CN1945186A - Roasting device for reducing hematite, limonite and siderite - Google Patents
Roasting device for reducing hematite, limonite and siderite Download PDFInfo
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- CN1945186A CN1945186A CN 200610032484 CN200610032484A CN1945186A CN 1945186 A CN1945186 A CN 1945186A CN 200610032484 CN200610032484 CN 200610032484 CN 200610032484 A CN200610032484 A CN 200610032484A CN 1945186 A CN1945186 A CN 1945186A
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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 oxide ores such as bloodstone, limonite, siderite.
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 oxide ore iron ore and there is half to belong to difficulty in the iron ore gross reserves, quite a few hematite (bloodstone, siderite, 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 roast, making it change magnetic iron ore into to the complicated difficult ore dressing of this class of bloodstone, limonite, siderite, carry out and the separating of gangue mineral again, is effective separation method.But all the time, the technology of magnetizing roast and equipment fail to make a breakthrough, and scale can not effectively be controlled technological parameter after enlarging, and simultaneously, cost is higher.The reduction shaft furnace roaster 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 reduction roasting is handled thick (75～15mm), the material magnetizing roast time long (about 1～2h), reduction process is slow, energy consumption and cost height have all stopped producing.30 Φ 3.5m were once had in the former Soviet Union, 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 researcher above-mentioned chats to be made in advance the pelletizing of 5～10mm, send into rotary kiln and carry out magnetizing roast, and then carry out magnetic separation, can obtain good recovering effect, but technological 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 bloodstone, limonite, siderite 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 bloodstone, limonite, siderite is reduced into the calciner of magnetic iron ore.
Technical scheme of the present invention is: the reduction roasting device of bloodstone, limonite, siderite is made up of parts such as suspended preheater, flash roaster, air valve, pipeline, air exhauster and hot-blast 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 connected with the pipeline of next stage through air valve, at final stage whirlwind tube outlet air valve and two plate valve is housed; Flash roaster is made up of charging aperture, involute gas outlet (scroll casing shape outlet), cylindrical shell, involute air inlet (scroll casing shape import), charging aperture 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 gas outlet and involute air inlet be next side on cylindrical shell respectively; Flash roaster top charging aperture is connected with the most last two stage cyclone preheater pipeline respectively with the gas outlet, and the bottom air inlet is connected with the hot-blast stove outlet; One end of hot-blast stove is equipped with burner;
The import of chopped-off head whirlwind tube is connected with air exhauster with dust-precipitator by pipeline, the logical atmosphere of a pipeline behind the air exhauster, and a loop leads to the combustion chamber, to regulate the combustion chamber gas componant to setting 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 consersion unit-rotary kiln of investment, the mineral treating capacity improves greatly, and energy resource consumption significantly reduces, and production cost reduces significantly.With lower energy consumption and investment, finished of the conversion of oxide ores such as particulate bloodstone, limonite, siderite to magnetic iron ore, 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 oxide ore, fully reclaimed.
Description of drawings:
Fig. 1 is the calciner schematic diagram of reducing hematite, limonite, siderite.
Fig. 2 is the flash roaster schematic 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 (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 blast pipe, reduce the short circuit chance of air-flow; The outlet of whirlwind tube is connected with the pipeline of next stage through air valve.In hot-blast stove 8 burnings, the high-temperature gas that hot-blast 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 setting 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 duct enters the increase in pipeline of secondary whirlwind tube, separate through secondary whirlwind tube again, enter in the flash roaster 8 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 (magnetic iron ore) after the shrend; Waste gas connects suspended preheater, dust-precipitator and air exhauster (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 (magnetic iron ore) can obtain T after low intensity magnetic separation
Fe＞60% high grade iron concentrate.
The present invention can be used for the reduction 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, siderite, it is characterized in that: this device is made up of parts such as suspended preheater, flash roaster (6), hot-blast stove (8), air exhauster (1), air valve, two plate valve, pipelines; 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 connected with the pipeline of next stage through air valve, at final stage whirlwind tube outlet air valve and two plate valve is housed; The charging aperture (10) of flash roaster (6) is connected with the most last two stage cyclone preheater (4), (5) pipeline respectively with gas outlet (11), and air inlet (13) is connected with hot-blast stove (8) outlet; One end of hot-blast 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 charging aperture (10), involute gas outlet (11), cylindrical shell (12), involute air inlet (13), charging aperture (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 gas outlet (11) and involute air inlet (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 air exhauster (1) with dust-precipitator by pipeline, the logical atmosphere of air exhauster (1) back one pipeline, and a loop leads to the combustion chamber.
4. calciner according to claim 1 is characterized in that: preheater is a cyclone preheater, or any in shaft preheater and 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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| 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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|---|---|
| CN1945186A true CN1945186A (en) | 2007-04-11 |
| CN100507011C 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN102382975A (en) * | 2011-10-31 | 2012-03-21 | 湖南长拓高科冶金有限公司 | Reduction roasting system of iron ore |
| CN103031433A (en) * | 2011-09-30 | 2013-04-10 | 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 |
| CN103031432A (en) * | 2011-09-30 | 2013-04-10 | 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 |
| CN103436691A (en) * | 2013-07-31 | 2013-12-11 | 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 |
| CN105772216A (en) * | 2016-03-28 | 2016-07-20 | 东北大学 | Novel method for producing iron concentrates through complex refractory iron ore |
| WO2017020789A1 (en) * | 2015-08-01 | 2017-02-09 | 江学艺 | Metal ore metal recovery process and metal ore metal recovery process furnace |
| CN108531719A (en) * | 2018-05-03 | 2018-09-14 | 东北大学 | A kind of high-phosphorus iron ore suspended state redox roasting-acidleach dephosphorization method |
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| AT404735B (en) * | 1992-10-22 | 1999-02-25 | Voest Alpine Ind Anlagen | METHOD AND INSTALLATION FOR THE PRODUCTION OF LIQUID PIPE IRON OR LIQUID 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 |
| CN100493724C (en) * | 2005-11-29 | 2009-06-03 | 武汉理工大学 | Cyclone suspension flash magnetization roasting-magnetic separation method for refractory iron 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 |
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- 2006-10-30 CN CNB2006100324843A patent/CN100507011C/en active Active
Cited By (13)
| 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 |
| 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 |
| CN103031433A (en) * | 2011-09-30 | 2013-04-10 | 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 |
| CN103031432A (en) * | 2011-09-30 | 2013-04-10 | 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 |
| 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 |
| 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 |
| CN102382975A (en) * | 2011-10-31 | 2012-03-21 | 湖南长拓高科冶金有限公司 | Reduction roasting system of iron ore |
| CN103436691A (en) * | 2013-07-31 | 2013-12-11 | 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 |
| WO2017020789A1 (en) * | 2015-08-01 | 2017-02-09 | 江学艺 | Metal ore metal recovery process and metal ore metal recovery process furnace |
| CN105772216A (en) * | 2016-03-28 | 2016-07-20 | 东北大学 | Novel method for producing iron concentrates through complex refractory iron 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 |
| CN108531719A (en) * | 2018-05-03 | 2018-09-14 | 东北大学 | A kind of high-phosphorus iron ore suspended state redox roasting-acidleach dephosphorization method |
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|---|---|
| CN100507011C (en) | 2009-07-01 |
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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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Owner name: CHANGSHA RESEARCH INSTITUTE OF MINING AND METALLUR Free format text: FORMER NAME: CHANGSHA INST. OF MINING +. METALLURGY |
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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. |