Method for evaluating coal, method for preparing coal blend, and method for producing coke
US-12061140-B2 · Aug 13, 2024 · US
Method for preparing coal or caking additive and method for producing coke
US12565619B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12565619-B2 |
| Application number | US-202118020461-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 5, 2021 |
| Priority date | Aug 17, 2020 |
| Publication date | Mar 3, 2026 |
| Grant date | Mar 3, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method for preparing a coal, which is used alone or in combination with at least one other coal, or a caking additive as a raw material for coke production. The method includes, before the coal or caking additive is delivered to a coke plant, adjusting a grain size such that the amount of grains with a grain size of 6 mm or more in the coal or caking additive satisfies at least one of a degree of entanglement (a−b)/a of 0.20 or more and a portion having a height a of 30 mm or more is 30% or less by mass. The height a is a height of semicoke adhering to a stirrer, the semicoke formed by heating the coal or caking additive in a container while rotating the stirrer, and the height b is a height of the semicoke on an inner wall of the container.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A method for preparing a coal, or a caking additive as a raw material for coke production, the method comprising: before the coal or the caking additive is delivered to a coke plant, adjusting a grain size of the coal or caking additive such that a portion of grains with a grain size of 6 mm or more in the coal or the caking additive has at least one of (i) a degree of entanglement (a−b)/a of 0.20 or more, and (ii) a portion having a height a of 30 mm or more is 30% or less by mass, heating and stirring the coal or caking additive in a container to form a semicoke, wherein the height a is a height of the semicoke adhering to a stirrer, and a height b is a height of the semicoke on an inner wall of the container. 2 . A method for preparing a coal or a caking additive as a raw material for coke production, the method comprising: before the coal or the caking additive is delivered to a coke plant, adjusting a grain size of the coal or caking additive such that a portion of grains with a grain size of 6 mm or more in the coal or caking additive has at least one of (i) a degree of entanglement (a−b)/a of 0.20 or more, and (ii) a portion having a height a of 30 mm or more, which satisfies a formula (1): amount of grains with a grain size of 6 mm or more (% by mass)≤30+0.5×(HGI−60) (1) wherein HGI denotes a Hardgrove grindability index of the coal or the caking additive in accordance with JIS M8801, and heating and stirring the coal or caking additive in a container to form a semicoke, wherein the height a is a height of a semicoke adhering to a stirrer, and a height b is a height of the semicoke on an inner wall of the container. 3 . The method for preparing a coal or a caking additive according to claim 1 , wherein the container and the stirrer are a Gieseler plastometer. 4 . The method for preparing a coal or a caking additive according to claim 1 , further comprising, before the coal or the caking additive is charged into a coke oven, adjusting the grain size such that the amount of grains with a grain size of 6 mm or more in the coal or the caking additive is 5% or less by mass. 5 . The method for preparing a coal or a caking additive according to claim 1 , further comprising, before the coal or the caking additive is delivered from a place where the coal or the caking additive is produced, adjusting the grain size of the coal or the caking additive. 6 . A method for producing coke, the method comprising carbonizing a coal prepared by the method for preparing a coal or a caking additive according to claim 1 . 7 . A method for producing coke, the method comprising carbonizing a coal and a caking additive prepared by the method for preparing a coal or a caking additive according to claim 1 . 8 . The method for preparing a coal or a caking additive according to claim 2 , wherein the container and the stirrer are a Gieseler plastometer. 9 . The method for preparing a coal or a caking additive according to claim 2 , further comprising, before the coal or the caking additive is charged into a coke oven, adjusting the grain size such that a portion of grains with a grain size of 6 mm or more in the coal or the caking additive is 5% or less by mass. 10 . The method for preparing a coal or a caking additive according to claim 2 , further comprising, before the coal or the caking additive is delivered from a place where the coal or the caking additive is produced, adjusting the grain size of the coal or the caking additive.
Assignees
Inventors
Classifications
- G01N33/222Primary
Solid fuels, e.g. coal · CPC title
by using rotary bodies, e.g. vane (G01N11/16 takes precedence) · CPC title
containing additives · CPC title
using charges of special composition · CPC title
Diluting, dispersing or mixing samples · CPC title
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Frequently asked questions
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- What does patent US12565619B2 cover?
- A method for preparing a coal, which is used alone or in combination with at least one other coal, or a caking additive as a raw material for coke production. The method includes, before the coal or caking additive is delivered to a coke plant, adjusting a grain size such that the amount of grains with a grain size of 6 mm or more in the coal or caking additive satisfies at least one of a degre…
- Who is the assignee on this patent?
- Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification G01N33/222. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 03 2026 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).