CN103276193A - Method and device for preparing powdered iron through magnetizing low-iron red mud - Google Patents

Method and device for preparing powdered iron through magnetizing low-iron red mud Download PDF

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Publication number
CN103276193A
CN103276193A CN2013102473274A CN201310247327A CN103276193A CN 103276193 A CN103276193 A CN 103276193A CN 2013102473274 A CN2013102473274 A CN 2013102473274A CN 201310247327 A CN201310247327 A CN 201310247327A CN 103276193 A CN103276193 A CN 103276193A
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red mud
iron
roasting
low
preheating
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CN2013102473274A
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CN103276193B (en
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傅修文
高润贵
王秀
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Shandong Lu Ming high temperature materials Limited by Share Ltd
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SHANDONG LUMING HIGH-TEMPERATURE MATERIAL TECHNOLOGY Co Ltd
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Abstract

The invention discloses a method and a device for preparing powdered iron through magnetizing low-iron red mud, and belongs to the field of red mud processing process and equipment. The device is characterized by comprising a grate type roasting machine consisting of a roasting section, a preheating section and a drying section, and retaining walls are arranged among the three sections; the roasting section and the preheating section are connected with an air collecting pipe through an air passage; the air collecting pipe is communicated with a drying section through a fan and a blower pipeline; and a convey grate of the grate type roasting machine penetrates the roasting section, the preheating section and the drying section. According to the invention, a grate type low-temperature weak-reduction magnetizing roasting-wet-type weak-magnetic separation method is adopted for purifying low-iron red mud, and compared with the prior art, the method and the device have the advantages of being more energy-saving and economical, stable and high in production.

Description

Method and the device that low iron red mud prepares the smart powder of iron handled in magnetization
Technical field
The invention belongs to red mud treatment process and apparatus field, be specifically related to a kind of the magnetization and handle method and the device that low iron red mud prepares the smart powder of iron.
Background technology
Red mud is as the mine tailing of alumina industry, have low-grade, water content big, be difficult to characteristics such as processing.At present domestic overstocked low-grade red mud has several hundred million tons, and the red mud storage has not only taken a large amount of soils, and the red mud tailing dam also is particularly serious dangerous matter sources, careless slightlyly just can lead to tragedy.Simultaneously, the iron loss vector that has the red mud mine tailing to take away just has up to ten million tons every year.How to develop low-grade red mud, up to the present be still the domestic and international experts and scholars' of puzzlement a difficult problem.
But since full iron grade greater than 35% red mud in other industrial circle short run with addition of use, therefore can handle, just can't directly utilize and be lower than 35% red mud, thereby cause a large amount of overstockedly, pollute and waste.
At present, the processing mode of red mud has following several: the processing of desertifying, foam-formed processing, the additive of producing cement clinker, magnetizing roasting ore dressing, electric separation processing etc.Above processing mode, some because of the cost problem, some because of technical problem, some because of the production capacity problem, some is because of to problems such as red mud sole mass requirement, all be unrealized industrialization or large-scale production.
As a whole, the magnetizing roasting ore dressing is a kind of effective way of handling low iron red mud.The one, domestic had the comparatively proven technique that low grade hematite, limonite, spathic iron ore are handled in the magnetizing roasting ore dressing, and technical have a reference; The 2nd, the major product of this technology is fine iron breeze, is used for Iron and Steel Production, the recycling that has improved iron greatly; The 3rd, its byproduct both can be used for cement industry, also can be used for building material industry, can not produce the secondary mine tailing, had thoroughly solved mine tailing and had handled a difficult problem of bringing.Problem is, present magnetizing roasting ore-dressing technique has plenty of the cost height, and production capacity is low; Having plenty of technology, to control difficulty big, causes with short production cyclely, and the production poor continuity forms restriction to large-scale industrial production.Particularly red mud is handled, it is very incompatible that present processing unit configuration etc. also seems, this is on the one hand because red mud self physical properties (moisture is big, viscosity is big) causes, be because the needed temperature of red mud magnetizing roasting is lower on the other hand, easier formation low melting point, causing producing can not the continous-stable operation.
In view of the foregoing, the applicant, has proposed a kind of novel processing purification processes device and method to low iron red mud, and has been successfully applied to suitability for industrialized production in conjunction with production experience for many years by research.
Summary of the invention
Technical problem to be solved by this invention provides a kind of the magnetization and handles method and the device that low iron red mud prepares the smart powder of iron, can will hang down the magnetic separation of iron red mud and purify under the low-temperature bake condition.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of the magnetization to handle the method that low iron red mud prepares the smart powder of iron, it is characterized in that processing step is as follows:
(1) will hang down the reductive agent granulation that adding accounts for total mass mark 3% in the iron red mud;
(2) with the material cloth of granulating and forming to the formula burning machine of combing, bed thickness 200mm;
(3) material roasting in comb formula burning machine, maturing temperature is lower than 700 ℃, and material does not have relative movement during roasting;
(4) material that roasting is good is discharged by exhaust end, carries out shrend, carries out magnetic separation then and separates, and finishes purification process.
A kind of magnetization of the present invention handled the method that low iron red mud prepares the smart powder of iron, it is characterized in that reductive agent adopts brown coal or the soft coal of fixed carbon content 40%, the mol ratio C/O=0.9 of fixed carbon content and total oxygen-0.95 in the reductive agent.
Roasting comprises roasting stage, pre-heating stage and drying stage three phases, and the maturing temperature of above-mentioned three phases is respectively 650 ℃-680 ℃, 550 ℃, 250 ℃.
Low iron red mud refers to that full iron grade is lower than 35% red mud.
The invention provides a kind of the magnetization and handle the device that low iron red mud prepares the smart powder of iron, it is characterized in that comprising comb formula burning machine, comb formula burning machine comprises firing section, preheating section and three parts of dryer section, between firing section, preheating section and the dryer section barricade is set; Firing section is connected effuser with preheating section by air flue, and effuser is by blower fan and blower fan pipeline UNICOM dryer section; The conveying comb bed of comb formula burning machine runs through firing section, preheating section and dryer section.
A kind of magnetization of the present invention handled the device that low iron red mud prepares the smart powder of iron, it is characterized in that the maturing temperature of firing section, preheating section and dryer section is respectively 650 ℃-680 ℃, 550 ℃, 250 ℃.
Also comprise the Boiling Combustion device, the Boiling Combustion device connects firing section by hot exhaust gases passes.
Also comprise cleaning apparatus, cleaning apparatus one end UNICOM dryer section, the cleaning apparatus the other end is by dedusting fan UNICOM chimney.
The invention has the beneficial effects as follows:
1. because the granularity very thin (325 order content are greater than 90%) of low iron red mud, before carrying out roasting, must carry out granulation earlier, and the intensity of this raw material granulation is very poor, in traditional roasting apparatus the inside efflorescence easily, this easily causes material bonding on the one hand, production can't run well continuously, because the material segregation causes the interior temperature of roasting device extremely unstable, roasting effect is poor on the other hand.After adopting this kind technology, the roasting process of material becomes stationary state by kinestate, has avoided efflorescence and the segregation phenomena of material fully, has guaranteed the continuous long-term operation of roasting effect and production.
