CN206721295U - A kind of sintering system of chromite powder - Google Patents
A kind of sintering system of chromite powder Download PDFInfo
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- CN206721295U CN206721295U CN201720408750.1U CN201720408750U CN206721295U CN 206721295 U CN206721295 U CN 206721295U CN 201720408750 U CN201720408750 U CN 201720408750U CN 206721295 U CN206721295 U CN 206721295U
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- sintering
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Abstract
The utility model provides a kind of sintering system of chromite powder.The system includes：Mixing device, including feed(raw material)inlet and compound outlet；Briquetting device, including compound entrance and lump outlet, compound entrance are connected with the compound outlet of mixing device；Wrap up in powder device, including agglomerate entrance, coke powder entrance and wrap up in powder lump outlet, agglomerate entrance is connected with the lump outlet of briquetting device；Sintering equipment, including powder ball block entrance, sintering lump outlet and igniter burner are wrapped up in, wrap up in powder ball block entrance and be connected with wrapping up in the powder lump outlet of wrapping up in of powder device, igniter burner is located in sintering equipment；Sintering equipment is annular, and igniter burner forms preheating and drying area with wrapping up in powder ball block entrance, and igniter burner forms sintering zone with sintering lump outlet.Technique provided by the utility model is simple, and energy consumption is small, and cost is low, and obtained chromite sintering clumps quality is good.
Description
Technical field
The utility model belongs to ferroalloy smelting technical field, in particular it relates to a kind of sintering system of chromite powder.
Background technology
If directly with ferrochrome fine ore electric furnace gas permeability can be made to be deteriorated during ferrochrome smelting, deteriorate the working of a furnace, increase energy consumption, be unfavorable for
The safe operation of electric furnace, thus chromite powder must be pre-processed.Chromite powder pretreatment main at present has sintering process
With pellet roasting method.
The raw material of sintering process does not need fine grinding processing, and gained chromite sintered products are loose porous, and surface area is big, reactivity
Can be good, technics comparing is ripe；But because chromite fusing point is high, hardly possible forms the liquid phase of low melting point, chromite powder fine size, deteriorates material
The gas permeability of layer so that sintering process yields poorly, and the rate of return mine is high, the shortcomings that high energy consumption.
Existing pellet roasting method is by chromite powder and coal dust (or coke powder) drying, mixed grinding, batch mixing and then additional
Bentonite and water pelletizing, are finally dried and are calcined and reduced (oxidation) pelletizing, but require chromite powder being ground to grain
Mass fraction 80% of the degree less than 0.074mm, technique need large-scale milling apparatus, and energy consumption is big, and technological process is complicated, and investment is larger.
Utility model content
In view of the shortcomings of the prior art, the utility model aims to provide that a kind of technological process is simple, energy consumption is low, sintering effect
The sintering system of good chromite powder.
The sintering system of chromite powder provided by the utility model, including：
Mixing device, including feed(raw material)inlet and compound outlet；
Briquetting device, including compound entrance and lump outlet, the mixing of the compound entrance and the mixing device
Material outlet is connected；
Wrap up in powder device, including agglomerate entrance, coke powder entrance and wrap up in powder lump outlet, the agglomerate entrance fills with the briquetting
The lump outlet put is connected；
Sintering equipment, including powder ball block entrance, sintering lump outlet and igniter burner are wrapped up in, it is described to wrap up in powder ball block entrance and institute
State and wrap up in the powder lump outlet of wrapping up in of powder device and be connected, the igniter burner is located in the sintering equipment；
The sintering equipment is annular, and the igniter burner forms preheating and drying area with the powder ball block entrance of wrapping up in, described
Igniter burner forms sintering zone with the sintering lump outlet.
Preferably, the sintering equipment also includes hot exhaust gas entrance and hot exhaust gas exports, and the hot exhaust gas entrance is located at institute
The top in preheating and drying area is stated, the hot exhaust gas outlet is positioned at the bottom of the sintering zone, the hot exhaust gas entrance and the heat
Offgas outlet is connected.
