CN207973788U - A kind of coal base fluidization reduction roasting system - Google Patents
A kind of coal base fluidization reduction roasting system Download PDFInfo
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Abstract
A kind of coal base fluidization reduction roasting system, including coal-fired vaporization unit, miberal powder preheating unit, roasting unit, UTILIZATION OF VESIDUAL HEAT IN unit and dust removing units, coal-fired vaporization unit includes coal combustion gasifying furnace and cyclone dust collectors, roasting unit includes roaster, solid-gas separator and reduction reactor, UTILIZATION OF VESIDUAL HEAT IN unit includes heat exchanger, the high-temperature flue gas that coal-fired vaporization unit generates is not required to cooling and is divided into two-way, it is connected all the way with the air inlet of roaster, another way after cyclone dust collectors purification, pressurization with the air inlet of reduction reactor by being connected；The feed inlet of roasting unit is connected with miberal powder preheating unit discharge port, and the discharge port of roasting unit is connected with the feed inlet of UTILIZATION OF VESIDUAL HEAT IN unit, and the exhaust outlet of miberal powder preheating unit is connected to the air inlet of dust removing units.The utility model has many advantages, such as high efficiency, high production capacity, low energy consumption, low cost, is applicable in that region is wide, good product quality.
Description
Technical field
The utility model is related to a kind of ore roasting system and its process method for roasting, specially a kind of coal base fluidization is also
Former roasting system.
Background technology
China's iron ore deposit finds out resource reserve up to 850.8 hundred million tons compared with horn of plenty, by the end of the year 2015, but majority is
" poor ", " thin ", " miscellaneous " mine, inferior quality；Wherein siderite, limonite, oolitic hematite, Hematite and its altogether（Companion）
Raw type Refractory iron ore resource reserve is up to tons up to a million, and currently used physical upgrading technology cannot make full use of such
Ore, though through repeatedly strong（It is weak）Magnetic, flotation, iron concentrate grade and the rate of recovery are still difficult to improve, and current such ore removes a small number of mines
Area is produced outside, and majority does not develop and utilize.Many experiments room is tested and industrial practice proves, magnetizing roast is processing
The most effectual way of Refractory iron ore resource.
The magnetizing roast method of iron ore is mainly the following at this stage：Shaft roasting, rotary kiln baking, fluosolids roasting
And microwave calcining.Shaft roasting is used to handle the lump ore of 15~75mm, and since raw material granularity is thick, roasting time is longer, and only fits
For lump ore, its large-scale promotion application is constrained.Rotary kiln baking is used to handle the ore of 0~25mm, though feed preparation unit size than
Shaft furnace is small, but roasting time requires 60 ~ 90min, while the presence of fine fraction fine ore causes rotary kiln baking to be easy ring formation, roasting
It is larger that process manipulates difficulty.For handling 1mm fine ores below, the heat transfer between the method for roasting gas-particle two-phase passes shower roasting
Matter speed ratio rotary kiln is 3000 ~ 4000 times big, when can quickly complete the magnetic conversion of iron mineral, but roast the reduction reaction of material
Between only tens of seconds, to make reduction reaction fully carry out, reduction temperature generally needs 600 DEG C or more, especially for oolitic hematite
The ore of type structure densification, recovery time show slightly insufficient.Microwave calcining is for handling 0~3mm ores, the method for roasting energy consumption
Low, production environment cleaning, but because of the problems such as secondary energy sources, device need to be used to be difficult to enlargement, fail at present this in iron ore
It is used in the production that yield is big, added value is low.
CN201510647362, CN200610032484 and CN200720064996, which are proposed, to be done heat source using coal and goes back
The fluidized reduction method of roasting of originality medium, this kind of magnetizing roast method calcination process can be completed within tens of seconds, but
Reduction reaction time adjustable extent is small, and for the ore of compact structure, there may be restore insufficient defect；CN
102127635 A are disclosed dry grind together with a kind of coal and vulcanization gold mine after in the side that outer circulating fluid bed reactor internal oxidition roasts
Method, this method, which mixes coal with raw material, is sent into roaster, and coal combustion is only to provide oxidizing roasting required temperature, and uses anti-
Answer device can not by coal ash, material that oxidation reaction is completed, the feed separation for not completing oxidation reaction come, cause in reactor
The circulating load of material is larger, and since the reaction time is difficult to accurately control, and may go out to vulcanize peroxidating or oxygen debtization of gold mine
Phenomenon, while also reducing useful element content in roasted ore；CN 103031432 A, CN201510139825 and
CN201010621731 proposes the fluidization oxidation that heat source and reductant are done using coal gas（Reduction）Method of roasting, but this
Class method of roasting is only applicable to the area of coal gas or natural gas, and requires height to the clean-up performance of coal gas, greatly limits
Its application region.
