CN108330273A - A kind of iron ore roasting Magnitizing method and equipment - Google Patents
A kind of iron ore roasting Magnitizing method and equipment Download PDFInfo
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- CN108330273A CN108330273A CN201810425187.8A CN201810425187A CN108330273A CN 108330273 A CN108330273 A CN 108330273A CN 201810425187 A CN201810425187 A CN 201810425187A CN 108330273 A CN108330273 A CN 108330273A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 11
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000006722 reduction reaction Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 82
- 239000000843 powder Substances 0.000 claims description 54
- 238000010438 heat treatment Methods 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 50
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 49
- 239000011707 mineral Substances 0.000 claims description 49
- 238000006243 chemical reaction Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 34
- 239000002817 coal dust Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000003245 coal Substances 0.000 claims description 11
- 230000017525 heat dissipation Effects 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 239000006148 magnetic separator Substances 0.000 claims description 7
- 230000002441 reversible effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000007885 magnetic separation Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000003325 tomography Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005415 magnetization Effects 0.000 abstract description 5
- 229910021646 siderite Inorganic materials 0.000 abstract description 5
- 239000012141 concentrate Substances 0.000 abstract description 2
- 238000000227 grinding Methods 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 7
- 229910001608 iron mineral Inorganic materials 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910000015 iron(II) carbonate Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/005—Pretreatment specially adapted for magnetic separation
- B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to the roasting magnetization technology fields of iron ore, for a kind of iron ore roasting Magnitizing method and equipment, the roasting Magnitizing method feeds intake by preliminary grinding, proportioning, match air inlet and inversely supplied gas, spiral type heated, char combustion reactive combustion, Iron Ore Powder from heated, waterfall type flash reduction reaction, be quickly cooled down the technical matters such as fixed and form, make the Fe without magnetism2O3It is reduced into magnetic Fe3O4.Realize that nonmagnetic iron ore such as bloodstone, limonite, siderite etc. is rapidly converted into the iron ore that is magnetic, the concentrate grade for improving iron ore reaches 65% or more, and the rate of recovery reaches 90% or more, to which the utilization rate of iron ore resource be greatly improved.
Description
Technical field
The present invention relates to the roasting magnetization technology field of iron ore, specially a kind of iron ore roasting Magnitizing method and set
It is standby.
Background technology
It is the Fe made in iron mineral to roast magnetized principle all2O3Or FeCO3It is produced with H, O and CO under high ambient conditions
Biochemical reaction generates magnetic iron mineral Fe3O4, so that refractory iron ore object is converted to and easily select iron mineral, to improve iron ore
The utilization ratio of resource.Roasting reduction chemical equation：
Roasting magnetization is general to select coal and air to make reaction raw materials, and the C in coal is first reacted with the O in air, is generated CO, is
The Fe of iron ore2O3Reduction reaction provides reducing agent：
C oxidation reaction chemical formulas：
Fe2O3Reduction reaction chemical formula：
Bloodstone, limonite：
Siderite：
In the prior art, Mineral Processing Enterprises mainly roast magnetic using rotary kiln baking magnetization technology and floated Flash Smelting Furnace
Change technology.Both equipment and technology all Shortcomings.
For rotary kiln since iron ore material size is thick (about 75mm-20mm), roasting time grows (about 1-3h), H, O when reaction
It cannot be penetrated into inside ore particle completely with CO, cause reaction incomplete；Due to the bad control of end flue temperature, often because of high temperature
(1100 DEG C or more) make nonmetalloid dissolving in material be bonded again with iron ore, and forming ring formation and ore particle can not dissociate again
Choosing；Since the reduction reaction and oxidation reaction of (570 DEG C or more) iron ore under high ambient conditions are reversible, and rotary kiln
There is no other devices to make the iron ore material reacted and air exclusion after having crossed burner, keeps the iron ore grain for just reacting completion sudden and violent
Dew in air, and is combined with the O in air generate Fe rapidly2O3, cause the iron ore grain magnetic susceptibility of rotary kiln baking not high, return
Yield is not high, and energy consumption is also high.
