Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/71—Feed mechanisms
  • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
  • B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/71—Feed mechanisms
  • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
  • B01F35/71815—Feed mechanisms characterised by the means for feeding the components to the mixer using vibrations, e.g. standing waves or ultrasonic vibrations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/50—Mixing liquids with solids
  • B01F23/55—Mixing liquids with solids the mixture being submitted to electrical, sonic or similar energy
  • B01F23/551—Mixing liquids with solids the mixture being submitted to electrical, sonic or similar energy using vibrations
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
  • B01F23/60—Mixing solids with solids
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/71—Feed mechanisms
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
  • B01F35/71—Feed mechanisms
  • B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
  • B01F35/71705—Feed mechanisms characterised by the means for feeding the components to the mixer using belts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
  • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
  • B65G69/20—Auxiliary treatments, e.g. aerating, heating, humidifying, deaerating, cooling, de-watering or drying, during loading or unloading; Loading or unloading in a fluid medium other than air
• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B5/00—Making pig-iron in the blast furnace
• • 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
  • C22B1/00—Preliminary treatment of ores or scrap
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
  • B01F2101/50—Mixing mined ingredients and liquid to obtain slurries
• • 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

Definitions

• the present invention relates to a method for preventing adhesion and clogging of mineral raw materials, and particularly to a method for preventing adhesion and clogging of wet mineral raw materials in a transfer processing facility.
• the water collected on the floor of the hold puts the raw material for steelmaking under the aggregate into a slurry state.
• the ore raw material and the raw material dust are stored in the raw material yard in the open state, they may be in a slurry state due to water such as rain or watering to prevent dust.
• the mineral raw material slurry such as the iron-making raw material in such a slurry state is a muddy fluid having a large amount of water, there is a problem that it is difficult to carry it out from the hold or the raw material yard.
• the present inventor brought a polymer absorbent into contact with the iron-making raw material slurry to form a solidified body of the iron-making raw material slurry, which did not require labor such as draining and improved handling.
• a method is proposed (see Patent Document 1).
• the mineral raw materials that are carried into steelworks, thermal power plants, etc. and are piled up in the raw material yard are further transferred from the raw material yard to the equipment that uses the mineral raw materials by connecting the belt conveyor.
• the coal is generally transferred to the boiler in a series of lines after connecting to a belt conveyor and then passing through a coal crusher and a bucket type conveyor. Since the raw material yard and conveyor belt equipment are outdoors, the coal is exposed to rain and becomes wet.
• the wet coal tends to adhere to the contact surface of the transfer processing equipment such as the pipe (coal supply pipe) for supplying the coal to the boiler, the belt conveyor, the chute, and the hopper. Further, it may stick and the piping or the like may be clogged (blocked).
• the transfer processing equipment such as the pipe (coal supply pipe) for supplying the coal to the boiler, the belt conveyor, the chute, and the hopper. Further, it may stick and the piping or the like may be clogged (blocked).
• the present inventor contact-mixes a water-absorbent resin with a target mineral raw material, and by absorbing water on the surface of the mineral raw material, the fluidity and adhesiveness due to water are reduced to improve the transportability.
• a water-absorbent resin with a target mineral raw material, and by absorbing water on the surface of the mineral raw material, the fluidity and adhesiveness due to water are reduced to improve the transportability.
• the present invention when the mineral raw material is transferred or processed, the raw material mixture, which is a mixture of the mineral raw material and the water-absorbent resin, adheres to the transfer processing equipment and the transfer processing equipment is clogged (blocked). It was made to solve the problem of minerals. That is, the present invention is a method for efficiently and stably improving the adhesiveness of the raw material mixture and the transportability of the mineral raw material to prevent the raw material mixture from adhering to the transfer processing equipment and clogging (blocking) of the transfer processing equipment. The purpose is to provide.
• the water-absorbent resin adheres to the transfer treatment equipment or clogs the transfer treatment equipment (blockage). It is based on the finding that the risk is reduced and that the water-absorbent resin sufficiently absorbs water in the entire mineral raw material to obtain a sufficient reforming effect.
• the present invention provides the following [1] to [4].
• [1] A method of transferring or treating a raw material mixture in which a mineral raw material is brought into contact with a water-absorbent resin conforming to the following criteria in a transfer processing facility to prevent adhesion and clogging of the mineral raw material in the transfer processing facility.
