CN106586986A - System for processing phosphorite and application thereof - Google Patents
System for processing phosphorite and application thereof Download PDFInfo
- Publication number
- CN106586986A CN106586986A CN201611203044.XA CN201611203044A CN106586986A CN 106586986 A CN106586986 A CN 106586986A CN 201611203044 A CN201611203044 A CN 201611203044A CN 106586986 A CN106586986 A CN 106586986A
- Authority
- CN
- China
- Prior art keywords
- reduction
- outlet
- furnace
- gas
- rotary hearth
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/01—Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
Abstract
The invention discloses a system for processing phosphorite and applications thereof. The system for processing the phosphorite comprises a material mixing device, a shaping device, a drying device, a rotary hearth furnace and a hydration device. The rotary hearth furnace adopted by the system performs oxidation and reduction treatments on pellets including phosphorite and the like, a reduction reaction and an oxidation reaction of the phosphorite are separated by the rotary hearth furnace by a way of additionally arranging a radiant tube in a hearth, reduction of the phosphorite is completed in the annular hearth of the rotary hearth furnace, oxidation of phosphorus steam is completed in the radiant tube, heat released by the oxidation reaction is transferred to material spread at the bottom of the furnace to server as most of heat resources required by the reduction reaction. According to the system, a reduction reaction area and an oxidation reaction area are separated, respective smooth operation of the oxidation reaction and the reduction reaction can be ensured, so that product quality is ensured; furthermore, the reduction reaction and the oxidation reaction of phosphorus can be completed in the same rotary hearth furnace, so that heat released by the oxidization reaction is effectively utilized, operation costs are saved, and equipment investment is also saved.
Description
Technical field
The present invention relates to the system for processing phosphorus ore, and the method for the system process phosphorus ore using the process phosphorus ore.
Background technology
At present industrialized production phosphoric acid main method has thermal phosphoric acid, phosphoric acid by wet process and kiln-process phosphoric acid.Wherein, thermal phosphoric acid
Production method generally adopts now both at home and abroad is electric furnace two-step method, this method is by the distillation phosphorus obtained by electric furnace reduction phosphorus ore
Make phosphorus cooling be in a liquid state after dedusting, then the burning of liquid phosphorus Jing, aquation, demisting are made into phosphoric acid.The main body of the method sets
Standby is electric furnace, and in production process, electric furnace converts electrical energy into heat energy in the form of raw material resistance and motor electric arc, melts material
Melt, consume substantial amounts of electric energy, the method belongs to high energy consumption, the production method of high cost.Wet production is decomposed with mineral acid
Ground phosphate rock, isolates raw phosphoric acid, then purified rear prepared phosphoric acid product.Phosphoric acid by wet process method of specific heat phosphoric acid low cost 20%～
30%, in the leading position of phosphoric acid production.But the phosphoric acid purity of wet production is not high, and have problems in terms of environmental protection.Adopt
The atmospheric environment and subsoil water of the phosphogypsum slag to periphery of discharge, surface water are produced with the method to pollute.At kiln-process phosphoric acid
Reason main equipment is rotary kiln, is comprised the concrete steps that：Add Bentonite to make carbon pelletizing rock phosphate in powder, Silicon stone, carbonaceous reducing agent, returning
Reduction reaction and oxidation reaction are carried out in rotary kiln.Discharge the gaseous state P of kiln body2O5Phosphoric acid is generated Jing after hydration, into dense after cyclic absorption
Phosphoric acid.Compared with electric furnace process phosphoric acid, kiln-process phosphoric acid energy consumption is substantially reduced, but still suffers from problems with：First, there is kiln body ring formation to ask
Topic；2nd, kiln internal oxidition band and zone of reduction are difficult to well-separated, affect reduction reaction and oxidation reaction effect, the final phosphorus that affects
The response rate and product quality；3rd, balling technique is had high demands.Because oxidation reaction is carried out with reduction reaction in same equipment,
So material pelletizing surface need to be covered into integument, it is very big that the ball making process controls in process of production difficulty, is difficult to realize.Separately
Outward, with the reduction of high-grade phosphorus ore, in, the utilization of low-grade phosphate ore it is of increasing concern.
Thus, how to explore a resource wide accommodation and energy consumption is low, low cost, pollute little phosphorus ore processing equipment and
Technique, becomes problem demanding prompt solution.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this purpose, one object of the present invention
Be to propose a kind of system for processing phosphorus ore, the system using rotary hearth furnace by setting up radial canal in burner hearth by the way of by phosphorus
The reduction reaction and oxidation reaction of ore deposit is kept apart, wherein the reduction of phosphorus ore is completed in the annular hearth of rotary hearth furnace, in radiation
The oxidation of phosphorus steam is completed in pipe, oxidation reaction heat release is passed to the material for being laid on furnace bottom by radial canal, used as reduction reaction
Most of origin of heat needed for heat absorption.The system not only keeps apart in reduction reaction area and oxidation reaction zone, can ensure oxygen
Change reaction and reduction reaction is each smoothed out, so as to ensure product quality；And reduction, same equipment of oxidation reaction of phosphorus
Complete in rotary hearth furnace, both by oxidation reaction institute heat release energy effectively utilizes, save operating cost, equipment investment has been saved again.
