CN105936951A - System and method for processing high-phosphorus iron ore - Google Patents
System and method for processing high-phosphorus iron ore Download PDFInfo
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- CN105936951A CN105936951A CN201610466771.9A CN201610466771A CN105936951A CN 105936951 A CN105936951 A CN 105936951A CN 201610466771 A CN201610466771 A CN 201610466771A CN 105936951 A CN105936951 A CN 105936951A
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- iron ore
- reducing agent
- phosphorus iron
- stove
- standing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
Abstract
The invention discloses a system and method for processing high-phosphorus iron ore. The system comprises a high-phosphorus iron ore crushing device provided with a high-phosphorus iron ore inlet and a high-phosphorus iron ore crushing outlet, a reducing agent crushing device provided with a reducing agent inlet and a reducing agent crushing outlet, a gasification revolving bed, a water quenching device and an ore grinding and magnetic separating device. The gasification revolving bed comprises a high-phosphorus iron ore furnace disc, a reducing agent furnace disc, a high-phosphorus iron ore crushing inlet, a reducing agent crushing inlet, a reducing gas inlet and a reduction product outlet, the high-phosphorus iron ore crushing inlet is connected with the high-phosphorus iron ore crushing outlet, and the reducing agent crushing inlet is connected with the reducing agent crushing outlet. The water quenching device is provided with a solid reduction product inlet and a post-water-quenching reduction product outlet, and the solid reduction product inlet is connected with a solid reduction product outlet. The ore grinding and magnetic separating device is provided with a post-water-quenching reduction product inlet, an iron powder outlet and a tailing outlet, and the post-water-quenching reduction product inlet is connected with the post-water-quenching reduction product outlet. By means of the system, efficient processing can be conducted on the high-phosphorus iron ore, and the grade of obtained iron powder is high.
Description
Technical field
The invention belongs to metallurgical metal field, specifically, the present invention relates to a kind of system processing high-phosphorus iron ore and side
Method.
Background technology
Along with the development of world steel industry, substantial amounts of high-quality iron ore is by depleted, and iron ore inferior is not the most real
The most effectively utilize.Wherein high-phosphorus iron ore is the one of iron ore inferior, belongs to phosphorus associated minerals, and its disseminated grain size is thin and mutual
Parcel, it is difficult to dissociating, phosphorus is mainly scattered in iron mineral, removing difficulty, the utilization causing this type of ore deposit is little.
China's high-phosphorus iron ore is the abundantest, if a kind of technology and good in economic efficiency process can be found, must solve China
The supply problem of ironmaking Ore.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose a kind of system and method processing high-phosphorus iron ore, uses this system can be efficiently treated through high-phosphorus iron ore,
And gained iron powder has relatively high-grade.
In one aspect of the invention, the present invention proposes a kind of system processing high-phosphorus iron ore.According to embodiments of the invention,
This system includes:
High-phosphorus iron ore breaker, described high-phosphorus iron ore breaker has high-phosphorus iron ore entrance and the outlet of high-phosphorus iron ore broken material；
Reducing agent breaker, described reducing agent breaker has reducing agent entrance and the outlet of reducing agent broken material；
Gasification revolving bed, described gasification revolving bed includes:
High-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire, described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is spindle rotationally arranged in inside described gasification revolving bed, and edge
The rotation direction of described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire, described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is disposed with high-phosphorus iron ore feed zone,
High-phosphorus iron ore reducing zone and solid reduction product discharge zone, on the gasification revolving bed sidewall of described high-phosphorus iron ore feed zone
Being provided with high-phosphorus iron ore broken material entrance, described high-phosphorus iron ore broken material entrance exports phase with described high-phosphorus iron ore broken material
Even, the gasification revolving bed sidewall of described solid reduction product discharge zone arranges solid reduction product outlet, described
The first through hole it is provided with on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire；
Reducing agent stone or metal plate for standing a stove on as a precaution against fire, described reducing agent stone or metal plate for standing a stove on as a precaution against fire is spindle rotationally arranged in described gasification revolving bed inside and is positioned at described height
The lower section of fosfosiderite stone or metal plate for standing a stove on as a precaution against fire, and along the rotation direction of described reducing agent stone or metal plate for standing a stove on as a precaution against fire, described reducing agent stone or metal plate for standing a stove on as a precaution against fire sets successively
Being equipped with slag discharge zone after reducing agent feed zone, reducing agent reducing zone and reduction, the gasification at described reducing agent feed zone is revolved
Being provided with reducing agent broken material entrance on rotated bed sidewall, described reducing agent broken material entrance goes out with described reducing agent broken material
Mouth is connected, and arranges slag outlet after reduction, described reduction after described reduction on the gasification revolving bed sidewall of slag discharge zone
The second through hole it is provided with on agent stone or metal plate for standing a stove on as a precaution against fire；
Multiple radiation heating tubes, the plurality of radiation heating tube is arranged on the inwall of described gasification revolving bed；
Reducing gases entrance, described reducing gases entrance is arranged on the bottom of described gasification revolving bed and is positioned at described reducing agent stove
The lower section of dish；
Offgas outlet, described offgas outlet is arranged on the top of described gasification revolving bed and is positioned at described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire
Top；
Granulating unit, described granulating unit has reduzate outlet after solid reduction product entrance and shrend, and described solid is also
Former product inlet is connected with the outlet of described solid reduction product；
Mill ore magnetic selection device, described mill ore magnetic selection device has reduzate entrance after shrend, iron powder outlet and mine tailing outlet,
After described shrend, reduzate entrance is connected with reduzate outlet after described shrend.
