CN1807237A - Method for preparing iron carbide using iron ore concentrate powder - Google Patents
Method for preparing iron carbide using iron ore concentrate powder Download PDFInfo
- Publication number
- CN1807237A CN1807237A CN 200510120595 CN200510120595A CN1807237A CN 1807237 A CN1807237 A CN 1807237A CN 200510120595 CN200510120595 CN 200510120595 CN 200510120595 A CN200510120595 A CN 200510120595A CN 1807237 A CN1807237 A CN 1807237A
- Authority
- CN
- China
- Prior art keywords
- iron
- mixed gas
- iron carbide
- carbide
- breeze
- 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
Images
Abstract
The invention relates to a preparation method for Fe3C with iron concentrate powder, which comprises: adding the vanadium-contained oxide of 1~5wt% as additive into the iron concentrate powder; preparing into ball shape with proper water to dry and sinter in furnace for 10~20min at 800~900Deg; cooling to room temperature; reacting at 700~800Deg for 30~50min if CH4-H2 as mixed gas or 90~120min with CO-H2 or H2-CO-CO2 as mixed gas; cooling to room temperature with inert gas rapidly. This invention has fast speed and high conversion and well stability.
Description
One, technical field
The invention belongs to iron carbide (Fe
3C) preparation method relates in particular to a kind of method for preparing iron carbide with fine iron breeze.
Two, technical background
Iron carbide with its distinctive physical properties, chemical property and working condition, is subjected to extensive concern as a kind of direct-reduced iron product that occur the seventies: 1, receive metallurgist's concern with its outstanding advantage, and can be as the surrogate of steel scrap; 2, as steelmaking feed, compare with the blast furnace production technique of iron, the production temperature of iron carbide is lower, and the byproduct of its production process mainly is a water, the main products iron carbide is solid-state, stable, is easy to transportation and storage, therefore, the Production Flow Chart of iron carbide is as the alternative flow process of the technical process of traditional blast furnace ironmaking, in energy consumption, environmental protection with very big advantage is arranged economically; 3, the electromagnetic performance of iron carbide uniqueness can be used as information material and electromagnetic shielding material; 4, iron carbide can be used as hydrogen storage material.
For above-mentioned reasons, people are devoted to the research of iron carbide preparation always.The main preparation principle of iron carbide is under certain conditions, with containing the reducing gas of carburizing gas (as H
2-CH
4) react with iron ore, make iron carbide.
1, utilizes CH
4-H
2It is mixed gas production iron carbide.Studies show that in 650 ~ 950 ℃ temperature range, optimum operation condition is: CH
4: H
2Ratio be 40: 60,750 ℃ of temperature, most with this understanding iron ores all were transformed into iron carbide (Fe in 45 minutes
3C) [middle river is big, and mountain, village force is clear, little wild sun one, ほ か. synthetic To of セ メ Application イ ト and Pot The iron Mining stone proterties shadow Ring. material と プ ロ セ ス, 1994,7:85], [middle river is big, and mountain, village force is clear, little wild sun one, ほ か. synthetic To of セ メ Application イ ト and Pot The ガ ス Group become と temperature shadow Ring. material と プ ロ セ ス, 1995,8:109], [middle river is big, mountain, village force is clear, the positive .CH in little open country
4-H
2Mixing ガ ス To ょ Ru ァ イ ァ Application カ one バ ィ De System makes. iron と Steel, 1996,82 (4): 261]; Another research then shows [Ni Hongwei, grey big strong, Jiang Junpu. temperature of reaction, atmosphere are to the influence of iron carbide preparation process. steel research .1999, No.6:22-25]: powdered iron ore and H2-CH4 mixed gas reaction, when temperature is 700 ℃, the gas percentage composition is 50～80%H
2+ 20～50%CH
4The time, iron carbide early generates, and can keep conversion rate faster in early stage, but in the later stage of reaction, iron carbide transforms slower, and the decomposition reaction of iron carbide easily takes place; When temperature is 500 ℃, 600 ℃, the mixed gas percentage composition is 30～50%H
2+ 50～70%CH
4The time, can obtain higher iron carbide transformation efficiency, later but iron carbide begins to transform, and transform slowly.