By technological progress develop it is a kind of be more energy-saving and environmentally friendly, ore more adaptable, dressing product better quality
Fluosolids roasting device and method utilizes the limited iron ore deposit in China, especially Efficient Development to utilize above-mentioned to a greater extent
Though complicated difficult is selected and can be utilized but product quality and the lower iron ore deposit of utilization rate, to improve the self-produced iron ore deposit in China
Occupation rate of market, be always those skilled in the art pursue target.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of the prior art and provide a kind of coal base fluidized reduction
Roasting system, it has many advantages, such as high efficiency, high production capacity, low energy consumption, low cost, is applicable in that region is wide, good product quality.
In order to solve the above technical problems, the utility model proposes technical solution be：A kind of coal base fluidization reduction roasting
System, including coal-fired vaporization unit, miberal powder preheating unit, roasting unit, UTILIZATION OF VESIDUAL HEAT IN unit and dust removing units, the coal-burning steam
It includes coal combustion gasifying furnace and cyclone dust collectors to change unit, and the roasting unit includes roaster, solid-gas separator and reduction reaction
Device, the UTILIZATION OF VESIDUAL HEAT IN unit includes heat exchanger, and the high-temperature flue gas that the fire coal vaporization unit generates is not required to cooling and is divided into two-way,
It is connected all the way with the air inlet of roaster, another way passes through the air inlet with reduction reactor after cyclone dust collectors purification, pressurization
It is connected；The feed inlet of the roasting unit is connected with miberal powder preheating unit discharge port, the discharge port and waste heat of the roasting unit
It is connected using the feed inlet of unit, the exhaust outlet of the miberal powder preheating unit is connected to the air inlet of dust removing units.
As a further improvement of the above technical scheme：The miberal powder preheating unit includes 2~3 grades of cyclone preheaters, on
One cyclonic preheater C1Air inlet and next stage cyclone preheater C2Exhaust outlet by riser be connected, cyclone preheater
It is the preheating for carrying out miberal powder using roaster tail gas, takes full advantage of roaster tail gas waste heat, generally 2 grades of preheating also can root
Preheating series is recycled according to needing to adjust, it is ensured that the delivery temperature of miberal powder preheating unit is at 300 DEG C or less.
Further, the discharge port of the roaster is connected with the feed inlet of solid-gas separator, the solid-gas separator
Discharge port is connected to the feed inlet of reduction reactor, this device configuration roaster need to only complete the effect of combustion heating without
There is provided reducing atmosphere, it can be ensured that without pernicious gases such as remaining CO, NO in outer last person's gas after miberal powder preheating；Reduction reactor is only
It need to complete reduction reaction and not have to provide heat source, and the reduction reaction time can rationally be controlled by adjusting reducing gas flow,
Ensure the independence of roaster and reduction reactor operation.
Further, 3-6 layers of heat-exchanging component are equipped in the heat exchanger, heat-exchanging component arranged in dislocation described in multilayer is changed
Hot device is vertical structure, and roasted ore flows automatically downwards by gravity, and there are larger spaces on heat exchanger top, using gravity in the sky
Between to reduction reactor flow into material detach；The top thermovent of heat exchanger is connected to roaster, the remnants after reaction
Reducibility gas enters burning in roaster, and the waste heat of roasted ore has rationally been recycled while making full use of fuel.
Further, the heat-exchanging component is heat exchanger plates or heat exchanger tube, and the heat transferring medium in heat-exchanging component is air or water,
When heat transferring medium is water, one end of heat-exchanging component is connected to external high-level water storage slot, the other end and external UTILIZATION OF VESIDUAL HEAT IN system
System is connected；When the heat exchange medium is air, one end of heat-exchanging component is connected with air compressor, the other end and external waste heat profit
It is connected with system.
The application method of above-mentioned coal base fluidization reduction roasting system includes the following steps：
1）Raw material is broken：Ore and fire coal are crushed respectively, ensure that the granularity of ore accounts for 30% less than 0.075mm
~80%, fire coal is crushed to granularity and is not more than 15mm；
2）Fire coal vaporization：Broken fire coal is added in coal combustion gasifying furnace, while the fluid bed into coal combustion gasifying furnace
It is passed through suitable water, generates the high-temperature flue gas with reproducibility；
3）Suspension preheating：It is fed in miberal powder preheating unit by bucket elevator and air valve after broken ore metering
Carry out classification preheating so that for miberal powder temperature rise to 250 DEG C~550 DEG C, the flue gas after preheating is cooled to 300 DEG C or less after preheating
It is discharged after being purified by dust removing units；
4）Fluidize state reduction：Miberal powder after preheating, which enters in roaster, first to be roasted, and it is anti-then to enter back into reduction
It answers in device, step 2）In obtained high-temperature flue gas be divided into two-way, enter burning in roaster all the way, heat provided for roasting system
Source；Another way is passed through after dedusting, pressurization to restoring miberal powder in reduction reactor；
5）UTILIZATION OF VESIDUAL HEAT IN：Fluidized reduction product enters in heat exchanger, and heat transferring medium is not contacted with roasted ore, it is ensured that also
Original product is not flowed out by carrying out heat exchange with heat transferring medium after so that reaction product is cooled to 80 DEG C~200 DEG C by secondary oxidation
UTILIZATION OF VESIDUAL HEAT IN unit realizes the waste heat recovery of reaction product.
Further, the step 2）The calorific value of middle broken coal is 14000~27000kJ/kg, in the high-temperature flue gas of generation
CO and H2Total concentration 10%~40%, high-temperature flue gas are used without the cooling two parts that are directly divided into, and a part enters roaster internal combustion
It burns, heat source is provided for the preheating and roasting of raw material；Another part enters reduction reactor after dedusting, pressurization, is restored for raw material
Reductant is provided.
Further, the step 3）In dust removing units include high-temperature blower, bag filter and air-introduced machine, high warm air
Machine is placed at the outlet side of miberal powder preheating unit, and high-temperature blower carries out exhausting to miberal powder preheating unit, roaster, makes the roasting be
System is run under negative pressure, and the pressure of control roaster lower part is -2000Pa~-100Pa, it is ensured that production environment cleans.
Further, the step 4）Material and flue gas are in the fluidized state that spurts, calcination temperature 500 in middle roaster
DEG C~1200 DEG C.
Further, the step 4）Miberal powder carries out reduction reaction under fluidized state in middle reduction reactor, reduction
Property gas be fluidizing agent, dosage is 1.2~2.0 times of theoretical reduction dosage, reduction reaction temperature 400 DEG C~1100
DEG C, 0.5~30min of reduction reaction time.
Compared with prior art, the utility model has the advantage of：
1, the utility model uses common coal-fired while providing heat source and reductant for roasting system, advantageously reduces
Energy consumption and cost are roasted, has widened the applicable region of technology significantly；
2, the high-temperature flue gas that the coal combustion gasifying furnace of the utility model generates, which is not required to cool down, is directly divided into two-way, enters roasting all the way
Burning in stove is burnt, and roaster need to only complete the effect of combustion heating without providing reducing atmosphere, it can be ensured that after miberal powder preheating
Outer last person's gas in without pernicious gases such as remaining CO, NO；Enter in reduction reaction furnace after another way purification pressurization, is carried for system
For reducing medium, it is ensured that the independence of roaster and reduction reactor operation；Can accurately be adjusted according to the difference of ore properties into
Enter the flue gas flow and ingredient of roaster and reduction reaction furnace, rationally adjusts the reduction roasting time；
3, the roasting system of the utility model arranged in dislocation in heat exchanger has Multi-layer exchanging heat component, can make full use of ore
Residual heat resources after roasting are conducive to further decrease process costs；
4, the utility model is suitable for various Refractory iron ore stones（Such as bloodstone, limonite, siderite, roe shape are red
Iron ore and its mineral intergrowth etc.）Magnetizing roast, by the Fe of weak magnetic in ore2O3、FeCO3It is fully converted into ferromagnetic Fe3O4；
5, the technical solution of the utility model has high efficiency, high production capacity（Unit volume production capacity is big）, low cost, applicability
Extensively, the advantages that good product quality, the deep development of China's refractory iron ore resource from now on is utilized and is of great significance.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Marginal data：
1, coal-fired vaporization unit；11, coal combustion gasifying furnace；12, cyclone dust collectors；2, miberal powder preheating unit；21, whirlwind preheats
Device；211, upper level cyclone preheater C1；212, next stage cyclone preheater C2；3, roasting unit；31, roaster；32, solid and gas
Separator；33, reduction reactor；4, UTILIZATION OF VESIDUAL HEAT IN unit；41, heat exchanger；5, dust removing units；51, high-temperature blower；52, cloth bag
Deduster；53, air-introduced machine；6, bucket elevator；7, air valve；8, star feeder；9, gas compressor.
