CN206721293U - A kind of preparation system for sintering chromite - Google Patents
A kind of preparation system for sintering chromite Download PDFInfo
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- CN206721293U CN206721293U CN201720408809.7U CN201720408809U CN206721293U CN 206721293 U CN206721293 U CN 206721293U CN 201720408809 U CN201720408809 U CN 201720408809U CN 206721293 U CN206721293 U CN 206721293U
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- powder
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- sintering
- chromite
- pelletizing
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Abstract
The utility model provides a kind of preparation system for sintering chromite.The system includes palletizing device, and there is chromite powder entrance and pelletizing to export；Mixing device, there is lime stone entrance, silica entrance, coke powder entrance and mixed powder outlet；Powder device is wrapped up in, there is pelletizing entrance, mixed powder entrance and wrap up in the outlet of sphere of powder group, pelletizing entrance is connected with the pelletizing outlet of palletizing device, and mixed powder entrance is connected with the mixed powder outlet of mixing device；Sintering equipment, have and wrap up in sphere of powder group's entrance and the outlet of sintering chromite, wrap up in wrap up in sphere of powder group outlet of the sphere of powder group's entrance with wrapping up in powder device and be connected.Simple system of the present utility model, energy consumption is small, and cost is low, and obtained sinter quality is good.
Description
Technical field
The utility model belongs to ferroalloy smelting technical field, in particular it relates to a kind of preparation system for sintering chromite.
Background technology
Chromite is the important source material of ferroalloy production high carbon ferro-chrome, and wherein most is powder.It is if straight during ferrochrome smelting
Connecing can make electric furnace gas permeability be deteriorated with ferrochrome fine ore, deteriorate the working of a furnace, increase energy consumption, be unfavorable for the safe operation of electric furnace, thus must
Chromite powder must be pre-processed.Chromite powder pretreatment main at present has direct sintering and pellet roasting method.
Relative to direct sintering, the yield height of pellet roasting method, quality are good.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
(oxidation) pelletizing is reduced, but requires chromite powder being ground to mass fraction 80% of the granularity less than 0.074mm, technique needs
Large-scale milling apparatus, 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 a kind of simple, ferrochrome that energy consumption is low, sintering effect is good
The preparation system of miberal powder.
The preparation system of sintering chromite provided by the utility model, including：
Palletizing device, there is chromite powder entrance and pelletizing to export；
Mixing device, there is lime stone entrance, silica entrance, coke powder entrance and mixed powder outlet；
Powder device is wrapped up in, there is pelletizing entrance, mixed powder entrance and wrap up in the outlet of sphere of powder group, the pelletizing entrance and the pelletizing
The pelletizing outlet of device is connected, and the mixed powder entrance is connected with the mixed powder outlet of the mixing device；
Sintering equipment, have and wrap up in sphere of powder group's entrance and the outlet of sintering chromite, sphere of powder group's entrance of wrapping up in wraps up in powder with described
The sphere of powder group outlet of wrapping up in of device is connected.
Preferably, the palletizing device is disc balling machine.
Preferably, the mixing device is vertical-type planetary batch mixer.
Preferably, the powder device of wrapping up in is disc balling machine.
Preferably, the sintering equipment is air-draft-type sintering machine.
The utility model is rolled in pelletizing surface burning by by chromite powder pelletizing, by coke powder, lime stone, silica after mixing
Tie, cooled down, crushed after sintering, sieving acquisition finished product sintering deposit, lime stone forms low melting point by chromite with silica
Pelletizing is consolidated very well, makes sinter strength high, lime stone can promote coke powder prereduction chromite well with silica, make
Sintering deposit is Well-recovered, reduces follow-up mine heat furnace smelting difficulty.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the preparation system of sintering chromite in the utility model embodiment.
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.
As shown in figure 1, the preparation system of sintering chromite provided by the utility model includes palletizing device 1, mixing device
2nd, powder device 3 and sintering equipment 4 are wrapped up in.
Palletizing device 1 is used to chromite powder being prepared into pelletizing, and there is palletizing device 1 chromite powder entrance and pelletizing to go out
Mouthful.In the utility model preferred embodiment, palletizing device 1 is disc balling machine.