2, utilize CO-H
2The mixed gas reducing iron ore.Studies show that [horse is strong for Wang Guanghui, Jiang Maofa. about the research of iron carbide. and steel-making .1997, Vol (12): 22-23]: CO-H
2Be that gas is difficult to directly obtain iron carbide from reduction of iron ore, add an amount of sulfurous gas (as H
2S) after, though can make iron carbide in 550～950 ℃ of scopes, the transformation efficiency of iron carbide is low, and brings sulfur impurity in the product into.
3, utilize the H2-CO-CO2 mixed gas to prepare iron carbide.In the time of 550～700 ℃, H
2-CO-CO
2Gas mixture can from iron ore, make iron carbide [Wang Guanghui, Jiang Maofa. utilize the experimental study of COREX tail gas reducing iron ore production iron carbide. iron and steel .1998, Vol.33, No.1:18-21], at 700 ℃, reducing gas composition 20%H
2+ 60%CO+20%CO
2Reaction is 4 hours under the condition, and the iron carbide transformation efficiency reaches as high as 94.02%.According to said method, though obtained comparatively ideal iron carbide transformation efficiency, transform too slow.
Although can obtain the transformation efficiency of higher iron carbide in laboratory scale, the slow and not high pressing issues that still need solve of productive rate of the conversion rate of iron carbide.CIRCOFER by the exploitation of German LURGI) technology (also iron carbide technology), fine iron breeze is participated in reaction at circulating fluidized bed earlier after preheating, and the products obtained therefrom degree of metalization can reach 80%, and through the subordinate phase reaction, degree of metalization can reach more than 93% again.This technology is produced equipment of direct reduction factory's operation under Trinidad and Tobago U.S. knob Ke (NUCOR) company in 1994 of 500,000 tons per year, but it is a lot of because of going wrong in the production process, it is stable that production can't reach, stopped industrialness production [metal Leader, the world, November 23 calendar year 2001: world's direct-reduced iron production new technology summary] in 1999.Nineteen ninety-five Grabke Hans Jurgen etc. find the stable influential [Grabke of sulphur to iron carbide, Hans Jurgen et al.:Effect of sulfur on the stability of cementite, SteelResearch, 66 (1995): 254].Thereafter, the clear second-class discovery H of the woods of Nagoya Institute of Technology
2-CH
4Add micro-H in the mixed gas
2S can suppress separating out of uncombined carbon, improves productive rate [the Hayashi etal.:Iron Carbide Synthesis by Reaction of Iron Ore with H of iron carbide
2-CH
4Gas MixturesContaining Traces of Sulfur, ISIJ Int., 37 (1997) 16,345], but sulphur do can make poisoning of catalyst in the reducing gas technological process at the reformation Sweet natural gas, also can bring sulfur impurity into to product, its application is restricted.
Three, summary of the invention
The purpose of this invention is to provide that a kind of speed of response is fast, transformation efficiency is high, good stability, do not increase sulfur-containing impurities prepare the method for iron carbide with fine iron breeze
For achieving the above object, the technical solution adopted in the present invention is, to contain barium oxide adds in the fine iron breeze as additive, add-on is 1%～5% of a fine iron breeze weight, join suitable quantity of water behind the mixing and make pelletizing, again with pelletizing oven dry, then the pelletizing of oven dry is put into temperature and is 800～900 ℃ stove sintering 10～20 minutes, take out and be cooled to room temperature; At last temperature be under 700～800 ℃ of conditions with mixed gas reaction, mixed gas is CH
4-H
2Shi Fanying 30～50 minutes, mixed gas are CO-H
2Or H
2-CO-CO
2Shi Fanying 90～180 minutes, the reaction back is quickly cooled to room temperature with rare gas element.
Describedly contain barium oxide or for V
2O
5, or be V
2O
3, or be V
2O
5, V
2O
3Mixture or be V
2O
5, V
2O
3Composite oxides.Wherein, V
2O
5, V
2O
3Mixture any for both than mixing V
2O
5, V
2O
3Composite oxides in V
2O
5Or V
2O
3Weight percentage be 25～75%.
The weight percentage of described fine iron breeze is: all iron content is not less than 64%, and sulphur content is less than 0.04%, TiO
2Be less than 0.5%; The granularity of fine iron breeze is below 80 orders.
