CN100507011C - Roasting device for reducing hematite, limonite or siderite - Google Patents
Roasting device for reducing hematite, limonite or siderite Download PDFInfo
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- CN100507011C CN100507011C CNB2006100324843A CN200610032484A CN100507011C CN 100507011 C CN100507011 C CN 100507011C CN B2006100324843 A CNB2006100324843 A CN B2006100324843A CN 200610032484 A CN200610032484 A CN 200610032484A CN 100507011 C CN100507011 C CN 100507011C
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Abstract
The invention relates to a reduction roasting device capable of reducing micro-powder hematite, limonite and siderite into magnetite. The device consists of a suspension preheater, a flash roasting furnace, an air locking valve, a pipeline, a hot blast stove and the like. The suspension preheater consists of 3-5 stages of preheaters which are arranged up and down, the flash roasting furnace consists of an upper volute, a feeding hole, a reaction chamber and a lower volute, and the lower volute of the flash roasting furnace is connected with the hot blast furnace through a pipeline. Fine middlings sequentially pass through a multi-stage preheater and enter a flash roasting furnace for reduction, the reduced materials pass through a final stage preheater to obtain a product , and the product is subjected to low intensity magnetic separation to obtain TFeHigh-grade iron ore concentrate with the concentration of more than 60 percent. Compared with a rotary kiln, the invention has the advantages of small investment, large mineral processing capacity, high ore reduction speed, short time, low energy consumption and the like.
Description
Technical field: the present invention relates to ore dressing reduced iron mineral calciner, relate in particular to the reduction roasting device of oxidized ores such as rhombohedral iron ore, limonite, spathic iron ore.
Background technology: lean ore accounts for more than 97% in China's iron ore deposit, rich ore is few, iron content only about 20%, select the oxidized ore iron ore and there is half to belong to difficulty in the iron ore total reserves, quite a few hematite (rhombohedral iron ore, spathic iron ore, limonite symbiosis) gangue content is very complicated, not only iron content is low, granularity embedding cloth is thin, also contain gangue minerals such as ferrosilicate with physics, the chemical property of a great deal of diopside close with it, the tremolite, garnet, jasper etc., very difficulty is very big to cause sorting.By magnetizing roasting, making it change magnetite into to the complicated difficult ore dressing of this class of rhombohedral iron ore, limonite, spathic iron ore, carry out and the separating of gangue mineral again, is effective separation method.But all the time, the Technology of magnetizing roasting and equipment fail to make a breakthrough, after scale enlarges, and effective control process parameters, simultaneously, cost is higher.The reduction shaft furnace stoving oven was once had in the iron and steel enterprise that China has, the iron and steel enterprise that has successively all once carried out the rotary kiln test, because the ore grain size that reducing roasting is handled thick (75～15mm), the material magnetizing roasting time long (about 1～2h), reduction process is slow, energy consumption and cost height have all stopped producing.USSR (Union of Soviet Socialist Republics) once had 30 Φ 3.5m, and the rotary kiln of L50m is handled the Krivoi ferric oxide ore, also owing to energy consumption height, cost height, and stopped to produce in last century end.Also once there was the investigator above-mentioned chats to be made in advance the pelletizing of 5～10mm, send into rotary kiln and carry out magnetizing roasting, and then carry out magnetic separation, can obtain good recovering effect, but technical process complexity, the energy consumption height, uneconomical economically, so that this technology never has successful large-scale industrial application.
Summary of the invention: the objective of the invention is to for the ore dressing calcining magnetic separation provide a kind of can make particulate (＜0.2mm) difficulties such as rhombohedral iron ore, limonite, spathic iron ore select ferric oxide ore under high temperature reduction atmospheric condition and fluidized state, realize Fe in the times of number in second
2O
3(weak magnetic) is to Fe
3O
4(ferromagnetism) changes, and microgranular rhombohedral iron ore, limonite, spathic iron ore is reduced into the calciner of magnetite.
