CN206384844U - Rotary hearth furnace - Google Patents
Rotary hearth furnace Download PDFInfo
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- CN206384844U CN206384844U CN201621415411.8U CN201621415411U CN206384844U CN 206384844 U CN206384844 U CN 206384844U CN 201621415411 U CN201621415411 U CN 201621415411U CN 206384844 U CN206384844 U CN 206384844U
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Abstract
The utility model discloses rotary hearth furnace.The rotary hearth furnace includes：Toroidal shell；Rotatable ring-shaped furnace bottom, heat transfer plate, air duct, lower floor's furnace chamber gas vent, upper strata furnace chamber gas access, upper strata furnace chamber air intake and upper strata furnace chamber gas vent.The rotary hearth furnace is by setting heat transfer plate, reduction reaction and oxidation reaction are clearly divided, ensure heat energy efficiently using and reduction reaction and oxidation reaction each on the premise of required atmosphere, reduction reaction and oxidation reaction is each smoothed out, so as to ensure product quality.And by the way that upper strata furnace chamber oxidation reaction liberated heat is transferred into lower floor's furnace chamber by heat transfer plate, the reduction process of supply phosphorus ore is used, and making the energy consumption of rotary hearth furnace is significantly reduced, and energy utilization rate is significantly improved.
Description
Technical field
The utility model is related to rotary hearth furnace.
Background technology
Current rotary hearth furnace is mainly used to reduce ferrous material, does not also handle technique of the phosphorus ore to prepare phosphoric acid with rotary hearth furnace
Occur.
The main method of current industrialization Phosphate Rock acid has thermal phosphoric acid, phosphoric acid by wet process and kiln-process phosphoric acid.Wherein,
What the production method of thermal phosphoric acid was generally used both at home and abroad now is electric furnace two-step method, and this method is by obtained by electric furnace reduction phosphorus ore
Distillation phosphorus make after dedusting phosphorus cooling be in a liquid state, phosphoric acid then is made through burning, aquation, demisting in liquid phosphorus.This method
Main equipment be electric furnace, production process, electric furnace converts electrical energy into heat energy in the form of raw material resistance and motor electric arc, makes
Material melts, consume substantial amounts of electric energy, and this method belongs to high energy consumption, the production method of high cost.Wet production is with inorganic
Sour decomposing rock phosphate with hydrogen, isolates raw phosphoric acid, then purified rear obtained phosphoric acid product.Phosphoric acid by wet process method of specific heat phosphoric acid cost is low by 20%
~30%, the leading position in phosphoric acid production.But the phosphoric acid purity of wet production is not high, and there is in terms of environmental protection problem.
Atmospheric environment and underground water of the phosphogypsum slag to periphery of discharge, surface water are produced using the method to pollute.Kiln-process phosphoric acid
It is rotary kiln to handle main equipment, is comprised the concrete steps that：Add bentonite that carbon pelletizing is made rock phosphate in powder, silica, carbonaceous reducing agent,
Reduction reaction and oxidation reaction are carried out in rotary kiln.Discharge the gaseous state P of kiln body2O5Generated after hydration after phosphoric acid, cyclic absorption into
Concentrated 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
Problem；2nd, kiln internal oxidition band and zone of reduction are difficult to well-separated, influence reduction reaction and oxidation reaction effect, finally influence phosphorus
The rate of recovery and product quality；3rd, high is required to balling technique.Because oxidation reaction is entered with reduction reaction in same equipment
OK, so material pelletizing surface need to be covered into integument, the ball making process controls difficulty very big, is difficult reality in process of production
It is existing.
In addition, with the reduction of high-grade phosphorus ore, in, the utilization of low-grade phosphate ore it is of increasing concern.How one is explored
Bar resource wide adaptation range and energy consumption is low, cost is low, pollution is small phosphorus ore processing equipment and technique, are asked as urgently to be resolved hurrily
Topic.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.Therefore, of the present utility model
One purpose is to propose a kind of rotary hearth furnace, by setting heat transfer plate, and reduction reaction and oxidation reaction are clearly divided,
On the premise of ensureing that heat energy is efficiently utilized, reduction reaction and oxidation reaction is set each to be smoothed out, so as to ensure product quality.
