CN106498155A - A kind of processing method of roe shape high-phosphorus hematite and its dedicated system - Google Patents
A kind of processing method of roe shape high-phosphorus hematite and its dedicated system Download PDFInfo
- Publication number
- CN106498155A CN106498155A CN201610986380.XA CN201610986380A CN106498155A CN 106498155 A CN106498155 A CN 106498155A CN 201610986380 A CN201610986380 A CN 201610986380A CN 106498155 A CN106498155 A CN 106498155A
- Authority
- CN
- China
- Prior art keywords
- pelletizing
- blending amount
- coal
- coal blending
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a kind of processing method of roe shape high-phosphorus hematite and its dedicated system.Methods described includes：(1) roe shape high-phosphorus hematite, reduction coal and carbide slag are mixed to get compound pelletizing, respectively obtain low coal blending amount pelletizing and high coal blending amount pelletizing；(2) reduction roasting process is carried out after drying low coal blending amount pelletizing and high coal blending amount pelletizing, obtain metallized pellet；(3) metallized pellet water quenching, once mill choosing obtain metal iron powder and a tailings；(4) metal iron powder is carried out secondary grinding choosing process and obtains Iron concentrate and secondary tailings.The present invention further discloses realizing the dedicated system of the processing method.The present invention not only effectively make use of carbide slag solid waste but also reach preferable dephosphorization effect, and in Iron concentrate, up to 92%, phosphorus removal efficiency solves roe shape high-phosphorus hematite dephosphorization difficulty, the low problem of disposal ability more than 90% to iron recovery.
Description
Technical field
The present invention relates to a kind of processing method of roe shape high-phosphorus hematite, the invention further relates to realizing the processing method
Dedicated system, belong to the field of comprehensive utilization of roe shape high-phosphorus hematite.
Background technology
Being mainly characterized by for China iron deposit stone is lean, thin and miscellaneous, and average Iron grade is 32%, and the iron ore of wherein most is needed
Carry out ore dressing process.There are 3,000,000,000 tons of roe shape high-phosphorus hematites, this iron ore height containing P (0.4-1.0%), grade in China
Between 35%-50%, ferrum oxide crystal grain disseminated grain size thin (1-3 μm), it is extremely difficult to sort separation, thus is effectively opened
Adopt utilization.
Roe shape high-phosphorus hematite has oolitic texture, and it is embedding that bloodstone is in flakey, threadiness mixes numerous shape with gangue mineral
Cloth, the phosphorus preservation in Ore are in collophane and mixed in together with the chamosite rich in ferrum oxide, form concentric layered shell polysaccharide phase
Between oolith structure；If not changing the occurrence status of ferrum, ferrum just selected cannot be enriched with, and phosphorus also effectively cannot be rejected.Due to its ore deposit
Thing construction featuress, the ore dressing difficulty of oolitic hematite are very big, and dephosphorization is difficult, and disposal ability is low.The country is to oolitic hematite at present
Carry out the ore dressings such as substantial amounts of one reverse flotation of strong magnetic, one gravity treatment of strong magnetic, flotation, reverse flotation and high-gradient magnetic separation to test, but all
It is difficult to obtain preferable sorting index.
Chinese Patent Application No. provides phosphorus unit in a kind of high-phosphorus hematite for the patent of invention of CN201010033784.X
Element and the method for ferrum element physics dissociation, specifically include following steps：By high-phosphorus hematite corase grind, screening, after drying using height
Fast airflow milling technology carries out Ultrafine Grinding, and it is 2 μm super that the high-phosphorus hematite of 80～200 mesh of normal granulometry is finely ground to particle mean size
Fine granularity, the high-phosphorus hematite particle size distribution range after fine grinding is 102nm～104nm, makes P elements, ferrum element dissociation.This
Bright patent working raw material need to carry out Ultrafine Grinding, and condition requires strictly unsuitable large-scale production, and practical situation P elements, ferrum unit
Element separation is insufficient.
