CN102839250A - Method for collecting high-quality coal gas in process of producing reduced iron powder by means of microwave heating - Google Patents
Method for collecting high-quality coal gas in process of producing reduced iron powder by means of microwave heating Download PDFInfo
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- CN102839250A CN102839250A CN2012103684225A CN201210368422A CN102839250A CN 102839250 A CN102839250 A CN 102839250A CN 2012103684225 A CN2012103684225 A CN 2012103684225A CN 201210368422 A CN201210368422 A CN 201210368422A CN 102839250 A CN102839250 A CN 102839250A
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- iron
- coal
- quality
- charcoal
- coal gas
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003034 coal gas Substances 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 30
- 239000003610 charcoal Substances 0.000 claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 9
- 239000002817 coal dust Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 2
- 239000012256 powdered iron Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 14
- 239000002994 raw material Substances 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract description 2
- 239000002351 wastewater Substances 0.000 abstract description 2
- 239000002023 wood Substances 0.000 abstract 4
- 239000002699 waste material Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 description 5
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 4
- 238000007885 magnetic separation Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The invention provides a method for collecting high-quality coal gas in the process of producing reduced iron powder by means of microwave heating. The method comprises the following steps of: crushing an iron-containing raw material, wood charcoal and coal; distributing the materials layer by layer, wherein a bottom layer is provided with the coal or the wood charcoal of which the mass is 5 to 10 percent of that of the iron-containing raw material; a middle is provided with a mixture of the wood charcoal and the iron-containing raw material, the using amount of the wood charcoal is 11 to 17 percent of the mass of the iron-containing raw material; an upper layer is provided with the coal, and the using amount of the coal is 1 to 2 percent of the mass of the mixture on the middle layer; heating the distributed materials in a microwave reactor, heating the materials to the temperature of between 1,000 and 1,200 DEG C, and preserving the heat for 5 to 60 min; and collecting tail gas when preserving the heat, and thus obtaining the high-quality coal gas. According to the method, the high-quality coal gas can be produced when the reduced iron powder is produced by means of unique material distribution on the bottom layer and the microwave heating. The production cycle is short, the product quality is uniform, resources are comprehensively and efficiently utilized, and the production target of zero emission of waste water, waste gas and waste residue is reached. The volume fraction of combustible gas in the produced high-quality coal gas is between 91 and 95 percent, wherein CO accounts for 80 to 86 percent, and H2 accounts for 8 to 11 percent.
Description
Technical field
The present invention relates to a kind of method of in microwave heating production reduced iron powder process, collecting high-quality coal gas simultaneously, belong to microwave metallurgical and technical field of coal chemical industry.
Background technology
The production of tradition dri or the gas making of coalification factory, its purpose is single, and is low to the overall availability of resource.Microwave heating to ferrous material have volumetric heating, rate of heating fast, can supply/stop advantages such as heat, heating efficiency are high, pollution-free and auxiliary facility is few to product immediately; In the industrial production; Microwave heating is being widely used and (can tracing back to 1962 the earliest with the middle low temperature field of drying as representative; US19620225218), and very wide in the applied research in pyrometallurgy field, yet be in the exploratory stage but be applied to industrial microwave high-temperature metallurgy.
The main technique of producing reduced iron powder at present is complete outer Hogonas method of joining reductive agent: by the ring-type that three layers of material are formed, the middle layer is the ferriferous oxide powder, and the inside/outside ring all is a coal dust.The principal feature of this method is the indirect reduction that is reduced to of ferriferous oxide, CO in the tail gas
2Content is high, and recycle value is low.
Summary of the invention
The objective of the invention is to solve quality how to improve tail gas in the microwave heating industrial production reduced iron powder process; Provide a kind of and produce the method for collecting high-quality coal gas simultaneously in the reduced iron powder process, with efficient collection that realizes tail gas and the production cycle that shortens reduced iron powder in microwave heating.
The present invention realizes through following technical proposal: a kind of method of in microwave heating production reduced iron powder process, collecting high-quality coal gas simultaneously, and following each step of process:
(1) raw material is prepared: iron-bearing material, charcoal, coal dust are broken to 100～200 orders;
(2) cloth: with step (1) be equipped with material and carry out layer-by-layer distribution: bottom is coal or charcoal, is 5～10% of iron-bearing material quality; The middle level is the mixture of charcoal and iron-bearing material, and the amount of getting of charcoal is 11～17% of an iron-bearing material quality; The upper strata is a coal, and the amount of getting of this layer coal is 1～2% of a middle level mixture quality;
(3) heating: the good material of step (2) cloth is placed microwave reactor internal heating to 1000～1200 ℃, insulation 5～60min, during collect tail gas, promptly obtain high-quality coal gas.
