Method for evaluating thermal plasticity of coals and caking additives, and method for producing coke

Patent metadata

Field	Value
Publication number	US-9340740-B2
Application number	US-201113820292-A
Country	US
Kind code	B2
Filing date	Aug 31, 2011
Priority date	Sep 1, 2010
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A method for evaluating thermal plasticity of coals and caking additives includes packing a coal or a caking additive into a vessel to prepare a sample 1 ; arranging a through-hole material 2 having through-holes from top to bottom surfaces, onto the sample 1 ; heating the sample 1 at a predetermined heating rate while maintaining a constant volume of or while applying a constant load onto the sample 1 and the through-hole material 2 ; measuring the permeation distance with which the molten sample has permeated into the through-holes; and evaluating thermal plasticity of the sample using the measured value. Alternatively, a method involves heating the sample 1 at a predetermined heating rate while maintaining the sample 1 and the through-hole material 2 in a constant volume; measuring the pressure of the sample that is transmitted via the through-hole material 2 ; and evaluating thermal plasticity of the sample using the measured value.

First claim

The invention claimed is:

1. A method for evaluating thermal plasticity of coals and caking additives, comprising:
packing a coal or a caking additive into a vessel to prepare a sample,
arranging a through-hole material having through-holes from top to bottom surfaces, onto the sample,
heating the sample while maintaining the sample and the through-hole material in a constant volume,
measuring the permeation distance with which the molten sample has permeated into the through-holes, and
evaluating thermal plasticity of the sample using the measured value.

2. A method for evaluating thermal plasticity of coals and caking additives, comprising:
packing a coal or a caking additive into a vessel to prepare a sample,
arranging a through-hole material having through-holes from top to bottom surfaces, onto the sample,
heating the sample while maintaining the sample and the through-hole material in a constant volume,
measuring the pressure of the sample that is transmitted via the through-hole material, and
evaluating thermal plasticity of the sample using the measured value.

3. A method for evaluating thermal plasticity of coals and caking additives, comprising:
packing a coal or a caking additive into a vessel to prepare a sample,
arranging a through-hole material having through-holes from top to bottom surfaces, onto the sample,
heating the sample while applying a constant load onto the through-hole material,
measuring the permeation distance with which the molten sample has permeated into the through-holes, and
evaluating thermal plasticity of the sample using the measured value.

4. A method for evaluating thermal plasticity of coals and caking additives, comprising:
packing a coal or a caking additive into a vessel to prepare a sample,
arranging a through-hole material having through-holes from top to bottom surfaces, onto the sample,
heating the sample while applying a constant load onto the through-hole material,
measuring the swelling coefficient of the sample, and
evaluating thermal plasticity of the sample using the measured value.

5. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein the preparation of the sample includes crushing a coal or a caking additive such that particles with a particle diameter of not more than 3 mm account for not less than 70 mass %, and packing the crushed coal or caking additive into a vessel with a packing density of 0.7 to 0.9 g/cm 3 and a layer thickness of 5 to 20 mm.

6. The method for evaluating thermal plasticity of coals and caking additives described in claim 5 , wherein the coal or the caking additive is crushed such that particles with a particle diameter of not more than 2 mm account for 100 mass %.

7. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein the through-hole material is a spherical particle-packed layer or a non-spherical particle-packed layer.

8. The method for evaluating thermal plasticity of coals and caking additives described in claim 7 , wherein the through-hole material is a spherical particle-packed layer.

9. The method for evaluating thermal plasticity of coals and caking additives described in claim 8 , wherein the spherical particle-packed layer include glass beads.

10. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein the sample is heated from room temperature to 550° C. at a heating rate of 2 to 10° C./min in an inert gas atmosphere.

11. The method for evaluating thermal plasticity of coals and caking additives described in claim 10 , wherein the heating rate is 2 to 4° C./min.