Chinese Patent Application No. provides a kind of roe shape high-phosphorus hematite for the patent of invention of CN200610124741.6
Beneficiation method, specifically includes following steps：By weight percentage composition by 80～99% broken after roe shape high-phosphorus hematite, 1
～20% reducing agent coal dust loads shaft furnace or rotary kiln carries out roasting, and sintering temperature is 700～1050 DEG C, and roasting time is
0.5～2.5h, sealing are cooled to room temperature.Roasted ore is carried out after crushing, grinding low intensity magnetic separation again.Then by the thick of magnetic separation acquisition
Concentrate adjusts pH value to 8～12, adds iron mine inhibitor 0.5～3.0kg/t of sulfonated starch, adds 0.2～2.0kg/ of activator
T, being eventually adding 0.2～3.0kg/t of collecting agent carries out reverse flotation.Major defect existing for the method is as follows：
1. the invention processes roe shape high-phosphorus hematite complex process, and treatment effeciency is low.
2. raw material roasting adopts rotary kiln, reduction temperature is low, heat loss is big and kiln in easy ring formation, the calcination process time compared with
Long, most long need 2.5 hours.
With the fast development of steel and iron industry, quickly, rich ore is fewer and feweri for iron ore deposit wear rate, it would be highly desirable to need to develop
A kind of method of efficient process roe shape high-phosphorus hematite, improves dephosphorization efficiency, increases disposal ability.
Content of the invention
The technical problem to be solved is to solve taking off existing for existing roe shape high-phosphorus hematite processing method
Phosphorus is difficult, the problems such as disposal ability is low, production cost is high, there is provided a kind of processing method of new roe shape high-phosphorus hematite, the party
Method adjusts raw material basicity, improves distributing mode in rotary hearth furnace by controlling reduction coal and carbide slag proportioning in raw material, effectively reduces
Production process energy consumption, improves utilization rate of equipment and installations, increases production capacity, reduces into product cost.
The technical problem to be solved is achieved through the following technical solutions：
A kind of processing method of roe shape high-phosphorus hematite, comprises the following steps：
(1) preparation of low coal blending amount pelletizing：Roe shape high-phosphorus hematite, reduction coal and carbide slag mix homogeneously are mixed
Material, by compound pelletizing, obtains low coal blending amount pelletizing；In obtained low coal blending amount pelletizing, roe shape high-phosphorus hematite and reduction
The mass ratio of coal is 100：(15-30), amount of allocating of the carbide slag in compound controls CaO/SiO in compound is made2Matter
Amount ratio is in 0.3-0.6.
The preparation of high coal blending amount pelletizing：Roe shape high-phosphorus hematite, reduction coal and carbide slag mix homogeneously are obtained compound,
By compound pelletizing, high coal blending amount pelletizing is obtained；In obtained high coal blending amount pelletizing, roe shape high-phosphorus hematite and reduction coal
Mass ratio is 100：(18-38), amount of allocating of the carbide slag in compound controls CaO/SiO in compound is made2Mass ratio
In 0.3-0.6.
Wherein, in high coal blending amount pelletizing, reduction coal is higher than in low coal blending amount pelletizing with the consumption proportion of roe shape high-phosphorus hematite
Reduction coal and the consumption proportion of roe shape high-phosphorus hematite；
(2) stepping into rotary hearth furnace after drying low coal blending amount pelletizing and high coal blending amount pelletizing carries out reduction roasting process, obtains
Metallized pellet；
(3) metallized pellet carries out water quenching, mill and obtains metal iron powder and tailings after selecting；
(4) metal iron powder is carried out secondary grinding choosing process and obtains Iron concentrate and secondary tailings.
In order to reach superior technique effect, preferably by roe shape high-phosphorus hematite, reduction coal and carbide slag point in step (1)
, Hong Gan not remix after levigate, screening, by compound pelletizing, respectively obtain low coal blending amount pelletizing or height
Coal blending amount pelletizing.
In the carbide slag, the content of calcium hydroxide is more than or equal to 50wt%.
