CN103882246B - Vacuum magnesium manufacturing device and vacuum magnesium manufacturing method - Google Patents
Vacuum magnesium manufacturing device and vacuum magnesium manufacturing method Download PDFInfo
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- CN103882246B CN103882246B CN201410008089.6A CN201410008089A CN103882246B CN 103882246 B CN103882246 B CN 103882246B CN 201410008089 A CN201410008089 A CN 201410008089A CN 103882246 B CN103882246 B CN 103882246B
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Abstract
The invention specifically relates to a vacuum magnesium manufacturing device and a vacuum magnesium manufacturing method. The device comprises a silicon iron ladle, a vacuum reaction chamber, an argon blowing stirring unit, a slag receiving disc, a translation device, a lifting device, a silicon iron liquid heating device, a magnesium ore powder injection gun, a magnesium vapor cold trap, a magnesium liquid collector, a cooling and dust collecting device, a vacuum system and the like. The method comprises the process as follows: a silicon iron liquid in which the silicon content is 35%-75% is heated to a reaction temperature ranging from 1300 to 1600 DEG C, the silicon iron liquid is mixed with a magnesium ore powder injected into the silicon iron liquid and then a reduction reaction of the mixture is completed under the stirring action of blowing argon at a vacuum degree ranging from 350 to 20000 Pa, the magnesium vapor generated in the reaction is condensed into the magnesium liquid by a condenser and then the magnesium liquid is stored in a magnesium liquid tank before being cast into a magnesium ingot, and then the magnesium ingot is refined according to a conventional process. The vacuum magnesium manufacturing device has the advantages of energy conservation, environmental friendliness, high production efficiency, flexible investment scale and the like.
Description
Technical field
The present invention is specifically related to a kind of vacuum magnesium smelting device, also comprises a kind of vacuum magnesium refining method.
Background technology
Magnesium is one of metallic element of very enriching of occurring in nature reserves, and the country that to be global magnesium resource reserves maximum of China.Because magnesium and alloy thereof have quality gently, specific tenacity is high, and thermal conductivity is good, is easy to reclaim, and environmental pollution is little.Now being widely used in the fields such as automobile making, mechano-electronic, space flight and aviation, defence and military, is rare green material.Greatly develop magnesium industry and have advantageous resources advantage in China.
The production method of magnesium mainly contains hot reducing method and electrolytic process two class, and at present, about 80% of global magnesium output is produced by " Pidgeon process " in hot reducing method.But, there is many defects in existing " Pidgeon process " process for smelting magnesium, be mainly reflected in: 1. adopt coal or coal gas equal energy source directly to carry out flame tank external heat in an atmosphere to the reductive jar filling pelletizing, thermosteresis is large, heating efficiency is low, the reductive jar life-span is short, and heat is difficult to the material center that is delivered to fast in reductive jar, make long reaction time, environmental pollution is serious.2. the accumbency arrangement mode of tens reductive jar, such that labor strength production capacity that is very large and single devices is little, production cost is high.3. " Pidgeon process " refines the material in its reduction reaction technological process of magnesium is " Gu Gu/" reaction; Thus its speed of response is restricted, and reaches 12 hours reaction time, and production efficiency is extremely low.
Electrolytic method magnesium smelting; Its technological process can produce a large amount of chlorine, works the mischief and pollute operator and environment, brings the environmental issue being difficult to overcome, therefore there be limited evidence currently of uses this method.
The former magnesium output of current China has accounted for the share in the whole world about 80%, almost all adopts " Pidgeon process " to produce.