According to one side of the present utility model, the utility model provides a kind of rotary hearth furnace.According to of the present utility model
Embodiment, the rotary hearth furnace includes：
Toroidal shell；
Rotatable ring-shaped furnace bottom, the ring-shaped furnace bottom is arranged in the toroidal shell, and common with the toroidal shell
It is same to limit furnace chamber space；
Heat transfer plate, the heat transfer plate is arranged in the furnace chamber space, and the furnace chamber space is divided into upper strata furnace chamber
With lower floor's furnace chamber, lower floor's furnace chamber is divided into the charging chamber of bottom connection successively using partition wall along Flow of Goods and Materials direction,
Reduce chamber and discharge chamber, wherein, the charging chamber has a cloth part, the cloth part from the charging chamber to
On extend to outside the toroidal shell, it is described reduction chamber there is heater block, the discharge chamber has outlet member；
Air duct, the air duct is arranged on the outside in the furnace chamber space, and the air duct has multiple points
Branch air pipe line；
Lower floor's furnace chamber gas vent, lower floor's furnace chamber gas vent is located on the side wall of reduction chamber；
Upper strata furnace chamber gas access, the upper strata furnace chamber gas access is located on the side wall of upper strata furnace chamber or the circular casing
The top of body, the upper strata furnace chamber gas access is connected with lower floor's furnace chamber gas vent；
Upper strata furnace chamber air intake, the upper strata furnace chamber air intake is located on the side wall of upper strata furnace chamber or the circular casing
The top of body, and be connected with the branching air pipeline；And
Upper strata furnace chamber gas vent, the upper strata furnace chamber gas vent is located on the side wall of upper strata furnace chamber.
According to the rotary hearth furnace of the utility model embodiment, by setting heat transfer plate, reduction reaction and oxidation reaction are carried out
Clearly divide, ensure heat energy efficiently using and reduction reaction and oxidation reaction each on the premise of required atmosphere, make reduction anti-
Answer and oxidation reaction is each smoothed out, so as to ensure product quality.And the heat by the way that upper strata furnace chamber oxidation reaction is released
Amount is transferred to lower floor's furnace chamber by heat transfer plate, and the reduction process of supply phosphorus ore is used, and making the energy consumption of rotary hearth furnace significantly reduces, energy profit
Significantly improved with rate.
In addition, can also have technical characteristic additional as follows according to the rotary hearth furnace of the utility model above-described embodiment：
Optionally, the upper strata furnace chamber gas access be located at the outlet member surface or neighbouring outlet member just
Top, and lower floor's furnace chamber gas vent be located at the surface of the cloth part or the neighbouring cloth part just on
Side.
Optionally, the height of the upper strata furnace chamber is not more than 30 centimetres.
Optionally, the height of lower floor's furnace chamber is not more than 80 centimetres.
Optionally, the rotary hearth furnace further comprises：Heat-resisting pipeline, the heat-resisting pipeline and lower floor's furnace chamber gas vent
It is connected with the upper strata furnace chamber gas access.
Optionally, the upper strata furnace chamber air intake and the upper strata furnace chamber gas access are at least one, and described
Upper strata furnace chamber air intake and the upper strata furnace chamber gas access are corresponded.
Optionally, the opening of the upper strata furnace chamber air intake is through the top of the toroidal shell or the side of upper strata furnace chamber
Wall is simultaneously connected, and the branching air pipeline is perpendicular to the top of the toroidal shell or upper strata stove with the branching air pipeline
The side wall of chamber.
Optionally, the rotary hearth furnace further comprises：Pneumatic shuttle, the pneumatic shuttle and the branching air pipeline phase
Even.
Optionally, the circular arc angle of the reduction chamber is not less than 200 degree.
Optionally, the heater block is electric heating element and/or gas heating part.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
Fig. 1 shows the structural representation of the rotary hearth furnace according to the utility model one embodiment.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right",
The orientation or position relationship of the instruction such as " vertical ", " level ", " top ", " bottom " be based on orientation shown in the drawings or position relationship,
It is for only for ease of description the utility model rather than requires that the utility model must be with specific azimuth configuration and operation, therefore
It is not intended that to limitation of the present utility model.