Contained CaOH in carbide slag2After heated decomposition to CaO, CaO participates in the mechanism of reaction and is shown below：
Fe2SiO4(s)+2CaO(s)+2C(s)→2Fe(s)+Ca2SiO4(s)+2CO(g)
In material, CaO can displace the FeO of free state from part iron content complex oxide in roe shape high-phosphorus hematite,
Promote the decomposition of iron content complex oxide, improve the activity of iron oxides, the metallization journey of DRI is made under carbonaceous reducing agent or so
Degree is dramatically increased.Meanwhile, from the point of view of the compositing characteristic of Ore Minerals, addition CaO can be with the SiO of embedding cloth in oolith2Occur
Reaction, reaches acceleration oolith and cracks, promotes the purpose that oxides-containing iron fully reacts in C or CO and ore deposit.Carbide slag is in compound
In amount of allocating control in compound is made CaO/SiO2Mass ratio in 0.3-0.6.Above-mentioned effect is not had when basicity is relatively low
Really, it is impossible to efficient process roe shape high-phosphorus hematite, when basicity is too high as mineral physicses structure change causes product index ferrum
Grade and the response rate declined, so suitable alkalinity ranges should be controlled.
The present invention controls the dual alkalinity of dispensing in the range of 0.3-0.6 by allocating carbide slag into, fills beneficial to reduction reaction
Dividing is carried out, and improves the ferrum percent reduction of metallized pellet.Because CaO can be from raw material in part iron content complex oxide in carbide slag
The FeO of free state is displaced, promotes the decomposition of iron content complex oxide, improved the activity of iron oxides, make the metallization of DRI
Degree is dramatically increased.Meanwhile, from the point of view of the compositing characteristic of Ore Minerals, addition CaO can be with the SiO of embedding cloth in oolith2Send out
Raw reaction, reaches acceleration oolith and cracks, promotes the purpose that oxides-containing iron fully reacts in C or CO and ore deposit.But when basicity is too high
When cause the grade and the response rate of product index ferrum to decline due to mineral physicses structure change, suitable basicity model should be controlled
Enclose.
The reduction coal be any one of coking coal, brown coal or anthracite or more than one according to arbitrary proportion group
Into mixture.
In step (2) inside the rotary hearth furnace, along bottom and top on the revolving burner bottom direction away from the rotary hearth furnace
Layer is high coal blending amount pelletizing, and intermediate layer is that pelletizing is distributed in the material area of rotary hearth furnace and carries out by the distributing mode of low coal blending amount pelletizing
Reduction roasting.A low important limiting factor of rotary hearth furnace production production capacity is exactly that fabric thickness is low, when in stove, fabric thickness is higher
When substrate material reduction can be caused in stove insufficient, affect production target.The present invention by improving proportioning raw materials and distributing mode,
May be implemented in, thickness of feed layer can improve 3-5 times, corresponding raw
Produce production capacity and can improve 3-5 times, and then improve rotary hearth furnace production efficiency and production capacity.
It is high coal blending amount pelletizing that the present invention adopts deep bed sintering distributing mode, bottom and top layer, and intermediate layer is low coal blending amount ball
Group；As upper strata pelletizing carbon content is high in reducing roasting process, reduce causes upper strata pelletizing reduction insufficient because of carbon scaling loss,
Oxidation of coal can improve temperature of charge again simultaneously, shorten the response time；Bottom pelletizing carbon content is high, can improve bottom ball during oxidation of coal
Group's temperature and generation reducibility gas, effective control furnace reduction atmosphere prevent reducing metal from reoxidizing, realize polytrope in stove
Group is synchronous to reduce, and the reduction of metal pelletizing fully, is separated beneficial to follow-up valuable metal, and deep-bed sintering can effectively improve rotary hearth furnace
Production efficiency and production capacity.
The present invention is further dropped by selecting the metal iron powder obtained after the mill choosing of roasting-ore grinding-once again through secondary grinding
Phosphorus content in low iron powder, improves roe shape high-phosphorus hematite phosphorus removal efficiency.
Heretofore described reduction roasting condition is preferably：Reduction roasting temperature is 1100 DEG C～1300 DEG C, reduction roasting
The burning time is 20min～40min.