According to an aspect of the present invention, the invention provides a kind of system for processing phosphorus ore.Enforcement of the invention
Example, the system of the process phosphorus ore includes：
Mixing device, the mixing device has phosphorus ore entrance, reducing agent entrance, Silicon stone entrance, binding agent entrance and mixes
Close material outlet；
Shaped device, the shaped device has the outlet of mixed material entrance, water inlet and aqueous pelletizing, the mixture
Material entrance is connected with mixed material outlet；
Drying unit, the drying unit has aqueous pelletizing entrance and is dried pelletizing outlet, the aqueous pelletizing entrance
It is connected with the aqueous pelletizing outlet；And
Rotary hearth furnace, the rotary hearth furnace includes：
Separate charge section, reduction section and the discharging section of setting successively using partition wall along Flow of Goods and Materials direction, wherein, the dress
Material section is provided with feed pieces, and the reduction section is provided with mixed gas outlet, and the discharging section is provided with outlet member, described
Feed pieces with it is described be dried pelletizing outlet be connected；
Multiple burners, the plurality of burner is circumferentially disposed at the reduction section；
Multiple radial canals, the plurality of radial canal is circumferentially disposed at the reduction section, and each radial canal is respectively provided with radiation
Pipe gas access, radial canal air conduit interface and radial canal gas outlet, the radial canal gas access and the reduction section
The mixed gas outlet be connected；
Hydrating apparatus, the hydrating apparatus have furnace gas entrance, phosphoric acid outlet and offgas outlet, the furnace gas entrance and institute
State radial canal gas outlet to be connected.
The system of process phosphorus ore according to embodiments of the present invention, the rotary hearth furnace of employing carries out oxygen to the pelletizing containing phosphorus ore etc.
Change reduction treatment, the rotary hearth furnace isolates the reduction reaction of phosphorus ore and oxidation reaction by way of setting up radial canal in burner hearth
Come, wherein completing the reduction of phosphorus ore in the annular hearth of rotary hearth furnace, the oxidation of phosphorus steam is completed in radial canal, oxidation is anti-
Answer heat release that the material for being laid on furnace bottom is passed to by radial canal, as the most of origin of heat needed for reduction reaction heat absorption.Should
System not only keeps apart in reduction reaction area and oxidation reaction zone, can ensure that oxidation reaction and reduction reaction are each smoothly entered
OK, so as to ensureing product quality；And complete in the reduction of phosphorus, same equipment rotary hearth furnace of oxidation reaction, both by oxidation reaction
Institute's heat release energy effectively utilizes, save operating cost, and equipment investment has been saved again.
In addition, the system for processing phosphorus ore according to the above embodiment of the present invention can also have following additional technology special
Levy：
Embodiments in accordance with the present invention, the system is further included：Dust arrester, the dust arrester has gas inlet
With offgas outlet after dedusting, the gas inlet is connected with the offgas outlet of the hydrating apparatus.
Embodiments in accordance with the present invention, the height of the radial canal is not higher than the height of the burner.
Embodiments in accordance with the present invention, the radial canal is located at rotary hearth furnace bottom top and is not higher than 80 centimeters.
Embodiments in accordance with the present invention, the radial canal and the burner are in be spaced apart.
Embodiments in accordance with the present invention, being shaped as the radial canal is U-shaped, W types or linear type.
Embodiments in accordance with the present invention, furnace bottom of the burner parallel to the rotary hearth furnace.
Embodiments in accordance with the present invention, the circular arc angle of the reduction section is not less than 220 °.
According to a further aspect in the invention, the invention provides a kind of system using aforesaid process phosphorus ore processes phosphorus ore
Method.Embodiments in accordance with the present invention, the method includes：
Phosphorus ore, reducing agent, Silicon stone and binding agent are delivered to into mixing device carries out mixed processing, to obtain mixture
Material；
The mixed material is delivered to into shaped device carries out forming processes, to obtain aqueous pelletizing；
The aqueous pelletizing is delivered to into drying unit carries out drying and processing, to obtain being dried pelletizing；
The charge section that pelletizing is delivered to rotary hearth furnace by feed pieces is dried by described, and reduction section described in Jing carries out also original place
Reason, to obtain the mixed gas and furnace charge of phosphorous steam and carbon monoxide, wherein, discharging section is described described in the furnace charge Jing
Outlet member is discharged, and the mixed gas carry out oxidation processes into radial canal, to obtain the furnace gas containing phosphorus pentoxide
And heat, the heat is used to carry out radiant heating to the pelletizing that is dried of the reduction section；And
The furnace gas containing phosphorus pentoxide is delivered to into the hydrating apparatus carries out hydration process, to obtain phosphoric acid
And tail gas.
The method of process phosphorus ore according to embodiments of the present invention, the rotary hearth furnace of employing carries out oxygen to the pelletizing containing phosphorus ore etc.
Change reduction treatment, the rotary hearth furnace isolates the reduction reaction of phosphorus ore and oxidation reaction by way of setting up radial canal in burner hearth
Come, wherein completing the reduction of phosphorus ore in the annular hearth of rotary hearth furnace, the oxidation of phosphorus steam is completed in radial canal, oxidation is anti-
Answer heat release that the material for being laid on furnace bottom is passed to by radial canal, as the most of origin of heat needed for reduction reaction heat absorption.Should
Method not only keeps apart in reduction reaction area and oxidation reaction zone, can ensure that oxidation reaction and reduction reaction are each smoothly entered
OK, so as to ensureing product quality；And complete in the reduction of phosphorus, same equipment rotary hearth furnace of oxidation reaction, both by oxidation reaction
Institute's heat release energy effectively utilizes, save operating cost, and equipment investment has been saved again.
