CN105950889B - A kind of electric arc furnaces vacuum refining magnesium system and its magnesium refining method - Google Patents
A kind of electric arc furnaces vacuum refining magnesium system and its magnesium refining method Download PDFInfo
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- CN105950889B CN105950889B CN201610496951.1A CN201610496951A CN105950889B CN 105950889 B CN105950889 B CN 105950889B CN 201610496951 A CN201610496951 A CN 201610496951A CN 105950889 B CN105950889 B CN 105950889B
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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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/04—Dry methods smelting of sulfides or formation of mattes by aluminium, other metals or silicon
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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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
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Abstract
Patent of the present invention discloses a kind of electric arc furnaces vacuum refining magnesium system; it is characterized in that the system includes sequentially connected grinding system, preheating decomposition system, calcination system, reheating system, vacuum reaction system, condensation collection system, magnesium refining method includes that preamble prepares, electric arc furnaces vacuum refines magnesium and terminates startup-shutdown three phases；The present invention decomposes the material containing magnesium powder after heating with grinding, it is molten into the molten bath of liquid in iron, after vacuum processing, it is filled with argon gas, sprays people's high temperature magnesium powder material, its reduction is set to generate magnesium steam, after magnesium steam is by collecting condensation, become magnesium liquid, forms crude magnesium, then refined to cast magnesium ingot, production process is reasonable, compact, coordinative composition of equipments, technique is complete, reaction process is fast, the time is short, production efficiency is high, reduces by 1/3 or more production cost.
Description
Technical field
The present invention relates to metal smelt system and method, and in particular to a kind of yield is high, and expense is low, makes low in the pollution of the environment
Electric arc furnaces vacuum refining magnesium system and its magnesium refining method.
Background technology
Magnesium is the metallic element that reserves are extremely abundant in the earth, accounts for about the 2.1%---2.7% of earth gross mass, China's storage
Amount is the global maximum country of magnesium resource reserves.Currently, having verified tens billion of tons.Magnesium and magnesium alloy have proportion small, and intensity is high,
Damping property is good, shock resistance, and machinability is good, and thermal conductivity is good, and recyclable regeneration, environmental pollution is few, has excellent environment
Advantage and performance advantage, use scope is extensive, is a kind of recyclable rare metal.Greatly develop magnesium industry in China and
The whole world has apparent resources advantage and the market advantage.
The production method of magnesium mainly has two class of magnesium chloride fused salt electrolysis process and thermal reduction at present.Currently, global magnesium yield
85% be all by the metal deoxidization in thermal reduction, i.e., " Pidgeon process " production.Thermal reduction is produced with metal deoxidization
In " Pidgeon process " for, at present production there are many deficiencies.1. heat conduction radius is big, heat loss is big, and environmental pollution is serious, reduction
Time is grown 12-14 hours；2. whole manual operations, field worker labor intensity is big, and efficiency is low；3. production cost is high, mainly deposit
In high energy consumption, reductive jar is of high cost, and recovery rate is low, and economic benefit is undesirable；4. scale continuous production cannot be formed, do not meet
The requirement of modern industry development.
Some countries utilize own resource condition, right using will produce chlorine in magnesium chloride fused salt electrolysis process production process
Personnel and environmental pollution and pollution, current this production method are rarely employed.
Currently, magnesium metal production in China's has accounted for the 85% of global share, big portion is produced using thermal reduction, i.e., " Pidgeon process "
Production.
It is reducing agent that " Pidgeon process " production technology of currently available technology, which is mainly using dolime as raw material, ferrosilicon,
Fluorite is catalyst, carries out batching.Balling-up, referred to as pelletizing are suppressed after grinding.Pelletizing is fitted into reductive jar, is heated to
1200 DEG C, inside is evacuated to 13.3Pa or higher, then generates magnesium steam.Magnesium steam is formed in the condenser of reductive jar front end
Crystalline Magnesium, also known as crude magnesium.Again through flux-refining, output commodity magnesium ingot, i.e., smart magnesium.Production of magnesium by pidgeonprocess production process production of magnesium by pidgeonprocess
Production process (1) dolomite calcination：Dolomite is heated to 1100~1200 DEG C in rotary kiln or shaft furnace, firing is forged white
(MgO·CaO).(2) dispensing ball：White, ferrosilicon powder and Fluorspar Powder batching, grinding will be forged, ball is then pressed into.(3) also
It is former：Pellet is heated to 1200+10 DEG C in reductive jar, at 13.3Pa or more high vacuum condition, is kept for 8~10 hours, oxygen
Change magnesium-reduced into magnesium steam, becomes crude magnesium after condensation.(4) ingot casting is refined：Crude magnesium is heated and is melted, under about 710 DEG C of high temperature, is used
After solvent refined, magnesium ingot is cast, also known as smart magnesium.(5) pickling：Magnesium ingot sulfuric acid or nitric acid are cleaned into surface, surface is removed and is mingled with,
Make surface aesthetic.(6) gas making workshop：Raw coal is converted into coal gas, is used as fuel.It is not made using the magnesium factory of raw coal directly
Gas workshop.
Chinese Patent Application No. is 95100495.6 in currently available technology, entitled electric furnace molten charge silicothermic reduction vacuum refining
Magnesium new process inherits " Pidgeon process " magnesium using ferrosilicon as reducing agent, in hot state, can restore magnesium this " Pidgeon process "
Core theory.By reduction reaction, i.e., magnesium steam is generated under the conditions of heating, magnesium liquid is then become by condenser, but specially
The sharp phase has failed, and remembers without Production Example, and be unable to continuous production.Chinese patent (201010255111.9), single unrestrained stain pipe silicon
Bath vacuum circular flow magnesium-smelting device and its method, the double unrestrained stain pipe silicon bath vacuum circular flow magnesium-smelting dresses of Chinese patent (201010255097.2)
It sets and its method and patent (201080000976.9) a kind of method and its equipment of vacuum circular flow melt magnesium-smelting silicothermic process.Needle
To refining at present, magnesium is backward in technique and production defect, it is proposed that the viewpoint of melt ferrosilicon process reduction refining magnesium, but due to single, double dip pipe
Circulation mechanism restrict it is high to silicon heating bath volume requirement, heating difficulty it is larger, slag tap and cause to be unable to continuous production, to scene
It is required that harsh, investment and production scale are very big, and in the environment of exposure air, magnesium metal recovery rate is low.
Invention content
For the problems of the prior art, the present invention provide it is a kind of make it more for the direct conditions of continuous production, can
Fully to make metal magnesium raw material be fully used from heating is decomposed, so that yield is high, expense is low, makes low in the pollution of the environment
Electric arc furnaces vacuum refines magnesium system and its magnesium refining method.
In order to achieve the above object, the technical scheme is that：
A kind of electric arc furnaces vacuum refining magnesium system, it is characterised in that：The system includes sequentially connected grinding system, preheating point
Solution system, reheating system, vacuum reaction system, condenses collection system at calcination system, is set in the condensation collection system
It is equipped with dust discharge gas gathering system；Wherein：
The grinding system include sequentially connected crusher, depots, the first elevator, the steady feed bin of bistrique, vertical mill,
Separator, the first deduster, the second elevator, the first material storage warehouse, separator are connected to the top of vertical mill, and with the first dedusting
Device, the first exhaust blower are sequentially connected in series while running through with products export, and the bottom of vertical mill is connected with the first air-introduced machine；
The preheating decomposition system includes measuring reamer and the first material storage warehouse is connect in grinding system bucket type by pipe
Elevator further includes preheating decomposition tower, cyclone dust collectors with the sequentially connected pan feeding screw conveyor of bucket elevator and level Four
It is connected in parallel on pan feeding screw conveyor with level Four preheating decomposition tower, the cyclone dust collectors top is connected with air blower, and lower end connects
It is connected to the second exhaust blower, air draft chimney is provided on air blower, the discharge outlet of cyclone dust collectors is provided with feed back reamer；
The calcination system includes with level Four preheating decomposition tower in rotary kiln coherent up and down, the tail portion burning of the rotary kiln
Room is arranged fuel gas injection rifle and with pressure fan multi pack, and combustion gas used in fuel gas injection rifle is provided by distal end combustion gas basin, rotary kiln
Kiln tail end is provided with the conveyer of material conveying, and conveyer one end is connected to third elevator, and another end device has preposition air-cooler,
Third elevator is connected on the second material storage warehouse；
The reheating system includes the heating tank being connect with the second material storage warehouse by Z-shaped embedded scraper transporter, with
Tank connected hot-blast stove is heated, the second material storage warehouse and heating tank are connected to by pipeline on the second deduster, heating tank tail portion
It is connected in vacuum reaction system by charging valve and conveying pipeline；
The vacuum reaction system includes being blown rifle by conveying pipeline and feed powder to connect with heating tank in reheating system
Vacuum arc furnace ignition, the fritting ferrosilicon liquid packet, the vacuum stove top case that are placed in vacuum arc furnace ignition, further include two or two be equipped with
Above ferrosilicon liquid packet, is loaded with fritting SiClx iron liquid in ferrosilicon liquid packet, and ferrosilicon liquid is wrapped to be provided on the electric arc stove top case in portion
Heating electrode device and Antaciron charge door, the vacuum arc furnace ignition are followed successively by external furnace body, insulating brick, vacuum reaction from outside to inside
The ferrosilicon liquid contained in room, fritting ferrosilicon liquid packet and fritting ferrosilicon liquid packet, vacuum stove top case are arranged on lifting gear, and should
Be provided with electrode heating apparatus on vacuum stove top case, be provided with residual cake valve on the slag notch of vacuum arc furnace ignition, vacuum arc furnace ignition and
Be provided with rotating and moving device of configuration-changeable between ferrosilicon liquid packet, vacuum arc furnace bottom is provided with translating device, the feed powder be blown rifle from
It is deep into vacuum arc furnace sidewall in ferrosilicon liquid, feed powder injection rifle is connected to peripheral hardware Argon valve, and with conveying pipeline and charging
Valve hands over arm to run through, and check-valves is equipped between Argon valve and feed powder injection rifle；
The condensation collection system includes being connect with vacuum drying oven upper cover in vacuum reaction system by magnesium steam transport tube
Magnesium steam assembly carrier, the check-valves being connect successively with magnesium steam assembly carrier, magnesium steam condensing trapping device, magnesium liquid are received
Collect tank, the magnesium steam condensing trapping device top is connected with the third deduster of dust discharge gas gathering system, the third deduster top
Portion is provided with vacuum suction device and cold water sprays device, which is connected to argon gas by purification for argon capturing device
On gas tank, shutter is distributed in third deduster alternate internal.
Further, the discharge port of the first depots is provided with adjusting flashboard, the discharging of the steady feed bin of bistrique in grinding system
Mouth is connected to by belted electronic balance on vertical mill.
Further, the second material storage warehouse discharge port is provided with bottom storehouse control valve, and heating tank discharge outlet is provided with charging
Valve is connected with the second air-introduced machine on heating tank, third exhaust blower is connected on the second deduster.
Further, the entrance of argon gas gas tank is provided with intake valve, and outlet is provided with argon gas delivery valve, and the argon gas is store
It is provided with safety valve on gas tank, magnesium liquid floss hole is provided on magnesium liquid collecting tank, third deduster bottom is provided with automatic gas-locking
Dust discharge valve.
The present invention discloses a kind of electric arc furnaces vacuum magnesium refining methods, it is characterised in for preparing including preamble, electric arc furnaces
Vacuum refines magnesium and terminates startup-shutdown three phases；
The preamble preparation stage includes：
Step 1: preparing reactant-contains magnesium slag：
1, grinding：First by magnesia ore (dolomite) through the crusher in crushing in grinding system, then through vertical mill powder
Mill ensures to examine 0.05-0.3mm of fineness, is put into the first material storage warehouse, and 2, pre- thermal decomposition：By the grinding material warp in the first material storage warehouse
Bucket elevator promotion be conveyed into level Four decompose preheating tower in thermally decomposed in advance, 3, calcining：Level Four is decomposed in preheating tower
Pre- thermal decomposition material slips into calcined by rotary kiln, so that calcium carbonate is overflowed, forms the forging white powder (main component containing magnesia 40%~46%
For Mgo, Cao), and forging white powder is delivered in third material storage warehouse through third elevator and stores, 4, heating：It will be in third material storage warehouse
Forging white powder be delivered in heating tank through " Z " type embedded scraper transporter, be again heated to 900 DEG C ± 150 DEG C, kept in for use；
Step 2: preparing reaction dissolvent-fritting ferrosilicon liquid：In the ferrosilicon liquid packet of outfit, measured according to capacity and ratio
Industrial silicon and 75% or so ferrosilicon is added, is inserted into heating electrode device, it is made to be fused into ferrosilicon liquid, at 1400 DEG C -- 1650 DEG C
Left and right heat preservation for standby use；
The electric arc furnaces vacuum refining magnesium stage includes：
Step 3: vacuum arc stove evacuation：Ferrosilicon liquid packet is placed in the true of vacuum arc furnace ignition with rotating and moving device of configuration-changeable
In empty reative cell, start the translating device of vacuum arc furnace base, keep it in place, then enable the lifting gear of vacuum stove top case,
Vacuum stove top case is covered, its vacuum reaction chamber is made to be fully sealed securely with vacuum stove top case, then utilizes vacuum suction device will
It is evacuated, vacuum pressure value 20-2500Pa；
Step 4: argon gas is filled：Argon valve is opened, backfills argon gas in the vacuum reaction room after being vacuumized to step 3, together
Shi Kaiqi electrode heating apparatus makes the boiling of ferrosilicon liquid and temperature be maintained at 1400-1650 DEG C, and argon gas is all full；
Step 5: addition reactant：Feed powder is blown rifle to be inserted into ferrosilicon liquid from vacuum arc furnace ignition side, and mixes argon gas
Magnesium slag after injection is heated in right amount into ferrosilicon liquid；Due to the effect of argon gas injection, keep magnesium slag abundant with ferrosilicon liquid
It is stirred, and displacement reduction reaction occurs at a high temperature of vacuum state and control range, generate magnesium steam；
Step 6: cooling collect：The magnesium steam that step 5 generates is along vacuum direction successively through the conveying of magnesium steam transport tube, magnesium
Steam assembles carrier carrying, check-valves, and then flows into temperature control in 650 ± 40 DEG C of magnesium steam condensing trapping device, the magnesium
Magnesium liquid (or drop) stream (drop) obtained in steam condensing trapping device enters in magnesium liquid collecting tank, pending to pour ingot or refining, true
Argon gas used in the smelting of outage temperature flows to argon gas air storage after gas third deduster is handled by purification for argon capturing device
Tank；
Step 7: scarfing cinder：After reduction reaction, the slag liquid in fritting ferrosilicon liquid packet is discharged by residual cake valve；
Step 8: according to next round operation, successively operation by turns is carried out the step of step 2~step 7；
The end startup-shutdown stage includes：
Step 9: vacuum reaction chamber is after reaction, closes feed powder and be blown rifle；Close Argon valve, electric arc furnaces successively again
Heating device, vacuum suction device, purification for argon capturing device, argon gas delivery valve, cold water sprays device, and make the gas of collection not
Generate secondary back；
Step 10: after seeing vacuum reaction chamber pressure from detecting instrument with atmospheric equilibrium, lifting gear is respectively started
And translating device, so that its vacuum reaction chamber is detached with vacuum stove top case, start rotating and moving device of configuration-changeable by with finish and yu ferrosilicon
Packet is replaced, respectively with regard to its position.
It should be noted that several equally distributed cold water sprays devices of top should be first opened before the work of third deduster,
Make water mist alternate covering in entire dust chamber, and improve the physics settlement action of dust using indoor water temperature, spray water is received certainly
Dirt wall and shutter the afflux cone bucket under expansion chamber are discharged into sedimentation basin by automatic gas-locking dust discharge valve timing, are weighed after cooling and purifying
It is multiple to utilize.
From the above, it can be seen that the present invention has following advantages：
The advantages of electric arc furnaces vacuum refining magnesium new method of the present invention, is to decompose the material containing magnesium powder after heating with grinding, in silicon
Iron is molten into the molten bath of liquid, after vacuum processing, is filled with argon gas, is sprayed people's high temperature material containing magnesium powder, it is made to generate magnesium steam, magnesium
After steam is by collecting condensation, become magnesium liquid, forms crude magnesium, it is then refined to cast magnesium ingot.So cycle can be formed continuous
Production, thermal energy are fully used, and production cost is greatly lowered.
Ferrosilicon liquid, temperature 1400 are melted in advance with silicon content 40%---75%C---1650C, best friend's direct-current arc is sent to heat
Device location after sealing, and keeps its temperature by electric arc heated, starts air-extractor, vacuum is formed it into, first to appearance
Argon gas is filled in device, after institute's applying argon gas saturation, starts to spray people 900 into ferrosilicon liquid packetc---1000cContent 20%---80%
Containing magnesium slag, in the boiling environment full of argon gas, magnesium slag generates reduction reaction, vacuum degree 200--- with ferrosilicon liquid
25000Pa, the magnesium steam after reaction is by magnesium vapour bogey, and by magnesium liquid chiller, then formation magnesium liquid passes through magnesium liquid
Receiving device is sent to magnesium liquid refining, is carried out refining cast or is directly produced other products, argon gas by cooling and dedusting device into
Row processing recycling.Production process of the present invention is reasonable, compact, coordinative composition of equipments, and technique is complete, and reaction process is fast, and the time is short, production effect
Rate is high, reduces by 1/3 or more production cost.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Attached drawing 1 is that the magnesia ore raw materials of the present invention produces the schematic diagram of preparation facilities；
Attached drawing 2 is the partial schematic diagram of attached drawing 1；
Attached drawing 3 is the partial schematic diagram of attached drawing 1；
Attached drawing 4 is the partial schematic diagram of attached drawing 1；
Attached drawing 5 is the structural schematic diagram for the electric arc furnaces vacuum magnesium smelting device for being the present invention；
Attached drawing 6 is the partial schematic diagram of attached drawing 5；
Attached drawing 7 is the partial schematic diagram of attached drawing 5；
Reference numeral is in figure：
101 crushers, 102 depots, 103 adjust flashboard, 104 first elevators, the steady feed bin of 105 bistriques, 106 electronics skins
Belt scale, 107 vertical mills, 108 separators, 109 first dedusters, 110 first exhaust blowers, 111 first air-introduced machines, 112 products go out
Mouth, 113 third elevators, 114 first material storage warehouses, 115 pipes metering reamer, 116 bucket elevators, 117 pan feeding helical feeds
Machine, 118 level Four decompose preheating tower, 119 second exhaust blowers, 120 cyclone dust collectors, 121 feed back reamers, 122 rotary kilns, 123 combustions
Gas jet rifle, 124 pressure fan, 125 conveyers, 126 preposition air-coolers, 127 air blowers, 128 air draft chimneys, 129 distal end combustion gas
Basin, 130 third elevators, 131 second material storage warehouses, 132 bottom storehouse control valves, 133 " Z " type embedded scraper transporters, 134 heating
Tank, 135 hot-blast stoves, 136 second air-introduced machines, 137 second dedusters, 138 third exhaust blowers, 139 charging valves, 140 conveying pipelines,
201 ferrosilicon liquid packets, 202 heating electrode devices, 203 electric arc stove top cases, 204 fritting SiClx iron liquids, 205 Antaciron charge doors,
301 vacuum arc furnace ignitions, 302 insulating bricks, 303 vacuum reaction chambers, 304 fritting ferrosilicon liquid packets, 305 ferrosilicon liquid, the injection of 306 feed powders
Rifle, 307 Argon valves, 308 check-valves, 309 vacuum stove top cases, 310 electrode heating apparatus, 311 lifting gears, 312 translating devices,
313 rotating and moving device of configuration-changeable, 401 magnesium steam transport tubes, 402 magnesium steam assemble carrier, 403 check-valves, 404 magnesium steam and condense and catch
Acquisition means, 405 magnesium liquid collecting tanks, 406 metal magnesium liquids, 407 magnesium liquid floss holes, 408 third dedusters, 409 vacuum suctions dress
Set, 410 purification for argon capturing devices, 411 argon gas gas tanks, 412 safety valves, 413 argon gas delivery valves, 414 automatic gas-locking dust discharges
Valve, 415 cold water sprays devices, 416 shutters.
Specific implementation mode
Invention is further explained with reference to the accompanying drawings and examples.
As shown in figure 1 and 2, present embodiment discloses a kind of vaccum sensitive stoves to refine magnesium system, including sequentially connected powder
Grinding system, preheating decomposition system, calcination system, reheating system, vacuum reaction system, condensation collection system, described is cold
It is provided with dust discharge gas gathering system in solidifying collection system；Wherein：
The grinding system includes that sequentially connected crusher 101, depots 102, the first elevator 104, bistrique are surely expected
Storehouse 105, vertical mill 107, separator 108, the first deduster 109, the second elevator 113, the first material storage warehouse 114, separator 108
Be connected to the top of vertical mill 107, and with the first deduster 109, the first exhaust blower 110 be sequentially connected in series simultaneously with products export
112 run through, and the bottom of vertical mill 107 is connected with the first air-introduced machine 111；The preheating decomposition system includes measuring to cut with scissors by pipe
Knife 115 and the bucket elevator 116 that the first material storage warehouse 114 is connect in grinding system, further include connecting successively with bucket elevator 116
Pan feeding screw conveyor 117 and level Four the preheating decomposition tower 118 connect, cyclone dust collectors 120 are in parallel with level Four preheating decomposition tower 118
On pan feeding screw conveyor 117,120 top of the cyclone dust collectors is connected with air blower 127, and lower end is connected with the second air draft
Machine 119 is provided with air draft chimney 128 on air blower 127, and the discharge outlet of cyclone dust collectors 120 is provided with feed back reamer 121；
The calcination system includes with level Four preheating decomposition tower 118 in rotary kiln 122 coherent up and down, the rotary kiln 122
Tail portion combustion chamber setting fuel gas injection rifle 123 and with 124 multi pack of pressure fan, combustion gas used in fuel gas injection rifle 123 is by distally firing
Gas-reservoir tank 129 provides, and the kiln tail end of rotary kiln 122 is provided with the conveyer 125 of material conveying, and 125 one end of conveyer is connected to the
Three elevators 130, another end device have preposition air-cooler 126, third elevator 130 to be connected on the second material storage warehouse 131；It is described
Reheating system includes the heating tank 134 being connect with the second material storage warehouse 131 by Z-shaped embedded scraper transporter 133, with heating
The hot-blast stove 135 that tank 134 connects, the second material storage warehouse 131 and heating tank 134 are connected to by pipeline on the second deduster 137,
134 tail portion of heating tank is connected to by charging valve 139 and conveying pipeline 140 in vacuum reaction system；
The vacuum reaction system includes being blown rifle 306 by conveying pipeline 140 and feed powder to heat with reheating system
The vacuum arc furnace ignition 301 of the connection of tank 134, fritting ferrosilicon liquid packet 304, the vacuum stove top case 309 being placed in vacuum arc furnace ignition 301,
Further include the two or more ferrosilicon liquid packets 201 being equipped with, fritting SiClx iron liquid 204, silicon are loaded in ferrosilicon liquid packet 201
It is provided with heating electrode device 202 and Antaciron charge door 205 on the electric arc stove top case 203 on 201 top of iron liquid packet, the vacuum
Electric arc furnaces 301 is followed successively by external furnace body, insulating brick 302, vacuum reaction chamber 303, fritting ferrosilicon liquid packet 304 and fritting from outside to inside
The ferrosilicon liquid 305 contained in ferrosilicon liquid packet 304, vacuum stove top case 309 is arranged on lifting gear 311, and the vacuum stove top case
It is provided with electrode heating apparatus 310 on 309, residual cake valve 314, vacuum arc furnace ignition are provided on the slag notch of vacuum arc furnace ignition 301
Rotating and moving device of configuration-changeable 313 is provided between 301 and ferrosilicon liquid packet 201,301 bottom of vacuum arc furnace ignition is provided with translating device 312,
The feed powder injection rifle 306 is deep into from 301 side wall of vacuum arc furnace ignition in ferrosilicon liquid 305, which is blown rifle 306 and peripheral hardware
Argon valve 307 is connected to, and hands over arm to run through with conveying pipeline 140 and charging valve 139, is pacified between Argon valve 307 and feed powder injection rifle 306
Equipped with check-valves 308；
The condensation collection system includes by magnesium steam transport tube 401 and vacuum stove top case 309 in vacuum reaction system
The magnesium steam of connection assembles carrier 402, assembles check-valves 403, magnesium steam that carrier 402 is connect with magnesium steam successively and condenses
Capturing device 404, magnesium liquid collecting tank 405,404 top of magnesium steam condensing trapping device are connected with the of dust discharge gas gathering system
Three dedusters 408,408 top of third deduster are provided with vacuum suction device 409 and cold water sprays device 415, which takes out
Device of air 409 is connected to by purification for argon capturing device 410 on argon gas gas tank 411,408 alternate internal of third deduster point
It is furnished with shutter 416.
Further, the discharge port of the first depots 102 is provided with and adjusts flashboard 103, the steady feed bin of bistrique in grinding system
105 discharge port is connected to by belted electronic balance 106 on vertical mill 107.
Further, 131 discharge port of the second material storage warehouse is provided with bottom storehouse control valve 132, and 134 discharge outlet of heating tank is set
It is equipped with charging valve 139, the second air-introduced machine 136 is connected on heating tank 134, third exhaust blower is connected on the second deduster 137
138。
Further, the entrance of argon gas gas tank 411 is provided with intake valve, and outlet is provided with argon gas delivery valve 413, and should
It is provided with safety valve 412 on argon gas gas tank 411, magnesium liquid floss hole 407, third deduster are provided on magnesium liquid collecting tank 405
408 bottoms are provided with automatic gas-locking dust discharge valve 414.
The present embodiment also discloses a kind of electric arc furnaces vacuum magnesium refining method, it is characterised in for preparing including preamble, electric arc
Stove vacuum refines magnesium and terminates startup-shutdown three phases；
The preamble preparation stage includes：
Step 1: preparing reactant-contains magnesium slag：
1, grinding：It is first that magnesia ore (dolomite) is broken through the crusher 101 in grinding system, then through vertical mill
107 grindings ensure to examine 0.05-0.3mm of fineness, are put into the first material storage warehouse 114,2, thermally decompose in advance：By the first material storage warehouse 114
In grinding material through bucket elevator 116 promotion be conveyed into level Four decompose preheating tower 118 in thermally decomposed in advance, 3, calcining：It will
Level Four decomposes the pre- thermal decomposition material in preheating tower 118 and slips into the calcining of rotary kiln 122, and calcium carbonate is made to overflow, and is formed and contains magnesia
40%~46% forging white powder (main component Mgo, Cao), and forging white powder is delivered to third bin stock through third elevator 130
Stored in library 131,4, heating：Forging white powder in third material storage warehouse 131 is delivered to heating through " Z " type embedded scraper transporter 133
In tank 134,900 DEG C ± 150 DEG C are again heated to, is kept in for use；
Step 2: preparing reaction dissolvent-fritting ferrosilicon liquid：In the ferrosilicon liquid packet 201 of outfit, according to capacity and ratio meter
Industrial silicon and 75% or so ferrosilicon is added in amount, is inserted into heating electrode device 202, it is made to be fused into ferrosilicon liquid, at 1400 DEG C --
1650 DEG C or so heat preservation for standby use；
The electric arc furnaces vacuum refining magnesium stage includes：
Step 3: vacuum arc furnace ignition 301 vacuumizes：Ferrosilicon liquid packet 201 is placed in vacuum electric with rotating and moving device of configuration-changeable 313
In the vacuum reaction chamber 303 of arc stove 301, start the translating device 312 of 301 pedestal of vacuum arc furnace ignition, keep it in place, then enables true
The lifting gear 311 of empty stove top case, covers vacuum stove top case 309, keeps its vacuum reaction chamber 303 complete with vacuum stove top case 309
Sealing is secured, is then evacuated using vacuum suction device 409, vacuum pressure value 20-2500Pa；
Step 4: argon gas is filled：Argon valve 307 is opened, argon is backfilled in the vacuum reaction chamber 303 after being vacuumized to step 3
Gas, while electrode heating apparatus 310 is opened, make the boiling of ferrosilicon liquid and temperature is maintained at 1400-1650 DEG C, and argon gas all fills
It is full of；
Step 5: addition reactant：Feed powder is blown rifle 306 to be inserted into ferrosilicon liquid 305 from 301 side of vacuum arc furnace ignition,
And it mixes argon gas and is blown the magnesium slag after heating in right amount into ferrosilicon liquid 305；Due to the effect of argon gas injection, make magnesium slag and silicon
Iron liquid 305 is thoroughly mixed, and displacement reduction reaction occurs at a high temperature of vacuum state and control range, generates magnesium
Steam；
Step 6: cooling collect：The magnesium steam that step 5 generates is defeated through magnesium steam transport tube 401 successively along vacuum direction
It send, magnesium steam assembles the carrying of carrier 402, check-valves 403, and then flows into magnesium steam condensing trapping of the temperature control at 650 ± 40 DEG C
In device 404, magnesium liquid (or drop) stream (drop) obtained in the magnesium steam condensing trapping device 404 enters in magnesium liquid collecting tank 405, waits for
It carries out pouring ingot or refining, the argon gas used in the smelting of vacuum high-temperature is trapped through gas third deduster 408 by purification for argon
Argon gas gas tank 411 is flowed to after the processing of device 410；
Step 7: scarfing cinder：After reduction reaction, the slag liquid in fritting ferrosilicon liquid packet 304 is passed through into 314 row of residual cake valve
Go out；
Step 8: according to next round operation, successively operation by turns is carried out the step of step 2~step 7；
The end startup-shutdown stage includes：
Step 9: vacuum reaction chamber is after reaction, closes feed powder and be blown rifle 306；Close Argon valve, electric arc successively again
Stove heat device, vacuum suction device 409, purification for argon capturing device 410, argon gas delivery valve 413, cold water sprays device 415, and
The gas of collection is set not generate secondary back；
Step 10: after seeing 303 pressure of vacuum reaction chamber from detecting instrument with atmospheric equilibrium, lifting dress is respectively started
311 and translating device 312 are set, its vacuum reaction chamber 303 is made to be detached with vacuum stove top case 309, starting rotating and moving device of configuration-changeable 313 will
With Bi He the ferrosilicon packet of yu is replaced, respectively with regard to its position.
It should be noted that third deduster 408 should first open several equally distributed cold water sprays of top before working
Device 415 makes water mist alternate covering in entire dust chamber, and the physics settlement action of dust is improved using indoor water temperature, spraying
Water is discharged into sedimentation basin from wall and shutter the afflux cone bucket under expansion chamber of gathering dust by 414 timing of automatic gas-locking dust discharge valve, cooling
It is reused after purification.
So cycle, can form continuous production, thermal energy is fully used, and production cost is greatly lowered.Thereon
Startup-shutdown program in step stops after that generally first starts want；Conversely, the equipment stopped afterwards then needs first to start.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
Technical solution described in inventive embodiments, it will be understood by those of ordinary skill in the art that, still the present invention can be carried out
Modification or equivalent replacement, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (4)
1. a kind of electric arc furnaces vacuum refines magnesium system, it is characterised in that：The system includes sequentially connected grinding system, pre- thermal decomposition
System, reheating system, vacuum reaction system, condenses collection system at calcination system, is arranged in the condensation collection system
There is dust discharge gas gathering system；Wherein：
The grinding system includes that sequentially connected crusher (101), depots (102), the first elevator (104), bistrique are steady
Feed bin (105), vertical mill (107), separator (108), the first deduster (109), the second elevator (113), the first material storage warehouse
(114), separator (108) is connected to the top of vertical mill (107), and with the first deduster (109), the first exhaust blower (110)
It is sequentially connected in series while running through with products export (112), the bottom of vertical mill (107) is connected with the first air-introduced machine (111)；
The preheating decomposition system includes measuring reamer (115) by pipe to connect with the first material storage warehouse (114) in grinding system
Bucket elevator (116), further include with the sequentially connected pan feeding screw conveyor (117) of bucket elevator (116) and level Four
Decomposition tower (118) is preheated, cyclone dust collectors (120) are connected in parallel on pan feeding screw conveyor (117) with level Four preheating decomposition tower (118)
On, cyclone dust collectors (120) top is connected with air blower (127), and lower end is connected with the second exhaust blower (119), air blower
(127) air draft chimney (128) is provided on, the discharge outlet of cyclone dust collectors (120) is provided with feed back reamer (121)；
The calcination system includes with level Four preheating decomposition tower (118) in rotary kiln (122) coherent up and down, the rotary kiln
(122) tail portion combustion chamber setting fuel gas injection rifle (123) and with pressure fan (124) multi pack, fuel gas injection rifle (123) combustion used
Gas is provided by distal end combustion gas basin (129), and the kiln tail end of rotary kiln (122) is provided with the conveyer (125) of material conveying, conveyer
(125) one end is connected to third elevator (130), and another end device has preposition air-cooler (126), and third elevator (130) is even
It is connected on the second material storage warehouse (131)；
The reheating system includes the heating being connect with the second material storage warehouse (131) by Z-shaped embedded scraper transporter (133)
Tank (134), the hot-blast stove (135) being connect with heating tank (134), the second material storage warehouse (131) and heating tank (134) pass through pipeline
It is connected on the second deduster (137), heating tank (134) tail portion is connected to vacuum by charging valve (139) and conveying pipeline (140)
On reaction system；
The vacuum reaction system includes being blown rifle (306) by conveying pipeline (140) and feed powder to heat with reheating system
The vacuum arc furnace ignition (301) of tank (134) connection, fritting ferrosilicon liquid packet (304), the vacuum drying oven being placed in vacuum arc furnace ignition (301)
Upper cover (309) further includes the two or more ferrosilicon liquid packets (201) being equipped with, fritting is loaded in ferrosilicon liquid packet (201)
SiClx iron liquid (204) is provided with heating electrode device (202) and silicon on the electric arc stove top case (203) on ferrosilicon liquid packet (201) top
Ferroalloy charge door (205), the vacuum arc furnace ignition (301) are followed successively by external furnace body, insulating brick (302), vacuum reaction from outside to inside
The ferrosilicon liquid (305) contained in room (303), fritting ferrosilicon liquid packet (304) and fritting ferrosilicon liquid packet (304), vacuum stove top case
(309) it is arranged on lifting gear (311), and electrode heating apparatus (310), vacuum is provided on the vacuum stove top case (309)
It is provided with residual cake valve (314) on the slag notch of electric arc furnaces (301), is arranged between vacuum arc furnace ignition (301) and ferrosilicon liquid packet (201)
There are rotating and moving device of configuration-changeable (313), vacuum arc furnace ignition (301) bottom to be provided with translating device (312), the feed powder is blown rifle
(306) it is deep into ferrosilicon liquid (305) from vacuum arc furnace ignition (301) side wall, which is blown rifle (306) and peripheral hardware Argon valve
(307) it is connected to, and same conveying pipeline (140) and charging valve (139) hand over arm to run through, in Argon valve (307) and feed powder injection rifle (306)
Between check-valves (308) is installed；
The condensation collection system includes by magnesium steam transport tube (401) and vacuum stove top case (309) in vacuum reaction system
The magnesium steam of connection assembles carrier (402), assembles check-valves (403), magnesium that carrier (402) is connect with magnesium steam successively and steams
Vapour condensing trapping device (404), magnesium liquid collecting tank (405), magnesium steam condensing trapping device (404) top are connected with dust discharge
The third deduster (408) of gas gathering system, the third deduster (408) top are provided with vacuum suction device (409) and cold water
Sprayer (415), the vacuum suction device (409) are connected to argon gas gas tank (411) by purification for argon capturing device (410)
On, shutter (416) is distributed in third deduster (408) alternate internal.
2. a kind of electric arc furnaces vacuum according to claim 1 refines magnesium system, it is characterised in that：In the grinding system
The discharge port of one depots (102), which is provided with, adjusts flashboard (103), and the discharge port of the steady feed bin of bistrique (105) passes through electronic belt
Scale (106) is connected on vertical mill (107).
3. a kind of electric arc furnaces vacuum according to claim 1 refines magnesium system, it is characterised in that：Second material storage warehouse
(131) discharge port is provided with bottom storehouse control valve (132), and heating tank (134) discharge outlet is provided with charging valve (139), heating
It is connected with the second air-introduced machine (136) on tank (134), third exhaust blower (138) is connected on the second deduster (137).
4. a kind of electric arc furnaces vacuum according to claim 1 refines magnesium system, it is characterised in that：The argon gas gas tank
(411) entrance is provided with intake valve, and outlet is provided with argon gas delivery valve (413), and is provided on the argon gas gas tank (411)
Safety valve (412) is provided with magnesium liquid floss hole (407) on magnesium liquid collecting tank (405), and third deduster (408) bottom is provided with
Automatic gas-locking dust discharge valve (414).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610496951.1A CN105950889B (en) | 2016-06-29 | 2016-06-29 | A kind of electric arc furnaces vacuum refining magnesium system and its magnesium refining method |
| PCT/CN2016/099112 WO2018000587A1 (en) | 2016-06-29 | 2016-09-14 | Vacuum induction furnace, electric arc furnace vacuum magnesium refining system and magnesium refining method thereof |
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| CN201610496951.1A CN105950889B (en) | 2016-06-29 | 2016-06-29 | A kind of electric arc furnaces vacuum refining magnesium system and its magnesium refining method |
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| CN105950889B true CN105950889B (en) | 2018-10-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109022826B (en) * | 2018-10-19 | 2023-11-24 | 西安银研镁业装备有限公司 | Reduction and refining integrated smelting system |
| CN111380359A (en) * | 2018-12-29 | 2020-07-07 | 江苏中圣园科技股份有限公司 | Double-heat-source rotational flow flash calcination system and double-heat-source rotational flow flash calcination method |
| CN111270088B (en) * | 2020-02-10 | 2023-10-13 | 中国恩菲工程技术有限公司 | System and method for continuously smelting magnesium by liquid stirring through induction heating |
| CN113073211A (en) * | 2021-03-17 | 2021-07-06 | 西安交通大学 | Method for directly reducing powder into magnesium metal under inert gas carrying |
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| US4015978A (en) * | 1975-02-21 | 1977-04-05 | Showa Denko Kabushiki Kaisha | Method for production of magnesium-containing briquets and magnesium |
| CN101906544A (en) * | 2010-08-17 | 2010-12-08 | 牛强 | Double-dip pipe ferrosilicon bath vacuum circular flow magnesium-smelting device and method thereof |
| CN103882246A (en) * | 2014-01-08 | 2014-06-25 | 中国重型机械研究院股份公司 | Vacuum magnesium manufacturing device and vacuum magnesium manufacturing method |
| CN203683634U (en) * | 2014-01-08 | 2014-07-02 | 中国重型机械研究院股份公司 | Vacuum magnesium smelting device |
| CN104087752A (en) * | 2014-07-28 | 2014-10-08 | 北京中冶设备研究设计总院有限公司 | Vacuum tank type smelting equipment and method for magnesium, zinc, lead and lithium metals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5836656B2 (en) * | 1979-04-23 | 1983-08-10 | 日本重化学工業株式会社 | Manufacturing method of magnesium metal |
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|---|---|---|---|---|
| US4015978A (en) * | 1975-02-21 | 1977-04-05 | Showa Denko Kabushiki Kaisha | Method for production of magnesium-containing briquets and magnesium |
| CN101906544A (en) * | 2010-08-17 | 2010-12-08 | 牛强 | Double-dip pipe ferrosilicon bath vacuum circular flow magnesium-smelting device and method thereof |
| CN103882246A (en) * | 2014-01-08 | 2014-06-25 | 中国重型机械研究院股份公司 | Vacuum magnesium manufacturing device and vacuum magnesium manufacturing method |
| CN203683634U (en) * | 2014-01-08 | 2014-07-02 | 中国重型机械研究院股份公司 | Vacuum magnesium smelting device |
| CN104087752A (en) * | 2014-07-28 | 2014-10-08 | 北京中冶设备研究设计总院有限公司 | Vacuum tank type smelting equipment and method for magnesium, zinc, lead and lithium metals |
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