Floated Flash Smelting Furnace is that coal is first generated to water-gas after-blow and is fired to combustion chamber by the way that iron mineral is worn into dry powder in advance
It burns, generates high-temperature mixed gas, form high temperature, high pressure mixed gas under the action of high pressure blower, drive iron mineral dry powder
It suspends and raises up in reaction tube, Fe during suspension raises up in Iron Ore Powder2O3Or FeCO3With H, O in high-temperature mixed gas
Chemical reaction is generated with CO, generates magnetic iron mineral Fe3O4.Although floated Flash Smelting Furnace has well solved rotary kiln anti-
Should not exclusively, back reaction the problems such as, but construct complicated, disposable investment big (at least 50,000,000 yuan or more), high energy consumption
(combustion reaction is carried out with reduction reaction segmentation, and heat loss is big；Overcome gravity that mineral material raises up 10m or more), so it is more
It is promoted not open always over year.
Invention content
The purpose of the present invention is to provide a kind of iron ore roasting Magnitizing method and equipment, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides the following technical solutions：
A kind of iron ore roasting Magnitizing method：Non-magnetic iron ore, coal are dry grinded respectively to 160~200 mesh, root in advance
According to the iron ore chemical reaction amount and specific heat capacity of measured in advance, the inlet amount of coal dust and Iron Ore Powder is controlled by parameters adjusting, through equal
It is even mix it is mixed after form mixed mineral feed powder；Mixed mineral feed powder is launched to heating on the spiral heating panel of heating zone, coal dust
H is released in heated journey2O、O2、H2Equal gases are added in mixed gas；When coal dust is heated to 300 DEG C or more,
Coal dust is ignited, and the O in the C and mixed gas in coal dust generates oxidation reaction, generates CO, CO2Gas, while C burning releases
The heat gone out is mixed the Iron Ore Powder in mineral material and absorbs, and the temperature of Iron Ore Powder is made to quickly rise to 570 DEG C or more；High temperature mixes
The continuation of mineral feed powder is moved downwardly on the spiral staggered floor panel of reaction zone along spiral panel, by waterfall type several times from
It is shaken loose by falling, makes the Fe in Iron Ore Powder2O3It is come into full contact with H, O and CO in mixed gas, reduction reaction occurs, generated
Fe3O4And H2O；The mixed mineral feed powder that reduction reaction is completed continues the spiral shell being moved downwardly into along spiral panel to cooling zone
It revolves in cooling surface plate, Iron Ore Powder temperature is made to rapidly drop to 570 DEG C hereinafter, Fe in Iron Ore Powder3O4It is completely fixed after being cooled down and does not send out
Raw back reaction；Mixed mineral feed powder is transported on weak magnetic separator after the collection of mineral feed powder collector and carries out magnetic separation.It is synchronous to carry out
Be to control air inflow by adjusting gas inlet valve and air inlet valve, after mixing blower mixes pressurization enter heating
Area is heated along the downward reverse flow of heating coil panel in flow process, the C in O and composite ore material in mixed gas
Oxidation reaction first occurs, generates and contains CO and CO2Mixed gas, and continue along spiral panel to flow down to reaction zone, and it is mixed
Close the Fe in mineral feed powder2O3Reduction reaction occurs, generates Fe3O4 and H2O；Mixed gas becomes exhaust gas after completing reaction, passes through
Enter exhaust gas drainage tube after the cooling of supercooling area, flows back into air entrance end and be used again.
A kind of iron ore roasting magnetizing equipment, mainly by feed system, gas handling system, discharging system and insulating cover and
Circulating cooling system forms, wherein feed system includes coal dust inlet valve, Iron Ore Powder inlet valve, mineral material powder stirrer, air inlet
System includes gas inlet valve, air inlet valve, mixing blower, and discharging system includes mineral feed powder collector, exhaust gas drainage
It manages, is equipped with heating zone, reaction zone, cooling zone, coal dust inlet valve, Iron Ore Powder inlet valve and mine in insulating cover successively from top to bottom
Material powder stirrer is connected to, and mineral material powder stirrer is connected to hot zone cap feed inlet, gas inlet valve, air inlet valve and
Mixing blower is connected to, and mixing blower air outlet is connected to hot zone cap air inlet, and spiral heating face is equipped in heating zone
Plate；Spiral staggered floor panel is equipped in reaction zone；Spiral cooling surface plate is equipped in cooling zone；The spiral staggered floor panel respectively with spiral shell
It is connected to revolve heating panel, spiral cooling surface plate, bottom is equipped with mineral feed powder collector in insulating cover, and mineral feed powder is received
Weak magnetic separator is communicated to outside storage；In insulating cover gas inlet valve is communicated to outside bottom exhaust gas drainage tube.
