CN205907327U - System for recovering iron in follow red mud - Google Patents
System for recovering iron in follow red mud Download PDFInfo
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- CN205907327U CN205907327U CN201620825571.3U CN201620825571U CN205907327U CN 205907327 U CN205907327 U CN 205907327U CN 201620825571 U CN201620825571 U CN 201620825571U CN 205907327 U CN205907327 U CN 205907327U
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Abstract
The utility model discloses a system for recovering iron in follow red mud. This system includes: the fine grinding device, the fine grinding device has red mud powder inlet, carbon back material powder inlet and mixtures fine powder outlet, original mounting still, still original mounting has mixtures farine entry, gos back crude gas vent pipe, contains alkali exhanst gas outlet and the export of dealkalize material, mixtures farine entry with mixtures fine powder outlet links to each other, cooling device, cooling device has dealkalize matter entrance and the export of cooling material, dealkalize matter entrance with the export of dealkalize material links to each other, and grinding magnetic separation device, the grinding magnetic separation device has cooling matter entrance, iron powder export and arranges the cinder notch, the cooling matter entrance with the export of cooling material links to each other. Utilize the recovering iron from red mud of this system, simple process, with low costs, the rate of recovery of iron is high, the iron of the iron powder of recovery of high grade, the content of sulphur is low to the alkali content of tailing is low.
Description
Technical field
This utility model is related to the system from recovering iron from red mud.
Background technology
Red mud is the topmost solid slag producing in aluminum oxide industry production process, and at present, domestic red mud is arranged every year
High-volume more than 30,000,000 tons, in addition to small part is applied to the purposes such as manufacture of cement, brickmaking, outdoor the building a dam of most wet method is stored up, existing
Modern red mud accumulation is stored up more than 3.5 hundred million tons.In cement building material field, cement consumption state of China is about 2,200,000,000 tons within 2015,
Market is very huge, but the key constraints that restriction red mud is applied in cement at present are that in red mud, alkali content is too high.Existing
Red mud dealkalization method mainly have lime method, normal pressure suspension and carbonation method, WATER-WASHING METHOD, acid wash.Calx hydro-thermal method dealkalize is in height
Add Calx under pressure or low pressure, be allowed to red mud, lattice substitution reaction occur, using ca2+Replace the na in red mud+, na+With molten
Liquid dissolution, thus reach dealkalize purpose.The method dealkalize effect is significant, but there is lime consumption greatly in dealkalize process, cost height etc.
Problem.Acid leaching process is directly to carry out dealkalize with the strong acid such as sulphuric acid, hydrochloric acid leaching red mud, and it is poor that the method has an operating environment, useless
Liquid measure is big and easily causes secondary pollution problems.Dealkalize high cost leads to enterprise and client to utilize the wish of red mud relatively low, merely
Dealkalize or reclaim alkali can not cost-effective utilization red mud, thus limiting application in terms of cement for the red mud.
Although containing fe, si, al, ca, ti, sc, nb, ta, zr, th and u etc. in red mud, extract to from Bayer process red mud
The research great majority of the rare elements such as ti, sc remain in laboratory stage, are not carried out industrialized level, and it is multiple to there is technique
Miscellaneous, relatively costly the problems such as, the mode mainly red mud being applied to ironmaking field at present selects ferrum, according to middle aluminium net statistical data,
Red mud selects ferrum utilization to account for using total amount 56.6% within 2013.This Land use systems only reclaims ferrum element, and iron recovery 20～<
30%, being only applicable to part has the red mud of magnetization characteristics.Because in red mud iron powder, potassium sodium exists, red mud iron powder allocates blast furnace Haematite into
In powder, ratio is less than 20%.Due to red mud select ferrum choosing than low, still have a large amount of red mud tailings, for China's storing up in terms of hundred million
For amount, the amount of dissolving is relatively small.
Thus, require study from the system of recovering iron from red mud.