Preferably, it is described wrap up in powder ball block entrance and it is described sintering lump outlet between sector region radian for 10 °~
30°。
Preferably, the radian in the preheating and drying area is 50 °~100 °.
Preferably, the radian of the sintering zone is 200 °~250 °.
The utility model will sinter in sintering equipment after chromite powder dispensing briquetting and obtain prereduction, take full advantage of
Waste heat from tail gas is sintered, energy consumption is small, and cost is low.
It is low to the granularity requirements of chromite powder in the utility model, it is not necessary to be milled to very carefully, saved energy consumption and place
Manage the time.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the sintering system of chromite powder in the utility model embodiment.
Fig. 2 is the connection relationship diagram of preheating and drying area and sintering zone in the system shown in Fig. 1.
Embodiment
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when scheme of the present utility model and its various aspects.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than to limitation of the present utility model.
Fig. 1 show a kind of structural representation of the sintering system of chromite powder provided by the utility model, including batch mixing
Device 1, briquetting device 2, wrap up in powder device 3 and sintering equipment 4.
The utility model will sinter in sintering equipment after chromite powder dispensing briquetting and obtain prereduction, and energy consumption is small, into
This is low.
Mixing device 1 is used to mix chromite powder, lime stone, silica and coke powder.Mixing device 1 includes feed(raw material)inlet and mixed
Close material outlet.
Briquetting device 2 is used to compound being pressed into agglomerate.Briquetting device 2 includes compound entrance and lump outlet, mixes
Material entrance is closed with the compound outlet of mixing device 1 to be connected.
Powder device 3 is wrapped up in be used to uniformly wrap a coke charge powder in pellet surface.Powder device 3 is wrapped up in including agglomerate entrance, coke powder to enter
Mouthful and wrap up in powder lump outlet, agglomerate entrance is connected with the lump outlet of briquetting device 2.
Sintering equipment 4 sinters chromite sintering agglomerate into for that will wrap up in powder ball block.Sintering equipment 4 includes wrapping up in powder ball block entrance
402nd, lump outlet 403 and igniter burner 401 are sintered, powder ball block entrance 402 is wrapped up in and wraps up in powder lump outlet phase with wrap up in powder device 3
Even, igniter burner 401 is located in sintering equipment 4；Sintering equipment 4 is annular, and igniter burner 401 is with wrapping up in the shape of powder ball block entrance 402
Into preheating and drying area A, igniter burner 401 forms sintering zone B with sintering lump outlet 403.
As depicted in figs. 1 and 2, sintering equipment 4 also includes hot exhaust gas entrance 405 and hot exhaust gas outlet 404, hot exhaust gas entrance
405 are located at preheating and drying area A top, and hot exhaust gas outlet 404 is located at sintering zone B bottom.Hot exhaust gas entrance 405 and hot exhaust gas
Outlet 404 is connected.By being passed through at the top of preheating and drying area A, preheating becomes the hot exhaust gas that sintering zone B bottoms are extracted after wrapping up in powder ball block
Discharged into cold tail gas, and from preheating and drying area A bottom, take full advantage of sintering waste heat from tail gas, reduce cost.Obviously, hot tail
Gas can also be not used in preheating and wrap up in powder ball block, otherwise utilized, or be expelled directly out system after processing.
Preheating and drying area A radian is bigger, and it is longer to wrap up in the preheating time of powder ball block, in the utility model preferred embodiment
In, preheating and drying area A radian is 50 °~100 °.Sintering zone B radian is bigger, wrap up in powder ball block sintering time it is longer, preheating
Time is shorter, and in the utility model preferred embodiment, sintering zone B radian is 200 °~250 °.Correspondingly, powder ball block is wrapped up in
The radian of sector region between entrance 402 and sintering lump outlet 403 is preferably 10 °~30 °.
