CN207738829U - A kind of processing system of sintering dust - Google Patents
A kind of processing system of sintering dust Download PDFInfo
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- CN207738829U CN207738829U CN201721653485.XU CN201721653485U CN207738829U CN 207738829 U CN207738829 U CN 207738829U CN 201721653485 U CN201721653485 U CN 201721653485U CN 207738829 U CN207738829 U CN 207738829U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model is related to a kind of processing systems of sintering dust, including：Mixing device, palletizing device, drying unit, calciner, reduction apparatus, ball-milling device and concentration equipment, wherein palletizing device is connected with the mixing device, by the sintering dust mixed in mixing device and calcium chloride pelletizing, obtains mixing pelletizing；Drying unit is connected with the palletizing device, by mixing pelletizing drying, obtains mixing dry bulb group；The calciner is connected with the drying unit, and the mixing dry bulb is rolled into a ball chloridising roasting, obtains de- potash bulb group and thick potassium chloride powder；The reduction apparatus is connected with the calciner, and the de- potash bulb group is restored, metallized pellet is obtained；The ball-milling device is connected with the reduction apparatus；The concentration equipment is connected with the ball-milling device, for the metallized pellet after ball milling to be carried out magnetic separation, obtains Iron concentrate.Realize potassium in sintering dust, iron substep recycles, high-efficiency environment friendly and flow is simple to operation.
Description
Technical field
The utility model belongs to metallurgy industry solid waste field, and in particular to a kind of processing system of sintering dust.
Background technology
Its yield of sintering dust accounts for about the 2% ~ 4% of Sintering Yield, the annual thus generated sintering dust thousand in the whole nation
Ten thousand tons.Country's utilization ways are mainly the mode of directly supplying sintering feed reuse to realize at present.Not due to iron ore source
Together, compound is formed by because of boiling point containing alkali metal elements, these alkali metal elements such as higher K in the ore raw materials of part
It is low, it is directly evaporated into flue gas in high-temperature sintering process, or be restored by coke into corresponding elemental metals gas and escape, and
It condenses, aoxidize in electric dust removing system, then be captured into dedusting ash.The multiple direct dispensing again of sintering ash is recycled back to
With the alkali metal elements such as K are gradually enriched with, and sintering dust and sinter is made to contain the alkali metal elements such as higher K, significantly affect burning
The efficiency of dust collection and operational stability for tying electric precipitator cause the dust concentration of electric precipitation discharge flue gas exceeded and device operation energy
Consumption increases, and the sinter of the alkali metal elements such as high-content K, which enters blast furnace, will corrode furnace lining, influences prolonging campaign operation, and be sintered
K element is not recycled and wastes in dust.Therefore, the sintering dust of exploitation efficiently, economical and environmentally friendly handles new technology, has become
For the important problem of domestic iron and steel enterprises production.
Utility model content
The utility model is in view of the deficiencies of the prior art, it is proposed that a kind of processing system of sintering dust realizes sintering
Potassium in dust, iron substep recycle, high-efficiency environment friendly and flow is simple to operation.
In order to solve the above technical problems, the utility model proposes a kind of processing systems of sintering dust, including：Batch mixing fills
Set, palletizing device, drying unit, calciner, reduction apparatus, ball-milling device and concentration equipment, wherein the palletizing device with
The mixing device is connected, and by the sintering dust mixed in the mixing device and calcium chloride pelletizing, obtains mixing pelletizing；Institute
It states drying unit with the palletizing device to be connected, the mixing pelletizing is dried, obtain mixing dry bulb group；The calciner with
The drying unit is connected, and the mixing dry bulb is rolled into a ball chloridising roasting, obtains de- potash bulb group and thick potassium chloride powder；It is described also original-pack
It sets and is connected with the calciner, the de- potash bulb group is restored, metallized pellet is obtained；The ball-milling device with it is described
Reduction apparatus is connected；The concentration equipment is connected with the ball-milling device, for the metallized pellet after ball milling to be carried out magnetic separation,
Obtain Iron concentrate.
Further, the mixing device includes：Feeding mouth and mixture outlet.
Further, the palletizing device includes：Mixture entrance and pelletizing outlet, the mixture entrance are mixed with described
Material outlet is closed to be connected.
Further, the drying unit includes：Pelletizing entrance and the outlet of dry bulb group, the pelletizing entrance and the pelletizing
Outlet is connected.
Further, the calciner includes：Dry bulb group's entrance, the outlet of de- potash bulb group, protection gas entrance and flue gas go out
Mouthful, wherein dry bulb group's entrance is exported with dry bulb group to be connected, and dust-extraction unit is equipped in the exhanst gas outlet, for receiving
Collect the potassium chloride in flue gas.
