CN107699706A - A kind of copper-smelting thermal slag iron-extracting process - Google Patents
A kind of copper-smelting thermal slag iron-extracting process Download PDFInfo
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- CN107699706A CN107699706A CN201710990118.7A CN201710990118A CN107699706A CN 107699706 A CN107699706 A CN 107699706A CN 201710990118 A CN201710990118 A CN 201710990118A CN 107699706 A CN107699706 A CN 107699706A
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- iron
- high temperature
- particulate matter
- slag
- clinker
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of copper-smelting thermal slag iron-extracting process, comprise the following steps：S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, then the fine slag fully smashed is sent into sawtooth pulsation jig, particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, the particulate matter that will be greater than 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 8 15 powerful electromagnetic iron plates are provided with below shaking table, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4, S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation and operate 36 times.Present inventive concept is novel, the reaction time is short, productivity ratio is high, production cost is low, adaptability to raw material is strong, treating capacity is big, environment-friendly, economic well-being of workers and staff is high, can effectively solve environmental pollution, heat energy high efficiente callback Utilizing question.
Description
Technical field
The present invention relates to non-blast furnace ironmaking and technical field of resource comprehensive utilization, more particularly to a kind of copper-smelting thermal slag
Iron-extracting process.
Background technology
Blast-furnace iron-making method is the main method of current production steel.By long-term development, blast-furnace technique very into
It is ripe.The shortcomings that blast-furnace iron-making method is the strong depend-ence to metallurgical coke, and increasingly poor with coke resource, the price of metallurgical coke is got over
Come higher, and the cheap mill coal resource of rich reserves can not make full use of in ironmaking production.And as blast furnace is strengthened
The raising of melting technique, gross contamination emission is constantly improve, is one of domestic pollution discharge main source.
In order to change the reinforcement of predicament that blast furnace ironmaking faces and environmental protection policy, various forms of non-blast furnaces refinings are formd
Iron, at present, form to be reduced directly the modernization non-blast furnace ironmaking industrial system with melting and reducing.
Direct-reduction process is limited to using gas, liquid fuel or mill coal as raw material, to be the softening temperature in iron ore in solid-state
The method that reduction obtains metallic iron is carried out below degree.This temperature is low, and product is carbon containing low in porous, does not exclude gangue
Metal iron product, referred to as DRI
Melting and reducing rule carries out ferriferous oxide reduction using mill coal as the energy under high temperature melt, and slag iron can be kept completely separate, its
Have the following advantages that：1, which can handle difficulty, selects low-quality iron ore, iron content grandidierite, special ore, is the important hand of comprehensive utilization of resources
Section, raw material resources range of choice are wide；2 flows are short, and speed is fast, and production cost is low, small investment；3 environmental pollutions are small, more wiper ring
Protect.
Blast furnace slag be in blast furnace reduction process caused by, be integrated iron and steel works the first solid waste, 2015, always
Amount has reached hundred million tons of 3-4, is metallurgical intermediate products, not only contains reducing substances, such as coke, coal dust, carbon, carbon dust,
And contain high level CaO, MgO, SiO2Deng flux for metallurgy and Fe containing component, more than 300,000,000 tons blast furnace slags are discharged in China every year,
Substantial amounts of CaO, MgO, SiO are taken away every year2, coke, coal dust, carbon, carbon dust, the valuable component such as iron component, therefore, blast furnace slag is
A kind of important secondary resource.The blast furnace cinder temperature released by blast furnace discharges substantial amounts of thing every year at 1300 DEG C~1600 DEG C
Reason heat, therefore, blast furnace cinder is also important physics thermal resource.
Slag results from steelmaking process, is metallurgical intermediate products, and China is discharged every year1.5More than hundred million tons, 1500 are taken away every year
More than ten thousand tons of metallic iron, more than 30,000,000 tons of ferriferous oxide, also take away a large amount of free caos, phosphorus pentoxide, dioxy
The valuable components such as SiClx, therefore, slag are a kind of important secondary resources.The molten steel slag temperature that steelmaking process is released is higher than
1550 DEG C, substantial amounts of physical thermal is discharged every year, and therefore, molten steel slag is also important physics thermal resource.
Therefore, we have proposed a kind of copper-smelting thermal slag iron-extracting process.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of copper-smelting thermal slag iron-extracting process, its
Reaction time is short, productivity ratio is high, production cost is low, adaptability to raw material is strong, treating capacity is big, environment-friendly, economic well-being of workers and staff is high, can have
Effect solves environmental pollution, heat energy high efficiente callback Utilizing question.
A kind of copper-smelting thermal slag iron-extracting process proposed by the present invention, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 8-15 strength electricity is provided with below shaking table
Magnet plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation
3-6 times；
S3, the Fe that will be magneticly elected3O4Add in smelting furnace, by the temperature control in stove between 300-400 degree, and constantly into stove
Oxygen is passed through, chemical reaction 4Fe occurs under the high temperature conditions3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, to Fe per ton2O3Middle addition 300-500g zinc powder, is during which constantly stirred,
Make zinc powder and Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, it is during which continuous by the temperature control of high temperature furnace between 600-800 degree
It is passed through H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through
Cooling tower is condensed；
S6, then the iron of preparation is reclaimed；
S7, carry the slag after iron and be suitable for making cement clinker and devitrified glass etc., realize the zero of maximum resource utilization and pollution
Discharge.
Preferably, in the S2, Fe is removed3O4In the silica and calcium oxide that mix, repeat magnetic separation and operate 4 times.
Preferably, in the S3, the Fe that will magneticly elect3O4Add in smelting furnace, by the temperature control in stove at 360 degree, not
Break and oxygen is passed through into stove, chemical reaction 4Fe occurs under the high temperature conditions3O4+O2=6Fe2O36Fe2O3。
Preferably, in the S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 450g/ tons, during which constantly carried out
Stirring, makes zinc powder and Fe2O3It is sufficiently mixed.
Preferably, in the S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace at 750 degree,
Period is constantly passed through H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused by
H2O is passed through cooling tower and condensed.
Preferably, in the S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, so
The fine slag fully smashed is sent into sawtooth pulsation jig afterwards, the particulate matter less than 170 mesh is passed through pipe by sawtooth pulsation jig
Road drains into shaking table, and the particulate matter that will be greater than 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, in the lower section of shaking table
Be provided with 12 powerful electromagnetic iron plates, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, electromagnet breaks after screening
Electricity, reclaim Fe3O4。
In the present invention, clinker is first carried out to multiple grinding, the particle less than 170 mesh is ground into, then passes through sawtooth waveforms
Jigging machine screens to it, and screening is underproof to drain into clinker laydown area by shaking table, carries out secondary grinding, qualified particle
Adsorbed by electromagnet and carry out Fe3O4Recovery, by the Fe of recovery3O4Multiple magnetic separation is carried out, impurity therein of going out, then will
Fe3O4Add in smelting furnace, by the temperature control in stove between 300-400 degree, and oxygen generation Fe is constantly passed through into stove2O3,
By the Fe of preparation2O3Cooled down, to Fe per ton2O3Middle addition 300-500g zinc powder, is during which constantly stirred, makes zinc powder
With Fe2O3It is sufficiently mixed, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace between 600-800 degree,
Period is constantly passed through H2, and the ventilation in high temperature furnace is kept, finally obtained iron is reclaimed.Present inventive concept is novel, anti-
It is short between seasonable, productivity ratio is high, production cost is low, adaptability to raw material is strong, treating capacity is big, environment-friendly, economic well-being of workers and staff is high, can be effective
Solve environmental pollution, heat energy high efficiente callback Utilizing question.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Embodiment one
A kind of copper-smelting thermal slag iron-extracting process that the present embodiment proposes, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 12 powerful electromagnetics are provided with below shaking table
Iron plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 4
It is secondary；
S3, the Fe3O4 magneticly elected is added in smelting furnace, by the temperature control in stove between 386 degree, and is constantly passed through into stove
Oxygen, chemically react under the high temperature conditions4Fe3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 450g/ tons, be during which constantly stirred, make zinc powder with
Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace between 700 degree, is during which constantly passed through
H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower
Condensed；
S6, then the iron of preparation is reclaimed；The rate of recovery of iron is 72%.
Embodiment two
A kind of copper-smelting thermal slag iron-extracting process that the present embodiment proposes, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 13 powerful electromagnetics are provided with below shaking table
Iron plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 3
It is secondary；
S3, the Fe that will be magneticly elected3O4Add in smelting furnace, by the temperature control in stove between 386 degree, and be constantly passed through into stove
Oxygen, chemically react under the high temperature conditions4Fe3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 480g/ tons, be during which constantly stirred, make zinc powder with
Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace at 700 degree, is during which constantly passed through H2, and
The ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower progress
Condensation；
S6, then the iron of preparation is reclaimed；The rate of recovery of iron is 65%.
Embodiment three
A kind of copper-smelting thermal slag iron-extracting process that the present embodiment proposes, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 15 powerful electromagnetics are provided with below shaking table
Iron plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 6
It is secondary；
S3, the Fe3O4 magneticly elected is added in smelting furnace, by the temperature control in stove between 386 degree, and is constantly passed through into stove
Oxygen, chemically react under the high temperature conditions4Fe3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 480g/ tons, be during which constantly stirred, make zinc powder with
Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace between 650 degree, is during which constantly passed through
H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower
Condensed；
S6, then the iron of preparation is reclaimed；The rate of recovery of iron is 80%.
Example IV
A kind of copper-smelting thermal slag iron-extracting process that the present embodiment proposes, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 12 powerful electromagnetics are provided with below shaking table
Iron plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 4
It is secondary；
S3, the Fe3O4 magneticly elected is added in smelting furnace, by the temperature control in stove between 360 degree, and is constantly passed through into stove
Oxygen, chemically react under the high temperature conditions4Fe3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 450g/ tons, be during which constantly stirred, make zinc powder with
Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace between 750 degree, is during which constantly passed through
H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower
Condensed；
S6, then the iron of preparation is reclaimed；The rate of recovery of iron is 95%.