Specific implementation mode
For the ease of understanding the utility model, below in conjunction with Figure of description and preferred embodiment to the utility model
Work more comprehensively, meticulously describes, but the scope of protection of the utility model is not limited to embodiment in detail below.
As shown in Figure 1, a kind of coal base fluidization reduction roasting system, including coal-fired vaporization unit 1, miberal powder preheating unit 2,
Roasting unit 3, UTILIZATION OF VESIDUAL HEAT IN unit 4 and dust removing units 5, coal-fired vaporization unit 1 include coal combustion gasifying furnace 11 and cyclone dust collectors
12, roasting unit 3 includes roaster 31, solid-gas separator 32 and reduction reactor 33, and UTILIZATION OF VESIDUAL HEAT IN unit 4 includes heat exchanger
41, the high-temperature flue gas that coal-fired vaporization unit 1 generates is not required to cooling and is divided into two-way, is connected all the way with the air inlet of roaster 31, separately
A-road-through crosses the purification of cyclone dust collectors 12, gas compressor 9 is connected after pressurizeing with the air inlet of reduction reactor 33；Roasting unit
3 feed inlet is connected with 2 discharge port of miberal powder preheating unit, the discharge port of roasting unit 3 and the feed inlet phase of UTILIZATION OF VESIDUAL HEAT IN unit 4
Even, the exhaust outlet of miberal powder preheating unit 2 is connected to the air inlet of dust removing units 5.
In the present embodiment, miberal powder preheating unit 2 includes two stage cyclone preheater 21, upper level cyclone preheater C1211
Air inlet and next stage cyclone preheater C2212 exhaust outlet is connected by riser.
Upper level cyclone preheater C1211 blast pipes are connected to next stage cyclone preheater C by riser2212 outlet air
Mouthful, the feed opening of bucket elevator 6 passes through pipeline and upper level cyclone preheater C1211 blast pipe is connected, upper level whirlwind
Preheater C1The discharge port of 211 bottoms by after pipeline and air valve 7 with next stage cyclone preheater C2212 blast pipe is connected,
Upper level cyclone preheater C1The air inlet that 211 exhaust outlet passes through high-temperature blower 51 and pipeline and dust removing units bag filter 52
Mouth connection, the exhaust outlet of bag filter 52 are connected to by pipeline with the air inlet of air-introduced machine 53, and the exhaust outlet of air-introduced machine 53 is logical
Piping is connected with external chimney.
In the present embodiment, the feed inlet of roaster 31 passes through pipeline and next stage cyclone preheater C2212 discharge port phase
Even, the discharge port of roaster 31 is connected with the feed inlet of solid-gas separator 32, and the exhaust outlet of solid-gas separator 32 passes through riser
With next stage cyclone preheater C2212 blast pipe is connected, the charging of the discharge port and reduction reactor 33 of solid-gas separator 32
Mouth connection.
In the present embodiment, five layers of heat-exchanging component, Multi-layer exchanging heat component arranged in dislocation, heat exchanger 41 are equipped in heat exchanger 41
For vertical structure；The top thermovent of heat exchanger 41 is connected to roaster 31, and the discharge gate of heat exchanger 41 passes through pipeline and star
The feed inlet of batcher 8 is connected, and is convenient for the discharge of roasted ore.
In the present embodiment, heat-exchanging component is heat exchanger plates or heat exchanger tube, and the heat transferring medium in heat-exchanging component is water, heat-exchanging component
One end be connected to external high-level water storage slot, the other end is connected with the afterheat utilizing system of outside.
The application method of above-mentioned coal base fluidization reduction roasting system includes the following steps：
1）Raw material is broken：Ore and fire coal are crushed respectively, ensure that the granularity of ore accounts for 30% less than 0.075mm
~80%, fire coal is crushed to granularity and is not more than 15mm, is separately stored in after broken in miberal powder raw material cabin and coal-fired raw material cabin；
2）Fire coal vaporization：Broken fire coal is added in coal combustion gasifying furnace 11, while the stream into coal combustion gasifying furnace 11
Change bed and be passed through suitable water, generates the high-temperature flue gas with reproducibility；
3）Suspension preheating：After miberal powder metering in raw material cabin upper level whirlwind is fed after bucket elevator 6 and air valve 7
Preheater C1It is preheated in 211 so that temperature of charge enters next stage cyclone preheater C after rising to 250 DEG C ~ 300 DEG C2212
It is further preheated, exhaust temperature drops to 230 DEG C or so rear entrance dust removing units 5；Through upper level cyclone preheater
C1Miberal powder after 211 preheatings is again introduced into next stage cyclone preheater C2212 carry out heat exchange with the exhaust gas that roaster 31 is discharged,
So that miberal powder temperature rise enters to after 500 DEG C ~ 550 DEG C in roaster 31, from next stage cyclone preheater C2212 exhaust outlets are arranged
The exhaust gas temperature gone out enters upper level cyclone preheater C after being down to 400 DEG C ~ 450 DEG C1211 carry out heat exchange with miberal powder；
4）Fluidize state reduction：Miberal powder after preheating is entered in roaster 31 and is first roasted, and then enters back into reduction
In reactor 33, step 2）In obtained high-temperature flue gas be divided into two-way, enter burning in roaster 31 all the way, carried for roasting system
Supplying heat source；Another way is passed through to reduction reactor 33 is interior after dedusting, pressurization and restores miberal powder；
5）UTILIZATION OF VESIDUAL HEAT IN：Fluidized reduction product enters 41 top of heat exchanger, anti-to restoring in the space using gravity
The material that device 33 flows into is answered to carry out gas solid separation；Flue gas after separation enters burning in roaster 31, is provided for roasting system
Heat source；The material UTILIZATION OF VESIDUAL HEAT IN area that solid roasting product enters 41 lower part of heat exchanger under the effect of gravity carries out returning for waste heat
It receives；The dislocation of material UTILIZATION OF VESIDUAL HEAT IN area is disposed with plate heat-exchanging component, and water is passed through in heat-exchanging component as heat transferring medium, high-temperature material
By carrying out heat exchange with heat transferring medium, reaction unit is sent out after so that reaction product is cooled to 150 DEG C, completes fluidized reduction roasting
Burning processing.
In the present embodiment, step 2）The calorific value of middle broken coal is 14000~27000kJ/kg, CO in the high-temperature flue gas of generation
And H2Total concentration 10%~40%, high-temperature flue gas are directly divided into two-way by autocontrol valve without cooling, accurately control two-way
The flow of flue gas so that the exhaust gas volumn burnt in into roaster 31 accounts for the 70% ~ 80% of amount of flue gas emission, leads to after dedusting, pressurization
Enter to the tolerance in reduction reactor 33 to account for the 20% ~ 30% of amount of flue gas emission；The flue gas that coal gas generates in roaster 31 after burning
Temperature is 700 DEG C ~ 750 DEG C, the miberal powder temperature rise after roasting is to flowing into after 550 DEG C ~ 600 DEG C in reduction reactor 33 further
Reduction reaction occurs.
In the present embodiment, step 3）Middle dust removing units 5 include high-temperature blower 51, bag filter 52 and air-introduced machine 53, height
Warm air machine 51 is placed at the outlet side of miberal powder preheating unit 2, and high-temperature blower 51 carries out miberal powder preheating unit 2, roaster 31
Exhausting makes roasting system run under negative pressure, and the pressure of 31 lower part of control roaster is -2000Pa~-100Pa.
In the present embodiment, step 4）Material and flue gas are in the fluidized state that spurts, calcination temperature 500 in middle roaster 31
DEG C~1200 DEG C.
In the present embodiment, step 4）Miberal powder carries out reduction reaction under fluidized state in middle reduction reactor 33, reduction
Property gas be fluidizing agent, dosage is 1.2~2.0 times of theoretical reduction dosage, reduction reaction temperature 400 DEG C~1100
DEG C, 0.5~30min of reduction reaction time.
For the Refractory iron ore of raw ore TFe grades 32.54%, at above-mentioned coal base fluidization reduction roasting technique
Reason, magnetic susceptibility >=95% of roasted product, roasted ore not ore grinding by one it is thick two essence three times low intensity magnetic separation can get iron concentrate grade >=
60%, the sorting index of iron recovery >=88%.
Claims (6)
1. a kind of coal base fluidization reduction roasting system, it is characterised in that：Including coal-fired vaporization unit（1）, miberal powder preheating unit
（2）, roasting unit（3）, UTILIZATION OF VESIDUAL HEAT IN unit（4）And dust removing units（5）, the fire coal vaporization unit（1）It is vaporized including fire coal
Stove（11）And cyclone dust collectors（12）, the roasting unit（3）Including roaster（31）, solid-gas separator（32）And reduction reaction
Device（33）, the UTILIZATION OF VESIDUAL HEAT IN unit（4）Including heat exchanger（41）, the fire coal vaporization unit（1）The high-temperature flue gas of generation is not
Need to cool down and be divided into two-way, all the way with roaster（31）Air inlet be connected, another way passes through cyclone dust collectors（12）Purification, pressurization
Afterwards with reduction reactor（33）Air inlet be connected；The roasting unit（3）Feed inlet and miberal powder preheating unit（2）Discharge port
It is connected, the roasting unit（3）Discharge port and UTILIZATION OF VESIDUAL HEAT IN unit（4）Feed inlet be connected, the miberal powder preheating unit（2）
Exhaust outlet and dust removing units（5）Air inlet connection.
2. coal base fluidization reduction roasting system according to claim 1, it is characterised in that：The miberal powder preheating unit
（2）Including 2 ~ 3 grades of cyclone preheaters（21）, upper level cyclone preheater C1（211）Air inlet and next stage cyclone preheater C2
（212）Exhaust outlet by riser be connected.
3. coal base fluidization reduction roasting system according to claim 1, it is characterised in that：The roaster（31）Go out
Material mouth and solid-gas separator（32）Feed inlet be connected, the solid-gas separator（32）Discharge port and reduction reactor（33）'s
Feed inlet is connected to.
4. coal base fluidization reduction roasting system according to any one of claim 1-3, it is characterised in that：The heat exchange
Device（41）Inside it is equipped with 3-6 layers of heat-exchanging component, heat-exchanging component arranged in dislocation described in multilayer, heat exchanger（41）For vertical structure；It changes
Hot device（41）Top thermovent and roaster（31）Connection.
5. coal base fluidization reduction roasting system according to claim 4, it is characterised in that：The heat-exchanging component is heat exchange
Plate or heat exchanger tube, the heat transferring medium in heat-exchanging component is air or water, when heat transferring medium is water, one end of heat-exchanging component with it is outer
Portion's high-level water storage slot connection, the other end are connected with external afterheat utilizing system；When the heat exchange medium is air, heat-exchanging component
One end is connected with air compressor, and the other end is connected with external afterheat utilizing system.
6. coal base fluidization reduction roasting system according to any one of claim 1-3, it is characterised in that：The dedusting
Unit includes high-temperature blower, bag filter and air-introduced machine, and high-temperature blower is placed at the outlet side of miberal powder preheating unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820313820.XU CN207973788U (en) | 2018-03-07 | 2018-03-07 | A kind of coal base fluidization reduction roasting system |
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| CN201820313820.XU CN207973788U (en) | 2018-03-07 | 2018-03-07 | A kind of coal base fluidization reduction roasting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108239700A (en) * | 2018-03-07 | 2018-07-03 | 长沙矿冶研究院有限责任公司 | A kind of coal base fluidization reduction roasting system and its method of roasting |
| CN110396594A (en) * | 2019-08-21 | 2019-11-01 | 东北大学 | Strengthen the microwave continuous suspension roasting method that high-phosphor oolitic hematite mentions iron drop phosphorus |
-
2018
- 2018-03-07 CN CN201820313820.XU patent/CN207973788U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108239700A (en) * | 2018-03-07 | 2018-07-03 | 长沙矿冶研究院有限责任公司 | A kind of coal base fluidization reduction roasting system and its method of roasting |
| CN108239700B (en) * | 2018-03-07 | 2023-11-28 | 长沙矿冶研究院有限责任公司 | Coal-based fluidization reduction roasting system and roasting method thereof |
| CN110396594A (en) * | 2019-08-21 | 2019-11-01 | 东北大学 | Strengthen the microwave continuous suspension roasting method that high-phosphor oolitic hematite mentions iron drop phosphorus |
| CN110396594B (en) * | 2019-08-21 | 2021-06-08 | 东北大学 | Microwave continuous suspension roasting method for enhancing iron and phosphorus increase and reduction of high-phosphorus oolitic hematite |
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