• the standard is that water of the same mass as that of the water-absorbent resin is added to the water-absorbent resin, and after 10 minutes have passed, the water-absorbent sample is subjected to a vibration sieve having an opening of 9.5 mm and a frequency of 2800 rpm for 1 minute.
• the transfer processing equipment includes a shipyard, unloader, stacker, raw material yard, reclaimer, piping, belt conveyor, belt conveyor transit part, conveyor chain, chute, hopper, silo, compounding tank, crusher, and humidity control coal equipment.
• the adhesiveness of the raw material mixture and the transportability of the mineral raw material are efficiently and stably improved to prevent the raw material mixture from adhering to the transfer processing equipment and clogging (blocking) of the transfer processing equipment. Can be done. Therefore, the method of the present invention can contribute to the efficient transfer or treatment of mineral raw materials.
• adhesion prevention in the present invention includes not only the case where the mineral material does not adhere at all, but also the case where the adhesion is sufficiently suppressed to the extent that the transfer of the mineral raw material is not hindered even when the mineral material adheres partially. It shall be used in a meaning.
• a mineral raw material particularly a raw material mixture in which a wet mineral raw material is brought into contact with a water-absorbent resin satisfying a predetermined standard is transferred or treated by a transfer processing facility, and the mineral is described. This is to prevent adhesion and clogging (blockage) of raw materials in the transfer processing equipment.
• the surface of the mineral raw material is modified by contact with a water-absorbent resin that meets a predetermined standard.
• the adhesion of the mineral raw material to the contact surface of the transfer processing equipment is suppressed, the slipperiness is improved, and the mineral raw material can be prevented from adhering or being clogged (blocked) in the transfer processing equipment. can.
• the type of mineral raw material is not particularly limited, and examples thereof include coal, iron ore, dust, coke, and limestone. These may be one kind alone or a mixture of two or more kinds.
• the shape, size, etc. of the mineral raw material are not particularly limited, but since the present invention is a method for preventing clogging (clogging), it is in a form that is easily clogged, for example, one particle. It is preferably applied to particles having a particle size of 2 mm or less, such as granules and powders.
• the particle size of the mineral atom is the particle size measured by using the JIS Z 8815 sieving test method (dry sieving method).
• wet mineral raw material refers to a mineral raw material that is not in a slurry state but contains water and can be conveyed as a solid substance by a belt conveyor. That is, it is distinguished from a slurry which is a muddy or liquid fluid having a large amount of water, which is difficult to convey by a belt conveyor.
• the water content (moisture content) in the wet mineral raw material varies depending on the type and properties of the mineral raw material and cannot be unconditionally determined. For example, in the case of coal, the water content is about 1 to 30 mass. When it is%, it can be said that it is in a wet state, and when it exceeds about 30% by mass, it can be said that it is in a slurry state.
• the origin of the water content in the mineral raw material is not particularly limited, and it may be derived from the raw material itself, or it may be water such as water sprinkled to prevent rain or dust that comes into contact during transportation or storage. good.
• Water-absorbent resin The water-absorbent resin is defined in JIS K7223 (1996) and JIS K7224 (1996) as "a resin that highly absorbs and swells water, and is a hydrophilic substance having a crosslinked structure that absorbs water by coming into contact with water. It has the characteristic that once it absorbs water, it does not easily separate even when pressure is applied. " That is, it is a resin having a large amount of water absorption and excellent water retention.
• the type of the water-absorbent resin may be either a synthetic resin type or a natural product-derived type, and is not particularly limited.
• examples thereof include acrylic acid esters, poly (meth) acrylamides, polyalkyleneimines, polyoxyalkylenes, polymaleic acids, and copolymers containing any of the monomers constituting them.
• “(meth) acrylic” means acrylic or methacryl.
• Examples of the monomer constituting the poly (meth) acrylate include sodium (meth) acrylate, potassium (meth) acrylate, ammonium (meth) acrylate and the like.
• Examples of the monomer constituting the poly (meth) acrylic acid ester include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, and (meth). ) Isobutyl acrylate, hydroxyethyl (meth) acrylate, -2-ethylhexyl (meth) acrylate and the like.
• Examples of the monomer constituting the polyalkyleneimine include ethyleneimine and methylethyleneimine.
• Examples of the monomer constituting the polyoxyalkylene include ethylene oxide and propylene oxide.
• Examples of other monomers constituting the copolymer include vinyl sulfonic acid, styrene sulfonic acid, N-ethyl (meth) acrylamide, vinyl pyridine and the like.
