CN209178420U - A kind of device of coal-based direct reduction baked for producing reduced iron - Google Patents
A kind of device of coal-based direct reduction baked for producing reduced iron Download PDFInfo
- Publication number
- CN209178420U CN209178420U CN201821560855.XU CN201821560855U CN209178420U CN 209178420 U CN209178420 U CN 209178420U CN 201821560855 U CN201821560855 U CN 201821560855U CN 209178420 U CN209178420 U CN 209178420U
- Authority
- CN
- China
- Prior art keywords
- iron
- separation
- reduction
- coal
- mesh
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 245
- 239000003245 coal Substances 0.000 title claims abstract description 89
- 238000000926 separation method Methods 0.000 claims abstract description 105
- 229910052742 iron Inorganic materials 0.000 claims abstract description 79
- 239000000463 material Substances 0.000 claims abstract description 58
- 238000000227 grinding Methods 0.000 claims abstract description 51
- 238000007885 magnetic separation Methods 0.000 claims abstract description 42
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 27
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 150000002505 iron Chemical class 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005119 centrifugation Methods 0.000 claims description 38
- 238000001354 calcination Methods 0.000 claims description 28
- 125000004122 cyclic group Chemical group 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 18
- 239000003517 fume Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 15
- VQAPWLAUGBBGJI-UHFFFAOYSA-N [B].[Fe].[Rb] Chemical compound [B].[Fe].[Rb] VQAPWLAUGBBGJI-UHFFFAOYSA-N 0.000 claims description 14
- 238000007791 dehumidification Methods 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000005367 electrostatic precipitation Methods 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- ZRFVNNCSPNLIJO-UHFFFAOYSA-N [Fe].[Rb] Chemical compound [Fe].[Rb] ZRFVNNCSPNLIJO-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 238000010304 firing Methods 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 36
- 238000011084 recovery Methods 0.000 abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000012467 final product Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000007789 gas Substances 0.000 description 15
- 238000011161 development Methods 0.000 description 11
- 239000012535 impurity Substances 0.000 description 11
- 230000008901 benefit Effects 0.000 description 10
- 239000002699 waste material Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 230000002829 reductive effect Effects 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000571 coke Substances 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000012216 screening Methods 0.000 description 5
- 238000004939 coking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000007363 ring formation reaction Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012717 electrostatic precipitator Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- ZDVYABSQRRRIOJ-UHFFFAOYSA-N boron;iron Chemical compound [Fe]#B ZDVYABSQRRRIOJ-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000005338 frosted glass Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010094 polymer processing Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a kind of devices of coal-based direct reduction baked for producing reduced iron, are related to chemical metallurgy technical field；System is detached including coal-based direct reduction roasting system, reducing agent magnetic separation separation secondary reduction iron, the selected separation secondary reduction iron series system of a reduced iron system, the selected extraction system of a reduced iron, Raymond mill circular grinding, the multistage selected separation system of secondary reduction iron are separated to roller circular grinding magnetic separation；It is detached by feedstock processing, coal-based direct reduction roasting, magnetic separation separation, the roasting of secondary reduction iron, selected separation, multistage selected isolated final product；The present apparatus is suitble to the relatively large any type iron oxide ore of 48% density of Fe >, and magnetic concentration does not influence the rate of recovery of iron, and it is selected in a reducing material to restore iron material, is not limited by raw material, restores Iron grade Fe > 97%；Sulfur removal effectiveness > 55%, dephosphorization efficiency > 65%.
Description
Technical field
The utility model belongs to chemical metallurgy technical field, in particulars relate to a kind of coal-based direct reduction baked for producing reduction
The device of iron.
Background technique
Since the iron content of reduction iron product is high, the content of copper content, field trash, nitrogen content and other bad metals
It is few, it is the diluent of steel scrap relict element, is the indispensable control relict element of electric furnace smelting high-quality clean steel, high-quality steel
Raw material；It is that the equipments such as casting, ferroalloy, powder metallurgy, equipment manufacture production petroleum, synthesis chemical industry, nuclear facilities are indispensable
Few raw material；It is the best coolant of pneumatic steelmaking, is used for converter producing by cold burden of direct reduced iron, makes operator more
To reach the expection of production low cost, high quality of products the usage amount of converter can be improved, favorably in flexibly adjustment burden structure
In improving converter operating rate and yield, the heat utilization efficiency of converter producing is effectively improved.In recent years since the supply of metallurgical coal is more next
More difficult, the price of metallurgical coal and metallurgical coke is stepped up, the price for the metallurgical coking coal being stepped up and cheap natural gas price
Lattice are compared, and the technology of directly original iron technical substitution blast furnace ironmaking reductive coke is more aobvious urgent also imperative；Global shale gas
Exploration and development, being continuously increased for gas production, the price decline of clean, cheap natural gas are raw for direct reduced iron
The fuel of production has widened great development space.
Direct reduced iron technology is mainly kiln process both at home and abroad at present, due to rotary kiln energy consumption (mark coal) high > 600kg/
T, the control of thermal technology's difficulty, ring formation is serious, production is unstable, and to ingredient requirement harshness --- usual production requirement iron content Fe >
68.5%、SiO2It is highly difficult to meet reduced iron demand by < 3.5%；Most fatal ring formation of rotary kiln is serious, and reducing gas is in upper reduction
Material is small in lower contact surface while reaching the requirement of reducing gas concentration, also to combine peroxide full combustion, thus basic structure is not
At the abundant reduction atmosphere of iron ore and reducing gas, so rotary kiln heating time is long, heating temperature is high, the energy and money are caused
Source waste, thus energy consumption is high, production efficiency is low, has become the restricted link of domestic and international direct reduced iron development, sternly
The development of direct reduced iron is affected again, thus direct reduced iron does not obtain tremendous development in China.
