CN101122442A - Iron mineral suspended magnetic baking oven system and baking process - Google Patents
Iron mineral suspended magnetic baking oven system and baking process Download PDFInfo
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- CN101122442A CN101122442A CNA2007100128024A CN200710012802A CN101122442A CN 101122442 A CN101122442 A CN 101122442A CN A2007100128024 A CNA2007100128024 A CN A2007100128024A CN 200710012802 A CN200710012802 A CN 200710012802A CN 101122442 A CN101122442 A CN 101122442A
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- 229910001608 iron mineral Inorganic materials 0.000 title claims abstract description 12
- 230000005291 magnetic effect Effects 0.000 title claims description 14
- 238000000034 method Methods 0.000 title claims description 10
- 239000000725 suspension Substances 0.000 claims abstract description 44
- 230000005415 magnetization Effects 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 37
- 229910052742 iron Inorganic materials 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 15
- 239000007789 gas Substances 0.000 claims description 14
- 238000001354 calcination Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000012141 concentrate Substances 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 229910021646 siderite Inorganic materials 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- DQMUQFUTDWISTM-UHFFFAOYSA-N O.[O-2].[Fe+2].[Fe+2].[O-2] Chemical compound O.[O-2].[Fe+2].[Fe+2].[O-2] DQMUQFUTDWISTM-UHFFFAOYSA-N 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910052598 goethite Inorganic materials 0.000 claims description 3
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 claims description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010882 bottom ash Substances 0.000 claims description 2
- 239000003034 coal gas Substances 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 239000012717 electrostatic precipitator Substances 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 claims description 2
- 239000012065 filter cake Substances 0.000 claims description 2
- 239000000295 fuel oil Substances 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005453 pelletization Methods 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000007363 ring formation reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
An iron mineral suspension magnetization baking furnace system includes a suspension magnetization baking furnace, a feeding bin, an electronic quantitative feeder, a suspension pre-heater, a suspension cooler, a duster, an ahs returning system and an induced draft fan. A discharging port of the electronic quantitative feeder is connected with a feed inlet of a screw feeder through a chute. A discharging port of the screw feeder is connected with a feed inlet of the first stage suspension pre-heater. A discharging port of the second stage suspension pre-heater is connected with a feed inlet of the suspension magnetization baking furnace through a pipe. A flue gas outlet of a cyclone separator of the suspension magnetization baking furnace is connected with an inlet of the second stage suspension pre-heater. A flue gas outlet of the first stage suspension pre-heater is connected with a flue gas inlet of the duster through a pipe. A discharging port of the cyclone separator of the suspension magnetization baking furnace is connected with a feed inlet of the chute through a pipe. The discharging port of the chute is connected with a feed inlet of the first stage suspension cooler. An outlet of the duster is connected with the induced draft fan through a pipe. The invention has the advantages of complete heat recovery system and low energy consumption without production operating problems of ringing, crust, frits, etc.
Description
Technical field
The present invention relates to a kind of iron mineral suspended magnetizing roasting device, specifically relate to one and be applicable to suspended magnetic baking oven system and the roasting technique of from siderite, limonite, goethite, bloodstone, complicated heterogeneous mixing iron ore, iron-containing slag and red mud, producing iron ore concentrate.
Background technology
The principle of magnetizing roast is the process that under the heated condition volatile substance in the refractory iron ore thing (carbon dioxide, water) is removed or di-iron trioxide wherein is reduced into tri-iron tetroxide.The magnetizing roast process of traditional processing technology realizes in shaft kiln, rotary kiln.
The shaft kiln production technology is relatively backward, is easy to generate burning and underburnt, and the iron ore reduction rate is low, can not handle the raw material that is prone to hot powder phenomenon-tion as limonite, siderite one class.
The rotary kiln production technology has overcome the above-mentioned shortcoming of shaft kiln to a certain extent, but hear rate is very high, has ring formation, skinning simultaneously, production operation problems such as frit occur.
No matter shaft kiln or rotary kiln, the production capacity of single device is all not really high.