Invention further provides a kind of realize the above-mentioned dedicated system for stating any one processing method, the dedicated system
System and acidleach processing system is selected to constitute by raw material processing system, balling-up system, reduction roasting system, mill；Wherein, the raw material
There is processing system roe shape high phosphorus to go out the outlet of iron mine entrance, reduction coal entrance, carbide slag entrance and compound；The balling-up system
There is compound entrance and dry pelletizing outlet, the compound entrance is connected with the outlet of raw material processing system compound；Described
There is reduction roasting system pelletizing entrance and metallized pellet outlet, the pelletizing entrance to dry pelletizing with the balling-up system and go out
Mouth is connected；The once mill selects system that there is metallized pellet entrance, metal iron powder outlet and a tailings outlet；Described secondary
Mill select system have metal iron powder entrance, Iron concentrate outlet and secondary tailings outlet, the metal iron powder entrance with described once
Mill selects the outlet of system metal iron powder to be connected.
The inventive method adjusts raw material basicity, improves in rotary hearth furnace by controlling reduction coal and carbide slag proportioning in raw material
Distributing mode, effectively reduces production process energy consumption, improves utilization rate of equipment and installations, increases production capacity, reduces into product cost.The present invention is existing
The carbide slag solid waste that make use of of effect reaches preferable dephosphorization effect again, and in metal iron powder, up to 92.31%, dephosphorization rate is big for iron recovery
In 90%, roe shape high-phosphorus hematite dephosphorization difficulty is solved, the low problem of disposal ability realizes the efficient of roe shape high-phosphorus hematite
Utilize.
The main beneficial effect of technical solution of the present invention：
1. the dual alkalinity of dispensing is controlled by allocating carbide slag into, and roe shape high-phosphorus hematite is reduced by heating, ferrum is made
Ore deposit is reduced into metallic iron agglomeration, effectively can separate metal iron powder with phosphorous stone-like pulse, both after a fine grinding magnetic separation
Effectively make use of carbide slag solid waste to reach preferable dephosphorization effect again, metal iron powder is carried out secondary grinding choosing and effectively improves dephosphorization
Rate is more than 90%.
2. different mixed carbon comtent pelletizings and layer-by-layer distribution is adopted, realizes that multilamellar pelletizing is synchronously reduced in stove, makes metal pelletizing also
Former abundant, process through mill choosing twice and obtain Iron concentrate and tailings.
3. multilamellar cloth can improve fabric thickness in stove, can effectively improve utilization rate of equipment and installations, ensure that product index is qualified
On the premise of production capacity greatly improve, than traditional method production capacity improve 3-5 times.
Description of the drawings
The process chart of the processing method of the roe shape high-phosphorus hematite of Fig. 1 present invention.
Fig. 2 realizes the schematic diagram of the dedicated system figure of processing method of the present invention.
Specific embodiment
Further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
Apparent.But these embodiments are only exemplary, do not constitute any restriction to the scope of the present invention.People in the art
Member is it should be understood that can enter to the details of technical solution of the present invention and form without departing from the spirit and scope of the invention
Row modification is replaced, but these modifications and replacement are each fallen within protection scope of the present invention.
Embodiment 1
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: coking coal=
100: 15 mass ratio and allocate into carbide slag control compound dual alkalinity be 0.3, compound mix after make low coal blending
Amount pelletizing；According to roe shape high-phosphorus hematite: coking coal=100: 24 mass ratio, and allocate the binary that carbide slag controls compound into
Basicity is 0.3, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount pelletizing through dry
After dry, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing, and intermediate layer is matched somebody with somebody for low
Pelletizing is distributed in the material area of rotary hearth furnace by the distributing mode of coal amount pelletizing carries out reduction roasting, 1100 DEG C of reduction roasting temperature,
After 20 minutes time, process such that it is able to obtaining Iron concentrate and tailings reality respectively through mill choosing twice after gained metallized pellet water quenching
Existing ferrum, phosphorus are separated, and, up to 90%, wherein in Iron concentrate, iron recovery is up to 88.65% for dephosphorization rate.