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, define " first ", the feature of " second " can be with
Express or implicitly include one or more this feature.Further, in description of the present utility model, unless otherwise
Illustrate, " multiple " are meant that two or more.
According to one side of the present utility model, the utility model provides a kind of rotary hearth furnace.According to of the present utility model
Embodiment, the rotary hearth furnace includes：Toroidal shell 100, rotatable ring-shaped furnace bottom 200, heat transfer plate 300, air duct 400, under
Layer furnace chamber gas vent 110, upper strata furnace chamber gas access 120, upper strata furnace chamber air intake 130 and upper strata furnace chamber gas vent
140。
According to the rotary hearth furnace of the utility model embodiment mainly for the treatment of phosphorus ore to prepare phosphoric acid.The rotary hearth furnace is except place
Manage high-grade phosphorus ore, in can also handling, low-grade phosphate ore, adapt to completely the phosphate rock resource of China more than 90% belong in, low product
The resources characteristic of position phosphorus ore, possesses powerful vitality and good development prospect.
According to embodiment of the present utility model, compared with thermal phosphoric acid, the rotary hearth furnace of the utility model embodiment is fully sharp
With the reaction heat of oxidizing process, oxidation reaction liberated heat is transferred to rotary furnace bottom by radiant tube, phosphorus ore is supplied
Reduction process use, greatly reduce process energy consumption, improve energy utilization rate.Also, the reduction reaction of phosphorus and oxidation are anti-
It should be completed in same equipment, equipment investment be reduced, so as to reduce cost.The rotary hearth furnace is reduced using common coal dust
Agent, without the use of expensive coke, not only avoid the environmental pollution of the burnt process of system, and reduce production cost.
According to embodiment of the present utility model, compared with kiln-process phosphoric acid, the rotary hearth furnace of the utility model embodiment will be reduced
Reaction is well-separated by radiant tube with oxidation reaction, atmosphere needed for having ensured reduction reaction and oxidation reaction each, makes reaction
Each it is smoothed out, is carried out so as to ensure that production is high-quality, to ensure good technical indicator, also, the percent reduction of phosphorus is high, reaches
To more than 85%.In addition, kiln body ring formation problem is not present in the rotary hearth furnace of the utility model embodiment, make production direct motion.Moreover, should
The pelletizing manufacturing process that rotary hearth furnace is used is simple to operation, is not required to progress the secondary of pelletizing and wraps.Meanwhile, coal in course of reaction
Amount of allocating is substantially reduced.
According to embodiment of the present utility model, compared with phosphoric acid by wet process, the rotary hearth furnace of the utility model embodiment is not present
The environmental problem that ardealite discarded object is recycled, is also not required to product purification and impurity removal.
In order to make it easy to understand, each part of rotary hearth furnace is explained below：
Toroidal shell 100：According to embodiment of the present utility model, the toroidal shell 100 is limited jointly with ring-shaped furnace bottom 200
Come out of the stove cavity space 500, reduction reaction and oxidation reaction are carried out in furnace chamber space 500.
Rotatable ring-shaped furnace bottom 200：According to embodiment of the present utility model, the ring-shaped furnace bottom 200 is arranged on circular casing
In body 100, and furnace chamber space 500 is limited jointly with toroidal shell 100, reduction reaction and oxygen are carried out in furnace chamber space 500
Change reaction, air duct (not shown) is arranged on the outside in furnace chamber space 500, and the air duct has multiple branching airs
Pipeline, for providing air for oxidation reaction.
Heat transfer plate 300：According to embodiment of the present utility model, the heat transfer plate 300 is arranged in furnace chamber space 500, and will
Furnace chamber space 500 is divided into upper strata furnace chamber 510 and lower floor's furnace chamber 520.According to embodiment of the present utility model, partition wall 530 is utilized
Lower floor's furnace chamber 520 is divided into the charging chamber 521 of bottom connection, reduction chamber 522 and discharging successively along Flow of Goods and Materials direction
Chamber 523, wherein, charging chamber 521 has cloth part 524, and the cloth part 524 is extended upwardly to by charging chamber 521
Outside toroidal shell 100, reduction chamber 522 has heater block 525, and lower floor's furnace chamber gas vent 526 is located at reduction chamber 522
Side wall on, discharge chamber 523 have outlet member 527.Raw material enters lower floor's furnace chamber 520 by cloth part 524, in reduction chamber
Room 522 carries out reduction reaction, and phosphorous raw material reduction generation phosphorus steam and CO is discharged a large amount of heat energy by reducing agent, phosphorus steam and
CO is discharged by lower floor's furnace chamber gas vent 526, and enters upper strata chamber 510, the impurity of reaction through upper strata furnace chamber gas access 511
Residue is discharged by outlet member 527.According to embodiment of the present utility model, upper strata furnace chamber 510 has upper strata furnace chamber gas access
511st, upper strata furnace chamber air intake (not shown) and upper strata furnace chamber gas vent 512, wherein, upper strata furnace chamber gas access
511 be located on the side wall of upper strata furnace chamber 510 or toroidal shell 100 top, upper strata furnace chamber gas access 511 and lower floor's furnace chamber gas
Body outlet 526 is connected, and oxidation reaction is carried out for phosphorus steam and CO to be delivered into upper strata furnace chamber；Upper strata furnace chamber air intake is located at
On the side wall of upper strata furnace chamber 510 or toroidal shell 100 top, and be connected with branching air pipeline, for for oxidation reaction it is defeated
Send air；Upper strata furnace chamber gas vent 512 is located on the side wall of upper strata furnace chamber 510, five oxidations two for discharging oxidation production
Phosphorus and carbon dioxide.In the furnace chamber of upper strata, with oxygen oxidation reaction occurs for phosphorus steam and CO, discharges substantial amounts of heat, heat warp
Heat transfer plate 300 with good heat transfer capacity is sent to lower floor's furnace chamber, for reduction reaction, realizes making full use of for heat.
, wherein it is desired to which explanation, in the starting stage of the reduction reaction of rotary hearth furnace lower floor furnace chamber 520, first starts heating part
The supply reduction reaction of part 525 institute calorific requirement, a large amount of heat transfers that reaction to be oxidized is released close one to reducing after chamber 523
Divide heater block 525, during normal operation, the heater block 525 of rotary hearth furnace is used as supplemental heat source.
According to embodiment of the present utility model, upper strata furnace chamber gas access 511 is located at surface or the neighbour of outlet member 527
The surface of nearly outlet member, and lower floor's furnace chamber gas vent 526 is located at the surface of cloth part 524 or the neighbouring charging
The surface of part.Thus, the flow direction of upper strata stove intracavity gas and the direction of rotation of ring-shaped furnace bottom are on the contrary, heat utilization rate is high.
According to embodiment of the present utility model, the height of upper strata furnace chamber 510 is not more than 30 centimetres.Thus, upper strata furnace chamber
Oxidation reaction heat release can be made full use of by the reduction reaction of lower floor's furnace chamber, and heat utilization efficiency is high.
According to embodiment of the present utility model, the height of lower floor's furnace chamber 520 is not more than 80 centimetres.Thus, lower floor furnace chamber
Oxidation reaction heat release can be preferably transferred on the pelletizing for being laid on furnace bottom, make full use of heat.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Heat-resisting pipeline 700, the heat-resisting pipeline 700 with
Lower floor's furnace chamber gas vent 526 is connected with upper strata furnace chamber gas access 511.Thus, it is to avoid high-temperature gas corrosion pipeline, pipeline
Service life is long.
According to embodiment of the present utility model, upper strata furnace chamber air intake and upper strata furnace chamber gas access 511 are at least
One, and upper strata furnace chamber air intake and upper strata furnace chamber gas access 511 correspond.According to some implementations of the present utility model
Example, each upper strata furnace chamber air intake is adjacent to upper strata furnace chamber gas access 511.Thus, phosphorus steam and CO is made to be filled with oxygen
Tap is touched, and is occurred oxidation reaction, is made the yield of phosphorus pentoxide higher.
According to embodiment of the present utility model, the opening of upper strata furnace chamber air intake through the top of toroidal shell 100 or
The side wall of upper strata furnace chamber 510 is simultaneously connected with branching air pipeline, and branching air pipeline perpendicular to the top of toroidal shell 100 or
The side wall of upper strata furnace chamber 510.Thus, it is easy to the gas in branching air pipeline in the top cross-sectional quilt of furnace roof housing
Send into the furnace chamber of upper strata.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Pneumatic shuttle (not shown), the air pressure
Device is connected with branching air pipeline, and power is provided for the gas conveying in branching air pipeline.
According to embodiment of the present utility model, the circular arc angle of reduction chamber 522 is not less than 200 degree.Thus, rotary hearth furnace
Reduction efficiency is high.
According to embodiment of the present utility model, heater block 525 is electric heating element and/or gas heating part.Thus,
Mode of heating is flexible, it is to avoid to heating the dependence to electricity.
According to embodiment of the present utility model, partition wall 530 can make reduction chamber 522 keep more preferable reducing atmosphere.
According to embodiment of the present utility model, the rotary hearth furnace further comprises：Transmission device 600, the transmission device 600 is set
Put below ring-shaped furnace bottom 200 and be connected with the ring-shaped furnace bottom 200, for driving ring-shaped furnace bottom to rotate.
The rotary hearth furnace of the utility model embodiment is mainly for the treatment of phosphorus ore to prepare phosphoric acid.In order to make it easy to understand, incite somebody to action this
The technological principle of the rotary hearth furnace processing phosphorus ore of utility model embodiment makes following elaboration：The rotary hearth furnace of the utility model embodiment
Processing raw material be containing phosphorus ore and reduction carbon pelletizing, pass through rotary hearth furnace be reduced directly Phosphate Rock acid new technology.Work
The small part carbon burning in P4, CO oxidation heat liberation, rotary hearth furnace heating devices heat and carbonaceous pelletizing of reaction production of the thermal source of skill
Three provides.Wherein, technique thermal source mostlys come from oxidation reaction heat release, and rotary hearth furnace heater block is as startup thermal source and normally
Supplemental heat source during operation is used.
After carbonaceous pelletizing is heated to reduction temperature, occur following reduction reactions in rotary hearth furnace lower floor burner hearth：
2Ca5(PO4)3F+15C+9SiO2→3/2P4+15CO+9(CaO·SiO2)+CaF2,
Δ H=28 006kJ/kg are (with P4Meter).(1)
The P that above-mentioned reaction is escaped4And CO, upper strata burner hearth is admitted to immediately occurs following oxidation reaction with air contact：
P4+5O2→2P2O5, Δ H=-25 498kJ/kg are (with P4Meter)；(2)
CO+1/2O2→CO2, Δ H=-22 154kJ/kg are (with P4Meter).(3)
Pass through 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 to be used for heating furnace charge, makes furnace charge
It is warming up to reaction temperature.The technical process be phosphorus ore, silica, coal three mix in proportion, ball processed, be placed in turn bottom after drying
Stove, completes the reduction and oxidation of phosphorus in same equipment, i.e.,：At high operating temperatures, the phosphorus in phosphorus ore is in rotary hearth furnace lower floor stove
Reduced in thorax by carbon, P4Escaped with vapor state.Produced P4Oxidation reaction is completed with CO feeding upper strata burner hearths, is released
Heat reached by the good heat transfer plate of heat transfer property in lower floor's burner hearth, phosphorus supply ore deposit needed for phosphorus 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 will for phosphorus ore of the present utility model
Plus more silica (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 utility model is except processing high-grade phosphorus ore, in can also handling, low product
Position phosphorus ore.
It should be noted that in, low-grade phosphate ore refer to P2O5Content is less than 25% phosphorus ore.
Below with reference to specific embodiment, the utility model is illustrated, it is necessary to which explanation is, these embodiments are only
It is illustrative, and it is not intended that to limitation of the present utility model.
Embodiment 1
Using the rotary hearth furnace of the utility model embodiment, phosphoric acid is prepared using phosphorus ore and semi-coke as raw material, specific method is as follows：
The levigate phosphorus ore for accounting for more than 50% to 200 mesh is well mixed according to a certain percentage with semi-coke, silica and binding agent
And use disc balling machine pelletizing, wherein P2O5Grade is 21.5%, and the addition of semi-coke is 1 times of theoretical requirement, silica addition
The 12% of phosphorus ore weight is measured, binding agent chooses sodium based raw material and bentonite, afterwards will system under the conditions of 100-200 DEG C with drying grate
The carbonaceous pelletizing obtained, which is dried to moisture, is less than 2%, and dried carbonaceous pelletizing is distributed into rotary hearth furnace lower floor furnace chamber and preheated, also
Original, 1300 DEG C of reduction temperature, the control of rotary hearth furnace rotating speed is in 55min/r, and the annulus angle of reduction chamber is 320 DEG C.After reduction
That arrives contains P4Upper strata furnace chamber is sent into by pipeline with CO gaseous state thing and carries out oxidation reaction, and big calorimetric is discharged with reaction,
Heat reaches lower floor's furnace chamber by heat transfer plate and recycled.Wherein, the position of lower floor's furnace chamber gas vent is arranged on reduction
In chamber and adjacent to the position of drawing mechanism, the position of upper strata furnace chamber gas access is arranged in the furnace chamber of upper strata, and neighbouring discharging
Gas flow direction is opposite with the direction of rotation of ring-shaped furnace bottom in the surface of device, upper strata furnace chamber.In reduction process, phosphorus
Percent reduction reaches 86%.The rotary hearth furnace furnace gas of discharge is directly entered hydrated tower, and P is absorbed by recycle acid2O5Industrial phosphoric acid, tail is made
Gas is emptied after electric cleaner.Feeding cement plant is secondary after the furnace charge of rotary hearth furnace discharge is collected utilizes.
Embodiment 2
Using the rotary hearth furnace of the utility model embodiment, phosphoric acid is prepared using phosphorus ore and semi-coke as raw material, specific method is as follows：
- 2mm will be crushed to account for more than 75% phosphorus ore and be well mixed according to a certain percentage simultaneously with lignite, silica and binding agent
Use ball press pressure ball, wherein P2O5Grade is 28%, and the addition of lignite is 1.3 times of theoretical requirement, silica addition phosphorus ore
The 2% of weight, binding agent uses liquid-containing binder, and the pelletizing of compacting, which is dried to moisture~4%, is distributed into rotary hearth furnace lower floor furnace chamber
Preheated, reduced, 1380 DEG C of reduction temperature, the control of rotary hearth furnace rotating speed is in 65min/r, and the annulus angle of reduction chamber is 270
℃.What is obtained after reduction contains P4Upper strata furnace chamber is sent into by pipeline with CO gaseous state thing and carries out oxidation reaction, with reaction release
Go out big calorimetric, heat reaches lower floor's furnace chamber by heat transfer plate and utilized.Wherein, the position of lower floor's furnace chamber gas vent is arranged on
Reduce in chamber and adjacent to the position of drawing mechanism, the position of upper strata furnace chamber gas access is arranged in the furnace chamber of upper strata, and is located at
Gas flow direction is opposite with the direction of rotation of ring-shaped furnace bottom in the surface of drawing mechanism, upper strata furnace chamber.In reduction process,
The percent reduction of phosphorus reaches 90%.It is made after phosphoric acid, tail gas removing dust and empties after the rotary hearth furnace air water of discharge.Rotary hearth furnace is discharged
Furnace charge collect after feeding cement plant it is secondary utilize.
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 the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle of the present utility model and objective, replaced
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (10)
1. a kind of rotary hearth furnace, it is characterised in that including：
Toroidal shell；
Rotatable ring-shaped furnace bottom, the ring-shaped furnace bottom is arranged in the toroidal shell, and is limited jointly with the toroidal shell
Make furnace chamber space；
Heat transfer plate, the heat transfer plate is arranged in the furnace chamber space, and the furnace chamber space is divided into upper strata furnace chamber with
Lower floor's furnace chamber, the charging chamber of bottom connection, reduction are divided into using partition wall by layer furnace chamber successively along Flow of Goods and Materials direction
Chamber and discharge chamber, wherein, the charging chamber has cloth part, and the cloth part is prolonged upwards by the charging chamber
Extend outside the toroidal shell, the reduction chamber has heater block, and the discharge chamber has outlet member；
Air duct, the air duct is arranged on the outside in the furnace chamber space, and the air duct has multiple branches empty
Air pipe；
Lower floor's furnace chamber gas vent, lower floor's furnace chamber gas vent is located on the side wall of reduction chamber；
Upper strata furnace chamber gas access, the upper strata furnace chamber gas access is located on the side wall of upper strata furnace chamber or the toroidal shell
Top, the upper strata furnace chamber gas access is connected with lower floor's furnace chamber gas vent；
Upper strata furnace chamber air intake, the upper strata furnace chamber air intake is located on the side wall of upper strata furnace chamber or the toroidal shell
Top, and be connected with the branching air pipeline；And
Upper strata furnace chamber gas vent, the upper strata furnace chamber gas vent is located on the side wall of upper strata furnace chamber.
2. rotary hearth furnace according to claim 1, it is characterised in that the upper strata furnace chamber gas access is located at the discharging portion
The surface of part or the surface of neighbouring outlet member, and lower floor's furnace chamber gas vent be located at the cloth part just on
Side or the surface of the neighbouring cloth part.
3. rotary hearth furnace according to claim 1, it is characterised in that the height of the upper strata furnace chamber is not more than 30 centimetres.
4. rotary hearth furnace according to claim 1, it is characterised in that the height of lower floor's furnace chamber is not more than 80 centimetres.
5. rotary hearth furnace according to claim 1, it is characterised in that further comprise：
Heat-resisting pipeline, the heat-resisting pipeline is connected with lower floor's furnace chamber gas vent and the upper strata furnace chamber gas access.
6. rotary hearth furnace according to claim 1, it is characterised in that the upper strata furnace chamber air intake and the upper strata furnace chamber
Gas access is at least one, and the upper strata furnace chamber air intake and the upper strata furnace chamber gas access are corresponded.
7. rotary hearth furnace according to claim 1, it is characterised in that the opening of the upper strata furnace chamber air intake is through described
The top of toroidal shell or the side wall of upper strata furnace chamber are simultaneously connected, and the branching air pipeline is vertical with the branching air pipeline
In the top of the toroidal shell or the side wall of upper strata furnace chamber.
8. rotary hearth furnace according to claim 1, it is characterised in that further comprise：
Pneumatic shuttle, the pneumatic shuttle is connected with the branching air pipeline.
9. rotary hearth furnace according to claim 1, it is characterised in that the circular arc angle of the reduction chamber is not less than 200 degree.
10. the rotary hearth furnace according to claim any one of 1-9, it is characterised in that the heater block is electric heating element
And/or gas heating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415411.8U CN206384844U (en) | 2016-12-21 | 2016-12-21 | Rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621415411.8U CN206384844U (en) | 2016-12-21 | 2016-12-21 | Rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206384844U true CN206384844U (en) | 2017-08-08 |
Family
ID=59489662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621415411.8U Expired - Fee Related CN206384844U (en) | 2016-12-21 | 2016-12-21 | Rotary hearth furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206384844U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495116A (en) * | 2016-12-21 | 2017-03-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace |
| US11858811B2 (en) | 2019-06-30 | 2024-01-02 | Novaphos Inc. | Phosphorus production methods and systems and methods for producing a reduction product |
-
2016
- 2016-12-21 CN CN201621415411.8U patent/CN206384844U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495116A (en) * | 2016-12-21 | 2017-03-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace |
| US11858811B2 (en) | 2019-06-30 | 2024-01-02 | Novaphos Inc. | Phosphorus production methods and systems and methods for producing a reduction product |
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