CN105087938B - The method and system of valuable metal is recycled from red mud - Google Patents
The method and system of valuable metal is recycled from red mud Download PDFInfo
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- CN105087938B CN105087938B CN201510471341.1A CN201510471341A CN105087938B CN 105087938 B CN105087938 B CN 105087938B CN 201510471341 A CN201510471341 A CN 201510471341A CN 105087938 B CN105087938 B CN 105087938B
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Abstract
The invention discloses a kind of from red mud recycles the method and system of valuable metal, and this method includes：(1) red mud and reducing agent are mixed and carries out forming processes, to obtain mixing pelletizing；(2) the mixing pelletizing is subjected to calcination process, to obtain the mix products containing granulated iron and tailings；(3) separating treatment is carried out containing the mix products of granulated iron and tailings by described, to respectively obtain granulated iron and tailings；(4) acidleach processing is carried out to the tailings with hydrochloric acid, to obtain titaniferous leached mud and to contain liquid after scandium leaches；And (5) carry out the titaniferous leached mud to propose titanium processing.The substep high efficiente callback that valuable metal iron, scandium and titanium elements in red mud may be implemented in this method utilizes, to widen the utility value of red mud.
Description
Technical field
The invention belongs to chemical fields, specifically, the method that the present invention relates to a kind of to recycle valuable metal from red mud
And system.
Background technology
Red mud is that bauxite refines the waste generated in alumina process, is gained the name because it is crimson color mud.With
The red mud discharge capacity of the continuous development of aluminum i ndustry, about 60,000,000 tons of red muds of the annual output in the whole world at present, China is 4,500,000 every year
Ton or more.Most of alumina producers are to accumulate or be poured into deep-sea by red mud in the world.In red mud containing a large amount of iron, aluminium, sodium,
The stockpiling of the metals such as calcium, red mud does not only take up a large amount of soil and farmland, expends more stockyard construction and maintenance cost, causes
Serious water pollution, and waste a large amount of metals resources.Valence metal component such as Fe contained in red mud3O4、Al2O3、Na2O、
TiO2Deng the mostly lower base metal of economic value, individually just a certain element is recycled and not can solve technique
Economy and the huge problem of red mud storage, it is necessary to which red mud could really be realized using various metals combined recovery technology
Comprehensive utilization and minimizing.Therefore, the comprehensive treatment of red mud and its effective recycling of metals resources are as people's growing interest
Focus.
Invention content
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the present invention
One purpose is to propose a kind of method and system recycling valuable metal from red mud, and this method may be implemented valuable in red mud
The substep high efficiente callback of metallic iron, scandium and titanium elements utilizes, to widen the utility value of red mud.
In one aspect of the invention, the present invention proposes a kind of method recycling valuable metal from red mud.According to this
The embodiment of invention, this method include：
(1) red mud and reducing agent are mixed and carries out forming processes, to obtain mixing pelletizing；
(2) the mixing pelletizing is subjected to calcination process, to obtain the mix products containing granulated iron and tailings；
(3) separating treatment is carried out containing the mix products of granulated iron and tailings by described, to respectively obtain granulated iron and tailings；
(4) acidleach processing is carried out to the tailings with hydrochloric acid, to obtain titaniferous leached mud and to contain liquid after scandium leaches；And
(5) the titaniferous leached mud is carried out proposing titanium processing.
It is according to the ... of the embodiment of the present invention as a result, that valuable gold in red mud may be implemented from the method for recycling valuable metal in red mud
The substep high efficiente callback for belonging to iron, scandium and titanium elements utilizes, to widen the utility value of red mud.
In addition, the method according to the above embodiment of the present invention for recycling valuable metal from red mud can also be with following attached
The technical characteristic added：
In some embodiments of the invention, the TiO of the red mud2Content is not less than 7wt%, and Sc contents are not less than
80ppm。
In some embodiments of the invention, carbon content is fixed in the reducing agent and is not less than 70wt%, and ash content is not higher than
8wt%.Thus, it is possible to significantly improve the reduction effect that metal pastes during calcination process.
In some embodiments of the invention, carbon oxygen molar ratio is 1~1.3 in the mixing pelletizing.Thus, it is possible into one
Step improves the reduction effect of calcination process process metallic iron.
In another aspect of the present invention, the present invention proposes a kind of system recycling valuable metal from red mud, according to
The embodiment of the present invention, the system include：
Molding machine, the molding machine has red mud entrance, reducing agent entrance and the outlet of mixing pelletizing, and being suitable for will be red
Mud and reducing agent mixing carry out forming processes, to obtain mixing pelletizing；
Calciner, the calciner have mixing pelletizing entrance and mix products outlet, the mixing pelletizing entrance
It is connected with mixing pelletizing outlet, and suitable for the mixing pelletizing is carried out calcination process, to obtain containing granulated iron and tail
The mix products of slag；
Separator, the separator have mix products entrance, granulated iron outlet and tailings outlet, the mix products
Entrance is connected with mix products outlet, and suitable for carrying out the mix products of the granulated iron contained and tailings at separation
Reason, to respectively obtain granulated iron and tailings；
Acidleach device, after there is the acidleach device tailings entrance, hydrochloric acid entrance, titaniferous leached mud to export and be leached containing scandium
Liquid exports, and the tailings entrance is connected with tailings outlet, and suitable for the tailings and hydrochloric acid are carried out acidleach processing, so as to
Liquid after obtaining titaniferous leached mud and being leached containing scandium；And
Titanium device is carried, the titanium device that carries is connected with titaniferous leached mud outlet, and is suitable for the titaniferous leached mud
It carries out proposing titanium processing.
It is according to the ... of the embodiment of the present invention as a result, that valuable gold in red mud may be implemented from the system for recycling valuable metal in red mud
The substep high efficiente callback for belonging to iron, scandium and titanium elements utilizes, to widen the utility value of red mud.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination following accompanying drawings to embodiment
Obviously and it is readily appreciated that, wherein：
Fig. 1 is the method flow schematic diagram according to an embodiment of the invention that valuable metal is recycled from red mud；
Fig. 2 is the system structure diagram according to an embodiment of the invention that valuable metal is recycled from red mud.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature can be with "above" or "below" second feature
It is that the first and second features are in direct contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is directly under or diagonally below the second feature, or is merely representative of fisrt feature level height and is less than second feature.
In one aspect of the invention, the present invention proposes a kind of method recycling valuable metal from red mud.According to this
The embodiment of invention, this method include：(1) red mud and reducing agent are mixed and carries out forming processes, to obtain mixing pelletizing；
(2) the mixing pelletizing is subjected to calcination process, to obtain the mix products containing granulated iron and tailings；(3) contain by described in
Granulated iron and tailings mix products carry out separating treatment, to respectively obtain granulated iron and tailings；(4) with hydrochloric acid to the tailings
Acidleach processing is carried out, to obtain titaniferous leached mud and to contain liquid after scandium leaches；And (5) carry out the titaniferous leached mud to carry titanium
Processing.Inventor's discovery can be using the calcium oxide in red mud as red mud in roasting process by mixing red mud and reducing agent
In oxides-containing iron fluxing agent, to reduce the calcination process temperature of oxides-containing iron, and metal can be effectively facilitated
The reduction of iron, and then granulated iron is can be obtained through step reduction, compared with prior art, addition need not be additionally added in the present invention
Agent, so that impurity will not be introduced, simultaneously because the ferro element rate of recovery is high so that in gained tailings the impurity contents such as iron compared with
It is low that the high efficiente callback of scandium and titanium can be realized to get to the tailings rich in scandium and titanium, and then through subsequent selective leaching, and soak
Acid solution usage amount is decreased obviously during going out, and in addition the height of valuable metal iron in red mud, scandium and titanium elements may be implemented in this method
Effect recycling, to widen the utility value of red mud, realization turns harm into good, and turns waste into wealth, to fundamentally solve red mud this
Plant the problem that trade waste utilization rate is low and stores up for a long time.
The method that valuable metal is recycled in the slave red mud of the embodiment of the present invention is described in detail below with reference to Fig. 1.Root
According to the embodiment of the present invention, this method includes：
S100：Red mud and reducing agent are mixed and carry out forming processes
According to an embodiment of the invention, red mud and reducing agent are mixed and carries out forming processes, so as to obtain mixing ball
Group.Inventor's discovery can be using the calcium oxide in red mud as in red mud in roasting process by mixing red mud and reducing agent
Oxides-containing iron fluxing agent, to reduce the calcination process temperature of oxides-containing iron, and metallic iron can be effectively facilitated
Reduction, and then through a step reduction can be obtained granulated iron, compared with prior art, additive need not be additionally added in the present invention,
To which impurity will not be introduced, simultaneously because the ferro element rate of recovery is high, so that the impurity contents such as iron are relatively low in gained tailings, i.e.,
The tailings rich in scandium and titanium is obtained, and then leaches the high efficiente callback that scandium and titanium can be realized through subsequent selective, and was leached
Acid solution usage amount is decreased obviously in journey.
According to one embodiment of present invention, the content of titanium dioxide and scandium is not particularly restricted in red mud, this field
Technical staff can select according to actual needs, according to a particular embodiment of the invention, the TiO of red mud2Content can not
Less than 7wt%, Sc contents can be not less than 80ppm.Thus, it is possible to significantly improve the utility value of red mud.
According to still a further embodiment, fixed carbon and content of ashes are not particularly restricted in reducing agent, ability
Field technique personnel can select according to actual needs, according to a particular embodiment of the invention, carbon content be fixed in reducing agent
70wt% can be not less than, ash content can be not higher than 8wt%.Inventor find, if reducing agent fix carbon content it is too low and simultaneously
Ash content is excessively high, then needs that more reducing agents are added and ash content all enters in the tailings after reduction, can lead to the quantity of slag after reduction
Increase, since the amount of metal of titanium and scandium is constant, quantity of slag increase causes scandium, Ti content to reduce, and can increase acid consumption in follow-up acidleach
Amount.
According to still another embodiment of the invention, the mixed proportion of red mud and reducing agent is not particularly restricted, this field
Technical staff can select according to actual needs, according to a particular embodiment of the invention, the mixing ratio of red mud and reducing agent
Example is to ensure that carbon oxygen molar ratio is 1~1.3 in mixing pelletizing.Inventor has found, if carbon-to-oxygen ratio is less than 1.0, the iron in red mud
It as much as possible cannot be reduced, some is still present in the form of iron oxide in tailings, the increase of iron content in tailings
Sour consumption in follow-up acidleach can be increased.And if carbon-to-oxygen ratio is excessively high, needs that more reducing agents are added, and leads to quantity of slag increasing after reduction
Add, since the amount of metal of titanium and scandium is constant, quantity of slag increase causes scandium, Ti content to reduce, and can increase sour consumption in follow-up acidleach.
Meanwhile carbon-to-oxygen ratio is excessively high, impurity content increases, and influences the aggregation of iron particle in red mud reduction process, influences the production effect of granulated iron
Fruit.
S200：Mixed material is subjected to calcination process
According to an embodiment of the invention, mixed material obtained above is subjected to calcination process, so as to be contained
The mix products of granulated iron and tailings.Inventor has found, by carrying out red mud and reducing agent mixing pelletizing after molding at roasting
Reason, can be using the calcium oxide in red mud as the fluxing agent of the oxides-containing iron in red mud in roasting process, to reduce iron content
The calcination process temperature of oxide, and the reduction of metallic iron can be effectively facilitated, and then granulated iron is can be obtained through step reduction,
Simultaneously because the ferro element rate of recovery is high, so that the impurity contents such as iron are relatively low to get to rich in scandium and titanium in gained tailings
Tailings, and then the high efficiente callback that scandium and titanium can be realized is leached through subsequent selective.
S300：Separating treatment will be carried out containing the mix products of granulated iron and tailings
According to an embodiment of the invention, the mix products containing granulated iron and tailings obtained by step S200 are carried out at separation
Reason, so as to respectively obtain granulated iron and tailings.In the step, specifically, step S200 can be obtained containing granulated iron and
The mix products of tailings carry out broken and magnetic separation, to realize the separation of granulated iron product and tailings.
S400：Acidleach processing is carried out to tailings with hydrochloric acid
According to an embodiment of the invention, acidleach processing is carried out to tailings with hydrochloric acid, so as to obtain titaniferous leached mud and
Liquid after being leached containing scandium.Inventor has found, since the ferro element rate of recovery is high so that in gained tailings the impurity contents such as iron compared with
It is low to get to the tailings rich in scandium and titanium, and then chosen property leaches the high efficiente callback that scandium can be realized, and acid solution usage amount
It is substantially reduced.
S500：Titaniferous leached mud is carried out to propose titanium processing
In the step, specifically, being cured to titaniferous leached mud first with sulfuric acid, then water logging carries titanium
It takes.
The method according to the ... of the embodiment of the present invention that valuable metal is recycled from red mud, can by mixing red mud and reducing agent
Using the fluxing agent by the calcium oxide in red mud as the oxides-containing iron in red mud in roasting process, to reduce oxides-containing iron
Calcination process temperature, and the reduction of metallic iron can be effectively facilitated, and then granulated iron is can be obtained through step reduction, and it is existing
Technology is compared, and additive need not be additionally added in the present invention, to which impurity will not be introduced, simultaneously because the ferro element rate of recovery is high,
It is soaked to get to the tailings rich in scandium and titanium, and then through subsequent selective so that the impurity contents such as iron are relatively low in gained tailings
Go out can be realized the high efficiente callback of scandium and titanium, and acid solution usage amount is decreased obviously in leaching process, in addition this method can be real
The high efficiente callback of valuable metal iron, scandium and titanium elements in existing red mud, to widen the utility value of red mud, realizationization evil is
Profit turns waste into wealth, to fundamentally solve the problems, such as that this trade waste utilization rate of red mud is low and stores up for a long time.
In another aspect of the present invention, the present invention proposes a kind of system recycling valuable metal from red mud.According to
The embodiment of the present invention, the system include：Molding machine, the molding machine have red mud entrance, reducing agent entrance and mixing
Pelletizing exports, and carries out forming processes suitable for mixing red mud and reducing agent, to obtain mixing pelletizing；Calciner, it is described
There is calciner mixing pelletizing entrance and mix products outlet, the mixing pelletizing entrance to export phase with the pelletizing that mixes
Even, and suitable for the mixing pelletizing is carried out calcination process, to obtain the mix products containing granulated iron and tailings；Separation dress
It sets, there is the separator mix products entrance, granulated iron outlet and tailings outlet, the mix products entrance to be mixed with described
Product exit is connected, and suitable for the mix products of the granulated iron contained and tailings are carried out separating treatment, to respectively obtain
Granulated iron and tailings；Acidleach device, the acidleach device have tailings entrance, hydrochloric acid entrance, the outlet of titaniferous leached mud and are soaked containing scandium
Going out rear liquid outlet, the tailings entrance is connected with tailings outlet, and suitable for the tailings and hydrochloric acid are carried out acidleach processing,
To obtain titaniferous leached mud and to contain liquid after scandium leaches；And titanium device is carried, the titanium device that carries goes out with the titaniferous leached mud
Mouth is connected, and suitable for carrying out the titaniferous leached mud to propose titanium processing.Inventor has found, by the way that red mud and reducing agent are mixed,
It can be using the calcium oxide in red mud as the fluxing agent of the oxides-containing iron in red mud in roasting process, to reduce iron content oxidation
The calcination process temperature of object, and the reduction of metallic iron can be effectively facilitated, and then granulated iron is can be obtained through step reduction, and it is existing
There is technology to compare, additive need not be additionally added in the present invention, to introduce impurity, simultaneously because the ferro element rate of recovery
Height, so that the impurity contents such as iron are relatively low to get to the tailings rich in scandium and titanium in gained tailings, and then through subsequent selective
It leaches and the high efficiente callback of scandium and titanium can be realized, and acid solution usage amount is decreased obviously in leaching process, in addition the system can be with
Realize the high efficiente callback of valuable metal iron, scandium and titanium elements in red mud, to widen the utility value of red mud, realizationization evil is
Profit turns waste into wealth, to fundamentally solve the problems, such as that this trade waste utilization rate of red mud is low and stores up for a long time.
The system that valuable metal is recycled in the slave red mud of the embodiment of the present invention is described in detail below with reference to Fig. 2.Root
According to the embodiment of the present invention, which includes：
Molding machine 100：According to an embodiment of the invention, molding machine 100 has red mud entrance 101, reducing agent entrance
102 export 103 with mixing pelletizing, and suitable for red mud and reducing agent are mixed progress forming processes, so as to obtain mixing ball
Group.Inventor's discovery can be using the calcium oxide in red mud as in red mud in roasting process by mixing red mud and reducing agent
Oxides-containing iron fluxing agent, to reduce the calcination process temperature of oxides-containing iron, and metallic iron can be effectively facilitated
Reduction, and then through a step reduction can be obtained granulated iron, compared with prior art, additive need not be additionally added in the present invention,
To which impurity will not be introduced, simultaneously because the ferro element rate of recovery is high, so that the impurity contents such as iron are relatively low in gained tailings, i.e.,
The tailings rich in scandium and titanium is obtained, and then leaches the high efficiente callback that scandium and titanium can be realized through subsequent selective, and was leached
Acid solution usage amount is decreased obviously in journey.
According to one embodiment of present invention, the content of titanium dioxide and scandium is not particularly restricted in red mud, this field
Technical staff can select according to actual needs, according to a particular embodiment of the invention, the TiO of red mud2Content can not
Less than 7wt%, Sc contents can be not less than 80ppm.Thus, it is possible to significantly improve the utility value of red mud.
According to still a further embodiment, fixed carbon and content of ashes are not particularly restricted in reducing agent, ability
Field technique personnel can select according to actual needs, according to a particular embodiment of the invention, carbon content be fixed in reducing agent
70wt% can be not less than, ash content can be not higher than 8wt%.Inventor find, if reducing agent fix carbon content it is too low and simultaneously
Ash content is excessively high, then needs that more reducing agents are added and ash content all enters in the tailings after reduction, can lead to the quantity of slag after reduction
Increase, since the amount of metal of titanium and scandium is constant, quantity of slag increase causes scandium, Ti content to reduce, and can increase acid consumption in follow-up acidleach
Amount.
According to still another embodiment of the invention, the mixed proportion of red mud and reducing agent is not particularly restricted, this field
Technical staff can select according to actual needs, according to a particular embodiment of the invention, the mixing ratio of red mud and reducing agent
Example is to ensure that carbon oxygen molar ratio is 1~1.3 in mixing pelletizing.Inventor has found, if carbon-to-oxygen ratio is less than 1.0, the iron in red mud
It as much as possible cannot be reduced, some is still present in the form of iron oxide in tailings, the increase of iron content in tailings
Sour consumption in follow-up acidleach can be increased.If carbon-to-oxygen ratio is excessively high, need that more reducing agents are added, the quantity of slag increases after leading to reduction
Add, since the amount of metal of titanium and scandium is constant, quantity of slag increase causes scandium, Ti content to reduce, and can increase sour consumption in follow-up acidleach.
Meanwhile carbon-to-oxygen ratio is excessively high, impurity content increases, and influences the aggregation of iron particle in red mud reduction process, influences the production effect of granulated iron
Fruit.
Calciner 200：According to an embodiment of the invention, calciner 200 has mixing pelletizing entrance 201 and mixing production
Object outlet 202, mixing pelletizing entrance 201 are connected with mixing pelletizing outlet 103, and suitable for carrying out mixed material obtained above
Calcination process, so as to obtain the mix products containing granulated iron and tailings.Inventor has found, by by red mud and reducing agent at
Mixing pelletizing after type carries out calcination process, can be aoxidized the calcium oxide in red mud as the iron content in red mud in roasting process
The fluxing agent of object to reduce the calcination process temperature of oxides-containing iron, and can effectively facilitate the reduction of metallic iron, in turn
Granulated iron is can be obtained through step reduction, simultaneously because the ferro element rate of recovery is high, so that the impurity contents such as iron in gained tailings
It is relatively low to get to the tailings rich in scandium and titanium, and then the high efficiente callback that scandium and titanium can be realized is leached through subsequent selective.
Separator 300：According to an embodiment of the invention, there is separator 300 mix products entrance 301, granulated iron to go out
Mouthfuls 302 and tailings outlet 303, mix products entrance 301 be connected with mix products outlet 202, and suitable for gained contain granulated iron with
The mix products of tailings carry out separating treatment, so as to respectively obtain granulated iron and tailings.In the step, specifically, can be right
The mix products containing granulated iron and tailings that calciner obtains carry out broken and magnetic separation, to realize granulated iron product and tailings
Separation.
Acidleach device 400：According to an embodiment of the invention, acidleach device 400 has tailings entrance 401, hydrochloric acid entrance
402, liquid outlet 404 after titaniferous leached mud exports 403 and leached containing scandium, tailings entrance 401 is connected with tailings outlet 303, and fits
In carrying out acidleach processing to tailings with hydrochloric acid, so as to obtain titaniferous leached mud and contain liquid after scandium leaches.Inventor's discovery, by
It is high in the ferro element rate of recovery, so that the impurity contents such as iron are relatively low to get to the tailings rich in scandium and titanium in gained tailings, into
And chosen property leaches the high efficiente callback that scandium can be realized, and acid solution usage amount is substantially reduced.
Carry titanium device 500：According to an embodiment of the invention, titanium device 500 is carried with titaniferous leached mud outlet 403 to be connected, and
Suitable for titaniferous leached mud is carried out to propose titanium processing.In the step, specifically, being carried out to titaniferous leached mud first with sulfuric acid ripe
Change, then water logging extracts titanium.
The system according to the ... of the embodiment of the present invention that valuable metal is recycled from red mud, can by mixing red mud and reducing agent
Using the fluxing agent by the calcium oxide in red mud as the oxides-containing iron in red mud in roasting process, to reduce oxides-containing iron
Calcination process temperature, and the reduction of metallic iron can be effectively facilitated, and then granulated iron is can be obtained through step reduction, and it is existing
Technology is compared, and additive need not be additionally added in the present invention, to which impurity will not be introduced, simultaneously because the ferro element rate of recovery is high,
It is soaked to get to the tailings rich in scandium and titanium, and then through subsequent selective so that the impurity contents such as iron are relatively low in gained tailings
Go out can be realized the high efficiente callback of scandium and titanium, and acid solution usage amount is decreased obviously in leaching process, in addition the system can be real
The high efficiente callback of valuable metal iron, scandium and titanium elements in existing red mud, to widen the utility value of red mud, realizationization evil is
Profit turns waste into wealth, to fundamentally solve the problems, such as that this trade waste utilization rate of red mud is low and stores up for a long time.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment 1
Red mud and reducing agent are subjected to mixed ingredients, wherein TFe is 32.08wt%, CaO 21.30wt% in red mud,
SiO2For 18.21wt%, content of titanium dioxide 9.65wt%, scandium content is 86ppm, and fixing carbon content in reducing agent is
Then gained mixed ingredients are rolled mixing by 75wt%, ash content 6.97wt%, mixed material is obtained, then to mixed material
Forming processes are carried out, mixing pelletizing (carbon oxygen molar ratio is 1.0) is obtained, mixing pelletizing is then subjected to reduction roasting processing, is connect
The mix products for the granulated iron and tailings that contain gained carry out broken and magnetic separation, obtain granulated iron and tailings, wherein contain in granulated iron
Iron is 96.1wt%, and TFe is 5.12wt%, TiO in tailings2Content is 20.12wt%, and Sc contents are 98ppm, then use hydrochloric acid
Acidleach processing is carried out to tailings, liquid after obtaining titaniferous leached mud and being leached containing scandium, wherein the leaching rate of scandium is 85wt%, then
Titanium is extracted in water logging after being cured to gained titaniferous leached mud using sulfuric acid, and titanium recovery rate is 90wt%, iron recovery in red mud
For 93wt%, the scandium rate of recovery is 82wt%.
Embodiment 2
Red mud and reducing agent are subjected to mixed ingredients, wherein TFe is 28.9wt%, CaO 11.63wt% in red mud,
SiO2For 10.89wt%, content of titanium dioxide 13.14wt%, scandium content is 120ppm, and fixing carbon content in reducing agent is
Then gained mixed ingredients are rolled mixing by 85wt%, ash content 7.12wt%, mixed material is obtained, then to mixed material
Forming processes are carried out, mixing pelletizing (carbon oxygen molar ratio is 1.2) is obtained, mixing pelletizing is then subjected to reduction roasting processing, is connect
The mix products for the granulated iron and tailings that contain gained carry out broken and magnetic separation, obtain granulated iron and tailings, wherein contain in granulated iron
Iron is 95.22wt%, and TFe is 5.55wt%, TiO in tailings2Content is 26.01wt%, and Sc contents are 144ppm, then use salt
Acid carries out acidleach processing to tailings, liquid after obtaining titaniferous leached mud and being leached containing scandium, wherein the leaching rate of scandium is 87wt%, so
Titanium is extracted in water logging after being cured afterwards to gained titaniferous leached mud using sulfuric acid, and titanium recovery rate is 89wt%, iron recycling in red mud
Rate is 94wt%, and the scandium rate of recovery is 84wt%.
Embodiment 3
Red mud and reducing agent are subjected to mixed ingredients, wherein TFe is 40.27wt%, CaO 12.21wt% in red mud,
SiO2For 13.51wt%, content of titanium dioxide 10.01wt%, scandium content is 92ppm, and fixing carbon content in reducing agent is
Then gained mixed ingredients are rolled mixing by 85wt%, ash content 7.12wt%, mixed material is obtained, then to mixed material
Forming processes are carried out, mixing pelletizing (carbon oxygen molar ratio is 1.3) is obtained, mixing pelletizing is then subjected to reduction roasting processing, is connect
The mix products for the granulated iron and tailings that contain gained carry out broken and magnetic separation, obtain granulated iron and tailings, wherein contain in granulated iron
Iron is 94.56wt%, and TFe is 6.02wt%, TiO in tailings2Content is 21.36wt%, and Sc contents are 105ppm, then use salt
Acid carries out acidleach processing to tailings, liquid after obtaining titaniferous leached mud and being leached containing scandium, wherein the leaching rate of scandium is 83wt%, so
Titanium is extracted in water logging after being cured afterwards to gained titaniferous leached mud using sulfuric acid, and titanium recovery rate is 85wt%, iron recycling in red mud
Rate is 95wt%, and the scandium rate of recovery is 82wt%.
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 included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiments or example.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (3)
1. a kind of method recycling valuable metal from red mud, which is characterized in that including：
(1) red mud and reducing agent are mixed and carries out forming processes, to obtain mixing pelletizing, wherein the oxidation in the red mud
Fluxing agent of the calcium as the oxides-containing iron in red mud in roasting process, additive is not added additionally；
(2) the mixing pelletizing is subjected to calcination process, to obtain the mix products containing granulated iron and tailings；
(3) separating treatment is carried out containing the mix products of granulated iron and tailings by described, to respectively obtain granulated iron and tailings；
(4) acidleach processing is carried out to the tailings with hydrochloric acid, to obtain titaniferous leached mud and to contain liquid after scandium leaches；And
(5) the titaniferous leached mud being cured using sulfuric acid, then water logging extracts titanium,
Wherein, in step (1), carbon oxygen molar ratio is 1~1.3 in the mixing pelletizing,
Carbon content is fixed in the reducing agent and is not less than 70wt%, and ash content is not higher than 8wt%.
2. according to the method described in claim 1, it is characterized in that, the TiO of the red mud2Content is not less than 7wt%, Sc contents
Not less than 80ppm.
3. the system of the method for recycling valuable metal, special in a kind of slave red mud implemented described in any one of claim 1~2
Sign is, including：
Molding machine, the molding machine have red mud entrance, reducing agent entrance and an outlet of mixing pelletizing, and suitable for by red mud and
Reducing agent mixing carries out forming processes, to obtain mixing pelletizing；
Calciner, the calciner have mixing pelletizing entrance and mix products outlet, the mixing pelletizing entrance and institute
It states the outlet of mixing pelletizing to be connected, and suitable for by mixing pelletizing progress calcination process, to obtain containing granulated iron and tailings
Mix products；
Separator, the separator have mix products entrance, granulated iron outlet and tailings outlet, the mix products entrance
It is connected with mix products outlet, and suitable for the mix products of the granulated iron contained and tailings are carried out separating treatment, with
Just granulated iron and tailings are respectively obtained；
Acidleach device, the acidleach device have tailings entrance, hydrochloric acid entrance, the outlet of titaniferous leached mud and go out containing liquid after scandium leaching
Mouthful, the tailings entrance is connected with tailings outlet, and suitable for the tailings and hydrochloric acid are carried out acidleach processing, to obtain
Titaniferous leached mud and containing scandium leach after liquid；And
Titanium device is carried, the titanium device that carries is connected with titaniferous leached mud outlet, and suitable for carrying out the titaniferous leached mud
Propose titanium processing.
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| CN107043857A (en) * | 2017-03-24 | 2017-08-15 | 江苏省冶金设计院有限公司 | Handle the System and method for of tailings in vanadium extraction and copper ashes |
| CN107058744B (en) * | 2017-04-21 | 2018-07-27 | 长沙资生环保科技有限公司 | A kind of method of red mud synthetical recovery useful metal |
| CN107267757A (en) * | 2017-05-23 | 2017-10-20 | 江苏省冶金设计院有限公司 | A kind of method for handling titaniferous red mud |
| CN114873900B (en) * | 2022-05-31 | 2023-10-03 | 湖南平安环保股份有限公司 | Advanced dewatering treatment process for comprehensively utilizing red mud in municipal sludge conditioning |
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| CN102936650B (en) * | 2012-11-29 | 2014-04-02 | 北京科技大学 | Method for comprehensively utilizing red mud and high-phosphorus iron ore |
| CN103898331A (en) * | 2014-03-28 | 2014-07-02 | 中国铝业股份有限公司 | Method for comprehensive recovery of tantalum and niobium from red mud |
| CN103898330B (en) * | 2014-03-28 | 2016-04-20 | 中国铝业股份有限公司 | The method of the valuable metal such as comprehensive recovery of iron, aluminium, scandium, titanium, vanadium from red mud |
| CN204999946U (en) * | 2015-08-04 | 2016-01-27 | 江苏省冶金设计院有限公司 | System for recovery valuable metal in follow red mud |
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