CN206828586U - A kind of system that metallized pellet is prepared using red mud - Google Patents
A kind of system that metallized pellet is prepared using red mud Download PDFInfo
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- CN206828586U CN206828586U CN201720599426.2U CN201720599426U CN206828586U CN 206828586 U CN206828586 U CN 206828586U CN 201720599426 U CN201720599426 U CN 201720599426U CN 206828586 U CN206828586 U CN 206828586U
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- red mud
- entrance
- pelletizing
- outlet
- drying unit
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Abstract
The utility model discloses a kind of system that metallized pellet is prepared using red mud, including：Agitator treating device, filter, the first drying unit, mixing device, press ball device, the second drying unit, reduction apparatus.Filter is connected with agitator treating device, the first drying unit respectively, and mixing device is connected with the first drying unit, press ball device respectively, and the second drying unit is connected with press ball device, reduction apparatus respectively.The utility model can not only promote the sedimentation of red mud by adding calcium oxide during laterite washing, also help the direct-reduction technique of follow-up red mud.
Description
Technical field
The utility model belongs to Direct Reduction Technology comprehensive utilization direction, in particular it relates to which a kind of prepare gold using red mud
Belong to the system of pellet.
Background technology
, it is necessary to which sodium aluminate solution and red mud are separated in Bayer process alumina producing, it is heavy that red mud enters after washing again
Drop groove is precipitated, and is obtained red mud and is carried out stockpiling and follow-up utilization.Because red mud grain graininess is tiny irregular, have higher
Specific surface area, there is a very strong rich water performance, and moisture content these properties, makes its separation extremely difficult typically 60% or so,
Separation needs time overlength, and separation of solid and liquid is unclear, is long-term stacking in the prior art, natural drying, can just try to comprehensively utilize.
Currently in order to improve the efficiency of red- mud settlement and separation in domestic aluminum oxide production process, it is necessary to add efficient flocculant, such wadding
Solidifying agent relies primarily on import, expensive, and is unfavorable for the subsequently utilization to red mud.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of system that metallized pellet is prepared using red mud,
Including：
Agitator treating device, provided with red mud entrance, calcium oxide entrance, hot water inlet and discharging opening；
Filter, filled provided with charging aperture, the outlet of aqueous red mud and filtrate (liquid, the charging aperture with the agitator treating
The discharging opening put is connected；
First drying unit, provided with aqueous red mud entrance and dry red mud outlet, the aqueous red mud entrance and the mistake
The aqueous red mud outlet for filtering device is connected；
Mixing device, exported provided with red mud entrance, reduction coal entrance and compound is dried, the dry red mud entrance and institute
The drying red mud outlet for stating the first drying unit is connected；
Press ball device, exported provided with compound entrance and pelletizing, the mixing of the compound entrance and the mixing device
Material outlet is connected；
Second drying unit, provided with pelletizing entrance and pelletizing outlet is dried, the pelletizing entrance and the press ball device
Pelletizing outlet is connected；
Reduction apparatus, provided with dry pelletizing entrance and metallized pellet outlet, the dry pelletizing entrance and described second
The drying pelletizing outlet of drying unit is connected.
In some embodiments of the utility model, the reduction apparatus includes rotary hearth furnace, rotary kiln or tunnel cave.
The utility model can not only promote the sedimentation of red mud by adding calcium oxide during laterite washing, also have
Beneficial to the direct-reduction technique of follow-up red mud.Calcium oxide promotes the goethite in red mud to be transformed into bloodstone, square sodium at high temperature
Stone is transformed into cancrinite, reduces red mud specific surface area, improves red-mud settlement efficiency.When effect of settling improvement can shorten sedimentation
Between, reduce subsider.
Calcium oxide is added in washing process reduce sodium in red mud and bring into, moreover it is possible to mitigate alkali metal in Direct Reduction
Erosion to refractory material, promote direct reduction reactor.
In addition, calcium oxide mixes with red mud, promote the progress of direct reduction reactor, energy in follow-up Direct Reduction
Improve pelletizing degree of metalization.
Brief description of the drawings
Fig. 1 is a kind of structural representation of system for preparing metallized pellet 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 system provided by the utility model that metallized pellet is prepared using red mud is included：Agitator treating fills
Put 1, filter 2, the first drying unit 3, mixing device 4, press ball device 5, the second drying unit 6, reduction apparatus 7.
Agitator treating device 1 is used to wash red mud, provided with red mud entrance, calcium oxide entrance, hot water inlet and discharging opening.
Filter 2 is used for separating red mud and filtrate, provided with charging aperture, the outlet of aqueous red mud and filtrate (liquid, charging aperture
It is connected with the discharging opening of agitator treating device 1.
First drying unit 3 is used to dry aqueous red mud, provided with aqueous red mud entrance and dries red mud outlet, aqueous red mud
Entrance is connected with the aqueous red mud outlet of filter 2.
Mixing device 4 is used to red mud and reduction coal being well mixed, provided with dry red mud entrance, reduction coal entrance and mixing
Material outlet, dry red mud entrance and be connected with the drying red mud outlet of the first drying unit 3.
Press ball device 5 is used to prepare pelletizing, is exported provided with compound entrance and pelletizing, compound entrance and mixing device 4
Compound outlet be connected.
Second drying unit 6 is used to dry pelletizing provided with pelletizing entrance and dries pelletizing outlet, and pelletizing entrance fills with pressure ball
Put 5 pelletizing outlet be connected.
Reduction apparatus 7 is used to reduce red mud, prepares metallized pellet.Reduction apparatus 7, which is provided with, dries pelletizing entrance and metal
Pellet exports, and dries pelletizing entrance and is connected with the drying pelletizing outlet of the second drying unit 6.
Red mud, calcium oxide, 80 DEG C~100 DEG C of hot water are well mixed, red mud washed in agitator treating device 1
Wash；
Red mud after washing is settled, then filtered in filter 2, obtains aqueous red mud and filtrate；
Aqueous red mud is dried in the first drying unit 3, obtains and dries red mud；
Red mud will be dried to mix in mixing device 4 with reduction coal, be then fed into press ball device 5 and be molded, obtain pelletizing；
Pelletizing is sent into the second drying unit 6 after drying, is re-fed into reduction apparatus 7 and is reduced directly, obtain metal
Pellet.
Caused red mud grain graininess is tiny irregular in alumina producing, has higher specific surface area, has very strong
Rich water performance, separation of solid and liquid is extremely difficult in the infall process of red mud, and separation needs time overlength.The utility model is in red mud
Calcium oxide is added in washing process, the addition of calcium oxide can reduce the specific surface area of red mud, Accelerated subsidence process.Filtrate can be with
Return to the dilution for alumina leaching liquid.
During follow-up direct-reduction processing red mud, calcium oxide can promote the progress of direct reduction reactor, reduce also
Former temperature, promote iron particle to grow up, reduction efficiency is improved, so as to improve pelletizing degree of metalization.
In addition, the addition of calcium oxide, the content of sodium in red mud can be reduced by washing, sodium content can change in red mud
Kind direct-reduction effect, reduces erosion of the alkali metal to direct reduction equipment.
Device used in the utility model can be according to being actually needed any selection.In the utility model preferred embodiment
In, filter is preferably vacuum filter.In the utility model preferred embodiment, reduction apparatus includes rotary hearth furnace, returned
Rotary kiln or tunnel cave.
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
The present embodiment prepares metallized pellet using the system shown in Fig. 1, and idiographic flow is as follows：
The present embodiment uses caused red mud slurry in Bayer process alumina producing, and its water content is 35%.It is sent to
In agitator treating device 1, the calcium oxide for adding equivalent butt red mud quality 5% is stirred, and the hot water for adding 100 DEG C is carried out
Washing.
Red mud after washing is settled, is sent into filter 2 and is filtered, obtain aqueous red mud and filtrate.
Filtrate is returned into the dilution for alumina leaching liquid；Aqueous red mud is sent into the first drying unit 3 and carried out
Dry, obtain and dry red mud.TFe28.65% in red mud, CaO10.27%, Na2O1.62%.
Red mud will be dried and reduction coal is sent into mixing device 4 and is well mixed, obtain compound.The addition of reduction coal is
The 22% of butt red mud quality.
Feed the mixture into press ball device 5, be prepared into pelletizing, and pelletizing is sent into the second drying unit 6 and dried, obtain
Pelletizing must be dried.
It will dry and be reduced directly in pelletizing feeding reduction apparatus 7, and obtain the metallized pellet of degree of metalization 90%.
Embodiment 2
The present embodiment prepares metallized pellet using the system shown in Fig. 1, and idiographic flow is as follows：
The present embodiment uses caused red mud slurry in Bayer process alumina producing, and its water content is 35%.It is sent to
In agitator treating device 1, the calcium oxide for adding equivalent butt red mud quality 15% is stirred, and the hot water for adding 80 DEG C is carried out
Washing.
Red mud after washing is settled, is sent into filter 2 and is filtered, obtain aqueous red mud and filtrate.
Filtrate is returned into the dilution for alumina leaching liquid；Aqueous red mud is sent into the first drying unit 3 and carried out
Dry, obtain and dry red mud.TFe27.19% in red mud, CaO11.36%, Na2O1.08%.
Red mud will be dried and reduction coal is sent into mixing device 4 and is well mixed, obtain compound.The addition of reduction coal is
The 20% of butt red mud quality.
Feed the mixture into press ball device 5, be prepared into pelletizing, and pelletizing is sent into the second drying unit 6 and dried, obtain
Pelletizing must be dried.
It will dry and be reduced directly in pelletizing feeding reduction apparatus 7, and obtain the metallized pellet of degree of metalization 91%.
Embodiment 3
The present embodiment prepares metallized pellet using the system shown in Fig. 1, and idiographic flow is as follows：
The present embodiment uses caused red mud slurry in Bayer process alumina producing, and its water content is 35%.It is sent to
In agitator treating device 1, the calcium oxide for adding equivalent butt red mud quality 3% is stirred, and the hot water for adding 100 DEG C is carried out
Washing.
Red mud after washing is settled, is sent into filter 2 and is filtered, obtain aqueous red mud and filtrate.
Filtrate is returned into the dilution for alumina leaching liquid；Aqueous red mud is sent into the first drying unit 3 and carried out
Dry, obtain and dry red mud.TFe30.63% in red mud, CaO8.76%, Na2O2.17%.
Red mud will be dried and reduction coal is sent into mixing device 4 and is well mixed, obtain compound.The addition of reduction coal is
The 10% of butt red mud quality.
Feed the mixture into press ball device 5, be prepared into pelletizing, and pelletizing is sent into the second drying unit 6 and dried, obtain
Pelletizing must be dried.
It will dry and be reduced directly in pelletizing feeding reduction apparatus 7, and obtain the metallized pellet of degree of metalization 88%.
Embodiment 4
The present embodiment prepares metallized pellet using the system shown in Fig. 1, and idiographic flow is as follows：
The present embodiment uses caused red mud slurry in Bayer process alumina producing, and its water content is 35%.It is sent to
In agitator treating device 1, the calcium oxide for adding equivalent butt red mud quality 20% stirs, and the hot water for adding 100 DEG C enters
Row washing.
Red mud after washing is settled, is sent into filter 2 and is filtered, obtain aqueous red mud and filtrate.
Filtrate is returned into the dilution for alumina leaching liquid；Aqueous red mud is sent into the first drying unit 3 and carried out
Dry, obtain and dry red mud.TFe26.97% in red mud, CaO18.21%, Na2O1.09%.
Red mud will be dried and reduction coal is sent into mixing device 4 and is well mixed, obtain compound.The addition of reduction coal is
The 30% of butt red mud quality.
Feed the mixture into press ball device 5, be prepared into pelletizing, and pelletizing is sent into the second drying unit 6 and dried, obtain
Pelletizing must be dried.
It will dry and be reduced directly in pelletizing feeding reduction apparatus 7, and obtain the metallized pellet of degree of metalization 89%.
It was found from above-described embodiment, using the degree of metalization of technique of the present utility model metallized pellet as made from red mud
It is high.
To sum up, the utility model can not only promote the sedimentation of red mud by adding calcium oxide during laterite washing,
Also help the direct-reduction technique of follow-up red mud.Calcium oxide promotes the goethite in red mud to be transformed into bloodstone at high temperature,
Sodalite is transformed into cancrinite, reduces red mud specific surface area, improves red-mud settlement efficiency.Effect of settling, which improves, can shorten sedimentation
Time, reduce subsider.
Calcium oxide is added in washing process reduce sodium in red mud and bring into, moreover it is possible to mitigate alkali metal in Direct Reduction
Erosion to refractory material, promote direct reduction reactor.
In addition, calcium oxide mixes with red mud, promote the progress of direct reduction reactor, energy in follow-up Direct Reduction
Improve pelletizing degree of metalization.
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 (2)
- A kind of 1. system that metallized pellet is prepared using red mud, it is characterised in that including：Agitator treating device, provided with red mud entrance, calcium oxide entrance, hot water inlet and discharging opening；Filter, provided with charging aperture, the outlet of aqueous red mud and filtrate (liquid, the charging aperture and the agitator treating device Discharging opening is connected；First drying unit, provided with aqueous red mud entrance and red mud outlet is dried, the aqueous red mud entrance fills with the filtering The aqueous red mud outlet put is connected；Mixing device, provided with drying red mud entrance, reduction coal entrance and compound outlet, the dry red mud entrance and described the The drying red mud outlet of one drying unit is connected；Press ball device, is exported provided with compound entrance and pelletizing, and the compound of the compound entrance and the mixing device goes out Mouth is connected；Second drying unit, provided with pelletizing entrance and dry pelletizing outlet, the pelletizing of the pelletizing entrance and the press ball device Outlet is connected；Reduction apparatus, provided with pelletizing entrance and metallized pellet outlet is dried, the dry pelletizing entrance is dried with described second The drying pelletizing outlet of device is connected.
- 2. system according to claim 1, it is characterised in that the reduction apparatus includes rotary hearth furnace, rotary kiln or tunnel Kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720599426.2U CN206828586U (en) | 2017-05-25 | 2017-05-25 | A kind of system that metallized pellet is prepared using red mud |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720599426.2U CN206828586U (en) | 2017-05-25 | 2017-05-25 | A kind of system that metallized pellet is prepared using red mud |
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| Publication Number | Publication Date |
|---|---|
| CN206828586U true CN206828586U (en) | 2018-01-02 |
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| CN201720599426.2U Expired - Fee Related CN206828586U (en) | 2017-05-25 | 2017-05-25 | A kind of system that metallized pellet is prepared using red mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083478A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | A kind of utilization red mud prepares the method and system of metallized pellet |
-
2017
- 2017-05-25 CN CN201720599426.2U patent/CN206828586U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107083478A (en) * | 2017-05-25 | 2017-08-22 | 江苏省冶金设计院有限公司 | A kind of utilization red mud prepares the method and system of metallized pellet |
| CN107083478B (en) * | 2017-05-25 | 2018-08-28 | 江苏省冶金设计院有限公司 | A kind of method and system preparing metallized pellet using red mud |
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