Defect for existing " Pidgeon process " magnesium-smelting production technology: the patent such as " Inner Heating Magnesium Refining Production Technology And Apparatus (CN1163622C) " and " pipe type thermal method magnesium-smelting production technology and equipment (CN1042841C) thereof " proposes the equipment and technics of refining magnesium continuously, but these techniques have still continued the mode of coal or heated by gas, thoroughly do not solve the problem of flue dust pollution on the environment.The defective workmanship that Chinese patent (201010255097.2) " double-dip pipe ferrosilicon bath vacuum circular flow magnesium-smelting devices and methods therefor " and patent (201010255111.9) " single-dip pipe silicon iron bath vacuum circulated magnesium-smelting devices and methods therefor " refine magnesium production for tradition " Pidgeon process " has carried out revolutionary innovation, but due to the restriction of soaking tub circulation mechanism, certain requirement is had to the circulation volume of ferrosilicon bath, so have higher capital investment requirements to industry size, in addition because ferrosilicon bath outside soaking tub is exposed to air, the recovery rate of magnesium in technological process, certainly will be reduced.
Summary of the invention
The object of the invention is, for the drawback in existing refining magnesium technology, to design a kind of more perfect vacuum magnesium smelting device and method thereof.
For this reason, the invention provides a kind of vacuum magnesium smelting device, comprising:
A vacuum reaction device, it vacuum chamber upper cover comprising vacuum reaction chamber, be arranged on the ferrosilicon bag of vacuum reaction chamber interior and be arranged on vacuum reaction chamber top, on described vacuum chamber, tops has heating unit mount pad, vacuum chamber covers temperature measuring equipment is housed, heating unit mount pad is connected with ferrosilicon liquid heating unit;
At least a set of airtight magnesium slag injection conveyor, comprise the magnesium slag winding-up rifle that ferrosilicon bag is stretched in one end, magnesium slag winding-up rifle is provided with blowing valve, and magnesium slag winding-up rifle is positioned at blowing valve downstream, is connected with batch can by charging valve;
A set of argon gas winding-up agitating unit, comprises and penetrates vacuum reaction chamber and Argon agitating unit bottom UNICOM's ferrosilicon bag and be arranged in the Argon valve of Argon agitating unit;
A set of magnesium liquid is collected and storing unit, comprises the magnesium vapor condensation trap connecting vacuum reaction chamber and the magnesium collection being connected to magnesium vapor condensation trap;
And a set of vacuum suction device being connected to magnesium vapor condensation trap air outlet.
Described vacuum magnesium smelting device also comprises a set of cooling and dedusting device, and described cooling and dedusting device is arranged between magnesium vapor condensation trap and vacuum suction device.
Described vacuum reaction chamber bottom is connected with lifting device, and lifting device is arranged on translating device.
Described vacuum chamber top cap is connected to lifting device and translating device.
Described ferrosilicon liquid heating unit is AC and DC electric arc heating unit, induction heating unit, heating plasma unit or electrical resistor heating element.
Described vacuum reaction device also comprises the dreg-containing disk being positioned at vacuum reaction chamber inner bottom surface, and described ferrosilicon bag side wall upper part has excessive cinder notch.
Described magnesium slag injection conveyor has at least a set of vacuum batch can and charging valve to be installed in parallel, jet different powders and interpolation ferrosilicon, and the outlet of described breeze winding-up rifle is inserted in the ferrosilicon liquid in ferrosilicon bag.
Described magnesium vapor condensation trap is single " U " shape pipe or multiple " U " shape pipe series and parallel unitized construction, shell material is that Gr25Ni20 steel plate rolls and is welded, be communicated with vacuum chamber upper cover, magnesium collection and cooling and dedusting device by joint flange, magnesium collection bottom surface has liquid outlet.
Described vacuum suction device is Roots/rotary pump with liquid ring group, mechanical pump/oily topping-up pump group, multistage steam-jet pump group or Direct airexhaust Roots pump group.
Trap filter magnesium cylinder is housed in the pipeline after magnesium liquid condensing trap, before cooling and dedusting device, and dust discharge valve is equipped with in described cooling and dedusting device lower end, and upper end is connected with described vacuum suction device by joint flange.
Described vacuum reaction chamber, shell is formed by Plate Welding, and steel plate material is 20g or 16MnR steel, and shell steel plate thickness is at least 16mm; The liner of described vacuum reaction chamber is magnesia fireproof insulating brick; Have Heat preservation element in vacuum chamber upper cover, the liner of vacuum chamber upper cover is alumina firebrick; Vacuum chamber upper cover is except end socket is identical with vacuum reaction chamber enclosure material, and its hot operation district, top steel plate material is Gr25Ni20.
Apply a magnesium refining method for described vacuum magnesium smelting device, comprise the following steps:
1): the ferrosilicon that ferrosilicon solution is housed is packaged into vacuum reaction indoor, run translating device and lifting device, vacuum reaction chamber and vacuum chamber upper cover are sealed completely;
2): after vacuum magnesium smelting device internal gas pressure is evacuated to 67Pa by startup vacuum suction device, in vacuum magnesium smelting device, backfill argon gas;
3): in ferrosilicon bag, add 75# ferrosilicon, starting heating unit makes ferrosilicon liquid temp remain on 1350 ~ 1600 DEG C, rifle of being jetted by magnesium slag inserts in the ferrosilicon liquid of 200 ~ 500mm bottom ferrosilicon bag, and open blowing valve and charging valve by magnesium slag winding-up rifle to blowing magnesium breeze in ferrosilicon liquid, again by Argon agitating unit argon bottom-blowing, make magnesium slag and ferrosilicon liquid fully mixing in ferrosilicon bag, concurrent raw reduction reaction; First the magnesium steam produced enter temperature control in the magnesium vapor condensation trap of 660 ~ 700 DEG C along vacuum pneumatic direction, condenses into magnesium liquid and flow in magnesium collection.
Described magnesium refining method, also comprises
4): after question response terminates, promote and close magnesium slag winding-up rifle, close vacuum pump set, carry out argon gas backfill, adjustment BOTTOM ARGON BLOWING flow, residue in alloy solution is floated discharge as far as possible, after pressure and atmospheric equilibrium, start lifting device and translating device, vacuum reaction chamber is separated with vacuum chamber upper cover.
Described magnesium refining method, also comprises preorder preparatory process:
The first step: ready reaction thing, calcined dolomite, lime, light-burned bauxite are mixed, and adopt ore mill grinding, ensure that granularity is 0.02 ~ 0.5mm, then 800 ~ 1000 DEG C are preheated to by pre-heating system, loading the batch can that dusts keeps in stand-by, by 75# ferrosilicon particle, loads in alloy feed bin after preheating;
Second step: prepare solvent, in smelting furnace, the ferro-silicon of be mixed into by 45# ferrosilicon and 75# ferrosilicon siliceous 35% ~ 75% melted and be warming up to 1300 ~ 1450 DEG C, then pouring in ferrosilicon bag.
With other refine magnesium equipment with and process for smelting magnesium compare, the present invention has the following advantages:
(1) use clean electric energy to provide thermal source for process for smelting magnesium, adopt " external heating " process for smelting magnesium of coal or heated by gas relative to other, overcome problem of environmental pollution.
(2) adopt " synthesis by internal resistance electric melting " process for smelting magnesium, relative to the tank external heat of " Pidgeon process " process for smelting magnesium, greatly improve heating efficiency, effectively reduce production cost.
(3) process for smelting magnesium process is " solid-liquid " reduction reaction, and with " Gu Gu/" reacting phase ratio of " Pidgeon process " process for smelting magnesium, fully, material reaction area is large, sufficient reacting, thus accelerates speed of response, improves production efficiency greatly in reaction mass mixing.
(4) apparatus of the present invention main equipment adopts the manufacture of plain carbon stool material, does not need expensive high temperature steel reductive jar, saves refining magnesium cost.
(5), compared with the process for smelting magnesium known altogether with other, this device is controlled by strict zone temperature, directly obtains liquid magnesium, greatly improves the recovery rate of magnesium.
(6) adopt wet dust separater, complete closed cycle dedusting, dust zero discharge in technological process, meets the environmental requirement of industrialization completely.
(7) every supporting technology mature and reliable, industry size is changeable, investment flexibility.
(8) this device process for smelting magnesium uses for reference the smelting technology of steel industry maturation, easily realizes equipment intellectually and automatically, greatly reduces the labour intensity of operator, effectively ensure that the security of plant running.
(9) tank/bag synthesis by internal resistance electric melting process for smelting magnesium is perfect, and debris final in ferrosilicon bag can obtain byproduct by simple art breading, improves byproduct recycle.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Description of reference numerals: 101, ferrosilicon liquid; 102, ferrosilicon bag; 103, vacuum reaction chamber; 104, magnesia fireproof insulating brick; 105, Argon agitating unit; 106, Argon valve; 107, dreg-containing disk; 108, lifting device; 109, translating device; 110, overflow cinder notch; 201, batch can; 202, charging valve; 203, blowing valve; 204, magnesium slag winding-up rifle; 205, vacuum chamber upper cover; 206, ferrosilicon liquid heating unit; 207, heating unit mount pad; 208, temperature measuring equipment; 209, alumina firebrick; 301, joint flange; 302, magnesium vapor condensation trap; 303, joint flange; 304, liquid outlet; 305, magnesium collection; 401, joint flange; 402, cooling and dedusting device; 403, dust discharge valve; 404, joint flange; 405, trap filter magnesium cylinder; 501, vacuum suction device.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated, but be used for anything but limiting the scope of the invention.
A kind of vacuum magnesium smelting device, as shown in Figure 1, comprising:
A vacuum reaction device, it vacuum chamber upper cover 205 comprising vacuum reaction chamber 103, be arranged on the ferrosilicon bag 102 of vacuum reaction chamber 103 inside and be arranged on vacuum reaction chamber 103 top, heating unit mount pad 207 is arranged at described vacuum chamber upper cover 205 top, vacuum chamber upper cover 205 is equipped with temperature measuring equipment 208, heating unit mount pad 207 is connected with ferrosilicon liquid heating unit 206;
At least a set of airtight magnesium slag injection conveyor, comprise the magnesium slag winding-up rifle 204 that ferrosilicon bag 102 is stretched in one end, magnesium slag winding-up rifle 204 is provided with blowing valve 203, and magnesium slag winding-up rifle 204 is positioned at blowing valve 203 downstream, is connected with batch can 201 by charging valve 202;
A set of argon gas winding-up agitating unit, comprises and penetrates vacuum reaction chamber 103 and Argon agitating unit 105 bottom UNICOM's ferrosilicon bag 102 and be arranged in the Argon valve 106 of Argon agitating unit 105;
A set of magnesium liquid is collected and storing unit, comprises the magnesium vapor condensation trap 302 connecting vacuum reaction chamber 103 and the magnesium collection 305 being connected to magnesium vapor condensation trap 302;
And a set of vacuum suction device 501 being connected to magnesium vapor condensation trap 302 air outlet.
Directly can discharge into air to make the tail gas of discharging or realize cycling and reutilization, as prioritization scheme, between magnesium vapor condensation trap 302 and vacuum suction device 501, a set of cooling and dedusting device 402 is installed, now magnesium vapor condensation trap 302 air outlet connects cooling and dedusting device 402, and vacuum suction device 501 is connected to cooling and dedusting device 402 top by joint flange 404.
Be connected with lifting device 108 in vacuum reaction chamber 103 bottom, lifting device 108 is arranged on translating device 109; Or be connected with lifting device 108 and translating device 109 at vacuum chamber upper cover 205.These two kinds of mounting means can realize translation and the lifting of vacuum reaction chamber 103 or vacuum chamber upper cover 205, and in existing equipment, this translation, lifting device can be the equipment such as electric arc furnace, have applied very ripe, have not illustrated at this.
Ferrosilicon liquid heating unit 206 is the electrical resistor heating element that the AC and DC electric arc heating unit or the induction heating unit be made up of parts such as ruhmkorff coil, yoke, water-cooled cable, water-cooled shield rings or the heating plasma unit be made up of parts such as water cooling plasma gun, the pulse power, erection supports that regulate the parts such as electrode, vacuum water-cooled dynamic seal mechanism, electrode mount pad, splashproof shielding case of hoisting appliance to form by band or heating resistor form.The application of these type of heating in modern comfort is very extensively ripe, does not illustrate at this.
Vacuum reaction device also comprises the dreg-containing disk 107 being positioned at vacuum reaction chamber 103 inner bottom surface, and described ferrosilicon bag 102 side wall upper part has excessive cinder notch 110.
Magnesium slag injection conveyor has at least a set of vacuum batch can 201 and charging valve 202 to be installed in parallel, jet different powders and interpolation ferrosilicon, and the outlet of described breeze winding-up rifle 204 is inserted in the ferrosilicon liquid 101 of ferrosilicon bag 102 li.
Magnesium vapor condensation trap 302 is single " U " shape pipe or multiple " U " shape pipe series and parallel unitized construction, shell material is that Gr25Ni20 steel plate rolls and is welded, be communicated with vacuum chamber upper cover 205, magnesium collection 305 and cooling and dedusting device 402 by joint flange 301,303,401, magnesium collection 305 bottom surface has liquid outlet 304, by accurate temperature control 660 ~ 700 DEG C, the magnesium vapor condenses that reduction reaction in ferrosilicon bag 102 is evaporated becomes magnesium liquid to flow in magnesium collection 305.
Vacuum suction device 501 is Roots/rotary pump with liquid ring group, mechanical pump/oily topping-up pump group, multistage steam-jet pump group or Direct airexhaust Roots pump group.
Trap filter magnesium cylinder 405 is housed in the pipeline after magnesium liquid condensing trap 302, before cooling and dedusting device 402, magnesium in tail gas can be collected, dust discharge valve 403 is equipped with in described cooling and dedusting device 402 lower end, and upper end is connected with described vacuum suction device 501 by joint flange 404.
For reaching best dust removing effects, cooling and dedusting device adopts unique wet dust removal principle design, ensures the environmental requirement of discharge, working fluid (mechanical pump oil) closed cycle in system, dust after trapping is regularly discharged by dust discharge valve, technological process dust zero discharge.
Described vacuum reaction chamber 103, shell is formed by Plate Welding, and steel plate material is 20g or 16MnR steel, and shell steel plate thickness is at least 16mm; The liner of described vacuum reaction chamber 103 is magnesia fireproof insulating brick 104; Have Heat preservation element in vacuum chamber upper cover 205, the liner of vacuum chamber upper cover 205 is alumina firebricks 209; Vacuum chamber upper cover 205 is except end socket is identical with vacuum reaction chamber 103 enclosure material, and its hot operation district, top steel plate material is Gr25Ni20.
The ferrosilicon bag 102 filling siliceous 35% ~ 75% ferrosilicon liquid 101 is positioned in vacuum reaction chamber 103 by the present invention, then supporting lifting device 108 is utilized, vacuum reaction chamber 103 and vacuum room cover 205 are sealed completely, re-use vacuum system to vacuumize vacuum chamber 103, be evacuated to 67pa, then backfill argon gas and make pressure in vacuum chamber 103 be stabilized in 5.0 ~ 20.0Kpa.Then in ferrosilicon bag 102, add a certain amount of 75# ferro-silicon, by processing requirement, ferrosilicon liquid 101 intensification is heated to 1400 ~ 1600 DEG C by ferrosilicon heating unit 206, and continues insulation.Finally by be preheated to 800 ~ 1100 DEG C containing MgO40%, CaO56%, Al
2o
3the magnesium slag of 4%, by magnesium slag winding-up rifle 204, sprays in ferrosilicon liquid 101 with the speed set.There is redox reaction in ferrosilicon liquid 101 and magnesium slag, generate magnesium steam under vacuum, hot conditions.Magnesium steam enters into along air flow line the condense trap 302 that temperature remains on 660 ~ 700 DEG C, enters magnesium collection 305 after condensation, then is undertaken watering ingot or refining by magnesium collection 305 discharge.The slag produced in reaction process is except covering weld pool surface certain thickness, and all the other flow into dreg-containing disk 107 by the cinder notch 110 that overflows, and dreg-containing disk 107 entirety hung out, and recycle slag after reaction terminates.Residual exhaust after cooling and dedusting device 402 again by vacuum suction unit emptying (or enter argon gas collect cabinet recycle).When in ferrosilicon liquid 101 siliceous be less than 35% time, reaction terminate.Reaction terminates rear residue alloy solution be cast into ferroalloy productor after adjusting component, and another part adds the alloy solution that industrial silicon or 75# ferrosilicon are adjusted to siliceous 35% ~ 75%, carries out the smelting of next heat.
In embodiment of the present invention, furnace charge preparatory process mainly comprises (for 5t ferrosilicon solvent):
The first step: ready reaction thing, by calcined dolomite, lime, aluminium sesquioxide etc., according to mass ratio MgO:CaO:Al
2o
3the ratio of=40:56:4 mixes, and adopts ore mill grinding, ensures that granularity is 0.02 ~ 0.5mm.Then be preheated to 1000 DEG C by pre-heating system, load the batch can 201 that dusts and keep in stand-by.By 75# ferrosilicon particle, load in alloy feed bin after preheating;
Second step: prepare solvent, in smelting furnace, the ferro-silicon of the 5t siliceous 55% be mixed into by 3.35t45 ferrosilicon and 1.65t75 ferrosilicon melted and is warming up to 1300 DEG C, then pouring in ferrosilicon bag.
Equipment in the present embodiment runs and mainly comprises with technical process:
1): the ferrosilicon bag 102 that ferrosilicon solution is housed is loaded in vacuum reaction chamber 103, run vacuum reaction chamber translation and lifting device 108, vacuum reaction chamber and vacuum chamber upper cover 205 are sealed completely.
2): after system is evacuated to 67Pa by startup vacuum suction unit, in system, backfills argon gas, make system pressure remain on 5.0 ~ 20.0Kpa.
3): 75 ferrosilicon then adding 780Kg in ferrosilicon bag 102, starting heating unit 206 makes ferrosilicon liquid temp remain on 1350 ~ 1600 DEG C (associating with working vacuum degree), rifle 204 of being jetted by magnesium slag inserts in the ferrosilicon liquid of 200 ~ 300mm bottom ferrosilicon bag, and open blowing valve 203 and charging valve 202 by magnesium slag winding-up rifle 204 with certain speed winding-up 5000Kg in ferrosilicon liquid containing magnesium powder.Argon bottom-blowing flow is regulated again according to reality situation of smelting.Now magnesium slag fully mixes in ferrosilicon bag with ferrosilicon liquid, concurrent raw reduction reaction.First the magnesium steam produced enter temperature control in the magnesium vapor condensation trap 302 of 660 ~ 700 DEG C along vacuum pneumatic direction, condenses into magnesium liquid and flow in magnesium collection 305.Other gas enters cooling and dedusting device 402, carries out pressure cooling and dedusting (or tail gas is entered recycling after treatment in argon gas collection cabinet by vacuum system).Flow into dreg-containing disk 107 from excessive cinder notch after the slag accumulation produced is a certain amount of.
4): repeat the 3rd step and operate 6 times, this smelting cycle terminates.
5): after question response terminates, promote and close spray gun 204, close vacuum pump set, carry out argon gas backfill.Adjustment BOTTOM ARGON BLOWING flow, makes residue in alloy solution float discharge as far as possible.After pressure and atmospheric equilibrium, start lifting and the translating device of vacuum reaction chamber 103, make it be separated with vacuum chamber upper cover 205.Hang out ferrosilicon bag 102, part ferrosilicon liquid 101 is for pouring into a mould ferro-silicon, and part stays for dissolving reaction alloy solution.After dreg-containing disk is called away, slag treatment is utilized.Magnesium liquid is discharged from liquid outlet 304, for ingot casting or refining.
6): the production smelting cycle entering next heat after equipment of reviewing and validate is normal.
In the present embodiment, magnesium liquid 6000Kg can be obtained; Consumption calcined dolomite and auxiliary material are about 30000Kg, and consume 75# ferrosilicon 6330Kg, consume 45 ferrosilicon 3350Kg, byproduct is the ferro-silicon solution 6110kg of siliceous 44.7%, produces slag 25735kg.Through estimation, the element silicon consumption of the ton magnesium of this process for smelting magnesium is 587.3kg, and amounting to 75# ferrosilicon is 783Kg/ ton.The ton magnesium 75# ferrosilicon consumption of tradition Pidgeon process is 1200kg.Compare, this processing method substantially increases the reduction efficiency of Silicon in Ferrosilicon element.
The present invention constructs a ferrosilicon solution medium by ferrosilicon bag 102, solid by very slow for reaction solid-contact reacts reasonably transfers in liquid solution, formation solid-liquid, even liquid-liquid reactions, improve reaction efficiency greatly.
Chemical reaction heat is made full use of, as SiO in the present invention
2with the slagging heat of CaO, Siliciumatom dissolves in the solution heat etc. in iron liquid, can effectively reduce energy consumption.
The present invention can according to the convenient and reasonable adjustment industrial scale of size in reaction molten bath, and equipment is simple, easy to operate, easily realizes mechanize, automatization, intelligently to produce.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
The device that the present embodiment does not describe in detail and structure belong to the well known device of the industry and common structure or conventional means, do not describe one by one here.
Claims (12)
1. a vacuum magnesium smelting device, is characterized in that: comprise
A vacuum reaction device, it vacuum chamber upper cover (205) comprising vacuum reaction chamber (103), be arranged on the inner ferrosilicon bag (102) of vacuum reaction chamber (103) and be arranged on vacuum reaction chamber (103) top, heating unit mount pad (207) is arranged at described vacuum chamber upper cover (205) top, vacuum chamber upper cover (205) is equipped with temperature measuring equipment (208), heating unit mount pad (207) is connected with ferrosilicon liquid heating unit (206);
At least a set of airtight magnesium slag injection conveyor, comprise magnesium slag winding-up rifle (204) that ferrosilicon bag (102) is stretched in one end, magnesium slag winding-up rifle (204) is provided with blowing valve (203), magnesium slag winding-up rifle (204) is positioned at blowing valve (203) downstream, is connected with batch can (201) by charging valve (202);
A set of argon gas winding-up agitating unit, comprises and penetrates vacuum reaction chamber (103) and the Argon agitating unit (105) of UNICOM's ferrosilicon bag (102) bottom and be arranged in the Argon valve (106) of Argon agitating unit (105);
A set of magnesium liquid is collected and storing unit, comprises the magnesium vapor condensation trap (302) connecting vacuum reaction chamber (103) and the magnesium collection (305) being connected to magnesium vapor condensation trap (302);
And a set of vacuum suction device (501) being connected to magnesium vapor condensation trap (302) air outlet.
2. vacuum magnesium smelting device as claimed in claim 1, it is characterized in that: described vacuum magnesium smelting device also comprises a set of cooling and dedusting device (402), described cooling and dedusting device (402) is arranged between magnesium vapor condensation trap (302) and vacuum suction device (501).
3. vacuum magnesium smelting device as claimed in claim 1, is characterized in that: described vacuum reaction chamber (103) bottom is connected with lifting device (108), and lifting device (108) is arranged on translating device (109).
4. vacuum magnesium smelting device as claimed in claim 1, is characterized in that: described ferrosilicon liquid heating unit (206) is AC and DC electric arc heating unit, induction heating unit, heating plasma unit or electrical resistor heating element.
5. vacuum magnesium smelting device as claimed in claim 1, it is characterized in that: described vacuum reaction device also comprises the dreg-containing disk (107) being positioned at vacuum reaction chamber (103) inner bottom surface, described ferrosilicon bag (102) side wall upper part has excessive cinder notch (110).
6. vacuum magnesium smelting device according to claim 1, it is characterized in that: described magnesium vapor condensation trap (302) is single " U " shape pipe or multiple " U " shape pipe series and parallel unitized construction, shell material is that Gr25Ni20 steel plate rolls and is welded, be communicated with vacuum chamber upper cover (205), magnesium collection (305) and cooling and dedusting device (402) by joint flange (301,303,401), magnesium collection (305) bottom surface has liquid outlet (304).
7. vacuum magnesium smelting device according to claim 1, is characterized in that: described vacuum suction device (501) is Roots/rotary pump with liquid ring group, mechanical pump/oily topping-up pump group, multistage steam-jet pump group or Direct airexhaust Roots pump group.
8. vacuum magnesium smelting device according to claim 2, it is characterized in that: after magnesium vapor condensation trap (302), in the front pipeline of cooling and dedusting device (402), trap filter magnesium cylinder (405) is housed, dust discharge valve (403) is equipped with in described cooling and dedusting device (402) lower end, and upper end is connected with described vacuum suction device (501) by joint flange (404).
9. vacuum magnesium smelting device as claimed in claim 1, it is characterized in that: described vacuum reaction chamber (103), shell is formed by Plate Welding, and steel plate material is 20g or 16MnR steel, and shell steel plate thickness is at least 16mm; The liner of described vacuum reaction chamber (103) is magnesia fireproof insulating brick (104); Vacuum chamber upper cover has Heat preservation element in (205), and the liner of vacuum chamber upper cover (205) is alumina firebrick (209); Vacuum chamber upper cover (205) is except end socket is identical with vacuum reaction chamber (103) enclosure material, and its hot operation district, top steel plate material is Gr25Ni20.
10. application rights requires a magnesium refining method for the vacuum magnesium smelting device described in 3, it is characterized in that: comprise the following steps,
1): load in vacuum reaction chamber (103) by the ferrosilicon bag (102) that ferrosilicon solution is housed, run translating device (109) and lifting device (108), vacuum reaction chamber (103) and vacuum chamber upper cover (205) are sealed completely;
2): after vacuum magnesium smelting device internal gas pressure is evacuated to 67Pa by startup vacuum suction device (501), in vacuum magnesium smelting device, backfill argon gas;
3): in ferrosilicon bag (102), add 75# ferrosilicon, starting heating unit (206) makes ferrosilicon liquid temp remain on 1350 ~ 1600 DEG C, rifle (204) of being jetted by magnesium slag inserts in the ferrosilicon liquid of 200 ~ 500mm bottom ferrosilicon bag, and open blowing valve (203) and charging valve (202) jets rifle (204) to blowing magnesium breeze in ferrosilicon liquid by magnesium slag, again by Argon agitating unit (105) argon bottom-blowing, magnesium slag is fully mixed in ferrosilicon bag (102), concurrent raw reduction reaction with ferrosilicon liquid; First the magnesium steam produced enter temperature control in the magnesium vapor condensation trap (302) of 660 ~ 700 DEG C along air flow line, condenses into magnesium liquid and flow in magnesium collection (305).
11. magnesium refining methods as claimed in claim 10, is characterized in that: further comprising the steps of,
4): after question response terminates, promote and close magnesium slag winding-up rifle (204), close vacuum pump set, carry out argon gas backfill, adjustment BOTTOM ARGON BLOWING flow, residue in alloy solution is floated discharge as far as possible, after pressure and atmospheric equilibrium, start lifting device (108) and translating device (109), vacuum reaction chamber (103) is separated with vacuum chamber upper cover (205).
12. magnesium refining methods as claimed in claim 10, is characterized in that: also comprise preorder preparatory process:
The first step: ready reaction thing, calcined dolomite, lime, light-burned bauxite are mixed, and adopt ore mill grinding, ensure that granularity is 0.02 ~ 0.5mm, then 800 ~ 1000 DEG C are preheated to by pre-heating system, load the batch can (201) that dusts temporary stand-by, by 75# ferrosilicon particle, load in alloy feed bin after preheating;
Second step: prepare solvent, in smelting furnace, the ferro-silicon of be mixed into by 45# ferrosilicon and 75# ferrosilicon siliceous 35% ~ 75% melted and be warming up to 1300 ~ 1450 DEG C, then pouring in ferrosilicon bag.
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| CN104087752B (en) * | 2014-07-28 | 2017-02-15 | 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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| 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 |
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| CN112609091A (en) * | 2020-12-28 | 2021-04-06 | 金先奎 | Method for smelting magnesium metal by carbothermic reduction |
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