Preferably, the spiral heating panel of heating zone includes spiral panel, and it is in M shapes that several groups are inlayed in the spiral panel
The high temperature resistance silk of distribution, the temperature resistance wire external power supply and temperature controller.
Preferably, the spiral staggered floor panel of reaction zone presses 30 °~90 ° staggered floor assembly by spiral panel, it is formed with 10~
Several tomographies of 15cm drops.
Preferably, the spiral cooling surface plate of cooling zone includes spiral panel, and it is in M shapes that several groups are inlayed in the spiral panel
The heat dissipation pipe of distribution, heat dissipation pipe's water inlet are connected to high-pressure hydraulic pump by cooling zone water inlet pipe, and high-pressure hydraulic pump water inlet connects
Logical radiator, water inlet of radiator are connected to by cooling zone outlet pipe with heat dissipation pipe, and closed circulation cooling system is formed.
Preferably, coal dust inlet valve, Iron Ore Powder inlet valve connect controller by electronic sensor.
Preferably, gas inlet valve, air inlet valve connect controller by electronic sensor.
Preferably, several high-frequency vibrations are installed at spiral heating panel, spiral staggered floor panel, the spiral cooling surface plate back side
Device.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) it can be thus achieved with the place of seldom investment and very little and be previously required to huge investment and could solve to wide field very much
Iron ore roasting certainly magnetizes problem.
(2) due to being integrated with electronic induction, controller (system), gas, coal, iron ore that participation is reacted is made all to be able to essence
It really launches, reduces the discharge of pollutant.
(3) it due to being to generate heat self using the movement of gravity nature and composite ore material of mineral material, greatly drops
Low energy consumption, 60% or more energy consumption is reduced than traditional rotary kiln, and 30% or more energy consumption is reduced than floated Flash Smelting Furnace.
(4) it is achieved that conversion of the nonmagnetic iron ore to the iron ore that is magnetic with less investment and energy consumption, makes China
A large amount of refractory iron ore (such as bloodstone, limonite, siderite) becomes good choosing easily choosing, and China's iron ore can be greatly improved
The utilization ratio of stone resource has strategic economic value meaning.
Description of the drawings
Fig. 1 is the iron ore roasting magnetizing equipment schematic diagram of the present invention；
Fig. 2 is the heating zone spiral heating panel resistance silk schematic wiring diagram of the present invention；
Fig. 3 is cooling zone helix cooling panel heat dissipation pipe's schematic wiring diagram of the present invention.
In figure：1 coal dust inlet valve, 2 Iron Ore Powder inlet valves, 3 mineral material powder stirrers, 4 gas inlet valves, 5 air inlets
Valve, 6 mixing blowers, 7 insulating covers, 8 heating zones, 9 spiral heating panels, 10 reaction zones, 11 spiral staggered floor panels, 12 coolings
Area, 13 spiral cooling surface plates, 14 mineral feed powder collectors, 15 exhaust gas drainage tubes, 16 cooling zone water inlet pipes, the water outlet of 17 cooling zones
Pipe, 18 radiators, 19 high-pressure hydraulic pumps.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
~3 are please referred to Fig.1, the present invention provides a kind of technical solution：
A kind of iron ore roasting Magnitizing method：Non-magnetic iron ore, coal are dry grinded respectively to 160~200 mesh, root in advance
According to the iron ore chemical reaction amount and specific heat capacity of measured in advance, the inlet amount of coal dust and Iron Ore Powder is controlled by parameters adjusting, through equal
It is even mix it is mixed after form mixed mineral feed powder；Mixed mineral feed powder is launched to heating on the spiral heating panel 9 of heating zone 8, coal
Powder releases H in heated journey2O、O2、H2Equal gases are added in mixed gas；When coal dust is heated to 300 DEG C or more
