WO2003038138A1 - Raffinage et equipement de coulee non ferreuse - Google Patents

Raffinage et equipement de coulee non ferreuse Download PDF

Info

Publication number
WO2003038138A1
WO2003038138A1 PCT/CN2002/000741 CN0200741W WO03038138A1 WO 2003038138 A1 WO2003038138 A1 WO 2003038138A1 CN 0200741 W CN0200741 W CN 0200741W WO 03038138 A1 WO03038138 A1 WO 03038138A1
Authority
WO
WIPO (PCT)
Prior art keywords
ferrous metal
vacuum
purification
chamber
melting
Prior art date
Application number
PCT/CN2002/000741
Other languages
English (en)
Chinese (zh)
Inventor
Desheng Huang
Original Assignee
Desheng Huang
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Desheng Huang filed Critical Desheng Huang
Publication of WO2003038138A1 publication Critical patent/WO2003038138A1/fr

Links

Classifications

    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/064—Obtaining aluminium refining using inert or reactive gases
    • 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
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/068—Obtaining aluminium refining handling in vacuum
    • 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
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/04—Refining by applying a vacuum

Definitions

  • the invention relates to a method for purifying a non-ferrous metal melt, in particular to an aluminum for purifying impurities such as hydrogen, oxides and other harmful substances in the molten aluminum liquid, purifying the aluminum liquid, and ensuring the quality and performance of the casting. Purification and refining method of molten metal, and equipment designed to realize the purification method. Background technique
  • the traditional treatment method is to directly pass a purification gas such as nitrogen, argon, chlorine or a refining agent to the bottom of the molten aluminum in the melting furnace.
  • a purification gas such as nitrogen, argon, chlorine or a refining agent
  • the purification bubbles generated rise upward, the impurities in the molten aluminum, including hydrogen and hydrogen, are captured and captured along the way. Oxidation slag, bring them to the aluminum surface, hydrogen escapes from the surface of the molten aluminum, and the oxide slag is raked out of the furnace.
  • This method is inefficient, uneven, and labor-intensive.
  • relevant purification equipment came into being. More famously, there are FILD in Britain, ALPUR in France, HM-MAXIJET in Germany, ALCOA, SNIF, PAL and so on.
  • HM-MAXIJET, ALPUR or PAL their have one thing in common, that is, they use traditional processing methods to pass nitrogen, chlorine, argon and other gases to the bottom of the aluminum solution to form large and small Bubbles, adsorb hydrogen and impurities suspended in aluminum solution, take them on aluminum and use graphite nitrogen diffusion tube buried in the bottom of the furnace, plus alumina beads to adsorb and filter impurities; HM-MAXIJET, SNIF, ALPUR, and PAL use rotation Rotor.
  • the purification efficiency of the rotating rotor is higher than that of direct radiation. However, if the purification gas is only nitrogen, its purification efficiency is also not ideal.
  • HM-MAXIJET, SNIF and PAL require injection of cleaning agents containing chlorine (CI) or fluorine (F); these are harmful to human health and the environment.
  • CI chlorine
  • fluorine fluorine
  • these devices also need to use a covering agent such as aerobic (C1) or fluorine (F), which also has environmental issues.
  • the present invention provides a method for purifying a non-ferrous metal melt, so that the purification treatment of the non-ferrous metal melt not only meets environmental protection requirements, but also achieves high efficiency, energy saving, and low consumption.
  • the object of the present invention is also to Providing purification equipment required to implement the above method makes the above method easier to implement.
  • the present invention provides a method for purifying a non-ferrous metal melt, the method includes passing a purified gas through the non-ferrous metal melt from bottom to top to perform adsorption purification, and is characterized in that at the same time as gas adsorption purification, A vacuum is evacuated above the non-ferrous metal melt to form a negative pressure attraction to the melt.
  • the purification gas is an inert gas, preferably nitrogen.
  • the present invention further provides a device for implementing the above method, which is characterized in that the device is composed of a non-ferrous metal melting and processing device and a vacuum device, wherein the vacuum device is connected to a space above the melt in the non-ferrous metal melting and processing device.