Utility model content
A kind of the utility model overcome the deficiencies in the prior art, it is therefore an objective to side of coal-based direct reduction baked for producing reduced iron
Method and its device.In order to solve the above technical problems, the technology employed by the present utility model is
A kind of device of coal-based direct reduction baked for producing reduced iron, including the roasting of raw material processing system, coal-based direct reduction
Burning system, reducing agent magnetic separation separation secondary reduction iron detach system, separate reduced iron system, one to roller circular grinding magnetic separation
The selected separation secondary reduction iron series system of the selected extraction system of secondary reduced iron, Raymond mill circular grinding, secondary reduction iron multistage are selected
Separation system and dedusting of negative pressure dedusting separation system.
The raw material processing system includes sequentially connected fume afterheat heating and dehumidification device, sieving approach storage device
Lifting device is transmitted with mixing.
The coal-based direct reduction roasting system is coal-based direct reduction calcining kiln.
The described reducing agent magnetic separation separation secondary reduction iron detach system include high intensity magnetic separation device in sequentially connected primary,
Primary thickness separator, the superpower concentration equipment of rubidium iron boron, reducing agent separation bin.
Described includes sequentially connected to roller circular grinding dress to a roller circular grinding magnetic separation reduced iron system of separation
Set, thickness cyclic separation device, in recycle concentration equipment by force, primary reduction ferrikinetics storehouse, once restore lifting device.
Selected extraction system of reduced iron includes that the centrifugation of sequentially connected 160 mesh first detaches device, in the first multistage
Strong selecting device, a reduced iron storage silo and a reduced iron substandard products warehouse.
The selected separation secondary reduction iron series system of the Raymond mill circular grinding includes that sequentially connected 160 mesh second is centrifuged
Detach device, Raymond mill circular grinding device, selected cyclic separation device, in recycle selecting device and secondary reduction iron by force and promoted
Device.
The multistage selected separation system of the secondary reduction iron includes that sequentially connected 300 mesh centrifugation detaches device, second
Strong selecting device, secondary reduction iron product warehouse in multistage.
The coal-based direct reduction calcining kiln is connected by heat source pipeline with the fume afterheat heating and dehumidification device；
The mixing transmission lifting device is connected by the first transmission lifting device with the coal-based direct reduction calcining kiln entrance
It connects；The coal-based direct reduction calcining kiln discharge port passes through high intensity magnetic separation device in the second transmission lifting device and the primary
It is connected；In the primary high intensity magnetic separation device outlet respectively with primary thickness separator and the superpower concentration equipment phase of rubidium iron boron
Connection；The primary thickness separator discharge port detaches device with the centrifugation of 160 mesh second respectively and fills to roller circular grinding
It sets and is connected, the discharge port of the superpower concentration equipment of rubidium iron boron is connected with reducing agent separation bin.
Described is connected to roller circular grinding device discharge port with thickness cyclic separation device；The thickness circulation point
Recycled by force in respectively from device concentration equipment and 160 mesh first centrifugation detach device be connected, it is described in recycle magnetic separation by force
Device discharge port is connected with primary reduction ferrikinetics storehouse；The primary reduction ferrikinetics bin discharge port external and primary reduction are promoted
Device is connected；The primary reduction lifting device is connected with to roller circular grinding device feeding inlet；160 mesh
One centrifugation detaches device discharge port and is connected with selecting device strong in the first multistage；Strong selecting device goes out in first multistage
Mouth is connected with a reduced iron storage silo and a reduced iron substandard products warehouse respectively；160 mesh second centrifugation detaches dress
Discharge port is set to be connected with the Raymond mill circular grinding device；The Raymond mill circular grinding device discharge port with it is selected
Cyclic separation device is connected；The selected cyclic separation device discharge port recycles by force selecting device in and is connected；It is described
In recycle selecting device by force and be connected with secondary reduction iron lifting device；The selected cyclic separation device discharge port with
The centrifugation of 300 mesh detaches that device is connected, the centrifugation of described 300 mesh detaches device discharge port and selecting device phase strong in the second multistage
Connection.
The dedusting of negative pressure dedusting separation system is followed with the selected extraction system of a reduced iron, Raymond mill respectively
Ring grinds selected separation secondary reduction iron series system and is connected with the multistage selected separation system of secondary reduction iron.
Further, dedusting of negative pressure dedusting separation system includes ash disposal dust removal separation apparatus, negative pressure induced wind device and electrostatic
Dust-extraction unit.
Further, 160 mesh first centrifugation detaches device and the centrifugation of 160 mesh second detaches device, utilizes system
Negative pressure detaches the above material of 160 mesh, and dust is extracted away, material needed for centrifugal gravity is isolated.
Further, the coal-based direct reduction calcining kiln include it is snakelike heat upwards naturally channel and it is natural from upper and
Lower roasting reduction channel, it is described snakelike to heat channel upwards naturally roasting reduction channel is separated by from top to bottom naturally with described
Absolutely.