Summary of the invention
The objective of the invention is provides a kind of iron mineral suspended magnetic baking oven system and roasting technique at above shortcomings in the known technology.
The technical scheme that adopts is:
Iron mineral suspended magnetic baking oven system comprises suspending magnetization roasting furnace, feed hopper, electronics constant feeder, suspended preheater, suspension cooler, deduster, returns ash system, air-introduced machine.
The feed hopper discharging opening be positioned at electronics constant feeder material inlet directly over or connect by chute.The discharging opening of electronics constant feeder, be positioned at the screw feeder machine inlet capable directly over, or the discharging opening of electronics constant feeder is connected with the screw feeder machine inlet capable by chute.The discharging opening of screw(-type) feeder is connected with the feeding mouth of first stage suspension preheater.Secondary suspended preheater discharging opening is connected with the feeding mouth of suspending magnetization roasting furnace by pipeline.The exhanst gas outlet of the cyclone separator of suspending magnetization roasting furnace is connected by the inlet of pipeline with the secondary suspended preheater.The exhanst gas outlet of first stage suspension preheater is connected with the smoke inlet of deduster by pipeline.The discharge gate of the cyclone separator of suspending magnetization roasting furnace is connected with the feeding mouth that stops chute by pipeline.The discharge gate that stops chute is connected with the feeding mouth of first stage suspension cooler.The discharge gate of first stage suspension cooler is connected with the feeding mouth of secondary suspension cooler.The discharge gate of secondary suspension cooler is connected with three grades of suspension cooler feeding mouths.Three grades of suspension cooler lower ends are provided with discharge gate.The outlet of deduster is connected with air-introduced machine by pipeline, and the air-introduced machine outlet is connected with the air intake of chimney by pipeline.
Above-mentioned suspended preheater adopts the two-stage suspended preheater, and above-mentioned suspension cooler adopts three grades of suspension cooler.
Iron mineral suspended magnetic baking oven system of the present invention and roasting technique have following advantage:
1, all kinds of iron-bearing minerals of extensive treatments comprise mine tailing, slag and red mud the like waste, realize the reasonable resources utilization.
2, granular material is suspended in and carries out quick caloic transmission and drastic reduction reaction, calcining quality height in the air-flow.
3, have complete heat recovery system, energy consumption is very low.
4, no ring formation, skinning, production operation problems such as frit appear.
5, automaticity height, running rate height.
6, separate unit stove production capacity is very big, can reach 2,000,000 tons of calcining/years, thereby the unit product investment is low.
Description of drawings
Fig. 1 is the structural representation of iron mineral suspended magnetic baking oven system of the present invention.
The specific embodiment
Iron mineral suspended magnetic baking oven system comprises suspending magnetization roasting furnace 6, two-stage suspended preheater 4 and 5, three grades of suspension cooler 7,8,9, feed hopper 1, electronics constant feeder 2, screw(-type) feeder 3, deduster 10, air-introduced machine 12, roots blower 13 and air lift mud pump 14.
The discharging opening of feed hopper 1 is connected with the feeding mouth of electronics constant feeder 2, and the discharging opening of screw(-type) feeder 3 is connected with the charging aperture of first order suspended preheater by feed pipe 16.The discharging opening of first order suspended preheater 4 17 is connected with the feeding mouth of pipeline 18 with second level suspended preheater 5 by the road, the discharging opening of second level suspended preheater 5 24 is connected with the charging aperture of suspending magnetization roasting furnace 6 by the road, and the exhanst gas outlet of the cyclone separator of suspending magnetization roasting furnace 6 18 is connected with second level suspended preheater 5 by the road.The exhanst gas outlet of first order suspended preheater 4 19 is connected with the air inlet of deduster 10 by the road, and deduster 10 is an electrostatic precipitator.The cyclone separator discharge gate of suspending magnetization roasting furnace 6 with stop chute 15 feeding mouths and be connected.Stop chute 15 discharge gates and 21 be connected with first order suspension cooler 7 feeding mouths with pipeline 27 by the road, first order suspension cooler exhaust outlet 20 is connected with suspending magnetization roasting furnace 6 air induction conduits by the road.First order suspension cooler discharge gate 28 is connected with second level suspension cooler 8 charging apertures with pipeline 29 by the road, second level suspension cooler discharge gate 30 is connected with third level suspension cooler 9 charging apertures with pipeline 31 by the road, and the lower end of suspension cooler 9 is a product offtake.The gas outlet of deduster 10 22 is connected with the air inlet of air-introduced machine 12 by the road, is equiped with air door 11 on the pipeline 22.The gas outlet of air-introduced machine 12 23 is connected with chimney 26 by the road.The ash discharging hole of deduster 10 is connected with air lift mud pump 14 charging apertures, and roots blower 13 exhaust outlets are connected with air lift mud pump 14 air inlets, and the air lift mud pump discharge gate is connected with second level suspended preheater 5 bottom ash inlet tubes.
Iron mineral suspended magnetizing roast technology comprises following process steps:
1, crude fuel
Raw material can be a kind of in siderite, limonite, goethite, bloodstone, complicated heterogeneous mixing iron ore, iron-containing slag, the red mud, breeze, filter cake all can, it is below 200 microns that particle mean size requires.
Fuel can use coal gas, natural gas, fuel oil etc.
2, feed
Selected raw material is sent in the feed hopper 1, and the raw material in the feed hopper 1 is discharged into screw(-type) feeder 3 after 2 meterings of electronics constant feeder, be delivered in the feed pipe 16 of first stage suspension preheater 4 through screw(-type) feeder 3.
3, preheating
4, magnetizing roast
Material through preheating and preroast 24 enters in the suspending magnetization roasting furnace 6 by the road, carries out roasting under heated condition, remove the crystallization water or carbon dioxide after, low impurity raw material roasting becomes the iron ore concentrate calcining, can be directly as product; The roasting under controlled reducing atmosphere of high impurity raw material becomes the magnetic iron ore calcining.
Sintering temperature is selected according to the kind and the character of raw material, and scope is at 300 degrees centigrade to 700 degrees centigrade.
5, material cooling
Calcining from suspending magnetization roasting furnace be discharged into cooling system after hot gas separates and cool off.Cooling is carried out in 3 grades of suspension cooler 7,8,9 step by step, and is compact to design because of 3 grades of suspension cooler are vertically installed, so iron ore concentrate can reach countercurrent heat exchange completely with cold air, and magnetic iron ore is oxidized to ferromagnetic γ di-iron trioxide discharges.The air of cooling usefulness is taken from atmosphere.
6, dust pelletizing system
The ash-laden gas that comes from the first stage suspension preheater 19 enters deduster 10 and carries out dedusting by the road, the deduster bottom is provided with air flume, by roots blower and air lift mud pump the dust of collecting 25 is sent in the secondary suspended preheater 5 by the road, be implemented in the closed circuit dust that in the dirt system deduster is captured that returns and all reclaim.
Flue gas after the udst separation is sent into chimney 26 emptyings by air-introduced machine 12.
Claims (2)
1. iron mineral suspended magnetic baking oven system, comprise suspending magnetization roasting furnace (6), first order suspended preheater (4) and second level suspended preheater (5), three grades of suspension cooler (7), (8), (9), feed hopper (1), electronics constant feeder (2), screw(-type) feeder (3), deduster (10), air-introduced machine (12), roots blower (13) and air lift mud pump (14) is characterized in that:
The discharging opening of feed hopper (1) is connected with the feeding mouth of electronics constant feeder (2), and the discharging opening of screw(-type) feeder (3) is connected with the charging aperture of first order suspended preheater by feed pipe (16); The discharging opening of first order suspended preheater (4) (17) by the road is connected with the feeding mouth of pipeline (18) with second level suspended preheater (5), the discharging opening of second level suspended preheater (5) (24) by the road is connected with the charging aperture of suspending magnetization roasting furnace (6), and the exhanst gas outlet of suspending magnetization roasting furnace (6) cyclone separator (18) by the road is connected with second level suspended preheater (5); The exhanst gas outlet of first order suspended preheater (4) (19) by the road is connected with the air inlet of deduster (10), and deduster (10) is an electrostatic precipitator; The cyclone separator discharge gate of suspending magnetization roasting furnace (6) with stop chute (15) feeding mouth and be connected; Stop chute (15) discharge gate by the road (21) be connected with first order suspension cooler (7) feeding mouth with pipeline (27), first order suspension cooler exhaust outlet (20) by the road is connected with suspending magnetization roasting furnace (6) air induction conduit; First order suspension cooler (7) discharge gate (28) by the road is connected with second level suspension cooler (8) charging aperture with pipeline (29), second level suspension cooler (8) discharge gate (30) by the road is connected with third level suspension cooler (9) charging aperture with pipeline (31), and the lower end of third level suspension cooler (9) is a product offtake; The gas outlet of deduster (10) (22) by the road is connected with the air inlet of air-introduced machine (12), is equiped with air door (11) on the pipeline (22); The gas outlet of air-introduced machine (12) (23) by the road is connected with chimney (26); The ash discharging hole of deduster (10) is connected with air lift mud pump (14) charging aperture, and roots blower (13) exhaust outlet is connected with air lift mud pump (14) air inlet, and the air lift mud pump discharge gate is connected with second level suspended preheater (5) bottom ash inlet tube.
2. the roasting technique of iron mineral suspended magnetic baking oven system is characterized in that comprising following process steps:
A, crude fuel
Raw material can be a kind of in siderite, limonite, goethite, bloodstone, complicated heterogeneous mixing iron ore, iron-containing slag, the red mud, breeze, filter cake all can, particle mean size requires to below (200) micron;
Fuel can use coal gas, natural gas, fuel oil etc.;
B, feed
Selected raw material is sent in the feed hopper (1), and the raw material in the feed hopper (1) is discharged into screw(-type) feeder (3) after electronics constant feeder (2) metering, be delivered in the feed pipe (16) of first order suspended preheater (4) through screw(-type) feeder (3);
C, preheating
Material is brought in the body of first order suspended preheater (4) and with flue gas through feed pipe (16) by air-flow and is separated, (17), (18) are mixed in the second level suspended preheater (5) with hot flue gas from roaster then by the road, be preheated and preroast, the raw material of preroast carries out secondary separation with flue gas at this;
D, magnetizing roast
Through the material of preheating and preroast by the road (24) enter in the suspending magnetization roasting furnace (6), under heated condition, carry out roasting, remove the crystallization water or carbon dioxide after, low impurity raw material roasting becomes the iron ore concentrate calcining, can be directly as product; The roasting under controlled reducing atmosphere of high impurity raw material becomes the magnetic iron ore calcining;
Sintering temperature is selected according to the kind and the character of raw material, and scope is in (300) degree centigrade to (700) degree centigrade;
E, material cooling
Calcining from suspending magnetization roasting furnace be discharged into cooling system after hot gas separates and cool off; Cooling is carried out in (3) level suspension cooler (7), (8), (9) step by step, and iron ore concentrate can reach countercurrent heat exchange completely with cold air, and magnetic iron ore is oxidized to ferromagnetic γ di-iron trioxide discharge; The air of cooling usefulness is taken from atmosphere;
F, dust pelletizing system
The ash-laden gas that comes from first order suspended preheater (19) by the road enters deduster (10) and carries out dedusting, the deduster bottom is provided with air flume, by roots blower and air lift mud pump the dust of collecting by the road (25) send in the second level suspended preheater (5), be implemented in the closed circuit dust that in the dirt system deduster is captured that returns and all reclaim; Flue gas after the udst separation is sent into chimney (26) emptying by air-introduced machine (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100128024A CN101122442B (en) | 2007-09-12 | 2007-09-12 | Iron mineral suspended magnetic baking oven system and baking process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100128024A CN101122442B (en) | 2007-09-12 | 2007-09-12 | Iron mineral suspended magnetic baking oven system and baking process |
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| Publication Number | Publication Date |
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| CN101122442A true CN101122442A (en) | 2008-02-13 |
| CN101122442B CN101122442B (en) | 2010-12-08 |
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