Embodiments in accordance with the present invention, the reduction treatment is carried out under reducing atmosphere.
Embodiments in accordance with the present invention, the oxidation processes are carried out in an oxidizing atmosphere.
Embodiments in accordance with the present invention, the reducing agent is at least one in coal, semi-coke and white carbon black.
Embodiments in accordance with the present invention, the granularity of the phosphorus ore, the reducing agent and the Silicon stone is no more than 3mm.
Embodiments in accordance with the present invention, the amount of allocating of the reducing agent is 1.0-1.6 times of reaction theory amount.
Embodiments in accordance with the present invention, the temperature of the reduction treatment is 1100-1450 DEG C.
Embodiments in accordance with the present invention, the method is further included：Dust removal process is carried out to the tail gas, to be removed
Tail gas after dirt.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
It is substantially and easy to understand, wherein：
Fig. 1 shows the structural representation of the system of process phosphorus ore according to an embodiment of the invention；
Fig. 2 shows the structural representation of rotary hearth furnace according to an embodiment of the invention；
Fig. 3 shows the overlooking the structure diagram of rotary hearth furnace according to an embodiment of the invention；
Fig. 4 shows the flow process of the method that phosphorus ore is processed using the system for processing phosphorus ore according to an embodiment of the invention
Schematic diagram；
Fig. 5 shows the flow process of the method that phosphorus ore is processed using the system for processing phosphorus ore according to an embodiment of the invention
Schematic diagram；
Fig. 6 shows the structural representation of the system of the process phosphorus ore according to another embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, term " longitudinal direction ", " horizontal ", " on ", it is D score, "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom " is, based on orientation shown in the drawings or position relationship, to be only
For the ease of describing the present invention rather than requiring that the present invention must be with specific azimuth configuration and operation therefore it is not intended that right
The restriction of the present invention.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first " is defined, the feature of " second " can be with
Express or implicitly include one or more this feature.Further, in describing the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
According to an aspect of the present invention, the invention provides a kind of system for processing phosphorus ore.With reference to Fig. 1, according to this
Bright embodiment, the system of the process phosphorus ore includes：Mixing device 100, shaped device 200, drying unit 300, rotary hearth furnace 400
With hydrating apparatus 500.
The system of process phosphorus ore according to embodiments of the present invention is mainly for the treatment of phosphorus ore preparing phosphoric acid.The rotary hearth furnace is removed
Process high-grade phosphorus ore, in can also processing, low-grade phosphate ore, adapt to completely the phosphate rock resource of China more than 90% belong in,
The resources characteristic of low-grade phosphate ore, possesses powerful vitality and good development prospect.
Embodiments in accordance with the present invention, compared with thermal phosphoric acid, the system of the process phosphorus ore of the embodiment of the present invention is fully sharp
With the reaction heat of oxidizing process, oxidation reaction liberated heat is transferred to into rotary furnace bottom by radial canal, supplies phosphorus ore
Reduction process use, greatly reduce process energy consumption, improve energy utilization rate.Also, the reduction reaction of phosphorus and oxidation are anti-
Should complete in same equipment, equipment investment be reduced, so as to reduces cost.The rotary hearth furnace is reduced using common coal dust
Agent, does not require the use of the coke of costliness, not only avoid the environmental pollution of the burnt process of system, and reduces production cost.
Embodiments in accordance with the present invention, compared with kiln-process phosphoric acid, the system of the process phosphorus ore of the embodiment of the present invention will be reduced
Reaction is well-separated by radial canal with oxidation reaction, atmosphere needed for having ensured reduction reaction and oxidation reaction each, makes reaction
Each it is smoothed out, so as to ensure that production high-quality is carried out, to guarantee good technical specification, also, the percent reduction of phosphorus is high, reaches
To more than 85%.Additionally, the rotary hearth furnace of the embodiment of the present invention does not have kiln body ring formation, production direct motion is made.And, this turns bottom
The pelletizing manufacturing process that stove is adopted is simple to operation, is not required to carry out the secondary of pelletizing to wrap.Meanwhile, coal allocates in course of reaction
Amount is substantially reduced.
Embodiments in accordance with the present invention, compared with phosphoric acid by wet process, the system of the process phosphorus ore of the embodiment of the present invention is not present
The environmental problem that ardealite garbage is recycled, is also not required to product purification and impurity removal.
In order to make it easy to understand, below each device to processing the system of phosphorus ore is explained：
Mixing device 100：Embodiments in accordance with the present invention, the mixing device 100 have phosphorus ore entrance, reducing agent entrance,
The outlet of Silicon stone entrance, binding agent entrance and mixed material, for phosphorus ore, reducing agent, Silicon stone and binding agent to be carried out into mixed processing,
Obtain mixed material.
Shaped device 200：Embodiments in accordance with the present invention, the shaped device 200 have mixed material entrance, water inlet and
Aqueous pelletizing outlet, the mixed material entrance is connected with mixed material outlet, and mixed material is carried out into forming processes, obtains
To aqueous pelletizing.