When, coal dust is ignited, and the O in the C and mixed gas in coal dust generates oxidation reaction, generates CO, CO2Gas, while C burnings are released
The heat of releasing is mixed the Iron Ore Powder in mineral material and absorbs, and the temperature of Iron Ore Powder is made to quickly rise to 570 DEG C or more (Iron Ore Powders
Middle Fe2O3The hot conditions needed for reduction reaction occur)；The continuation of high temperature mixed mineral feed powder is moved downwardly into along spiral panel
Onto the spiral staggered floor panel 11 of reaction zone 10, is shaken loose by the free falling of waterfall type several times, make the Fe in Iron Ore Powder2O3With
H, O and CO in mixed gas come into full contact with, and reduction reaction occurs, and generate Fe3O4And H2O；The composite ore of reduction reaction is completed
The continuation of material powder is moved downwardly into along spiral panel onto the spiral cooling surface plate 13 of cooling zone 12, keeps Iron Ore Powder temperature quick
Drop to 570 DEG C hereinafter, Fe in Iron Ore Powder3O4It is completely fixed after being cooled down and back reaction does not occur；Mixed mineral feed powder is (mainly
Fe3O4) be transported on weak magnetic separator after the collection of mineral feed powder collector 14 and carry out magnetic separation.Synchronous progress is useless by adjusting
Gas intake valve 4 and air inlet valve 5 control air inflow, pressurize after the mixing of mixing blower 6 and enter heating zone 8, along heating
The downward reverse flow of spiral panel is heated in flow process, and oxygen first occurs for the C in O and composite ore material in mixed gas
Change reaction, generates and contain CO and CO2Mixed gas, and continue along spiral panel to flow down to reaction zone 10, with mixed mineral
Fe in feed powder2O3Reduction reaction occurs, generates Fe3O4And H2O；Mixed gas becomes exhaust gas after completing reaction, through supercooling
Area 12 enters exhaust gas drainage tube 15 after cooling down, and flows back into air entrance end and is used again.
A kind of iron ore roasting magnetizing equipment, mainly by feed system, gas handling system, discharging system and insulating cover 7
It is formed with circulating cooling system, wherein feed system includes coal dust inlet valve 1, Iron Ore Powder inlet valve 2, mineral material powder stirrer
3, gas handling system includes gas inlet valve 4, air inlet valve 5, mixing blower 6, and discharging system includes mineral feed powder collector
14, exhaust gas drainage tube 15 is equipped with heating zone 8, reaction zone 10, cooling zone 12, coal dust charging in insulating cover 7 successively from top to bottom
Valve 1, Iron Ore Powder inlet valve 2 are connected to mineral material powder stirrer 3, and mineral material powder stirrer 3 connects with 8 top feed mouth of heating zone
Logical, gas inlet valve 4, air inlet valve 5 be connected tos with mixing blower 6, at the top of 6 air outlet of mixing blower and heating zone 8 into
Gas port is connected to, and spiral heating panel 9 is equipped in heating zone 8；Spiral staggered floor panel 11 is equipped in reaction zone 10；It is set in cooling zone 12
There is spiral cooling surface plate 13；The spiral staggered floor panel 11 is connected with spiral heating panel 9, spiral cooling surface plate 13 respectively, position
Mineral feed powder collector 14 is installed in bottom in insulating cover 7, weak magnetic separator is communicated to outside mineral feed powder collector 14；It protects
In warm outer cover 7 gas inlet valve 4 is communicated to outside bottom exhaust gas drainage tube 15.
The spiral heating panel 9 of heating zone 8 includes spiral panel, and several groups are inlayed in the spiral panel and are distributed in M shapes
High temperature resistance silk, the high temperature resistance silk external power supply and temperature controller.
The spiral staggered floor panel 11 of reaction zone 10 is assembled by 300~900 staggered floors by spiral panel, is formed with 10~15cm and falls
Several tomographies of difference.
