CN206902178U - A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization - Google Patents
A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization Download PDFInfo
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- CN206902178U CN206902178U CN201720755242.0U CN201720755242U CN206902178U CN 206902178 U CN206902178 U CN 206902178U CN 201720755242 U CN201720755242 U CN 201720755242U CN 206902178 U CN206902178 U CN 206902178U
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Abstract
A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, belongs to miberal powder Reduction on Fluidized Bed technical field.The utility model includes bimetallic tube reaction member, heating unit and material blending unit, bimetallic tube reaction member includes reaction inner tube and outer sleeve, inner tube set is reacted loaded on inside outer sleeve, and bottom of the tube is connected with outer sleeve bottom in reaction, fluidized bed sieve plate is provided with the reaction inner tube, described reaction inner tube is provided with reaction chamber feeding mouth close to one end of fluidized bed sieve plate, reaction chamber feeding mouth and fluidized bed sieve plate form encapsulation reaction chamber, Iron Ore Powder and anti-adhesion agent and are mixed in encapsulation reaction chamber, wrapped up, pre- cracking reaction.Iron Ore Powder of the present utility model and anti-adhesion agent are sufficiently mixed in encapsulation reaction intracavitary, anti-adhesion agent is coated on the surface of Iron Ore Powder, anti-adhesion agent forms uniform graphite or adhesion carbon on Iron Ore Powder surface, and iron whiskerses or iron atom can be avoided mutually to link reunion, can suppress Iron Ore Powder and cohere defluidization.
Description
Technical field
The utility model belongs to miberal powder Reduction on Fluidized Bed technical field, in particular, is related to a kind of Iron Ore Powder that suppresses and coheres
The fluidized reaction device and fluidized reaction method of defluidization.
Background technology
Fluid bed direct-reduction technique is an important breakthrough of field of metallurgy, because fluid bed does not have wanting for gas permeability
Ask, therefore can directly use the Iron Ore Powder that blast furnace, shaft furnace can not be used directly；Fluid bed iron-smelting process saves for ironmaking processes
Environmental protection, rationally provided using domestic low-grade, compositeon-silicon paragenetic and solving the problems, such as in terms of iron ore deposit is in short supply it is new
Smelting approach；Fluid bed direct-reduction technique not only expands the source of iron-smelting raw material, and reduces production cost, improves
The competitiveness of product.It is one of direction that following Iron industry develops directly using the fluid bed ironmaking technology of Iron Ore Powder, and
The key areas that various countries' steel and iron industry competitively researchs and develops at present.Austria, South Korea, Australia, Japan and other countries are through long
The developmental research of time, the new technology and equipment of the ironmaking of a variety of fluid beds are developed, wherein more famous and common are
FINMET techniques, FINEX techniques, DIOS techniques and HIsmelt techniques.
But Iron Ore Powder easily occurs cohering defluidization in high-temperature fluidizedization reduction process, reduces reduction efficiency, hinders stream
Journey continuous operation, this applies most important obstacle as fluidized bed iron making technology commercialization.In order to maintain normal operation, use
Less than 650 DEG C low temperature, high gas velocity, low percent reduction conditional operation, will cause reduction rate and production efficiency less, gas effciency
It is low, the increase of technique overall energy consumption.It is badly in need of developing a kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization, suppresses fluidization
The generation of defluidization is cohered in reduction process, and is provided fundamental basis and technology branch for Iron Ore Powder fluidized reduction skilled industry application
Support, and then, promote new and effective ironmaking technology.
Through retrieval, innovation and creation it is entitled：A kind of segmental fluidized bed and application method (application number：
201010602216.7 the applying date：2010.12.13), it includes feeding system, preheats hierarchy system, goes back original system, discharge system
System；Wherein feeding system includes storage tank and material spray gun, and preheating hierarchy system includes oxygen lance and preheating staged fluidized bed,
Preheating hierarchy system in preheating staged fluidized bed with go back the reduction fluid bed in original system using connect by the way of connect, discharge
System includes preheating staged fluidized bed discharge system and reduction fluid bed discharge system two parts, preheating staged fluidized bed discharge system
Middle granularity Iron Ore Powder and big granularity Iron Ore Powder are mainly discharged preheated fluidification bed by system, and reduction fluid bed discharge system is by after reduction
DRI discharge reduction fluid bed；Although the device can be directly using the smaller fine iron breeze of Iron Ore Powder and granularity；This
Outside, innovation and creation is entitled：A kind of high temperature fluidized bed testing device (application number of process charging：201020570114.7 Shen
Please day：2010.10.21), cyclone dust collectors are arranged at fluid bed body of heater upper port；Air inlet pipe is arranged at fluid bed bottom of furnace body；
The port of export of first, second grade of hopper is all provided with blanking valve, and the blanking valve of second level hopper is connected to stream by a connecting tube
Change pool furnace body, it is designed by two-stage loading hopper storehouse, realizes the process charging of high temperature fluidized bed reduced powder iron ore experiment, effectively
Fine ore caused explosion and reduction during fluid bed body of heater and heated by gas are prevented, while causes the charging of fine ore raw material more
It is smooth, it is therefore prevented that coal gas of high temperature playing a reversed role and leaking in fluidized-bed reactor.Above-mentioned technology is improved prior art, but
It is but to be difficult to effectively to suppress to cohere defluidization during reduction of iron ore fines.
Utility model content
1. utility model technical problems to be solved
The utility model is directed to the deficiency that defluidization has been cohered in Iron Ore Powder fluidizing reduction process in the prior art, there is provided
A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization；Iron Ore Powder and anti-adhesion agent are sufficiently mixed in encapsulation reaction intracavitary, are prevented
Glutinous agent is coated on the surface of Iron Ore Powder, and anti-adhesion agent forms uniform graphite or adhesion carbon on Iron Ore Powder surface, can avoid iron
Whisker or iron atom mutually link reunion, can suppress Iron Ore Powder and cohere defluidization.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the utility model is：
A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, including bimetallic tube reaction member,
The bimetallic tube reaction member includes reaction inner tube and outer sleeve, and reaction inner tube set is loaded on inside outer sleeve, and reacts inner tube
Bottom is connected with outer sleeve bottom, fluidized bed sieve plate is provided with the reaction inner tube, described reaction inner tube is close to fluidisation
One end of bed sieve plate is provided with reaction chamber feeding mouth, and the reaction chamber feeding mouth forms encapsulation reaction chamber, iron ore with fluidized bed sieve plate
Powder and anti-adhesion agent are mixed in encapsulation reaction chamber, wrapped up, pre- cracking reaction；And heating unit, the heating unit are used to add
Hot bimetallic tube reaction member；And material blending unit, material blending unit is used to mix Iron Ore Powder and anti-adhesion agent, after mixing
Iron Ore Powder and anti-adhesion agent add bimetallic tube reaction member.
Preferably, reaction chamber feeding mouth is provided with air flow guiding section close to the side of encapsulation reaction chamber, the air flow guiding section
Cross-sectional area be gradually reduced from the bottom to top.
Preferably, side of the reaction chamber feeding mouth away from encapsulation reaction chamber is provided with feeding mouth guide section, and the feeding mouth is led
The cross-sectional area of material section is from top to bottom gradually reduced.
Preferably, fluidized bed sieve plate includes outer rim stomata, middle stomata, inner edge stomata and centre porosity；Inner edge stomata, in
Between stomata and outer rim stomata from inside to outside successively circumference array on the outside of centre porosity.
Preferably, the aperture of outer rim stomata is more than the aperture of inner edge stomata, middle stomata and centre porosity.
Preferably, inner edge stomata is obliquely installed, and the angle of inner edge stomata axis and vertical direction is a, a：20-30°.
Preferably, the bottom of described reaction inner tube is provided with netted support grate plate, and pottery is equipped with the support grate plate
Porcelain ball.
Preferably, react and charging material chamber is provided with the top of inner tube, charge door is provided with the top of the charging material chamber；It is described
Charging material chamber be provided with going out gas branch pipe in the side wall at top.
Preferably, air intake branch is provided with the top of described outer sleeve, air inlet is provided with described air intake branch
Flow valve, the charge flow rate valve are used to regulate and control the charge flow rate of air intake branch.
3. beneficial effect
Using technical scheme provided by the utility model, compared with prior art, have the advantages that：
(1) a kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, including double-deck tube reaction list
Member, heating unit and material blending unit, Iron Ore Powder and anti-adhesion agent carry out being mixed and added into bimetallic tube anti-in material blending unit
Unit, Iron Ore Powder and anti-adhesion agent is answered to be sufficiently mixed in encapsulation reaction intracavitary, anti-adhesion agent is coated on the surface of Iron Ore Powder, and anti-adhesion agent exists
Iron Ore Powder surface forms uniform graphite or adhesion carbon, and iron whiskerses or iron atom can be avoided mutually to link reunion, can be pressed down
Iron Ore Powder processed coheres defluidization；
(2) a kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, reaction chamber feeding mouth are close
The side of encapsulation reaction chamber is provided with air flow guiding section, and the cross-sectional area of air flow guiding section is gradually reduced from the bottom to top, gas band
Team react compound encapsulation reaction intracavitary roll, when air-flow and reaction compound rise to reaction chamber feeding mouth when, in air-flow
In the presence of diversion section, in encapsulation reaction intracavitary convolution disturbance occurs for air-flow, and gas promotes the Iron Ore Powder in reaction compound
Mixed with anti-adhesion agent, and further promote the surface that anti-adhesion agent is coated on Iron Ore Powder；
(3) a kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, the aperture of outer rim stomata are big
In inner edge stomata, the flow velocity of the air-flow at edge is larger, and the air-flow at edge disturbs in air flow guiding section, promote Iron Ore Powder with
Mixing between anti-adhesion agent so that anti-adhesion agent is coated on the outside of Iron Ore Powder；
(4) a kind of suppression Iron Ore Powder of the present utility model coheres the fluidized reaction device of defluidization, is provided with telescoping mechanism
Fixed mechanism, can fix support platform and arbitrary height, experiment can stretch telescoping mechanism, and then lifting support after terminating
Platform, support platform drives bimetallic tube reaction member to move upwards, and bimetallic tube reaction member is taken out out of heating furnace burner hearth,
The cooling procedure of equipment is accelerated, improves conventional efficient；
Brief description of the drawings
Fig. 1 is dimensional structure diagram of the present utility model；
Fig. 2 is the structural representation of heating unit of the present utility model；
Fig. 3 is cross-sectional view of the present utility model；
Fig. 4 is overlooking the structure diagram of the present utility model；
Fig. 5 is a kind of fluidized reaction device overall schematic for suppressing Iron Ore Powder and cohering defluidization of the present utility model；
Fig. 6 is the diagrammatic cross-section of fluidized bed sieve plate of the present utility model；
Fig. 7 is the structural representation of fluidized bed sieve plate of the present utility model.
Label declaration in schematic diagram
100th, bimetallic tube reaction member；110th, inner tube is reacted；111st, charging material chamber；112nd, going out gas branch pipe；113rd, inner tube pressure
Power meter；114th, fluidized bed sieve plate；1141st, outer rim stomata；1142nd, middle stomata；1143rd, inner edge stomata；1144th, centre porosity；
115th, charge door；1151st, observation panel；116th, grate plate is supported；117th, Ceramic Balls；120th, outer sleeve；121st, air intake branch；122、
Charge flow rate valve；123rd, overcoat tube manometer；124th, cooling copper tube；130th, support platform；131st, telescoping mechanism；141st, upper method
It is blue；142nd, lower flange；150th, reaction chamber feeding mouth；151st, feeding mouth guide section；152nd, pan feeding aditus laryngis；153rd, air flow guiding section；
160th, encapsulation reaction chamber；
200th, heating unit；210th, heating furnace body；211st, heating furnace burner hearth；212nd, body of heater top surface；
300th, material blending unit；310th, tank is mixed；320th, agitator.
Embodiment
Accompanying drawing hereafter with reference to the detailed description of exemplary embodiment of the present utility model, the accompanying drawing forms the one of description
Part, show the enforceable exemplary embodiment of the utility model as example in the figure.Although these exemplary realities
Apply example to be described in sufficient detail to enable those skilled in the art to implement the utility model, it is to be understood that it can be realized
His embodiment and can various changes can be made to the utility model in the case where not departing from spirit and scope of the present utility model.Hereafter
Required the scope of the utility model is not limited to the more detailed description of embodiment of the present utility model, and only
It is of the present utility model to propose to perform in order to be illustrated and not limit the characteristics of to the utility model and the description of feature
Best mode, and be sufficient so that those skilled in the art and can implement the utility model.Therefore, the scope of the utility model only by
Appended claims limit.
Hereafter detailed description of the present utility model and example embodiment can be more fully understood with reference to accompanying drawing, wherein this reality
Identified with new element and feature by reference.
Embodiment 1
With reference to Fig. 1, Fig. 2 and Fig. 5, a kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization of the present utility model, bag
Include bimetallic tube reaction member 100, heating unit 200 and material blending unit 300；As shown in figure 5, material blending unit 300 is used
In by Iron Ore Powder and anti-adhesion agent mixing, Iron Ore Powder and anti-adhesion agent after mixing add bimetallic tube reaction member 100；The material mixes
Unit 300 includes mixing tank 310 and agitator 320, and Iron Ore Powder and anti-adhesion agent are added to and mixed in tank 310, opens agitator
320 are mixed.
The bimetallic tube reaction member 100 of the present embodiment includes reaction inner tube 110, outer sleeve 120 and support platform 130,
The described middle part of support platform 130 offers the through hole being engaged with outer sleeve 120, and it is flat that outer sleeve 120 is fixed on support
The middle part of platform 130；The internal diameter of described outer sleeve 120 is more than the external diameter of reaction inner tube 110, and the reaction inner tube 110 is set in
Inside outer sleeve 120, and react the bottom of inner tube 110 and be connected (as shown in Figure 1) with the bottom of outer sleeve 120, in the reaction
Fluidized bed sieve plate 114 is provided with pipe 110, and the sieve diameter of fluidized bed sieve plate 114 is less than the diameter of Iron Ore Powder, so as to avoid iron
Miberal powder falls into the bottom (as shown in Figure 3) of reaction inner tube 110, and fluidized bed sieve plate 114 is provided with the reaction inner tube 110, described
Reaction inner tube 110 one end of fluidized bed sieve plate 114 is provided with reaction chamber feeding mouth 150, the reaction chamber feeding mouth 150 with
Fluidized bed sieve plate 114 forms encapsulation reaction chamber 160, Iron Ore Powder and anti-adhesion agent and is mixed in encapsulation reaction chamber 160, wrapped up, in advance
Cracking reaction.The top of reaction inner tube 110 is provided with charging material chamber 111, and the top of the charging material chamber 111 is provided with charge door
115, opening charge door 115 can expect to add iron ore powder raw material in chamber 111 to charging.It is provided with the side wall of charging material chamber 111
Inner tube pressure meter 113, the inner tube pressure meter 113 is used to detect charging material chamber 111 and reacts the gas pressure of inner tube 110, and ties
Closing overcoat tube manometer 123 can be with analytical reactions inner tube 110 and the pressure differential of outer sleeve 120.
The reaction chamber feeding mouth 150 of the present embodiment includes feeding mouth guide section 151, pan feeding aditus laryngis 152 and air flow guiding section
153；Feeding mouth guide section 151 is connected by pan feeding aditus laryngis 152 with air flow guiding section 153；Specific description：Reaction chamber feeding mouth
150 are provided with air flow guiding section 153 close to the side of encapsulation reaction chamber 160, the cross-sectional area of the air flow guiding section 153 by it is lower extremely
On be gradually reduced, the shaft section of air flow guiding section 153 is a cancave cambered surface, when by bottom blown gas, gas lead group of people reaction mixing
Material is rolled in the encapsulation reaction chamber 160, when air-flow and reaction compound rise to reaction chamber feeding mouth 150, in air flow guiding
In the presence of section 153, convolution disturbance occurs in encapsulation reaction chamber 160 for air-flow, and gas promotes the iron ore in reaction compound
Powder is mixed with anti-adhesion agent, and further promotes the surface that anti-adhesion agent is coated on Iron Ore Powder, so as to effectively avoid
Iron Ore Powder coheres defluidization in reduction process.
Side of the reaction chamber feeding mouth 150 away from encapsulation reaction chamber 160 is provided with feeding mouth guide section 151, the feeding mouth
The cross-sectional area of guide section 151 is from top to bottom gradually reduced, and the bottom of feeding mouth guide section 151 passes through pan feeding aditus laryngis 152 and air-flow
Diversion section 153 is connected.The shaft section of feeding mouth guide section 151 is inclined-plane, and the angle of the inclined-plane and vertical direction is b, and b is
30-60 °, preferably 45 °；Feeding mouth guide section 151 promotes reaction compound and added in encapsulation reaction chamber 160, and promotes
Gas is mixed and coated in encapsulation reaction chamber 160.
The top of the outer sleeve 120 of the present embodiment is provided with air intake branch 121, and air inlet is provided with air intake branch 121
Flow valve 122, the charge flow rate valve 122 are used to regulate and control the charge flow rate of air intake branch 121, and the top of outer sleeve 120 is set
There is overcoat tube manometer 123, the overcoat tube manometer 123 is used to monitor the pressure in outer sleeve 120.Can be in the bar of pressurization
To the fluidized reduction of Iron Ore Powder under part, defluidization is cohered in reduction process so as to suppress Iron Ore Powder.Charging material chamber 111 is close
Going out gas branch pipe 112 is provided with the side wall at top, reacted gas can be discharged by going out gas branch pipe 112, going out gas branch pipe 112 and pipe
Road is connected, so as to which reacted gas to be expelled to safe region.
Heating unit 200 is used to heat bimetallic tube reaction member 100, and heating unit 200 includes heating furnace body 210, should
The heating furnace burner hearth 211 being engaged with outer sleeve 120 is provided with heating furnace body 210, i.e. heating furnace burner hearth 211 is vertical
The tubular structure of setting.Outer sleeve 120 can be installed in heating furnace burner hearth 211, and in heating furnace burner hearth 211 to outer cover
Pipe 120 is heated (as shown in Figure 2), i.e., bimetallic tube reaction member 100 is engaged with heating furnace burner hearth 211, double-deck tube reaction
Unit 100 is arranged in heating furnace burner hearth 211, and heating furnace burner hearth 211 can heat to bimetallic tube reaction member 100.
Telescoping mechanism 131, i.e. telescoping mechanism are provided between the support platform 130 and heating furnace body 210 of the present embodiment
131 tops are connected with the lower surface of support platform 130, and the bottom of telescoping mechanism 131 is connected with body of heater top surface 212, telescoping mechanism 131
It can occur between support platform 130 and body of heater top surface 212 flexible.Telescoping mechanism 131 is used to adjust bimetallic tube reaction member
100 load depth in burner hearth, and fixed mechanism is provided with the telescoping mechanism 131, so as to by support platform 130 fix with
Arbitrary height.In addition, experiment can stretch telescoping mechanism 131, and then lifting support platform 130, the band of support platform 130 after terminating
Dynamic bimetallic tube reaction member 100 moves upwards, and bimetallic tube reaction member 100 is taken out out of heating furnace burner hearth 211, Jin Erjia
The speed cooling procedure of equipment, so as to improving conventional efficient.
More importantly can be by adjusting the height of telescoping mechanism 131, to adjust fluidized bed sieve plate 114 in heating-furnace
Position in thorax 211, heating furnace burner hearth 211 are the tubular structure being vertically arranged, and heating furnace burner hearth 211 has in vertical height
Different temperature fields, the heating furnace burner hearth 211 of the present embodiment includes at least two constant temperature sections, wherein low constant temperature intervals control
To 300-350 DEG C；High constant temperature intervals control is to 800-900 DEG C.By adjusting fluidized bed sieve plate 114 in heating furnace burner hearth 211
Position, different temperatures of the Iron Ore Powder in the temperature field of heating furnace burner hearth 211 can be adjusted, and then Iron Ore Powder can be simulated not
Reduction reaction process under synthermal.
Being added by the top of reaction inner tube 110 includes the reaction compound of Iron Ore Powder and anti-adhesion agent, and to outer sleeve 120
In be blown into N2Or inert gas, N2Or inert gas is entered in reaction by bottom of the outer sleeve 120 through outer sleeve 120
Pipe 110, and the encapsulation reaction chamber 160 of bimetallic tube reaction member 100 is pushed into low 300-350 DEG C of constant temperature section, gas is led group of people
React compound to roll in encapsulation reaction chamber 160, in the presence of air flow guiding section 153, air-flow is in encapsulation reaction chamber 160
Generation convolution disturbance, N2Or inert gas carries out discontinuity air blowing, avoid anti-adhesion agent from being layered with Iron Ore Powder, promote anti-adhesion agent bag
Overlay on the surface of Iron Ore Powder；Encapsulation reaction chamber 160 is then pushed between paramount flat-temperature zone 800-900 DEG C, continues N2Or inertia
Gas carries out discontinuity air blowing, and controls low gas velocity, and pre- cracking occurs for the molding powder in anti-adhesion agent under the high temperature conditions, is cracking
During anti-adhesion agent be further coated on the surface of Iron Ore Powder, to prevent that cohering defluidization provides during reduction of iron ore fines
Basis.Then high constant temperature section is cooled to 700-750 DEG C, and reaction inner tube 110 is forced into 0.15MPa, and into outer sleeve 120
Reducibility gas is filled with, reducibility gas enters reaction inner tube 110, this mistake by bottom of the outer sleeve 120 through outer sleeve 120
Gas heating unit 200 heats to reducibility gas (such as coal gas, CO etc.) in journey, effectively to fluidization reduction of iron ore
Reducibility gas during powder is heated, reducibility gas continue up and on fluidized bed sieve plate 114 with iron ore
Powder contact, concurrently give birth to reduction reaction, be coated under elevated pressure conditions Iron Ore Powder surface anti-adhesion agent reaction produce produce graphite or
Person adheres to carbon anti-adhesion agent in the surface of Iron Ore Powder, reduction process and uniform graphite or adhesion carbon is formed on Iron Ore Powder surface,
So as to avoid iron whiskerses or iron atom from mutually linking reunion, particle is avoided to occur cohering phenomenon.After the completion of reaction, one can be entered
The lifting support platform 130 of step, and bimetallic tube reaction member 100 is accelerated into cooling completely by being taken out out of heating furnace burner hearth 211
Process, improve conventional efficient.
Embodiment 2
The substance of the present embodiment is with embodiment 1, its difference：The bottom of reaction inner tube 110 is provided with net
The support grate plate 116 of shape, Ceramic Balls 117 is equipped with the support grate plate 116, described Ceramic Balls 117 are arranged to 3-5 layers (such as
Shown in Fig. 3), preferably 3 layers, after gas flows through multi-layer ceramics ball 117, Ceramic Balls 117 may be such that air-flow is uniformly distributed in reaction
In pipe 110.
As shown in Figure 6 and Figure 7, fluidized bed sieve plate 114 includes outer rim stomata 1141, middle stomata 1142, inner edge stomata
1143 and centre porosity 1144；Inner edge stomata 1143, middle stomata 1142 and outer rim stomata 1141 Circle-Array successively from inside to outside
It is listed in the outside of centre porosity 1144；The aperture of outer rim stomata 1141 is more than inner edge stomata 1143, middle stomata 1142 and central gas
The aperture in hole 1144；Ceramic Balls 117 first cause air-flow to be uniformly distributed in reaction inner tube 110, then the hole of outer rim stomata 1141
Footpath is larger so that the flow velocity of the air-flow at edge is larger, and the air-flow at edge disturbs in air flow guiding section 153, promotes iron ore
Mixing between powder and anti-adhesion agent so that anti-adhesion agent is coated on the outside of Iron Ore Powder.In addition, inner edge stomata 1143 is obliquely installed,
I.e. inner edge stomata 1143 is obliquely installed to outer rim stomata 1141 from the bottom to top along vertical direction；The axis of inner edge stomata 1143 with
The angle of vertical direction is a, a：20-30 °, preferably 25 °；Inner edge stomata 1143, which is obliquely installed, further promotes disturbing for gas
It is dynamic so that Iron Ore Powder is sufficiently mixed with anti-adhesion agent, and under conditions of high temperature so that anti-adhesion agent is sufficiently uniformly coated on iron
The surface of miberal powder, forms uniform, stable absorption carbon for subsequently on Iron Ore Powder surface and graphite provides basis, so as to inhibit iron
Miberal powder coheres defluidization during reduction.
Embodiment 3
With embodiment 1, difference is the substance of the present embodiment：The top of charge door 115 is provided with transparent sight
Examine mouth 1151, can by the fluidized reduction process of the Iron Ore Powder of 1151 observing response inner tube of observation panel 110, so as to it is more directly perceived,
The accurately fluidized reduction process (as shown in Figure 4) of research Iron Ore Powder.
Embodiment 4
With embodiment 1, difference is the substance of the present embodiment：Support platform 130 and overcoat tube manometer 123
Between outer sleeve 120 on be provided with cooling copper tube 124, cooling copper tube 124 is used to outer sleeve 120 is forced to cool down, main
If the top of outer sleeve 120 is provided with detection device, if not carrying out compulsory water cooling to outer sleeve 120, easily cause
The temperature of outer sleeve 120 is too high and breakage detection device.
The reaction inner tube 110 of the present embodiment is not provided with upper flange 141 close to the outer of top, upper flange 141 with reaction
The external stability connection of pipe 110, the top of outer sleeve 120 are provided with lower flange 142, lower flange 142 and outer sleeve 120
Top is fixedly connected with；The lower flange 142 is engaged with upper flange 141, and reaction inner tube 110 is outside by the insertion of the top of outer sleeve 120
Sleeve pipe 120, and matched using lower flange 142 with upper flange 141 and be merged into capable sealing, so as to avoid that gas leakage occurs, improve
Security, and be engaged using lower flange 142 with upper flange 141, so as to improving the efficiency of assembling (as shown in Figure 3).
Embodiment 5
A kind of suppression Iron Ore Powder of the present embodiment coheres the fluidized reaction method of defluidization, and Iron Ore Powder and anti-adhesion agent are added to
Material blending unit 300 is carried out being uniformly mixed so as to obtain reaction compound, then reaction compound is added into bimetallic tube reaction member 100
React in inner tube 110, the reacted chamber feeding mouth 150 of reaction compound after being mixed in reacting inner tube 110 enters encapsulation reaction
Chamber 160；Heating unit 200 heats bimetallic tube reaction member 100, and mixing, bag occur for reaction compound in encapsulation reaction chamber 160
Wrap up in, pre- cracking reaction；Further heat up and reducibility gas is filled with into bimetallic tube reaction member 100, Iron Ore Powder is anti-in cladding
Reduction on Fluidized Bed reaction occurs under conditions of glutinous agent.Detailed is described as follows：
Step 1：Iron Ore Powder mixes with anti-adhesion agent
Iron Ore Powder and anti-adhesion agent distribution are dried, and Iron Ore Powder and anti-adhesion agent are added to the mixing of material blending unit 300
In tank 310, in the presence of agitator 320, Iron Ore Powder is sufficiently mixed to obtain reaction compound with anti-adhesion agent；Wherein：Iron Ore Powder
Granularity be 0.8-1.0mm；The granularity of described anti-adhesion agent is 0.18-0.66mm；Anti-adhesion agent accounts for reaction compound gross mass
8%-12%, i.e. anti-adhesion agent account for the 8%-12% of Iron Ore Powder and anti-adhesion agent gross mass, and this implementation is preferably 8%；The waste plastics
For non-chlorine molding powder containing energy, the molding powder that the present embodiment uses is polyethylene.
Step 2：Coat advance cracking reaction
Reaction compound is added in reaction inner tube 110 by charging material chamber 111, reaction compound expects chamber 111 by charging
Reacted chamber feeding mouth 150 is flowed in encapsulation reaction chamber 160；And it is blown into N into outer sleeve 1202Or inert gas, this
Embodiment is high-purity N2, N2Reaction inner tube 110 is entered by bottom of the outer sleeve 120 through outer sleeve 120, and bimetallic tube is anti-
The encapsulation reaction chamber 160 of unit 100 is answered to push between paramount flat-temperature zone 800-900 DEG C, preferably 850 DEG C；Discontinuity advertises N2Gas,
And gas flow rate is 0.3-0.5m/s, preferably 0.4m/s, reaction time 10min；In encapsulation reaction chamber 160, in gas
Blow lower anti-adhesion agent to be sufficiently mixed with Iron Ore Powder so that anti-adhesion agent is coated on the surface of Iron Ore Powder, and anti-stick under the high temperature conditions
Pre- cracking occurs for the molding powder in agent, and anti-adhesion agent is further coated on the surface of Iron Ore Powder during cracking, is iron ore
Prevent that cohering defluidization provides the foundation in powder reduction process；Wherein described discontinuity advertises N2Gas can be described as：Often blast
40s N2After gas, 20s is stood, stopping blasts N2Gas.
Step 3：Reduction of iron ore fines reacts
High constant temperature section is cooled to 700-750 DEG C, preferably 750 DEG C；Reaction inner tube 110 is forced into 0.15MPa, and to outside
Reducibility gas is filled with sleeve pipe 120, the reducibility gas of the present embodiment is 70%H2+ 30%N2, the reaction of Iron Ore Powder Reduction on Fluidized Bed
During reducibility gas flow velocity be 0.75-0.85m/s, preferably 0.75m/s, reducibility gas is by outer sleeve 120 through outside
The bottom of sleeve pipe 120 enters reaction inner tube 110, and gas heating unit 200 heats to reducibility gas during this, effectively
Ground is heated to the reducibility gas during fluidization reduced iron miberal powder, and reducibility gas is continued up and fluidized
Contacted on bed sieve plate 114 with Iron Ore Powder, concurrently give birth to reduction reaction, recovery time 50min.
Reaction finds that Iron Ore Powder does not have to cohere phenomenon after terminating, and detects reacted sample, wherein sample metal
Rate reaches 83.12%, and the anti-adhesion agent reaction for being coated on Iron Ore Powder surface under elevated pressure conditions produces graphite or adhesion carbon
On the surface of Iron Ore Powder, and under high-temperature and high-pressure conditions, anti-adhesion agent forms uniform graphite or adhesion carbon on Iron Ore Powder surface,
So as to avoid iron whiskerses or iron atom from mutually linking reunion, particle is avoided to occur cohering phenomenon.
In addition, molding powder is polyethylene, polypropylene, polystyrene, polyformaldehyde, polyamide, makrolon, polymethyl
Any of sour methyl esters, polyester or a variety of mixtures.
The utility model is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can be
Various modifications and variations are carried out in the case of not departing from the scope of the utility model being defined by the following claims.Detailed retouches
State should be to be considered only as with accompanying drawing it is illustrative and not restrictive, if there is any such modifications and variations, then
They are fallen within the scope of the utility model described here.In addition, background technology is intended to illustrate grinding for this technology
It was found that shape and meaning, it is no intended to limit the utility model or the application and application field of the present utility model.
More specifically, although exemplary embodiment of the present utility model has been described herein, but the utility model is simultaneously
These embodiments are not limited to, but are repaiied including the process that those skilled in the art can be appreciated that according to detailed description above
Change, omit, the combination between for example each embodiment, any and whole embodiments of adaptive change and/or replacement.Right will
The restriction asked can widely be explained according to the language used in claim, and be not limited in foregoing detailed description
Or the example described during this application is implemented, these examples are considered as nonexcludability.It is in office where method or process power
Any step that profit is enumerated in requiring can in any order perform and be not limited to the order proposed in claim.Therefore,
The scope of the utility model should determine only by appended claims and its legal equivalents, rather than by theory given above
Bright and example determines.
Claims (9)
- A kind of 1. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization, it is characterised in that：IncludingBimetallic tube reaction member (100), the bimetallic tube reaction member (100) include reaction inner tube (110) and outer sleeve (120), react inner tube (110) and be set in outer sleeve (120) inside, and react inner tube (110) bottom and outer sleeve (120) Bottom is connected, and fluidized bed sieve plate (114) is provided with the reaction inner tube (110), described reaction inner tube (110) is close to fluidisation One end of bed sieve plate (114) is provided with reaction chamber feeding mouth (150), the reaction chamber feeding mouth (150) and fluidized bed sieve plate (114) Form encapsulation reaction chamber (160), Iron Ore Powder and anti-adhesion agent are mixed in encapsulation reaction chamber (160), wrapped up, pre- cracking reaction； AndHeating unit (200), the heating unit (200) are used to heat bimetallic tube reaction member (100)；AndMaterial blending unit (300), material blending unit (300) are used to mix Iron Ore Powder and anti-adhesion agent, the iron ore after mixing Powder and anti-adhesion agent add bimetallic tube reaction member (100).
- A kind of 2. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 1, it is characterised in that：Reaction Chamber feeding mouth (150) is provided with air flow guiding section (153) close to the side of encapsulation reaction chamber (160), the air flow guiding section (153) Cross-sectional area be gradually reduced from the bottom to top.
- A kind of 3. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 1, it is characterised in that：Reaction Side of the chamber feeding mouth (150) away from encapsulation reaction chamber (160) is provided with feeding mouth guide section (151), the feeding mouth guide section (151) cross-sectional area is from top to bottom gradually reduced.
- 4. a kind of suppression Iron Ore Powder according to claim any one of 1-3 coheres the fluidized reaction device of defluidization, its feature It is：Fluidized bed sieve plate (114) includes outer rim stomata (1141), middle stomata (1142), inner edge stomata (1143) and central gas Hole (1144)；Inner edge stomata (1143), middle stomata (1142) and outer rim stomata (1141) from inside to outside successively circumference array in On the outside of centre porosity (1144).
- A kind of 5. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 4, it is characterised in that：Outer rim The aperture of stomata (1141) is more than the aperture of inner edge stomata (1143), middle stomata (1142) and centre porosity (1144).
- A kind of 6. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 4, it is characterised in that：Inner edge Stomata (1143) is obliquely installed, and the angle of inner edge stomata (1143) axis and vertical direction is a, a：20-30°.
- 7. a kind of suppression Iron Ore Powder according to claim any one of 5-6 coheres the fluidized reaction device of defluidization, its feature It is：The bottom of described reaction inner tube (110) is provided with netted support grate plate (116), is laid in the support grate plate (116) There are Ceramic Balls (117).
- A kind of 8. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 7, it is characterised in that：Reaction Charging material chamber (111) is provided with the top of inner tube (110), charge door (115) is provided with the top of the charging material chamber (111)；Institute The charging material chamber (111) stated is provided with going out gas branch pipe (112) in the side wall at top.
- A kind of 9. fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization according to claim 7, it is characterised in that：It is described Outer sleeve (120) at the top of be provided with air intake branch (121), described air intake branch is provided with charge flow rate on (121) Valve (122), the charge flow rate valve (122) are used to regulate and control the charge flow rate of air intake branch (121).
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| CN201720755242.0U CN206902178U (en) | 2017-06-27 | 2017-06-27 | A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization |
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| CN201720755242.0U CN206902178U (en) | 2017-06-27 | 2017-06-27 | A kind of fluidized reaction device for suppressing Iron Ore Powder and cohering defluidization |
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| CN206902178U true CN206902178U (en) | 2018-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114410872A (en) * | 2022-01-24 | 2022-04-29 | 安徽工业大学 | Method for inhibiting bonding loss in fluidized reduction process of iron ore powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114410872A (en) * | 2022-01-24 | 2022-04-29 | 安徽工业大学 | Method for inhibiting bonding loss in fluidized reduction process of iron ore powder |
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