Thus, the system processing high-phosphorus iron ore according to embodiments of the present invention is by being respectively provided with high ferrophosphorus in gasification revolving bed
Ore deposit stone or metal plate for standing a stove on as a precaution against fire and reducing agent stone or metal plate for standing a stove on as a precaution against fire, and high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and reducing agent not
Directly contact so that the reducing agent arranged on reducing agent stone or metal plate for standing a stove on as a precaution against fire generating gasification reaction under the effect of reducing gases obtains containing an oxygen
Changing gas after the reduction of carbon and hydrogen, after this reduction, gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction instead
Should, such that it is able to significantly improve reduction effect, more existing employing reducing agent mixes the side carrying out reducing with high-phosphorus iron ore simultaneously
Formula is compared, and the reducing agent in the application is not directly contacted with high-phosphorus iron ore, so that the impurity in reducing agent i.e. harmful element
As S, P etc. will not enter in the material after reduction, and then i.e. can get low-phosphorous high-grade through follow-up shrend and mill ore magnetic selection
Iron powder.
It addition, the system of process high-phosphorus iron ore according to the above embodiment of the present invention can also have a following additional technical characteristic:
In some embodiments of the invention, the vertical dimension between described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and described reducing agent stone or metal plate for standing a stove on as a precaution against fire is
300～1000mm.Thus, it is possible to significantly improve the reduction effect of high-phosphorus iron ore.
In some embodiments of the invention, the diameter of described first through hole and the second through hole is separately 2～8mm.By
This, can improve the reduction effect of high-phosphorus iron ore further.
In another aspect of the invention, the present invention proposes a kind of method processing high-phosphorus iron ore.Enforcement according to the present invention
Example, the method is to use the above-mentioned system processing high-phosphorus iron ore to carry out.According to a particular embodiment of the invention, the method
Including:
(1) high-phosphorus iron ore supply is carried out break process to described high-phosphorus iron ore breaker, in order to obtain high-phosphorus iron ore and break
Particle；
(2) reducing agent supply is carried out break process to described reducing agent breaker, in order to obtain reducing agent broken material；
(3) described high-phosphorus iron ore broken material is laid on the described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, by described
Reducing agent broken material is laid on the described reducing agent stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, in order to use reducing gases to described reduction
Agent carries out reduction treatment, and after gas after being reduced, and described reduction, gas carries out reduction treatment to described high-phosphorus iron ore broken material,
Obtain solid reduction product and tail gas；
(4) supply of described solid reduction product is carried out Water Quenching to described granulating unit, in order to reduce after obtaining shrend
Product；
(5) reduzate supply after described shrend is carried out mill ore magnetic selection process to described mill ore magnetic selection device, in order to obtain
Iron powder and mine tailing.
Thus, the method processing high-phosphorus iron ore according to embodiments of the present invention is provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reduction by employing
The gasification revolving bed of agent stone or metal plate for standing a stove on as a precaution against fire, and high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and reducing agent not
Directly contact so that the reducing agent arranged on reducing agent stone or metal plate for standing a stove on as a precaution against fire generating gasification reaction under the effect of reducing gases obtains containing an oxygen
Changing gas after the reduction of carbon and hydrogen, after this reduction, gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction instead
Should, such that it is able to significantly improve reduction effect, more existing employing reducing agent mixes the side carrying out reducing with high-phosphorus iron ore simultaneously
Formula is compared, and the reducing agent in the application is not directly contacted with high-phosphorus iron ore, so that the impurity in reducing agent i.e. harmful element
As S, P etc. will not enter in the material after reduction, and then i.e. can get low-phosphorous high-grade through follow-up shrend and mill ore magnetic selection
Iron powder.
It addition, the system of process high-phosphorus iron ore according to the above embodiment of the present invention can also have a following additional technical characteristic:
In some embodiments of the invention, in step (1), described high-phosphorus iron ore broken material particle diameter is not higher than 15mm.
Thus, it is possible to significantly improve the reduction effect of high-phosphorus iron ore.
In some embodiments of the invention, in step (2), the particle diameter of described reducing agent broken material is not higher than 30mm.
Thus, it is possible to significantly improve the gasification result of reducing agent broken material.
In some embodiments of the invention, the moisture in described reducing agent broken material and high-phosphorus iron ore broken material is the most solely
On the spot it is not higher than 1wt%.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
In some embodiments of the invention, in step (3), it is laid on the high-phosphorus iron ore material on described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire
Layer thickness is 25～40mm.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
In some embodiments of the invention, the reducing agent thickness of feed layer being laid on described reducing agent stone or metal plate for standing a stove on as a precaution against fire is 50～120mm.
Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
In some embodiments of the invention, described reducing agent is at least one in mill coal and semi-coke.Thus, may be used
To improve the reduction effect of high-phosphorus iron ore further.
In some embodiments of the invention, in described reducing agent, fixed carbon content is not less than 50%.Thus, it is possible to further
Improve the reduction effect of high-phosphorus iron ore.
In some embodiments of the invention, in described reducing gases, the volume fraction of oxygen and water is separately not higher than 10%.
Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
In some embodiments of the invention, described reducing gases be in blast furnace gas, coal gas of converter and electric furnace coal gas extremely
Few one.
In some embodiments of the invention, in step (3), after described reduction, described high-phosphorus iron ore broken material is carried out by gas
Reduction treatment is to carry out under temperature is 1000～1300 degrees Celsius 20～50 minutes.Thus, it is possible to improve high ferrophosphorus further
The reduction effect in ore deposit.