The spiral cooling surface plate 13 of cooling zone 12 includes spiral panel, and several groups are inlayed in the spiral panel in M shapes point
The heat dissipation pipe of cloth, heat dissipation pipe's water inlet are communicated to high-pressure hydraulic pump 19 by cooling zone water inlet pipe 17, and high-pressure hydraulic pump 19 is intake
Mouth connection radiator 18,18 water inlet of radiator pass through cooling zone outlet pipe 16 and connect logical heat dissipation pipe's water outlet, formed and be closed
Circulating cooling system.
Coal dust inlet valve 1, Iron Ore Powder inlet valve 2 connect controller by electronic sensor.
Gas inlet valve 4, air inlet valve 5 connect controller by electronic sensor.
Several dithers are installed at spiral heating panel 9, spiral staggered floor panel 11,13 back side of spiral cooling surface plate,
Quantity is according to actual use situation setting.
Feature：
1, air is both gaseous carrier, and the O in air is reaction raw materials again.Air and waste gas is mixed by mixing blower 6
Heating zone 8 is sent into pressurization afterwards, is realized the reverse helical flow of mixed gas, is made its direction of motion one with composite ore material
It causes.Iron ore (powder) completes gas phase -- after solid phase reaction, because O elements are rare in mixed gas or do not have, makes to have gone back
Former Fe3O4Back reaction will not occur for iron ore (powder), i.e., oxidation generates Fe again2O3。
2, coal is both heating material and reactant.Composite ore material containing coal dust, Iron Ore Powder is launched into heating zone 8
Spiral panel 9 on heat.C releases heat after being burnt by heating, heat is mixed the Iron Ore Powder in mineral material and absorbs, temperature
It is climbed to 570 DEG C or more.Simultaneously C combined with the O in mixed gas generation CO gases, CO gases further with Iron Ore Powder
In Fe2O3Reaction, generates Fe3O4。
3, external heat (electric physical heating) is combined with self heated (C chemical reaction releases heat), makes full use of the energy.Iron
It is devoted on 8 spiral heating panel 9 of heating zone after miberal powder and coal dust mixing, is gradually heated during moving down,
When coal dust is heated to 300 DEG C or more, the C in coal dust is ignited, and the heat that C burnings release is mixed the iron ore in mineral material
Powder absorbs, and making Iron Ore Powder, temperature rapid increase to Fe2O3570 DEG C or more needed for reduction reaction.
4, spiral heating panel 9, spiral staggered floor panel 11, spiral cooling surface plate 13 are the helicoid in insulating cover 7
Plate is divided into three areas：
(1) heating zone 8：High temperature resistance silk is embedded in M shape point several groups inside spiral panel, external power supply and temperature control
Instrument makes the mixed material for entering heating zone and gas gradually be heated during being moved down on spiral panel, until by point
Heat is born after combustion self, energy is provided for chemical reaction.
(2) reaction zone 10：Spiral panel is pressed into 30 °~90 ° staggered floor assembly, is formed with the several disconnected of 10~15cm drops
Layer makes high temperature Iron Ore Powder falling onto next helical layer panel in waterfall type from the spiral panel of upper layer, in drop event
Fully in mixed gas O, H gas and CO gases contact, make the Fe of high temperature Iron Ore Powder2O3Or FeCO3With in mixed gas
O, H and CO generates chemical reaction, quickly generates Fe within (10-20 seconds)3O4And H2O。
(3) cooling zone 12：In spiral panel several groups water pipe, external high-pressure hydraulic pump 19 and radiator are inlaid into M shapes
18, make flow high-speed circulating and carry out heat exchange with the external world, to keep the high-temperature material for just having reacted completion on spiral panel rapid
Cooling, back reaction (oxidation reaction) would not occur for (570 DEG C or less) after making it below reaction temperature, reach consolidation roasting magnetization
Effect.
5, gas-solid body separation utilizes.Mineral feed powder collector 14 and exhaust gas drainage tube 15 are loaded onto in device bottom, is made instead
The material that should be crossed, which is transported on weak magnetic separator, carries out magnetic separation.The exhaust gas reacted through 15 part of exhaust gas drainage tube flow back into
Air valve, with C, H, O and CO content in mixed gas compounding.Most exhaust gas drains into miberal powder dryer, to make full use of remaining
Heat.