  • the non-ferrous metal melting and processing device may be a single-chamber structure, a multi-chamber structure or a non-chamber structure.
  • a single-chamber structure non-ferrous metal melting and processing device is provided with a shell.
  • the inner space of the shell constitutes a processing chamber.
  • the upper part of the shell is equipped with a vacuum cover connected to a vacuum machine.
  • the bottom of the shell is equipped with a purge gas diffusion plate.
  • the bottom of the shell is equipped with a shutter.
  • a metal liquid inlet and a metal liquid outlet are provided on the side, and a sight glass is mounted on the vacuum cover.
  • the single-chamber structure non-ferrous metal melting and processing device is provided with a cover.
  • the top of the cover is equipped with a vacuum cover and a sight glass.
  • the bottom is equipped with a base.
  • the cover is equipped with a crucible.
  • the bottom of the crucible is equipped with a bell-shaped purification gas diffusion tube. There is also a heater.
  • the multi-chamber structure non-ferrous metal melting and processing device is provided with a shell.
  • the inner space of the shell is longitudinally divided into a cleaning chamber and a processing chamber.
  • a vacuum chamber is arranged above the processing chamber.
  • a heater is installed in the processing chamber and the cleaning chamber.
  • the purification gas diffusion plate is provided with a metal liquid inlet and a metal liquid outlet on the shell, and a vacuum glass is installed on the vacuum chamber.
  • the non-ferrous metal melting and processing device without a chamber structure is provided with a vacuum cover and a sight glass on the upper part of the melting furnace, and a bell-shaped purification gas diffusion tube is installed in the furnace.
  • the purification method organically combines two original irrelevant purification methods such as nitrogen (N) bubble adsorption and vacuum (V) negative pressure suction, and realizes the method through one device.
  • N nitrogen
  • V vacuum
  • gas adsorption and vacuum attract one by one, push and pull, and complement each other. Effectively solve the environmental protection, high efficiency, energy saving, low consumption and other industry wished problems.
  • the high efficiency of the present invention is that the horizontal area of the purification equipment is 63 "* 43" and the FILD is 75 "* 118", that is, the horizontal area of the equipment of the present invention is less than one third of the FILD; Only half a ton, FILD is about 2 tons, and the semi-continuous casting speed is 400kg per minute. That is to say, the processing time of aluminum maggot when passing through this equipment is only over 1 minute, and it is 5 minutes when passing through FILD. However, the purification effect of aluminum liquid processed by this equipment is still better than FILD. Especially for magnesium (Mg) -containing aluminum alloys, we use the vacuum bubble measurement method with a vacuum degree of 29 InHg.
  • the top of the aluminum liquid sample that has not been prepared is bulged upward, such as a hamburger. Sore holes; while the aluminum liquid sample processed by it has a regular depression at the top toward the center, The profile is dense. The two are in stark contrast. It is difficult for FILD to have such a clear comparison.
  • the performance of French ALPUR is worse than FILD, and the purification effect of 40 minutes is not as good as 5 minutes of FILD.
  • the environmental protection effect of the present invention is shown in the following.
  • the present invention does not use chlorine (C1) or chlorine (C1) or fluorine (F) -containing cleaning agents that are harmful to human health, but uses harmless human health and the environment. And cheap nitrogen.
  • the present invention mainly relies on a combination of completely physical methods such as nitrogen (N) bubble adsorption and vacuum (V) negative pressure suction to purify aluminum liquid.
  • N nitrogen
  • V vacuum
  • the covering agent containing chlorine (C1) or fluorine (F) can also effectively prevent the oxidation of aluminum liquid to generate alumina slag.
  • the above FILD consumes a large amount of money each year and generates a large amount of C02, which seriously pollutes the working environment and is not environmentally friendly.
  • the invention adopts an immersion type electric heating rod, and the heat generated can be completely absorbed by the aluminum liquid, which not only saves energy, but also greatly improves the environment.
