Process for Dephosphorization of Molten Metal During a Refining Process
US-2017349959-A1 · Dec 7, 2017 · US
Process for manufacturing a slag conditioning agent for steel desulfurization
US12378619B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12378619-B2 |
| Application number | US-202418435044-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 7, 2024 |
| Priority date | Dec 17, 2018 |
| Publication date | Aug 5, 2025 |
| Grant date | Aug 5, 2025 |
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- Title
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Abstract
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A slag conditioning agent for steel desulfurization is shown which is made by a process in which a dried slag material obtained from a secondary steelmaking process is mixed with quicklime particles. The quicklime particles react with moisture in the slag material to dry the slag material and produce a blend of slag material, hydrated lime and any unreacted quicklime. The blend is then sieved to separate out the hydrated lime. The retained dried fraction after sieving is then mixed with an Al 2 O 3 mass fraction from which the slag conditioning agent can be collected. The slag conditioning agent has an equivalent mass ratio which is between 0.55 and 1.5.
First claim
Opening claim text (preview).
The invention claimed is: 1. A slag conditioning agent for a process of steel desulfurization, comprising phases of calcium aluminate and an equivalent mass ratio CaO/Al 2 O 3 comprised between 0.55 and 1.5, said slag conditioning agent having an iron content measured by XRF and expressed in equivalent Fe 2 O 3 of at least 3 wt %, an aluminum content expressed in equivalent Al 2 O 3 of at least 30 wt %, and an amount of calcium ferrites measured by XRD of at least 1 wt % relative to the weight of the slag conditioning agent. 2. The slag conditioning agent according to claim 1 , comprising an amount of calcium ferrites measured by XRD of at least 2 wt % relative to the weight of the slag conditioning agent. 3. The slag conditioning agent according to claim 1 , having a particle size distribution comprised between a minimum value and a maximum value, said minimum value being of at least 1 mm. 4. The slag conditioning agent according to claim 1 , having a particle size distribution comprised between a minimum value and a maximum value, said maximum value being of maximum 20 mm.
Assignees
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Classifications
Recycling · CPC title
Processes yielding slags of special composition · CPC title
Processes yielding slags of special composition · CPC title
Agents used for dephosphorising or desulfurising · CPC title
with the permanent addition of cooled slag or other solids · CPC title
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- What does patent US12378619B2 cover?
- A slag conditioning agent for steel desulfurization is shown which is made by a process in which a dried slag material obtained from a secondary steelmaking process is mixed with quicklime particles. The quicklime particles react with moisture in the slag material to dry the slag material and produce a blend of slag material, hydrated lime and any unreacted quicklime. The blend is then sieved t…
- Who is the assignee on this patent?
- Lhoist Rech Et Developpement Sa
- What technology area does this patent fall under?
- Primary CPC classification C21C7/0645. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Aug 05 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).