Drying unit 300：Embodiments in accordance with the present invention, the drying unit 300 has aqueous pelletizing entrance and dry ball
Group's outlet, wherein, aqueous pelletizing entrance is connected with the outlet of aqueous pelletizing, and aqueous pelletizing is carried out into drying and processing, obtains dry ball
Group.
Rotary hearth furnace 400：With reference to Fig. 2 and 3, embodiments in accordance with the present invention, the rotary hearth furnace 400 includes：Along Flow of Goods and Materials side
To the charge section 410, reduction section 420 and the discharging section 430 that separate setting successively using partition wall 440, wherein, charge section 410 is arranged
There are feed pieces 411, reduction section 420 is provided with mixed gas outlet 421, and discharging section 430 is provided with outlet member 431, and this enters
Material part 431 is connected with pelletizing outlet is dried, and is dried pelletizing Jing feed pieces 411 and enters feed zone 410, by reduction section 420 pairs
It is dried pelletizing to be preheated, reduce generation phosphorus steam and CO, and discharges a large amount of heat energy, the impurity residue of reaction is by outlet member
431 discharge.Embodiments in accordance with the present invention, in rotary hearth furnace run duration, reduction section 420 is reducing atmosphere.According to the present invention
Embodiment, during phosphorus ore is reduced into phosphorus steam, the percent reduction of phosphorus can reach more than 85%.
Embodiments in accordance with the present invention, the P in the impurity residue of reaction2O5Content is less than 3%, can mix as cement ingredient
Enter in cement and recycle.Hereby it is achieved that the comprehensive reasonable of resource is utilized.
Embodiments in accordance with the present invention, the circular arc angle of reduction section 420 is not less than 220 °, wherein, circular arc angle refer to
The axle center of annular body of heater be the center of circle, the angle of the central angle corresponding to reduction section.Thus, can ensure reduction reaction fully carry out and
Burner and radial canal have enough arrangement spaces, are conducive to oxidation reaction to carry out, and reaction efficiency is higher.
Embodiments in accordance with the present invention, the setting of partition wall 440 can make reduction section 420 keep more preferable reducing atmosphere.
Embodiments in accordance with the present invention, multiple burners 450 are circumferentially disposed at reduction section 420.Burner 420 is used for reduction
Section 420 carries out the supplementary heating of burner mode.Embodiments in accordance with the present invention, in the starting stage of Phosphate ore reduction reaction, first open
Dynamic burner 450 is reduction reaction heat supply, and a large amount of heat transfers that reaction to be oxidized is released close a part of burner to reduction section,
During normal operation, rotary hearth furnace burner combustion is used as supplemental heat source.
Embodiments in accordance with the present invention, furnace bottom of the burner 450 parallel to rotary hearth furnace.Thus, the heat of Fire Radiation to furnace bottom
Amount is more uniform.
Embodiments in accordance with the present invention, multiple radial canals 460 are circumferentially disposed at reduction section 420, and each radial canal 460 is equal
With radial canal gas access, radial canal air conduit interface and radial canal gas outlet, wherein, radial canal gas access with also
The mixed gas outlet 421 of former section 420 is connected, and radial canal 460 contains phosphorus pentoxide for carrying out oxidation generation to phosphorus steam
Furnace gas, and discharge a large amount of heat energy, heat energy carries out radiant heating by the tube wall of radial canal to the material of reduction section 420.According to
Embodiments of the invention, are oxidizing atmosphere in rotary hearth furnace run duration, radial canal.
Embodiments in accordance with the present invention, the height of the radial canal 460 is not higher than the height of burner 450.Thus, in radial canal
Oxidation reaction heat release can be reduced the reduction reaction of section and make full use of, heat utilization efficiency is high.
Embodiments in accordance with the present invention, the radial canal 460 is located at rotary hearth furnace bottom top and is not higher than 80 centimeters.Thus,
Oxidation reaction heat release in radial canal can be reduced that the reduction reaction of section utilizes more fully, heat utilization efficiency is higher.
Embodiments in accordance with the present invention, the radial canal 460 and burner 450 are in be spaced apart.Thus, not only supply rotary hearth furnace
Heat is more uniformly distributed, and can as far as possible reduce the supplemental heat source of burner mode, more energy-conservation.
Embodiments in accordance with the present invention, radiation tube shape is unrestricted, can carry out rationally choosing then according to production needs.Root
According to some embodiments of the present invention, being shaped as the radial canal 460 is U-shaped, W types or linear type.
Embodiments in accordance with the present invention, the rotary hearth furnace 400 is further included：Actuating device 470, the actuating device 470 sets
Put below the furnace bottom of rotary hearth furnace and be connected with the furnace bottom, for driving ring-shaped furnace bottom to rotate.
Embodiments in accordance with the present invention, the rotary hearth furnace 400 is further included：Air line 480, the air line 480
In the outside of rotary hearth furnace burner hearth, the air line is connected with radial canal air conduit interface, and the air line is used to be rotary hearth furnace
Air source is provided.
Hydrating apparatus 500：Embodiments in accordance with the present invention, the hydrating apparatus 500 have furnace gas entrance, phosphoric acid outlet and tail
Gas is exported, and the furnace gas entrance is connected with the radial canal gas outlet, the furnace gas containing phosphorus pentoxide is carried out at aquation
Reason, obtains phosphoric acid and tail gas.