Embodiment 2
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: brown coal=
100: 20 mass ratio mix and allocate into carbide slag control compound dual alkalinity be 0.4, compound mix after make low
Coal blending amount pelletizing；According to roe shape high-phosphorus hematite: go back brown coal=100: 27 mass ratio mixes and to allocate carbide slag control into mixed
The dual alkalinity for closing material is 0.4, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending
After drying, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing to amount pelletizing, in
Interbed is that pelletizing is distributed in the material area of rotary hearth furnace and carries out reduction roasting, reduction roasting temperature by the distributing mode of low coal blending amount pelletizing
1250 DEG C of degree, after 30 minutes time, is processed such that it is able to obtaining metal respectively through mill choosing twice after gained metallized pellet water quenching
With tailings, iron powder realizes that ferrum, phosphorus are separated, up to 92%, wherein in Iron concentrate, iron recovery is up to 91.52% for dephosphorization rate.
Embodiment 3
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: anthracite
=100: 30 mass ratio mix and allocate into carbide slag control compound dual alkalinity be 0.6, compound mix after make
Low coal blending amount pelletizing；According to roe shape high-phosphorus hematite: anthracite=100: 36 mass ratio mixes and allocates carbide slag control into
The dual alkalinity of compound is 0.6, and compound makes high coal blending amount pelletizing after mixing；The low coal blending amount pelletizing for preparing and height are matched somebody with somebody
After drying, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing to coal amount pelletizing,
Intermediate layer is that pelletizing is distributed in the material area of rotary hearth furnace and carries out reduction roasting, reduction roasting by the distributing mode of low coal blending amount pelletizing
1300 DEG C of temperature, after 40 minutes time, is processed such that it is able to obtaining gold respectively through mill choosing twice after gained metallized pellet water quenching
With tailings, category iron powder realizes that ferrum, phosphorus are separated, up to 93%, wherein in Iron concentrate, iron recovery is up to 92.31% for dephosphorization rate.
Embodiment 4
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: coking coal=
100: 15 mass ratio and allocate into carbide slag control compound dual alkalinity be 0.6, compound mix after make low coal blending
Amount pelletizing；According to roe shape high-phosphorus hematite: coking coal=100: 18 mass ratio, and allocate the binary that carbide slag controls compound into
Basicity is 0.6, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount pelletizing through dry
After dry, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing, and intermediate layer is matched somebody with somebody for low
Pelletizing is distributed in the material area of rotary hearth furnace by the distributing mode of coal amount pelletizing carries out reduction roasting, 1100 DEG C of reduction roasting temperature,
After 20 minutes time, process such that it is able to obtaining metal iron powder and tailings respectively through mill choosing twice after gained metallized pellet water quenching
Realize that ferrum, phosphorus are separated, up to 91%, iron recovery is up to 90.57% wherein in Iron concentrate for dephosphorization rate.
Embodiment 5
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: brown coal=
100: 30 mass ratio mix and allocate into carbide slag control compound dual alkalinity be 0.5, compound mix after make low
Coal blending amount pelletizing；According to roe shape high-phosphorus hematite: brown coal=100: 28 mass ratio mixes and allocates carbide slag control mixing into
The dual alkalinity of material is 0.5, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount
After drying, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing to pelletizing, middle
Pelletizing is distributed in the material area of rotary hearth furnace for the distributing mode of low coal blending amount pelletizing and carries out reduction roasting, reduction roasting temperature by floor
1250 DEG C, after 30 minutes time, process such that it is able to obtaining metallic iron respectively through mill choosing twice after gained metallized pellet water quenching
With tailings, powder realizes that ferrum, phosphorus are separated, up to 93%, wherein in Iron concentrate, iron recovery is up to 91.68% for dephosphorization rate.
Comparative example 1
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: coking coal=
100: 15 mass ratio and allocate into carbide slag control compound dual alkalinity be 0.2, compound mix after make low coal blending
Amount pelletizing；According to roe shape high-phosphorus hematite: coking coal=100: 24 mass ratio, and allocate the binary that carbide slag controls compound into
Basicity is 0.2, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount pelletizing through dry
After dry, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing, and intermediate layer is matched somebody with somebody for low
Pelletizing is distributed in the material area of rotary hearth furnace by the distributing mode of coal amount pelletizing carries out reduction roasting, 1100 DEG C of reduction roasting temperature,
After 20 minutes time, process such that it is able to obtaining metal iron powder and tailings respectively through mill choosing twice after gained metallized pellet water quenching
Realize that ferrum, phosphorus are separated, dephosphorization rate is 81%, iron recovery is 83.24% wherein in Iron concentrate.