  • the equipment and its surroundings are filled with oxidized powder residue, and the equipment is always kept clean. It can be seen that the present invention completely solves the environmental protection problems existing in other purification equipment, and is therefore definitely an environmental protection-type purification equipment.
  • the low power consumption of the present invention is manifested in the high purification efficiency of the device.
  • the volume used is small, and three 8kw electric heating rods are used for heating.
  • FILD is heated by LPG, which is over 1.2 million Hong Kong dollars per year. Compared with FILD, using this equipment can save more than one million Hong Kong dollars in energy expenditure each year.
  • This equipment is also a vacuum treatment. Because the top space of the treatment chamber is oxygen-free, not only will the new oxide slag not be generated during the purification treatment, but also the alumina produced will be reduced to aluminum, which will greatly reduce metal loss. This is absolutely impossible for FILD, SNIF, ALPUR, PAL and other equipment.
  • the invention is also applicable to the purification treatment of other non-ferrous metals, especially copper alloys.
  • other non-ferrous metals especially copper alloys.
  • the gas absorption and oxidation are more serious than those of aluminum.
  • nitrogen was generally used.
  • Purification treatment with NSV equipment must have significant efficiency and effect.
  • FIG. 1 is a sectional view of the structure of a non-ferrous metal melting and processing device with a multi-chamber structure according to the present invention.
  • FIG. 2 is a side view of FIG. 1.
  • FIG. 3 is a plan view of FIG. 2.
  • FIG. 4 is a cross-sectional view of another structure of a non-ferrous metal melting and processing device with a multi-chamber structure according to the present invention.
  • Fig. 5 is a sectional view of the structure of a non-ferrous metal melting and processing device with a single chamber structure according to the present invention.
  • Fig. 6 is a side view of Fig. 5.
  • FIG. 7 is a cross-sectional view of another structure of a non-ferrous metal melting and processing device with a single chamber structure according to the present invention.
  • FIG. 8 is a sectional view of the structure of the non-ferrous metal melting and processing device without a chamber structure according to the present invention.
  • the combination of bubble adsorption (N) and vacuum negative pressure (V) of the purified gas to generate an efficient and environmentally friendly purification function is the technical basis and core of the present invention, and is also a technical feature of the present invention that is different from other types of purification methods.
  • the processing chamber of the bubble adsorption purification equipment is closed or semi-closed, so when the purification bubbles rise from the bottom, the impurities in the aluminum liquid, including hydrogen and oxide slag, rise to the liquid surface and enter the top space of the processing chamber. As it gathers there, it will soon form a saturated state and generate pressure, which will form resistance to the impurities that continue to run out of the aluminum liquid. The concentration of impurities in the upper aluminum liquid will also increase, which will definitely weaken the purification efficiency. In order to improve the purification efficiency, European and American experts often work on chemical methods and chemical agents, so that the efficiency is not much improved, but environmental protection problems of one kind or another occur.
  • the vacuum pump is started, and the aluminum liquid is pulled by the vacuum negative pressure; at the same time, the purified gas (In this example, nitrogen) enters the melt through the purge gas diffusion plate at the bottom of the device.
  • the purified gas In this example, nitrogen
  • the surface of the molten aluminum rolls because of the nitrogen bubbles rising from the bottom.
  • the nitrogen bubbles rise in the aluminum liquid of the processing chamber, the impurities in the aluminum liquid are adsorbed and captured along the way, including hydrogen and oxides.
  • the surface tension of the molten aluminum is weakened due to the rolling of the aluminum wave.
  • the nitrogen gas bubbles entrain hydrogen and oxides, quickly break through the surface of the molten aluminum, and are sucked into the top space of the processing chamber, and are discharged out of the equipment through the vacuum cover, the exhaust pipe, the cooler, and the vacuum pump.