2. because the maturing temperature of low iron position red mud is low, and there is the requirement height to fuel in traditional type of heating, and cost is big, controls difficulty, the production adjustment is slow, problems such as temperature shakiness, and particularly under 700 ℃ of low temperature, traditional production technique and type of heating are difficult to control.And after adopting this kind device and technology, control simply, and produce and adjust soon, to demanded fuel low (coal-fired Q low 〉=4500Kcal get final product), cost is low, can guarantee the continuous run in long period of producing.
3. traditional treatment process, power consumption height (about 70KWh/t product), and after adopting this technology, power consumption reduces the about 40KWh/t product of 40%(), benefit is higher.
4. this technology and traditional sinter process ratio, technical process is short, and burnup is low.(traditional technology burnup 2700KJ/ ton raw material, novel process burnup 1800KJ/ ton raw material)
5. reasonable for guaranteeing temperature distribution, set up the twice partition wall in comb formula burning machine inside, wherein the hot waste gas of firing section and preheating section converges in the effuser, is extracted out by blower fan and sends into dryer section; The waste gas of dryer section is sent into smoke stack emission by dedusting fan after dedusting, about 80 ℃ of discharging flue-gas temperatures, and the hot flue gas heat that efficient Boiling Combustion device produces is fully used.
Description of drawings
Fig. 1 is that the apparatus structure synoptic diagram (solid arrow has reflected the trend that hot flue gas recirculation utilizes among the figure) that hangs down the iron red mud and prepare the smart powder of iron is handled in magnetization;
Fig. 2 is that the method process flow sheet that low iron red mud prepares the smart powder of iron is handled in magnetization;
Among the figure: 1, blower fan; 2, effuser; 3, air flue; 4, Boiling Combustion device; 5, hot exhaust gases passes; 6. firing section; 7, preheating section; 8, dryer section; 9, cleaning apparatus; 10, dedusting fan; 11, chimney; 12, blower fan pipeline.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment one
As shown in Figure 1, a kind of magnetization handled the device that low iron red mud prepares the smart powder of iron, and its core component is comb formula burning machine, and comb formula burning machine comprises firing section 6, preheating section 7 and 8 three parts of dryer section, between firing section 6, preheating section 7 and the dryer section 8 barricade is set.Firing section 6 is connected effuser 2 with preheating section 7 by air flue 3, and effuser 2 is by blower fan 1 and blower fan pipeline 12 UNICOM's dryer section 8; The conveying comb bed of comb formula burning machine runs through firing section 6, preheating section 7 and dryer section 8.The maturing temperature of firing section 6, preheating section 7 and dryer section 8 is respectively 650 ℃, 550 ℃, 250 ℃.
Boiling Combustion device 4 connects firing section 6 by hot exhaust gases passes 5.
Cleaning apparatus 9 one end UNICOM dryer section 8, cleaning apparatus 9 the other ends are by dedusting fan 10 UNICOM's chimneys 11.
As shown in Figure 2, a kind of magnetization of the present invention handled the method that low iron red mud prepares the smart powder of iron, it is characterized in that processing step is as follows:
(1) full iron grade is lower than 35% low iron red mud and adds the reductive agent granulation that accounts for total mass mark 3%.Reductive agent adopts brown coal or the soft coal of fixed carbon content 40%, the mol ratio C/O=0.9 of fixed carbon content and total oxygen in the reductive agent.
(2) with the material cloth of granulating and forming to the formula burning machine of combing, bed thickness 200mm.
(3) material roasting in comb formula burning machine, maturing temperature is lower than 700 ℃.
Roasting comprises roasting stage, pre-heating stage and drying stage three phases, and the maturing temperature of above-mentioned three phases is respectively 650 ℃, 550 ℃, 250 ℃.Material does not have relative movement during roasting.
(4) material that roasting is good is discharged by exhaust end, carries out shrend, carries out magnetic separation then and separates, and finishes purification process.
Because it has been ripe prior art that magnetic separation separates, after its material after with shrend grinds, through selected and roughly select, material is divided into concentrate and tailings, concentrate can be used for steel-making ironmaking by dehydration, and can be used for cement or building material industry behind the tailings dewatering.
The low-grade red mud suitability for industrialized production result of the large-scale aluminium manufacturer in Yantai, Shandong
(1) sales revenue estimation
First phase day is handled 3300 tons of raw materials (2500 tons of butts), scaling loss is calculated according to 5%, 2375 tons of magnetites of output, the smart powder of 54% above iron can be selected in this ore deposit, and choosing is than 4.63:1, and the ore deposit marketable value of hanking does not contain 550 yuan of taxes/dried ton, select 512.96 tons of quantity, day is sold 28.21 ten thousand yuan of incomes, according to 300 working days of year, and 8463.84 ten thousand yuan of annual sales revenues.
(2) cost estimation
Raw material: coal does not contain tax for 650 yuan/ton, 0.8 yuan/degree of the electricity charge, artificial 60 people, 3000 yuan of average salaries.Butt coal consumption 7%, the installation total volume is 1800 kilowatts.
Day is consumed 11.37 ten thousand yuan of coals, and 2.0 ten thousand yuan of day power consumptions, 0.5 ten thousand yuan of every days such as machinery, oil plant, maintenance, add up to 14.47 ten thousand yuan of day production costs by artificial 0.6 ten thousand yuan.4,341 ten thousand yuan of year production costs.Current assets needs 5,000,000 yuan according to measuring and calculating in 30 days.4122.84 ten thousand yuan of annual returns.
Mine tailing is sold 10 yuan/wet ton, and year 73.5 ten thousand wet tons are worth 7,350,000 yuan.Add up to 4,857 ten thousand yuan of profits.
Embodiment two
The maturing temperature of firing section 6 is respectively 680 ℃, and corresponding, material is respectively 680 ℃ at the maturing temperature in roasting stage.Reductive agent adopts brown coal or the soft coal of fixed carbon content 40%, the mol ratio C/O=0.95 of fixed carbon content and total oxygen in the reductive agent.The other technologies feature is identical with embodiment one, does not repeat them here.
Embodiment three
The maturing temperature of firing section 6 is respectively 660 ℃, and corresponding, material is respectively 660 ℃ at the maturing temperature in roasting stage.Reductive agent adopts brown coal or the soft coal of fixed carbon content 40%, the mol ratio C/O=0.92 of fixed carbon content and total oxygen in the reductive agent.The other technologies feature is identical with embodiment one, does not repeat them here.
It is pointed out that above-mentioned embodiment only is the preferred embodiment of the invention, for those skilled in the art, meeting under the prerequisite of principle of work of the present invention, any be equal to or similar replacement all falls within the scope of protection of the present invention.

Claims (8)

1. one kind magnetizes the method that the low iron red mud of processing prepares the smart powder of iron, it is characterized in that processing step is as follows:
(1) will hang down the reductive agent granulation that adding accounts for total mass mark 3% in the iron red mud;
(2) with the material cloth of granulating and forming to the formula burning machine of combing, bed thickness 200mm;
(3) material roasting in comb formula burning machine, maturing temperature is lower than 700 ℃, and material does not have relative movement during roasting;
(4) material that roasting is good is discharged by exhaust end, carries out shrend, carries out magnetic separation then and separates, and finishes purification process.
2. the method that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 1, it is characterized in that reductive agent adopts brown coal or the soft coal of fixed carbon content 40%, the mol ratio C/O=0.9 of fixed carbon content and total oxygen-0.95 in the reductive agent.
3. the method that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 2, it is characterized in that roasting comprises roasting stage, pre-heating stage and drying stage three phases, the maturing temperature of above-mentioned three phases is respectively 650 ℃-680 ℃, 550 ℃, 250 ℃.
4. the method that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 3, it is characterized in that low iron red mud refers to that full iron grade is lower than 35% red mud.
5. handle the device that low iron red mud prepares the smart powder of iron according to claim 1 or 2 or 3 or 4 or 5 described magnetization, it is characterized in that comprising comb formula burning machine, comb formula burning machine comprises firing section, preheating section and three parts of dryer section, between firing section, preheating section and the dryer section barricade is set; Firing section is connected effuser with preheating section by air flue, and effuser is by blower fan and blower fan pipeline UNICOM dryer section; The conveying comb bed of comb formula burning machine runs through firing section, preheating section and dryer section.
6. the device that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 5, it is characterized in that the maturing temperature of firing section, preheating section and dryer section is respectively 650 ℃-680 ℃, 550 ℃, 250 ℃.
7. the device that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 6, it is characterized in that also comprising the Boiling Combustion device, and the Boiling Combustion device connects firing section by hot exhaust gases passes.
8. the device that low iron red mud prepares the smart powder of iron is handled in magnetization according to claim 7, it is characterized in that also comprising cleaning apparatus, cleaning apparatus one end UNICOM dryer section, and the cleaning apparatus the other end is by dedusting fan UNICOM chimney.
CN201310247327.4A 2013-06-21 2013-06-21 Method and device for preparing powdered iron through magnetizing low-iron red mud Expired - Fee Related CN103276193B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103966421A (en) * 2014-04-23 2014-08-06 邢台职业技术学院 Comprehensive recovery method of ferrous metallurgical solid wastes
CN104878194A (en) * 2015-06-23 2015-09-02 长安大学 Treatment method for recovering iron from sintered red mud
CN107385197A (en) * 2017-07-17 2017-11-24 长沙紫宸科技开发有限公司 A kind of resource utilization method of red mud
CN108866318A (en) * 2018-07-02 2018-11-23 深圳市中金环保科技有限公司 A method of low-cost high-efficiency separates iron compound from red mud

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677309A (en) * 1979-11-29 1981-06-25 Mitsui Arumina Seizo Kk Recovery method of iron ore raw material from red mud
CN101538632A (en) * 2009-02-05 2009-09-23 丁家伟 Preparation process and device of sponge iron
CN101643837A (en) * 2009-06-26 2010-02-10 中冶长天国际工程有限责任公司 Pre-heating device and pre-heating method of sulfate slag pellet ore
JP2011088063A (en) * 2009-10-22 2011-05-06 Jfe Steel Corp Method of separating iron-making slag
CN102268536A (en) * 2011-08-17 2011-12-07 梁玉麟 Rapid reduction roasting furnace for red mud and roasting method suitable for same
CN102626670A (en) * 2012-04-28 2012-08-08 北京科技大学 Method for preparing high purity iron ore by reducing and magnetizing red mud in rotary kiln
CN102876882A (en) * 2012-10-12 2013-01-16 北京科技大学 Method for recovering iron from rare-earth tailings and producing high-grade fine iron powder
CN103074484A (en) * 2013-01-16 2013-05-01 北京矿冶研究总院 Method for comprehensively treating phosphorus-containing oolitic hematite and red mud

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5677309A (en) * 1979-11-29 1981-06-25 Mitsui Arumina Seizo Kk Recovery method of iron ore raw material from red mud
CN101538632A (en) * 2009-02-05 2009-09-23 丁家伟 Preparation process and device of sponge iron
CN101643837A (en) * 2009-06-26 2010-02-10 中冶长天国际工程有限责任公司 Pre-heating device and pre-heating method of sulfate slag pellet ore
JP2011088063A (en) * 2009-10-22 2011-05-06 Jfe Steel Corp Method of separating iron-making slag
CN102268536A (en) * 2011-08-17 2011-12-07 梁玉麟 Rapid reduction roasting furnace for red mud and roasting method suitable for same
CN102626670A (en) * 2012-04-28 2012-08-08 北京科技大学 Method for preparing high purity iron ore by reducing and magnetizing red mud in rotary kiln
CN102876882A (en) * 2012-10-12 2013-01-16 北京科技大学 Method for recovering iron from rare-earth tailings and producing high-grade fine iron powder
CN103074484A (en) * 2013-01-16 2013-05-01 北京矿冶研究总院 Method for comprehensively treating phosphorus-containing oolitic hematite and red mud

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
梅贤恭等: "内配煤高铁赤泥团块直接还原制备海绵铁的研究", 《第三届全国轻金属冶金学术会议论文集》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103966421A (en) * 2014-04-23 2014-08-06 邢台职业技术学院 Comprehensive recovery method of ferrous metallurgical solid wastes
CN104878194A (en) * 2015-06-23 2015-09-02 长安大学 Treatment method for recovering iron from sintered red mud
CN107385197A (en) * 2017-07-17 2017-11-24 长沙紫宸科技开发有限公司 A kind of resource utilization method of red mud
CN108866318A (en) * 2018-07-02 2018-11-23 深圳市中金环保科技有限公司 A method of low-cost high-efficiency separates iron compound from red mud

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