The present invention can be real with the place (150 ㎡ or so) of seldom investment (within 1,000,000 yuan of a set of equipment), very little
Now it is previously required to huge investment (a set of 3,000,000 yuan of rotary kiln or more, a set of 50,000,000 yuan of floated Flash Smelting Furnace or more) and very big
Place (rotary kiln takes up an area 1000 ㎡ or more, floated Flash Smelting Furnace takes up an area 600 ㎡ or more) the iron ore roasting magnetic that could solve
Change problem.
Due to being integrated with advanced electronic induction, control system, gas, coal, iron ore that participation is reacted is made all to be able to essence
It really launches, reduces the discharge of pollutant.
Due to being to generate heat self using the movement of gravity nature and composite ore material of mineral material, greatly reduce
Energy consumption：60% or more energy consumption is reduced than traditional rotary kiln, 30% or more energy consumption is reduced than floated Flash Smelting Furnace.
It is achieved that conversion of the nonmagnetic iron ore to the iron ore that is magnetic with less investment and energy consumption, keeps China a large amount of
Refractory iron ore (such as bloodstone, limonite, siderite) become good choosing easily choosing, China's iron ore money can be greatly improved
The utilization ratio in source has strategic economic value meaning.
The present invention passes through to by coal, iron ore fine grinding material, mixing blower 6 and gas inlet valve 4, air inlet valve 5
One systems such as cooperation carries out reverse air inlet, the spiral cloth heating of iron ore (powder), waterfall type gas-solid precursor reactant, anaerobic are quickly cooled down
Row technical matters realizes that nonmagnetic iron ore (bloodstone, limonite, siderite etc.) is rapidly converted into the iron ore that is magnetic, from
And the concentrate grade (65% or more) and the rate of recovery (90% or more) of iron ore are increased substantially, substantially increase iron ore resource
Utilization rate.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of iron ore roasting Magnitizing method, it is characterised in that：Non-magnetic iron ore, coal are dry grinded respectively to 160 in advance
~200 mesh, according to the iron ore chemical reaction amount and specific heat capacity of measured in advance, by parameters adjusting control coal dust and Iron Ore Powder into
Doses forms mixed mineral feed powder after uniformly mixing and mixing；Mixed mineral feed powder is launched the spiral heating panel to heating zone (8)
(9) it is heated on, coal dust releases H in heated journey2O、O2、H2Equal gases are added in mixed gas；When coal dust is heated
When to 300 DEG C or more, coal dust is ignited, and the O in the C and mixed gas in coal dust generates oxidation reaction, generates CO, CO2Gas,
The heat that C burnings simultaneously release is mixed the Iron Ore Powder in mineral material and absorbs, and the temperature of Iron Ore Powder is made to quickly rise to 570 DEG C
More than；High temperature mixed mineral feed powder continues the spiral staggered floor panel (11) that reaction zone (10) is moved downwardly into along spiral panel
On, it is shaken loose by the free falling of waterfall type several times, makes the Fe in Iron Ore Powder2O3It is fully connect with H, O and CO in mixed gas
It touches, reduction reaction occurs, generate Fe3O4And H2O；The mixed mineral feed powder continuation that reduction reaction is completed is downward along spiral panel
It is manoeuvred into the spiral cooling surface plate (13) of cooling zone (12), Iron Ore Powder temperature is made to rapidly drop to 570 DEG C hereinafter, iron ore
Fe in powder3O4It is completely fixed after being cooled down and back reaction does not occur；Mixed mineral feed powder is defeated after mineral feed powder collector (14) collection
It is sent on weak magnetic separator and carries out magnetic separation.It is synchronous carry out be by adjust gas inlet valve (4) and air inlet valve (5) control into
Tolerance pressurizes after mixing blower (6) mixing and enters heating zone (8), along the downward reverse flow of heating coil panel, flowing
It is heated during dynamic；Oxidation reaction first occurs for the C in O and composite ore material in mixed gas, generates and contains CO and CO2Mixing
Gas, and continue to flow down to reaction zone (10) along spiral panel, with the Fe in mixed mineral feed powder2O3Reduction reaction occurs,
Generate Fe3O4And H2O.Mixed gas becomes exhaust gas after completing reaction, enters exhaust gas drainage tube after cooling zone (12) cool down
(15), air entrance end is flowed back into be used again.
