CN1776421A - Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore - Google Patents
Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore Download PDFInfo
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- CN1776421A CN1776421A CN 200510019932 CN200510019932A CN1776421A CN 1776421 A CN1776421 A CN 1776421A CN 200510019932 CN200510019932 CN 200510019932 CN 200510019932 A CN200510019932 A CN 200510019932A CN 1776421 A CN1776421 A CN 1776421A
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Abstract
Structure of the testing device is as following: blower fan, gas generator, separator and reaction furnace are connected to each other through pipe; adjustable valve and switch valve are setup at pipe connected between the gas generator and the separator; material receiver is at lower part of the separator; the gas generator and reaction furnace are connected through pipe with switch valve; being setup at upper, middle, and lower part of the reaction furnace, the test points are in use for thermocouple to measure reduction gas in the furnace, temperature in furnace chamber and temperature of tail gas; through pipe with control valve, the bottom part of the reaction furnace is connected to the blower fan, and test points are in use for measuring flux of coal gas and component. Features are: low energy consumption; the testing device can be added to furnace and demount from furnace quickly, measuring reaction change velocity from weak magnetism to strong magnetism, etc.
Description
Technical field
The present invention relates to apparatus field, particularly a kind of difficulty is selected the proving installation of ferric oxide ore flash magnetization roasting reaction velocity.
Background technology
At present, not to be able to the main cause of full use be the mineral processing index that the hematite ore dressing is difficult to obtain to China's hematite stone.By the breakthrough of research new technology and device realization China hematite technique of preparing, be the key point of further utilizing China's hematite resource.The calcining magnetic separation method high advantage of index that possesses skills is considered to handle the most effectual way of low-grade refractory iron ore.But the ore grain size of used in the past reduction shaft furnace calcination process thick (75～15mm), the material magnetizing roast time long (about 1～2 hour), reduction process is slow, cause energy consumption and cost height, the efficient high intensity magnetic separation that was risen afterwards replaces in addition gradually, the hematite of part symbiosis component complexity, gangue is mainly in the majority to contain ferrosilicate, the physics of hematite and gangue mineral, chemical property (proportion, specific susceptibility, surface flotability etc.) close, adopt conventional beneficiation method then to be difficult to hematite is separated with gangue mineral, high intensity magnetic separation is also not all right, thereby magnetizing roast remains and handles the effective method of this part hematite.Cyclone suspension flash magnetizing roast-magnetic selection method selects ferric oxide ore grain or levigate high intensity magnetic separation chats in ore dressing process with the powdery difficulty; roasting under high temperature reduction atmosphere and cyclone suspension fluidization condition earlier; reaction time tapered to for tens seconds by dozens of minutes; but to concrete flash magnetization roasting time of the ferric oxide ore of different grain size, heterogeneity, temperature, atmospheric condition and corresponding treatment effect; must measure by testing laboratory; at present, the report that does not also have this type of testing apparatus both at home and abroad.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of difficulty to select ferric oxide ore flash magnetization roasting reaction velocity proving installation, this device will (3mm) difficulty selects ferric oxide ore to realize under fluidized state and in 5～100 seconds time that flash reduction magnetizing roast provides foundation for size fractionated, the flash magnetization roasting reaction time tapered to for tens seconds than the traditional handicraft reaction time by dozens of minutes, this device determination test sample ore roasting obtains qualified iron ore concentrate the fastest needed time and temperature conditions, thereby is that the problem that solves the prior art existence is cleared away the obstacles.
The technical solution adopted for the present invention to solve the technical problems is as follows:
Be provided with blower fan, producer gas generator, separation vessel and reacting furnace, they are communicated with by pipeline successively.On producer gas generator and pipeline that separation vessel is communicated with, be provided with variable valve and transfer valve, be provided with material receiver in the bottom of separation vessel.Be provided with the pipeline that is communicated with between producer gas generator and reacting furnace, this pipeline is provided with transfer valve.The bottom of reacting furnace is communicated with blower fan by pipeline, and this pipeline is provided with operation valve.Reacting furnace, its upper, middle and lower is provided with the test point that stove reducing gas, furnace chamber temperature and exhaust temperature are gone in thermocouple measurement, and its bottom is provided with flow apparatus measures gas flow and composition test point thereof.
The present invention compared with prior art has following remarkable result:
One. can guarantee that material is in the stable suspersion state under 600～850 ℃ high temperature, reducing atmosphere condition, realize the technology of rapid loading, quickly discharging material, the entire reaction time is in 100 seconds, and the conditional parameter of accurate recording reaction.