Comparative example 2
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: brown coal=
100: 20 mass ratio mix and allocate into carbide slag control compound dual alkalinity be 0.7, compound mix after make low
Coal blending amount pelletizing；According to roe shape high-phosphorus hematite: brown coal=100: 27 mass ratio mixes and allocates carbide slag control mixing into
The dual alkalinity of material is 0.7, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount
After drying, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing to pelletizing, middle
Pelletizing is distributed in the material area of rotary hearth furnace for the distributing mode of low coal blending amount pelletizing and carries out reduction roasting, reduction roasting temperature by floor
1250 DEG C, after 30 minutes time, process such that it is able to obtaining metallic iron respectively through mill choosing twice after gained metallized pellet water quenching
With tailings, powder realizes that ferrum, phosphorus are separated, dephosphorization rate is 83%, and wherein in Iron concentrate, iron recovery is up to 85.12%.
Comparative example 3
Somewhere contains TFe42.66%, the roe shape high-phosphorus hematite containing P 0.22%；According to roe shape high-phosphorus hematite: brown coal=
100: 30 mass ratio mix and allocate into carbide slag control compound dual alkalinity be 0.7, compound mix after make low
Coal blending amount pelletizing；According to roe shape high-phosphorus hematite: brown coal=100: 28 mass ratio mixes and allocates carbide slag control mixing into
The dual alkalinity of material is 0.7, and compound makes high coal blending amount pelletizing after mixing；By the low coal blending amount pelletizing for preparing and high coal blending amount
After drying, along on the revolving burner bottom direction away from the rotary hearth furnace, bottom and top layer are high coal blending amount pelletizing to pelletizing, middle
Pelletizing is distributed in the material area of rotary hearth furnace for the distributing mode of low coal blending amount pelletizing and carries out reduction roasting, reduction roasting temperature by floor
1250 DEG C, after 30 minutes time, process such that it is able to obtaining metallic iron respectively through mill choosing twice after gained metallized pellet water quenching
With tailings, powder realizes that ferrum, phosphorus are separated, dephosphorization rate is 85%, and wherein in Iron concentrate, iron recovery is 87.44%.
Referring to Fig. 2, a kind of dedicated system for realizing processing method provided by the present invention, by raw material processing system
S100, balling-up system S200, reduction roasting system S300, mill select system S400 and acidleach processing system S500 composition；Wherein, institute
There is roe shape high phosphorus to go out iron mine entrance 101, reduction coal entrance 102, carbide slag entrance 103 and mixing to state raw material processing system S100
Material outlet 104；Balling-up system S200 there is compound entrance 201 and dry pelletizing outlet 202, the compound entrance with
The outlet of raw material processing system compound is connected；There is the reduction roasting system S300 pelletizing entrance 301 and metallized pellet to go out
Mouth 302, the pelletizing entrance dry pelletizing outlet with the balling-up system and are connected；The once mill selects system S400 that there is metal
Pellet entrance 401, metal iron powder outlet 402 and a tailings outlet 403；The secondary grinding selects system S500 that there is metallic iron
Powder entrance 501, Iron concentrate outlet 502 and secondary tailings outlet 503, the metal iron powder entrance select system gold with the once mill
Category iron powder outlet is connected.
Raw material processing system S100 includes drying plant, levigate equipment, screening plant and mixing apparatus；
Pelletizing system S200 includes balling-up equipment and drying equipment；
Described reduction roasting system S300 includes rotary hearth furnace and its supporting subsystem；
The once mill selects system S400 to include water quenching, ore grinding, magnetic separation filter plant；
The secondary grinding selects system S500 to include the equipment such as ore grinding, magnetic separation, filtration.