Mixing device 2 is used for combined lime stone, silica and coke powder, mixing device 2 have lime stone entrance, silica entrance,
Coke powder entrance and mixed powder outlet.In the utility model preferred embodiment, mixing device 2 is vertical-type planetary batch mixer.
Wrap up in powder device 3 to be used to uniformly wrap mixed powder on the surface of pelletizing, wrap up in powder device 3 with pelletizing entrance, mixing
Powder entrance is connected with the outlet of sphere of powder group, pelletizing entrance is wrapped up in the pelletizing outlet of palletizing device 1, mixed powder entrance and mixing device 2
Mixed powder outlet be connected.In the utility model preferred embodiment, it is disc balling machine to wrap up in powder device 3.
Sintering equipment 4 wraps up in sphere of powder group for sintering, and sintering equipment 4, which has, wraps up in sphere of powder group's entrance and the outlet of sintering chromite,
Wrap up in sphere of powder group outlet of the sphere of powder group's entrance with wrapping up in powder device 3 is wrapped up in be connected.In the utility model preferred embodiment, sintering equipment
4 be air-draft-type sintering machine.
System energy consumption provided by the utility model is low, and obtained sintering deposit is Well-recovered.
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
Sintering chromite is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite powder, lime stone, silica, coke powder.Cr in chromite powder used2O3Weight/mass percentage composition be
42.5%, Cr2O3/ FeO=2.4, the mass percent that the chromite powder of particle diameter≤74 μm accounts for is 82.3%；CaCO in lime stone3
Weight/mass percentage composition be 92.3%, the mass percent that the lime stones of particle diameter≤150 μm accounts for is 81.5%；SiO in silica2's
Weight/mass percentage composition is 97.5%, and the mass percent that the silica of particle diameter≤150 μm accounts for is 82.7%；C quality hundred in coke powder
It is 81.5% to divide content, and the mass percent that the coke powder of particle diameter≤150 μm accounts for is 82.4%.
Chromite powder is sent into palletizing device 1 and is prepared into pelletizing.A diameter of 10mm of pelletizing.
Mass ratio according to lime stone, silica, coke powder is 1:0.9:0.9 ratio mixes in mixing device 2, is mixed
Powder.
Mass ratio according to pelletizing, mixed powder is 1:0.1 ratio, one layer of mixing is wrapped up in on pelletizing surface in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in powder, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain sintering chromite.The height of the bed of material in sintering equipment 4
Spend for 400mm.The firing temperature of sintering is 1000 DEG C.
The drum strength for sintering chromite is 88.14%, and reduction swellability rate is 6.54%, reduction and pulverization ratio RDI+3.15It is more than
93%.
Embodiment 2
Sintering chromite is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite powder, lime stone, silica, coke powder.Cr in chromite powder used2O3Weight/mass percentage composition be
43.8%, Cr2O3/ FeO=2.5, the mass percent that the chromite powder of particle diameter≤74 μm accounts for is 81.4%；CaCO in lime stone3
Weight/mass percentage composition be 93.3%, the mass percent that the lime stones of particle diameter≤150 μm accounts for is 82.5%；SiO in silica2's
Weight/mass percentage composition is 98.5%, and the mass percent that the silica of particle diameter≤150 μm accounts for is 81.7%；C quality hundred in coke powder
It is 83.4% to divide content, and the mass percent that the coke powder of particle diameter≤150 μm accounts for is 81.4%.
Chromite powder is sent into palletizing device 1 and is prepared into pelletizing.A diameter of 20mm of pelletizing.
Mass ratio according to lime stone, silica, coke powder is 1:0.8:1.2 ratio mixes in mixing device 2, is mixed
Powder.
Mass ratio according to pelletizing, mixed powder is 1:0.3 ratio, one layer of mixing is wrapped up in on pelletizing surface in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in powder, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain sintering chromite.The height of the bed of material in sintering equipment 4
Spend for 600mm.The firing temperature of sintering is 1200 DEG C.
The drum strength for sintering chromite is 86.25%, and reduction swellability rate is 6.83%, reduction and pulverization ratio RDI+3.15It is more than
92%.
Embodiment 3
Sintering chromite is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite powder, lime stone, silica, coke powder.Cr in chromite powder used2O3Weight/mass percentage composition be
45.3%, Cr2O3/ FeO=2.2, the mass percent that the chromite powder of particle diameter≤74 μm accounts for is 85.7%；CaCO in lime stone3
Weight/mass percentage composition be 91.5%, the mass percent that the lime stones of particle diameter≤150 μm accounts for is 82.4%；SiO in silica2's
Weight/mass percentage composition is 93.2%, and the mass percent that the silica of particle diameter≤150 μm accounts for is 84.8%；C quality hundred in coke powder
It is 82.4% to divide content, and the mass percent that the coke powder of particle diameter≤150 μm accounts for is 84.5%.
Chromite powder is sent into palletizing device 1 and is prepared into pelletizing.A diameter of 15mm of pelletizing.
Mass ratio according to lime stone, silica, coke powder is 1:1.2:0.8 ratio mixes in mixing device 2, is mixed
Powder.
Mass ratio according to pelletizing, mixed powder is 1:0.2 ratio, one layer of mixing is wrapped up in on pelletizing surface in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in powder, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain sintering chromite.The height of the bed of material in sintering equipment 4
Spend for 500mm.The firing temperature of sintering is 1100 DEG C.
The drum strength for sintering chromite is 89.58%, and reduction swellability rate is 5.32%, reduction and pulverization ratio RDI+3.15It is more than
94%.
It was found from above-described embodiment, simple system of the present utility model, energy consumption is small, and cost is low, obtained sinter quality
It is good.
To sum up, the utility model is by by chromite powder pelletizing, and coke powder, lime stone, silica are rolled in into pelletizing table after mixing
Face sinters, and is cooled down, crushed after sintering, sieving acquisition finished product sintering deposit, lime stone forms low melting point by chromium with silica
Iron ore pellets are consolidated very well, make sinter strength high, lime stone can promote coke powder prereduction ferrochrome well with silica
Ore deposit, make sintering deposit Well-recovered, reduce 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. preparation system for sintering chromite, it is characterised in that including：Palletizing device, there is chromite powder entrance and pelletizing to export；Mixing device, there is lime stone entrance, silica entrance, coke powder entrance and mixed powder outlet；Powder device is wrapped up in, there is pelletizing entrance, mixed powder entrance and wrap up in the outlet of sphere of powder group, the pelletizing entrance and the palletizing device Pelletizing outlet be connected, the mixed powder of the mixed powder entrance and the mixing device, which exports, to be connected；Sintering equipment, have and wrap up in sphere of powder group's entrance and the outlet of sintering chromite, sphere of powder group's entrance of wrapping up in wraps up in powder device with described Wrap up in the sphere of powder group outlet be connected.
- 2. preparation system according to claim 1, it is characterised in that the palletizing device is disc balling machine.
- 3. preparation system according to claim 1, it is characterised in that the mixing device is vertical-type planetary batch mixer.
- 4. preparation system according to claim 1, it is characterised in that the powder device of wrapping up in is disc balling machine.
- 5. preparation system according to claim 1, it is characterised in that the sintering equipment is air-draft-type sintering machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408809.7U CN206721293U (en) | 2017-04-18 | 2017-04-18 | A kind of preparation system for sintering chromite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408809.7U CN206721293U (en) | 2017-04-18 | 2017-04-18 | A kind of preparation system for sintering chromite |
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| CN206721293U true CN206721293U (en) | 2017-12-08 |
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| CN201720408809.7U Expired - Fee Related CN206721293U (en) | 2017-04-18 | 2017-04-18 | A kind of preparation system for sintering chromite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967878A (en) * | 2017-04-18 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of preparation system and preparation method for sintering chromite |
-
2017
- 2017-04-18 CN CN201720408809.7U patent/CN206721293U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967878A (en) * | 2017-04-18 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of preparation system and preparation method for sintering chromite |
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