2. a kind of iron ore roasting magnetizing equipment, which is characterized in that mainly by feed system, gas handling system, discharging system and
Insulating cover (7) and circulating cooling system composition, wherein feed system include coal dust inlet valve (1), Iron Ore Powder inlet valve (2),
Mineral material powder stirrer (3), gas handling system include gas inlet valve (4), air inlet valve (5), mixing blower (6), outer row
System includes mineral feed powder collector (14), exhaust gas drainage tube (15), and heating zone is equipped with successively from top to bottom in insulating cover (7)
(8), reaction zone (10), cooling zone (12), coal dust inlet valve (1), Iron Ore Powder inlet valve (2) and mineral material powder stirrer (3) connect
Logical, mineral material powder stirrer (3) be connected to heating zone (8) top feed mouth, gas inlet valve (4), air inlet valve (5) and is mixed
Enraged wind turbine (6) connection, mixing blower (6) air outlet are connected to air inlet at the top of heating zone (8), are equipped in heating zone (8)
Spiral heating panel (9)；Spiral staggered floor panel (11) is equipped in reaction zone (10)；Spiral cooling surface plate is equipped in cooling zone (12)
(13)；The spiral staggered floor panel (11) is connected with spiral heating panel (9), spiral cooling surface plate (13) respectively, is located at heat preservation
Outer cover (7) interior bottom is equipped with mineral feed powder collector (14), and weak magnetic separator is communicated to outside mineral feed powder collector (14)；It protects
It is communicated to gas inlet valve (4) outside the warm interior bottom exhaust gas drainage tube (15) of outer cover (7).
3. a kind of iron ore roasting magnetizing equipment according to claim 2, it is characterised in that：The spiral of heating zone (8) adds
Hot panel (9) includes spiral panel, and the high temperature resistance silk that several groups are in the distribution of M shapes, the temperature resistance are inlayed in the spiral panel
Silk external power supply and temperature controller.
4. a kind of iron ore roasting magnetizing equipment according to claim 2, it is characterised in that：The spiral of reaction zone (10) is wrong
Deck panels (11) are assembled by 300~900 staggered floors by spiral panel, are formed with several tomographies of 10~15cm drops.
5. a kind of iron ore roasting magnetizing equipment according to claim 2, it is characterised in that：The spiral of cooling zone (12) is cold
But panel (13) includes spiral panel, and the heat dissipation pipe that several groups are in the distribution of M shapes is inlayed in the spiral panel, heat dissipation pipe's
Water inlet is communicated to high-pressure hydraulic pump (19) by cooling zone water inlet pipe (17), and high-pressure hydraulic pump (19) water inlet is communicated to radiator
(18), radiator (18) water inlet is connect by cooling zone outlet pipe (16) with heat dissipation pipe, forms closed circulation cooling system.
6. a kind of iron ore roasting magnetizing equipment according to claim 2, it is characterised in that：Coal dust inlet valve (1), iron ore
Powder inlet valve (2) connects controller by electronic sensor.
7. a kind of iron ore roasting magnetizing equipment according to claim 2, it is characterised in that：Gas inlet valve (4), air
Intake valve (5) connects controller by electronic sensor.
8. a kind of iron ore roasting magnetizing equipment according to any one of claim 2~7, it is characterised in that：Spiral adds
Several dithers are installed at hot panel (9), spiral staggered floor panel (11), spiral cooling surface plate (13) back side.
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| CN201810425187.8A CN108330273A (en) | 2018-05-07 | 2018-05-07 | A kind of iron ore roasting Magnitizing method and equipment |
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| CN201810425187.8A CN108330273A (en) | 2018-05-07 | 2018-05-07 | A kind of iron ore roasting Magnitizing method and equipment |
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Cited By (2)
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| CN109192487A (en) * | 2018-08-29 | 2019-01-11 | 江苏健睡宝健康科技有限公司 | A kind of manufacturing method of high-strength magnetic magnetic stripe |
| CN114151725A (en) * | 2021-11-22 | 2022-03-08 | 苏州赛智达智能科技有限公司 | High security of modularization controller for hydrogen bottle |
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