Further, the reduction apparatus includes：De- potash bulb group entrance, reduction coal entrance and direct reduced iron outlet,
In, de- potash bulb group's entrance is connected with the de- potash bulb group outlet.
Further, the ball-milling device includes：Direct reduced iron entrance and powder outlet, the direct reduced iron entrance
It is connected with direct reduced iron outlet.
Further, the concentration equipment includes：Powder entrance is connected with the powder outlet.
The beneficial effects of the utility model are：A kind of processing system of sintering dust described in the utility model, realizes
It is sintered potassium in dust, iron substep recycling, has the characteristics that efficient, economic and environment-friendly and flow is simple to operation.
Description of the drawings
Fig. 1 is the process flow chart of the utility model.
Fig. 2 is Tthe utility model system structural schematic diagram.
Specific implementation mode
In order to enable those skilled in the art to better understand the technical solutions of the present invention, with reference to specific embodiment
The utility model is described in further detail.The embodiments described below is exemplary, and is only used for explaining that this practicality is new
Type, and should not be understood as limiting the present invention.Particular technique or condition are not specified in embodiment, according in the art
Document described in technology or condition or carried out according to product description.
Embodiment according to the present utility model, Fig. 2 is Tthe utility model system structural schematic diagram, with reference to shown in Fig. 2, this reality
Include with the novel processing system for being sintered dust：It is mixing device, palletizing device, drying unit, calciner, also original-pack
It sets, ball-milling device and concentration equipment.
Embodiment according to the present utility model, with reference to shown in Fig. 2, mixing device described in the utility model includes：Feeding mouth
It is exported with mixture, sintering dust is added into the mixing device by the feeding mouth and calcium chloride carries out batch mixing, then is led to
Cross mixture outlet discharge.
Some embodiments according to the present utility model, sintering dust potassium content 5-20% described in the utility model, iron content
20-50%。
Embodiment according to the present utility model, with reference to shown in Fig. 2, palletizing device described in the utility model includes：Mixture
Entrance and pelletizing outlet, the mixture entrance are connected with the outlet of the mixture of the mixing device, are used for pelletizing, are mixed
Pelletizing.
Some embodiments according to the present utility model, mixing pellet size described in the utility model are 8-16mm.
Embodiment according to the present utility model, with reference to shown in Fig. 2, drying unit described in the utility model includes：Pelletizing enters
Mouth and the outlet of dry bulb group, the pelletizing entrance are connected with pelletizing outlet, and the mixing pelletizing drying of the palletizing device obtains
To mixing dry bulb group；Wherein, drying temperature is 100-200 DEG C, drying time 10-30min.
Embodiment according to the present utility model, with reference to shown in Fig. 2, calciner described in the utility model includes：Dry bulb group
Entrance, the outlet of de- potash bulb group, protection gas entrance and exhanst gas outlet, wherein dry bulb group's entrance is dry with the drying unit
Pelletizing outlet is connected, and the mixing dry bulb is rolled into a ball chloridising roasting, obtains de- potash bulb group and flue gas；It is more according to the present utility model
Embodiment is equipped with dust-extraction unit, for collecting the thick potassium chloride powder in flue gas in the exhanst gas outlet.
Some embodiments according to the present utility model, the protection gas entrance are passed through protective gas, and the utility model is excellent
It is selected as nitrogen；In the calciner, calcination temperature is 800-1100 DEG C, roasting time 10-40min.
Embodiment according to the present utility model, with reference to shown in Fig. 2, reduction apparatus described in the utility model includes：De- potash bulb
Group's entrance, reduction coal entrance and direct reduced iron outlet, wherein the de- potash bulb of de- potash bulb the group entrance and the calciner
Group outlet is connected, and the de- potash bulb group is passed through the reduction apparatus and is restored with reduction coal, obtains metallized pellet.
Some embodiments according to the present utility model, the de- potash bulb group and reduction coal mass ratio are 1:0.15-0.30, also
Former temperature is 1100-1300 DEG C, recovery time 20-60min.
Embodiment according to the present utility model, with reference to shown in Fig. 2, ball-milling device described in the utility model includes：Directly also
Former iron entrance and powder outlet, the direct reduced iron entrance are connected with the outlet of the direct reduced iron of the reduction apparatus；It is described
Concentration equipment includes：Powder entrance is connected with the powder outlet of the ball-milling device, and the metallized pellet passes through described successively
Ball-milling device and concentration equipment carry out ball milling and magnetic separation, obtain Iron concentrate.
