GB922019A - Iron ore magnetic roast process - Google Patents
Iron ore magnetic roast processInfo
- Publication number
- GB922019A GB922019A GB38305/60A GB3830560A GB922019A GB 922019 A GB922019 A GB 922019A GB 38305/60 A GB38305/60 A GB 38305/60A GB 3830560 A GB3830560 A GB 3830560A GB 922019 A GB922019 A GB 922019A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reducing
- zone
- ore
- gas
- kiln
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C21B13/146—Multi-step reduction without melting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
<PICT:0922019/III/1> Magnetic particles containing Fe3O4 are formed from non-magnetic iron ore particles, e.g. haematite, Fe2O3, by contacting the ore in a preheating zone with p gases from a reducing zone which have been passed via a combustion zone to raise their temperature to, e.g. 1500 DEG -1700 DEG F., contacting the preheated ore in a reducing zone with a reducing gas, at preferably 1100 DEG -1500 DEG F., which contains a major proportion of steam mixed with H2 and CO2 and contacting the reduced ore in a cooling zone, at preferably 750 DEG -1500 DEG F., with a gas at lower temperature than the reducing zone, containing steam, CO, CO2 and hydrocarbon, which is then used as the reducing gas. Crushed haematite ore (e.g. containing 30-35% Fe) is fed through 19 to fluidized fines drier 3 and thence through 4 and hopper 2 to a refractory lined steel rotary kiln 1. The ore passes by gravity through the three zones of kiln 1 in countercurrent to the gases. Steam, at 212 DEG -400 DEG F., entering at 14 and hydrocarbon vapours, natural gas or liquid hydrocarbons, e.g. naphtha, kerosene or heating oil, entering at 15, pass through the cooling zone where part of the hydrocarbons and CO2 react with the steam to form H2 and CO2. Other reducing gas, e.g. producer or water gas, may be added through 16. The resulting reducing gases pass through the reducing zone and the remaining reducing constituents are burnt with air injected at 11 before entering the preheating zone. Fuel may be added at 11 to increase the temperature. A portion of the gases from kiln 1 may pass through 18 to drier 3 and thence through cyclone 21, the remainder of the gas passes through 23 to waste at 25 through waste heat boiler 24 forming steam which is fed to the kiln at 14. In an alternative apparatus (Fig. 2 not shown), the preheating is carried out in a separate kiln from the reducing and cooling. Fe3O4 is withdrawn at 13 for further cooling and processing, e.g. grinding, magnetic separation, briquetting or pelletizing. Fixed vertical kilns and fluidized beds may be used in place of a rotary kiln.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US173060A | 1960-01-11 | 1960-01-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB922019A true GB922019A (en) | 1963-03-27 |
Family
ID=21697545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB38305/60A Expired GB922019A (en) | 1960-01-11 | 1960-11-08 | Iron ore magnetic roast process |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE598980A (en) |
DE (1) | DE1171364B (en) |
FR (1) | FR1280797A (en) |
GB (1) | GB922019A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102631988A (en) * | 2012-04-19 | 2012-08-15 | 张家港白熊科美机械有限公司 | Magnetic-field air-separating device |
CN104673994A (en) * | 2014-04-30 | 2015-06-03 | 内蒙古科技大学 | Ore dressing method for roasting magnetized weakly-magnetic iron ores under external-reducer-free conditions |
CN110369123A (en) * | 2019-08-28 | 2019-10-25 | 山西惟泰安全环保工程技术有限公司 | A kind of deironing apparatus and technique of refractory material fine powder |
CN110369124A (en) * | 2019-08-28 | 2019-10-25 | 山西惟泰安全环保工程技术有限公司 | A kind of deironing apparatus that refractory material is novel and technique |
CN111023799A (en) * | 2019-10-22 | 2020-04-17 | 中国地质科学院矿产综合利用研究所 | Novel fluidization magnetization roasting system based on rotary kiln |
CN115094180A (en) * | 2022-06-23 | 2022-09-23 | 中冶赛迪技术研究中心有限公司 | Low-carbon rotary hearth furnace and using method thereof |
CN115820967A (en) * | 2022-12-02 | 2023-03-21 | 中冶长天国际工程有限责任公司 | Method and device for cooling reduction product of rotary kiln |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2477454A (en) * | 1944-09-15 | 1949-07-26 | Dorr Co | Process of reducing ferric oxide to ferrosoferric oxide |
-
0
- BE BE598980D patent/BE598980A/fr unknown
-
1960
- 1960-11-08 GB GB38305/60A patent/GB922019A/en not_active Expired
- 1960-11-28 FR FR845254A patent/FR1280797A/en not_active Expired
- 1960-11-30 DE DEE20254A patent/DE1171364B/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102631988A (en) * | 2012-04-19 | 2012-08-15 | 张家港白熊科美机械有限公司 | Magnetic-field air-separating device |
CN102631988B (en) * | 2012-04-19 | 2014-06-18 | 张家港白熊科美机械有限公司 | Magnetic-field air-separating device |
CN104673994A (en) * | 2014-04-30 | 2015-06-03 | 内蒙古科技大学 | Ore dressing method for roasting magnetized weakly-magnetic iron ores under external-reducer-free conditions |
CN110369123A (en) * | 2019-08-28 | 2019-10-25 | 山西惟泰安全环保工程技术有限公司 | A kind of deironing apparatus and technique of refractory material fine powder |
CN110369124A (en) * | 2019-08-28 | 2019-10-25 | 山西惟泰安全环保工程技术有限公司 | A kind of deironing apparatus that refractory material is novel and technique |
CN111023799A (en) * | 2019-10-22 | 2020-04-17 | 中国地质科学院矿产综合利用研究所 | Novel fluidization magnetization roasting system based on rotary kiln |
CN115094180A (en) * | 2022-06-23 | 2022-09-23 | 中冶赛迪技术研究中心有限公司 | Low-carbon rotary hearth furnace and using method thereof |
CN115820967A (en) * | 2022-12-02 | 2023-03-21 | 中冶长天国际工程有限责任公司 | Method and device for cooling reduction product of rotary kiln |
CN115820967B (en) * | 2022-12-02 | 2024-03-12 | 中冶长天国际工程有限责任公司 | Rotary kiln reduction product cooling method and device |
Also Published As
Publication number | Publication date |
---|---|
DE1171364B (en) | 1964-06-04 |
FR1280797A (en) | 1962-01-08 |
BE598980A (en) |
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