Dotted arrow shown in Fig. 1 represents the direction of motion of material in sintering equipment 4.Wrap up in powder ball block and enter from powder ball block is wrapped up in
Mouth 402 enters sintering equipment 4, is preheated first by hot exhaust gas in preheating and drying area A, then enters back into sintering zone B and be sintered,
Chromite sintering agglomerate is made, goes out system from sintering lump outlet 403, energy consumption is small, and cost is low, obtained sintering clumps quality
It is good.
Below with reference to specific embodiment, the utility model is illustrated.Institute's taking technique condition value in following embodiments
It is exemplary, its desirable number range is as shown in foregoing utility model content.Detection method used in following embodiments
It is the conventional detection method of the industry.
Embodiment 1
Chromite sintering agglomerate is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite, lime stone, silica and coke powder, be crushed to below 1mm respectively.Cr in chromite used2O3Matter
Amount percentage composition is 42.5%, Cr2O3/ FeO=2.4；CaCO in lime stone3Weight/mass percentage composition be 92.3%, in silica
SiO2Weight/mass percentage composition be 97.5%, C weight/mass percentage composition is 81.5% in coke powder.
Mass ratio according to chromite powder, lime stone, silica, coke powder is 1:0.05:0.05:0.05 ratio is in mixing device
1 mix after in briquetting device 2 briquetting, agglomerate particle size 20mm.
Mass ratio according to agglomerate, coke powder is 1:0.01 ratio, pellet surface is wrapped up in into a coke charge powder in powder device 3 is wrapped up in,
Powder ball block is wrapped up in acquisition.
Powder ball block will be wrapped up in be sent into sintering equipment 4, powder ball block is wrapped up in and dried in preheating and drying area A, then burnt in sintering zone B
Form chromite sintering agglomerate.The height of the bed of material is 400mm in sintering equipment 4.The firing temperature of sintering is 1000 DEG C.
The drum strength of chromite sintering agglomerate is 85.36%, and reduction swellability rate is 6.82%, reduction and pulverization ratio RDI+3.15
More than 93%.
Embodiment 2
Chromite sintering agglomerate is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite, lime stone, silica and coke powder, be crushed to below 1mm respectively.Cr in chromite used2O3Matter
Amount percentage composition is 41.5%, Cr2O3/ FeO=2.3；CaCO in lime stone3Weight/mass percentage composition be 91.5%, in silica
SiO2Weight/mass percentage composition be 93.2%, C weight/mass percentage composition is 82.4% in coke powder.
Mass ratio according to chromite powder, lime stone, silica, coke powder is 1:0.15:0.1:0.08 ratio is in mixing device 1
After mixing in briquetting device 2 briquetting, agglomerate particle size 30mm.
Mass ratio according to agglomerate, coke powder is 1:0.02 ratio, pellet surface is wrapped up in into a coke charge powder in powder device 3 is wrapped up in,
Powder ball block is wrapped up in acquisition.
Powder ball block will be wrapped up in be sent into sintering equipment 4, powder ball block is wrapped up in and dried in preheating and drying area A, then burnt in sintering zone B
Form chromite sintering agglomerate.The height of the bed of material is 500mm in sintering equipment 4.The firing temperature of sintering is 1300 DEG C.
The drum strength of chromite sintering agglomerate is 85.06%, and reduction swellability rate is 7.12%, reduction and pulverization ratio RDI+3.15
More than 92%.
Embodiment 3
Chromite sintering agglomerate is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite, lime stone, silica and coke powder, be crushed to below 1mm respectively.Cr in chromite used2O3Matter
Amount percentage composition is 45.8%, Cr2O3/ FeO=2.5；CaCO in lime stone3Weight/mass percentage composition be 92.6%, in silica
SiO2Weight/mass percentage composition be 91.8%, C weight/mass percentage composition is 83.5% in coke powder.