Described mixed gas or be CH
4-H
2, or be CO-H
2, or be H
2-CO-CO
2Mixed gas CH
4-H
2Volumn concentration be 60～80%H
2+ 20～40%CH
4, mixed gas CO-H
2Volumn concentration be 60～85%CO+15～40%H
2, mixed gas H
2-CO-CO
2Volumn concentration be 10～30%H
2+ 50～70%CO+10～20%CO
2
Owing to adopt above-mentioned technology, the present invention has that speed of response is fast, transformation efficiency is high, good stability, do not increase the sulfur-containing impurities characteristics.
Four, description of drawings
Fig. 1 is the present invention and non-additive contrast synoptic diagram;
Fig. 2 is with TiO
2Be additive and non-additive contrast synoptic diagram.
Five, embodiment
1 one kinds of embodiment prepare the method for iron carbide with fine iron breeze, and it is as shown in the table for its fine ore chemical ingredients.Granularity is the following fine iron breezes of 80 orders, allocates industrial V into by 2%～4% of fine iron breeze weight
2O
5Be additive, both are mixed; Add and dry an amount of water is made the pelletizing of diameter 8mm～10mm with pelletizer after.Again pelletizing is put into 800～900 ℃ High Temperature Furnaces Heating Apparatus sintering and take out after 10～15 minutes and be cooled to room temperature, pelletizing preparation is so far finished.
The iron ore concentrate chemical ingredients
| Form | T.Fe | FeO | SiO 2 | CaO | MgO | S |
| Weight % | 67.05 | 0.81 | 1.89 | 0.89 | 0.11 | 0.033 |
Iron carbide preparation method: after the temperature of reaction vessel was raised to 700～800 ℃, logical nitrogen was driven the air in the container in reaction vessel, and pelletizing is inserted in the reaction vessel, treat temperature-stable after, feed reactant gases (70%H
2+ 30%CH
4), react after 30～35 minutes, change logical nitrogen and be quickly cooled to room temperature.
Products obtained therefrom is solemn Regensburg ear spectrum analysis, Fe in the product
3The turnover ratio of C is 96.0%.
Embodiment 2
The powdered iron ore raw material is identical with embodiment 1 with preparation process, and additive is that weight percentage is 60%V
2O
5+ 40%V
2O
3Mixture, addition is 2.0%～4.5% of a powdered iron ore weight.Reactant gases is H
2-CO-CO
2, its volumn concentration is 10～30%H
2+ 50～70%CO+10～20%CO
2After being 120～150 minutes with the pelletizing reaction times, feeding nitrogen and be quickly cooled to room temperature.
Products obtained therefrom is solemn Regensburg ear spectrum analysis, the Fe in the product
3The C turnover ratio is 95.0%.
Embodiment 3
Present embodiment is a reference examples.
The powdered iron ore raw material is identical with embodiment 1 with preparation process, adds V respectively
2O
5, TiO
2, another does not add any additives.V
2O
5, TiO
2Add-on respectively be 1～2% of powdered iron ore weight.The result as shown in Figure 1 and Figure 2.The rate of weight loss ascent stage is the reduction of iron ore among the figure, as seen uses additive V from Fig. 1, Fig. 2
2O
5Or TiO
2With not doping this elementary reaction speed all there is not obvious influence.Product began weightening finish after weightlessness reached maximum value among Fig. 1, Fig. 2, and this stage is the carbonation stage of iron.Learn with not adding any additives from Fig. 1 and to compare, add 1% V
2O
5Back carbonization speed can improve greatly, and Dui Zhao Fig. 2 adds 2% TiO with it
2The carbonization speed of iron is descended.In the identical reaction times (30 minutes), add 1% V
2O
5, additive-free, add 2% TiO
2Iron carbide transformation efficiency in the product is respectively 96%, 84.8%, 73.2%.Only add 1% V
2O
5The transformation efficiency of iron carbide is improved more than 10%, and speed of reaction also is improved.