Some embodiments according to the present utility model, 200 85% or more mesh of ball milling granularity, magnetic separation strength 800-1500Oe.
Embodiment according to the present utility model, Fig. 1 is the process flow chart of the utility model, in the another of the utility model
Aspect, it is proposed that a method of sintering dust being handled using foregoing system, it is shown referring to Fig.1, include the following steps：
（1）Sintering dust is passed through mixing pelletizing in mixing device and palletizing device with calcium chloride successively in proportion, is obtained
Mix pelletizing.
Some embodiments according to the present utility model, sintering dust potassium content 5-20% described in the utility model, iron content
20-50%；The mass ratio of the sintering dust and calcium chloride is 1:0.05-0.20, mixing pellet size are 8-16mm.
（2）The mixing pelletizing is passed through calciner after drying unit drying and carries out chloridising roasting, while being passed through nitrogen,
De- potash bulb group and flue gas are obtained, the thick potassium chloride powder in flue gas is collected by dust-extraction unit.
The drying temperature of some embodiments according to the present utility model, the drying unit is 100-200 DEG C, drying time
For 10-30min, the calcination temperature in calciner is 800-1100 DEG C, roasting time 10-40min.
（3）The de- potash bulb group is passed through reduction apparatus and is restored with reduction coal, obtains metallized pellet.
Some embodiments according to the present utility model, carbon content is higher than 80% in the reduction coal, granularity 5-15mm；Institute
It is 1 that de- potash bulb group, which is stated, with reduction coal mass ratio:0.15-0.30, reduction temperature are 1100-1300 DEG C, recovery time 20-
60min。
（4）The metallized pellet carries out ball milling magnetic separation through ball-milling device and concentration equipment successively, obtains Iron concentrate.
Some embodiments according to the present utility model, 200 85% or more mesh of ball milling granularity, magnetic separation strength 800-1500Oe.
Some embodiments according to the present utility model, the principle of method described in the utility model are：Contain in sintering dust
A large amount of potassium element and ferro element are sintered potassium element in dust and are formed by compound because of low boiling point, especially KCl, roasting
It can directly evaporate into flue gas in the process, can more promote the progress of this volatilization, and calcium constituent energy with addition of the Cl elements in calcium chloride
Promote the de- potash bulb of follow-up oxides-containing iron to roll into a ball reduction, the thick potassium chloride in flue gas is collected by dust-extraction unit, as producing potassium
The raw material of fertilizer, de- potash bulb group are reduced into metallized pellet with addition of reduction coal, Iron concentrate are obtained by ball milling and magnetic separation.
Embodiment one：
Certain sintering dust（TFe:25.8%, K:6.2%, 200 mesh 88.2% of granularity）With calcium chloride according to mass ratio 1:0.06
Mixing pelletizing obtains mixing pelletizing（Grain size is 8-12mm）, mix pelletizing and be passed through after 120 DEG C of drying 25min of drying unit
In 850 DEG C of roasting temperature 35min in calciner containing nitrogen, collects exhaust gas dust and obtain thick potassium chloride, acquisition takes off
Potash bulb group and reduction coal（C:81.4%, granularity 5-8mm）According to 1:0.18 ratio enters reduction apparatus, is restored at 1150 DEG C
45min, the metallized pellet obtained after reduction are milled to 200 mesh 86.7%, obtain 90.3 %'s of TFe through field strength 1000Oe magnetic separation
Iron concentrate.
Embodiment two：
Certain sintering dust（TFe:34.7%, K:10.3%, 200 mesh 91.3% of granularity）With calcium chloride according to mass ratio 1:
0.10 mixing pelletizing obtains mixing pelletizing（Grain size 10-14mm）, mixing pelletizing is logical after 150 DEG C of drying 20min of drying unit
Enter 950 DEG C of roasting 30min in the calciner containing nitrogen, collects exhaust gas dust and obtain thick potassium chloride, the de- potash bulb group of acquisition
With reduction coal（C:81.4%, granularity 5-8mm）According to 1:0.22 ratio enters reduction apparatus, 35min is restored at 1200 DEG C, also
The metallized pellet obtained after original is milled to 200 mesh 83.5%, and the Iron concentrate of 88.5 % of TFe is obtained through field strength 1200Oe magnetic separation.