12. The method for evaluating thermal plasticity of coals and caking additives described in claim 3 , wherein the application of a constant load includes applying such a load that the pressure to the top surface of the through-hole material becomes 5 to 80 kPa.

13. The method for evaluating thermal plasticity of coals and caking additives described in claim 12 , wherein the application of a load includes applying such a load that the pressure to the top surface of the through-hole material becomes 15 to 55 kPa.

14. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein
arranging of the through-hole material includes arranging glass beads having a diameter of 0.2 to 3.5 mm onto the sample so as to obtain a layer thickness of 20 to 100 mm, and
heating of the sample includes heating the sample from room temperature to 550° C. at a heating rate of 2 to 10° C./min in an inert gas atmosphere while maintaining the sample and the glass bead layer in a constant volume.

15. The method for evaluating thermal plasticity of coals and caking additives described in claim 3 , wherein
arranging of the through-hole material includes arranging glass beads having a diameter of 0.2 to 3.5 mm onto the sample so as to obtain a layer thickness of 20 to 100 mm, and
heating of the sample includes heating the sample from room temperature to 550° C. at a heating rate of 2 to 10° C./min in an inert gas atmosphere while applying a load from above the glass beads such that 5 to 80 kPa is obtained.

16. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein
the preparation of the sample includes crushing a coal or a caking additive such that particles with a particle diameter of not more than 3 mm account for not less than 70 mass %, and packing the crushed coal or caking additive into a vessel with a packing density of 0.7 to 0.9 g/cm 3 and a layer thickness of 5 to 20 mm,
arranging of the through-hole material includes arranging glass beads having a diameter of 0.2 to 3.5 mm onto the sample so as to obtain a layer thickness of 20 to 100 mm, and
heating of the sample includes heating the sample from room temperature to 550° C. at a heating rate of 2 to 10° C./min in an inert gas atmosphere while maintaining the sample and the glass bead layer in a constant volume.

17. The method for evaluating thermal plasticity of coals and caking additives described in claim 3 , wherein
the preparation of the sample includes crushing a coal or a caking additive such that particles with a particle diameter of not more than 3 mm account for not less than 70 mass %, and packing the crushed coal or caking additive into a vessel with a packing density of 0.7 to 0.9 g/cm 3 and a layer thickness of 5 to 20 mm,
arranging of the through-hole material includes arranging glass beads having a diameter of 0.2 to 3.5 mm onto the sample so as to obtain a layer thickness of 20 to 100 mm, and
heating of the sample includes heating the sample from room temperature to 550° C. at a heating rate of 2 to 10° C./min in an inert gas atmosphere while applying a load from above the glass beads such that 5 to 80 kPa is obtained.

18. The method for evaluating thermal plasticity of coals and caking additives described in claim 1 , wherein
the preparation of the sample includes crushing a coal or a caking additive such that particles with a particle diameter of not more than 2 mm account for 100 mass %, and packing the crushed coal or caking additive into a vessel with a packing density of 0.8 g/cm 3 and a layer thickness of 10 mm,
arranging of the through-hole material includes arranging glass beads having a diameter of 2 mm onto the sample so as to obtain a layer thickness of 80 mm, and
heating of the sample includes heating the sample from room temperature to 550° C. at a heating ra

Assignees

• Dohi Yusuke
• Shimoyama Izumi
• Fukada Kiyoshi
• Yamamoto Tetsuya
• Sumi Hiroyuki
• Jfe Steel Corp

Inventors

• Dohi Yusuke
• Shimoyama Izumi
• Fukada Kiyoshi
• Yamamoto Tetsuya
• Sumi Hiroyuki

Classifications

• C10B45/00 Primary

  Other details · CPC title

• C10L5/28 Primary

  Heating the {shaped fuels, e.g.} briquettes; Coking the binders · CPC title

• G01N13/04

  Investigating osmotic effects · CPC title

• C10B57/06

  containing additives · CPC title

• G01N3/54

  Performing tests at high or low temperatures · CPC title