• the water-absorbent resin may be used alone or in combination of two or more. From the viewpoint of availability, high water absorption, and the like, polyacrylic acid or sodium polyacrylate is preferably used, and sodium polyacrylate is particularly preferable. Further, the water-absorbent resin may be used in combination with another water-absorbing agent. Examples of other water-absorbing agents include water-absorbing agents that do not easily agglomerate, such as silica gel, zeolite, and activated carbon. Further, as the concentration of the other water-absorbing agent, the water-absorbent resin is selected so as to satisfy the selection criteria described later even if the other water-absorbing agent is used in combination.
• the properties of the water-absorbent resin are preferably granular or powdery having a particle size equal to or smaller than that of the mineral raw material from the viewpoint of uniform contact with the surface of the mineral raw material and ease of handling.
• the amount of the water-absorbent resin to be brought into contact with the mineral raw material is appropriately adjusted according to the type and properties of the mineral raw material and the water-absorbent resin, but the surface of the mineral raw material surface without impairing the desired physical properties in the use of the mineral raw material.
• 0.001 is obtained with respect to 100 parts by mass of wet coal (coal having a water content of 1 to 30% by mass). It is preferably about 5 parts by mass, more preferably 0.005 to 1 part by mass, and even more preferably 0.01 to 0.5 parts by mass.
• a water-absorbent resin that does not easily become lumpy is selected based on the following criteria.
• the standard is a vibrating sieve test in which water having the same mass as that of the water-absorbent resin is added to the water-absorbent resin, and after 10 minutes have passed, the water-absorbent sample is placed on a vibrating sieve having a mesh size of 9.5 mm and a frequency of 2800 rpm for 1 minute. Is performed, and the residual ratio (mass%) of the water-absorbing sample on the vibrating sieve is calculated by the following formula (1). Then, a water-absorbent resin having a residual ratio of 50% by mass or less, preferably 40% by mass or less is selected.
• Residual rate (mass of water-absorbing sample on vibrating sieve after vibrating sieve test) ⁇ (mass of water-absorbing sample (total water-absorbing sample) on vibrating sieve before vibrating sieve test) ⁇ 100 ... (1) )
• the method for producing the water-absorbent resin having a residual ratio of 50% by mass or less is not particularly limited, and examples thereof include a reverse phase suspension polymerization method and an aqueous solution polymerization method.
• a reverse phase suspension polymerization method a monomer mixture containing a monomer such as acrylic acid and sodium acrylate and an aqueous solution containing a polymerization catalyst, a cross-linking agent, etc. are suspended by a dispersant in an organic solvent (hexane, toluene, etc.). It is a method of polymerizing at a constant temperature (for example, 60 to 80 ° C.).
• the organic solvent is removed by centrifugal dehydration or the like, and the water content is further removed by a dryer or the like to obtain a pearl-like water-absorbent resin.
• the aqueous solution polymerization method is continuous with an adiabatic polymerization method in which water is used as a solvent and a mixed solution containing a monomer such as acrylic acid or sodium acrylate; a polymerization catalyst; a cross-linking agent or the like is used to polymerize in a reaction vessel.
• a belt-type polymerization method in which the mixed solution is polymerized on a moving belt conveyor.
• the polymer obtained by the aqueous solution polymerization method is dried, water is removed, and then pulverized (crushed) to adjust the particle size distribution.
• surface cross-linking is preferable in order to prevent the water-absorbent resin from agglomerating after absorbing water.
• surface cross-linking means "cross-linking molecular chains near the surface of the water-absorbent resin to increase the cross-linking density of the surface layer".
• the surface-crosslinked water-absorbent resin can be obtained, for example, by adding a cross-linking agent such as a polyhydric alcohol.
• the transfer processing equipment referred to in the present invention refers to equipment in a transfer line that feeds mineral raw materials on a predetermined line, for example, from a shipyard to a facility that uses mineral raw materials through a storage place for mineral raw materials such as a raw material yard.
• a transfer line that feeds mineral raw materials on a predetermined line
• a facility that uses mineral raw materials through a storage place for mineral raw materials such as a raw material yard.
• those having a function of temporarily storing such as a chute, a hopper, and a silo are also included. It is distinguished from transportation by ship or truck, transportation by bucket, etc.
• the present invention provides good adhesion and good adhesion in transfer processing equipment, particularly in places where inconveniences are likely to occur due to adhesion and clogging (blockage), specifically, in piping, belt conveyors, conveyor chains, chutes, hoppers, silos, and the like.
• adhesion and clogging blockage
• the effect of preventing clogging (blockage) can be obtained. Mineral raw materials are prone to adhesion and clogging (blockage) in these transfer processing equipment, and if they are clogged, it is necessary to stop the operation of the line and then clear the clogging (blockage), which is troublesome. Was required.
• the slipperiness of the mineral raw material is improved and it becomes difficult for the mineral raw material to adhere to the contact surface of the transfer processing equipment, so that the minerals in the transfer processing equipment can be used without stopping the operation of the line. It is possible to easily prevent clogging (blockage) of raw materials and improve transportability efficiently and stably.
• the raw material mixture is a mixture of a mineral raw material and a water-absorbent resin obtained by contacting a mineral raw material with a water-absorbent resin.
• a water-absorbent resin obtained by contacting a mineral raw material with a water-absorbent resin.
• the water-absorbent resin comes into contact with the mineral raw material, at least a part of the water content in the mineral raw material is absorbed by the water-absorbent resin, the water content on the surface of the mineral raw material is reduced, and the contact of the transfer processing equipment of the mineral raw material is performed. Adhesion to the surface is suppressed and slipperiness is improved. It is only necessary to suppress the adhesion to the contact surface of the transfer processing equipment, and it is not necessary for the entire amount of water contained in the mineral raw material to be absorbed by the water-absorbent resin.
• the method of contacting the mineral raw material with the water-absorbent resin to obtain the raw material mixture is not particularly limited, but the raw material mixture in a state where the mineral raw material and the water-absorbent resin are uniformly mixed and in contact with each other. Is preferably obtained.
• the position where the water-absorbent resin is brought into contact is not particularly limited, and may be any of before, during, and after the transfer of the mineral raw material by a transfer processing facility such as a belt conveyor.
• a raw material mixture can be obtained by spraying the water-absorbent resin on the mineral raw material before or during the transfer in a transfer processing facility such as a belt conveyor.
• the water-absorbent resin is sprayed from above the mineral raw material on the mineral raw material transferred by the transfer processing equipment such as a belt conveyor.
• the mineral raw material and the water-absorbent resin are mixed each time the transfer processing equipment such as a belt conveyor is transferred, and the water-absorbent resin is uniformly adhered to the surface of the mineral raw material to obtain an overall uniform raw material mixture.
• the raw material mixture can also be obtained by adding the water-absorbent resin into a predetermined container containing a mineral raw material and stirring and mixing the mixture.
• the method of adding the water-absorbent resin to the mineral raw material is not particularly limited, and examples thereof include spraying, air pumping, and screw feeder.
• the method of mixing the water-absorbent resin and the mineral raw material is not particularly limited, and a method of mixing coal and the water-absorbent resin using a heavy machine, a method of mixing using the impact of the connecting portion of the belt conveyor, and a method of mixing. Examples thereof include a method of mixing using a mixing device such as a mixer.
• Example 1 [Aggregation judgment test] As a water-absorbent resin, 5.0 g of "Kuriline (registered trademark) S-250" (manufactured by Kurita Water Industries, Ltd .; sodium polyacrylate) was placed on a petri dish almost evenly, and pure water 5 having the same mass as the water-absorbent resin was placed in the petri dish. .0 g was added by mist blowing and allowed to absorb water for 10 minutes.
• Kuriline registered trademark
• S-250 manufactured by Kurita Water Industries, Ltd .
• pure water 5 having the same mass as the water-absorbent resin was placed in the petri dish. .0 g was added by mist blowing and allowed to absorb water for 10 minutes.
• the water absorption sample after water absorption is placed in an electric sieve (“ANF-30”, manufactured by Nisso Kagaku Co., Ltd.) with a sieve mesh of 9.5 mm, and the water absorption sample (total water absorption sample) on the vibration sieve before the vibration sieve test is placed.
• the mass (A) is measured, a vibrating sieve test is performed on a vibrating sieve (opening 9.5 mm, frequency 2800 rpm) for 1 minute, and the mass after the vibrating sieve test (water absorption sample on the vibrating sieve after the vibrating sieve test) is performed.
• the mass (B)) was measured, and the residual ratio (mass%) was calculated from the following formula.
• the residual rate (mass%) is an index for selecting whether the water-absorbing sample is easily agglomerated.
• Residual rate [mass%] B / A x 100
• the adhesion evaluation test of the raw material mixture sample was carried out using a vibration test device equipped with (2, angle: 70 °), made of steel). To evaluate the adhesiveness, the prepared raw material mixture sample was put into the simulated hopper of the vibration test device, and the raw material mixture sample (adhesion amount (X) in the hopper) (g) adhering to the simulated hopper after the test was measured. went.
• the water content the mass (C) of about 7 g of iron ore was measured, and the mass (D) after drying this in a dryer at 105 ° C. for 2 hours was measured, and the weight was reduced (C-). D) was regarded as the water content and calculated from the following formula (2).
• Moisture content [mass%] (CD) / C ⁇ 100 ... (2)
• Example 2 Example 2 and Comparative Examples 1 to 3
• “Kuriline (registered trademark) S-250” manufactured by Kurita Kogyo Co., Ltd .; sodium polyacrylate
• “Kuriline (registered trademark) S-260 Korean Chemical Company, Inc.
• Example 3 instead of using "Kuriline (registered trademark) S-250" (manufactured by Kurita Kogyo Co., Ltd .; sodium polyacrylate) as the water-absorbent resin, “Kuriline (registered trademark) S-260 (Kurita Kogyo)” was used, respectively.
• Example 2 Sodium polyacrylate
• Example 2 Sunfresh (registered trademark) OK-100 (Sanyo Kasei Kogyo Co., Ltd .: Acrylic polymer partially sodium salt crosslinked product)
• Comparative Example 1 " , "CL-SA4 (SNF Co., Ltd .: sodium polyacrylate) (Comparative Example 2)", “CL-SA5 (SNF Co., Ltd .: sodium polyacrylate) (Comparative Example 3)”
• the agglomeration determination test and the adhesion evaluation test were carried out in the same manner as in Example 1 except that the above was used.
• Example 4 Comparative Example 4
• the agglomeration determination test and the adhesion evaluation test were carried out in the same manner as in Example 1 except that the water-absorbent resin was not used.
• the water-absorbent resin having a residual ratio of 50% by mass or less determined by the vibrating sieve test As described above, by using the water-absorbent resin having a residual ratio of 50% by mass or less determined by the vibrating sieve test, the adhesion of the raw material mixture to the contact surface of the transfer processing equipment is suppressed, the slipperiness is improved, and the adhesion and adhesion are suppressed. It can be said that it is possible to prevent clogging (blockage).
• Example 5 (Comparative Example 5) In Example 1, instead of using "Kuriline (registered trademark) S-250" (manufactured by Kurita Water Industries, Ltd .; sodium polyacrylate) as the water-absorbent resin, "Kuriline (registered trademark) S-200 (Kurita Water Industries, Ltd.) Manufacture: Sodium polyacrylate) ”was used, and the agglomeration determination test was carried out in the same manner as in Example 1. As a result, the residual rate was 91% by mass.
• "Kuriline (registered trademark) S-250” is a water-absorbent resin used in Example 1 of Patent Document 1. As described above, the water-absorbent resin described in Example 1 of Patent Document 1 did not have the constitution "residual rate of 50% or less" of the present invention.

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• Chemical & Material Sciences (AREA)
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• Engineering & Computer Science (AREA)
• Metallurgy (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Manufacturing & Machinery (AREA)
• Mechanical Engineering (AREA)
• Environmental & Geological Engineering (AREA)
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• Geochemistry & Mineralogy (AREA)
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• Dispersion Chemistry (AREA)
• Solid-Sorbent Or Filter-Aiding Compositions (AREA)
• Auxiliary Methods And Devices For Loading And Unloading (AREA)
• Accessories For Mixers (AREA)
• Manufacture And Refinement Of Metals (AREA)
• Manufacture Of Iron (AREA)
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• 2020
  • 2020-04-09 JP JP2020070560A patent/JP6825738B1/ja not_active Ceased
• 2021
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  • 2021-03-18 WO PCT/JP2021/011019 patent/WO2021205835A1/ja active Application Filing
  • 2021-03-18 CN CN202180027132.1A patent/CN115427323A/zh active Pending
  • 2021-03-18 AU AU2021252700A patent/AU2021252700A1/en active Pending
  • 2021-03-18 KR KR1020227034816A patent/KR20220165743A/ko unknown
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