  • a vortex Spiral
  • the vortex plane and the nitrogen bubble rising from the bottom are almost 90%. Contact makes the contact comprehensive and even.
  • due to the effect of centrifugal force aluminum molecules with a higher density are dropped to the periphery of the vortex.
  • the method of the present invention uses nitrogen (N) as a purification carrier, not only because it is cheap, but also mainly because it is harmless to the environment and the health of the operator, and is environmentally friendly.
  • This equipment can also use chlorine (C1) gas and argon (Ar) gas as purification gas, and even add fluorine-containing chlorine-containing purification agent, which can improve the purification efficiency, but this is either too costly or has serious environmental protection problems Therefore, the use of this equipment is discouraged and the use of chlorine gas is discouraged.
  • N nitrogen
  • V vacuum
  • N nitrogen
  • V vacuum
  • Figs. 1 to 3 show an optimal structural form, which is a multi-chamber structure.
  • the multi-chamber structure non-ferrous metal melting and processing device 12 is provided.
  • the inner space of the shell is longitudinally divided into a cleaning chamber 1202 and a processing chamber 1203.
  • the cleaning chamber is used to store the cleaned melt, and the upper hinge frame 1214 passes through it.
  • the hinge shaft 1212 is connected to the clean room furnace cover 1211.
  • the processing chamber is used for purifying the molten metal, and a water-cooled furnace cover 1218 is installed above the hinge shaft 1217 mounted on the hinge frame 1216, and the ceiling shaft 1220 and bearings are mounted on the ceiling bracket 1219.
  • 1221 Sprockets 1222, 1223, 1224 are equipped with a transmission chain 1225 and a hanging chain 1226 connected to the water-cooled furnace cover.
  • the water-cooled furnace cover can be opened by the above sprocket device, or it can be manually turned on the furnace cover. Arm 1213 is manually opened.
  • a vacuum chamber 1204 is provided above the water-cooled furnace lid, which is used to create a vacuum above the melt.
  • the vacuum chamber is provided with a vacuum device 20 for generating a vacuum, which may be a vacuum pump or other vacuum machinery.
  • the vacuum chamber communicates with the processing chamber, and a vacuum cover 1215 is installed on the top of the vacuum chamber.
  • a heater 1205 is installed in each of the processing room and the clean room.
  • the heater is an electric heating rod.
  • the electric heating rod can be a vertical hanging type as shown in FIG. 1, that is, the upper end is connected to two furnace covers. Part of it is directly hung in the processing room and the clean room. It can also be horizontally embedded as shown in Figure 4, that is, the extension of the electric heating rod is horizontally embedded in the refractory lining of the furnace cavity as required. Regardless of the form, this electric heating rod is an internal heating type or a direct heating type.
  • the bottom of the shell is lined with refractory bricks 1227 and 1228.
  • the upper part of the refractory bricks is equipped with a purification gas diffusion plate 1206, which is connected to the air pump.
  • the diffuser plate can also use a bell-shaped diffuser tube as in Example 2 or other various rotors.
  • the housing is provided with a metal liquid inlet 1207 and a metal liquid outlet 1208, and a vacuum glass 1209 is installed on the vacuum chamber to observe the liquid level on the surface of the aluminum liquid for reference when adjusting the vacuum degree.
  • the equipment can also be coated with alumina beads in the processing room and clean room.
  • Alumina beads have the function of adsorbing and filtering impurities.
  • You can also attach a filter box with a ceramic filter plate at the exit of the clean room to filter aluminum. Impurities in the liquid. Although these have a positive effect on the quality of the molten aluminum, they are only subsidiary to the entire equipment. Users can decide whether it is necessary to install according to specific needs.
  • the equipment for implementing the purification method of the present invention may also be a single-chamber structure shown in FIGS. 5 to 7.
  • the non-ferrous metal melting and processing device 11a with a single-chamber structure is provided with a shell llai, and the inner wall of the shell is affixed There is a refractory plate lias, the inner space of the shell constitutes a processing chamber lla2, the upper part of the shell is equipped with a vacuum cover lla3 connected to a vacuum machine, the bottom of the shell is equipped with a purification gas diffusion plate lla4, and the bottom of the shell is equipped with a shutter lla9, with metal on both sides thereof
  • the liquid inlet lias and the metal liquid outlet lla6 are equipped with a peep mirror lla7 on the vacuum cover.
  • This device is a simpler device for continuous or semi-continuous casting. If conditions permit, flow channel NSV devices can also be added with eddy current function. If the conditions are not acceptable, it is not necessary to arrange it; but in order to avoid the aluminum liquid being short-circuited after the aluminum liquid is pumped up, it will directly flow out without vacuum treatment, and a shutter should be installed in the device.
  • the aluminum liquid flows in from the metal liquid inlet, rises through the gate, flows to the metal liquid outlet, inputs nitrogen, and starts a vacuum pump for purification treatment.
  • the sight glass is used to observe the water level on the surface of the molten aluminum to adjust the vacuum. In order to improve the purification effect, the length of the device should be increased as much as possible.
  • a non-ferrous metal melting and processing device with a single-chamber structure is shown in Fig. 7.
  • This device can be used for discontinuous casting.
  • the device lib is provided with a cover llbi, a vacuum cover llb2 and a sight glass llb3 on the top of the cover, a base llb4 on the bottom, a crucible libs inside the cover, a bell-shaped purification gas diffusion tube llb6 on the bottom of the crucible, and a crucible Also equipped with a heater llb7.
  • the aluminum liquid to be processed is loaded with a crucible or the like and placed in an outer cover for processing.
  • the device is generally not limited by the processing time and can achieve the best purification effect.
  • the device must be equipped with an electric heating device to prevent the molten aluminum from solidifying due to the long processing time. It uses a bell-shaped purge gas diffusion tube connected to the outer cover, and various types of rotating rotors can also be used to improve the degassing efficiency.
  • the sight glass is used to observe the water level on the surface of the molten aluminum to adjust the vacuum.
  • the equipment for implementing the purification method of the present invention may also have a single-chamber structure as shown in FIG. .
  • the device is directly used on various stoves such as electric induction furnaces or holding furnaces, and is covered with a bell-shaped purification gas diffusion tube to spray nitrogen (N) gas; various types of rotating rotors can also be used to improve Degassing Rate.
  • N nitrogen
  • various types of rotating rotors can also be used to improve Degassing Rate.
  • N nitrogen
  • a vacuum cover (V) is necessary so that it can be combined with nitrogen bubbles to purify the metal liquid.
  • the device and the device l ib are the same, and are not limited by the processing time, and the processing effect is ideal.
  • the present invention is not limited to the above-mentioned embodiments, any method and related equipment for purifying non-ferrous metal melt by combining purification gas adsorption and vacuum suction, and equivalent transformation methods related thereto will fall within the scope of the invention Inside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé de raffinage d'une coulée non ferreuse et son équipement. Le procédé, consistant à purifier par adsorption au moyen d'un gaz purifié traversant la coulée non ferreuse, est caractérisé en ce qu'on applique du vide au dessus de la coulée non ferreuse tandis qu'a lieu un raffinage par adsorption du gaz afin d'obtenir une pression réduite tirant le métal fondu. L'équipement est composé d'un dispositif de fusion et de traitement non ferreux et d'un dispositif sous vide connecté à l'espace se trouvant au dessus de la coulée dans le dispositif de fusion et traitement non ferreux. Ledit dispositif peut adopter la forme d'une chambre simple, de multiples chambres ou d'une structure sans chambre. Le procédé de raffinage de cette invention permet soit de remplir les conditions de respect de l'environnement, soit d'atteindre une haute efficacité, une économie d'énergie et une faible consommation. L'équipement de raffinage de cette invention peut faciliter la mise en oeuvre du procédé d'écrit.
PCT/CN2002/000741 2001-10-30 2002-10-22 Raffinage et equipement de coulee non ferreuse WO2003038138A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN01129841.3 2001-10-30
CN01198841 2001-10-30

Publications (1)

Publication Number Publication Date
WO2003038138A1 true WO2003038138A1 (fr) 2003-05-08

Family

ID=4678307

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2002/000741 WO2003038138A1 (fr) 2001-10-30 2002-10-22 Raffinage et equipement de coulee non ferreuse

Country Status (1)

Country Link
WO (1) WO2003038138A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004305A (zh) * 2019-05-30 2019-07-12 岳阳鑫特热能工程技术有限公司 一种铝液在线精炼装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340379A (en) * 1990-11-09 1994-08-23 Alcan International Limited Jet flow device for injecting gas into molten metal and process
EP1081240A1 (fr) * 1999-09-03 2001-03-07 Norsk Hydro Asa Dispositif à malaxeur pour le le traitement en continu de métaux liquides
CN1299883A (zh) * 2000-12-19 2001-06-20 上海交通大学 铝及铝合金熔体复合净化装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5340379A (en) * 1990-11-09 1994-08-23 Alcan International Limited Jet flow device for injecting gas into molten metal and process
EP1081240A1 (fr) * 1999-09-03 2001-03-07 Norsk Hydro Asa Dispositif à malaxeur pour le le traitement en continu de métaux liquides
CN1299883A (zh) * 2000-12-19 2001-06-20 上海交通大学 铝及铝合金熔体复合净化装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004305A (zh) * 2019-05-30 2019-07-12 岳阳鑫特热能工程技术有限公司 一种铝液在线精炼装置

Similar Documents

Publication Publication Date Title
CN102181658B (zh) 一种去除铝熔体中夹杂物的装置和方法
CN201077859Y (zh) 在线除气过滤机构
WO2003038138A1 (fr) Raffinage et equipement de coulee non ferreuse
CN209470512U (zh) 一种再生铝熔液静置炉
CN208333092U (zh) 带有净化系统的铝液保温炉
CN109207758B (zh) 一种铝合金工件熔炼铸造工艺
CN212976696U (zh) 一种工业硅冶炼抬包分配器
CN1386871A (zh) 工业离心机深床过滤铝熔体中夹杂物的设备
CN1224724C (zh) 有色金属熔液的净化方法及设备
CN108571892A (zh) 带有净化系统的铝液保温炉及其铝液温度的检测方法
CN113670068A (zh) 一种将废弃金属加工成铝合锭的冶炼炉
CN215113867U (zh) 一种高效率钢材熔化设备
CN110078078A (zh) 一种冶炼97金属硅的方法
CN1161481C (zh) 过滤净化铝熔体中非金属夹杂物的装置
CN201144273Y (zh) 一种恒温锌液流槽
WO2017084048A1 (fr) Dispositif de collecte de poussière pour orifice d'alimentation de four de fusion dédié à la production de lingots d'aluminium
CN216808926U (zh) 一种带有排烟装置的钢球加工用回火炉
CN219897480U (zh) 一种纯化炉含氟废气处理装置
CN217555824U (zh) 一种金属硅提纯装置
CN212720833U (zh) 一种含铜废料熔炼用竖向熔炼炉
CN218495802U (zh) 一种减少氧化损失的铝灰处理系统
CN101348866A (zh) 倾翻式铝液除气净化装置
CN214747216U (zh) 一种热洁炉自动补氧装置
CN213120013U (zh) 一种炼钢用原料处理竖炉
CN216282708U (zh) 一种浸入式竖插加热熔池铝液保温炉

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LU MC NL PT SE SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP