CN101914692B - Single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device and method - Google Patents
Single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device and method Download PDFInfo
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Abstract
The invention discloses single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device and method. The device comprises an induction furnace (101), a vacuum reaction chamber (104), a single dip pipe (102) and an argon blowing pipe (110) with a side wall communicated with guided flows; and besides, the device also comprises a magnesium steam condenser (206), a magnesium liquid spray thrower (210), a magnesium liquid storer (202) and magnesium mining powder conveying and spraying devices (111)-(115), wherein the magnesium steam condenser (206), the magnesium liquid spray thrower (210) and the magnesium liquid storer (202) are communicated. The method comprises the following steps of: preparing silicon iron liquid with the silicon content of 30%-65% and the temperature of 1,350-1,600 DEG C, making the mixtures of the silicon iron liquid and magnesium mining powder blown into the silicon iron liquid annularly flow between a vacuum reaction device and the induction furnace at the vacuum degree of 350 Pa-10,000 Pa for reaction to generate magnesium steam, carrying out condensation and magnesium liquid spraying to the magnesium steam to generate magnesium liquid, making the magnesium liquid flow into a storing device, and then pouring magnesium ingots. The device has the advantages of energy saving, low consumption, high productivity and the like.
Description
Technical field
The present invention relates to refine the devices and methods therefor of magnesium, relate in particular to the devices and methods therefor of single-dip pipe silicon iron bath vacuum circulated magnesium-smelting.
Background technology
Magnesium and magnesiumalloy have light weight, and specific tenacity is high, good heat conductivity; Be easy to reclaim; Advantages such as environmental pollution is little have important use and are worth in fields such as vehicles manufacturing, mechano-electronic, aerospace, defence and military such as automobiles, be described as " green material of 21 century ".
The suitability for industrialized production of MAGNESIUM METAL 99 generally has two kinds of technologies: one type is electrolytic process; Another kind of is vacuum-thermal method, and it is reductive agent that this method generally adopts ferrosilicon, and what generally adopt is horizontal jar outer heating period of reducing process, claims Pidgeon process again.
Electrolytic method magnesium smelting is attended by the environmental issue that can't overcome, so made way for Pidgeon process in recent years gradually owing to produce chlorine.
The former magnesium output of China has accounted for the share in the whole world about 80%, almost all adopts Pidgeon process production.
So-called Pidgeon process, be by the famous metallurgist L.M.Pidgeon of Canada at perfect magnesium refining method of nineteen forty-two, and, use and do not have the improvement of essence till today with his technology of naming.This technology be with siliceous 75% ferrosilicon with contain Natural manganese dioxide and forge white powder and be mixed into the solid phase way of contact; Place in horizontal jar that high temperature steel processes, jar outer flame heating that adopts promotes that a material carries out chemical reaction in horizontal jar; The material reaction temperature is about 1150～1250 ℃, and vacuum tightness is generally less than 20Pa in jar.Existing production of magnesium by pidgeonprocess has following shortcoming:
1. the reactant ferrosilicon whitely carries out chemical reaction with the solid phase way of contact with forging, and speed of reaction is slow, and the reduction reaction cycle reaches 10～12 hours, inefficiency in the typical technological process;
2. adopt the flame indirect heating, outside the cycle is long by being transmitted to inside gradually by reactor drum for heat, and heat-energy losses is big, and the heat energy utilization rate is low, and specialty analysis thinks that the heat energy utilization rate of typical process has only about 20%;
3. because the mode of indirect heating has limited reactor volume, typical horizontal jar internal diameter is in 400 millimeters, and batch is little; Single jar of former magnesium of output has only 20～30 kilograms; Floor space is big, and the field management difficulty is big, is difficult for realizing scale operation and mechanized;
4. adopt that to contain element silicon 75% ferrosilicon be reductive agent, the consumption of general ton magnesium ferrosilicon is 1.05～1.20 tons, and promptly element silicon is than the excessive waste 36～56% of theory demands, and all ferro elements have all been wasted simultaneously;
5. the magnesium vapor that restores directly is condensed into solid state crystallization magnesium under condition of high vacuum degree, do not have mobile convenient, collects to discharge difficulty.
6. the horizontal jar of general high temperature steel that adopts the costliness that contains nickel, chromium, consumes very fast, the cost height;
7. smoke contamination is serious, and work situation is abominable, and is big to ecotope negative impact on every side;
8. need hand charging, skim, clear up crystallization magnesium, labour intensity is big.
Authorized and disclosed a collection of invention and utility model patent technology; Above-mentioned deficiency to production of magnesium by pidgeonprocess technology has proposed improved method; Mainly be to become the electric energy heating of flame heating into clean energy; Concrete thermal source has resistor disc heating, charging resistance heating, induction heating etc., and another improvement is exactly to become indirect heating to be inner heating.
Because foregoing invention and utility model patent do not relate to the solid form of reactant ferrosilicon, so do not make the reduction reaction efficient of magnesium that lifting is in essence arranged.
For this reason; Someone has proposed the technology of interior heat refining magnesium; As Chinese patent 95100495.6 " electric furnace hot charge siliconthermic reduction vacuum magnesium-smelting new process " disclose a kind of in the technology of heat refining magnesium, wherein through electric furnace that burnt rhombspar, aluminium vanadine and siliceous ferrosilicon more than 75% are packed into, under the vacuum condition of 0.01Pa; By the slag resistance heating, silicon reduction Natural manganese dioxide refining magnesium.Yet this technology that possibly relate to liquid reaction also is that along with the rising of temperature, furnace charge can be molten state behind the solid-state furnace charge of packing into, and the reaction starting stage remains the solid phase way of contact.But the reactive system that this patent is described can cause magnesium vapor directly to be condensed into solid state crystallization magnesium because condition of high vacuum degree can't reclaim magnesium vapor with the liquid magnesium form, stops up vacuum system.In addition, this technology can't realize continuous production.
Patent ZL200710035929.8 " continuous magnesium smelting device of a kind of induction heating and process for smelting magnesium thereof ", its device comprises continuous-feeding device, vacuum suction device system, induction heating chamber, magnesium vapor condensing works and slag discharging device.With calcined dolomite, 75% ferrosilicon, fluorite; According to 80: 17: 3 batch mixes abrasive dusts of weight ratio, be pressed into pelletizing, the vacuum tightness of packing into is 1～10Pa storage bin; The induction heating chamber of sending into vacuum tightness 1～10Pa through 300～500 ℃ of pelletizings of preheating is through 5h heat fused refining magnesium; 660～700 ℃ of magnesium vapor condensing chamber temperature, gaseous tension are under 0.01～0.1MPa condition, process magnesium liquid, magnesium ingot, continuous discharging slag; Then repeat above-mentioned technological process, refine magnesium production continuously.This method is liquid refining magnesium method, and its shortcoming is the solid thermal charging, cause the induction heating fusing time long, the production cycle is long, energy consumption is high.The vacuum tightness difference of vacuum heating chamber and magnesium vapor condensing chamber is bigger, causes the vacuum system operation frequent, and is difficult to accurate control, and be prone to the production fault of furnace charge and slag bridge formation.