With Da Ye Iron Mine strong magnetic chats (TFe30～35%) is raw material, it mainly contains haematite, siderite, contain mineral such as ferrosilicate, can obtain the good mineral processing index of iron ore concentrate iron content 58～60%, iron recovery 82～86% through " flash magnetization roasting-low intensity magnetic separation " preliminary test.And the magnetizing roast reaction velocity is fast, only needs for 5～100 seconds.Find out that thus through after the magnetizing roast, the iron oxide mineral are reduced to magnetic iron ore substantially, after low intensity magnetic separation, iron concentrate grade significantly improves again.
They are two years old. and can realize that granular material suspension, adjustment, atmosphere are regulated, quick discharge under the nonoxidizing atmosphere, thank to the new device of material fast, can measure the powdered iron ore and under suspended state, realize Fe
2O
3(weak magnetic) is to Fe
3O
4(ferromagnetism) change reaction velocity.
They are three years old. and under the high temperature reduction atmospheric condition, this device can guarantee that tested material is under the situation of cyclone suspension state, adds apace in the times of number with second and draws off, and Fe is measured in research
2O
3(weak magnetic) is to Fe
3O
4The reaction velocity that (ferromagnetism) changes, this does not still have report at home and abroad.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
The present invention utilizes reducibility gas the haematite fluosolids roasting to be become the industrialization proving installation of magnetic iron ore under hot conditions.
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Structure of the present invention is as shown in the figure: be provided with the blower fan 1, producer gas generator 2, separation vessel 7 and the reacting furnace 4 that are communicated with by pipeline successively.On producer gas generator 2 and pipeline that separation vessel 7 is communicated with, be provided with variable valve 9 and transfer valve 10, be provided with material receiver 6 in the bottom of separation vessel 7.Be provided with the pipeline that is communicated with between producer gas generator 2 and reacting furnace 4, this pipeline is provided with transfer valve 3.The bottom of reacting furnace 4 is communicated with blower fan 11 by pipeline, and this pipeline is provided with operation valve 12.Transfer valve 3 is consistent with transfer valve 10 structures, and its switching can guarantee the stable of the interior gas flow of reacting furnace.Reacting furnace 4, its upper, middle and lower are provided with thermocouple measurement and go into the test point of stove reducing gas, furnace chamber temperature and exhaust temperature " T ", and its bottom is provided with flow apparatus measures gas flow and composition test point " Q " thereof.
Reacting furnace 4 can be made by the stainless steel 0Cr25Ni20 material of anti-1400 ℃ high temperature for the boiling reduction furnace, and furnace chamber is the cylindrical tube of φ 50mm, highly is 1800-2500mm.Pyrometer fire-end can be seated in the furnace chamber, and the temperature that records like this is placed on the temperature measured the furnace wall more near actual temperature than pyrometer fire-end, in and the temp measuring system temperature departure ± 5 ℃.Be provided with the electric furnace that is " well " word shape outside stove, the formed heat tape of electric furnace is positioned at the outer middle and lower part of stove, comprises air distribution plate 13.The heat tape height is 800-1200mm, and its effect is a temperature conditions of guaranteeing the roasting reaction.Air distribution plate 13 is contained in furnace bottom, and its effect is to make material be in fluidized state in pipe, and its pressure reduction is measured by differential manometer.Furnace roof portion is communicated with charge door 5 by pipeline, and this pipeline is provided with transfer valve 3; Switching between the transfer valve 3 and 10 is in order to guarantee gas flow stable before and after reinforced.This charge door is for hand stock, so that make system be in sealing state as far as possible.
Producer gas generator 2 is a fuel with coke or charcoal, with air be gasifying medium, produce reducibility gas based on CO, wherein the content of CO is realized by the air quantity of adjusting blower fan 1.
It below is the operation steps of this device
A. according to the size fractionated material, the version of design air distribution plate, under cold conditions, measure a certain amount of material the boiling height, be in air quantity, the air distribution plate pressure reduction of best fluidized state, as hot following operating basis;
B. start electric pit-type heating furnace, be warming up to temperature of reaction.
C. select the material of a kind of warp, weighing behind the analysis component.
D. according to system's gas composition, set the blow rate required (annotate: the air quantity that air quantity should adapt to selected particle diameter requires).