Claims (10)
1. a kind of processing method of roe shape high-phosphorus hematite, it is characterised in that comprise the following steps：
(1) preparation of low coal blending amount pelletizing：Roe shape high-phosphorus hematite, reduction coal and carbide slag mix homogeneously are obtained compound,
By compound pelletizing, low coal blending amount pelletizing is obtained；
The preparation of high coal blending amount pelletizing：Roe shape high-phosphorus hematite, reduction coal and carbide slag mix homogeneously are obtained compound, will be mixed
Material pelletizing is closed, high coal blending amount pelletizing is obtained；
Wherein, in high coal blending amount pelletizing, reduction coal is reduced higher than in low coal blending amount pelletizing with the consumption proportion of roe shape high-phosphorus hematite
Coal and the consumption proportion of roe shape high-phosphorus hematite；
(2) stepping into rotary hearth furnace after drying low coal blending amount pelletizing and high coal blending amount pelletizing carries out reduction roasting process, obtains metal
Pellet；
(3) metallized pellet carry out water quenching, once mill choosing after obtain metal iron powder and a tailings；
(4) metal iron powder is carried out secondary grinding choosing process and obtains Iron concentrate and secondary tailings.
2. according to the processing method described in claim 1, it is characterised in that：By roe shape high-phosphorus hematite, reduction coal and carbide slag
Be respectively dried, remix after levigate, screening, by compound pelletizing, respectively obtain low coal blending amount pelletizing or
High coal blending amount pelletizing.
3. according to the processing method described in claim 1, it is characterised in that：In obtained low coal blending amount pelletizing, roe shape high phosphorus
The mass ratio of bloodstone and reduction coal is 100：(15-30), amount of allocating of the carbide slag in compound is controlled in compound is made
CaO/SiO2Mass ratio in 0.3-0.6.
4. according to the processing method described in claim 1, it is characterised in that：In obtained high coal blending amount pelletizing, roe shape high phosphorus
The mass ratio of bloodstone and reduction coal is 100：(18-38), amount of allocating of the carbide slag in compound is controlled in compound is made
CaO/SiO2Mass ratio in 0.3-0.6.
5. according to the processing method described in claim 1, it is characterised in that：In carbide slag, the content of calcium hydroxide is more than or equal to
50wt%.
6. according to the processing method described in claim 1, it is characterised in that：The reduction coal is coking coal, brown coal or anthracite
Any one of or more than one according to arbitrary proportion constitute mixture.
7. according to the processing method described in claim 1, it is characterised in that：In step (2) inside the rotary hearth furnace, along remote
It is high coal blending amount pelletizing from bottom on the revolving burner bottom direction of the rotary hearth furnace and top layer, intermediate layer is the cloth of low coal blending amount pelletizing
Pelletizing is distributed in the material area of rotary hearth furnace and carries out reduction roasting by material mode.
8. according to the processing method described in claim 1, it is characterised in that：Described reduction roasting condition is：Reduction roasting temperature
Spend for 1100 DEG C～1300 DEG C, the reduction roasting time is 20min～40min.
9. the dedicated system of any one processing method described in claim 1-8 is realized, it is characterised in that：By Feedstock treating system
System (S100), balling-up system (S200), reduction roasting system (S300), mill select system (S400) and acidleach processing system (S500)
Composition；Wherein, raw material processing system (S100) there is roe shape high phosphorus to go out iron mine entrance, reduction coal entrance, carbide slag entrance
And compound outlet；Balling-up system (S200) have compound entrance and dry pelletizing outlet, the compound entrance with
The outlet of raw material processing system compound is connected；Reduction roasting system (S300) there is pelletizing entrance and metallized pellet to go out
Mouthful, the pelletizing entrance dries pelletizing outlet with the balling-up system and is connected；The once mill selects system (S400) that there is metal
Pellet entrance, metal iron powder outlet and a tailings outlet；The secondary grinding select system (S500) have metal iron powder entrance,
Iron concentrate outlet and secondary tailings are exported, and the metal iron powder entrance selects the outlet of system metal iron powder to be connected with the once mill.