Embodiment five
A kind of copper-smelting thermal slag iron-extracting process that the present embodiment proposes, comprises the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 11 powerful electromagnetics are provided with below shaking table
Iron plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 5
It is secondary；
S3, the Fe that will be magneticly elected3O4Add in smelting furnace, by the temperature control in stove between 400 degree, and be constantly passed through into stove
Oxygen, chemically react under the high temperature conditions4Fe3O4+O2=6Fe2O36Fe2O3；
S4, by the Fe of preparation2O3Cooled down, and add the zinc powder of 500g/ tons, be during which constantly stirred, make zinc powder with
Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, by the temperature control of high temperature furnace between 680 degree, is during which constantly passed through
H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower
Condensed；
S6, then the iron of preparation is reclaimed；The rate of recovery of iron is 85%.
Present inventive concept is reasonable, greatly improves the rate of recovery of iron by being repeatedly ground and screening to clinker, recovery
Clinker afterwards recycles economic well-being of workers and staff height, can effectively solve environmental pollution, heat energy high efficiente callback Utilizing question.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (6)
1. a kind of copper-smelting thermal slag iron-extracting process, it is characterised in that comprise the following steps：
S1, clinker is sent into wet type sand shaker by belt conveyor and is fully broken into fine slag, it is then thin by what is fully smashed
Slag is sent into sawtooth pulsation jig, and the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than
The particulate matter of 170 mesh is immediately discharged to clinker laydown area, carries out secondary grinding, and 8-15 strength electricity is provided with below shaking table
Magnet plate, when particulate matter by when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4；
S2, to the Fe of recovery3O4Magnetic separation is carried out again, removes Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation operation 3-
6 times；
S3, the Fe that will be magneticly elected3O4Add in smelting furnace, by the temperature control in stove between 300-400 degree, and constantly into stove
Oxygen is passed through, chemical reaction 4Fe occurs under the high temperature conditions3O4+O2=6Fe2O3；
S4, by the Fe of preparation2O3Cooled down, to Fe per ton2O3Middle addition 300-500g zinc powder, is during which constantly stirred,
Make zinc powder and Fe2O3It is sufficiently mixed；
S5, by the Fe after cooling2O3It is put into high temperature furnace, it is during which continuous by the temperature control of high temperature furnace between 600-800 degree
It is passed through H2, and the ventilation in high temperature furnace is kept, chemical reaction Fe during which occurs2O3+3H2=2Fe+3H2O, by caused H2O is passed through
Cooling tower is condensed；
S6, then the iron of preparation is reclaimed；
S7, carry the slag after iron and be suitable for making cement clinker and devitrified glass, realize the zero-emission of maximum resource utilization and pollution
Put.
2. a kind of copper-smelting thermal slag iron-extracting process according to claim 1, it is characterised in that in the S2, remove
Fe3O4In the silica and calcium oxide that mix, repeat magnetic separation and operate 4 times.
3. according to claim2Described a kind of copper-smelting thermal slag iron-extracting process, it is characterised in that in the S3, by magnetic separation
The Fe gone out3O4Add in smelting furnace, by the temperature control in stove at 360 degree, and oxygen is constantly passed through into stove, under the high temperature conditions
Generation chemical reaction 4Fe3O4+O2=6Fe2O36Fe2O3。
4. according to claim1Described a kind of copper-smelting thermal slag iron-extracting process, it is characterised in that in the S4, will prepare
Fe2O3Cooled down, and add the zinc powder of 450g/ tons, be during which constantly stirred, make zinc powder and Fe2O3It is sufficiently mixed.
5. according to claim1Described a kind of copper-smelting thermal slag iron-extracting process, it is characterised in that in the S5, will cool down
Fe afterwards2O3It is put into high temperature furnace, by the temperature control of high temperature furnace at 750 degree, is during which constantly passed through H2, and keep in high temperature furnace
Ventilation, during which occur chemical reaction Fe2O3+3H2=2Fe+3H2O, by caused H2O is passed through cooling tower and condensed.
6. according to claim1Described a kind of copper-smelting thermal slag iron-extracting process, it is characterised in that in the S1, by clinker
It is sent into by belt conveyor in wet type sand shaker and is fully broken into fine slag, the fine slag fully smashed then is sent into sawtooth waveforms jumps
Eliminate in machine, the particulate matter less than 170 mesh is drained into shaking table by sawtooth pulsation jig by pipeline, will be greater than the particulate matter of 170 mesh
Matter is immediately discharged to clinker laydown area, carries out secondary grinding, and 12 powerful electromagnetic iron plates are provided with below shaking table, work as particulate matter
By when, Fe3O4Adsorbed by electromagnetism iron plate, power off electromagnet after screening, reclaim Fe3O4。
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Application publication date: 20180216 |