Rotary bed-type electric furnace
US-10746467-B2 · Aug 18, 2020 · US
Production of iron
US11959153B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11959153-B2 |
| Application number | US-202217903773-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 6, 2022 |
| Priority date | Oct 24, 2016 |
| Publication date | Apr 16, 2024 |
| Grant date | Apr 16, 2024 |
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- Title
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Abstract
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A process for direct reduction of iron ore in a solid state includes exposing briquettes of iron ore fragments and biomass to electromagnetic energy under anoxic conditions and generating heat within iron ore in the briquettes. The iron ore is reduced in a solid state within the briquettes, and the biomass provides a source of reductant.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for direct reduction of iron ore in a solid state includes exposing briquettes of iron ore fragments and biomass to electromagnetic energy in the microwave energy band of the electromagnetic energy spectrum under anoxic conditions and generating heat within iron ore in the briquettes, with iron ore being reduced in a solid state within the briquettes, and with biomass providing a source of reductant. 2. The process defined in claim 1 includes electromagnetic energy generating heat within the biomass. 3. The process defined in claim 1 includes controlling process operating conditions so that iron ore is heated to a temperature in a range at which there is metallization of iron ore. 4. The process defined in claim 3 includes, in the case of hematite, controlling process operating conditions so that iron ore is heated to a temperature in a range of 800-950° C. for metallization of the hematite. 5. The process defined in claim 1 includes operating as a continuous process that includes transporting briquettes of iron ore and biomass through a preheating chamber and preheating iron ore and biomass as briquettes move through the preheating chamber; and transporting preheated briquettes of iron ore and biomass through a heating/reduction chamber that has an anoxic environment and exposing iron ore and biomass to electromagnetic energy as briquettes move through the preheating chamber. 6. The process defined in claim 1 wherein the briquettes have a major dimension of 1-10 cm. 7. The process defined in claim 1 wherein the briquettes have a major dimension of 2-10 cm. 8. The process defined in claim 1 wherein the briquettes have a major dimension of 2-6 cm. 9. The process defined in claim 1 wherein the process is a batch process. 10. The process defined in claim 1 wherein the process is a continuous process.
Assignees
Inventors
Classifications
Microwave heating · CPC title
Recycling of non-gaseous waste material · CPC title
Electric heating elements or system · CPC title
Arrangements of controlling devices · CPC title
with electromagnetic fields acting directly on the material being heated · CPC title
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Frequently asked questions
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- What does patent US11959153B2 cover?
- A process for direct reduction of iron ore in a solid state includes exposing briquettes of iron ore fragments and biomass to electromagnetic energy under anoxic conditions and generating heat within iron ore in the briquettes. The iron ore is reduced in a solid state within the briquettes, and the biomass provides a source of reductant.
- Who is the assignee on this patent?
- Tech Resources Pty Ltd
- What technology area does this patent fall under?
- Primary CPC classification C21B13/12. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 16 2024 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).