With reference to Fig. 6, embodiments in accordance with the present invention, the system is further included：Dust arrester 600, the dust arrester 600
With offgas outlet after gas inlet and dedusting, wherein, gas inlet is connected with the offgas outlet of hydrating apparatus 500, for right
Tail gas carries out dust removal process, obtains the tail gas after dedusting.Embodiments in accordance with the present invention, empty after the process of tail gas removing dust.
For the ease of understanding the aforesaid system for processing phosphorus ore, by turning in the system of the process phosphorus ore of the embodiment of the present invention
Bottom stove processes the technological principle of phosphorus ore and makes following elaboration：It is that one kind adopts carbonaceous pelletizing that rotary hearth furnace processes phosphorus ore, by turning bottom
The new technology of stove direct-reduction Phosphate Rock acid.The thermal source of technique is by the P for reacting production4, CO oxidation heat liberations, rotary hearth furnace burner
Heating and carbonaceous pelletizing in small part carbon burning three provide, wherein, with oxidation reaction heat release as main heating source, burner heating and
The burning of small part carbon in carbonaceous pelletizing is used as complementarity thermal source.
After carbonaceous pelletizing is heated to reduction temperature, there are following reduction reactions in rotary hearth furnace reduction section：
2Ca5(PO4)3F+15C+9SiO2→3/2P4+15CO+9(CaO·SiO2)+CaF2,
Δ H=28006kJ/kg is (with P4Meter).(1)
The P that above-mentioned reaction is escaped4And CO, radial canal is admitted to immediately, and following oxidation reaction occurs with air contact：
P4+5O2→2P2O5, Δ H=-25498kJ/kg is (with P4Meter)；(2)
CO+1/2O2→CO2, Δ H=-22154kJ/kg is (with P4Meter).(3)
By reaction equation (1) (2) (3), for 1kg phosphorus, the product P of reduction reaction (1)4And CO, during oxidation
Liberated heat needs far beyond the heat absorption that Phosphate ore reduction reacts (1), and still has rich heat for heating furnace charge, makes furnace charge
It is warming up to reaction temperature.The technical process of the present invention be phosphorus ore, Silicon stone and coal three be mixed in proportion, ball processed, drying is rearmounted
In rotary hearth furnace, the reduction and oxidation of phosphorus are completed in same equipment, i.e.,：At high operating temperatures, the phosphorus in phosphorus ore is in rotary hearth furnace
Reduction section is reduced by carbon, P4With vapor state effusion.Produced P4Radial canal is sent into CO complete oxidation reaction (radial canal
Connection air line), institute's liberated heat passes through the carbonaceous pelletizing of the radiant heat transfer to rotary furnace bottom of radial canal, for phosphorus ore
Needed for middle phosphorus heating and reduction reaction.
In addition, by above-mentioned reaction principle, the phosphorus in phosphorus ore is to be reduced into phosphorus to escape in gaseous state, each in phosphorus ore
Plant impurity to stay in residue, therefore the more phosphorus ore of impurity content can be used.Again because for the present invention phosphorus ore to add compared with
Many Silicon stone (SiO2) to improve its fusing point, so (containing SiO to siliceous phosphorus ore2It is more) for, it contains P2O5As little as 10%～
25% phosphorus ore can be used.That is, the present invention is except processing high-grade phosphorus ore, in also can processing, low-grade phosphate ore.
, wherein it is desired to explanation, in, low-grade phosphate ore refer to P2O5Phosphorus ore of the content less than 25%.
According to a further aspect in the invention, the invention provides a kind of system using aforesaid process phosphorus ore processes phosphorus ore
Method.With reference to Fig. 4, embodiments in accordance with the present invention, the method includes：
S100 mixed processing
Embodiments in accordance with the present invention, phosphorus ore, reducing agent, Silicon stone and binding agent are delivered to into mixing device is carried out at mixing
Reason, obtains mixed material.
Embodiments in accordance with the present invention, reducing agent is at least one in coal, semi-coke and white carbon black.Thus, using general
Logical coal dust makees reducing agent, does not require the use of the coke of costliness, not only avoid the environmental pollution of the burnt process of system, and reduces production
Cost.
Embodiments in accordance with the present invention, the granularity of phosphorus ore, reducing agent and Silicon stone is no more than 3mm.Thus, raw material connects
Contacting surface product is big, is conducive to the phosphorus in phosphorus ore to be fully oxidized reduction and generates phosphorus pentoxide, and the response rate of phosphorus is high.
Embodiments in accordance with the present invention, the amount of allocating of reducing agent is 1.0-1.6 times of reaction theory amount.Thus, reducing agent
Fully the phosphorus in phosphorus ore is reduced to into P4, it is to avoid a large amount of reducing agent excess, cause wastage of material.
S200 forming processes
Embodiments in accordance with the present invention, mixed material is delivered to into shaped device carries out forming processes, obtains aqueous pelletizing.
Thus, the particle diameter of raw material is suitable, is easy to rotary hearth furnace to be processed.
S300 drying and processings
Embodiments in accordance with the present invention, aqueous pelletizing is delivered to into drying unit carries out drying and processing, obtains being dried pelletizing.
Thus, the part moisture of aqueous pelletizing is removed.
The process of S400 oxidoreductions
Embodiments in accordance with the present invention, will be dried pelletizing and be delivered to by feed pieces the charge section of rotary hearth furnace, and Jing is reduced
Duan Jinhang reduction treatments, obtain the mixed gas and furnace charge of phosphorous steam and carbon monoxide, wherein, the discharging of furnace charge Jing discharging sections
Part is discharged.Specifically, pelletizing Jing feed pieces are dried and enter feed zone, preheated, reduced to being dried pelletizing by reduction section
The mixed gas of phosphorous steam and carbon monoxide are generated, and discharges a large amount of heat energy, the impurity residue of reaction is discharged by outlet member.
Mixed gas carry out oxidation processes into radial canal, obtain the furnace gas containing phosphorus pentoxide and heat, and the heat is used for pair also
The pelletizing that is dried of former section carries out radiant heating.Radial canal carries out oxidation to phosphorus steam and generates the furnace gas containing phosphorus pentoxide, and
A large amount of heat energy are discharged, heat energy carries out radiant heating by the tube wall of radial canal to the material of reduction section 420.Reality of the invention
Example is applied, during phosphorus ore is reduced into phosphorus steam, the percent reduction of phosphorus can reach more than 85%.
Embodiments in accordance with the present invention, reduction treatment is carried out under reducing atmosphere.Thus, reduction treatment is conducive to
Carry out.
Embodiments in accordance with the present invention, oxidation processes are carried out in an oxidizing atmosphere.Thus, oxidation processes are conducive to
Carrying out.
Embodiments in accordance with the present invention, the temperature of reduction treatment is 1100-1450 DEG C.Thus, the activity of reduction treatment is high,
Response speed is fast.
Embodiments in accordance with the present invention, the method is further included：Dust removal process is carried out to the tail gas, to be removed
Tail gas after dirt.
Embodiments in accordance with the present invention, empty after the process of tail gas removing dust.
S500 hydration process
Embodiments in accordance with the present invention, the furnace gas containing phosphorus pentoxide is delivered to into hydrating apparatus carries out hydration process,
Obtain phosphoric acid and tail gas.
Below with reference to specific embodiment, the present invention will be described, it should be noted that these embodiments are only explanation
Property, and be not considered as limiting the invention.
Embodiment 1
Process phosphorus ore using the system of the process phosphorus ore of the embodiment of the present invention and prepare phosphoric acid, the flow process of process as shown in figure 5,
Comprise the following steps that：
The levigate phosphorus ore for accounting for more than 60% to 200 mesh is mixed homogeneously according to a certain percentage with semi-coke, Silicon stone and binding agent
And use disc balling machine pelletizing, wherein P2O5Grade is 22%, and the addition of semi-coke is 1.1 times of theoretical requirement, Silicon stone addition
The 11% of amount phosphorus ore weight, binding agent chooses sodio raw material and bentonite, afterwards will system under the conditions of 100-200 DEG C with drying grate
The carbonaceous pelletizing for obtaining is dried to moisture less than 1%, and dried carbonaceous pelletizing is distributed into rotary hearth furnace and is preheated, reduced, reduction temperature
1300 DEG C of degree, rotary hearth furnace rotating speed is controlled in 40min/r, and conversion zone annulus angle is 320 DEG C.Obtain after reduction containing P4With CO's
Gaseous state thing sends into U-shaped radial canal by rotary hearth furnace exhanst gas outlet, and radial canal connects with rotary hearth furnace air line and is to ensure in pipe
There is oxidation reaction and discharge big calorimetric in oxidizing atmosphere, the gas for sending into radial canal, heat is containing for furnace bottom by U-tube
Carbon pellets radiant heating, U-tube is 30cm with the vertical dimension of rotary hearth furnace ring-type furnace bottom, to guarantee the efficient profit of radiant heat transfer
With.The furnace gas for discharging the rotary hearth furnace of U-tube is directly entered hydrated tower, and by recycle acid P is absorbed2O5Industrial phosphoric acid is made, tail gas Jing is electric
Empty after cleaner unit.The furnace charge that rotary hearth furnace is discharged sends into the secondary utilization in cement plant after collecting.In the reduction that reduction reaction area occurs
During, the percent reduction of phosphorus reaches 86%.Wherein, in the starting stage of Phosphate ore reduction reaction, whole burners are first started for reduction
Reaction heat supply, a large amount of heat transfers that reaction to be oxidized is released close 2/3 burner to conversion zone, during normal operation, turn bottom
Stove burner combustion is used as supplemental heat source.
Embodiment 2
Process phosphorus ore using the system of the process phosphorus ore of the embodiment of the present invention and prepare phosphoric acid, the flow process of process as shown in figure 5,
Comprise the following steps that：
- 2mm will be crushed to account for more than 90% phosphorus ore and mix homogeneously according to a certain percentage simultaneously with brown coal, Silicon stone and binding agent
Use ball press pressure ball, wherein P2O5Grade is 28%, and the addition of brown coal is 1.3 times of theoretical requirement, Silicon stone addition phosphorus ore
The 3% of weight, binding agent adopts liquid-containing binder, the pelletizing of compacting dry to moisture～4% be distributed into rotary hearth furnace preheated,
Reduction, 1300 DEG C of reduction temperature, rotary hearth furnace rotating speed is controlled in 60min/r, and conversion zone annulus angle is 290 DEG C.Obtain after reduction
Containing P4W type radial canals are sent into by rotary hearth furnace exhanst gas outlet with the gaseous state thing of CO, radial canal is connected with rotary hearth furnace air line
To ensure in pipe as oxidizing atmosphere, there is oxidation reaction and discharge big calorimetric in the gas for sending into radial canal, heat passes through spoke
Carbonaceous pelletizing radiant heating of the pipe for furnace bottom is penetrated, radial canal is 50cm with the vertical dimension of rotary hearth furnace ring-type furnace bottom, to guarantee spoke
Penetrate the efficient utilization of heat transfer.Phosphoric acid is made after the furnace gas aquation of the rotary hearth furnace for discharging radial canal, is emptied after tail gas removing dust.Turn bottom
The furnace charge that fire grate goes out sends into the secondary utilization in cement plant after collecting.In the reduction process that reduction reaction area occurs, the percent reduction of phosphorus
Reach 90%.Wherein, in the starting stage of Phosphate ore reduction reaction, it is reduction reaction heat supply first to start whole burners, to be oxidized anti-
The a large amount of heat transfers that should be released close the burner of half quantity, during normal operation, rotary hearth furnace burner combustion to conversion zone
Use as supplemental heat source.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
These embodiments can be carried out with various changes, modification, replacement and modification in the case of the principle and objective that depart from the present invention, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. it is a kind of process phosphorus ore system, it is characterised in that include：
Mixing device, the mixing device has phosphorus ore entrance, reducing agent entrance, Silicon stone entrance, binding agent entrance and mixture
Material outlet；
Shaped device, the shaped device has the outlet of mixed material entrance, water inlet and aqueous pelletizing, and the mixed material enters
Mouth is connected with mixed material outlet；
Drying unit, the drying unit has aqueous pelletizing entrance and is dried pelletizing outlet, the aqueous pelletizing entrance and institute
State aqueous pelletizing outlet to be connected；And
Rotary hearth furnace, the rotary hearth furnace includes：
Separate charge section, reduction section and the discharging section of setting successively using partition wall along Flow of Goods and Materials direction, wherein, the charge section
Feed pieces are provided with, the reduction section is provided with mixed gas outlet, and the discharging section is provided with outlet member, the charging
Part with it is described be dried pelletizing outlet be connected；
Multiple burners, the plurality of burner is circumferentially disposed at the reduction section；
Multiple radial canals, the plurality of radial canal is circumferentially disposed at the reduction section, and each radial canal is respectively provided with radial canal gas
Body entrance, radial canal air conduit interface and radial canal gas outlet, the institute of the radial canal gas access and the reduction section
State mixed gas outlet to be connected；
Hydrating apparatus, the hydrating apparatus have furnace gas entrance, phosphoric acid outlet and offgas outlet, the furnace gas entrance and the spoke
She Guan gas outlets are connected.
2. system according to claim 1, it is characterised in that further include：
Dust arrester, the dust arrester has offgas outlet after gas inlet and dedusting, the gas inlet and the aquation
The offgas outlet of device is connected.
3. system according to claim 1 and 2, it is characterised in that the height of the radial canal is not higher than the burner
Highly,
Optionally, the radial canal is located at rotary hearth furnace bottom top and is not higher than 80 centimeters,
Optionally, the radial canal and the burner are in be spaced apart,
Optionally, the radial canal is shaped as U-shaped, W types or linear type.
4. the system according to any one of claim 1-3, it is characterised in that stove of the burner parallel to the rotary hearth furnace
Bottom.
5. the system according to any one of claim 1-4, it is characterised in that the circular arc angle of the reduction section is not less than
220°。
6. the method that a kind of system of the process phosphorus ore described in any one of utilization claim 1-5 processes phosphorus ore, it is characterised in that
Including：
Phosphorus ore, reducing agent, Silicon stone and binding agent are delivered to into mixing device carries out mixed processing, to obtain mixed material；
The mixed material is delivered to into shaped device carries out forming processes, to obtain aqueous pelletizing；
The aqueous pelletizing is delivered to into drying unit carries out drying and processing, to obtain being dried pelletizing；
The charge section that pelletizing is delivered to rotary hearth furnace by feed pieces is dried by described, and reduction section described in Jing carries out reduction treatment,
To obtain the mixed gas and furnace charge of phosphorous steam and carbon monoxide, wherein, go out described in discharging section described in the furnace charge Jing
Material part is discharged, and the mixed gas carry out oxidation processes into radial canal, so as to obtain the furnace gas containing phosphorus pentoxide and
Heat, the heat is used to carry out radiant heating to the pelletizing that is dried of the reduction section；And
The furnace gas containing phosphorus pentoxide is delivered to into the hydrating apparatus carries out hydration process, to obtain phosphoric acid and tail
Gas.
7. method according to claim 6, it is characterised in that the reduction treatment is carried out under reducing atmosphere,
Optionally, the oxidation processes are carried out in an oxidizing atmosphere,
Optionally, the reducing agent is at least one in coal, semi-coke and white carbon black,
Optionally, the granularity of the phosphorus ore, the reducing agent and the Silicon stone is no more than 3mm.
8. the method according to claim 6 or 7, it is characterised in that the amount of allocating of the reducing agent is reaction theory amount
1.0-1.6 again.
9. the method according to any one of claim 6-8, it is characterised in that the temperature of the reduction treatment is 1100-
1450℃。
10. the method according to any one of claim 6-9, it is characterised in that further include：
Dust removal process is carried out to the tail gas, to obtain dedusting after tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203044.XA CN106586986A (en) | 2016-12-23 | 2016-12-23 | System for processing phosphorite and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611203044.XA CN106586986A (en) | 2016-12-23 | 2016-12-23 | System for processing phosphorite and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106586986A true CN106586986A (en) | 2017-04-26 |
Family
ID=58603157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611203044.XA Pending CN106586986A (en) | 2016-12-23 | 2016-12-23 | System for processing phosphorite and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106586986A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968311A (en) * | 2009-07-28 | 2011-02-09 | 吴道洪 | Radiant tube isolated smoke gas heating rotary hearth furnace |
| CN102992285A (en) * | 2012-12-19 | 2013-03-27 | 西安瑞驰节能工程有限责任公司 | Method and equipment for producing yellow phosphorus by utilizing closed annular heating furnace |
| CN203715271U (en) * | 2014-01-15 | 2014-07-16 | 北京神雾环境能源科技集团股份有限公司 | Device for preparing synthetic gas by partial oxidation of natural gas in radiant tube |
| CN106185851A (en) * | 2016-09-13 | 2016-12-07 | 江苏省冶金设计院有限公司 | A kind of dry bulb pyrolysis-type phosphoric acid preparation system and method |
| CN206384846U (en) * | 2016-12-23 | 2017-08-08 | 江苏省冶金设计院有限公司 | The system for handling phosphorus ore |
-
2016
- 2016-12-23 CN CN201611203044.XA patent/CN106586986A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968311A (en) * | 2009-07-28 | 2011-02-09 | 吴道洪 | Radiant tube isolated smoke gas heating rotary hearth furnace |
| CN102992285A (en) * | 2012-12-19 | 2013-03-27 | 西安瑞驰节能工程有限责任公司 | Method and equipment for producing yellow phosphorus by utilizing closed annular heating furnace |
| CN203715271U (en) * | 2014-01-15 | 2014-07-16 | 北京神雾环境能源科技集团股份有限公司 | Device for preparing synthetic gas by partial oxidation of natural gas in radiant tube |
| CN106185851A (en) * | 2016-09-13 | 2016-12-07 | 江苏省冶金设计院有限公司 | A kind of dry bulb pyrolysis-type phosphoric acid preparation system and method |
| CN206384846U (en) * | 2016-12-23 | 2017-08-08 | 江苏省冶金设计院有限公司 | The system for handling phosphorus ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10101087B2 (en) | Method of comprehensively utilizing high-temperature slag balls exiting rotary kiln in kiln process for producing phosphoric acid, and process system thereof | |
| US10005669B2 (en) | Method for mass production of phosphoric acid with rotary kiln | |
| WO2010025620A1 (en) | Method and device for producing yellow phosphorus or phosphoric acid by vertical airtight smoke-baffle kiln | |
| CN104555946A (en) | Method for jointly producing sulphuric acid and cement clinker by using sulphur gas to reduce gypsum | |
| CN104211033A (en) | Equipment for preparation of phosphoric acid from kiln-discharged flue gas of kiln-method phosphoric acid technology | |
| CN102765706A (en) | Method for producing phosphoric acid through ground phosphate rock in fast hot-melting mode | |
| CN105752956A (en) | Method and system for preparing phosphoric acid | |
| CN101172587B (en) | Method for producing phosphorus pentoxide by phosphorus ore fusion | |
| CN101172588B (en) | Method for producing phosphorus pentoxide by phosphorus ore fusion | |
| CN206384846U (en) | The system for handling phosphorus ore | |
| CN100575249C (en) | The method of preparing phosphorus pentoxide by combustion dynamic wave | |
| CN1683238B (en) | Method for simultaneously producing yellow phosphorous and cement clinker or calcium carbide | |
| CN105217581B (en) | A kind of method of chemical gypsum and carbide slag comprehensive utilization | |
| CN106185851A (en) | A kind of dry bulb pyrolysis-type phosphoric acid preparation system and method | |
| CN101172589B (en) | Method for direct production of phosphorus pentoxide with phosphorus ore | |
| CN206384844U (en) | Rotary hearth furnace | |
| CN206384843U (en) | The system for handling phosphorus ore | |
| CN206384845U (en) | Rotary hearth furnace | |
| CN106586986A (en) | System for processing phosphorite and application thereof | |
| CN108408705A (en) | A kind of phosphoric acid production device and production method based on multistage fluidized bed | |
| CN106698370A (en) | Rotary hearth furnace | |
| CN109775677A (en) | A method of production phosphoric acid is combined with shaft kiln using reverberatory furnace | |
| CN206069375U (en) | A kind of wet lump ore is with addition of char particle type phosphoric acid preparation system | |
| CN106517121A (en) | System for processing phosphorite and application thereof | |
| CN101172590B (en) | Method for direct production of phosphorus pentoxide with phosphorus ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20190726 |