10. according to the dedicated system described in claim 9, it is characterised in that：Raw material processing system (S100) includes drying
Equipment, levigate equipment, screening plant and mixing apparatus；Pelletizing system (S200) includes balling-up equipment and drying equipment；
Described reduction roasting system (S300) includes rotary hearth furnace and its supporting subsystem；The once mill selects system (S400) to include
Water quenching, ore grinding, magnetic separation and filter plant；The secondary grinding selects system (S500) to include the equipment such as ore grinding, magnetic separation, filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986380.XA CN106498155A (en) | 2016-11-09 | 2016-11-09 | A kind of processing method of roe shape high-phosphorus hematite and its dedicated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986380.XA CN106498155A (en) | 2016-11-09 | 2016-11-09 | A kind of processing method of roe shape high-phosphorus hematite and its dedicated system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106498155A true CN106498155A (en) | 2017-03-15 |
Family
ID=58323864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610986380.XA Pending CN106498155A (en) | 2016-11-09 | 2016-11-09 | A kind of processing method of roe shape high-phosphorus hematite and its dedicated system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106498155A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326198A (en) * | 2017-06-22 | 2017-11-07 | 江苏省冶金设计院有限公司 | A kind of processing method and system of high phosphorus low-grade manganese carbonate ore |
| CN113042201A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Iron-extracting and phosphorus-removing process for high-phosphorus hematite |
-
2016
- 2016-11-09 CN CN201610986380.XA patent/CN106498155A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326198A (en) * | 2017-06-22 | 2017-11-07 | 江苏省冶金设计院有限公司 | A kind of processing method and system of high phosphorus low-grade manganese carbonate ore |
| CN113042201A (en) * | 2021-03-30 | 2021-06-29 | 酒泉钢铁(集团)有限责任公司 | Iron-extracting and phosphorus-removing process for high-phosphorus hematite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100500887C (en) | Concentration method for iron and boron in low-grade paigeite | |
| CN106987673B (en) | A kind of method that selecting smelting combination is enriched with niobium from titaniferous ferro-niobium concentrate | |
| CN101418389B (en) | Method for directly reducing grain nickel iron in rotary kiln by using laterite nickle mine | |
| CN101386921A (en) | Method for separating V-Ti-Fe concentrate fines | |
| CN106676263A (en) | Method and system for comprehensive utilization of copper tailings and converter coarse dust ash | |
| CN103643034A (en) | Method for reducing granular ferronickel through laterite-nickel ore in two-stage rotary kiln | |
| CN105907947A (en) | Method for preparing iron powder and system for preparing iron powder | |
| CN101418388B (en) | Process for producing nickel iron in rotary kiln-blast furnace by using laterite nickle mine | |
| CN1861265B (en) | Ore-dressing process by using carbon-contg. block to reduce lean iron ore for prodn. of magnetite | |
| CN106636521A (en) | Method and system for improving grinding separation effect of reduced pellets containing metal iron | |
| CN105907990A (en) | Method of producing ferrocolumbium | |
| CN102921534B (en) | Method for recycling iron from serpentine asbestos rock type asbestos tailings | |
| CN106498155A (en) | A kind of processing method of roe shape high-phosphorus hematite and its dedicated system | |
| Kawaguchi et al. | Summarized achievements of the Porous Meso-mosaic Texture Sinter research project | |
| CN101864506A (en) | Method for preparing direct reduced iron from low-grade high-phosphorus high-silicon iron ore | |
| CN105734192A (en) | Beneficiation production method for low-grade hematite | |
| CN103805773B (en) | Powdered iron Ore Carbon cycle oxygen supplement direct-reduction produces metallization iron powder method | |
| CN105695734A (en) | Industrial production method for conducting iron increase and phosphorous reduction on high-phosphorus oolitic hematite | |
| CN102921536B (en) | Method for recycling chromium from serpentine asbestos rock type asbestos tailings | |
| CN102268533A (en) | Horizontally movable-fixed bed type magnetic reduction roasting process | |
| CN102921535B (en) | Method for recycling gold from serpentine asbestos rock type asbestos tailings | |
| CN107557567B (en) | A kind of method of high-phosphorus iron ore dephosphorization | |
| CN206385225U (en) | A kind of dedicated system for handling roe shape high-phosphorus hematite | |
| CN206385226U (en) | A kind of dedicated system for handling roe shape high-phosphorus hematite | |
| CN106498154A (en) | A kind of processing method of roe shape high-phosphorus hematite and its dedicated system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |