CN204873879U - System for utilize red mud preparation carbonyl iron powder - Google Patents
System for utilize red mud preparation carbonyl iron powder Download PDFInfo
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- CN204873879U CN204873879U CN201520580525.7U CN201520580525U CN204873879U CN 204873879 U CN204873879 U CN 204873879U CN 201520580525 U CN201520580525 U CN 201520580525U CN 204873879 U CN204873879 U CN 204873879U
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Abstract
The utility model discloses a system for utilize red mud preparation carbonyl iron powder, include: mix and to make the football shirt and put, have red mud entry, sulphur coal entry, additive entry and mix the pelletizing export, return to the original condition or shape - melt the branch device, have mixed pelletizing entry, contain export of sulphur molten iron and tailings export, the clamp dog device has including sulphur molten iron entry and contains the export of sulphur iron plate, the carbonyl synthesis device has the carbon monoxide entry, contains sulphur iron plate entry and gaseous state mixture outlet, condensing equipment has gaseous mixture entry, the export of liquid carbonyl iron and carbon monoxide export, and the gaseous mixture entry links to each other with gaseous state mixture outlet, decomposition device has liquid carbonyl iron entry, the export of carbonyl iron powder and the export of the 2nd carbon monoxide, and liquid carbonyl iron entry and the export of liquid carbonyl iron link to each other. This system can realize effective utilization of red mud to can obtain high added value's carbonyl iron powder, thus fundamentally solve this kind of industrial waste of red mud utilization ratio low with a difficult problem of storing up for a long time.
Description
Technical field
The utility model belongs to metallurgical technology field, and specifically, the utility model relates to a kind of system utilizing red mud to prepare carbonyl iron dust.
Background technology
Red mud is the waste residue that aluminum oxide produces in process of production, because taking on a red color containing a large amount of ferric oxide, therefore is called as red mud.Red mud is one of more unmanageable solid waste of field of metallurgy, and contaminative is very strong.And often produce one ton of aluminum oxide, approximately produce red mud 0.8 ~ 1.5 ton.China is alumina producing big country, within 2009, produces 2,378 ten thousand tons, aluminum oxide, accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation.Current China red mud comprehensive utilization ratio is only 4%, and accumulation volume of cargo in storage reaches 200,000,000 tons, per tonly will spend storage expense about 50 yuan every year.Along with the reduction gradually of growth and the bauxite grade year by year of China's aluminum oxide output, the year generation of red mud also will constantly increase, and expect 2015, and red mud adds up volume of cargo in storage will reach 3.5 hundred million tons.Red mud is stored up in a large number, both land occupation, and waste resource, easily causes environmental pollution and potential safety hazard again.Red mud comprehensive utilization is the fundamental policy solving environmental pollution and potential safety hazard, the only way of Ye Shi China aluminum i ndustry sustainable development.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is to propose a kind of system utilizing red mud to prepare carbonyl iron dust, this system can realize effective utilization of red mud, and the carbonyl iron dust of high added value can be obtained, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time.
In one of the present utility model, the utility model proposes a kind of system utilizing red mud to prepare carbonyl iron dust, according to embodiment of the present utility model, this system comprises:
Mixed pelletizing device, described mixed pelletizing device has red mud entrance, high sulphur coal entrance, additive entrance and the outlet of mixing pelletizing, and is suitable for red mud, high sulphur coal and additive to carry out mixed pelletizing, to obtain mixing pelletizing;
Reduction-molten separating device, described reduction-molten separating device has mixing pelletizing entrance, the outlet of sulfur-bearing molten iron and tailings outlet, described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing, and be suitable for described mixing pelletizing to carry out reducing-melt divisional processing, to obtain sulfur-bearing molten iron and tailings;
Clamp dog device, described clamp dog device has sulfur-bearing molten iron entrance and the outlet of sulfur-bearing iron block, and described sulfur-bearing molten iron entrance exports with described sulfur-bearing molten iron and is connected, and is suitable for described sulfur-bearing molten iron being carried out clamp dog process, to obtain sulfur-bearing iron block;
Oxo process device, described oxo process device has carbon monoxide inlet, sulfur-bearing iron block entrance and gaseous state mixture outlet, described sulfur-bearing iron block entrance is connected with described sulfur-bearing iron block outlet, and described sulfur-bearing iron block is contacted with carbon monoxide, to obtain the gaseous mixture containing iron carbonyl and carbon monoxide;
Condensing works, described condensing works has gaseous mixture entrance, the outlet of liquid iron carbonyl and the outlet of the first carbon monoxide, described gaseous mixture entrance exports with described gaseous mixture and is connected, and be suitable for the described gaseous mixture containing iron carbonyl and carbon monoxide to carry out condensation process, to obtain liquid iron carbonyl and the first carbon monoxide; And
Decomposer, described decomposer has liquid iron carbonyl entrance, carbonyl iron dust outlet and the outlet of the second carbon monoxide, described liquid iron carbonyl entrance is connected with described liquid iron carbonyl outlet, and be suitable for described liquid iron carbonyl to carry out disaggregating treatment, to obtain carbonyl iron dust and the second carbon monoxide respectively.
Thus, effective utilization of red mud can be realized according to the system utilizing red mud to prepare carbonyl iron dust of the utility model embodiment, and the carbonyl iron dust of high added value can be obtained, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time.
In addition, following additional technical characteristic can also be had according to the system utilizing red mud to prepare carbonyl iron dust of the utility model above-described embodiment:
Optional, described first carbon monoxide outlet is connected with described carbon monoxide inlet, and is suitable for that described first carbon monoxide is back to described oxo process device and contacts with described sulfur-bearing iron block.Thus, carbon monoxide cycle utilization ratio can be significantly improved.
Optional, described second carbon monoxide outlet is connected with described carbon monoxide inlet, and is suitable for that described second carbon monoxide is back to described oxo process device and contacts with described sulfur-bearing iron block.Thus, carbon monoxide cycle utilization ratio can be improved further.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 prepares the system architecture schematic diagram of carbonyl iron dust according to the red mud that utilizes of the utility model embodiment;
Fig. 2 prepares the system architecture schematic diagram of carbonyl iron dust according to the red mud that utilizes of another embodiment of the utility model;
Fig. 3 prepares the system architecture schematic diagram of carbonyl iron dust according to the red mud that utilizes of another embodiment of the utility model
Fig. 4 utilizes red mud to prepare the method flow schematic diagram of carbonyl iron dust according to the system implementation utilizing red mud to prepare carbonyl iron dust of the utility model embodiment;
Fig. 5 utilizes red mud to prepare the method flow schematic diagram of carbonyl iron dust according to the system implementation utilizing red mud to prepare carbonyl iron dust of another embodiment of the utility model;
Fig. 6 utilizes red mud to prepare the method flow schematic diagram of carbonyl iron dust according to the system implementation utilizing red mud to prepare carbonyl iron dust of another embodiment of the utility model.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In one of the present utility model, the utility model proposes a kind of system utilizing red mud to prepare carbonyl iron dust.According to embodiment of the present utility model, this system comprises: mixed pelletizing device, described mixed pelletizing device has red mud entrance, high sulphur coal entrance, additive entrance and the outlet of mixing pelletizing, and is suitable for red mud, high sulphur coal and additive to carry out mixed pelletizing, to obtain mixing pelletizing; Reduction-molten separating device, described reduction-molten separating device has mixing pelletizing entrance, the outlet of sulfur-bearing molten iron and tailings outlet, described mixing pelletizing entrance is connected with the outlet of described mixing pelletizing, and be suitable for described mixing pelletizing to carry out reducing-melt divisional processing, to obtain sulfur-bearing molten iron and tailings; Clamp dog device, described clamp dog device has sulfur-bearing molten iron entrance and the outlet of sulfur-bearing iron block, and described sulfur-bearing molten iron entrance exports with described sulfur-bearing molten iron and is connected, and is suitable for described sulfur-bearing molten iron being carried out clamp dog process, to obtain sulfur-bearing iron block; Oxo process device, described oxo process device has carbon monoxide inlet, sulfur-bearing iron block entrance and gaseous state mixture outlet, described sulfur-bearing iron block entrance is connected with described sulfur-bearing iron block outlet, and described sulfur-bearing iron block is contacted with carbon monoxide, to obtain the gaseous mixture containing iron carbonyl and carbon monoxide; Condensing works, described condensing works has gaseous mixture entrance, the outlet of liquid iron carbonyl and the outlet of the first carbon monoxide, described gaseous mixture entrance exports with described gaseous mixture and is connected, and be suitable for the described gaseous mixture containing iron carbonyl and carbon monoxide to carry out condensation process, to obtain liquid iron carbonyl and the first carbon monoxide; And decomposer, described decomposer has liquid iron carbonyl entrance, carbonyl iron dust outlet and the outlet of the second carbon monoxide, described liquid iron carbonyl entrance is connected with described liquid iron carbonyl outlet, and be suitable for described liquid iron carbonyl to carry out disaggregating treatment, to obtain carbonyl iron dust and the second carbon monoxide respectively.Contriver finds, this system can realize effective utilization of red mud, and adopt red mud as the raw material preparing carbonyl iron dust, significantly can reduce raw materials cost, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time, gained carbonyl iron dust has higher added value simultaneously, simultaneously by adopting high sulphur coal as reductive agent, the ferric oxide that not only can effectively reduce in red mud, and sulphur can be made to enter in molten iron by reduction-molten divisional processing to activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shorten technical process, secondly by carrying out clamp dog to gained sulfur-bearing molten iron, thus the contact area with carbon monoxide can be significantly improved, and then improve the synthetic ratio of iron carbonyl further, adopt cheap high sulphur coal as reductive agent in addition, not only effectively can reduce production cost, and sulphur wherein can be made to be applied in iron carbonyl building-up process as beneficiating ingredient, and in iron carbonyl building-up process, do not produce gaseous state sulfur-bearing thing, topsoil can not be caused.
The system utilizing red mud to prepare carbonyl iron dust below with reference to Fig. 1-3 pairs of the utility model embodiments is described in detail.According to embodiment of the present utility model, this system comprises:
Mixed pelletizing device 100: according to embodiment of the present utility model, mixed pelletizing device 100 has red mud entrance 101, high sulphur coal entrance 102, additive entrance 103 and mixing pelletizing outlet 104, and be suitable for red mud, high sulphur coal and additive to carry out mixed pelletizing, thus can obtain mixing pelletizing.Contriver finds, adopt red mud as the raw material preparing carbonyl iron dust, significantly can reduce raw materials cost, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time, gained carbonyl iron dust has higher added value simultaneously, simultaneously by adopting high sulphur coal as reductive agent, the ferric oxide that not only can effectively reduce in red mud, and sulphur can be made to enter in molten iron by reduction-molten divisional processing to activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shorten technical process, adopt cheap high sulphur coal as reductive agent in addition, not only effectively can reduce production cost, and sulphur wherein can be made to be applied in iron carbonyl building-up process as beneficiating ingredient, and in iron carbonyl building-up process, do not produce gaseous state sulfur-bearing thing, topsoil can not be caused.
According to an embodiment of the present utility model, the blending ratio of red mud, high sulphur coal and additive is also not particularly limited, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, red mud, high sulphur coal and additive can be 100:(20 ~ 50 according to mass ratio): (5 ~ 15) mix.Contriver finds, if high sulphur coal addition is too low, impact mixes the reduction effect of iron in pelletizing on the one hand, on the other hand, the sulphur content in sulfur-bearing molten iron can be caused low and affect the activity of sulfur-bearing iron block, being unfavorable for that iron carbonyl building-up reactions is carried out, if and high sulphur coal addition is too high, the technical indicator of carbonyl iron dust not only can not be provided, and high sulfur coal resource can be caused to waste, improve production cost.
According to another embodiment of the present utility model, the sulphur content in high sulphur coal is also not particularly limited, and those skilled in the art can select according to actual needs, and according to specific embodiment of the utility model, high-sulfur sulfur content of coal can higher than 2wt%.Contriver finds, adopt the high sulphur coal of the type can prepare highly active sulfur-bearing iron block, thus itself and carbon monoxide are directly contacted can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.
According to another embodiment of the present utility model, the particular type of additive is also not particularly limited, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, additive can for being selected from least one in alkalimetal oxide, an alkali metal salt, alkaline earth metal oxide and alkaline earth salt.Thus, additive, as the fusing assistant of reduction process, significantly can reduce the temperature of reduction process, thus promotes the reduction of iron.
Reduction-molten separating device 200: according to embodiment of the present utility model, reduction-molten separating device 200 has mixing pelletizing entrance 201, sulfur-bearing molten iron outlet 202 and tailings outlet 203, mixing pelletizing entrance 201 is connected with mixing pelletizing outlet 104, and be suitable for mixing pelletizing to carry out reducing-melt divisional processing, thus sulfur-bearing molten iron and tailings can be obtained.Contriver finds, sulphur can be made to enter in molten iron by reduction-molten divisional processing and activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.Concrete, the reduction-molten separating device of mixing pelletizing can be the combined apparatus of reducing apparatus and molten separating device.
According to an embodiment of the present utility model, sulfur-bearing Sulfur Content in Hot Iron content is also not particularly limited, and those skilled in the art can select according to actual needs, and according to specific embodiment of the utility model, sulfur-bearing Sulfur Content in Hot Iron content can be 2 ~ 7wt%.Contriver finds, sulfur-bearing Sulfur Content in Hot Iron content is higher, make the activity of gained sulfur-bearing iron block higher, thus be more conducive to carrying out fast of iron carbonyl building-up reactions, and iron carbonyl synthetic ratio is also higher, and comparatively prior art adds gaseous state sulfur-bearing thing and compares as catalyzer in iron carbonyl synthesis step, the utility model does not need additionally to add catalyzer, thus shorten preparation technology's flow process, but in sulfur-bearing molten iron, sulphur content is too high, and carbonyl iron dust grade can be caused to reduce.
Clamp dog device 300: according to embodiment of the present utility model, clamp dog device 300 has sulfur-bearing molten iron entrance 301 and sulfur-bearing iron block outlet 302, sulfur-bearing molten iron entrance 301 and sulfur-bearing molten iron export 202 and are connected, and are suitable for above-mentioned gained sulfur-bearing molten iron to carry out clamp dog process, thus obtain sulfur-bearing iron block.Contriver finds, by carrying out clamp dog to gained sulfur-bearing molten iron, thus can significantly improve the contact area with carbon monoxide, and then improves the synthetic ratio of iron carbonyl further.
Oxo process device 400: according to embodiment of the present utility model, oxo process device 400 has carbon monoxide inlet 401, sulfur-bearing iron block entrance 402 and gaseous state mixture outlet 403, sulfur-bearing iron block entrance 402 is connected with sulfur-bearing iron block outlet 202, and contacted with carbon monoxide by sulfur-bearing iron block, thus the gaseous mixture containing iron carbonyl and carbon monoxide can be obtained.Contriver finds, adopt fast directly the contact with carbon monoxide of highly active sulfur-bearing iron can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.
Condensing works 500: according to embodiment of the present utility model, condensing works 500 has gaseous mixture entrance 501, liquid iron carbonyl outlet 502 and the first carbon monoxide outlet 503, gaseous mixture entrance 501 and gaseous mixture export 403 and are connected, and be suitable for the gaseous mixture containing iron carbonyl and carbon monoxide to carry out condensation process, thus liquid iron carbonyl and the first carbon monoxide can be obtained.
Decomposer 600: according to embodiment of the present utility model, decomposer 600 has liquid iron carbonyl entrance 601, carbonyl iron dust outlet 602 and the second carbon monoxide outlet 603, liquid iron carbonyl entrance 601 is connected with liquid iron carbonyl outlet 502, and be suitable for liquid iron carbonyl to carry out disaggregating treatment, thus carbonyl iron dust and the second carbon monoxide can be obtained respectively.Concrete, iron carbonyl is unstable, can be decomposed into rapidly carbonyl iron dust and carbon monoxide, thus can obtain highly purified carbonyl iron dust when heating.
Effective utilization of red mud can be realized according to the system utilizing red mud to prepare carbonyl iron dust of the utility model embodiment, and adopt red mud as the raw material preparing carbonyl iron dust, significantly can reduce raw materials cost, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time, gained carbonyl iron dust has higher added value simultaneously, simultaneously by adopting high sulphur coal as reductive agent, the ferric oxide that not only can effectively reduce in red mud, and sulphur can be made to enter in molten iron by reduction-molten divisional processing to activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shorten technical process, secondly by carrying out clamp dog to gained sulfur-bearing molten iron, thus the contact area with carbon monoxide can be significantly improved, and then improve the synthetic ratio of iron carbonyl further, adopt cheap high sulphur coal as reductive agent in addition, not only effectively can reduce production cost, and sulphur wherein can be made to be applied in iron carbonyl building-up process as beneficiating ingredient, and in iron carbonyl building-up process, do not produce gaseous state sulfur-bearing thing, topsoil can not be caused.
With reference to figure 2, according to embodiment of the present utility model, the first carbon monoxide outlet 503 is connected with carbon monoxide inlet 401, and is suitable for separating obtained for condensing works 500 first carbon monoxide to be back in oxo process device 400 to continue to react with sulfur-bearing iron block.Thus, carbon monoxide cycle utilization ratio can be significantly improved.
With reference to figure 3, according to embodiment of the present utility model, the second carbon monoxide outlet 603 is connected with carbon monoxide inlet 401, and is suitable for decomposer 600 to decompose the second carbon monoxide obtained and returns oxo process device 400 and contact with sulfur-bearing iron block and continue to react.Thus, carbon monoxide cycle utilization ratio can be improved further.
Conveniently understand, below with reference to Fig. 4-6, the method adopting the system implementation utilizing red mud to prepare carbonyl iron dust of the utility model embodiment to utilize red mud to prepare carbonyl iron dust is described in detail.According to embodiment of the present utility model, the method comprises:
S100: red mud, high sulphur coal and additive are carried out mixed pelletizing
According to embodiment of the present utility model, red mud, high sulphur coal and additive are carried out mixed pelletizing, thus can obtain mixing pelletizing.Contriver finds, adopt red mud as the raw material preparing carbonyl iron dust, significantly can reduce raw materials cost, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time, gained carbonyl iron dust has higher added value simultaneously, simultaneously by adopting high sulphur coal as reductive agent, the ferric oxide that not only can effectively reduce in red mud, and sulphur can be made to enter in molten iron by reduction-molten divisional processing to activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shorten technical process, adopt cheap high sulphur coal as reductive agent in addition, not only effectively can reduce production cost, and sulphur wherein can be made to be applied in iron carbonyl building-up process as beneficiating ingredient, and in iron carbonyl building-up process, do not produce gaseous state sulfur-bearing thing, topsoil can not be caused.
According to an embodiment of the present utility model, the blending ratio of red mud, high sulphur coal and additive is also not particularly limited, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, red mud, high sulphur coal and additive can be 100:(20 ~ 50 according to mass ratio): (5 ~ 15) mix.Contriver finds, if high sulphur coal addition is too low, impact mixes the reduction effect of iron in pelletizing on the one hand, on the other hand, the sulphur content in sulfur-bearing molten iron can be caused low and affect the activity of sulfur-bearing iron block, being unfavorable for that iron carbonyl building-up reactions is carried out, if and high sulphur coal addition is too high, the technical indicator of carbonyl iron dust not only can not be provided, and high sulfur coal resource can be caused to waste, improve production cost.
According to another embodiment of the present utility model, the sulphur content in high sulphur coal is also not particularly limited, and those skilled in the art can select according to actual needs, and according to specific embodiment of the utility model, high-sulfur sulfur content of coal can higher than 2wt%.Contriver finds, adopt the high sulphur coal of the type can prepare highly active sulfur-bearing iron block, thus itself and carbon monoxide are directly contacted can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.
According to another embodiment of the present utility model, the particular type of additive is also not particularly limited, those skilled in the art can select according to actual needs, according to specific embodiment of the utility model, additive can for being selected from least one in alkalimetal oxide, an alkali metal salt, alkaline earth metal oxide and alkaline earth salt.Thus, additive, as the fusing assistant of reduction process, significantly can reduce the temperature of reduction process, thus promotes the reduction of iron.
S200: mixing pelletizing is carried out reducing-melt divisional processing
According to embodiment of the present utility model, mixing pelletizing is carried out reducing-melt divisional processing, thus sulfur-bearing molten iron and tailings can be obtained.Contriver finds, sulphur can be made to enter in molten iron by reduction-molten divisional processing and activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.Concrete, the reduction-molten separating device of mixing pelletizing can adopt the combined apparatus of reducing apparatus and molten separating device to carry out.
According to an embodiment of the present utility model, sulfur-bearing Sulfur Content in Hot Iron content is also not particularly limited, and those skilled in the art can select according to actual needs, and according to specific embodiment of the utility model, sulfur-bearing Sulfur Content in Hot Iron content can be 2 ~ 7wt%.Contriver finds, sulfur-bearing Sulfur Content in Hot Iron content is higher, make the activity of gained sulfur-bearing iron block higher, thus be more conducive to carrying out fast of iron carbonyl building-up reactions, and iron carbonyl synthetic ratio is also higher, and comparatively prior art adds gaseous state sulfur-bearing thing and compares as catalyzer in iron carbonyl synthesis step, the utility model does not need additionally to add catalyzer, thus shorten preparation technology's flow process, but in sulfur-bearing molten iron, sulphur content is too high, and carbonyl iron dust grade can be caused to reduce.
S300: sulfur-bearing molten iron is carried out clamp dog process
According to embodiment of the present utility model, above-mentioned gained sulfur-bearing molten iron is carried out clamp dog process, thus obtains sulfur-bearing iron block.Contriver finds, by carrying out clamp dog to gained sulfur-bearing molten iron, thus can significantly improve the contact area with carbon monoxide, and then improves the synthetic ratio of iron carbonyl further.
S400: sulfur-bearing iron block is contacted with carbon monoxide
According to embodiment of the present utility model, sulfur-bearing iron block is contacted with carbon monoxide, thus the gaseous mixture containing iron carbonyl and carbon monoxide can be obtained.Contriver finds, adopt fast directly the contact with carbon monoxide of highly active sulfur-bearing iron can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shortens technical process.
S500: the gaseous mixture containing iron carbonyl and carbon monoxide is carried out condensation process
According to embodiment of the present utility model, the gaseous mixture containing iron carbonyl and carbon monoxide is carried out condensation process, thus liquid iron carbonyl and the first carbon monoxide can be obtained.
S600: liquid iron carbonyl is carried out disaggregating treatment
According to embodiment of the present utility model, liquid iron carbonyl is carried out disaggregating treatment, thus carbonyl iron dust and the second carbon monoxide can be obtained respectively.Concrete, iron carbonyl is unstable, can be decomposed into rapidly carbonyl iron dust and carbon monoxide, thus can obtain highly purified carbonyl iron dust when heating.
The method utilizing red mud to prepare carbonyl iron dust according to the system implementation utilizing red mud to prepare carbonyl iron dust of the utility model embodiment can realize effective utilization of red mud, and adopt red mud as the raw material preparing carbonyl iron dust, significantly can reduce raw materials cost, thus fundamentally solve the difficult problem that this trade waste of red mud utilization ratio is low and store up for a long time, gained carbonyl iron dust has higher added value simultaneously, simultaneously by adopting high sulphur coal as reductive agent, the ferric oxide that not only can effectively reduce in red mud, and sulphur can be made to enter in molten iron by reduction-molten divisional processing to activate iron, namely highly active sulfur-bearing molten iron is obtained, thus after clamp dog, make itself and carbon monoxide directly contact can react generation iron carbonyl, and iron carbonyl synthetic ratio is higher, compared with prior art, the utility model does not need to add catalyzer in iron carbonyl building-up process, thus shorten technical process, secondly by carrying out clamp dog to gained sulfur-bearing molten iron, thus the contact area with carbon monoxide can be significantly improved, and then improve the synthetic ratio of iron carbonyl further, adopt cheap high sulphur coal as reductive agent in addition, not only effectively can reduce production cost, and sulphur wherein can be made to be applied in iron carbonyl building-up process as beneficiating ingredient, and in iron carbonyl building-up process, do not produce gaseous state sulfur-bearing thing, topsoil can not be caused.
With reference to figure 5, comprise further according to the method that the system implementation utilizing red mud to prepare carbonyl iron dust of the utility model embodiment utilizes red mud to prepare carbonyl iron dust:
S700: the first carbon monoxide is returned S400 and contacts with sulfur-bearing iron block
According to embodiment of the present utility model, S500 condensation separation gained first carbon monoxide is back to S400 and contacts with sulfur-bearing iron block, thus carbon monoxide cycle utilization ratio can be significantly improved.
With reference to figure 6, comprise further according to the method that the system implementation utilizing red mud to prepare carbonyl iron dust of the utility model embodiment utilizes red mud to prepare carbonyl iron dust:
S800: the second carbon monoxide is returned S400 and contacts with sulfur-bearing iron block
According to embodiment of the present utility model, S600 is decomposed gained second carbon monoxide and be back to S400 and contact with sulfur-bearing iron block, thus carbon monoxide cycle utilization ratio can be improved further.
Below with reference to specific embodiment, be described the utility model, it should be noted that, these embodiments are only descriptive, and limit the utility model never in any form.
Embodiment 1
By red mud, high sulphur coal, ball processed after Wingdale mixing is also dried, wherein, red mud, the mixing quality of high sulphur coal and Wingdale is than being 100:25:15, dried mixing pelletizing carries out reducing-melt divisional processing, obtain sulfur-bearing molten iron (sulphur content is 3.2wt%), then gained sulfur-bearing molten iron is carried out clamp dog, and using gained sulfur-bearing iron block stored dry as iron carbonyl raw material, then sulfur-bearing iron block CO counter current contact generation oxonation is generated the gaseous mixture containing iron carbonyl and carbon monoxide, gaseous mixture containing iron carbonyl gaseous state and carbon monoxide is carried out condensation process, obtain liquid iron carbonyl and carbon monoxide, carbon monoxide is returned to contact with sulfur-bearing iron block and continue to react, finally the liquid iron carbonyl obtained is carried out disaggregating treatment, obtaining Iron grade is 99.12wt% carbonyl iron dust, wherein major impurity is C and N.
Embodiment 2
By red mud, high sulphur coal, ball processed after Wingdale mixing is also dried, wherein, red mud, the mixing quality of high sulphur coal and Wingdale is than being 100:30:10, dried mixing pelletizing carries out reducing-melt divisional processing, obtain sulfur-bearing molten iron (sulphur content is 2.4wt%), then gained sulfur-bearing molten iron is carried out clamp dog, and using gained sulfur-bearing iron block stored dry as iron carbonyl raw material, then sulfur-bearing iron block CO counter current contact generation oxonation is generated the gaseous mixture containing iron carbonyl and carbon monoxide, gaseous mixture containing iron carbonyl gaseous state and carbon monoxide is carried out condensation process, obtain liquid iron carbonyl and carbon monoxide, carbon monoxide is returned to contact with sulfur-bearing iron block and continue to react, finally the liquid iron carbonyl obtained is carried out disaggregating treatment, obtaining Iron grade is 99.36wt% carbonyl iron dust, wherein major impurity is C and N.
Embodiment 3
By red mud, high sulphur coal, ball processed after Wingdale mixing is also dried, wherein, red mud, the mixing quality of high sulphur coal and Wingdale is than being 100:45:5, dried mixing pelletizing carries out reducing-melt divisional processing, obtain sulfur-bearing molten iron (sulphur content is 5.1wt%), then gained sulfur-bearing molten iron is carried out clamp dog, and using gained sulfur-bearing iron block stored dry as iron carbonyl raw material, then sulfur-bearing iron block CO counter current contact generation oxonation is generated the gaseous mixture containing iron carbonyl and carbon monoxide, gaseous mixture containing iron carbonyl gaseous state and carbon monoxide is carried out condensation process, obtain liquid iron carbonyl and carbon monoxide, carbon monoxide is returned to contact with sulfur-bearing iron block and continue to react, finally the liquid iron carbonyl obtained is carried out disaggregating treatment, obtaining Iron grade is 99.27wt% carbonyl iron dust, wherein major impurity is C and N.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (3)
1. utilize red mud to prepare a system for carbonyl iron dust, it is characterized in that, comprising:
Mixed pelletizing device, described mixed pelletizing device has red mud entrance, high sulphur coal entrance, additive entrance and the outlet of mixing pelletizing;
Reduction-molten separating device, described reduction-molten separating device has mixing pelletizing entrance, the outlet of sulfur-bearing molten iron and tailings outlet, and described mixing pelletizing entrance is connected with described mixing pelletizing outlet;
Clamp dog device, described clamp dog device has sulfur-bearing molten iron entrance and the outlet of sulfur-bearing iron block, and described sulfur-bearing molten iron entrance exports with described sulfur-bearing molten iron and is connected;
Oxo process device, described oxo process device has carbon monoxide inlet, sulfur-bearing iron block entrance and gaseous state mixture outlet, and described sulfur-bearing iron block entrance is connected with described sulfur-bearing iron block outlet;
Condensing works, described condensing works has gaseous mixture entrance, the outlet of liquid iron carbonyl and the outlet of the first carbon monoxide, and described gaseous mixture entrance exports with described gaseous mixture and is connected; And
Decomposer, described decomposer has liquid iron carbonyl entrance, carbonyl iron dust outlet and the outlet of the second carbon monoxide, and described liquid iron carbonyl entrance is connected with described liquid iron carbonyl outlet.
2. the system utilizing red mud to prepare carbonyl iron dust according to claim 1, is characterized in that, described first carbon monoxide outlet is connected with described carbon monoxide inlet.
3. the system utilizing red mud to prepare carbonyl iron dust according to claim 1, is characterized in that, described second carbon monoxide outlet is connected with described carbon monoxide inlet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174319A (en) * | 2015-08-04 | 2015-12-23 | 江苏省冶金设计院有限公司 | Method and system for preparation of carbonyl iron powder from red mud |
| CN105671336A (en) * | 2016-03-31 | 2016-06-15 | 江苏省冶金设计院有限公司 | Method and system for utilizing copper tailings comprehensively |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174319A (en) * | 2015-08-04 | 2015-12-23 | 江苏省冶金设计院有限公司 | Method and system for preparation of carbonyl iron powder from red mud |
| CN105671336A (en) * | 2016-03-31 | 2016-06-15 | 江苏省冶金设计院有限公司 | Method and system for utilizing copper tailings comprehensively |
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