CN206828596U - A kind of system for preparing sintering chromite - Google Patents
A kind of system for preparing sintering chromite Download PDFInfo
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- CN206828596U CN206828596U CN201720408940.3U CN201720408940U CN206828596U CN 206828596 U CN206828596 U CN 206828596U CN 201720408940 U CN201720408940 U CN 201720408940U CN 206828596 U CN206828596 U CN 206828596U
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- entrance
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- pelletizing
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Abstract
The utility model provides a kind of system for preparing sintering chromite.The system includes：Mixing device, there is chromite powder entrance, lime stone entrance, silica entrance, high volatile coal entrance and mixed powder outlet；Briquetting device, there is mixed powder entrance and pelletizing to export, mixed powder entrance is connected with the mixed powder outlet of mixing device；Powder device is wrapped up in, there is pelletizing entrance, low volatile coal entrance and wrap up in the outlet of sphere of powder group, pelletizing entrance is connected with the pelletizing outlet of briquetting device；Sintering equipment, have and wrap up in sphere of powder group's entrance and agglomerates of sintered pellets outlet, 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；Breaker, there is agglomerates of sintered pellets entrance and muck to export, agglomerates of sintered pellets entrance is connected with the agglomerates of sintered pellets outlet of sintering equipment；Screening plant, there is muck entrance and finished product sintering deposit to export, muck entrance is connected with the muck outlet of breaker.Sinter quality obtained by the utility model is high, and with sintering temperature is low, low power consumption and other advantages.
Description
Technical field
The utility model belongs to ferroalloy smelting technical field, in particular it relates to a kind of system for preparing 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 sintering method main at present has direct sintering and 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, invest compared with
Greatly.
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 system provided by the utility model for preparing sintering chromite, including：
Mixing device, there is chromite powder entrance, lime stone entrance, silica entrance, high volatile coal entrance and mixed powder
Outlet；
Briquetting device, there is mixed powder entrance and pelletizing to export, the mixing of the mixed powder entrance and the mixing device
Powder outlet is connected；
Wrap up in powder device, have pelletizing entrance, low volatile coal entrance and wrap up in the sphere of powder group outlet, the pelletizing entrance with it is described
The pelletizing outlet of briquetting device is connected；
Sintering equipment, have and wrap up in sphere of powder group's entrance and agglomerates of sintered pellets outlet, sphere of powder group's entrance of wrapping up in wraps up in powder dress with described
The sphere of powder group outlet of wrapping up in put is connected；
Breaker, there is agglomerates of sintered pellets entrance and muck to export, the agglomerates of sintered pellets entrance and the sintering equipment
Agglomerates of sintered pellets outlet is connected；
Screening plant, there is muck entrance and finished product sintering deposit to export, the muck entrance is broken with the breaker
Ore deposit outlet is connected.
Preferably, the mixing device is horizontal drum batch mixer.
Preferably, the briquetting device is two pairs of rollers ball press.
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 will be wrapped up in by the way that chromite powder, lime stone, silica and high volatile coal are mixed into pressure ball outside pelletizing
One layer of low volatile coal sinters, and is cooled down, crushed after sintering, sieving acquisition finished product sintering deposit, and gained sintering deposit is Well-recovered,
Intensity is high, low power consumption and other advantages.
Brief description of the drawings
Fig. 1 is the structural representation of the system of the preparation 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.Wt% refers to matter in the utility model
Measure percentage composition.
As shown in figure 1, the system provided by the utility model for preparing sintering chromite includes mixing device 1, briquetting device
2nd, powder device 3, sintering equipment 4, breaker 5 and screening plant 6 are wrapped up in.
Mixing device 1 is used to mix chromite powder, lime stone, silica and high volatile coal.Mixing device 1 has chromite
Powder entrance, lime stone entrance, silica entrance, high volatile coal entrance and mixed powder outlet.Preferably implement in the utility model
In example, mixing device 1 is horizontal drum batch mixer.
Briquetting device 2 is used to the mixed powder that mixing device 1 is prepared being pressed into pelletizing.Briquetting device 2 has mixed powder
Entrance and pelletizing outlet, mixed powder entrance are connected with the mixed powder outlet of mixing device 1.In the utility model preferred embodiment
In, briquetting device 2 is two pairs of rollers ball press.
Powder device 3 is wrapped up in be used to uniformly wrap one layer of low volatile coal on pelletizing surface.Wrap up in powder device 3 with pelletizing entrance,
Low volatile coal entrance is connected with the outlet of sphere of powder group, pelletizing entrance is wrapped up in the pelletizing outlet of briquetting device 2.It is excellent in the utility model
In the embodiment of choosing, it is disc balling machine to wrap up in powder device 3.
Sintering equipment 4 is used to prepare agglomerates of sintered pellets.Sintering equipment 4, which has, wraps up in sphere of powder group's entrance and agglomerates of sintered pellets outlet, wraps up in
Wrap up in sphere of powder group outlet of sphere of powder group's entrance with wrapping up in powder device 3 is connected.In the utility model preferred embodiment, sintering equipment 4
For air-draft-type sintering machine.
Pelletizing after sintering is crushed after supercooling in breaker 5, then filters out size in screening plant 6
Suitable finished product sintering deposit.
There is breaker 5 agglomerates of sintered pellets entrance and muck to export, the agglomerates of sintered pellets of agglomerates of sintered pellets entrance and sintering equipment 4
Outlet is connected.There is screening plant 6 muck entrance and finished product sintering deposit to export, and the muck of muck entrance and breaker 5 exports
It is connected.
The utility model will be wrapped up in by the way that chromite powder, lime stone, silica and high volatile coal are mixed into pressure ball outside pelletizing
One layer of low volatile coal sinters, and is cooled down, crushed after sintering, sieving acquisition finished product sintering deposit, and gained sintering deposit is Well-recovered,
Intensity is high, low power consumption and other advantages.
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, lime stone, silica, high volatile coal and low volatile coal.Cr in chromite used2O3Contain
Measure as 42.5wt%, Cr2O3/ FeO=2.4, MgO content are 6.5wt%；CaCO in lime stone3Content be 92.3wt%,
SiO in silica2Content be 97.5wt%；C content is 51.5wt% in high volatile coal, and volatile matter content is
41.3wt%；C content is 82.4wt%, volatile matter content 7.2wt% in low volatile coal.
Chromite, lime stone, silica, high volatile coal are crushed to below 1mm respectively, low volatile coal is crushed to grain
Footpath is less than 0.4mm.
Mass ratio according to chromite powder, lime stone, silica, high volatile coal is 1:0.05:0.05:0.05 ratio is mixed
Expect device 1 mix after in briquetting device 2 briquetting, pellet size 20mm.
Mass ratio according to pelletizing, low volatile coal is 1:0.01 ratio, pelletizing surface is wrapped up in one layer in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in low volatile coal, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain agglomerates of sintered pellets.The height of the bed of material in sintering equipment 4
For 400mm.The firing temperature of sintering is 1000 DEG C.
Agglomerates of sintered pellets is sequentially sent to crush after cooling down in breaker 5 and screening plant 6, sieved, choosing granularity is
20mm finished product sintering deposit.
The drum strength of sintering deposit is 87.25%, and reduction swellability rate is 6.33%, reduction and pulverization ratio RDI+3.15It is more than
91%.
Embodiment 2
Sintering chromite is prepared using the system shown in Fig. 1, idiographic flow is as follows：
Prepare chromite, lime stone, silica, high volatile coal and low volatile coal.Cr in chromite used2O3Contain
Measure as 45.8wt%, Cr2O3/ FeO=2.3, MgO content are 5.8wt%；CaCO in lime stone3Content be 91.5wt%,
SiO in silica2Content be 91.3wt%；C content is 52.3wt% in high volatile coal, and volatile matter content is
43.5wt%；C content is 82.5wt%, volatile matter content 7.6wt% in low volatile coal.
Chromite, lime stone, silica, high volatile coal are crushed to below 1mm respectively, low volatile coal is crushed to grain
Footpath is less than 0.4mm.
Mass ratio according to chromite powder, lime stone, silica, high volatile coal is 1:0.15:0.1:0.07 ratio is mixed
Expect device 1 mix after in briquetting device 2 briquetting, pellet size 30mm.
Mass ratio according to pelletizing, low volatile coal is 1:0.02 ratio, pelletizing surface is wrapped up in one layer in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in low volatile coal, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain agglomerates of sintered pellets.The height of the bed of material in sintering equipment 4
For 800mm.The firing temperature of sintering is 1300 DEG C.
Agglomerates of sintered pellets is sequentially sent to crush after cooling down in breaker 5 and screening plant 6, sieved, choosing granularity is
30mm finished product sintering deposit.
The drum strength of sintering deposit is 87.13%, 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, lime stone, silica, high volatile coal and low volatile coal.Cr in chromite used2O3Contain
Measure as 46.3wt%, Cr2O3/ FeO=2.2, MgO content are 6.1wt%；CaCO in lime stone3Content be 92.8wt%,
SiO in silica2Content be 96.5wt%；C content is 54.3wt% in high volatile coal, and volatile matter content is
42.6wt%；C content is 84.5wt%, volatile matter content 8.5wt% in low volatile coal.
Chromite, lime stone, silica, high volatile coal are crushed to below 1mm respectively, low volatile coal is crushed to grain
Footpath is less than 0.4mm.
Mass ratio according to chromite powder, lime stone, silica, high volatile coal is 1:0.1:0.15:0.1 ratio is in batch mixing
Device 1 mix after in briquetting device 2 briquetting, pellet size 20mm.
Mass ratio according to pelletizing, low volatile coal is 1:0.02 ratio, pelletizing surface is wrapped up in one layer in powder device 3 is wrapped up in
Sphere of powder group is wrapped up in low volatile coal, acquisition.
It will wrap up in and be sintered in sphere of powder group feeding sintering equipment 4, and obtain agglomerates of sintered pellets.The height of the bed of material in sintering equipment 4
For 600mm.The firing temperature of sintering is 1200 DEG C.
Agglomerates of sintered pellets is sequentially sent to crush after cooling down in breaker 5 and screening plant 6, sieved, choosing granularity is
20mm finished product sintering deposit.
The drum strength of sintering deposit is 88.31%, and reduction swellability rate is 6.85%, reduction and pulverization ratio RDI+3.15It is more than
93%.
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 sinter quality
It is good.
To sum up, the utility model by chromite powder, lime stone, silica and high volatile coal by mixing pressure ball, by pelletizing
One layer of low volatile coal sintering is wrapped up in outside, is cooled down after sintering, crushes, sieves acquisition finished product sintering deposit, gained sintering deposit is also
Originality is good, and intensity is high, low power consumption and other advantages.
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. system for preparing sintering chromite, it is characterised in that including：Mixing device, there is chromite powder entrance, lime stone entrance, silica entrance, high volatile coal entrance and mixed powder outlet；Briquetting device, there is mixed powder entrance and pelletizing to export, the mixed powder of the mixed powder entrance and the mixing device goes out Mouth is connected；Powder device is wrapped up in, there is pelletizing entrance, low volatile coal entrance and wrap up in the outlet of sphere of powder group, the pelletizing entrance and the briquetting The pelletizing outlet of device is connected；Sintering equipment, have and wrap up in sphere of powder group's entrance and agglomerates of sintered pellets outlet, it is described to wrap up in sphere of powder group's entrance and the powder device wrapped up in The outlet of sphere of powder group is wrapped up in be connected；Breaker, there is agglomerates of sintered pellets entrance and muck to export, the sintering of the agglomerates of sintered pellets entrance and the sintering equipment Pelletizing outlet is connected；Screening plant, there is muck entrance and finished product sintering deposit to export, the muck of the muck entrance and the breaker goes out Mouth is connected.
- 2. system according to claim 1, it is characterised in that the mixing device is horizontal drum batch mixer.
- 3. system according to claim 1, it is characterised in that the briquetting device is two pairs of rollers ball press.
- 4. system according to claim 1, it is characterised in that the powder device of wrapping up in is disc balling machine.
- 5. 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 |
|---|---|---|---|
| CN201720408940.3U CN206828596U (en) | 2017-04-18 | 2017-04-18 | A kind of system for preparing sintering chromite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720408940.3U CN206828596U (en) | 2017-04-18 | 2017-04-18 | A kind of system for preparing sintering chromite |
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| Publication Number | Publication Date |
|---|---|
| CN206828596U true CN206828596U (en) | 2018-01-02 |
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ID=60768489
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720408940.3U Expired - Fee Related CN206828596U (en) | 2017-04-18 | 2017-04-18 | A kind of system for preparing sintering chromite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967880A (en) * | 2017-04-18 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of system and method for preparing sintering chromite |
-
2017
- 2017-04-18 CN CN201720408940.3U patent/CN206828596U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967880A (en) * | 2017-04-18 | 2017-07-21 | 江苏省冶金设计院有限公司 | A kind of system and method for preparing sintering chromite |
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Effective date of registration: 20190102 Granted publication date: 20180102 |
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Date of cancellation: 20220102 Granted publication date: 20180102 |
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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: 20180102 Termination date: 20190418 |