Technical scheme of the present invention is: the reduction roasting device of rhombohedral iron ore, limonite, spathic iron ore is made up of parts such as suspended preheater, flash roaster, air valve, pipeline, vacuum fan and hotblast stoves.Suspended preheater is made up of 3～5 grades of cyclone preheaters of cross arrangement up and down, each whirlwind tube and the pipeline that is attached thereto form the one-level cyclone preheater, the outlet of whirlwind tube is equipped with air valve and two plate valve through the pipe connection of air valve and next stage at final stage whirlwind tube outlet pipe; Flash roaster is made up of opening for feed, involute urve air outlet (scroll casing shape outlet), cylindrical shell, involute urve inlet mouth (scroll casing shape import), opening for feed is coaxial with cylindrical shell at the cylindrical shell top, cylindrical shell is made up of the bottom of cylindrical top and inverted cone stage body, and involute urve air outlet and involute urve inlet mouth be next side on cylindrical shell respectively; Flash roaster top opening for feed is connected with the most last two stage cyclone preheater pipeline respectively with the air outlet, and the bottom inlet mouth is connected with the hotblast stove outlet; One end of hotblast stove is equipped with burner;
The import of chopped-off head whirlwind tube is connected with vacuum fan with dust-precipitator by pipeline, the logical atmosphere of a pipeline behind the vacuum fan, and a loop leads to the combustion chamber, to regulate the combustion chamber gaseous constituent to set(ting)value.
Suspended preheater is made up of any preheater in multistage cyclone preheater, shaft preheater or the combined type preheating device.
The invention has the advantages that and can save the very big conversion unit-rotary kiln of investment, the mineral processing amount improves greatly, and energy consumption significantly reduces, and production cost reduces significantly.With lower energy consumption and investment, finished of the conversion of oxidized ores such as particulate rhombohedral iron ore, limonite, spathic iron ore to magnetite, be able in industrial production, realize for weak magnetic separation process sorts out high-quality iron ore concentrate sorting technology, and make a large amount of difficulty of China select oxidized ore, fully reclaimed.
Description of drawings:
Fig. 1 is the calciner synoptic diagram of reducing hematite, limonite, spathic iron ore.
Fig. 2 is the flash roaster synoptic diagram.
Specific embodiment: suspended preheater adopts 4 grades of cyclone preheaters 2,3,4,5; Every grade of cyclone preheater is made up of whirlwind tube and the pipeline that is attached thereto, the whirlwind tube adopts involute urve (scroll casing shape) import (the scroll casing shape import can reduce bump and the interference of inlet air flow to air-flow in the cylindrical shell), the air-flow width that enters cylindrical shell narrows down gradually, material is reduced to the distance that wall moves, and strengthened the distance of import tracheae and vapor pipe, reduce the short circuit chance of air-flow; The outlet of whirlwind tube is through the pipe connection of air valve and next stage.In hotblast stove 8 burnings, the high-temperature gas that hotblast stove 8 produces enters from flash roaster 6 bottoms through burner 9 for a certain amount of combustion gas and air; Simultaneously in order to control the content of CO in the flash furnace gases, flash stove inlet CO gas by valve to gas in CO replenish, make it can be stabilized in set(ting)value.The particulate chats at first feeds in the increase in pipeline of one-level whirlwind tube inlet, in pipeline, carry out sufficient heat exchange, then by one-level whirlwind tube gas and chats particle separation, the chats of accepting carries out the heat exchange second time in discharge tube enters the increase in pipeline of secondary whirlwind tube, separate through secondary whirlwind tube again, enter in the flash roaster 6 through three grades of whirlwind cylinder pre-heatings so successively and reduce, material after the reduction falls into rewinding tube 7 by level Four suspended preheater 5, obtains product (magnetite) after the shrend; Waste gas connects suspended preheater, dust-precipitator and vacuum fan 1 by the road discharges, and a part enters atmosphere, and another part is got back to the combustion chamber.