A kind of method of coal-based direct reduction baked for producing reduced iron, comprising the following steps:
A) feedstock processing: iron oxide ore is broken by screening, make its partial size < 4cm, by obtained iron oxide ore and coal
Mud mixing, obtains mixed material, makes mixed material moisture weight percentage < 12%；
B) coal-based direct reduction roasts: the mixed material roast also by coal-based direct reduction calcining kiln
Original, 950-1020 DEG C of the maturing temperature, 900-950 DEG C of reduction temperature, exhaust gas temperature is 160-200 DEG C；
C) circular grinding magnetic separation separates a reduced iron: the roasting material after reduction roasting is successively passed through strong magnetic in primary
Choosing, obtains the first separation of material；
D) first separation of material a selected extraction of reduced iron: is drawn into 160 through thickness cyclic separation device
Mesh centrifugation detaches device, successively detaches device abstraction dust through the centrifugation of 160 mesh, strong selected separation in multistage, obtains 160 purpose of >
Reduced iron material；
E) secondary reduction roasts: a reduced iron material being carried out roasting reduction by coal-based direct reduction calcining kiln and is obtained
Secondary reduction iron material, 950-1020 DEG C of the maturing temperature, 900-950 DEG C of reduction temperature, exhaust gas temperature 160-200
℃；
F) recleaning separates: it is levigate to more than 300 mesh through Raymond mill system by the secondary reduction iron material, then
Device abstraction dust is detached through the centrifugation of 300 mesh, the strong selected high-quality secondary reduction iron for obtaining 300 mesh of > of selecting device in multistage
Finished product.
Preferably, 3 millimeters of the coal slime particle <, sulfur-bearing S < 0.4%.
Preferably, heating and dehumidification is carried out to the mixed material by the waste heat that coal-based direct reduction roasting generates.
Preferably, the roasting material after reduction roasting is successively passed through into high intensity magnetic separation in primary in the step c), obtains
One separation of material；Reducing agent coal is recycled sufficiently through the superpower magnetic separation of rubidium iron boron again, and reducing agent coal is separated.
Compared with prior art the utility model has the following beneficial effects:
1) for feedstock processing: raw material is utilized more than coal-based direct reduction calcining kiln flue gas during being removed moisture
Heat, heating removal iron oxide ore and reducing agent moisture of coal fines reduce smoke heat energy and lose and do not influence calcining kiln reduction, former auxiliary
It after material removes moisture removal, is not only convenient for producing, 15% or so reduction efficiency of calcining kiln also can be improved, provided for coal-based direct reduction
Abundant advantage.
Once restoring iron can be baking mixed with iron ore raw material, reduces unnecessary energy resources waste, improves also
Original roasting efficiency, once restores iron and reducing agent coal recycles and absorbs iron oxide ore moisture and reducing agent moisture of coal fines respectively,
Abundant advantage is created for raw and auxiliary material preparation.
Mix can be baking mixed for various types iron oxide ore in the utility model, does not influence the rate of recovery of iron, secondary
Raw material for reduced iron solves that reduced iron raw material are rare to ask by reduced iron requirement selected extraction in a reduction roasting material
Topic limits the production of reduced iron by raw material and interferes with price, and this method is of less demanding to iron oxide ore, as long as Fe content >
48%, relatively denser good in economic efficiency raw material, this method raw material has sufficient huge raw material market and selection empty
Between.
2) for the technique of coal-based direct reduction roasting: since the coal-based direct reduction calcining kiln is snakelike naturally upward
Heating channel, roasting reduction channel is isolated from top to bottom naturally with described, thus has accomplished heating flue gas and reduction roasting material
Take their own roads, be precisely controlled respectively for coal-based direct reduction roasting reduction temperature, reducing gas concentration, recovery time established it is good
Good basis provides adequately reduction atmosphere for coal-based direct reduction.Coal-based direct reduction roasting described in the utility model
Ignition temperature it is adjustable controllably at 950-1020 DEG C, can accomplish ditty, accurate adjustment, fine tuning by reduction temperature requirement；Reduction temperature essence
It is quasi- easily-controllable in 900-950 DEG C of reduction range；Reducing agent coal and iron oxide ore are mixed well by reduction requirement ratio, that is, can reach roasting
It is easily-controllable to reducing gas concentration requirement letter to burn reduction process；Recovery time is even more that frequency conversion is easily-controllable；Thus this link roasting reduction
Ton 25m3/ tons of mines of mine gas consumption, only the 50% of 50m3/ tons of mines of rotary kiln for directly reducing iron process gas consumption.
Due to 160 DEG C -200 DEG C of the coal-based direct reduction calcining kiln exhaust gas temperature, using fume afterheat to former auxiliary material
Expect heating and dehumidification, reduce smoke evacuation heat-energy losses, reduction roasting is greatly improved compared with 450 DEG C -550 DEG C of rotary kiln exhaust gas temperature
Burn heat utilization rate.Since the coal-based direct reduction calcining kiln heat insulation effect is good, the outer temperature of kiln and is returned close to room temperature
Rotary kiln is compared and considerably reduces unnecessary radiation loss.The snakelike channel of heating upwards naturally of hot fume is utilized to heat, because
Without the flue gas air inducing power consumption of rotary kiln；Roasting is utilized in roasting reduction channel to coal-based direct reduction calcining kiln from top to bottom
Imitation frosted glass gravity is naturally downward, not the rotation output power consumption of rotary kiln, this coal-based direct reduction calcining kiln power consumption pole
It is small.
The more existing domestic and international rotary kiln for directly reducing iron process of this link comprehensive energy consumption is compared to reduction > 60%.
3) reducing agent magnetic separation separation secondary reduction iron is detached: before the non-attrition process of reducing material, due to non-magnetic
Property, weakly magnetic material utilize high intensity magnetic separation in primary and primary thickness separator together with magnetizing reduction materials from bonding
It recycles reducing material sufficiently with secondary reduction iron to separate, the superpower magnetic separation of rubidium iron boron is recycled to divide waste material sufficiently with reducing agent coal
From separating reducing agent coal is also recycling, reduces reducing agent cost.
4) separate a reduced iron to roller circular grinding magnetic separation: after iron ore reduction roasting, reduction irony is firmly most of
Impurity matter is soft, and dust specific gravity is relatively small, when reducing material is levigate to 160 mesh reduction iron granules with most of impurity point
From a, reducing material successively through to roller circular grinding, in recycle magnetic separation by force, thickness cyclic separation device obtains 160 mesh one of >
Secondary reduced iron material, circular grinding magnetic separation good separation energy consumption are extremely low.
5) the selected extraction of a reduced iron solves the in great shortage problem of reduced iron raw material: the reduced iron material warp
Thickness cyclic separation device is drawn into the centrifugation of 160 mesh first and detaches device, then is successively extracted dust, strong selected separation in multistage
A reduced iron is obtained, secondary reduction upgrading is gone；Secondary reduction iron material is selected in a reducing material as required, is not restored
The in great shortage limitation of iron raw material self opens huge reduced iron raw material selection and development space without dry by the market price
It disturbs, it is selected to extract a reduced iron and go secondary abundant reduction upgrading synergy, solve the in great shortage problem of reduced iron raw material.
6) the selected separation secondary reduction iron series system of Raymond mill circular grinding: the secondary reduction iron is separated through primary thickness
Device, which is drawn into the centrifugation of 160 mesh second and detaches device, obtains the above secondary reduction iron material of 160 mesh, more than 160 mesh two
Secondary reduced iron material again successively through Raymond mill circular grinding device, selected cyclic separation device, in recycle selecting device, secondary by force
Lifting device separation is restored, featured cyclic separation device is drawn into the centrifugation of 300 mesh and detaches isolated 300 mesh of device or more two
Secondary reduced iron material；Impurity dust removes in time reduces unnecessary power consumption of polymer processing.
7) the multistage selected separation of secondary reduction iron: by the above secondary reduction iron material of 300 mesh through essence strong in multistage
Screening device obtains high-quality secondary reduction iron after purification；Using the selected separation of circular grinding, separating effect is significant, with other works
Skill is more extremely low than levigate energy consumption, but greatly improves secondary reduction iron quality, thus upgrading synergy.
8) dedusting of negative pressure dedusting separation system: the not only ash disposal dedusting of negative pressure centrifugal gravity separator is also centrifuge separation
System, magnetic separation separation process create negative pressure advantage, and electrostatic precipitation further improves efficiency of dust collection.
Using a process for preparing reduction Iron grade Fe > 97%, P < 0.018%, remove objectionable impurities significant effect, remove
Sulphur efficiency > 55%, dephosphorization efficiency > 65%.
In conclusion this method and device are smelted iron without coke, iron ore is reduced directly under solid conditions, and roasting is using clear
Clean energy gas heating, it is simple and easily-controllable using cheap common coal and fine ore as raw and auxiliary material mixing, and greatly improve
Contact area is restored, process is restored for direct-reduction and has established sufficiently reliable basis, coking and sintering process are saved, with biography
System ironmaking technology is compared, and molten iron cost reduces > 20%, significantly improves the cost-competitive of steel, so this coal base is directly also
Former baked for producing reduction iron process is a kind of high quality and low cost, energy-efficient clean energy-saving selects iron new process, is to blast furnace ironmaking
The subversiveness strategic structural of reductive coke, thus coal-based direct reduction baked for producing reduced iron replaces blast furnace ironmaking reductive coke more
Rationally.
Compared with existing domestic and international rotary kiln technology, the present apparatus have flexibly practical, energy-efficient, process flow it is brief,
Ring formation, iron recovery format high throughput be not big, stable product quality, counter investment it is small it is quick, can develop in production, last shape
At intensive large-scale production, it can be achieved that rolling the advantages that explosive growth develops, thus the roasting life of this coal-based direct reduction
Produce reduction process for making iron, market development has a extensive future, easy to spread, due to other insufficient techniques of comprehensive energy consumption two/
One, Energy Conservation has a high potential, and especially improves steel products structure and energy resource structure, gets rid of coking coal resource to steel production hair
The yoke of exhibition, energy-saving and emission-reduction do more advantage from source.
Therefore, China's mill coal resources advantage abundant is played, using domestic and international iron ore and natural gas resource, develops coal base
It is reduced directly baked for producing reduced iron, substitution blast furnace ironmaking reductive coke not only has very significant social benefit and reality
Economic benefit；And the production of domestic development direct reduced iron is very necessary, and it is China's steel industry sustainable development, realizes circulation
Economy protects the important link of environment, industry scholar and economist's prediction, the Chinese direct reduced iron within a period of time from now on
Production has huge development space and development prospect.
Detailed description of the invention
Fig. 1 is a kind of device connection schematic diagram of coal-based direct reduction baked for producing reduced iron of the utility model.
Specific embodiment
As shown in Figure 1, a kind of device of coal-based direct reduction baked for producing reduced iron, including raw material processing system, coal base
Direct-reduction roasting system, reducing agent magnetic separation separation secondary reduction iron detach system, once go back to roller circular grinding magnetic separation separation
The selected separation secondary reduction iron series system of former iron series system, the selected extraction system of a reduced iron, Raymond mill circular grinding, secondary reduction
The multistage selected separation system of iron and dedusting of negative pressure dedusting separation system.
Raw material processing system includes sequentially connected fume afterheat heating and dehumidification device 101, sieving approach storage device 102
Lifting device 103 is transmitted with mixing.
Coal-based direct reduction roasting system is coal-based direct reduction calcining kiln 201.
Reducing agent magnetic separation separation secondary reduction iron detach system include it is sequentially connected primary in high intensity magnetic separation device 301, just
Grade thickness separator 302, the superpower concentration equipment 303 of rubidium iron boron, reducing agent separation bin 304.
To roller circular grinding magnetic separation separate a reduced iron system include it is sequentially connected to roller circular grinding device 401,
Thickness cyclic separation device 402, in recycle concentration equipment 403 by force, primary reduction ferrikinetics storehouse 404, once restore lifting device
405。
Selected extraction system of reduced iron includes that the sequentially connected centrifugation of 160 mesh first detaches the 501, first multistage of device
In strong 502, reduced iron storage silos 503 of selecting device and a reduced iron substandard products warehouse 504.
The selected separation secondary reduction iron series system of Raymond mill circular grinding includes that the centrifugation of sequentially connected 160 mesh second detaches dress
Set 601, Raymond mill circular grinding device 602, selected cyclic separation device 603, in recycle selecting device 604 and secondary reduction by force
Iron lifting device 605.
The multistage selected separation system of secondary reduction iron includes that sequentially connected 300 mesh centrifugation detaches the 701, second multistage of device
In strong selecting device 702, secondary reduction iron product warehouse 703.
Dedusting of negative pressure dedusting separation system includes sequentially connected ash disposal dust removal separation apparatus 801, negative pressure induced wind device 802
With electrostatic precipitator 803.
Coal-based direct reduction calcining kiln 201 is connected by heat source pipeline with fume afterheat heating and dehumidification device 101；Mixing
Transmission lifting device 103 is connected by the first transmission lifting device with 201 entrance of coal-based direct reduction calcining kiln；Coal base is direct
201 discharge port of reduction roasting kiln is connected by the second transmission lifting device with high intensity magnetic separation device 301 in primary；Strong magnetic in primary
The outlet of screening device 301 is connected with primary thickness separator 302 and the superpower concentration equipment 303 of rubidium iron boron respectively；Primary thickness
302 discharge port of separator detaches device 601 with the centrifugation of 160 mesh second respectively and is connected to roller circular grinding device 401, rubidium
The discharge port of the superpower concentration equipment 303 of iron boron is connected with reducing agent separation bin 304；To 401 discharge port of roller circular grinding device
It is connected with thickness cyclic separation device 402；Thickness cyclic separation device 402 recycles by force concentration equipment 403 and 160 in respectively
Mesh first centrifugation detach device 501 be connected, in recycle by force 403 discharge port of concentration equipment and once restore 404 phase of ferrikinetics storehouse
Connection；Primary reduction 404 discharge port of ferrikinetics storehouse is connected with primary reduction lifting device 405；Primary reduction lifting device 405
It is connected with to 401 feeding inlet of roller circular grinding device；The centrifugation of 160 mesh first detaches in 501 discharge port of device and the first multistage
Strong selecting device 502 is connected；In first multistage the outlet of strong selecting device 502 respectively with a reduced iron storage silo 503 and one
Secondary reduced iron substandard products warehouse 504 is connected；The centrifugation of 160 mesh second detaches 601 discharge port of device and Raymond mill circular grinding device
602 are connected；602 discharge port of Raymond mill circular grinding device is connected with selected cyclic separation device 603；Selected multi-cycle separation
603 discharge port of device recycles by force selecting device 604 in and is connected；In recycle selecting device 604 and secondary reduction by force and promoted and fill
605 are set to be connected；605 discharge port of secondary reduction lifting device is connected with 602 feeding inlet of Raymond mill circular grinding device；It is selected
The centrifugation of 603 discharge port of cyclic separation device and 300 mesh detaches that device 701 is connected, the centrifugation of 300 mesh detaches 701 discharge port of device
It is connected with selecting device 702 strong in the second multistage.
Dedusting of negative pressure dedusting separation system respectively with the selected extraction system of a reduced iron, Raymond mill circular grinding
Selected separation secondary reduction iron series system is connected with the multistage selected separation system of secondary reduction iron.
A kind of method of coal-based direct reduction baked for producing reduced iron:
1) feedstock processing:
Fume afterheat heating and dehumidifying system 101:
Including the preparation that 1. dehumidifies, 2. calcining kiln fume afterheat utilizes, 3. flue gas leads back device, 4. heating and dehumidification device.
1. dehumidifying prepares:, reducing agent coal slime moisture content 16%-higher due to shipping the general moisture content of iron oxide ore raw material
25%, daily 600 tons of iron ores and 160 mesh once restore 200 ton/days of iron powder mixings；Daily 52 tons of reducing agent coal slimes with 20 tons again
It is mixed using reducing agent, raw and auxiliary material can become bulk, convenient for going moisture removal preparation.
2. calcining kiln fume afterheat utilizes: due to 160-200 DEG C of calcining kiln flue-gas temperature, fume afterheat can remove completely former auxiliary
The moisture of material 15%, not only fume afterheat can be fully and rationally used, but also be remarkably improved direct-reduction roasting efficiency.
3. flue gas leads back device: hot fume being led back waste heat using air-introduced machine and heat source pipeline and is recycled, can be substantially reduced
Heat-energy losses reduce smoke discharge amount, and heat utilization rate is greatly improved.
4. heating and dehumidification device: using calcining kiln fume afterheat (flue-gas temperature 160 --- 200 DEG C) to iron oxide ore, also
Former agent coal slime is respectively heated dehumidifying, makes iron oxide ore free moisture < 12%, reducing agent moisture of coal fines < 12%, raw and auxiliary material
Direct-reduction roasting efficiency after moisture removal is gone to significantly improve > 15%, not only fume afterheat has obtained abundant efficient and rational utilization, and
And raw and auxiliary material is in bulk convenient for the progress of next step feeding.
Sieving approach storage system 102: including 1. 4 centimetres of screening plants, 2. jaw crusher, 3. reducing agent coal deposit
Storehouse, 4. iron oxide ore reserving chamber.
1. 4 centimetres of screening plants: filtering out 4 centimetres or less iron oxide ore raw materials so as to abundant reduction roasting.
2. Taw crushing apparatus: 4 centimetres of iron oxide ores of > are crushed to 4 centimetres of <, and to reach, directly sufficiently reduction is required.
3. reducing agent coal reserving chamber: to the requirement of reducing agent coal: 3 millimeters of coal particle <, sulfur-bearing < 0.4%, coal volatile matter > 6%
(waste material of volatile matter > 6 such as schlempe waste material, culled wood etc. is available, and being added 30% can reduce by 50% reducing agent coal consumption).
4. iron oxide ore reserving chamber: iron oxide ore will be shipped and screen broken heating and dehumidification, laid in herein so as to baked for producing
It uses.
Mixing transmits lifting system 103: including 1. mixing device, 2. mixing stock storehouse, 3. the first transmission lifting device.
1. mixing device: iron oxide ore and reducing agent coal are mixed so as to abundant reduction roasting.
2. mixing stock storehouse: mixing stock free moisture < 12%, deposit are used for roasting reduction herein.
3. the first transmission lifting device: mixing transmission is promoted to calcining kiln feeding inlet.
2) the iron oxide ore mixture is subjected to roasting reduction, the roasting by coal-based direct reduction calcining kiln
Temperature control is at 950-1020 DEG C, and reduction temperature is controlled at 900-950 DEG C, and exhaust gas temperature is at 160-200 DEG C；
- the second transmission lifting device: roasting material transmission is promoted to high intensity magnetic separation device 301 in primary.
3) reducing agent magnetic separation separation secondary reduction iron detaches system:
High intensity magnetic separation device 301 in primary:
Ferromagnetism reducing material is set sufficiently to recycle separation the roasting material after reduction roasting, so as to the superpower magnetic separation of rubidium iron boron point
From.
Primary thickness separator 302: secondary reduction iron is detached and is sufficiently separated with a reducing material.
The superpower concentration equipment 303 of rubidium iron boron: the superpower magnetic separation of rubidium iron boron makes waste material (having micromagnetism using waste material) and reducing agent
Coal is sufficiently separated, and reducing agent coal recycles, and reduces reducing agent cost.
Reducing agent separation bin 304: storage device after the separation of reducing agent coal goes secondary benefit again for 20 tons of reducing agent coal after separation
With reducing agent raw coal moisture is absorbed, so as to reduction roasting progress, other parts sale is also recycling.
4) a reduced iron system is separated to roller circular grinding magnetic separation:
To roller circular grinding device 401: twin rollers recycle reducing material levigate to 160 mesh of >, make reduced iron and major part
Impurity separation.
Thickness cyclic separation device 402: it is separated levigate in time to 160 mesh with last reducing material.
In recycle concentration equipment 403 by force: in recycle magnetic separation by force and separate waste material in time herein, reduce processing cost and mention
High circulation separative efficiency.
The primary reduction reducing material storage device of ferrikinetics storehouse 404: one times, so as to the grinding of frequency control reducing material uniform circulation
Magnetic separation separation.
Primary reduction lifting device 405: reducing material is promoted to roller circular grinding device by lifting device.
5) a selected extraction system of reduced iron:
The centrifugation of 160 mesh first detach the second centrifugal separating device of device 501:160 mesh by heavy metal reducing material and impurity and
Dust separation, most of impurity and dust centrifuge separation can remove, so as to Qiang Jingxuan in multistage.
Strong selecting device 502 in first multistage: strong selecting device in multistage, selected extract (meet production high-quality two
The raw material of secondary reduced iron solve the in great shortage problem of reduced iron raw material) reduced iron go secondary to restore upgrading.
Reduced iron storage silo 503: 160 mesh are chosen with last reduced iron storage device, are laid in herein so as to two
Secondary reduction uses.
Reduced iron substandard products warehouse 504: do not meet production high-quality secondary reduction iron a reduced iron (Iron grade:
Though Fe > 66% does not meet secondary reduction iron requirement, the good raw material of blast furnace ironmaking), thus can also be looked forward to for blast furnace ironmaking correlation
Industry provides matter high price excellent raw material.
6) the selected separation secondary reduction iron series system of Raymond mill circular grinding:
The centrifugation of 160 mesh second detaches device 601: the above secondary reduction material of 160 mesh being pumped into centrifugation using system negative pressure
It detaches device to be separated, obtains the above secondary reduction material of 160 mesh, due to impurity, dust specific gravity is small is drawn into ash disposal dedusting
System directly removes.
Raymond mill circular grinding device 602: Raymond mill is levigate to more than 300 mesh by 160 mesh secondary reduction iron materials, makes two
Secondary reduction iron granules is sufficiently separated with impurity.
The fine impurity of secondary reduction iron is taken out ash and removed by selected cyclic separation device 603:300 mesh centrifugal separating device, with
Just strong selected separation in multistage.
In recycle selecting device 604 by force: recycle by force selected in warp, choose high-quality secondary reduction iron.
Secondary reduction lifting device 605: reducing material is promoted to Raymond mill circular grinding device by lifting device.
7) the multistage selected separation system of secondary reduction iron:
The centrifugation of 300 mesh detaches device 701:300 mesh centrifugal separating device and the fine impurity of secondary reduction iron is taken out ash removing,
The strong multistage selected separation so as in.
Strong selecting device 702 in second multistage: strong selecting device in multistage, through selected upgrading synergy strong in multistage.
Secondary reduction iron product warehouse 703: secondary reduction iron packs storage after the assay was approved and prepares sale.
8) dedusting of negative pressure dust pelletizing system:
Ash disposal dust removal separation apparatus 801: each system major part dust removes herein and reduces air-introduced machine mill an ancient egg-shaped, holed wind instrument；
Negative pressure induced wind device 802: providing system negative pressure for each centrifugal separation system, creates negative pressure for magnetic concentration process
Advantage.
Electrostatic precipitator 803: electrostatic precipitation further improves efficiency of dust collection.
The above content is the further descriptions done in conjunction with specific preferred embodiment to the utility model, cannot
Assert that specific embodiment of the present utility model is only limitted to this, for the utility model person of an ordinary skill in the technical field
For, under the premise of not departing from the utility model, several simple deduction or replace can also be made, all shall be regarded as belonging to
The utility model determines scope of patent protection by the claims submitted.
Claims (4)
1. a kind of device of coal-based direct reduction baked for producing reduced iron, which is characterized in that straight including raw material processing system, coal base
Connect reduction roasting system, reducing agent magnetic separation separation secondary reduction iron detaches system, separates primary reduction to roller circular grinding magnetic separation
The selected separation secondary reduction iron series system of iron series system, the selected extraction system of a reduced iron, Raymond mill circular grinding, secondary reduction iron
Multistage selected separation system and dedusting of negative pressure dedusting separation system；
The raw material processing system includes sequentially connected fume afterheat heating and dehumidification device (101), sieving approach storage dress
Set (102) and mixing transmission lifting device (103)；
The coal-based direct reduction roasting system is coal-based direct reduction calcining kiln (201)；
It includes high intensity magnetic separation device in sequentially connected primary that the reducing agent magnetic separation separation secondary reduction iron, which detaches system,
(301), primary thickness separator (302), the superpower concentration equipment of rubidium iron boron (303), reducing agent separation bin (304)；
Described includes sequentially connected to roller circular grinding device to a roller circular grinding magnetic separation reduced iron system of separation
(401), thickness cyclic separation device (402), in recycle concentration equipment (403), primary reduction ferrikinetics storehouse (404), primary by force
It restores lifting device (405)；
Selected extraction system of reduced iron includes that the centrifugation of sequentially connected 160 mesh first detaches device (501), in the first multistage
Strong selecting device (502), reduced iron storage silo (503) He Yici reduced iron substandard products warehouse (504)；
The selected separation secondary reduction iron series system of the Raymond mill circular grinding includes that the centrifugation of sequentially connected 160 mesh second detaches
Device (601), Raymond mill circular grinding device (602), selected cyclic separation device (603), in recycle selecting device (604) by force
With secondary reduction iron lifting device (605)；
The multistage selected separation system of the secondary reduction iron includes that sequentially connected 300 mesh centrifugation detaches device (701), second
Strong selecting device (702), secondary reduction iron product warehouse (703) in multistage；
The coal-based direct reduction calcining kiln (201) passes through heat source pipeline and the fume afterheat heating and dehumidification device (101)
It is connected；Mixing transmission lifting device (103) is roasted by the first transmission lifting device and the coal-based direct reduction
Firing (201) entrance is connected；Coal-based direct reduction calcining kiln (201) discharge port by second transmission lifting device with
High intensity magnetic separation device (301) is connected in the primary；High intensity magnetic separation device (301) outlet is thick with primary respectively in the primary
Thin separator (302) is connected with the superpower concentration equipment of rubidium iron boron (303)；The primary thickness separator (302) goes out
Material mouth detaches device (601) with the centrifugation of 160 mesh second respectively and is connected to roller circular grinding device (401), the rubidium iron
The discharge port of the superpower concentration equipment of boron (303) is connected with reducing agent separation bin (304)；It is described to roller circular grinding device
(401) discharge port is connected with thickness cyclic separation device (402)；The thickness cyclic separation device (402) is respectively in
Strong circulation concentration equipment (403) and 160 mesh first be centrifuged detach device (501) be connected, it is described in recycle concentration equipment by force
(403) discharge port is connected with primary reduction ferrikinetics storehouse (404)；Primary reduction ferrikinetics storehouse (404) discharge port with
Primary reduction lifting device (405) is connected；The primary reduction lifting device (405) with to roller circular grinding device
(401) feeding inlet is connected；160 mesh first centrifugation detaches strong selected dress in device (501) discharge port and the first multistage
(502) are set to be connected；In first multistage outlet of strong selecting device (502) respectively with a reduced iron storage silo (503)
It is connected with a reduced iron substandard products warehouse (504)；Described 160 mesh second centrifugation detach device (601) discharge port with it is described
Raymond mill circular grinding device (602) be connected；Raymond mill circular grinding device (602) discharge port and selected circulation
Separator (603) is connected；Selected cyclic separation device (603) discharge port recycles by force selecting device (604) in
It is connected；Selecting device (604) is recycled in described by force to be connected with secondary reduction iron lifting device (605)；Described is selected
The centrifugation of cyclic separation device (603) discharge port and 300 mesh detaches that device (701) is connected, the 300 mesh centrifugation detaches device
(701) discharge port is connected with selecting device (702) strong in the second multistage；
The dedusting of negative pressure dedusting separation system is ground with the selected extraction system of a reduced iron, Raymond mill circulation respectively
Selected separation secondary reduction iron series system is ground to be connected with the multistage selected separation system of secondary reduction iron.
2. a kind of device of coal-based direct reduction baked for producing reduced iron according to claim 1, which is characterized in that described
Dedusting of negative pressure dedusting separation system include ash disposal dust removal separation apparatus (801), negative pressure induced wind device (802) and electrostatic precipitation dress
Set (803).
3. a kind of device of coal-based direct reduction baked for producing reduced iron according to claim 1, which is characterized in that described
The centrifugation of 160 mesh first detach device (501) and 160 mesh second and be centrifuged and detach device (601), using system negative pressure by 160 mesh
The above material detaches, and dust is extracted away, material needed for centrifugal gravity is isolated.
4. a kind of device of coal-based direct reduction baked for producing reduced iron according to claim 1, which is characterized in that described
Coal-based direct reduction calcining kiln (201) include it is snakelike heat channel and roasting reduction channel from top to bottom naturally upwards naturally,
It is described snakelike to heat channel upwards naturally roasting reduction channel is isolated from top to bottom naturally with described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821560855.XU CN209178420U (en) | 2018-09-25 | 2018-09-25 | A kind of device of coal-based direct reduction baked for producing reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821560855.XU CN209178420U (en) | 2018-09-25 | 2018-09-25 | A kind of device of coal-based direct reduction baked for producing reduced iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209178420U true CN209178420U (en) | 2019-07-30 |
Family
ID=67360190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821560855.XU Active CN209178420U (en) | 2018-09-25 | 2018-09-25 | A kind of device of coal-based direct reduction baked for producing reduced iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209178420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234486A (en) * | 2018-09-25 | 2019-01-18 | 张雷 | A kind of method and device thereof of coal-based direct reduction baked for producing reduced iron |
-
2018
- 2018-09-25 CN CN201821560855.XU patent/CN209178420U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109234486A (en) * | 2018-09-25 | 2019-01-18 | 张雷 | A kind of method and device thereof of coal-based direct reduction baked for producing reduced iron |
| CN109234486B (en) * | 2018-09-25 | 2023-04-11 | 张雷 | Method and device for producing reduced iron by coal-based direct reduction roasting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109234486A (en) | A kind of method and device thereof of coal-based direct reduction baked for producing reduced iron | |
| CN109013051B (en) | Method and device for producing high-nickel alloy by coal-based direct reduction and magnetic separation | |
| CN107523685B (en) | A kind of suspension roasting utilization system and method containing Ferromanganese Ore | |
| CN104694760B (en) | It is a kind of to handle the method and system that red mud reclaims Iron concentrate | |
| CN101862703B (en) | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite | |
| CN203728902U (en) | Integrated solid waste gas ash and zinc-containing ferrovanadium slag recovery device | |
| CN107460307B (en) | A kind of high-iron bauxite suspension roasting utilization system and method | |
| CN102399993B (en) | Method for treating waste residue from wet method gold smelting | |
| CN108380360B (en) | Production process of steel slag and iron fine powder | |
| CN101293281B (en) | Method for directly producing metallic iron powder with high-alumina iron ore | |
| CN107385199B (en) | A kind of hardly possible ore dressing magnetizing roast dry grinding dry separation craft | |
| CN102703714A (en) | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust | |
| CN105734192B (en) | A kind of mineral processing production method of low grade hematite | |
| CN103272711A (en) | Iron mine powder multi-level air classifying system and method | |
| CN209178420U (en) | A kind of device of coal-based direct reduction baked for producing reduced iron | |
| CN113684338A (en) | Device and method for optimizing iron ore through gas-based direct reduction and magnetic separation | |
| CN103555930A (en) | Method for reduction roasting of high-magnesium poor-quality nickel laterite | |
| CN103205584B (en) | Production device and production method of manganese monoxide mineral powder | |
| CN107881281B (en) | A kind of method that high-speed rail difficulty selects the rich sub- manganese powder of manganese ore deferrization production | |
| CN110369124A (en) | A kind of deironing apparatus that refractory material is novel and technique | |
| CN113699367A (en) | Method for optimizing low-grade laterite-nickel ore through gas-coal double-base direct reduction and magnetic separation | |
| CN215541565U (en) | Spodumene roasting material reducing mechanism | |
| CN115072730A (en) | Energy-saving process for calcining coal series kaolin by double kilns | |
| CN103589857A (en) | Full utilization method for middle and low-grade pyrite | |
| CN201250262Y (en) | System for producing iron ore concentrate by utilizing gold extraction waste slag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210226 Address after: NO.115, Qifu lane, Jincheng City, Shanxi Province Patentee after: Jincheng Weiqi nickel alloy technology development Co.,Ltd. Address before: NO.115, Qifu lane, West Street, Jincheng City, Shanxi Province 048000 Patentee before: Zhang Lei |
|
| TR01 | Transfer of patent right |