Said iron-bearing material is powdered iron concentrate or iron scale, its T
Fe(full iron)>=71%.
The volatile matter of said coal and charcoal >=21%.
Furnace charge after the gained reduction cools off, pulverizes, and screening, wet magnetic separation is drying to obtain reduced iron powder (T of fine
Fe=98～99%).
Advantage that the present invention possesses and effect: through the ply stratum and the microwave heating of uniqueness, production high-quality coal gas when can produce reduced iron powder.With short production cycle, uniform in quality have realized the comprehensive and efficient of resource utilized, and have reached the productive target of waste water,waste gas and industrial residue zero release.The volume(tric)fraction of inflammable gas is 91～95% in the high-quality coal gas of output, and wherein: CO accounts for 80～86%, H
2Account for 8～11%.
Embodiment
Below in conjunction with embodiment the present invention is further specified.
Embodiment 1
(1) raw material is prepared: with powdery iron scale (T
Fe>=71%), the coal dust of the charcoal of volatile matter>=21%, volatile matter>=21% is broken to 150 orders;
(2) cloth: with step (1) be equipped with material and carry out layer-by-layer distribution: bottom is a coal, is 10% of iron-bearing material quality; The middle level is the mixture of charcoal and iron-bearing material, and the amount of getting of charcoal is 15% of an iron-bearing material quality; The upper strata is a coal, and the amount of getting of this layer coal is 1% of a middle level mixture quality;
(3) heating: the good material of step (2) cloth is placed microwave reactor internal heating to 1000 ℃, insulation 60min, during collect tail gas, (volume(tric)fraction of inflammable gas is 94.443%, and wherein: CO accounts for 83.142%, H promptly to obtain high-quality coal gas
2Account for 10.31%, CH
4Account for 0.991%, CO
2Account for 5.556%.）。
Furnace charge after the gained reduction cools off, pulverizes, and screening, wet magnetic separation is drying to obtain reduced iron powder (T of fine
Fe=98.99%).
Embodiment 2
(1) raw material is prepared: with powdery iron scale (T
FeBe 74%), volatilization is divided into 25% charcoal, volatilization and is divided into 26% coal dust and is broken to 100 orders;
(2) cloth: with step (1) be equipped with material and carry out layer-by-layer distribution: bottom is a charcoal, is 8% of iron-bearing material quality; The middle level is the mixture of charcoal and iron-bearing material, and the amount of getting of charcoal is 11% of an iron-bearing material quality; The upper strata is a coal, and the amount of getting of this layer coal is 2% of a middle level mixture quality;
(3) heating: the good material of step (2) cloth is placed microwave reactor internal heating to 1100 ℃, insulation 40min, during collect tail gas, (volume(tric)fraction of inflammable gas is 94.353%, and wherein: CO accounts for 83.637%, H promptly to obtain high-quality coal gas
2Account for 9.722%, CH
4Account for 0.994%, CO
2Account for 5.532%.）。
Furnace charge after the gained reduction cools off, pulverizes, and screening, wet magnetic separation is drying to obtain reduced iron powder (T of fine
Fe=98.47%).
Embodiment 3
(1) raw material is prepared: with powdery iron scale (T
FeBe 74%), volatilization is divided into 25% charcoal, volatilization and is divided into 26% coal dust and is broken to 200 orders;
(2) cloth: with step (1) be equipped with material and carry out layer-by-layer distribution: bottom is a coal, is 5% of iron-bearing material quality; The middle level is the mixture of charcoal and iron-bearing material, and the amount of getting of charcoal is 17% of an iron-bearing material quality; The upper strata is a coal, and the amount of getting of this layer coal is 1.5% of a middle level mixture quality;
(3) heating: the good material of step (2) cloth is placed microwave reactor internal heating to 1200 ℃, insulation 5min, during collect tail gas, (volume(tric)fraction of inflammable gas is 94.514%, and wherein: CO accounts for 82.985%, H promptly to obtain high-quality coal gas
2Account for 10.551%, CH
4Account for 0.978%, CO
2Account for 5.479%.）。
Furnace charge after the gained reduction cools off, pulverizes, and screening, wet magnetic separation is drying to obtain reduced iron powder (T of fine
Fe=98.94%).
Claims (3)
1. produce the method for collecting high-quality coal gas simultaneously in the reduced iron powder process in microwave heating for one kind, it is characterized in that through following each step:
(1) iron-bearing material, charcoal, coal dust are broken to 100～200 orders;
(2) with step (1) be equipped with material and carry out layer-by-layer distribution: bottom is coal or charcoal, is 5～10% of iron-bearing material quality; The middle level is the mixture of charcoal and iron-bearing material, and the amount of getting of charcoal is 11～17% of an iron-bearing material quality; The upper strata is a coal, and the amount of getting of this layer coal is 1～2% of a middle level mixture quality;
(3) the good material of step (2) cloth is placed microwave reactor internal heating to 1000～1200 ℃, insulation 5～60min, during collect tail gas, promptly obtain high-quality coal gas.