The above-mentioned product that obtains (magnetite) can obtain T after low intensity magnetic separation
Fe60% high grade iron concentrate.
The present invention can be used for the reducing roasting that difficulty is selected the chats of oxide mineral and these class mineral equally.
Claims (4)
1. the calciner of a reducing hematite, limonite or spathic iron ore, it is characterized in that: this device comprises suspended preheater, flash roaster (6), hotblast stove (8), vacuum fan (1), air valve, two plate valve, pipeline, suspended preheater is made up of 3～5 grades of cyclone preheaters of cross arrangement up and down, each whirlwind tube and the pipeline that is attached thereto form the one-level cyclone preheater, the outlet of whirlwind tube is equipped with air valve and two plate valve through the pipe connection of air valve and next stage at final stage whirlwind tube outlet pipe; The opening for feed (10) of flash roaster (6) and air outlet (11) respectively with the most last two stage cyclone preheater (4,5) pipe connection, the outlet of inlet mouth (13) and hotblast stove (8) is connected; One end of hotblast stove (8) is equipped with burner (9).
2. calciner according to claim 1, it is characterized in that: flash roaster (6) is made up of opening for feed (10), involute urve air outlet (11), cylindrical shell (12), involute urve inlet mouth (13), opening for feed (10) is coaxial with cylindrical shell (12) at cylindrical shell (12) top, cylindrical shell (12) is made up of the bottom of cylindrical top and inverted cone stage body, and involute urve air outlet (11) and involute urve inlet mouth (13) are gone up next side at cylindrical shell (12) respectively;
3. calciner according to claim 1 is characterized in that: the chopped-off head whirlwind tube import of suspension preheating is connected with vacuum fan (1) with dust-precipitator by pipeline, the logical atmosphere of vacuum fan (1) back one pipeline, and a loop leads to the combustion chamber.
4. calciner according to claim 1 is characterized in that: preheater is any in cyclone preheater, shaft preheater or the combined type preheating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100324843A CN100507011C (en) | 2006-10-30 | 2006-10-30 | Roasting device for reducing hematite, limonite or siderite |
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| CNB2006100324843A CN100507011C (en) | 2006-10-30 | 2006-10-30 | Roasting device for reducing hematite, limonite or siderite |
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| CN1945186A CN1945186A (en) | 2007-04-11 |
| CN100507011C true CN100507011C (en) | 2009-07-01 |
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| CNB2006100324843A Active CN100507011C (en) | 2006-10-30 | 2006-10-30 | Roasting device for reducing hematite, limonite or siderite |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386908B (en) * | 2007-09-11 | 2010-12-08 | 中国科学院过程工程研究所 | Magnetization roasting technique system for refractory iron ore powder and roasting technology |
| CN103031432B (en) * | 2011-09-30 | 2014-09-24 | 中国科学院过程工程研究所 | System for fluidized oxidizing/reducing roasting modification of titaniferous iron concentrate and roasting process |
| CN103031433B (en) * | 2011-09-30 | 2014-07-30 | 中国科学院过程工程研究所 | Fluidized oxidation roasting-fluidized reduction roasting system and roasting process for titaniferous iron concentrate |
| CN102382975B (en) * | 2011-10-31 | 2013-10-02 | 湖南长拓高科冶金有限公司 | Reduction roasting system of iron ore |
| CN103436691B (en) * | 2013-07-31 | 2015-01-28 | 中国地质科学院矿产综合利用研究所 | Fluidized magnetization reduction roasting device |
| CN104357651A (en) * | 2014-10-31 | 2015-02-18 | 成都利君实业股份有限公司 | Powder magnetization roasting and cooling system |
| CN106702157A (en) * | 2015-08-01 | 2017-05-24 | 江学艺 | Reduction treatment method and reduction treatment furnace for metal ore |
| CN105772216B (en) * | 2016-03-28 | 2017-12-01 | 东北大学 | A kind of new method that iron ore concentrate is produced with Refractory iron ore stone |
| CN108531719B (en) * | 2018-05-03 | 2020-04-03 | 东北大学 | High-phosphorus iron ore suspension state oxidation-reduction roasting-acid leaching dephosphorization method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2176192Y (en) * | 1993-11-27 | 1994-09-07 | 薛勇 | Effective assembled dry dust collector |
| CN2181338Y (en) * | 1994-02-28 | 1994-11-02 | 田新斌 | Film-wise separation cyclone scrubber |
| US5584910A (en) * | 1992-10-22 | 1996-12-17 | Pohang Iron & Steel Co., Ltd. | Process for producing molten pig iron or molten steel pre-products |
| CN2334495Y (en) * | 1998-07-10 | 1999-08-25 | 山川机床铸造厂研究所 | Adjustable fine dust pre-processor |
| CN2405173Y (en) * | 2000-01-31 | 2000-11-08 | 煤炭科学研究总院西安分院 | Calcine furnace |
| CN1776421A (en) * | 2005-12-01 | 2006-05-24 | 武汉理工大学 | Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore |
| CN1775368A (en) * | 2005-11-29 | 2006-05-24 | 武汉理工大学 | Cyclone suspension flash magnetized roasting-magnetic separating method for refractory ferric oxide ore |
-
2006
- 2006-10-30 CN CNB2006100324843A patent/CN100507011C/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5584910A (en) * | 1992-10-22 | 1996-12-17 | Pohang Iron & Steel Co., Ltd. | Process for producing molten pig iron or molten steel pre-products |
| CN2176192Y (en) * | 1993-11-27 | 1994-09-07 | 薛勇 | Effective assembled dry dust collector |
| CN2181338Y (en) * | 1994-02-28 | 1994-11-02 | 田新斌 | Film-wise separation cyclone scrubber |
| CN2334495Y (en) * | 1998-07-10 | 1999-08-25 | 山川机床铸造厂研究所 | Adjustable fine dust pre-processor |
| CN2405173Y (en) * | 2000-01-31 | 2000-11-08 | 煤炭科学研究总院西安分院 | Calcine furnace |
| CN1775368A (en) * | 2005-11-29 | 2006-05-24 | 武汉理工大学 | Cyclone suspension flash magnetized roasting-magnetic separating method for refractory ferric oxide ore |
| CN1776421A (en) * | 2005-12-01 | 2006-05-24 | 武汉理工大学 | Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore |
Non-Patent Citations (4)
| Title |
|---|
| 浅谈窑尾预热器的改进. 付世锦.水泥技术，第5期. 1997 |
| 浅谈窑尾预热器的改进. 付世锦.水泥技术，第5期. 1997 * |
| 采用气体悬浮焙烧技术改造老式回转窑. 桂康，江新民，郝百顺，高纯生.有色冶金节能，第5期. 2001 |
| 采用气体悬浮焙烧技术改造老式回转窑. 桂康，江新民，郝百顺，高纯生.有色冶金节能，第5期. 2001 * |
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Owner name: HU NAN CHANGTUO HIGH-TECH. METALLURGICAL CO., LTD. Free format text: FORMER OWNER: CHANGSHA RESEARCH INSTITUTE OF MINING AND METALLURGY CO., LTD. Effective date: 20120709 |
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Address after: Yuelu District City, Hunan province 410012 Changsha Lushan Road No. 966 Patentee after: Changsha Research Institute Of Mining And Metallurgy Ltd. Address before: Yuelu District City, Hunan province 410012 Changsha Lushan Road No. 966 Patentee before: Changsha Research Institute of Mining and Metallurgy |
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Effective date of registration: 20120709 Address after: 410005 Tang Dynasty mansion No. 435, Furong Road, Hunan, Changsha, 2601 Patentee after: HUNAN CHANGTUO GAOKE METALLURGY Co.,Ltd. Address before: Yuelu District City, Hunan province 410012 Changsha Lushan Road No. 966 Patentee before: Changsha Research Institute Of Mining And Metallurgy Ltd. |