In some embodiments of the invention, in step (5), during described mill ore magnetic selection processes, magnetic separation strength is
800～1500Oe.Thus, it is possible to significantly improve the grade of iron powder.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become bright from the following description
Aobvious, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will be apparent from from combining the accompanying drawings below description to embodiment
With easy to understand, wherein:
Fig. 1 is the system structure schematic diagram processing high-phosphorus iron ore according to an embodiment of the invention；
Fig. 2 is the front view according to the gasification revolving bed in the system processing high-phosphorus iron ore of further embodiment of the present invention；
Fig. 3 is according to the high-phosphorus iron ore in the gasification revolving bed in the system processing high-phosphorus iron ore of another embodiment of the present invention
The top view of stone or metal plate for standing a stove on as a precaution against fire；
Fig. 4 is according to the reducing agent stove in the gasification revolving bed in the system processing high-phosphorus iron ore of another embodiment of the present invention
The top view of dish；
Fig. 5 is the method flow schematic diagram processing high-phosphorus iron ore according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ",
Orientation or the position relationship of the instruction such as " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferential " are based on shown in the drawings
Orientation or position relationship, be for only for ease of describe the present invention and simplify describe rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or
Person implies the quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two,
Three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", the art such as " fixing "
Language should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be machinery
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two units
Connection within part or the interaction relationship of two elements, unless otherwise clear and definite restriction.Ordinary skill for this area
For personnel, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be
One directly contacts with second feature, or the first and second features are by intermediary mediate contact.And, fisrt feature is
Two features " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of first
Characteristic level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature
Immediately below second feature or obliquely downward, or it is merely representative of fisrt feature level height less than second feature.
In one aspect of the invention, the present invention proposes a kind of system processing high-phosphorus iron ore.Reality according to the present invention
Executing example, with reference to Fig. 1, this system includes: high-phosphorus iron ore breaker 100, reducing agent breaker 200, gasification rotate
Bed 300, granulating unit 400 and mill ore magnetic selection device 500.
According to embodiments of the invention, high-phosphorus iron ore breaker 100 has high-phosphorus iron ore entrance 101 and high-phosphorus iron ore crushes
Material outlet 102, and be suitable to high-phosphorus iron ore is carried out break process, such that it is able to obtain high-phosphorus iron ore broken material.Thus, may be used
With significantly improve during sequential reduction with reduction after the contact area of gas, thus improve the reduction effect of high-phosphorus iron ore.
According to one embodiment of present invention, the particle diameter of high-phosphorus iron ore broken material is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, high-phosphorus iron ore broken material particle diameter can be not higher than
15mm, and the particle diameter of this high-phosphorus iron ore broken material should be greater than the diameter of the first through hole on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire.Thus, may be used
To improve the reduction effect of high-phosphorus iron ore further.
According to still a further embodiment, the water content in high-phosphorus iron ore broken material is not particularly restricted, this area skill
Art personnel can select according to actual needs, according to a particular embodiment of the invention, and the moisture in high-phosphorus iron ore broken material
Content can be not higher than 1wt%.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
According to embodiments of the invention, reducing agent breaker 200 has reducing agent entrance 201 and the outlet of reducing agent broken material
202, and be suitable to reducing agent is carried out break process, such that it is able to obtain reducing agent broken material.Thus, it is possible to significantly improve it
With the contact area of reducing gases, thus improve the gasification efficiency of reducing agent.
According to one embodiment of present invention, the particle diameter of reducing agent broken material is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, the particle diameter of reducing agent broken material can be not higher than
30mm, and the particle diameter of this reducing agent broken material should be greater than the diameter of the second through hole on reducing agent stone or metal plate for standing a stove on as a precaution against fire.Thus, it is possible to it is aobvious
Write the gasification efficiency improving reducing agent, and then improve the reduction effect of high-phosphorus iron ore further.
According to still a further embodiment, the water content in reducing agent broken material is not particularly restricted, art technology
Personnel can select according to actual needs, according to a particular embodiment of the invention, and the moisture in reducing agent broken material
1wt% can be not higher than.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
According to still another embodiment of the invention, the particular type of reducing agent is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, reducing agent can be in mill coal and semi-coke
At least one.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
According to still another embodiment of the invention, in reducing agent, fixed carbon content is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, in reducing agent, fixed carbon content can be not less than
50%.Thus, it is possible to significantly improve the gasification efficiency of reducing agent, and then improve the reduction effect of high-phosphorus iron ore further.
According to embodiments of the invention, with reference to Fig. 1 and 2, gasification revolving bed 300 includes high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31, reducing agent
Stone or metal plate for standing a stove on as a precaution against fire 32, radiation heating tube 33, high-phosphorus iron ore broken material entrance 301, reducing agent broken material entrance 302, reducing gases entrance
303, slag outlet 306 after offgas outlet 304, reduzate outlet 305 and reduction, high-phosphorus iron ore broken material entrance 301 with
High-phosphorus iron ore broken material outlet 102 is connected, and reducing agent broken material entrance 302 is connected with reducing agent broken material outlet 202, and
Be suitable to be laid on by high-phosphorus iron ore broken material on the high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, reducing agent broken material is laid on gas
Change on the reducing agent stone or metal plate for standing a stove on as a precaution against fire in revolving bed, in order to use reducing gases that reducing agent is carried out reduction treatment, gas after being reduced, and
And after reduction, gas carries out reduction treatment to high-phosphorus iron ore broken material, obtains solid reduction product and tail gas.
According to one embodiment of present invention, with reference to Fig. 3, high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31 is spindle rotationally arranged in gasification revolving bed 300
Inside, and along the rotation direction of high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31, high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31 is disposed with high-phosphorus iron ore
Feed zone 311, high-phosphorus iron ore reducing zone 312 and solid reduction product discharge zone 313, and high-phosphorus iron ore broken material entrance
301 are arranged on the gasification revolving bed sidewall of high-phosphorus iron ore feed zone 311, and solid reduction product outlet 305 is arranged on solid
On the gasification revolving bed sidewall of reduzate discharge zone 313, and on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31, it is provided with the first through hole 34,
So that gas is through the first through hole and high-phosphorus iron ore after the reduction containing carbon monoxide and hydrogen obtained after being gasified by reducing agent
There is reduction reaction in the high-phosphorus iron ore broken material contact on stone or metal plate for standing a stove on as a precaution against fire.
A specific embodiment according to the present invention, the high-phosphorus iron ore thickness of feed layer being laid on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is not by spy
Not limiting, those skilled in the art can select according to actual needs, according to the concrete example of the present invention, is laid on height
High-phosphorus iron ore thickness of feed layer on fosfosiderite stone or metal plate for standing a stove on as a precaution against fire can be 25～40mm.Inventor finds, if the blocked up meeting of the high-phosphorus iron ore bed of material
Have a strong impact on its breathability, thus the contact area of gas after reducing high-phosphorus iron ore and reduction, and then reduce the reduction of high-phosphorus iron ore
Effect.
According to still a further embodiment, with reference to Fig. 4, reducing agent stone or metal plate for standing a stove on as a precaution against fire 32 is spindle rotationally arranged in gasification revolving bed 300
Inside and be positioned at the lower section of high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31, and along the rotation direction of reducing agent stone or metal plate for standing a stove on as a precaution against fire 32, reducing agent stone or metal plate for standing a stove on as a precaution against fire
It is disposed with slag discharge zone 323 after reducing agent feed zone 321, reducing agent reducing zone 322 and reduction on 32, and reduces
Agent broken material entrance 302 is arranged on the gasification revolving bed sidewall of reducing agent feed zone 321, slag outlet 306 setting after reduction
Arrange on the gasification revolving bed sidewall of slag discharge zone 323 after reduction, and it is logical to be provided with second on reducing agent stone or metal plate for standing a stove on as a precaution against fire 32
Hole 35, so that the reducing agent broken material that reducing gases is on the second through hole with reducing agent stone or metal plate for standing a stove on as a precaution against fire carries out basis, thus is contained
There is gas after the reduction of carbon monoxide and hydrogen.
A specific embodiment according to the present invention, the reducing agent thickness of feed layer being laid on reducing agent stone or metal plate for standing a stove on as a precaution against fire is limited the most especially
System, those skilled in the art can select according to actual needs, according to the concrete example of the present invention, is laid on reducing agent
Reducing agent thickness of feed layer on stone or metal plate for standing a stove on as a precaution against fire can be 50～120mm.Inventor finds, if the blocked up meeting of reducing agent thickness of feed layer is serious
Affect breathability, thus have a strong impact on the gasification efficiency of reducing agent, and then reduce the utilization rate of reducing agent.
According to another specific embodiment of the present invention, the diameter of the first through hole 34 and the second through hole 35 is not particularly restricted,
Those skilled in the art can select according to actual needs, according to a particular embodiment of the invention, and the first through hole and second
The diameter of through hole is separately 2～8mm.
According to another specific embodiment of the present invention, vertical between high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31 and reducing agent stone or metal plate for standing a stove on as a precaution against fire 32
Distance is not particularly restricted, and those skilled in the art can select according to actual needs, according to the tool of the present invention
Body embodiment, the vertical dimension between high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reducing agent stone or metal plate for standing a stove on as a precaution against fire can be 300～1000mm.
Inventor finds, by being respectively provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reducing agent stone or metal plate for standing a stove on as a precaution against fire, and high ferrophosphorus in gasification revolving bed
Ore deposit stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and is not directly contacted with reducing agent so that arrange on reducing agent stone or metal plate for standing a stove on as a precaution against fire
The reducing agent reduction that generating gasification reaction obtains containing carbon monoxide and hydrogen under the effect of reducing gases after gas, after this reduction
Gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction reaction, such that it is able to significantly improve reduction effect,
Compared with more existing employing reducing agent mixes, with high-phosphorus iron ore, the mode carrying out reducing simultaneously, the reducing agent in the application and high phosphorus
Iron mine is not directly contacted with, so that the impurity in reducing agent i.e. harmful element such as S, P etc. will not enter into the material after reduction
In, and then i.e. can get low-phosphorous high-grade iron powder through subsequent processes.
According to still another embodiment of the invention, radiation heating tube 33 can be multiple, and multiple radiation heating tube 33
Being arranged on the inwall of gasification revolving bed 300, those skilled in the art can layout to radiation heating tube according to actual needs
Mode selects, as long as homogeneous temperature in gasification revolving bed can be kept.
According to still another embodiment of the invention, reducing gases entrance 303 is arranged on the bottom of gasification revolving bed 300 and is positioned at
The lower section of reducing agent stone or metal plate for standing a stove on as a precaution against fire 32, and be suitable to supply reducing gases in gasification revolving bed, in order to reducing agent is carried out gasification process,
Such that it is able to obtain gas after the reduction containing carbon monoxide and hydrogen.
A specific embodiment according to the present invention, in reducing gases, the content of oxygen and water is not particularly restricted, this area skill
Art personnel can select according to actual needs, and such as, in reducing gases, the volume fraction of oxygen and water can be separately
Not higher than 10%.Thus, it is possible to significantly improve the gasification efficiency of reducing agent, thus improve the reduction effect of high-phosphorus iron ore further
Really.
According to another specific embodiment of the present invention, the particular type of reducing gases is not particularly restricted, people in the art
Member can select according to actual needs, and such as, reducing gases can be selected from blast furnace gas, coal gas of converter and electric furnace coal gas
In at least one.
According to still another embodiment of the invention, offgas outlet arranges 304 and at the gasification top of revolving bed 300 and is positioned at high phosphorus
The top of iron mine stone or metal plate for standing a stove on as a precaution against fire 31, and the tail gas produced during being suitable to discharge high ferrophosphorus iron ore reduction.
According to still another embodiment of the invention, after reduction, gas carries out reduction treatment to high-phosphorus iron ore broken material can be in temperature
It is to carry out under 1000～1300 degrees Celsius 20～50 minutes.Thus, it is possible to significantly improve the reduction effect of high-phosphorus iron ore.Need
Illustrating, the time that high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire rotates a circle is the recovery time.
It should be noted that high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire 31 is identical with the direction of rotation of reducing agent stone or metal plate for standing a stove on as a precaution against fire 32, and reducing agent stone or metal plate for standing a stove on as a precaution against fire 32
The rotating speed of rotating speed high-phosphorus iron ore to be less than stone or metal plate for standing a stove on as a precaution against fire 31.Thus, it is possible to ensure that reducing agent fully gasifies, thus improve reducing agent
Utilization rate.
According to still another embodiment of the invention, after granulating unit 400 has solid reduction product entrance 401 and shrend also
Former product exit 402, solid reduction product entrance 401 is connected with solid reduction product outlet 305, and is suitable to revolve gasification
The solid reduction product obtained in rotated bed carries out Water Quenching, such that it is able to reduzate after obtaining shrend.
According to still another embodiment of the invention, reduzate entrance 501, iron powder after mill ore magnetic selection device 500 has shrend
Outlet 502 and mine tailing outlet 503, after shrend, reduzate entrance 501 is connected with reduzate outlet 402 after shrend, and
Be suitable to reduzate after above-mentioned obtained shrend is carried out mill ore magnetic selection process, such that it is able to obtain iron powder and mine tailing.
According to a particular embodiment of the invention, during mill ore magnetic selection processes, magnetic separation strength is not particularly restricted, people in the art
Member can select according to actual needs, and according to the concrete example of the present invention, during mill ore magnetic selection processes, magnetic separation strength can be
800～1500Oe.Thus, it is possible to significantly improve the separation efficiency of iron powder and mine tailing, thus improve the grade of gained iron powder.
The system processing high-phosphorus iron ore according to embodiments of the present invention is by being respectively provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed
With reducing agent stone or metal plate for standing a stove on as a precaution against fire, and high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and the most directly connects with reducing agent
Touch so that the reducing agent arranged on reducing agent stone or metal plate for standing a stove on as a precaution against fire generating gasification reaction under the effect of reducing gases obtain containing carbon monoxide and
Gas after the reduction of hydrogen, after this reduction, gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction reaction, from
And reduction effect can be significantly improved, simultaneously more existing employing reducing agent carries out compared with the mode reduced with high-phosphorus iron ore mixing,
Reducing agent in the application is not directly contacted with high-phosphorus iron ore, so that the impurity in reducing agent i.e. harmful element such as S, P etc.
Will not enter in the material after reduction, and then i.e. can get low-phosphorous high-grade iron powder through follow-up shrend and mill ore magnetic selection.
In another aspect of the invention, the present invention proposes a kind of method processing high-phosphorus iron ore.Enforcement according to the present invention
Example, the method is to use the above-mentioned system processing high-phosphorus iron ore to carry out.According to a particular embodiment of the invention, the method
Including: high-phosphorus iron ore supply is carried out break process to described high-phosphorus iron ore breaker by (1), in order to obtain high-phosphorus iron ore
Broken material；(2) reducing agent supply is carried out break process to described reducing agent breaker, in order to obtain reducing agent and crush
Material；(3) described high-phosphorus iron ore broken material is laid on the described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, by described
Reducing agent broken material is laid on the described reducing agent stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, in order to use reducing gases to described reduction
Agent carries out reduction treatment, and after gas after being reduced, and described reduction, gas carries out reduction treatment to described high-phosphorus iron ore broken material,
Obtain solid reduction product and tail gas；(4) supply of described solid reduction product is carried out Water Quenching to described granulating unit,
So as reduzate after obtaining shrend；(5) reduzate supply after described shrend is ground to described mill ore magnetic selection device
Ore deposit magnetic separation processes, in order to obtain iron powder and mine tailing.Inventor finds, employing is provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reducing agent
The gasification revolving bed of stone or metal plate for standing a stove on as a precaution against fire, and high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire to be positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore the most straight with reducing agent
Contact so that the reducing agent arranged on reducing agent stone or metal plate for standing a stove on as a precaution against fire generating gasification reaction under the effect of reducing gases obtains containing an oxidation
Gas after the reduction of carbon and hydrogen, after this reduction, gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction reaction,
Such that it is able to significantly improve reduction effect, more existing employing reducing agent mixes the mode phase carrying out reducing with high-phosphorus iron ore simultaneously
Ratio, the reducing agent in the application is not directly contacted with high-phosphorus iron ore, so that the impurity in reducing agent i.e. harmful element such as S,
P etc. will not enter in the material after reduction, and then i.e. can get low-phosphorous high-grade iron powder through follow-up shrend and mill ore magnetic selection.
It is equally applicable to this process high phosphorus for the feature and advantage described by the system of process high-phosphorus iron ore it should be noted that above-mentioned
The method of iron mine, here is omitted.
The method that the embodiment of the present invention processes high-phosphorus iron ore below with reference to Fig. 5 is described in detail.Reality according to the present invention
Executing example, the method includes:
S100: high-phosphorus iron ore supply is carried out break process to high-phosphorus iron ore breaker
According to embodiments of the invention, high-phosphorus iron ore supply is carried out break process to high-phosphorus iron ore breaker, thus can
To obtain high-phosphorus iron ore broken material.Thus, it is possible to during significantly improving sequential reduction with reduction after the contact area of gas, from
And improve the reduction effect of high-phosphorus iron ore.
According to one embodiment of present invention, the particle diameter of high-phosphorus iron ore broken material is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, high-phosphorus iron ore broken material particle diameter can be not higher than
15mm, and the particle diameter of this high-phosphorus iron ore broken material should be greater than the diameter of the first through hole on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire.Thus, may be used
To improve the reduction effect of high-phosphorus iron ore further.
According to still a further embodiment, the water content in high-phosphorus iron ore broken material is not particularly restricted, this area skill
Art personnel can select according to actual needs, according to a particular embodiment of the invention, and the moisture in high-phosphorus iron ore broken material
Content can be not higher than 1wt%.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
S200: reducing agent supply is carried out break process to reducing agent breaker
According to embodiments of the invention, reducing agent supply is carried out break process to reducing agent breaker, such that it is able to
To reducing agent broken material.Thus, it is possible to significantly improve the contact area of itself and reducing gases, thus improve the gasification effect of reducing agent
Rate.
According to one embodiment of present invention, the particle diameter of reducing agent broken material is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, the particle diameter of reducing agent broken material can be not higher than
30mm, and the particle diameter of this reducing agent broken material should be greater than the diameter of the second through hole on reducing agent stone or metal plate for standing a stove on as a precaution against fire.Thus, it is possible to it is aobvious
Write the gasification efficiency improving reducing agent, and then improve the reduction effect of high-phosphorus iron ore further.
According to still a further embodiment, the water content in reducing agent broken material is not particularly restricted, art technology
Personnel can select according to actual needs, according to a particular embodiment of the invention, and the moisture in reducing agent broken material
1wt% can be not higher than.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
According to still another embodiment of the invention, the particular type of reducing agent is not particularly restricted, and those skilled in the art can
To select according to actual needs, according to a particular embodiment of the invention, reducing agent can be in mill coal and semi-coke
At least one.Thus, it is possible to improve the reduction effect of high-phosphorus iron ore further.
According to still another embodiment of the invention, in reducing agent, fixed carbon content is not particularly restricted, those skilled in the art
Can select according to actual needs, according to a particular embodiment of the invention, in reducing agent, fixed carbon content can be not less than
50%.Thus, it is possible to significantly improve the gasification efficiency of reducing agent, and then improve the reduction effect of high-phosphorus iron ore further.
S300: high-phosphorus iron ore broken material is laid on the described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, reducing agent is crushed
Material is laid on the reducing agent stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed
According to embodiments of the invention, high-phosphorus iron ore broken material is laid on the described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed,
Reducing agent broken material is laid on the reducing agent stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, in order to use reducing gases that reducing agent is reduced
Processing, after obtaining gas after the reduction containing carbon monoxide and hydrogen, and reduction, gas carries out also original place to high-phosphorus iron ore broken material
Reason, obtains solid reduction product and tail gas.
A specific embodiment according to the present invention, the high-phosphorus iron ore thickness of feed layer being laid on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is not by spy
Not limiting, those skilled in the art can select according to actual needs, according to the concrete example of the present invention, is laid on height
High-phosphorus iron ore thickness of feed layer on fosfosiderite stone or metal plate for standing a stove on as a precaution against fire can be 25～40mm.Inventor finds, if the blocked up meeting of the high-phosphorus iron ore bed of material
Have a strong impact on its breathability, thus the contact area of gas after reducing high-phosphorus iron ore and reduction, and then reduce the reduction of high-phosphorus iron ore
Effect.
According to another specific embodiment of the present invention, the reducing agent thickness of feed layer being laid on reducing agent stone or metal plate for standing a stove on as a precaution against fire is not by especially
Limiting, those skilled in the art can select according to actual needs, according to the concrete example of the present invention, is laid on reduction
Reducing agent thickness of feed layer on agent stone or metal plate for standing a stove on as a precaution against fire can be 50～120mm.Inventor finds, if the blocked up meeting of reducing agent thickness of feed layer is tight
Ghost image rings breathability, thus has a strong impact on the gasification efficiency of reducing agent, and then reduces the utilization rate of reducing agent.
Inventor finds, by being respectively provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reducing agent stone or metal plate for standing a stove on as a precaution against fire, and high ferrophosphorus in gasification revolving bed
Ore deposit stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and is not directly contacted with reducing agent so that arrange on reducing agent stone or metal plate for standing a stove on as a precaution against fire
The reducing agent reduction that generating gasification reaction obtains containing carbon monoxide and hydrogen under the effect of reducing gases after gas, after this reduction
Gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction reaction, such that it is able to significantly improve reduction effect,
Compared with more existing employing reducing agent mixes, with high-phosphorus iron ore, the mode carrying out reducing simultaneously, the reducing agent in the application and high phosphorus
Iron mine is not directly contacted with, so that the impurity in reducing agent i.e. harmful element such as S, P etc. will not enter into the material after reduction
In, and then i.e. can get low-phosphorous high-grade iron powder through subsequent processes.
According to another specific embodiment of the present invention, in reducing gases, the content of oxygen and water is not particularly restricted, this area
Technical staff can select according to actual needs, and such as, in reducing gases, the volume fraction of oxygen and water can be independently
Ground not higher than 10%.Thus, it is possible to significantly improve the gasification efficiency of reducing agent, thus improve the reduction of high-phosphorus iron ore further
Effect.
According to another specific embodiment of the present invention, the particular type of reducing gases is not particularly restricted, people in the art
Member can select according to actual needs, and such as, reducing gases can be selected from blast furnace gas, coal gas of converter and electric furnace coal gas
In at least one.
According to still another embodiment of the invention, after reduction, gas carries out reduction treatment to high-phosphorus iron ore broken material can be in temperature
It is to carry out under 1000～1300 degrees Celsius 20～50 minutes.Thus, it is possible to significantly improve the reduction effect of high-phosphorus iron ore.Need
Illustrating, the time that high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire rotates a circle is the recovery time.
S400: solid reduction product supply is carried out Water Quenching to granulating unit
According to embodiments of the invention, solid reduction product obtained above supply is carried out Water Quenching to granulating unit,
Such that it is able to reduzate after obtaining shrend.
S500: reduzate supply after shrend is carried out mill ore magnetic selection process to mill ore magnetic selection device
According to embodiments of the invention, reduzate supply after shrend obtained above is carried out ore grinding to mill ore magnetic selection device
Magnetic separation processes, such that it is able to obtain iron powder and mine tailing.According to a particular embodiment of the invention, during mill ore magnetic selection processes, magnetic separation is strong
Degree is not particularly restricted, and those skilled in the art can select according to actual needs, according to the concrete example of the present invention,
During mill ore magnetic selection processes, magnetic separation strength can be 800～1500Oe.Thus, it is possible to significantly improve the separation efficiency of iron powder and mine tailing,
Thus improve the grade of gained iron powder.
The method processing high-phosphorus iron ore according to embodiments of the present invention is provided with high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and reducing agent stone or metal plate for standing a stove on as a precaution against fire by employing
Gasification revolving bed, and high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is positioned at the top of reducing agent stone or metal plate for standing a stove on as a precaution against fire, i.e. high-phosphorus iron ore and the most directly connects with reducing agent
Touch so that the reducing agent arranged on reducing agent stone or metal plate for standing a stove on as a precaution against fire generating gasification reaction under the effect of reducing gases obtain containing carbon monoxide and
Gas after the reduction of hydrogen, after this reduction, gas contacts with the high-phosphorus iron ore broken material on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and carries out reduction reaction, from
And reduction effect can be significantly improved, simultaneously more existing employing reducing agent carries out compared with the mode reduced with high-phosphorus iron ore mixing,
Reducing agent in the application is not directly contacted with high-phosphorus iron ore, so that the impurity in reducing agent i.e. harmful element such as S, P etc.
Will not enter in the material after reduction, and then i.e. can get low-phosphorous high-grade iron powder through follow-up shrend and mill ore magnetic selection.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are the most descriptive
, and limit the present invention never in any form.
Embodiment 1
High-phosphorus iron ore composition (mass percent): Fe:46.32%, P:0.92%, obtains high phosphorus by broken for high-phosphorus iron ore drying
Iron mine broken material (particle diameter is 7mm), obtains mill coal broken material (particle diameter is 15mm), then by mill coal break process
Obtained high-phosphorus iron ore broken material is layed on the high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, mill coal broken material is laid
On reducing agent stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, wherein, high-phosphorus iron ore layer thickness is 30mm, and mill coal layer thickness is 85mm,
Being passed through electric furnace gas reduction 50min at 1200 DEG C, solid reduction product obtained after reduction carries out ore grinding magnetic after carrying out shrend
Choosing, the reduzate particle diameter after ore grinding is 0.043-0.075mm, magnetic separation strength 1200Oe, it is thus achieved that TFe 92.3%, P 0.09%
Iron powder.
Embodiment 2
High-phosphorus iron ore composition (mass percent): Fe:42.68%.P:0.76%, obtains high phosphorus by broken for high-phosphorus iron ore drying
Iron mine broken material (particle diameter is 6mm), obtains semi-coke broken material (particle diameter is 18mm), then by institute by semi-coke break process
The high-phosphorus iron ore broken material obtained is layed on the high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, and semi-coke broken material is layed in gasification
On reducing agent stone or metal plate for standing a stove on as a precaution against fire in revolving bed, wherein, high-phosphorus iron ore layer thickness is 25mm, and semi-coke layer thickness is 90mm, at 1250 DEG C
Being passed through coal gas of converter gas reduction 60min, solid reduction product obtained after reduction carries out mill ore magnetic selection after carrying out shrend,
Reduzate particle diameter after ore grinding is 0.043-0.075mm, magnetic separation strength 1000Oe, it is thus achieved that TFe 94.5%, P's 0.07%
Iron powder.
Embodiment 3
High-phosphorus iron ore composition (mass percent): Fe:48.53%.P:1.06%, obtains high phosphorus by broken for high-phosphorus iron ore drying
Iron mine broken material (particle diameter is 5mm), obtains mill coal broken material (particle diameter is 14mm), then by mill coal break process
Obtained high-phosphorus iron ore broken material is layed on the high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, mill coal broken material is laid
On reducing agent stone or metal plate for standing a stove on as a precaution against fire in gasification revolving bed, wherein, high-phosphorus iron ore layer thickness is 25mm, and mill coal layer thickness is 100mm,
Being passed through blast furnace gas reduction 55min at 1280 DEG C, solid reduction product obtained after reduction carries out ore grinding magnetic after carrying out shrend
Choosing, the reduzate particle diameter after ore grinding is 0.043-0.075mm, magnetic separation strength 1400Oe, it is thus achieved that TFe 91.9%, P 0.09%
Iron powder.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term necessarily
It is directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be arbitrary
Individual or multiple embodiment or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined by art personnel
And combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (10)
1. process a system for high-phosphorus iron ore, be characterised by, including:
High-phosphorus iron ore breaker, described high-phosphorus iron ore breaker has high-phosphorus iron ore entrance and the outlet of high-phosphorus iron ore broken material；
Reducing agent breaker, described reducing agent breaker has reducing agent entrance and the outlet of reducing agent broken material；
Gasification revolving bed, described gasification revolving bed includes:
High-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire, described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is spindle rotationally arranged in inside described gasification revolving bed, and edge
The rotation direction of described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire, described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is disposed with high-phosphorus iron ore feed zone,
High-phosphorus iron ore reducing zone and solid reduction product discharge zone, on the gasification revolving bed sidewall of described high-phosphorus iron ore feed zone
Being provided with high-phosphorus iron ore broken material entrance, described high-phosphorus iron ore broken material entrance exports phase with described high-phosphorus iron ore broken material
Even, the gasification revolving bed sidewall of described solid reduction product discharge zone arranges solid reduction product outlet, described
The first through hole it is provided with on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire；
Reducing agent stone or metal plate for standing a stove on as a precaution against fire, described reducing agent stone or metal plate for standing a stove on as a precaution against fire is spindle rotationally arranged in described gasification revolving bed inside and is positioned at described height
The lower section of fosfosiderite stone or metal plate for standing a stove on as a precaution against fire, and along the rotation direction of described reducing agent stone or metal plate for standing a stove on as a precaution against fire, described reducing agent stone or metal plate for standing a stove on as a precaution against fire sets successively
Being equipped with slag discharge zone after reducing agent feed zone, reducing agent reducing zone and reduction, the gasification at described reducing agent feed zone is revolved
Being provided with reducing agent broken material entrance on rotated bed sidewall, described reducing agent broken material entrance goes out with described reducing agent broken material
Mouth is connected, and arranges slag outlet after reduction, described reduction after described reduction on the gasification revolving bed sidewall of slag discharge zone
The second through hole it is provided with on agent stone or metal plate for standing a stove on as a precaution against fire；
Multiple radiation heating tubes, the plurality of radiation heating tube is arranged on the inwall of described gasification revolving bed；
Reducing gases entrance, described reducing gases entrance is arranged on the bottom of described gasification revolving bed and is positioned at described reducing agent stove
The lower section of dish；
Offgas outlet, described offgas outlet is arranged on the top of described gasification revolving bed and is positioned at described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire
Top；
Granulating unit, described granulating unit has reduzate outlet after solid reduction product entrance and shrend, and described solid is also
Former product inlet is connected with the outlet of described solid reduction product；
Mill ore magnetic selection device, described mill ore magnetic selection device has reduzate entrance after shrend, iron powder outlet and mine tailing outlet,
After described shrend, reduzate entrance is connected with reduzate outlet after described shrend.
System the most according to claim 1, it is characterised in that described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire and described reducing agent stone or metal plate for standing a stove on as a precaution against fire
Between vertical dimension be 300～1000mm.
System the most according to claim 1 and 2, it is characterised in that the diameter of described first through hole and the second through hole divides
Not independently be 2～8mm.
4. the system that a kind utilizes according to any one of claim 1-3 processes the method for high-phosphorus iron ore, it is characterised in that bag
Include:
(1) high-phosphorus iron ore supply is carried out break process to described high-phosphorus iron ore breaker, in order to obtain high-phosphorus iron ore and break
Particle；
(2) reducing agent supply is carried out break process to described reducing agent breaker, in order to obtain reducing agent broken material；
(3) described high-phosphorus iron ore broken material is laid on the described high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, by described
Reducing agent broken material is laid on the described reducing agent stone or metal plate for standing a stove on as a precaution against fire in described gasification revolving bed, in order to use reducing gases to described reduction
Agent carries out reduction treatment, and after gas after being reduced, and described reduction, gas carries out reduction treatment to described high-phosphorus iron ore broken material,
Obtain solid reduction product and tail gas；
(4) supply of described solid reduction product is carried out Water Quenching to described granulating unit, in order to reduce after obtaining shrend
Product；
(5) reduzate supply after described shrend is carried out mill ore magnetic selection process to described mill ore magnetic selection device, in order to obtain
Iron powder and mine tailing.
Method the most according to claim 4, it is characterised in that in step (1), described high-phosphorus iron ore broken material
Particle diameter is not higher than 15mm.
6., according to the method described in claim 4 or 5, it is characterised in that in step (2), described reducing agent crushes
The particle diameter of material is not higher than 30mm.
7. according to the method according to any one of claim 4-6, it is characterised in that described reducing agent broken material and high ferrophosphorus
Moisture in the broken material of ore deposit is separately not higher than 1wt%.
8. according to the method according to any one of claim 4-7, it is characterised in that in step (3), be laid on institute
Stating the high-phosphorus iron ore thickness of feed layer on high-phosphorus iron ore stone or metal plate for standing a stove on as a precaution against fire is 25～40mm；
Optional, the reducing agent thickness of feed layer being laid on described reducing agent stone or metal plate for standing a stove on as a precaution against fire is 50～120mm；
Optional, described reducing agent is at least one in mill coal and semi-coke；
Optional, in described reducing agent, fixed carbon content is not less than 50%；
Optional, in described reducing gases, the volume fraction of oxygen and water is separately not higher than 10%；
Optional, described reducing gases is at least one in blast furnace gas, coal gas of converter and electric furnace coal gas.
9. according to the method according to any one of claim 4-8, it is characterised in that in step (3), described reduction
It is to carry out under temperature is 1000～1300 degrees Celsius 20～50 minutes that rear gas carries out reduction treatment to described high-phosphorus iron ore broken material.
10. according to the method according to any one of claim 4-9, it is characterised in that in step (5), described ore grinding
During magnetic separation processes, magnetic separation strength is 800～1500Oe.
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| CN1211624A (en) * | 1997-06-16 | 1999-03-24 | 普拉塞尔技术有限公司 | Production of direct reduced iron with reduced fuel consumption and emission of carbon monoxide |
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