Embodiment three：
Certain sintering dust（TFe:42.6%, K:15.8%, 200 mesh 90.7% of granularity）With calcium chloride according to mass ratio 1:
0.15 mixing pelletizing obtains mixing pelletizing（Grain size 8-12mm）, mixing pelletizing is logical after 180 DEG C of drying 15min of drying unit
Enter 1050 DEG C of roasting 25min in the calciner containing nitrogen, collects exhaust gas dust and obtain thick potassium chloride, the de- potash bulb group of acquisition
With reduction coal（C:81.4%, granularity 5-8mm）According to 1:0.28 ratio enters reduction apparatus, in 1250 DEG C of reductase 12 5min, also
The metallized pellet obtained after original is milled to 200 mesh 88.6%, and the Iron concentrate of 85.6 % of TFe is obtained through field strength 1400Oe magnetic separation.
Inventor has found, according to a kind of processing system of sintering dust described in the utility model, realizes sintering dust
Middle potassium, iron substep recycle, and have the characteristics that efficient, economic and environment-friendly and flow is simple to operation.
In the present invention unless specifically defined or limited otherwise, the terms such as term " connected ", " connection " should be done extensively
Reason and good sense solution may be a detachable connection for example, it may be being fixedly connected, or integral；Can be mechanical connection, it can also
It is electrical connection；Can be directly connected, can also indirectly connected through an intermediary, can be connection inside two elements or
The interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Identical embodiment or example need not be directed to by stating.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiments or example.In addition, without conflicting with each other, this field
Technical staff can carry out the feature of different embodiments or examples described in this specification and different embodiments or examples
In conjunction with and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments, meanwhile, for those of ordinary skill in the art, foundation
The thought of the application, there will be changes in the specific implementation manner and application range.
Claims (8)
1. a kind of processing system of sintering dust, including：It is mixing device, palletizing device, drying unit, calciner, also original-pack
It sets, ball-milling device and concentration equipment, which is characterized in that wherein,
The palletizing device is connected with the mixing device, and the sintering dust and the calcium chloride that are mixed in the mixing device are made
Ball obtains mixing pelletizing；
The drying unit is connected with the palletizing device, and the mixing pelletizing is dried, and obtains mixing dry bulb group；
The calciner is connected with the drying unit, and the mixing dry bulb is rolled into a ball chloridising roasting, obtains de- potash bulb group and thick
Potassium chloride powder；
The reduction apparatus is connected with the calciner, and the de- potash bulb group is restored, metallized pellet is obtained；
The ball-milling device is connected with the reduction apparatus；
The concentration equipment is connected with the ball-milling device, for the metallized pellet after ball milling to be carried out magnetic separation, obtains iron essence
Powder.
2. a kind of processing system of sintering dust according to claim 1, which is characterized in that the mixing device includes：
Feeding mouth and mixture outlet.
3. a kind of processing system of sintering dust according to claim 2, which is characterized in that the palletizing device includes：
Mixture entrance and pelletizing outlet, the mixture entrance are connected with mixture outlet.
4. a kind of processing system of sintering dust according to claim 3, which is characterized in that the drying unit includes：
Pelletizing entrance and the outlet of dry bulb group, the pelletizing entrance are connected with pelletizing outlet.
5. a kind of processing system of sintering dust according to claim 4, which is characterized in that the calciner includes：
Dry bulb group's entrance, the outlet of de- potash bulb group, protection gas entrance and exhanst gas outlet, wherein dry bulb group's entrance and the dry bulb group
Outlet is connected, and dust-extraction unit is equipped in the exhanst gas outlet, for collecting the potassium chloride in flue gas.
6. a kind of processing system of sintering dust according to claim 5, which is characterized in that the reduction apparatus includes：
De- potash bulb group entrance, reduction coal entrance and direct reduced iron outlet, wherein the de- potash bulb group entrance goes out with the de- potash bulb group
Mouth is connected.
7. a kind of processing system of sintering dust according to claim 6, which is characterized in that the ball-milling device includes：
Direct reduced iron entrance and powder outlet, the direct reduced iron entrance are connected with direct reduced iron outlet.
8. a kind of processing system of sintering dust according to claim 7, which is characterized in that the concentration equipment includes：
Powder entrance is connected with the powder outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721653485.XU CN207738829U (en) | 2017-12-01 | 2017-12-01 | A kind of processing system of sintering dust |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721653485.XU CN207738829U (en) | 2017-12-01 | 2017-12-01 | A kind of processing system of sintering dust |
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| Publication Number | Publication Date |
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| CN207738829U true CN207738829U (en) | 2018-08-17 |
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| CN201721653485.XU Expired - Fee Related CN207738829U (en) | 2017-12-01 | 2017-12-01 | A kind of processing system of sintering dust |
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2017
- 2017-12-01 CN CN201721653485.XU patent/CN207738829U/en not_active Expired - Fee Related
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