Summary of the invention
The present invention is directed to the drawback of prior art, the devices and methods therefor of single-dip pipe silicon iron bath vacuum circulated magnesium-smelting is provided.
The reductive agent ferrosilicon is a fused solution, and hot charging is gone into induction furnace continued heat temperature raising, and vacuum reaction chamber is provided with the single-dip pipe that immerses ferrosilicon liquid in the induction furnace; Under vacuum suction and the water conservancy diversion argon gas expanded by heating that is blown into drove, ferrosilicon liquid formed the successive annularly flow between vacuum reaction chamber, single-dip pipe and induction furnace, adopted the magnesium slag blowing device that magnesium slag is sprayed and got in the ferrosilicon liquid; Make magnesium slag be soaked within the ferrosilicon bath; Magnesium is reduced the generation magnesium vapor under the high-temperature vacuum condition, and reaction interface is long-pending big, and has realized the acceleration renewal of reaction interface; Recovery time shortens greatly, and reduction efficiency greatly improves.Adopt the method for magnesium liquid circulated sprinkling to collect magnesium vapor, realize the liquid stateization of product.Through constantly replenishing element silicon, realize continuous production.The single-dip pipe structure has stronger flexibility for the induction furnace of different size, and the refractory consumption rate of soaking tub is low simultaneously, is convenient to maintenance and repair.This device and method is produced the former magnesium of metal, has overcome the shortcoming of prior art, have energy-conservation, reduce advantages such as raw materials consumption, production efficiency is high, cost is low, work situation good, easily be automated.
Single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device of the present invention; Comprise: the vacuum reaction device; The single-dip pipe 102 that it comprises vacuum reaction chamber 104, be arranged on the tongued and grooved flanges disk cover 119 at vacuum reaction chamber 104 tops, vacuum reaction chamber 104 bottoms connect is on the top of vacuum reaction chamber 104 and the electric arc or the plasma boiler of sidewall setting and be attached to horizontally rotating and hoisting appliance on the vacuum reaction device; Heating unit, it is arranged on the below of vacuum reaction device, and be one can fascinate, liftable power frequency or medium-frequency induction furnace 101; Magnesium slag is carried sparging unit; It magnesium slag storing unit 111,112,113 that comprises a plurality of connections is carried spray tube 115 with 114 with the magnesium slag that an end is connected with the magnesium slag storing unit of a plurality of connections; Wherein, magnesium slag carry the other end of spray tube 115 to stretch to saidly to fascinate, in liftable power frequency or the medium-frequency induction furnace 101; At least one magnesium liquid is collected and storing unit; It is arranged on the upper outside face of vacuum reaction chamber 104, it comprises the magnesium vapor condensing surface 206 that is communicated with vacuum reaction chamber 104, be arranged on condensing surface valve 212 on the magnesium vapor condensing surface 206, be arranged on magnesium vapor condensing surface 206 tops magnesium liquid spray thrower 210, be arranged on the magnesium liquid holder 202 and vacuum that is connected vacuum suction device and cleaning apparatus successively and cleaning apparatus pipe connecting 208 of magnesium vapor condensing surface 206 bottoms.
Preferably, magnesium smelting device of the present invention, said vacuum suction device are lobe pump and water-ring pump group, sliding vane rotary pump and oily topping-up pump group, or steam ejector pump system group.
Preferably; Magnesium smelting device according to the invention; Vacuum reaction chamber 104 shells are box hat; Its liner for asbestos plate, paraffin stone or aluminium sesquioxide hollow ball be the thermofin of material and siliceous with high alumina matter, corundum, carbonaceous or carbonization be the flame retardant coating of material, and said flame retardant coating is positioned at the outside of said thermofin; Vacuum reaction chamber 104 volumes are 1.1～4.0 times of induction furnace 101 capacity, and the depth-width ratio of vacuum reaction chamber 104 is 2.5～8.0.
Preferably; Magnesium smelting device according to the invention; The single-dip pipe 102 that vacuum reaction chamber 104 bottoms connect is the branch body component of said vacuum reaction device, and the single-dip pipe wall is set up the argon gas winding-up pipe 110 of water conservancy diversion, and single-dip pipe 102 liners are high alumina matter, carbonaceous, silicon carbide refractory material stamp mass; It highly is 0.6～2.0 meter, and its internal diameter is 0.30～0.80 with vacuum reaction chamber 104 internal diameters ratio.
Preferably; Magnesium smelting device according to the invention; Magnesium liquid is collected and storing unit also comprises the magnesium liquid holder valve 205 that is arranged on the magnesium liquid holder 202, is arranged on vacuum connection tube valve 209 and magnesium liquid lifting gear on vacuum and the dedusting pipe connecting 208; Wherein said magnesium liquid lifting gear comprises: an end and magnesium steam condenser 206 is communicated with, and the magnesium liquid riser tube 204 of the other end and 202 connections of magnesium liquid storer, is arranged on the magnesium liquid riser tube valve 203 on the magnesium liquid riser tube 204 and is arranged on the quantitative lift pump 207 of magnesium liquid on the magnesium liquid riser tube 204.
Preferably; Magnesium smelting device according to the invention, a plurality of magnesium slags conveying spray tubes 115 can be separately positioned on the tip position of vacuum reaction chamber 104, or the sidewall of the position, middle and upper part of vacuum reaction chamber 104; Or single-dip pipe 102 ingress; Or the top of induction furnace 101, or inserting ferrosilicon liquid molten bath, the above-mentioned different sites of selection also capable of being combined is carried spray tube 115 to place said a plurality of magnesium slag.
Preferably; Magnesium smelting device according to the invention; The internal diameter of induction furnace 101 is 1.2～3.0 with the vacuum reaction chamber 104 internal diameters ratio of vacuum reaction device, and induction furnace 101 comprises woven fiber glass, asbestos plate and the aluminium sesquioxide hollow ball of porous steel casing, ruhmkorff coil 105, liner, the prefabricated magnesia crucible of liner and the prefabricated graphite or the silicon carbide crucible of interior cover; Induction furnace 101 fire doors are provided with slag trough 117, and induction furnace 101 bottoms are provided with the bottom blowing air permeation device 103 that is communicated with argon gas winding-up pipe 120, and induction furnace 101 is set up induction furnace body of heater tilting mechanism 107 and body of heater hoisting appliance 108.
Preferably, vacuum reaction device according to the invention is set up preheating and heating unit, can be flame combustion apparatus or the electric arc or the plasma heating device of coal gas, Sweet natural gas.
The invention still further relates to a kind of vacuum process for smelting magnesium method based on said magnesium smelting device, this method comprises the steps:
(1) prepares the refining magnesium raw material: contain MgO 20～85%, CaO 0～60%, Al
2O
30～40%, surplus is the magnesium slag of impurity; Prepare reductive agent: siliceous 30～65% ferrosilicon, siliceous 74～82% ferrosilicon or siliceous 97% industrial silicon, and the mass ratio of silicon is 2.5～15 in magnesium slag and the ferrosilicon;
(2) with gas flame, Flame of Natural Gas, electric arc or plasma arc with vacuum reaction chamber 104 and single-dip pipe 102 pre-heating temperature elevations to 1000～1500 ℃; Simultaneously; Seal closure is installed in single-dip pipe 102 ports, and the vacuum tightness of forvacuum reaction unit reaches 350～10000Pa; The argon gas winding-up pipe 120 that again induction furnace 101 bottom blowing air permeation device 103 is communicated with is opened Argon; 1350 ℃～1600 ℃ ferrosilicon liquid heat are blended in the induction furnace 101; Ruhmkorff coil 105 energising heating; Start and horizontally rotate with hoisting appliance and with 200～1000mm under the single-dip pipe 102 insertion ferrosilicon liquid levels of vacuum reaction device; Or hoisting appliance lifting induction furnace 101 height that induction furnace 101 is set up are opened the argon gas stream of argon gas winding-up pipe 110 to single-dip pipe 102 sidewalls introducing water conservancy diversion simultaneously so that single-dip pipe 102 is inserted in the ferrosilicon liquid;
(3) after the seal closure fusing of single-dip pipe 102 ports; Pyritous ferrosilicon liquid sprays in the vacuum reaction chamber 104 through single-dip pipe 102 continuously; In opposite side continuous backflow to the induction furnace 101 of part ferrosilicon liquid via single-dip pipe 102; Thereby the ferrosilicon liquid in the induction furnace 101 rises to vacuum reaction chamber 104 again in single-dip pipe 102 opposite sides are back to the ferrosilicon molten bath of induction furnace 101 through single-dip pipe 102 1 sides, opens the ferrosilicon liquid of electric arc or plasma electrically arc power heating ring stream simultaneously;
The magnesium slag that (4) will be preheated to 800～1100 ℃ carries spray tube 115 to spray into 10～80kg/min speed in 1350～1600 ℃ the circulation of ferrosilicon liquid through magnesium slag; The magnesium vapor stream that generates upwards flows along the vacuum reaction device; Flowing into temperature through condensing surface valve 212 is in 650～700 ℃ the condensing surface 206; Start the quantitative lift pump 207 of magnesium liquid simultaneously, make magnesium liquid spray thrower 210 spray magnesium liquid form magnesium liquid, flow in the magnesium liquid holder 202 to catch and to absorb magnesium vapor; Regularly discharge, cast magnesium ingot; Residual gas in vacuum reaction device and the magnesium condensing surface will get into cleaning apparatus through vacuum and cleaning apparatus pipe connecting 208 through vacuum connection tube valve 209, discharged by vacuum-pumping system at last.
Preferably, magnesium refining method according to the invention along with the consumption of silicon in the ferrosilicon liquid, is blended into the ferrosilicon liquid that silicon content is higher than silicon content in the induction furnace, perhaps adds solid ferrosilicon, industrial silicon, with the silicon content of keeping ferrosilicon liquid in the induction furnace within 30～65% scopes.
Preferably, magnesium refining method according to the invention, said magnesium refining method is further comprising the steps of:
(1) regularly gets rid of slag liquid;
(2) regularly in induction furnace 101 melts, be blended into siliceous 75% fusion ferrosilicon liquid, or utilize magnesium slag to carry industrial silicon that spray tube sprays into siliceous 30～65% ferrosilicon, siliceous 74～82% ferrosilicon or siliceous 97% to replenish ferrosilicon liquid silicon content;
(3) before the periodicity production blowing out; Close vacuum connection tube valve 209, condensing surface valve 212 and magnesium liquid holder valve 205; Continuation feeds argon gas when the pressure of vacuum reaction device reaches 0.1MPa through the tunger tube of water conservancy diversion; Begin to reduce the induction furnace position or promote vacuum reaction device height,, rotate to the preparation station so that single-dip pipe 102 is broken away from ferrosilicon liquid level and induction fire door;
(4) before the periodicity blowing out, adding ferrosilicon, industrial silicon, technically pure iron, commercial-purity aluminium are adjusted residual ferrosilicon liquid composition, cast siliceous at least iron alloy, as refining magnesium sub product
The present invention at first opens the argon gas winding-up pipe 119 winding-up argon gas that induction furnace bottom air permeation device 103 is communicated with; Be that 1350～1600 ℃ of ferrosilicon liquid of siliceous 55% that prepare are blended in the induction burner hearth with temperature then; Adopt lobe pump and the forvacuum of water-ring pump vacuum-pumping system again; With the forvacuum degree is that the vacuum reaction device of 600～5000Pa drops to 200～1000mm under the ferrosilicon liquid level that the single-dip pipe mouth immerses induction furnace, opens the argon gas valve and introduces the argon gas stream of water conservancy diversion to single-dip pipe 102 sidewalls, after the seal closure fusing of single-dip pipe mouth; Form self-induction stove ferrosilicon liquid returns induction furnace ferrosilicon liquid to the vacuum reaction device circulation; Simultaneously, using the unit power input is that the induction furnace of 800～2000kw/t continues heating ferrosilicon liquid, is preheated to 900～1100 ℃ and contains MgO 80%, CaO 10%, Al what get ready
2O
310% magnesium slag is carried spray tube from vacuum reaction device top through magnesium slag; Speed with 30～70kg/min is injected into magnesium slag in the indoor circulation ferrosilicon liquid of vacuum reaction, and the reduction reaction of magnesium slag and high temperature ferrosilicon liquid generation magnesium under the vacuum condition generates magnesium vapor; When excess temperature remains in 650 ℃ the magnesium vapor condensing surface; Under magnesium liquid spray, the magnesium vapor cohesion pours into magnesium ingot again for liquid magnesium; Regularly discharge residue; When ferrosilicon liquid siliceous less than 30% the time; In induction furnace, add siliceous 75% ferrosilicon or industrial silicon adjustment silicon liquid composition greater than 30%, continue refining magnesium, periodically stop production; Adding ferrosilicon, industrial silicon, technically pure iron, commercial-purity aluminium are adjusted residual ferrosilicon liquid composition; Discharge residual siliceous iron alloy liquid, ingot casting is siliceous iron alloy, is refining magnesium sub product.Maintenance and replacing parts drop into the new production cycle.
Vacuum reaction device working procedure of the present invention and technical process are: the top seal ring flange 119 of sealed vacuum reaction unit at first; Joint flange 118 through soaking tub is installed single-dip pipe 102; Reach 1000～1500 ℃ with gas flame or electric arc preheating vacuum reaction device; With seal closure sealing single-dip pipe port, close magnesium liquid holder valve 205, magnesium liquid riser tube valve 203 respectively, open condensing surface valve 212, vacuum connection tube valve 209; Starting the vacuum pump group is 350～10000Pa to vacuum reaction apparatus system forvacuum degree, opens argon gas winding-up pipe 110 blowing argon gas.Opening the argon gas winding-up pipe 120 winding-up argon gas that the bottom blowing air permeation device 103 of induction furnace is communicated with, is that 1350～1600 ℃ fusing ferrosilicon liquid is blended in the induction burner hearth with temperature again.Horizontally rotate and hoisting appliance owing to set up on the vacuum reaction device; Then can the vacuum reaction device of forvacuum and preheating be rotated to induction furnace directly over; Decline vacuum reaction device is imbedded 200～1000mm under the ferrosilicon liquid level with single-dip pipe, at this moment vacuum reaction device and atmospheric isolation; Form enclosed space, under the vacuum suction effect, form vacuum environment.After the fusing of the seal closure of single-dip pipe, the ferrosilicon liquid of induction furnace rises under the vacuum take-off effect, enter in the inside lumen of single-dip pipe, and the continuation rising to enter into vacuum reaction indoor.Open the water conservancy diversion argon gas winding-up tube valve that is attached to single-dip pipe and introduce the water conservancy diversion argon gas; Perhaps strengthen the flow that the induction furnace bottom air permeation device feeds argon gas; Ferrosilicon liquid self-induction stove molten bath sprays into vacuum reaction chamber through single-dip pipe one side like ferrosilicon liquid fountain; And under the deadweight effect via single-dip pipe opposite side internal reflux in induction furnace, circulation repeatedly, ferrosilicon liquid forms the annularly flow of ferrosilicon liquid through single-dip pipe, vacuum reaction chamber in the induction furnace.Fig. 2 is the synoptic diagram of vacuum circular flow state; 303 is the flow direction of liquid ferrosilicon; Difference of altitude of fusion ferrosilicon liquid level 302 existence in fusion ferrosilicon liquid level 301 and the induction furnace 101 in the vacuum reaction chamber 104; Fusion ferrosilicon liquid level 302 is claimed free surface again in the induction furnace 101, and 301 and 302 difference of altitude can reach more than 2 meters.Open single-dip pipe mouth blowing argon gas one side-lower of magnesium slag blowing device in induction furnace ferrosilicon liquid and spray magnesium slag; Magnesium slag is bathed by the circulation ferrosilicon and is swept along wherein; When flowing through vacuum reaction chamber, under high temperature and 350～10000Pa vacuum condition, through the reduction reaction generation magnesium vapor of well-mixed ferrosilicon liquid and magnesium slag generation magnesium; Magnesium vapor upwards flows along Vakuumkammer under system's differential pressure action; It is the cooling that is cooled of 650～700 ℃ condensing chamber 206 that magnesium vapor flows into temperature through condenser valve 212, and simultaneously, the cooling of magnesium liquid spray makes magnesium vapor liquefied rapidly on magnesium drop surface; Magnesium liquid in magnesium liquid holder valve 205 flows into magnesium liquid holder 202, regularly pours into magnesium ingot again.Residual gas in vacuum reaction device and the condensing surface gets into dust-removal system through vacuum connection tube valve 209 and vacuum and cleaning apparatus pipe connecting 208, is discharged by vacuum-pumping system at last.The slag that contains silicon-dioxide that reduction reaction generates under manpower, mechanical force, air blowing effect, is regularly discharged from the slag trough of induction furnace.When fusion ferrosilicon liquid silicon content is lower than 30%～65% a certain set(ting)value; Directly be blended into 1350～1600 ℃ of siliceous ferrosilicon liquid of 30%～65% that are higher than to induction furnace; Or utilize magnesium slag to carry spray tube to spray into the industrial silicon of granularity 0.01～20mm, to keep the continuous production of refining magnesium.According to ferrosilicon liquid quality and the composition in the induction furnace, blowing out regularly.During blowing out, at first stop the magnesium slag of jetting, close quantitative lift pump 207 of magnesium liquid and magnesium liquid holder valve 205; Close the vacuum air pump group, continue to be blown into argon gas to destroy system vacuum, make vacuum system gradually applying argon gas be pressurized to atmospheric pressure state; Start hoisting appliance in succession and promote the vacuum reaction device; Make the single-dip pipe port break away from the ferrosilicon liquid level, close the water conservancy diversion argon gas winding-up tube valve of single-dip pipe, rotate the vacuum reaction device again to parking the position to responding to more than the fire door.Remaining ferrosilicon liquid is produced the alloy that contains silicon and iron through adding ferrosilicon, industrial silicon, commercial-purity aluminium etc., as refining magnesium sub product.Stop induction furnace power supply, start the tilting mechanism induction furnace that fascinates and pour out residue and remaining ferro-silicon liquid, close induction furnace bottom argon gas valve again.Then, prepare the production of next production cycle again.
The present invention and prior art contrast have certain technological innovation and breakthrough.At first, adopting fused ferrosilicon liquid is reductive agent, and makes ferrosilicon liquid begin to flow from induction furnace; Sequential flow is conducted oneself with dignity through the single-dip pipe opposite side according to it through single-dip pipe, vacuum reaction chamber again, flow back into induction furnace; Realize annularly flow; Magnesium slag is spurted in the bath of circulation ferrosilicon, when periodically passing through vacuum reaction chamber, is reduced the generation magnesium vapor.Owing to adopted the liquid-solid blended flow pattern that fully contacts mutually, reaction process is strengthened, and production efficiency greatly improves.Secondly, through continuous winding-up magnesium slag, be interrupted deslagging; Regularly discharge residual ferrosilicon liquid and ingot casting; The realization serialization is produced, and uses the lower ferro-silicon liquid of silicon content as reductive agent, and residual ferrosilicon liquid is through adding other alloy adjustment composition; It is sub product that production contains ferro-silicon, can element silicon and ferro element be made full use of.Once more, adopt magnesium liquid circulated sprinkling to capture the magnesium vapor of overflowing in the reduction back, it is quickened liquefaction, the product that obtains is convenient to the control of production process for liquid.At last, owing to adopt inner heating measures such as induction heating, electric-arc heating, plasma heating, the heat energy utilization rate is high.
Comprehensive above innovation point, the present invention has heat energy utilization rate height, fast, the utilization rate of raw materials high-technology advantage of speed of reaction, realizes the advantage of saving energy and reduce the cost, reduce cost, enhancing productivity.In addition, because equipment is easy to maximize, production process is easy to operate and control, floor space is little thereby make, and is beneficial to scale operation and mechanized, has good environmental protection and labor condition simultaneously, has reduced working strength of workers effectively.Liquid continuous production method of the present invention and Pidgeon process have relatively obviously reduced raw material consumption and energy consumption, and element silicon and ferro element that magnesium per ton consumes have reduced by 26% and 84% respectively, and ton magnesium energy consumption has reduced by 36～49%.
Description of drawings
Fig. 1 is the device structure synoptic diagram of vacuum circular flow melt magnesium-smelting silicothermic process of the present invention.
Fig. 2 is a vacuum circular flow view of the present invention.
Each component names does in the accompanying drawing
101---induction furnace
102---single-dip pipe
103---the bottom blowing air permeation device
104---vacuum reaction chamber
105---ruhmkorff coil
106---flame retardant coating
107---induction furnace body of heater tilting mechanism
108---induction furnace body of heater hoisting appliance
109---fusion ferrosilicon liquid
110---argon gas winding-up pipe
111---go up feed chamber
112---following feed chamber
113---go up the feed chamber valve
114---following feed chamber valve
115---magnesium slag is carried spray tube
116---plasma heater
117---slag trough
118---the soaking tub flange
119---Vakuumkammer top seal flange disk cover
120---argon gas winding-up pipe
201---liquid metal magnesium
202---magnesium liquid holder
203---magnesium liquid riser tube valve
204---magnesium liquid riser tube
205---magnesium liquid holder valve
206---condensing surface
207---the quantitative lift pump of magnesium liquid
208---vacuum and cleaning apparatus pipe connecting
209---the vacuum connection tube valve
210---magnesium liquid spray thrower
211---the magnesium drop
212---the condensing surface valve
213---the magnesium leakage fluid dram
301---ferrosilicon liquid level in the Vakuumkammer
302---ferrosilicon liquid level in the induction furnace
303---the ferrosilicon flow is moved direction
Embodiment
Embodiment of the present invention 1
The present invention provides the equipment of silicon iron bath vacuum circulated method for smelting magnesium by hot; As shown in Figure 1; Comprise the magnesium slag storing chamber, carry sparging unit 111,112,113,114,115; Induction furnace 101 and two magnesium vapor condensing surfaces 206 and magnesium liquid holder 202; 110 soaking tub 102 is managed in the argon gas winding-up that has rotation and the vacuum reaction device of hoisting appliance, tube wall to be communicated with water conservancy diversion, and vacuum reaction chamber 104 sidewalls are provided with graphite plasma heater 116, and vacuum suction device is ZJ5000 Lodz vacuum pump and 2XH-300 sliding vane rotary pump group.Wherein, vacuum suction device also can be lobe pump and water-ring pump group, sliding vane rotary pump and oily topping-up pump group, or other models of steam ejector pump system group.Wherein a plurality of magnesium slags carry spray tube 115 can be separately positioned on the tip position of vacuum reaction chamber 104; Or the sidewall of the position, middle and upper part of vacuum reaction chamber 104; Or single-dip pipe 102 ingress; Or the top of induction furnace 101, or inserting ferrosilicon liquid molten bath, the above-mentioned different sites of selection also capable of being combined is carried spray tube 115 to place said a plurality of magnesium slag.
Unit power 800～2000kw/t ferrosilicon liquid of induction furnace 101 of the present invention; The induction furnace body of heater comprise have insulation layer, the container of flame retardant coating 106, silit working lining and be arranged at the peripheral ruhmkorff coil 105 of this insulation layer; The top of induction furnace 101 is provided for discharging the slag trough 117 of slag and residual ferrosilicon liquid; The bottom blowing air permeation device 103 that induction furnace bottom is provided with the argon gas that is used to jet is communicated with argon gas winding-up pipe 120, and induction furnace is set up body of heater tilting mechanism 107.Bottom blowing air permeation device 103 is positioned at the vertical projection place of the winding-up of argon gas on the single-dip pipe center of circle, 102 cross section and its sidewall pipe 110 port lines 1/2nd positions in induction furnace 101 bottoms.
The vacuum reaction chamber 104 of vacuum reaction device of the present invention, its bottom is connected with single-dip pipe 102, thickness of inner lining 40～60mm, argon gas winding-up pipe 110 is located at single-dip pipe 102 lower port greater than the 350mm place.Vacuum reaction chamber 104 shells are box hat; Liner for asbestos plate, paraffin stone or aluminium sesquioxide hollow ball be the thermofin of material and siliceous with high alumina matter, corundum, carbonaceous or carbonization be the flame retardant coating of material; Vacuum reaction chamber 104 volumes are 1.1～4.0 times of induction furnace 101 capacity, and the depth-width ratio of vacuum reaction chamber 104 is 2.5～8.0.
Magnesium slag of the present invention is carried sparging unit 111～115, carry spray tube 115 ports to immerse in the ferrosilicon liquid 109 magnesium slag and spray into magnesium slag, magnesium slag swept along by the ferrosilicon liquid of circulation and thorough mixing together, periodically through vacuum reaction chamber 104.
The top of vacuum reaction device of the present invention is provided with the quantitative lift pump of the magnesium vapor condensing surface 206, magnesium liquid riser tube 204, the magnesium liquid that are communicated with it 207, the magnesium liquid spray thrower 210 in magnesium liquid riser tube 204 exits, magnesium liquid holder 202.
Magnesium vapor condensing surface of the present invention 206 upper ends connect vacuum suction device; As shown in Figure 1; Above the magnesium vapor condensing surface, connect vacuum and cleaning apparatus pipe connecting 208; Be connected to cleaning apparatus and vacuum suction device through 208, this vacuum and cleaning apparatus pipe connecting 208 then are provided with vacuum connection tube valve 209 with magnesium vapor condensing surface 206 places of connection.Realize the vacuum reaction device is carried out vacuum suction through open vacuum pipe connecting valve 209.
Available gas flame, Flame of Natural Gas, electric arc or plasma arc are at first with vacuum reaction chamber 104 and single-dip pipe 102 pre-heating temperature elevations to 1000～1500 ℃.Open the argon gas winding-up pipe 120 winding-up argon gas that the induction furnace bottom air permeation device is communicated with; With temperature is that 1350～1600 ℃ siliceous 55% ferrosilicon liquid is blended in the induction furnace 101; Adopt lobe pump and water-ring pump vacuum-pumping system or sliding vane rotary pump and oily topping-up pump group again, perhaps steam ejector pump system group forvacuum.Horizontally rotate and hoisting appliance owing to set up on the vacuum reaction device; Can be that the vacuum reaction device of 600～1000Pa drops to 200～1000mm under the ferrosilicon liquid level that the single-dip pipe mouth immerses induction furnace then with the forvacuum degree; Seal closure fusing when the single-dip pipe mouth; Open the argon gas valve immediately and introduce the argon gas stream of water conservancy diversion to single-dip pipe 102; And increasing the argon gas stream of introducing through the bottom blowing air permeation device 103 of induction furnace, ferrosilicon liquid self-induction stove 101 to vacuum reaction chamber 104 returns induction furnace 101 and carries out annularly flow, simultaneously; Continue heat temperature raising with the ruhmkorff coil of the power input 800～2000kw/t of unit, be preheated to 800～1100 ℃ and contain MgO 80%, CaO 10%, Al what get ready
2O
310% magnesium slag passes through injector; Speed with 10～70kg/min is injected in the circulation silicon flow in the induction furnace; Silicon generation reduction reaction in magnesium slag and the high temperature ferrosilicon liquid under the vacuum condition; Generate magnesium vapor, keep 650 ℃ the magnesium vapor condensing surface and the magnesium drop 211 cooling absorption liquefaction of magnesium liquid spray thrower 210 ejections through temperature, regularly discharging a part of liquid magnesium pours into magnesium ingot.Regularly slag is discharged on ferrosilicon liquid surface from induction furnace.Siliceous less than 30% the time when ferrosilicon liquid, it is siliceous greater than 30% in induction furnace, to add siliceous 75% ferrosilicon or industrial silicon adjustment ferrosilicon liquid, continues refining magnesium.Regularly stop production, get rid of residual ferrosilicon liquid, and add siliceous 75% ferrosilicon, industrial silicon, commercial-purity aluminium, the adjustment composition, production contains ferro-silicon, as refining magnesium sub product.In actual production, the high-temperature slag of discharge reclaims heat energy through heat exchange, realizes the energy recovery utilization.Be convenient circulation next time, in storage magnesium jar, keep a part of magnesium liquid.Through maintenance and replacing parts, drop into the new production cycle.
Embodiment of the present invention 2, for making things convenient for order of representation, specially number with 601,602 etc.:
601---the medium-frequency induction furnace 101 that power is 8000kw.100 centimetres of end diameters, 160 centimetres of back cut diameters, 180 centimetres of the degree of depth in the induction furnace prepare 6 tons siliceous 55% ferrosilicon and melt 1550 ℃ of temperature.Feed argon gas stream, flow 60NL/min through bottom blowing air permeation device 103 before the fusing.4 tons of the ferrosilicon of fusing siliceous 75% in another induction furnace.
602---70 centimetres of vacuum reaction chamber diameters, 450 centimetres of height.45 centimetres of single-dip pipe 102 internal diameters, 130 centimetres of length adopt the silicon carbide refractory material.Be preheated to 1000 ℃ to vacuum reaction chamber 104 and single-dip pipe 102 liners with Flame of Natural Gas.
603---get 13 tons of preheating temperatures to 800 ready and ℃ contain magnesian magnesium slag.Wherein MgO content 80%, CaO content 10%, Al
2O
3Content 10%, granularity 0.01～2mm.Be stored in the feed chamber 111.
604---open vacuum connection tube valve 209 and magnesium liquid holder valve 205, close magnesium liquid riser tube valve 203 and condensing surface valve 212, in magnesium liquid holder 202, be blended into 150 kilograms of molten metal magnesium, 700 ℃ of temperature.Close magnesium liquid holder valve 205 then, open condensing surface valve 212.
605---when preheating vacuum reaction chamber 104 inner wall temperatures reach 1000 ℃, remove Sweet natural gas and add thermal-flame.Single-dip pipe 102 lower port with the sealing of iron sheet seal closure, are vacuumized with single-dip pipe 102 through vacuum and 208 pairs of vacuum reaction chambers of cleaning apparatus pipe connecting 104 with vacuum pump system.Through being located at the argon gas winding-up pipe 110 that single-dip pipe 102 lower port are higher than 35 centimeters, spray into the water conservancy diversion argon gas, flow 50NL/min, gauge pressure 0.1～0.5MPa.
606---when vacuum reaction chamber 104 internal pressures reach 10000pa, induction furnace 101 is slowly risen, single-dip pipe 102 and lower port are submerged under the ferrosilicon liquid level with 65 centimetres with induction furnace body of heater hoisting appliance 108.Horizontally rotate and hoisting appliance owing to set up on the vacuum reaction device, then also can make single-dip pipe 102 and lower port be submerged under the ferrosilicon liquid level through the position of up-down vacuum reaction device with 65 centimetres.Continue to vacuumize making vacuum reaction chamber 104 pressure reach 800Pa then, and keep this pressure and continue refining magnesium process.
607---along with the fusing of single-dip pipe 102 port sealing iron sheets, the interior ferrosilicon liquid 109 of induction furnace rises under vacuum action and gets in single-dip pipe 102 and the vacuum reaction chamber 104.Under vacuum and the driving of argon gas expanded by heating, ferrosilicon liquid self-induction stove 101 sprays in the vacuum reaction chamber 104 through single-dip pipe 102, in single-dip pipe 102 opposite sides backflow induction furnace 101, forms the circulation of ferrosilicon liquid again.
608---close down feed chamber valve 114, open feed chamber valve 113, magnesium slag gets into feed chamber 112 down in the feasible upward feed chamber 111, closes feed chamber valve 113 then, opens down feed chamber valve 114.
609---through being ferrosilicon liquid 109 inside of the magnesium slag conveying spray tube 115 winding-up magnesium slags entering induction furnaces 101 of carrier gas with the argon gas, injection rate is 30kg/min, and carrier gas gauge pressure 0.1～1.2MPa, flow are 800NL/min.Winding-up is 60 minutes continuously.
610---open magnesium liquid holder valve 205 and magnesium liquid riser tube valve 203, start the quantitative lift pump 207 of magnesium liquid, with the speed spray of 30 kilograms of magnesium liquid of PM.
611---stop the magnesium slag of jetting, stop the carrier gas input simultaneously.
612---argon gas speed was kept 10 minutes to 130NL/min in the increase argon gas winding-up pipe 110 and 120.
613---reduce in the argon gas winding-up pipe 110 and 120 argon gas speed and kept 10 minutes to 40NL/min.
614---get rid of the 109 top slag blankets of ferrosilicon liquid in the induction furnace 101 clean from slag trough 117.
615---close the quantitative lift pump 207 of magnesium liquid, close magnesium liquid holder valve 205 and magnesium liquid riser tube valve 203
616---open magnesium leakage fluid dram 213 release portion liquid metal magnesiums 201, effusive magnesium liquid is used for refining, alloying or ingot casting.
617---close magnesium leakage fluid dram 213.
618---siliceous 75% the ferrosilicon liquid that from another induction furnace, will melt injects induction furnace 101,600 kilograms of the amounts of being blended into.
619---repeat 608～617 operation.
620---be blended into 600 kilograms of siliceous 75% the ferrosilicon liquid of fusing once more in the induction furnace 101.
621---repeat 608～617 operation.
622---be blended into 600 kilograms of siliceous 75% the ferrosilicon liquid of fusing once more in the induction furnace 101.
623---repeat 608～617 operation.
624---be blended into 600 kilograms of siliceous 75% the ferrosilicon liquid of fusing once more in the induction furnace 101.
625---repeat 608～617 operation.
626---be blended into 600 kilograms of siliceous 75% the ferrosilicon liquid of fusing once more in the induction furnace 101.
627---repeat 608～617 operation.
628---be blended into 600 kilograms of siliceous 75% the ferrosilicon liquid of fusing once more in the induction furnace 101.
629---repeat 609～617 operation.
630---stop to vacuumize, close condensing surface valve 212 and vacuum connection tube valve 209.
631---from argon gas winding-up pipe 110 and 120, continued to be blown into argon gas 10 minutes, it is 150NL/min. that flow increases, and vacuum reaction device internal pressure is charged to 0.1MPa.
632---operation sense is answered furnace body hoisting appliance 108, and induction furnace 101 is slowly descended, and breaks away from ferrosilicon liquid 109 in the induction furnace fully until the port of single-dip pipe 102.
633---open magnesium leakage fluid dram 213, discharge all liquid metal magnesiums 201, be used for refining, alloying or ingot casting.
634---the silicone content of ferrosilicon liquid 109 in the sampling analysis induction furnace 101, be blended into 320 kilograms of siliceous 75% ferrosilicon, the silicon content that makes ferrosilicon liquid 109 in the induction furnace 101 is 45%.
635---removing with the argon gas is the powder conveying spray tube 115 of carrier gas, and operation induction furnace tilting mechanism 107 makes induction furnace 101 upsets, pours out remaining ferrosilicon liquid 109, ingot casting, condensation.
In the present embodiment, available gas flame, Flame of Natural Gas, electric arc or plasma arc are with vacuum reaction chamber 104 and single-dip pipe 102 pre-heating temperature elevations to 1000～1500 ℃.Obtain 5170 kilograms in magnesium altogether, consume 5920 kilograms of siliceous 75% ferrosilicon altogether, consume 4000 kilograms of siliceous 45% ferrosilicon, sub product obtains 6245 kilograms siliceous 45% ferrosilicon.The element silicon consumption of ton magnesium is 663 kilograms so, and ferro element consumption is 47 kilograms.Compare, production of magnesium by pidgeonprocess, ton magnesium consumes 1.2 tons of ferrosilicon, and promptly ton magnesium consume silicon element is 900 kilograms, 300 kilograms of ferro elements.In the above embodiment of the present invention, the consumption of ton magnesium element silicon reduces 26%, and ferro element consumption reduces 84%.
Through metering, in the present embodiment, ton magnesium energy consumption is 9200kwh, and the power consumption of production of magnesium by pidgeonprocess reduction link ton magnesium is 14400～18000kwh, so ton magnesium energy consumption reduces by 36%～49%.
Reduction refining magnesium process of the present invention, the reduction jar that does not use high temperature steel to process has saved heat-resisting steel material consumption, has reduced production cost.
Reduction refining magnesium process of the present invention contains the Natural manganese dioxide breeze through constantly spraying into, and periodically deslagging and the ferrosilicon liquid that is blended into high silicon can be realized serialization production.
Technology of the present invention is fit to maximize with equipment, realizes mechanize, robotization easily, reduces labour intensity, realizes the accurate quantification operation.The present invention is owing to adopt vacuum circular flow; Liquid ferrosilicon liquid and Natural manganese dioxide pulvis thorough mixing stir, and reaction interface is long-pending to be increased greatly, and " three pass " process of chemical reaction process and transmission amount, heat transfer, mass transfer is strengthened; Production efficiency greatly improves, and is the developing direction of modern metallurgical industrial technology.
Claims (9)
1. the single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device is characterized in that, comprising:
The vacuum reaction device; The single-dip pipe (102) that it comprises vacuum reaction chamber (104), be arranged on the tongued and grooved flanges disk cover (119) at vacuum reaction chamber (104) top, vacuum reaction chamber (104) bottom connects is on the top of vacuum reaction chamber (104) and the electric arc or the plasma boiler of sidewall setting and be attached to horizontally rotating and hoisting appliance on the vacuum reaction device;
Heating unit, it is arranged on the below of vacuum reaction device, and be one can fascinate, liftable power frequency or medium-frequency induction furnace (101);
Magnesium slag is carried sparging unit; It magnesium slag storing unit (111,112,113,114) that comprises a plurality of connections is carried spray tube (115) with the magnesium slag that an end is connected with the magnesium slag storing unit of a plurality of connections; Wherein, magnesium slag carry the other end of spray tube (115) to stretch to saidly to fascinate, in liftable power frequency or the medium-frequency induction furnace (101);
At least one magnesium liquid is collected and storing unit; It is arranged on the upper outside face of vacuum reaction chamber (104), it comprises the magnesium vapor condensing surface (206) that is communicated with vacuum reaction chamber (104), be arranged on condensing surface valve (212) on the magnesium vapor condensing surface (206), be arranged on magnesium vapor condensing surface (206) top magnesium liquid spray thrower (210), be arranged on the magnesium liquid holder (202) and vacuum that is connected vacuum suction device and cleaning apparatus successively and cleaning apparatus pipe connecting (208) of magnesium vapor condensing surface (206) bottom.
2. according to the said magnesium smelting device of claim 1, it is characterized in that: said vacuum suction device is lobe pump and water-ring pump group, sliding vane rotary pump and oily topping-up pump group, or steam ejector pump system group.
3. according to the said magnesium smelting device of claim 1; It is characterized in that: vacuum reaction chamber (104) shell is a box hat; Its liner for asbestos plate, paraffin stone or aluminium sesquioxide hollow ball be the thermofin of material and siliceous with high alumina matter, corundum, carbonaceous or carbonization be the flame retardant coating of material, and said flame retardant coating is positioned at the outside of said thermofin; Vacuum reaction chamber (104) volume is 1.1～4.0 times of induction furnace (101) capacity, and the depth-width ratio of vacuum reaction chamber (104) is 2.5～8.0.
4. according to the said magnesium smelting device of claim 1; It is characterized in that: the single-dip pipe (102) that vacuum reaction chamber (104) bottom connects is the branch body component of said vacuum reaction device; The single-dip pipe wall is set up the argon gas winding-up pipe I (110) of water conservancy diversion; Single-dip pipe (102) liner is high alumina matter, carbonaceous or silicon carbide refractory material stamp mass, and it highly is 0.6～2.0 meter, and its internal diameter and vacuum reaction chamber (104) internal diameter ratio is 0.30～0.80.
5. according to the said magnesium smelting device of claim 1; It is characterized in that: magnesium liquid is collected and storing unit also comprises the magnesium liquid holder valve (205) that is arranged on the magnesium liquid holder (202), is arranged on vacuum connection tube valve (209) and magnesium liquid lifting gear on vacuum and the cleaning apparatus pipe connecting (208); Wherein said magnesium liquid lifting gear comprises: an end and magnesium vapor condensing surface (206) are communicated with, and the magnesium liquid riser tube (204) of the other end and magnesium liquid holder (202) connection, are arranged on the magnesium liquid riser tube valve (203) on the magnesium liquid riser tube (204) and are arranged on the quantitative lift pump of magnesium liquid (207) on the magnesium liquid riser tube (204).
6. according to the said magnesium smelting device of claim 1, it is characterized in that: magnesium slag conveying spray tube (115) is arranged on the tip position of vacuum reaction chamber (104), or the sidewall locations of the position, middle and upper part of vacuum reaction chamber (104).
7. an application rights requires the process for smelting magnesium method of 1 said single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device, and said method comprises the steps:
(1) prepares the refining magnesium raw material: contain MgO 20～85%, CaO 0～60%, Al
2O
30～40%, surplus is the magnesium slag of impurity; Prepare reductive agent: siliceous 30～65% ferrosilicon, siliceous 74～82% ferrosilicon or siliceous 97% industrial silicon, and the mass ratio of silicon is 2.5～15 in magnesium slag and the ferrosilicon:
(2) with gas flame, Flame of Natural Gas, plasma arc or other electric arc with vacuum reaction chamber (104) and single-dip pipe (102) pre-heating temperature elevation to 1000～1500 ℃; Simultaneously; Seal closure is installed in single-dip pipe (102) port, and the vacuum tightness of forvacuum reaction unit reaches 350～10000Pa; The argon gas winding-up pipe II (120) that again induction furnace (101) bottom blowing air permeation device (103) is communicated with opens Argon; 1350 ℃～1600 ℃ ferrosilicon liquid heat are blended in the induction furnace (101); Ruhmkorff coil (105) energising heating; Start and horizontally rotate with hoisting appliance and with 200～1000mm under single-dip pipe (102) the insertion ferrosilicon liquid level of vacuum reaction device; Or hoisting appliance lifting induction furnace (101) height that induction furnace (101) is set up is opened the argon gas stream of argon gas winding-up pipe I (110) to single-dip pipe (102) sidewall introducing water conservancy diversion simultaneously so that single-dip pipe (102) is inserted in the ferrosilicon liquid;
(3) after the seal closure fusing of single-dip pipe (102) port; Pyritous ferrosilicon liquid sprays in the vacuum reaction chamber (104) through single-dip pipe (102) continuously; In opposite side continuous backflow to the induction furnace (101) of part ferrosilicon liquid via single-dip pipe (102); Thereby the ferrosilicon liquid in the induction furnace (101) rises to vacuum reaction chamber (104) through single-dip pipe (102) one sides and is back in the ferrosilicon molten bath of induction furnace (101) through single-dip pipe (102) opposite side, opens the ferrosilicon liquid of plasma arc or other arc powers heating circulation simultaneously;
The magnesium slag that (4) will be preheated to 800～1100 ℃ carries spray tube (115) to spray into 10～80kg/min speed in 1350～1600 ℃ the circulation of ferrosilicon liquid through magnesium slag; The magnesium vapor stream that generates upwards flows along the vacuum reaction device; Flowing into temperature through condensing surface valve (212) is in 650～700 ℃ the condensing surface (206); Start the quantitative lift pump of magnesium liquid (207) simultaneously, make magnesium liquid spray thrower (210) spray magnesium liquid form magnesium liquid, flow in the magnesium liquid holder (202) to catch and to absorb magnesium vapor; Regularly discharge, cast magnesium ingot; Residual gas in vacuum reaction device and the magnesium vapor condensing surface will get into cleaning apparatus through vacuum and cleaning apparatus pipe connecting (208) through vacuum connection tube valve (209), discharged by vacuum-pumping system at last.
8. according to the said magnesium refining method of claim 7; It is characterized in that: along with the consumption of silicon in the ferrosilicon liquid; Be blended into silicon content and be higher than the ferrosilicon liquid of silicon content in the induction furnace; Perhaps add in solid ferrosilicon, the industrial silicon one or both, with the silicon content of keeping ferrosilicon liquid in the induction furnace within 30～65% scopes.
9. according to the said magnesium refining method of claim 7, it is characterized in that: said magnesium refining method is further comprising the steps of:
(1) regularly gets rid of slag liquid;
(2) regularly in induction furnace (101) melt, be blended into siliceous 75% fusion ferrosilicon liquid, or utilize magnesium slag to carry industrial silicon that spray tube sprays into siliceous 30～65% ferrosilicon, siliceous 74～82% ferrosilicon or siliceous 97% to replenish ferrosilicon liquid silicon content;
(3) before the periodicity production blowing out; Close vacuum connection tube valve (209), condensing surface valve (212) and magnesium liquid holder valve (205); Continuation feeds argon gas when the pressure of vacuum reaction device reaches 0.1MPa through the tunger tube of water conservancy diversion; Begin to reduce the induction furnace position or promote vacuum reaction device height,, rotate to the preparation station so that single-dip pipe (102) is broken away from ferrosilicon liquid level and induction fire door;
(4) periodically before the blowing out, one or more that add ferrosilicon, industrial silicon, technically pure iron, commercial-purity aluminium are adjusted residual ferrosilicon liquid composition, cast siliceous at least iron alloy, as refining magnesium sub product.
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| CN102590071B (en) * | 2012-02-15 | 2013-12-18 | 航天科工防御技术研究试验中心 | Intergranular corrosion test device |
| CN103184316B (en) * | 2013-04-15 | 2015-02-25 | 中国重型机械研究院股份公司 | Novel vacuum tank device and method |
| CN103589879A (en) * | 2013-11-20 | 2014-02-19 | 北京环宇冠川等离子技术有限公司 | Magnesium metal smelting method and device employing plasma torch heating technology |
| CN103882246B (en) * | 2014-01-08 | 2015-02-25 | 中国重型机械研究院股份公司 | Vacuum magnesium manufacturing device and vacuum magnesium manufacturing method |
| 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 |
| CN104561602B (en) * | 2015-01-28 | 2017-09-19 | 牛强 | The method that ferrosilicon bath step reduces magnesium-smelting silicothermic process coproduction liquid containing ferrochrome |
| CN104651636B (en) * | 2015-02-06 | 2016-08-24 | 牛强 | Vacuum electric heat refining magnesium equipment with protection device |
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| US4888052A (en) * | 1987-06-08 | 1989-12-19 | Ralph Harris | Producing volatile metals |
| CN101020969A (en) * | 2007-03-20 | 2007-08-22 | 罗希文 | Sealed vacuum electrically heated furnace as internally heating continuous magnesium producing apparatus |
| CN101748295A (en) * | 2008-12-17 | 2010-06-23 | 贵阳铝镁设计研究院 | Device for smelting magnesium by silicothermic process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4888052A (en) * | 1987-06-08 | 1989-12-19 | Ralph Harris | Producing volatile metals |
| CN101020969A (en) * | 2007-03-20 | 2007-08-22 | 罗希文 | Sealed vacuum electrically heated furnace as internally heating continuous magnesium producing apparatus |
| CN101748295A (en) * | 2008-12-17 | 2010-06-23 | 贵阳铝镁设计研究院 | Device for smelting magnesium by silicothermic process |
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Application publication date: 20101215 Assignee: Aegis Holding Group Co Ltd Assignor: Niu Qiang Contract record no.: 2014330000203 Denomination of invention: Single-dip pipe silicon iron bath vacuum circulated magnesium-smelting device and method Granted publication date: 20121003 License type: Exclusive License Record date: 20140527 |
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Effective date of registration: 20220406 Address after: 311100 room B205, 2f, building 3, No. 88, Longyuan Road, Cangqian street, Yuhang District, Hangzhou, Zhejiang Province Patentee after: Hangzhou Jiman iron Hydrogen Energy Technology Co.,Ltd. Address before: 100864, Beijing Xicheng District Three Li River Road, 52, Chinese Academy of Sciences Work Bureau Patentee before: Niu Qiang |