E. No. 3, No. 10 system valves and variable valve are opened entirely.(No. 3 system valves are transfer valve 3 control fluidized bed air distribution plates, and No. 10 system valve is transfer valve 10 control bypass air distribution plates, and variable valve is leftmost valve)
F. with the nitrogen cylinder valve open, feed nitrogen, air in the discharge system to system.
G. after one minute, close, press predetermined wind amount to system's gas delivery to close the nitrogen valve.
H. close system valve No. 2, regulate flow valve with reference to cold conditions flow value (with reference to flow-pressure differential table or curve), make flow reach the boiling requirement by the fluidized bed furnace air distribution plate according to particle diameter.
I. open system valve No. 10, close No. 3 system valves after, to the boiling furnace charge.
J. after reinforced, open system valve simultaneously No. 3, close No. 10 system valves after, pick up counting.
K. boiling time one arrives, and simultaneously opens system valve rapidly No. 10, close No. 3 system valves after, open the nitrogen valve discharging rapidly.
Brief description principle of work of the present invention once.
The principle of work of whole device: question response stove 4 is warming up to about 740 ℃, feed the weakly magnetic iron ore sample through charge door 5 by technological requirement, regulate coal gas tolerance, reducibility gas enters in the reacting furnace behind the electric heating system heat temperature raising, make sample ore in stove, be in fluidized state (suspension fluidized state), sample in the stove is carried out the fluidisation reduction roasting to obtain magnetic iron ore under little condition of negative pressure and weak reducing atmosphere, start each test point simultaneously and begin test job, after the roasting several seconds, cut off coal gas and fast blow out stove outside with the nitrogen of 1.2～1.8atm pressure stove internal magnet mineral material, enter in the water by material receiver 6, making it quenching becomes qualified magnetizing roast product, promptly obtains iron concentrate grade 〉=60%, the product of concentrate iron recovery 〉=80%.And waste gas is discharged by gas exhaust duct 8, guarantees that system is under stable little condition of negative pressure.
Producer gas generator 2 is used for producing reducibility gas, be passed in the reacting furnace 4 by the pipeline heating system, its principle of work is: by technological requirement, it is fuel that coke or charcoal are housed in the stove, keeps suitable coal seam height, regulates blower fan 1 and blasts air capacity, burning degree with control fuel, carbon monoxide content in the coal gas is met the demands, and guarantee not have the oxygen residue, the entire reaction system is in the reducing atmosphere all the time.Gas stove exit gas component range of control is seen attached list.The gas temperature that producer gas generator generated simultaneously remains on more than 600 ℃, can reduce the heating demand of heating tape Elema effectively, guarantees that flash magnetization roasting can carry out under satisfied test temperature.
Subordinate list
Gas stove exit gas component range of control
| Title | CO 2 | CO | O 2 | N 2 | Other |
| Component (V/%) | 3～26 | 0.5～15 | ≤0.5 | 55～62 | Surplus |
Claims (6)
1. a difficulty is selected the proving installation of ferric oxide ore flash magnetization roasting reaction velocity, and it is characterized in that: be provided with blower fan (1), producer gas generator (2), separation vessel (7) and reacting furnace (4), they are communicated with by pipeline successively; On producer gas generator (2) and pipeline that separation vessel (7) is communicated with, be provided with variable valve (9) and transfer valve (10), be provided with material receiver (6) in the bottom of separation vessel; Be provided with the pipeline that is communicated with between producer gas generator (2) and reacting furnace (4), this pipeline is provided with transfer valve (3); The bottom of reacting furnace (4) is communicated with blower fan (11) by pipeline, and this pipeline is provided with operation valve (12); Reacting furnace (4), its upper, middle and lower is provided with the test point that stove reducing gas, furnace chamber temperature and exhaust temperature are gone in thermocouple measurement, and its bottom is provided with flow apparatus measures gas flow and composition test point thereof.
2. proving installation according to claim 1 is characterized in that described reacting furnace (4), its stove be provided with outward be " well " word shape and can guarantee that roasting reacts the heat tape of needed temperature conditions, air distribution plate (13) is equipped with in its bottom.
3. proving installation according to claim 2 is characterized in that: heat tape is positioned at the middle and lower part of reacting furnace (4), comprises air distribution plate (13).
4. proving installation according to claim 1, it is characterized in that: the top of reacting furnace (4) is communicated with charge door (5) by pipeline, this pipeline is provided with transfer valve (3), and the switching between transfer valve (3) and (10) is in order to guarantee gas flow stable before and after reinforced.
5. according to claim 1 or 2 or 4 described proving installations, it is characterized in that: reacting furnace (4) is made by the stainless steel OCr25Ni20 material of anti-1400 ℃ high temperature.
6. proving installation according to claim 1, it is characterized in that: producer gas generator (2) is a fuel with coke or charcoal, air with 1.2～1.8atm pressure is a gasifying medium, produces the reducibility gas based on CO, and wherein the content of CO is realized by the air quantity of regulating blower fan (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200510019932 CN1776421A (en) | 2005-12-01 | 2005-12-01 | Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore |
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| CN 200510019932 CN1776421A (en) | 2005-12-01 | 2005-12-01 | Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507011C (en) * | 2006-10-30 | 2009-07-01 | 长沙矿冶研究院 | Roasting device for reducing hematite, limonite or siderite |
| CN101191149B (en) * | 2006-11-22 | 2010-05-12 | 中国科学院过程工程研究所 | Coal gasification-pore iron ore magnetic roasting coupling technique and device |
| CN103293177A (en) * | 2013-06-09 | 2013-09-11 | 中国科学院山西煤炭化学研究所 | Quick heating and gasifying test device and application thereof |
| CN104131158A (en) * | 2014-07-18 | 2014-11-05 | 黄石市新瑞环保科技有限公司 | Laminated circulating fluidized bed gasification-magnetization baking device and baking process |
| CN104914130A (en) * | 2014-03-10 | 2015-09-16 | 河北联合大学 | Small particle coke gasification reactivity determination method and small particle coke gasification reactivity determination apparatus |
| CN108504861A (en) * | 2017-02-27 | 2018-09-07 | 湖北凤山矿业有限公司 | A kind of method and device of direct reduction of iron ore iron |
| CN110057867A (en) * | 2019-04-18 | 2019-07-26 | 广西大学 | A kind of suspended state thermal analysis test device and test method |
| CN113176296A (en) * | 2021-03-31 | 2021-07-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Reoxidation test method for artificial magnetite |
-
2005
- 2005-12-01 CN CN 200510019932 patent/CN1776421A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507011C (en) * | 2006-10-30 | 2009-07-01 | 长沙矿冶研究院 | Roasting device for reducing hematite, limonite or siderite |
| CN101191149B (en) * | 2006-11-22 | 2010-05-12 | 中国科学院过程工程研究所 | Coal gasification-pore iron ore magnetic roasting coupling technique and device |
| CN103293177A (en) * | 2013-06-09 | 2013-09-11 | 中国科学院山西煤炭化学研究所 | Quick heating and gasifying test device and application thereof |
| CN103293177B (en) * | 2013-06-09 | 2015-03-25 | 中国科学院山西煤炭化学研究所 | Quick heating and gasifying test device and application thereof |
| CN104914130A (en) * | 2014-03-10 | 2015-09-16 | 河北联合大学 | Small particle coke gasification reactivity determination method and small particle coke gasification reactivity determination apparatus |
| CN104914130B (en) * | 2014-03-10 | 2017-08-15 | 河北联合大学 | A kind of assay method and device of little particle coke gasification |
| CN104131158A (en) * | 2014-07-18 | 2014-11-05 | 黄石市新瑞环保科技有限公司 | Laminated circulating fluidized bed gasification-magnetization baking device and baking process |
| CN108504861A (en) * | 2017-02-27 | 2018-09-07 | 湖北凤山矿业有限公司 | A kind of method and device of direct reduction of iron ore iron |
| CN110057867A (en) * | 2019-04-18 | 2019-07-26 | 广西大学 | A kind of suspended state thermal analysis test device and test method |
| CN110057867B (en) * | 2019-04-18 | 2024-01-12 | 广西大学 | Suspended state thermal analysis test device and test method |
| CN113176296A (en) * | 2021-03-31 | 2021-07-27 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Reoxidation test method for artificial magnetite |
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Owner name: WUHAN UNIV. OF SCIENCE AND ENGINEERING; APPLICANT Free format text: FORMER OWNER: WUHAN UNIV. OF SCIENCE AND ENGINEERING Effective date: 20060714 |
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Effective date of registration: 20060714 Address after: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 scientific research department of Wuhan University of Technology Applicant after: Wuhan University of Technology Co-applicant after: Huazhong University of Science and Technology Address before: 430070 Hubei Province, Wuhan city Hongshan District Luoshi Road No. 122 scientific research department of Wuhan University of Technology Applicant before: Wuhan University of Technology |
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