance nozzle according to claim 1 , wherein the blowing hole has a ratio of a hole height to a hole lateral width of not less than 0.15 and not more than 1.0. 3 . The lance nozzle according to claim 1 , wherein in the neighboring site of the site where the nozzle has a minimum cross-sectional area in the nozzle axis direction, the nozzle has a cross-sectional area in the nozzle axis direction not more than 1.1 times the minimum cross-sectional area in the nozzle axis direction. 4 . The lance nozzle according to claim 1 , wherein respective centers of the blowing holes lie on a common plane perpendicular to a center axis of the nozzle. 5 . The lance nozzle according to claim 1 , wherein two or more blowing holes identical in shape and opening area are arranged at an equal distance from each other. 6 . The lance nozzle according to claim 1 , wherein a total of hole lateral widths of respective openings of the blowing holes is not less than 25% and not more than 75% of a circumference of the nozzle. 7 . The lance nozzle according to claim 1 , wherein no steeply enlarged part is provided in a vicinity of each of openings of the blowing holes. 8 . The lance nozzle according to claim 2 , wherein in the neighboring site of the site where the nozzle has a minimum cross-sectional area in the nozzle axis direction, the nozzle has a cross-sectional area in the nozzle axis direction not more than 1.1 times the minimum cross-sectional area in the nozzle axis direction. 9 . The lance nozzle according to claim 2 , wherein respective centers of the blowing holes lie on a common plane perpendicular to a center axis of the nozzle. 10 . The lance nozzle according to claim 3 , wherein respective centers of the blowing holes lie on a common plane perpendicular to a center axis of the nozzle. 11 . The lance nozzle according to claim 4 , wherein respective centers of the blowing holes lie on a common plane perpendicular to a center axis of the nozzle. 12 . The lance nozzle according to claim 2 , wherein two or more blowing holes identical in shape and opening area are arranged at an equal distance from each other. 13 . The lance nozzle according to claim 3 , wherein two or more blowing holes identical in shape and opening area are arranged at an equal distance from each other. 14 . The lance nozzle according to claim 4 , wherein two or more blowing holes identical in shape and opening area are arranged at an equal distance from each other. 15 . The lance nozzle according to claim 2 , wherein a total of hole lateral widths of respective openings of the blowing holes is not less than 25% and not more than 75% of a circumference of the nozzle. 16 . The lance nozzle according to claim 3 , wherein a total of hole lateral widths of respective openings of the blowing holes is not less than 25% and not more than 75% of a circumference of the nozzle. 17 . The lance nozzle according to claim 4 , wherein a total of hole lateral widths of respective openings of the blowing holes is not less than 25% and not more than 75% of a circumference of the nozzle. 18 . The lance nozzle according to claim 2 , wherein no steeply enlarged part is provided in a vicinity of each of openings of the blowing holes. 19 . The lance nozzle according to claim 3 , wherein no steeply enlarged part is provided in a vicinity of each of openings of the blowing holes. 20 . The lance nozzle according to claim 4 , wherein no steeply enlarged part is provided in a vicinity of each of openings of the blowing holes.
Assignees
Inventors
Classifications
- C21C5/4606Primary
Lances or injectors · CPC title
Introducing a fluid jet or current into the charge (F27D3/18 takes precedence) · CPC title
through a lance · CPC title
Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence) · CPC title
Blowing from above (C21C5/35 takes precedence) · CPC title
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Frequently asked questions
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- What does patent US2022154299A1 cover?
- A top-blowing lance nozzle is configured to freely switch an adequate expansion condition so as to control an oxygen-blowing amount and a jetting velocity independently of each other without requiring a plurality of lance nozzles or a mechanically movable part. A lance nozzle is configured to blow refining oxygen to molten iron charged in a reaction vessel while a gas is blown from a top-blowin…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C21C5/4606. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu May 19 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).