Mass ratio according to chromite powder, lime stone, silica, coke powder is 1:0.1:0.15:0.10 ratio is in mixing device 1
After mixing in briquetting device 2 briquetting, agglomerate particle size 50mm.
Mass ratio according to agglomerate, coke powder is 1:0.02 ratio, pellet surface is wrapped up in into a coke charge powder in powder device 3 is wrapped up in,
Powder ball block is wrapped up in acquisition.
Powder ball block will be wrapped up in be sent into sintering equipment 4, powder ball block is wrapped up in and dried in preheating and drying area A, then burnt in sintering zone B
Form chromite sintering agglomerate.The height of the bed of material is 600mm in sintering equipment 4.The firing temperature of sintering is 1200 DEG C.
The drum strength of chromite sintering agglomerate is 84.18%, and reduction swellability rate is 7.79%, reduction and pulverization ratio RDI+3.15
More than 90%.
It was found from above-described embodiment, technique of the present utility model is simple, and energy consumption is small, and cost is low, obtained chromite sintering
Clumps quality is good.
To sum up, the utility model provides sintering liquid phase using lime stone and silica, consolidates chromite pelletizing, sinter strength
It is high；Sintering process lime stone discharges CO2Loose porous sintering deposit is formed, lime stone and silica collective effect promote coke powder to go back in advance
Former chromite, sintering deposit is Well-recovered, reduces follow-up mine heat furnace smelting difficulty.
Obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and not to embodiment party
The restriction of formula.For those of ordinary skill in the field, other differences can also be made on the basis of the above description
The change or variation of form.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out aobvious and
Among the change or variation being clear to are still in the scope of protection of the utility model.
Claims (5)
- A kind of 1. sintering system of chromite powder, it is characterised in that including：Mixing device, including feed(raw material)inlet and compound outlet；Briquetting device, including compound entrance and lump outlet, the compound of the compound entrance and the mixing device go out Mouth is connected；Wrap up in powder device, including agglomerate entrance, coke powder entrance and wrap up in powder lump outlet, the agglomerate entrance and the briquetting device Lump outlet is connected；Sintering equipment, including wrap up in powder ball block entrance, sintering lump outlet and igniter burner, the powder ball block entrance of wrapping up in and wrapped up in described The powder lump outlet of wrapping up in of powder device is connected, and the igniter burner is located in the sintering equipment；The sintering equipment is annular, and the igniter burner forms preheating and drying area, the igniting with the powder ball block entrance of wrapping up in Burner forms sintering zone with the sintering lump outlet.
- 2. sintering system according to claim 1, it is characterised in that the sintering equipment also includes hot exhaust gas entrance and heat Offgas outlet, the hot exhaust gas entrance are located at the top in the preheating and drying area, and the hot exhaust gas outlet is located at the sintering zone Bottom, the outlet of the hot exhaust gas entrance and the hot exhaust gas is connected.
- 3. sintering system according to claim 1, it is characterised in that the powder ball block entrance of wrapping up in goes out with the sintering agglomerate The radian of sector region between mouthful is 10 °~30 °.
- 4. sintering system according to claim 1, it is characterised in that the radian in the preheating and drying area is 50 °~100 °.
- 5. sintering system according to claim 1, it is characterised in that the radian of the sintering zone is 200 °~250 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408750.1U CN206721295U (en) | 2017-04-18 | 2017-04-18 | A kind of sintering system of chromite powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408750.1U CN206721295U (en) | 2017-04-18 | 2017-04-18 | A kind of sintering system of chromite powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206721295U true CN206721295U (en) | 2017-12-08 |
Family
ID=60505997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720408750.1U Expired - Fee Related CN206721295U (en) | 2017-04-18 | 2017-04-18 | A kind of sintering system of chromite powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206721295U (en) |
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2017
- 2017-04-18 CN CN201720408750.1U patent/CN206721295U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190102 Granted publication date: 20171208 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220102 Granted publication date: 20171208 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171208 Termination date: 20190418 |