Utility model content
This utility model is intended at least solve one of technical problem present in prior art.For this reason, it is of the present utility model
One purpose is to propose a kind of system from recovering iron from red mud, and this system controls powder particles by fine grinding device, makes powder
Material fully mixing is levigate, and reduction apparatus realize iron oxides reduction in red mud powder under reducing atmosphere and cryogenic conditions
Remove with alkali metal reduction, thus, efficiently solve the low problem with high energy consumption of red mud pyrogenic process dealkalize rate.And it is straight for coal base
Connect the high feature of sulfur content in reduced iron, after dealkalize material is cooled down, carry out mill ore magnetic selection, the metallic iron of output low sulfur content again
Powder, solves the too high technical barrier of sulfur content in red mud iron powder in existing process.
According to one side of the present utility model, this utility model provides a kind of system from recovering iron from red mud.Root
According to embodiment of the present utility model, this system includes: fine grinding device, and described fine grinding device has red mud powdering inlet, carbon-based thing
Material powdering inlet and the outlet of mixed material fine powder；Reduction apparatus, described reduction apparatus have mixed material fine powder entrance, also Primordial Qi
Breather line, exhanst gas outlet containing alkali and dealkalize material outlet, described mixed material fine powder entrance and described mixed material fine powder go out
Mouth is connected；Chiller, described chiller have dealkalize material inlet and cooling material outlet, described dealkalize material inlet with
Described dealkalize material outlet is connected；And mill ore magnetic selection device, described mill ore magnetic selection device has cooling material inlet, iron powder goes out
Mouth and slag-drip opening, described cooling material inlet is connected with described cooling material outlet.
According to this utility model embodiment from the system of recovering iron from red mud, fine grinding is carried out to raw material by fine grinding device
Process and profit mill processes effective control powder particles, so that powder is fully mixed levigate, and reduction apparatus have also Primordial Qi breather
Road, makes raw material carry out reduction treatment under reducing atmosphere and cryogenic conditions, realizes iron oxides reduction and alkali in red mud powder
Metal reduction removing, thus, efficiently solve the low problem with high energy consumption of red mud pyrogenic process dealkalize rate.And for coal base directly also
The high feature of sulfur content in former ferrum, carries out mill ore magnetic selection through mill ore magnetic selection device after cooled for dealkalize material device is cooled down again,
The metal iron powder of output low sulfur content, thus, efficiently solve the technology that in red mud iron powder in existing process, sulfur content is too high difficult
Topic.Thus, using system of the present utility model from recovering iron from red mud, the structure of system is simple, low cost, the response rate of ferrum
Height, the grade reclaiming the ferrum of iron powder obtaining is high, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing cement.
Optionally, this system further includes: red mud breaker, and described red mud breaker has red mud entrance and red
Mud dust outlet, described red mud dust outlet is connected with described red mud powdering inlet；Carbon-based material crushing device, described carbon-based thing
Material breaker has carbon-based material inlet and the outlet of carbon-based material powders, described carbon-based material powders outlet and described carbon-based thing
Material powdering inlet is connected.
Optionally, described reduction apparatus are pipe type calciner.
Optionally, described reduction apparatus carry out reduction treatment temperature be 800-1150 degree Celsius.
Optionally, described chiller is water-cooled shell type chiller.
Additional aspect of the present utility model and advantage will be set forth in part in the description, partly will be from explained below
In become obvious, or recognized by practice of the present utility model.
Brief description
Above-mentioned and/or additional aspect of the present utility model and advantage will from reference to the description to embodiment for the accompanying drawings below
Become obvious and easy to understand, wherein:
Fig. 1 shows the schematic flow sheet of the method from recovering iron from red mud according to one embodiment of this utility model；
Fig. 2 shows the structural representation of the system from recovering iron from red mud according to one embodiment of this utility model；
Fig. 3 shows the structural representation of the system according to another embodiment of this utility model from recovering iron from red mud
Figure.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of described embodiment is shown in the drawings, wherein ad initio
To the element that same or similar label represents same or similar element or has same or like function eventually.Below by ginseng
The embodiment examining Description of Drawings is exemplary, is only used for explaining this utility model, and it is not intended that to of the present utility model
Limit.
Of the present utility model description in, term " longitudinal ", " horizontal ", " on ", D score, "front", "rear", "left", "right",
The orientation of instruction such as " vertical ", " level ", " top ", " bottom " or position relationship are based on orientation shown in the drawings or position relationship,
It is for only for ease of description this utility model rather than require this utility model must be with specific azimuth configuration and operation, therefore
It is not intended that to restriction of the present utility model.
It should be noted that term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint phase
To importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", " second " feature permissible
Express or implicitly include one or more this feature.Further, in description of the present utility model, unless otherwise
Illustrate, " multiple " are meant that two or more.
System from recovering iron from red mud
According to another aspect of the present utility model, this utility model provides a kind of system from recovering iron from red mud.Ginseng
Examine Fig. 2, according to embodiment of the present utility model, explain to from the system of recovering iron from red mud, this system includes: be thin
Mill apparatus 100, reduction apparatus 200, chiller 300 and mill ore magnetic selection device 400.Below with reference to Fig. 2, each device is solved
Release explanation:
Fine grinding device 100: according to embodiment of the present utility model, this fine grinding device 100 have red mud powdering inlet 101,
Carbon-based material powders entrance 102 and mixed material fine powder outlet 103.Red mud powder and carbon-based material powders are carried out by fine grinding device
Fine grinding is processed and profit mill is processed, and obtains uniform mixed material fine powder.According to some embodiments of the present utility model, mixed material
In fine powder, the mass fraction that granularity is not more than the mixed material fine powder of 0.02mm is not less than 90%.Thus, will by fine grinding device
Raw material is levigate can effectively to increase the contact area of material, and mixed material fine powder is levigate again after mixing to be not more than 0.02mm to granularity
The mass fraction of mixed material fine powder be not less than 90%, the specific surface area of mixed material can be made to reach 80m2/ more than g, makes red
Mud internal crystal framework alkali and carbon-based material powders are fully contacted, and promote the reduction volatilization of sodium, and are conducive to realizing under cryogenic
The reduction of low price iron oxides.
With reference to Fig. 3, according to embodiment of the present utility model, this system further includes: red mud breaker 500 and carbon-based
Material crushing device 600, wherein, red mud breaker 500 has red mud entrance 501 and red mud dust outlet 502, wherein, red
Mud dust outlet 502 is connected with red mud powdering inlet 101, and red mud breaker 500 is used for for red mud carrying out break process, obtains
Red mud powder；Carbon-based material crushing device 600 has carbon-based material inlet 601 and carbon-based material powders outlet 602, wherein, carbon
Base material powders outlet 602 is connected with carbon-based material powders entrance 102, and carbon-based material crushing device 600 is used for carbon-based material
Carry out break process, obtain carbon-based material powders.Thus, before entering fine grinding device, the red mud larger to particle diameter and carbon-based thing
Material carries out break process, is easy to fine grinding process and obtains the small fine powder of particle diameter, so that the time of fine grinding process and energy consumption is significantly reduced.
According to some embodiments of the present utility model, in red mud powder, granularity is not more than the matter of the red mud powder of 0.043mm
Amount fraction is not less than 85%.Thus, the granularity of red mud powder is little, is easy to obtain mixed material fine powder by moistening mill process, wherein,
The mass fraction that granularity is not more than the mixed material fine powder of 0.02mm is not less than 90%.
According to embodiment of the present utility model, in carbon-based material powders, granularity is not more than the carbon-based material powders of 0.043mm
Mass fraction be not less than 85%.Thus, the granularity of carbon-based material powders is little, is easy to process that to obtain mixed material thin by moistening mill
Powder, wherein, the mass fraction that granularity is not more than the mixed material fine powder of 0.02mm is not less than 90%.
According to some embodiments of the present utility model, red mud powder and carbon-based material powders are 1:(0.15- in mass ratio
0.4) carry out described profit mill to process.Thus, not only the reduction effect of iron oxides is good, and, be conducive to alkali-metal in pelletizing
Reduction volatilization, and then, alkali-metal removal efficiency is high, and the alkali metal content of metallized pellet is low, after effectively alleviating metallized pellet
The erosion to furnace lining for alkali metal during continuous smelting, and the low alkali mine tailing obtaining can be used for manufacture of cement.If carbon-based material powder
The addition at end is too low, is unfavorable for realizing the reduction of iron oxides in the removing of alkali and pelletizing, and the addition of carbon-based material powders
Measure too high, then production cost can increase, and affect pelletizing and subsequently grind choosing separation, increase the sulfur content in mixed material.
Reduction apparatus 200: according to embodiment of the present utility model, reduction apparatus 200 have mixed material fine powder entrance
201st, Primordial Qi breather line 202, exhanst gas outlet containing alkali 203 and dealkalize material outlet 204, wherein, mixed material fine powder entrance are gone back
201 are connected with mixed material fine powder outlet 103, and reduction apparatus are used for mixed material fine powder carries out also original place under reducing atmosphere
Reason, obtains furnace gas containing alkali and dealkalize material.Thus, in reduction treatment process, the iron oxides in red mud are in reducing atmosphere
It is reduced, and a large amount of alkali metal volatilizees under the reducing atmosphere of coal dust and escapes in flue gas, makes alkali metal content in pelletizing
Reduce.
According to embodiment of the present utility model, reduction apparatus 200 are pipe type calciner.Thus, directly utilize powder
Raw material need not be carried out pelletizing forming processes by reduction treatment, save process step, and, the reduction efficiency of pipe type calciner is high,
Dealkalize effect is good.
According to embodiment of the present utility model, also Primordial Qi contains carbon monoxide, and carbon monoxide volume fraction is more than 50%.
Thus, also in Primordial Qi, the concentration of carbon monoxide is suitable, not only promotes reduction reaction to carry out, and is prevented effectively from the gold that reduction obtains
Belong to ferrum by secondary oxidation.
According to some embodiments of the present utility model, the temperature of reduction treatment is 800-1150 degree Celsius, and the time is that 4-6 is little
When, wherein it is desired to explanation, the temperature of reduction treatment is the process gradually heating up, when reaction temperature by 800 degrees Celsius gradually
It is increased to 1150 degrees Celsius, not only the reduction effect of iron oxides is good, furthermore, it is possible to effectively remove the alkali metal in red mud.Also
The temperature of original place reason, below 1100 DEG C, only enables the reduction of iron oxides it is impossible to effectively remove alkali metal in red mud, and warm
Degree is higher than 1150 DEG C, easily causes material soft heat, increases ore grinding cost and causes the erosion of furnace lining in tube furnace.
Chiller 300: according to embodiment of the present utility model, chiller 300 has dealkalize material inlet 301 and cold
But material outlet 302, wherein, dealkalize material inlet 301 is connected with dealkalize material outlet 204, and chiller 300 is used for dealkalize
Material carries out cooling treatment, obtains cooling down material.Thus, iron powder after hot dealkalize material is easy to after secondary oxidation, be made mill select
Grade declines, and hot dealkalize material is carried out cooling treatment, is prevented effectively from dealkalize material two in follow-up mill ore magnetic selection is processed
Secondary oxidation, the grade of iron powder is higher.
According to embodiment of the present utility model, chiller is water-cooled shell type chiller.Thus, the structure letter of device
Single, good cooling results, cooling cost is low.
Mill ore magnetic selection device 400: according to embodiment of the present utility model, this mill ore magnetic selection device 400 has cooling material
Entrance 401, iron powder outlet 402 and slag-drip opening 403, wherein, cooling material inlet 401 is connected with cooling material outlet 302, this mill
Ore deposit concentration equipment 400 carries out mill ore magnetic selection process by cooling down material, obtains iron powder and tailings.Thus, the material after cooling is entered
Row mill ore magnetic selection is processed, and can effectively reduce the sulfur content in iron powder.
According to some embodiments of the present utility model, the sulfur content of iron powder is not more than 0.05 mass %.Thus, the sulfur of iron powder
Content is low, and, this utility model, by dealkalize material elder generation cooling treatment mill ore magnetic selection again, realizes low-temperature reduction coupling ore grinding magnetic
Choosing, not only desulfurized effect is good, and desulphurization cost is low.
According to some embodiments of the present utility model, the alkali metal content of tailings is not higher than 0.5 mass %.Thus, this reality
System dealkalize effect with new embodiment is good, and in tailings, alkali metal content is low, thus, tailings can be used for producing cement, realizes
Twice laid.
According to this utility model embodiment from the system of recovering iron from red mud, fine grinding is carried out to raw material by fine grinding device
Process and profit mill processes effective control powder particles, so that powder is fully mixed levigate, and reduction apparatus have also Primordial Qi breather
Road, makes raw material carry out reduction treatment under reducing atmosphere and cryogenic conditions, realizes iron oxides reduction and alkali in red mud powder
Metal reduction removing, thus, efficiently solve the low problem with high energy consumption of red mud pyrogenic process dealkalize rate.And for coal base directly also
The high feature of sulfur content in former ferrum, carries out mill ore magnetic selection through mill ore magnetic selection device after cooled for dealkalize material device is cooled down again,
The metal iron powder of output low sulfur content, thus, efficiently solve the technology that in red mud iron powder in existing process, sulfur content is too high difficult
Topic.Thus, using system of the present utility model from recovering iron from red mud, the structure of system is simple, low cost, the response rate of ferrum
Height, the grade reclaiming the ferrum of iron powder obtaining is high, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing cement.
Method from recovering iron from red mud
For the ease of understanding the aforesaid system from recovering iron from red mud, there is provided herein one kind using aforementioned system from red
The method reclaiming ferrum in mud.With reference to Fig. 1, according to embodiment of the present utility model, solve to from the method for recovering iron from red mud
Release explanation, the method includes:
S100 fine grinding is processed
According to embodiment of the present utility model, red mud powder and carbon-based material powders are utilized respectively fine grinding device and carry out carefully
Mill is processed, and then carries out moistening mill process, obtains uniform mixed material fine powder, wherein, in mixed material fine powder, granularity is not more than
The mass fraction of the mixed material fine powder of 0.02mm is not less than 90%.Thus, by can effectively increase material by levigate for raw material
Contact area, mixed material fine powder mix after again levigate to granularity be not more than 0.02mm mixed material fine powder mass fraction
It is not less than 90%, the specific surface area of mixed material can be made to reach 80m2/ more than g, makes red mud internal crystal framework alkali and carbon-based material powder
End is fully contacted, and promotes the reduction volatilization of sodium, and is conducive to realizing the reduction of low price iron oxides under cryogenic.
According to embodiment of the present utility model, in red mud powder, granularity is not more than the matter of the described red mud powder of 0.043mm
Amount fraction is not less than 85%.Thus, the granularity of red mud powder is little, is easy to obtain mixed material fine powder by moistening mill process, wherein,
The mass fraction that granularity is not more than the mixed material fine powder of 0.02mm is not less than 90%.
According to embodiment of the present utility model, in carbon-based material powders, granularity is not more than the described carbon-based material of 0.043mm
The mass fraction of powder is not less than 85%.Thus, the granularity of carbon-based material powders is little, is easy to obtain mixture by moistening mill process
Material fine powder, wherein, the mass fraction that granularity is not more than the mixed material fine powder of 0.02mm is not less than 90%.
According to some embodiments of the present utility model, red mud powder and carbon-based material powders are 1:(0.15- in mass ratio
0.4) carry out described profit mill to process.Thus, not only the reduction effect of iron oxides is good, and, be conducive to alkali-metal in pelletizing
Reduction volatilization, and then, alkali-metal removal efficiency is high, and the alkali metal content of metallized pellet is low, after effectively alleviating metallized pellet
The erosion to furnace lining for alkali metal during continuous smelting, and the low alkali mine tailing obtaining can be used for manufacture of cement.If carbon-based material powder
The addition at end is too low, is unfavorable for realizing the reduction of iron oxides in the removing of alkali and pelletizing, and the addition of carbon-based material powders
Measure too high, then production cost can increase, and affect pelletizing and subsequently grind choosing separation, increase the sulfur content in mixed material.
S200 reduction treatment
According to embodiment of the present utility model, mixed material fine powder is carried out also original place by reduction apparatus under reducing atmosphere
Reason, obtains furnace gas containing alkali and dealkalize material.Thus, in reduction treatment process, the iron oxides in red mud are in reducing atmosphere
It is reduced, and a large amount of alkali metal volatilizees under the reducing atmosphere of coal dust and escapes in flue gas, makes alkali metal content in pelletizing
Reduce.
According to embodiment of the present utility model, also Primordial Qi contains carbon monoxide, and carbon monoxide volume fraction is more than 50%.
Thus, also in Primordial Qi, the concentration of carbon monoxide is suitable, not only promotes reduction reaction to carry out, and is prevented effectively from the gold that reduction obtains
Belong to ferrum by secondary oxidation.
According to some embodiments of the present utility model, the temperature of reduction treatment is 800-1150 degree Celsius, and the time is that 4-6 is little
When, wherein it is desired to explanation, the temperature of reduction treatment is the process gradually heating up, when reaction temperature by 800 degrees Celsius gradually
It is increased to 1150 degrees Celsius, not only the reduction effect of iron oxides is good, furthermore, it is possible to effectively remove the alkali metal in red mud.Also
The temperature of original place reason, below 1100 DEG C, only enables the reduction of iron oxides it is impossible to effectively remove alkali metal in red mud, and warm
Degree is higher than 1150 DEG C, easily causes material soft heat, increases ore grinding cost and causes the erosion of furnace lining in tube furnace.
S300 cooling treatment
According to embodiment of the present utility model, dealkalize material is carried out cooling treatment by chiller, obtains cooling down material.By
This, after hot dealkalize material is easy to after secondary oxidation, be made mill select, iron powder grade declines, and hot dealkalize material is carried out at cooling
Reason, is prevented effectively from dealkalize material secondary oxidation in follow-up mill ore magnetic selection is processed, and the grade of iron powder is higher.New according to this practicality
Some embodiments of type, carry out this cooling treatment using water-cooled shell type chiller.Thus, good cooling results, cooling cost is low.
S400 mill ore magnetic selection is processed
According to embodiment of the present utility model, mill ore magnetic selection device carries out mill ore magnetic selection process by cooling down material, obtains ferrum
Powder and tailings.Thus, mill ore magnetic selection process is carried out to the material after cooling, can effectively reduce the sulfur content in iron powder.
According to some embodiments of the present utility model, the sulfur content of iron powder is not more than 0.05 mass %.Thus, the sulfur of iron powder
Content is low, and, this utility model, by dealkalize material elder generation cooling treatment mill ore magnetic selection again, realizes low-temperature reduction coupling ore grinding magnetic
Choosing, not only desulfurized effect is good, and desulphurization cost is low.
According to some embodiments of the present utility model, the alkali metal content of tailings is not higher than 0.5 mass %.Thus, this reality
Method dealkalize effect with new embodiment is good, and in tailings, alkali metal content is low, thus, tailings can be used for producing cement, realizes
Twice laid.
According to this utility model embodiment from the method for recovering iron from red mud, process and moisten mill by fine grinding and process effectively
Control powder particles, so that powder is fully mixed levigate, and carry out reduction treatment under reducing atmosphere and cryogenic conditions, realize red
Iron oxides reduction and alkali metal reduction removing in mud powder, thus, efficiently solve that red mud pyrogenic process dealkalize rate is low and high energy consumption
Problem.And for the high feature of sulfur content in coal-based direct reduction iron, dealkalize material is carried out after cooling treatment ore grinding again
Magnetic separation, the metal iron powder of output low sulfur content, thus, efficiently solve the too high skill of sulfur content in red mud iron powder in existing process
An art difficult problem.Thus, using method of the present utility model from recovering iron from red mud, technological process is simple, low cost, the response rate of ferrum
Height, the grade reclaiming the ferrum of iron powder obtaining is high, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing cement.
Below with reference to specific embodiment, this utility model is illustrated, it should be noted that these embodiments are only
Illustrative, and it is not intended that to restriction of the present utility model.
Embodiment 1
Using the method for this utility model embodiment, with coal dust as reducing agent, from recovering iron from red mud, concrete steps are such as
Under:
(1) red mud and reducing agent are finely ground to -0.043mm and account for 85%, counted for 100 weight portions with red mud, allocate 25% into
Material is carried out fine grinding it is desirable to levigate granularity accounts for 90% for -0.043mm by reducing agent again.
(2) mixed powder obtaining step (1) is positioned in pipe type calciner and is reduced, the initial temperature in reduction furnace
Spend for 800 DEG C, be raised to 1100 DEG C through two hours, be passed through the also Primordial Qi containing co and n2 in stove, wherein co concentration is 50%.
After insulation 3h, take out reduction powder.
(3) reduction powder is carried out indirect water-cooling.
(4) the reduction powder after step (3) water-cooled is carried out mill ore magnetic selection, the ore grinding time is 5min, and obtaining tfe is
91.1%th, sulfur content is 0.04% metal iron powder, na in tailings2O content is 0.89%.Thus, real using this utility model
The method applying example reclaims the grade height of the ferrum of iron powder obtaining, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing
Cement.
Embodiment 2
Using the method for this utility model embodiment, with coal dust as reducing agent, from recovering iron from red mud, concrete steps are such as
Under:
(1) red mud, reducing agent are finely ground to -0.043mm and account for 90%, counted for 100 weight portions with red mud, allocate into 25% also
Former dose, again material is carried out fine grinding it is desirable to levigate granularity accounts for 95% for -0.043mm.
(2) mixed powder obtaining step (1) is positioned in pipe type calciner and is reduced, the initial temperature in reduction furnace
Spend for 800 DEG C, be raised to 1150 DEG C through two hours, be passed through containing co and n in stove2Also Primordial Qi, wherein co concentration is 50%.
After insulation 3h, take out reduction powder.
(3) reduction powder is carried out indirect water-cooling.
(4) the reduction powder after step (3) water-cooled is carried out mill ore magnetic selection, the ore grinding time is 5min, and obtaining tfe is
92.2%th, s is 0.04% metal iron powder, and in tailings, na2o content is 0.67%.Thus, using this utility model embodiment
The grade of the ferrum of iron powder that method recovery obtains is high, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing cement.
Embodiment 3
Using the method for this utility model embodiment, with coal dust as reducing agent, from recovering iron from red mud, concrete steps are such as
Under:
(1) red mud, reducing agent are finely ground to -0.043mm and account for 90%, counted for 100 weight portions with red mud, allocate into 25% also
Former dose, again material is carried out fine grinding it is desirable to levigate granularity accounts for 95% for -0.043mm.
(2) mixed powder obtaining step (1) is positioned in pipe type calciner and is reduced, the initial temperature in reduction furnace
Spend for 800 DEG C, be raised to 1150 DEG C through two hours, be passed through containing co and n in stove2Also Primordial Qi, wherein co concentration is 30%.
After insulation 3h, take out reduction powder.
(3) reduction powder is carried out indirect water-cooling.
(4) the reduction powder after step (3) water-cooled is carried out mill ore magnetic selection, the ore grinding time is 5min, and obtaining tfe is
90.2%th, s is 0.06% metal iron powder, and in tailings, na2o content is 0.65%.Thus, using this utility model embodiment
The grade of the ferrum of iron powder that method recovery obtains is high, and the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing cement.
Embodiment 4
Using the method for this utility model embodiment, with coal dust as reducing agent, from recovering iron from red mud, concrete steps are such as
Under:
(1) red mud, reducing agent are finely ground to -0.043mm and account for 90%, counted for 100 weight portions with red mud, allocate into 15% also
Former dose, again material is carried out fine grinding it is desirable to levigate granularity accounts for 95% for -0.043mm.
(2) mixed powder obtaining step (1) is positioned in pipe type calciner and is reduced, the initial temperature in reduction furnace
Spend for 800 DEG C, be raised to 1100 DEG C through two hours, be passed through the also Primordial Qi containing co and n2 in stove, wherein co concentration is 70%.
After insulation 3h, take out reduction powder.
(3) reduction powder is carried out indirect water-cooling.
(4) the reduction powder after step (3) water-cooled is carried out mill ore magnetic selection, the ore grinding time is 5min, and obtaining tfe is
93.05%th, s is 0.03% metal iron powder, na in tailings2O content is 0.33%.Thus, using this utility model embodiment
The grade of the ferrum of iron powder that obtains of method recovery high, the content of sulfur is low, and the alkali content of mine tailing is low, can be used for producing water
Mud.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term
State and be not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or feature can be
Combine in an appropriate manner in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that:
Multiple changes, modification, replacement can be carried out to these embodiments in the case of without departing from principle of the present utility model and objective
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (5)
1. a kind of from the system of recovering iron from red mud it is characterised in that include:
Fine grinding device, described fine grinding device has red mud powdering inlet, carbon-based material powders entrance and the outlet of mixed material fine powder；
Reduction apparatus, described reduction apparatus have mixed material fine powder entrance, go back Primordial Qi breather line, exhanst gas outlet containing alkali and take off
Alkali material outlet, described mixed material fine powder entrance is connected with the outlet of described mixed material fine powder；
Chiller, described chiller has dealkalize material inlet and cooling material outlet, described dealkalize material inlet and institute
State dealkalize material outlet to be connected；And
Mill ore magnetic selection device, described mill ore magnetic selection device has cooling material inlet, iron powder outlet and slag-drip opening, described refrigerant
Material entrance is connected with described cooling material outlet.
2. according to claim 1 from the system of recovering iron from red mud it is characterised in that further including:
Red mud breaker, described red mud breaker has red mud entrance and red mud dust outlet, described red mud dust outlet
It is connected with described red mud powdering inlet；
Carbon-based material crushing device, described carbon-based material crushing device has carbon-based material inlet and the outlet of carbon-based material powders,
Described carbon-based material powders outlet is connected with described carbon-based material powders entrance.
3. according to claim 1 from the system of recovering iron from red mud it is characterised in that described reduction apparatus be tubular type roasting
Burn stove.
4. according to claim 3 from the system of recovering iron from red mud it is characterised in that described reduction apparatus are reduced
The temperature processing is 800-1150 degree Celsius.
5. according to claim 1 from the system of recovering iron from red mud it is characterised in that described chiller be water collar
Formula chiller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620825571.3U CN205907327U (en) | 2016-08-01 | 2016-08-01 | System for recovering iron in follow red mud |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620825571.3U CN205907327U (en) | 2016-08-01 | 2016-08-01 | System for recovering iron in follow red mud |
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| CN205907327U true CN205907327U (en) | 2017-01-25 |
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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 |
| CN107217134A (en) * | 2017-07-17 | 2017-09-29 | 长沙紫宸科技开发有限公司 | The equipment that the activation separation of high ferro waste residue is utilized |
-
2016
- 2016-08-01 CN CN201620825571.3U patent/CN205907327U/en not_active Expired - Fee Related
Cited By (4)
| 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 |
| CN107217134A (en) * | 2017-07-17 | 2017-09-29 | 长沙紫宸科技开发有限公司 | The equipment that the activation separation of high ferro waste residue is utilized |
| CN107217134B (en) * | 2017-07-17 | 2018-09-11 | 长沙紫宸科技开发有限公司 | The equipment that the activation separation of high ferro waste residue utilizes |
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