2. method of in microwave heating production reduced iron powder process, collecting high-quality coal gas simultaneously according to claim 1, it is characterized in that: said iron-bearing material is powdered iron concentrate or iron scale, its T
Fe(full iron)>=71%.
3. method of in microwave heating production reduced iron powder process, collecting high-quality coal gas simultaneously according to claim 1 and 2 is characterized in that: the volatile matter of said coal and charcoal >=21%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210368422.5A CN102839250B (en) | 2012-09-28 | 2012-09-28 | Method for collecting high-quality coal gas in process of producing reduced iron powder by means of microwave heating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210368422.5A CN102839250B (en) | 2012-09-28 | 2012-09-28 | Method for collecting high-quality coal gas in process of producing reduced iron powder by means of microwave heating |
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| Publication Number | Publication Date |
|---|---|
| CN102839250A true CN102839250A (en) | 2012-12-26 |
| CN102839250B CN102839250B (en) | 2014-07-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962568A (en) * | 2014-04-15 | 2014-08-06 | 昆明理工大学 | Method for preparing reduction chromium powder through microwave heating |
| CN108048612A (en) * | 2017-11-28 | 2018-05-18 | 辽宁科技大学 | A kind of utilization regenerative resource reduces iron scale under microwave and prepares high-purity sponge iron process |
| CN108148938A (en) * | 2017-11-28 | 2018-06-12 | 辽宁科技大学 | More gradient vacuum method direct-reduction iron scales prepare high-purity iron powder method off field outside a kind of microwave |
| CN115747400A (en) * | 2022-11-28 | 2023-03-07 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
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| WO2004068907A1 (en) * | 2003-01-24 | 2004-08-12 | Entema | Microwave radiation heating device and method of implementing same |
| CN1676252A (en) * | 2005-04-25 | 2005-10-05 | 昆明理工大学 | Method for preparing natural micro alloy iron powder from vanadium-titanium-iron headings by microwave radiation |
| CN1724695A (en) * | 2005-05-10 | 2006-01-25 | 太原理工大学 | Method of manufacturing low carbon sponge iron using microwave vertical furnace |
| CN1733943A (en) * | 2004-08-10 | 2006-02-15 | 孔凡逸 | Method and device for manufacturing reduced iron using microwave fluid bed |
-
2012
- 2012-09-28 CN CN201210368422.5A patent/CN102839250B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004068907A1 (en) * | 2003-01-24 | 2004-08-12 | Entema | Microwave radiation heating device and method of implementing same |
| CN1733943A (en) * | 2004-08-10 | 2006-02-15 | 孔凡逸 | Method and device for manufacturing reduced iron using microwave fluid bed |
| CN1676252A (en) * | 2005-04-25 | 2005-10-05 | 昆明理工大学 | Method for preparing natural micro alloy iron powder from vanadium-titanium-iron headings by microwave radiation |
| CN1724695A (en) * | 2005-05-10 | 2006-01-25 | 太原理工大学 | Method of manufacturing low carbon sponge iron using microwave vertical furnace |
Non-Patent Citations (1)
| Title |
|---|
| 杨卜等: "微波辐射钒钛磁铁精矿制备铁粉新工艺研究", 《中国工程科学》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103962568A (en) * | 2014-04-15 | 2014-08-06 | 昆明理工大学 | Method for preparing reduction chromium powder through microwave heating |
| CN103962568B (en) * | 2014-04-15 | 2016-06-22 | 昆明理工大学 | A kind of method of microwave heating preparation reduction chromium powder |
| CN108048612A (en) * | 2017-11-28 | 2018-05-18 | 辽宁科技大学 | A kind of utilization regenerative resource reduces iron scale under microwave and prepares high-purity sponge iron process |
| CN108148938A (en) * | 2017-11-28 | 2018-06-12 | 辽宁科技大学 | More gradient vacuum method direct-reduction iron scales prepare high-purity iron powder method off field outside a kind of microwave |
| CN108048612B (en) * | 2017-11-28 | 2019-08-20 | 辽宁科技大学 | It is a kind of to restore iron scale under microwave using renewable energy and prepare high-purity sponge iron process |
| CN115747400A (en) * | 2022-11-28 | 2023-03-07 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
| CN115747400B (en) * | 2022-11-28 | 2024-03-12 | 李扬 | Method for producing high-end sponge iron powder from fine iron powder |
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| CN102839250B (en) | 2014-07-30 |
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