JPS5684409A - Preparation of sponge iron with high productivity - Google Patents
Preparation of sponge iron with high productivityInfo
- Publication number
- JPS5684409A JPS5684409A JP15981879A JP15981879A JPS5684409A JP S5684409 A JPS5684409 A JP S5684409A JP 15981879 A JP15981879 A JP 15981879A JP 15981879 A JP15981879 A JP 15981879A JP S5684409 A JPS5684409 A JP S5684409A
- Authority
- JP
- Japan
- Prior art keywords
- filled
- crude reduction
- oxide powder
- reducing agent
- iron oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Manufacture Of Iron (AREA)
Abstract
PURPOSE: To enhance the productivity of sponge iron produced by crude reduction process in a tunnel kiln by a method wherein carbonaceous material with a high and low gasification reactivity is arranged so that the former is placed in the inner and the latter in the outer side of an iron oxide powder layer.
CONSTITUTION: Iron oxide powder is cylindrically filled in a heat-resistant container, a reducing material to produce CO gas is filled in the inner and outer parts of the cylindrical iron oxide powder, and the container is heated from the outside so that sponge iron is produced by crude reduction. At this time, the inner side of the cylindrical iron oxide powder is filled with a reducing agent which accelerates CO gas generating reaction at a temperature below the crude reduction temperature, or with a filler containing such a reducing agent; the outer side is filled with a reducing agent which accelerates CO gas generating reaction at the crude reduction temperature, or a filler containing the same reducing agent. In this manner, prior to occurrence of the crude reduction reaction, CO gas is diffused in the container, thereby shortening the reaction time for crude reduction,.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15981879A JPS5684409A (en) | 1979-12-11 | 1979-12-11 | Preparation of sponge iron with high productivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15981879A JPS5684409A (en) | 1979-12-11 | 1979-12-11 | Preparation of sponge iron with high productivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5684409A true JPS5684409A (en) | 1981-07-09 |
| JPS5717043B2 JPS5717043B2 (en) | 1982-04-08 |
Family
ID=15701910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15981879A Granted JPS5684409A (en) | 1979-12-11 | 1979-12-11 | Preparation of sponge iron with high productivity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5684409A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110678280B (en) | 2017-05-18 | 2022-04-29 | 花王株式会社 | Iron powder for heat-generating composition, method for producing same, heat-generating composition using same, and method for producing heat-generating element |
| JP6472916B1 (en) * | 2017-12-25 | 2019-02-20 | 花王株式会社 | Method for producing iron powder for exothermic composition |
-
1979
- 1979-12-11 JP JP15981879A patent/JPS5684409A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717043B2 (en) | 1982-04-08 |
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