Claims (5)
1, a kind of method for preparing iron carbide with fine iron breeze, it is characterized in that containing barium oxide adds in the fine iron breeze as additive, add-on is 1%～5% of a fine iron breeze weight, join suitable quantity of water behind the mixing and make pelletizing, again pelletizing is dried, then the pelletizing of oven dry is put into temperature and be 800～900 ℃ stove sintering 10～20 minutes, take out and be cooled to room temperature; At last temperature be under 700～800 ℃ of conditions with mixed gas reaction, mixed gas is CH
4-H
2Shi Fanying 30～50 minutes, mixed gas are CO-H
2Or H
2-CO-CO
2Shi Fanying 90～180 minutes, the reaction back is quickly cooled to room temperature with rare gas element.
2, according to claim 1ly prepare the method for iron carbide, it is characterized in that describedly containing barium oxide or being V with fine iron breeze
2O
5, or be V
2O
3, or be V
2O
5, V
2O
3Mixture or be V
2O
5, V
2O
3Composite oxides.
3, according to claim 2ly prepare the method for iron carbide, it is characterized in that described V with fine iron breeze
2O
5, V
2O
3Mixture any for both than mixing V
2O
5, V
2O
3Composite oxides in V
2O
5Or V
2O
3Weight percentage be 25～75%.
4, according to claim 1ly prepare the method for iron carbide with fine iron breeze, it is characterized in that the weight percentage of described fine iron breeze is: all iron content is not less than 64%, and sulphur content is less than 0.04%, TiO
2Be less than 0.5%; The granularity of fine iron breeze is below 80 orders.
5, according to claim 1ly prepare the method for iron carbide, it is characterized in that described mixed gas or be CH with fine iron breeze
4-H
2, or be CO-H
2, or be H
2-CO-CO
2Mixed gas CH
4-H
2Volumn concentration be 60～80%H
2+ 20～40%CH
4, mixed gas CO-H
2Volumn concentration be 60～85%CO+15～40%H
2, mixed gas H
2-CO-CO
2Volumn concentration be 10～30%H
2+ 50～70%CO+10～20%CO
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101205955A CN100410170C (en) | 2005-12-31 | 2005-12-31 | Method for preparing iron carbide using iron ore concentrate powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101205955A CN100410170C (en) | 2005-12-31 | 2005-12-31 | Method for preparing iron carbide using iron ore concentrate powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807237A true CN1807237A (en) | 2006-07-26 |
| CN100410170C CN100410170C (en) | 2008-08-13 |
Family
ID=36839363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101205955A Expired - Fee Related CN100410170C (en) | 2005-12-31 | 2005-12-31 | Method for preparing iron carbide using iron ore concentrate powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100410170C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361992A (en) * | 2009-04-07 | 2012-02-22 | 株式会社神户制钢所 | Method for producing metallic iron |
| CN107058720A (en) * | 2017-04-28 | 2017-08-18 | 苏州大学 | A kind of method that utilization low-grade complex iron ore prepares cementite |
| CN107082429A (en) * | 2017-04-28 | 2017-08-22 | 苏州大学 | A kind of method that utilization Dust of Iron And Steel Works prepares cementite |
| CN107082428A (en) * | 2017-04-28 | 2017-08-22 | 苏州大学 | A kind of method that cementite is prepared using many metal sulfate slags |
| CN108677022A (en) * | 2018-06-19 | 2018-10-19 | 苏州大学 | A kind of method that sintering dust separation ash prepares removing harmful element during cementite |
| CN109652604A (en) * | 2019-01-30 | 2019-04-19 | 上海大学 | A method of cementite is prepared using ferriferous oxide two-step method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1640110A1 (en) * | 1987-03-25 | 1991-04-07 | Украинский научно-исследовательский институт специальных сталей, сплавов и ферросплавов | Method of separation of titanium carbides from complex alloyed carbide steels |
| US5234674A (en) * | 1991-06-27 | 1993-08-10 | Teledyne Industries, Inc. | Process for the preparation of metal carbides |
| CN1033159C (en) * | 1992-07-20 | 1996-10-30 | 中国科学院合肥智能机械研究所 | Process for preparing nanometer material of carburetted steel |
| JP2948772B2 (en) * | 1997-02-28 | 1999-09-13 | 川崎重工業株式会社 | Manufacturing method of iron carbide |
| JP2002274829A (en) * | 2001-03-21 | 2002-09-25 | Daido Steel Co Ltd | Cementite or cementite-based compound and method of producing the same |
-
2005
- 2005-12-31 CN CNB2005101205955A patent/CN100410170C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361992A (en) * | 2009-04-07 | 2012-02-22 | 株式会社神户制钢所 | Method for producing metallic iron |
| CN107058720A (en) * | 2017-04-28 | 2017-08-18 | 苏州大学 | A kind of method that utilization low-grade complex iron ore prepares cementite |
| CN107082429A (en) * | 2017-04-28 | 2017-08-22 | 苏州大学 | A kind of method that utilization Dust of Iron And Steel Works prepares cementite |
| CN107082428A (en) * | 2017-04-28 | 2017-08-22 | 苏州大学 | A kind of method that cementite is prepared using many metal sulfate slags |
| CN107058720B (en) * | 2017-04-28 | 2018-12-14 | 苏州大学 | A method of cementite is prepared using low-grade complex iron ore |
| CN107082428B (en) * | 2017-04-28 | 2019-03-26 | 苏州大学 | A method of cementite is prepared using more metal sulfate slags |
| CN108677022A (en) * | 2018-06-19 | 2018-10-19 | 苏州大学 | A kind of method that sintering dust separation ash prepares removing harmful element during cementite |
| CN109652604A (en) * | 2019-01-30 | 2019-04-19 | 上海大学 | A method of cementite is prepared using ferriferous oxide two-step method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100410170C (en) | 2008-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101586172B (en) | Method for preparing metallized pellet and reduced iron powder | |
| CN100552057C (en) | The cold fixed molten production method of dividing of the direct electric reduction furnace of charcoal pelletizing that contains of vanadium titano-magnetite | |
| CN100410170C (en) | Method for preparing iron carbide using iron ore concentrate powder | |
| CN103305739B (en) | A kind of high nitrogen VN alloy VN18 and production method thereof | |
| CN101538630B (en) | Process and device for preparing chromium iron by using chromium ore powder | |
| CN104212929B (en) | The iron smelting method of gas-based shaft kiln directly reduced-magnetic separation separating treatment height phosphorus ore | |
| CN105969981A (en) | Process for comprehensively utilizing vanadium-titanium magnetite | |
| CN102296138B (en) | Method for preparing ferrovanadium intermetallic compound and titanium slags by linear moving bed prereduction and shaft furnace melting process | |
| CN108147443B (en) | Method for extracting aluminum oxide from fly ash and preparing ferro-silicon alloy | |
| CN102910596A (en) | Preparation method of vanadium nitride | |
| CN101215647B (en) | Roasting technique for extracting vanadium from stone coal vanadium ore | |
| CN102409170A (en) | High-mechanical strength carbon-containing pellets for blast furnace and production method for high-mechanical strength carbon-containing pellets | |
| CN105755195A (en) | Method for directly preparing molten steel from high-silicon iron ores | |
| CN107083479A (en) | The processing system and processing method of a kind of ferrous manganese ore | |
| CN111850216B (en) | Method for co-producing synthesis gas by reducing vanadium-titanium magnetite through biomass | |
| CN116875759A (en) | Recycling recovery method for recovering iron from laterite-nickel ore high-pressure leaching residues | |
| CN114873569A (en) | Method for preparing high-quality vanadium nitride by vanadium oxide reduction nitridation under reducing atmosphere | |
| CN103993165A (en) | Method for producing ferrovanadium by using ammonium metavanadate granulation to substitute flaky vanadium pentoxide | |
| CN111850217B (en) | Method for co-producing synthesis gas by reducing vanadium-titanium magnetite through biomass | |
| CN108950194B (en) | Method for chromite agglomeration | |
| CN1204273C (en) | Direct reduction process for rotary kiln | |
| CN109971907A (en) | A kind of method that high-speed rail copper ashes and ferric manganese ore collaborative SCM-magnetic separation prepare cupric iron powder | |
| CN114318005B (en) | Method for preparing high-grade nickel product by treating low-grade laterite-nickel ore with microwave | |
| CN103866078A (en) | Pre-reduction and melting comprehensive utilization method of high-iron type bauxite shaft furnace | |
| CN115304106B (en) | Method for producing calcium ferrite by combining semi-dry desulfurization ash and converter ash through high-temperature treatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |