CN105567969B - Microwave carbon method process for smelting magnesium - Google Patents
Microwave carbon method process for smelting magnesium Download PDFInfo
- Publication number
- CN105567969B CN105567969B CN201510936571.0A CN201510936571A CN105567969B CN 105567969 B CN105567969 B CN 105567969B CN 201510936571 A CN201510936571 A CN 201510936571A CN 105567969 B CN105567969 B CN 105567969B
- Authority
- CN
- China
- Prior art keywords
- magnesium
- magnesia brick
- microwave
- smelting
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Microwave carbon method process for smelting magnesium of the present invention is related to refining magnesium technical field.The magnesia brick being pressed into after the levigate giobertite to 120 mesh is mixed with the levigate semi-coke to 100 mesh with 1: 0.7 is preheated：Under the vacuum pressures microwave heating to 1100 DEG C, the magnesium restored in magnesia brick steam is made to reach peak-peak to 1300 DEG C again；Magnesia brick is made to be detached from microwave heating when extending to 23 30min and enters microwave delay effect and waste-heat state, magnesia brick is made to continue carbon reduction reaction and reduction magnesium steam under energy free state；Under vacuum pressure and magnesium steam pressure itself collective effect, it is that 900 1000 DEG C of magnesium steam is placed under the conditions of 450 500 DEG C and crystallizes to restoring temperature in magnesia brick, obtains high-purity crystallized ring magnesium；Slag charge temperature of the magnesia brick after smelting is discharged when being down to 20 DEG C；The microwave carbon method process for smelting magnesium in next period is carried out later.For refining magnesium.Magnesium new technology is refined for microwave energy carbon method.
Description
Technical field
Microwave carbon method process for smelting magnesium of the present invention, is related to metallurgical technology field；More particularly to the skill of microwave carbon method process for smelting magnesium
Art field.
Background technology
The mankind in 1755 are found that the compound of magnesium, and magnesium metal is found for the first time by the mankind within 1774, and with Greece ancient city
Magnesia is named, symbol of element Mg.Use value it has been identified within 1808, Germany is initially used for industry within 1886, now
Has 129 years history.In practical metal material, magnesium and its alloy density are low, are known as the super light material of 21 century.It will be ceramic
Reinforcement adds in magnesium, is remarkably improved elasticity modulus, intensity, wear-resisting and high temperature resistance, and magnesium has more with other metal phase ratios
Low density and higher specific stiffness and good damping and amortization apply with keen interest, even more current state in Aeronautics and Astronautics industry
The material of highly desirable use, is widely applied prospect, is just showing situation in the ascendant in anti-and high-tech sector.Magnesium
Application field also has metallurgy, chemistry, electricity, sacrificial anode, fireworks, 3C Product etc..Transportation department's discharge capacity is reduced finding
During strategy and method, light-weight design is that automobile, train or aircraft is made to put forward efficient preferable solution.Magnesium subtracts than steel
It is light by 55%, mitigate 25% compared with aluminium, certain components mitigate 47% weight compared with aluminium.Material can be effectively reduced by magnesium
The weight of material is, it can be achieved that saving fuel and reducing the purpose of discharge amount of exhaust gas.The metal that wherein aviation of Germany center (DLR) is made
Magnesium LCA (Life cycle analysis) development of projects shows a kind of --- magnesium is as light material --- answering for various weight sensitives
With providing considerable potentiality.For this purpose, countries in the world extremely pay attention to the production of magnesium with research.
There are three the stages for magnesium metal development：Chemical method stage, fused salt electrolysis process stage, thermal reduction stage.China 1954
Year has built Fushun magnesium workshop with magnesite chlorination electrolysis, produces 3000 tons per year, has produced first piece of metal magnesium ingot of new China.In
State was to 87.39 ten thousand tons of magnesium metal annual output in 2014, and 290.13 hundred million yuan of the output value, China is Chan Mei big countries and big export country.Cause
Global climate change and energy-saving and emission-reduction, so Smelting magnesium technology and equipment are taken seriously.
According to national conditions, China uses production of magnesium by pidgeonprocess substantially.Pidgeon process is external heating, by dolomite (MgCO3CaCO3)
Calcine (1130 DEG C -1230 DEG C) in rotary kiln, it is ground Fluorspar Powder (CaF295%) is added to mix with ferrosilicon powder (FeS275%),
Ball (ball-making pressure 8.5-25.8MPa) processed is placed in high temperature alloy cylinder of steel, with 1210 DEG C -1250 DEG C of temperature in reduction furnace
And original production crude magnesium is gone back under 1.33-13.3Pa vacuum.By flux-refining, ingot casting, surface treatment, that is, obtain metal magnesium ingot.Skin
River method refining magnesium directly can make raw material using widely distributed, rich reserves dolomite resources；Natural gas, coal gas, again can be utilized
Oil and alternating current etc. are heat source；Technological process and equipment are simpler, and small investment of founding the factory, production scale is flexible, the purity of finished product magnesium
The features such as high；Its furnace body is small, build easily, technical difficulty it is small, along with before China to the less-restrictive of environment and resource, because
This, Pidgeon process " in full flourish ".It should say, this is that China's metallurgy of megnesium industry grows up in specific environment under the conditions of,
With certain characteristic.But having insufficient, defect and drawback existing for known technology Pidgeon process is：Energy consumption is high, to ring
Border is seriously polluted, equipment life is short and it is of high cost, production capacity is small and purity is low and of high cost.It is exactly specifically：1., energy consumption
It is high：Pidgeon process is essentially all the heat generated with liquid fuel, gaseous fuel or solid fuel with the heat source of external heat, and its
It with solid fuel coal is fuel that the middle overwhelming majority, which is, often produces one ton of magnesium metal and takes around the fat coal of 10t, if pressed
The coal consumption of 2.5kWh/kg coal power generations calculates, this 10t fat coal is equivalent to 25000kWh, it can be seen that, the use of coal is fuel, it is hot
Efficiency is very low, and using solid coal (including liquids and gases fuel), for fuel, why the thermal efficiency is low, is because of fuel combustion
Most of heat of generation is taken away by flue gas.2., environmental pollution it is serious：Pidgeon process is using solid, liquids and gases fuel
It refines magnesium and discharges excessive burning gases, cause great environmental pollution.3., equipment life it is short and of high cost：Pidgeon process uses
Outside is heated, and vacuum degree is high in the pipe of equipment, and very serious to the damage of high temperature steel alloy, the service life of equipment is short；Meanwhile
Cost shared by the consumption of equipment is very big, smelts 1 ton of magnesium metal, converts into equipment and consumes 1500~2000 yuan, so of high cost.④、
Production capacity is small and purity is low and of high cost：Pidgeon process is stove external heat, and by heat transfer, (inner vacuum becomes under the high temperature conditions with furnace body
Shape) limitation, the diameter of reacting furnace-e/or is just restricted, therefore single furnace output is also just restricted, certain in order to reach
Production scale, it has to manufacture more reacting furnaces, considerably increase furnace body and auxiliary device manufacturing expense and investment, this shape
The labor intensity of condition is big, can not realize that big industrialized production, the degree of automation are low；Simultaneously as coal consumption is high, reducing agent consumption
The reasons such as the consumption of more, tank material is big, cause of high cost, cause China's magnesium-smelting plant almost without profit.
In recent years, microwave heating technique rapidly develops, and has been widely used for the drying, heating and powder of various materials
Calcining.Microwave is a kind of electromagnetic wave of frequency in 300~300000MHz, i.e., wavelength is the electromagnetic wave of 100cm-1mm, and microwave adds
Heat is by generating microcosmic electric current in material internal, the electrical energy dissipation of material internal being caused to directly heat material, it is not required to
Heat transfer that will be from outward appearance to inner essence.Therefore, microwave heating does not need to the biography as traditional fuel type heating or resistance-type heating
Thermal process, energy can directly be absorbed by material and realize whole uniformly heating as caused by microwave generator.Microwave has choosing
Selecting property heating material, the outstanding feature and advantage that heating rate is fast, the efficiency of heating surface is high, and it is anti-with reduction reaction temperature, shortening
Between seasonable, the advantages that energy-saving apparent.Therefore, development theories research carries out advanced, efficient microwave calcination new process research
It is of great significance.However, it is worth noting that：At present, for the system research of microwave calcination and theoretical system can be formed
Large-scale smelting equipment and control technology do not occur also.
Professional knowledge and working experience and the excelsior unremitting pursuit to cause based on inventor, conscientious and abundant
Investigation, on the basis of understanding, analysis, summary, research has known technology and present situation, it is rich to fully take into account China's magnesium ore resource
Richness, wherein giobertite reserves account for about the advantage of world's gross reserves 1/4 up to 3,000,000,000 tons, and scientific and reasonable introducing microwave adds
This new energy of thermal technology, spy take " microwave heating magnesite refines magnesium with semi-coke " key technology, have succeeded in developing " microwave carbon method
Process for smelting magnesium ".I.e.：Under the conditions of relative vacuum, using microwave as the energy, magnesia brick made of magnesite and semi-coke is implemented to heat,
Magnesium steam is crystallized to the magnesium metal for obtaining high-purity, which saves magnesite calcining and produce magnesia process, shortens technique
Flow, it is of the invention compared with existing known technology Pidgeon process：Pidgeon process be external heating, both the heating energy source applied it is different；
The raw material of the present invention be magnesite and semi-coke, especially using semi-coke as reduction raw material, have not been reported, of the invention and Pidgeon process phase
Raw material than using reduction is different；The present invention is that Pidgeon process and other various magnesium refining methods can not be compared, effective to solve
Deficiency, defect and the drawback for existing known technology and the present situation of having determined are to existing refining magnesium known technology and the subversive skill of present situation
Art revolution.
Invention content
The present invention is using " microwave heating magnesite refines magnesium with semi-coke " key technology, by the levigate giobertite to 120 mesh
The magnesia brick being pressed into after being mixed with the levigate semi-coke to 100 mesh with 1: 0.7 is preheated：Microwave heating is to 1100 under the vacuum pressures
DEG C, the magnesium restored in magnesia brick steam is made to reach peak-peak to 1300 DEG C again；Magnesia brick is detached from when extending to 23-30min
Microwave heating and entrance microwave delay effect and waste-heat state make magnesia brick continue carbon reduction under energy free state anti-
It should and restore magnesium steam；Under vacuum pressure and magnesium steam pressure itself collective effect, it is to restoring temperature in magnesia brick
900-1000 DEG C of magnesium steam crystallizes under the conditions of being placed in 450-500 DEG C, obtains high-purity crystallized ring magnesium；Slag of the magnesia brick after smelting
Material temperature degree discharges when being down to 20 DEG C；The microwave carbon method process for smelting magnesium in next period is carried out later.
It is by the purpose of the invention reached：1., using " microwave heating magnesite and semi-coke refine magnesium " key technology, provide
" microwave carbon method process for smelting magnesium " new technology.2., the present invention be microwave heating so that refining magnesium changes tradition using solid coal or liquid
The way of body and gaseous fuel provides with the new energy of microwave heating and microwave delay effect and waste-heat, makes microwave thermal
It can be made full use of, there is energy-saving protrusion advantageous effect.3., the present invention is pressed by giobertite and semi-coke group
Magnesia brick is provided with chase, is conducive to absorb microwave thermal energy to the maximum extent；The present invention has started refining using semi-coke as reducing material
Magnesium-reduced novelty innovative technology.4., the present invention by magnesia brick with 600-650 DEG C of preheating temperature 1h, take full advantage of coal
It is agglomeration, can enable effectively to be bonded together as the magnesia brick of reducing material, avoid during magnesium is refined generate spray
Phenomenon is expected, using microwave 300 DEG C or more heating rates are special fast the advantages of.5., the present invention 300-400 DEG C of preheating magnesia brick is existed
Under vacuum pressure 100Pa states with microwave heating to 1100 DEG C when, still with microwave heating 8- under vacuum pressure 10Pa states
10min, in vacuum pressure 10 when making the magnesia brick temperature rise to 1300 DEG C-2Magnesia brick is still made with microwave heating 15-20min under pa states
In the magnesium steam that releases can reach peak-peak.6., the present invention magnesium released in magnesia brick steam is made to reach maximum peak
The state of value continues as far as 23-30min, and the peak-peak of magnesia brick release magnesium steam is made to reach ultimate attainment.7., the present invention make magnesia brick
Release magnesium steam is just detached from microwave heating and enters microwave delay effect and waste-heat state after reaching ultimate attainment, both effective section
About the energy and magnesia brick is made to continue carbon reduction reaction, continue to discharge magnesium steam so as to obtain magnesia brick under energy free state
Advantageous effect.8., the present invention under the collective effect of vacuum pressure and magnesium steam pressure itself, to releasing temperature in magnesia brick
The magnesium steam spent for 900-1000 DEG C crystallizes under the conditions of being placed in 450-500 DEG C, so as to obtain the crystallization ring magnesium of high-purity；This hair
Slag charge of the bright magnesia brick after smelting discharges when temperature is down to 20 DEG C, the temperature and the initial temperature phase of magnesia brick of slag charge discharge
Together, discharging and being conducive to the protection to magnesium smelting device for slag charge is facilitated.9., magnesia brick raw material of the present invention: material magnesium ratio=3: 1 are obtained
It obtained and saves the energy, yield height, quality advantageous effect.10., it is present inventive concept novelty, reasonable design, easy to operate, be convenient for
Implementation, at low cost, effect stability is reliable, can widely be applicable.
To achieve the above object, technical solution provided by the invention is：
A kind of microwave carbon method process for smelting magnesium：
1., magnesia brick prepare：By be 41-47% containing magnesium giobertite with it is carbon containing be 85-87% semi-coke form refining magnesium original
Material；The levigate giobertite to 120 mesh and the levigate semi-coke to 100 mesh are mixed with 1: 0.7 ratio, in 25-30Mpa pressure
Under be pressed into the magnesia brick of long 300mm, high 100mm, the wide 200mm in one end, the wide 150mm of the other end；
2., magnesia brick preheating：By magnesia brick with 600-650 DEG C of preheating temperature 1h, agglomeration by the use of coal makes as reduction
The magnesia brick of material can be bonded together, and avoid generating material spray phenomenon during magnesium smelting reducing；
3., magnesia brick smelt：By the preheating magnesia brick of 300-400 DEG C of temperature of holding with microwave under vacuum pressure 100Pa states
When being heated to 1100 DEG C, still with microwave heating 8-10min under vacuum pressure 10Pa states, when so that the magnesia brick temperature is risen to 1300 DEG C
In vacuum pressure 10-2Still the magnesium restored in magnesia brick steam is made to reach maximum peak with microwave heating 15-20min under Pa states
Value makes magnesia brick be detached from microwave heating and add into microwave delay effect and waste heat when this state being extended to 23-30min always
Warm status so that magnesia brick continues carbon reduction reaction, continues to restore magnesium steam so as to accomplish magnesia brick under energy free state；On
During stating magnesia brick smelting reducing, under the collective effect of vacuum pressure and magnesium steam pressure itself, to being restored in magnesia brick
Temperature is to be crystallized under the conditions of 900-1000 DEG C of magnesium steam is placed in 450-500 DEG C, obtains the crystallization ring magnesium of high-purity；
4., deslagging：The slag charge that magnesia brick leaves after smelting reducing discharges when temperature is down to 20 DEG C；It carries out again later next
The microwave carbon method process for smelting magnesium in a period.
The microwave carbon method process for smelting magnesium is provided with chase on the magnesia brick, is absorbed for increasing in microwave heating
The heat of microwave.
The microwave carbon method process for smelting magnesium, in the magnesia brick smelting reducing, magnesia brick naturally successively have passed through
350-800 DEG C of the first warming up period, 800-1100 DEG C of the second warming up period, 1100-1300 DEG C of third Microwave Heating phase, 1300-800
DEG C the 4th magnesia brick waste heat phase, 800-20 DEG C of the 5th magnesia brick dissipate the warm phase, and magnesia brick becomes slag charge after smelting reducing, treat that slag charge temperature drops
To just identical with the initial temperature of magnesia brick at 20 DEG C, facilitate the discharge of slag charge and be conducive to protection to magnesium smelting device.
The microwave carbon method process for smelting magnesium, the microwave heating use microwave applicator, the microwave applicator
Output general power is 525kW-5250kW, the control of frequency 300-300000MHz, wavelength/m 1-0.01, temperature is in 1100-1300
Between DEG C.
The microwave carbon method process for smelting magnesium, the microwave heating time 30-50min.
The microwave carbon method process for smelting magnesium, the magnesia brick 1500kg disposably smelted complete a reduction cycle and use
When 2h, output reduction Crystalline Magnesium 480kg, magnesia brick raw material: material magnesium ratio=3: 1.
The present invention operation principle and the course of work be：
It is well known that microwave heating has strong relative selectivity to the material heated.For example, aluminium oxide ceramics,
Quartz and organic insulation etc. hardly pick up microwave, and the microwave that microwave generator generates can pass freely through these materials
Material and hardly off-energy.The smelting process of magnesium is the premise and basis of Magnesium Industry.The present invention is exactly the refining of microwave carbon method
The technology of magnesium (i.e. the method for vacuum carbothermy reduction-oxidation magnesium).The purpose of the present invention is refining magnesium, the raw material of magnesium is refined by containing
MgO is the giobertite (MgCO of 41-47%3) with being formed containing the semi-coke that C is 85-87%, by the levigate giobertite to 120 mesh
It is mixed with the levigate semi-coke to 100 mesh with 1: 0.7 ratio, long 300mm, high 100mm, one is pressed under 25-30Mpa pressure
Hold raw material of the magnesia brick of width 200mm, the wide 150mm of the other end as refining magnesium.When using present invention refining magnesium, first magnesia brick is placed on
With 600-650 DEG C of preheating temperature 1h in " preheating close-burning stove " set in addition, agglomeration by the use of coal makes as reduction
The magnesia brick of material can be bonded together, and avoid generating material spray phenomenon during magnesium is refined.By the pre- of 300-400 DEG C of temperature of holding
Hot magnesia brick is put into the furnace body of present invention process technology required " microwave carbon method magnesium refining furnace ", is started " microwave carbon method magnesium refining furnace "
Pumped vacuum systems, furnace body implementation is vacuumized by vacuum tube on " microwave carbon method magnesium refining furnace ", vacuum chamber, steam way.It treats
When vacuum pressure reaches 100Pa, start the microwave applicator in " microwave carbon method magnesium refining furnace ", to " microwave carbon method magnesium refining furnace " furnace body
Interior magnesia brick transmitting microwave, magnesia brick just rise to 1100 DEG C at 350 DEG C, and at this moment vacuum pressure reaches 10Pa, used time 8-10min, this
When just a small amount of magnesium vapor of output come.Waiting be warming up to 1300 DEG C, vacuum pressure rise to 10-2During Pa, used time 15-20min is produced at this time
Raw magnesium steam has reached the maximum peak value.Since the magnesia brick in " microwave carbon method magnesium refining furnace " furnace body is lived under grate effect
Dynamic, after microwave heating 23-30min, magnesia brick has been out microwave heating area, subsequently into microwave delay effect and waste heat
Heating zone so magnesia brick continues to carry out carbon reduction reaction, continues to discharge magnesium steam, thus magnesia brick had not just not only had to the energy but also improved
The yield of magnesium.Under the collective effect of vacuum draft and magnesium vapor pressure, 900-1000 DEG C of magnesium steam enters in addition setting
" condensing crystallizer ".The temperature of " condensing crystallizer " is maintained at 450-500 DEG C, to crystallize magnesium steam, so as to obtain
Obtain the crystallization ring magnesium of high-purity.During above-described refining magnesium, magnesia brick in " microwave carbon method magnesium refining furnace " furnace body from however
Right priority have passed through 350-800 DEG C of the first warming up period, 800-1100 DEG C of the second warming up period, 1100-1300 DEG C of third microwave energy
Heating phase, 1300-800 DEG C of the 4th magnesia brick waste heat phase, 800-20 DEG C of the 5th magnesia brick dissipate the warm phase, lead to the magnesium steam in magnesia brick raw material
Cross that the steam way of " microwave carbon method magnesium refining furnace ", vacuum chamber, vacuum tube crystallizes after being pumped in a manner of vacuumizing and output is high-purity
The crystallization ring magnesium of degree, and magnesia brick raw material just becomes 20 DEG C of slag charge.When slag charge temperature drops to 20 DEG C, open deslagging switch into
Row deslagging.Use of the invention finishes.Smelting next time is proceeded as described above later.The microwave applicator of the present invention
Output general power is 525kW, disposably fills the magnesia brick 1500kg, completes a reduction cycle 2h, output reduction Crystalline Magnesium
480kg, magnesia brick raw material: material magnesium ratio=3: 1.The present invention refines the subversiveness smelting technique revolution of magnesium for magnesite vacuum carbon method, no
Microwave carbon method process for smelting magnesium technology is provided only, and has developed adapt to " the microwave carbon method process for smelting magnesium on this basis
" the microwave carbon method magnesium refining furnace " of technology " and other related devices.It will be another for " microwave carbon method magnesium refining furnace " and other related devices
Outer carry out patent application, is no longer stated in detail herein.
As a result of technical solution provided by the invention；Since present invention employs " microwave heating magnesite and semi-cokes
Refine magnesium " key technology；Due to described in the operation principle and the course of work of the present invention；Since the present invention is by the levigate water chestnut to 120 mesh
The magnesia brick that magnesium ore is pressed into after being mixed with the levigate semi-coke to 100 mesh with 1: 0.7 is preheated：Microwave heating under the vacuum pressures
To 1100 DEG C, the magnesium restored in magnesia brick steam is made to reach peak-peak to 1300 DEG C again；Make magnesium when extending to 23-30min
Brick is detached from microwave heating and enters microwave delay effect and waste-heat state, and magnesia brick is made to continue carbon under energy free state
Reduction reaction and reduction magnesium steam；Under vacuum pressure and magnesium steam pressure itself collective effect, to restoring temperature in magnesia brick
The magnesium steam spent for 900-1000 DEG C crystallizes under the conditions of being placed in 450-500 DEG C, obtains high-purity crystallized ring magnesium；Magnesia brick is after smelting
Slag charge temperature discharge when being down to 20 DEG C；The microwave carbon method process for smelting magnesium in next period is carried out later.Make the present invention with having public affairs
Know that technology and present situation are compared, have the advantages that：
1st, present invention employs " microwave heating magnesite and semi-coke refining magnesium " key technology, so as to provide " microwave carbon method
Process for smelting magnesium " new technology.
2nd, the present invention is microwave heating so that refining magnesium changes tradition doing using solid coal or liquid and gaseous fuel
Method provides with the new energy of microwave heating and microwave delay effect and waste-heat, is made full use of microwave thermal energy,
With energy-saving protrusion advantageous effect.
3rd, the present invention is provided with chase by the magnesia brick that giobertite and semi-coke group are pressed into, and is conducive to absorb to the maximum extent micro-
Wave thermal energy.
4th, the present invention has started the novelty innovative technology of magnesium smelting reducing using semi-coke as reducing material.
5th, the present invention takes full advantage of the agglomeration of coal, can make conduct by magnesia brick with 600-650 DEG C of preheating temperature 1h
The magnesia brick of reducing material can be effectively bonded together, and avoid the generation material spray phenomenon during magnesium is refined.
6th, the present invention by 300-400 DEG C of preheating magnesia brick under vacuum pressure 100Pa states with microwave heating to 1100 DEG C
When, still with microwave heating 8-10min under vacuum pressure 10Pa states, in vacuum pressure when making the magnesia brick temperature rise to 1300 DEG C
10-2Still the magnesium released in magnesia brick steam is made to can reach peak-peak with microwave heating 15-20min under Pa states.
7th, the present invention, which makes to release magnesium steam in magnesia brick and reaches the state of peak-peak, continues as far as 23-30min, makes magnesium
The peak-peak of brick release magnesium steam reaches ultimate attainment.
8th, the present invention make magnesia brick release magnesium steam reach ultimate attainment after be just detached from microwave heating and enter microwave delay effect and
Waste-heat state had not only effectively saved the energy but also magnesia brick is made to continue carbon reduction reaction, so as to obtain magnesia brick in nothing
Continue the advantageous effect of release magnesium steam under energy state.
9th, the present invention is to releasing temperature in magnesia brick under the collective effect of vacuum pressure and magnesium steam pressure itself
900-1000 DEG C of magnesium steam crystallizes under the conditions of being placed in 450-500 DEG C, so as to obtain the crystallization ring magnesium of high-purity.
10th, the slag charge of magnesia brick of the invention after smelting discharges when temperature is down to 20 DEG C, the temperature and magnesium of slag charge discharge
The initial temperature of brick is identical, facilitates discharging and being conducive to the protection to magnesium smelting device for slag charge.
11st, magnesia brick raw material of the present invention: material magnesium ratio=3: 1 obtain and save the energy, yield height, quality advantageous effect.
12nd, it is of the invention to succeed in developing, use MgCO3The byproduct that+2C directly produces magnesium metal is CO, no longer discharges CO2,
Reduce carbon emission, greenhouse effects will not be caused, realize green production, do not generate pollution to environment, be effectively protected ring
Border.
13rd, it is of the invention to succeed in developing, effectively solve the deficiency, defect and drawback of existing known technology and present situation.
It is 14 present inventive concept novelties, reasonable design, easy to operate, it is convenient to carry out, at low cost, effect stability is reliable.
15th, the present invention has the application value of broad spectrum activity, can widely be applicable.
16th, it is of the invention to succeed in developing, effectively raise the technical merit of the industry.
17th, of the invention succeed in developing belongs to the world and initiates, and refining magnesium technology has been increased to a brand-new technical merit,
Outstanding contributions has been made for refining magnesium technology
18th, it is of the invention to succeed in developing, there are great economy interests to country.
Description of the drawings
Figure of description is the technical process window frame schematic diagram of microwave carbon method process for smelting magnesium specific embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawings of the specification, the present invention is described in detail.As shown in Figure of description：
A kind of microwave carbon method process for smelting magnesium：
1., magnesia brick prepare：By be 41-47% containing magnesium giobertite with it is carbon containing be 85-87% semi-coke form refining magnesium original
Material；The levigate giobertite to 120 mesh and the levigate semi-coke to 100 mesh are mixed with 1: 0.7 ratio, in 25-30Mpa pressure
Under be pressed into the magnesia brick of long 300mm, high 100mm, the wide 200mm in one end, the wide 150mm of the other end；
2., magnesia brick preheating：By magnesia brick with 600-650 DEG C of preheating temperature 1h, agglomeration by the use of coal makes as reduction
The magnesia brick of material can be bonded together, and avoid generating material spray phenomenon during magnesium smelting reducing；
3., magnesia brick smelt：By the preheating magnesia brick of 300-400 DEG C of temperature of holding with microwave under vacuum pressure 100Pa states
When being heated to 1100 DEG C, still with microwave heating 8-10min under vacuum pressure 10Pa states, when so that the magnesia brick temperature is risen to 1300 DEG C
In vacuum pressure 10-2Still the magnesium restored in magnesia brick steam is made to reach maximum peak with microwave heating 15-20min under Pa states
Value makes magnesia brick be detached from microwave heating and add into microwave delay effect and waste heat when this state being extended to 23-30min always
Warm status so that magnesia brick continues carbon reduction reaction, continues to restore magnesium steam so as to accomplish magnesia brick under energy free state；On
During stating magnesia brick smelting reducing, under the collective effect of vacuum pressure and magnesium steam pressure itself, to being restored in magnesia brick
Temperature is to be crystallized under the conditions of 900-1000 DEG C of magnesium steam is placed in 450-500 DEG C, obtains the crystallization ring magnesium of high-purity；
4., deslagging：The slag charge that magnesia brick leaves after smelting reducing discharges when temperature is down to 20 DEG C；It carries out again later next
The microwave carbon method process for smelting magnesium in a period.
The microwave carbon method process for smelting magnesium is provided with chase on the magnesia brick, is absorbed for increasing in microwave heating
The heat of microwave.
The microwave carbon method process for smelting magnesium, in the magnesia brick smelting reducing, magnesia brick naturally successively have passed through
350-800 DEG C of the first warming up period, 800-1100 DEG C of the second warming up period, 1100-1300 DEG C of third Microwave Heating phase, 1300-800
DEG C the 4th magnesia brick waste heat phase, 800-20 DEG C of the 5th magnesia brick dissipate the warm phase, and magnesia brick becomes slag charge after smelting reducing, treat that slag charge temperature drops
To just identical with the initial temperature of magnesia brick at 20 DEG C, facilitate the discharge of slag charge and be conducive to protection to magnesium smelting device.
The microwave carbon method process for smelting magnesium, the microwave heating use microwave applicator, the microwave applicator
Output general power is 525kW-5250kW, the control of frequency 300-300000MHz, wavelength/m 1-0.01, temperature is in 1100-1300
Between DEG C.
The microwave carbon method process for smelting magnesium, the microwave heating time 30-50min.
The microwave carbon method process for smelting magnesium, the magnesia brick 1500kg disposably smelted complete a reduction cycle and use
When 2h, output reduction Crystalline Magnesium 480kg, magnesia brick raw material: material magnesium ratio=3: 1.
In above-mentioned specific implementation process：To the pressure of the compacting magnesia brick respectively with 25,26,27,28,29,30Mpa
It is carried out；The magnesia brick is carried out respectively with 600,610,620,630,640,650 DEG C of preheating temperature；To institute
Preheating magnesia brick is stated respectively so that 300,310,320,330,340,350,360,370,380,390,400 DEG C of temperature to be kept to carry out reality
It applies；It is still carried out respectively with 8,9,10min with microwave heating under vacuum pressure 10Pa states to described；Make magnesium to described
In vacuum pressure 10 when brick temperature rises to 1300 DEG C-2Under Pa states still with microwave heating respectively with 15,16,17,18,19,20min
Be carried out and always by this state respectively to extend to 23,24,25,26,27,28,29,30min is carried out；It is right
The microwave heating time is also carried out with 30,35,40,45,50min respectively；Total work is exported to the microwave applicator
Rate is carried out respectively with 525,600,800,1000,1500,2000,2500,3000,3500,4000,4500,5000,5250kW
Implement and frequency respectively with 300,500,1000,5000,10000,50000,80000,100000,120000,150000,
200000th, 230000,250000,280000,300000MHz be carried out and respectively with wavelength/m 1,0.9,0.8,0.7,
0.6th, 0.5,0.4,0.3,0.2,0.1,0.09,0.08,0.07,0.06,0.05,0.04,0.03,0.02,0.01 reality has been carried out
It applies and is carried out respectively with temperature control at 1100,1150,1200,1250,1300 DEG C；To in the magnesia brick respectively with also
Original comes out the magnesium steam that temperature is 900,910,920,930,940,950,960,970,980,990,1000 DEG C and is respectively placed in
450th, it crystallizes under the conditions of 460,470,480,490,500 DEG C and is carried out；Obtain expected good result.
It is above presently preferred embodiments of the present invention, not makees limitation in any form to the present invention；All industry it is general
Logical technical staff can swimmingly implement the present invention by described above；But make differentiation not departing from technical solution of the present invention
Equivalent variations are the equivalent embodiment of the present invention, belong to technical scheme of the present invention.
Claims (6)
1. a kind of microwave carbon method process for smelting magnesium, it is characterised in that：
1., magnesia brick prepare：By be 41-47% containing magnesium giobertite with it is carbon containing be 85-87% semi-coke form refine magnesium raw material；It will
It is levigate to be mixed to the giobertite of 120 mesh and the levigate semi-coke to 100 mesh with 1: 0.7 ratio, it is pushed in 25-30Mpa pressure
The magnesia brick of long 300mm, high 100mm, the wide 200mm in one end, the wide 150mm of the other end is made；
2., magnesia brick preheating：By magnesia brick with 600-650 DEG C of preheating temperature 1h, agglomeration by the use of semi-coke makes as reducing material
Magnesia brick can be bonded together, avoid during magnesium smelting reducing generate material spray phenomenon；
3., magnesia brick smelt：By the preheating magnesia brick of 300-400 DEG C of temperature of holding with microwave heating under vacuum pressure 100Pa states
During to 1100 DEG C, first still with microwave heating 8-10min under vacuum pressure 10Pa states, when so that the magnesia brick temperature is risen to 1300 DEG C
In vacuum pressure 10-2The magnesium restored in magnesia brick steam is made to reach most still with microwave heating 15-20min again under Pa states
Big peak value is always maintained at this state, then on the basis of 15-20min heating, further continues 8-10min to extend to
23-30min is then heated three times, and total heating time is 31-40min, and magnesia brick is made to be detached from microwave heating and into a subtle way at this time
Wave delay effect and waste-heat state, so that magnesia brick continues carbon reduction reaction, so as to accomplish magnesia brick in energy free state
Under continue restore magnesium steam；During above-mentioned magnesia brick smelting reducing, in the collective effect of vacuum pressure and magnesium steam pressure itself
Under, it is crystallized to being restored in magnesia brick under the conditions of the magnesium steam that temperature is 900-1000 DEG C is placed in 450-500 DEG C, obtains high-purity
Crystallization ring magnesium；
4., deslagging：The slag charge that magnesia brick leaves after smelting reducing discharges when temperature is down to 20 DEG C；Carry out next week again later
The microwave carbon method process for smelting magnesium of phase.
2. microwave carbon method process for smelting magnesium according to claim 1, it is characterised in that：Chase is provided on the magnesia brick, is used
In the heat of the increase absorption microwave in microwave heating.
3. microwave carbon method process for smelting magnesium according to claim 1, it is characterised in that：In the magnesia brick smelting reducing, magnesia brick
Naturally it successively have passed through 350-800 DEG C of the first warming up period, 800-1100 DEG C of the second warming up period, 1100-1300 DEG C of third
Microwave Heating phase, 1300-800 DEG C of the 4th magnesia brick waste heat phase, 800-20 DEG C of the 5th magnesia brick dissipate the warm phase, and magnesia brick is after smelting reducing
It is just identical with the initial temperature of magnesia brick when slag charge temperature is down to 20 DEG C as slag charge, it facilitates the discharge of slag charge and is conducive to
Protection to magnesium smelting device.
4. microwave carbon method process for smelting magnesium according to claim 1, it is characterised in that：The microwave heating uses microwave
Heater, microwave applicator output general power is 525kW-5250kW, frequency 300-300000MHz, wavelength/m1-0.01,
Temperature is controlled between 1100-1300 DEG C.
5. microwave carbon method process for smelting magnesium according to claim 1, it is characterised in that：The microwave heating time 30-
40min。
6. microwave carbon method process for smelting magnesium according to claim 1, it is characterised in that：The magnesia brick disposably smelted
1500kg completes a reduction cycle used time 2h, output reduction Crystalline Magnesium 480kg, magnesia brick raw material: material magnesium ratio=3: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510936571.0A CN105567969B (en) | 2015-12-17 | 2015-12-17 | Microwave carbon method process for smelting magnesium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510936571.0A CN105567969B (en) | 2015-12-17 | 2015-12-17 | Microwave carbon method process for smelting magnesium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105567969A CN105567969A (en) | 2016-05-11 |
| CN105567969B true CN105567969B (en) | 2018-06-08 |
Family
ID=55878582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510936571.0A Expired - Fee Related CN105567969B (en) | 2015-12-17 | 2015-12-17 | Microwave carbon method process for smelting magnesium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105567969B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282605A (en) * | 2016-09-14 | 2017-01-04 | 李华梅 | Magnesium oxide produces magnesium metal with carbon with vacuum microwave heating |
| CN106498185B (en) * | 2016-11-01 | 2018-08-31 | 深圳市中启新材料有限公司 | A kind of method of vacuum microwave refining magnesium |
| CN114485148A (en) * | 2022-01-14 | 2022-05-13 | 中南大学 | High-temperature reaction-evaporative crystallization integrated smelting equipment and smelting method based on smelting equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005126802A (en) * | 2003-10-27 | 2005-05-19 | Japan Steel Works Ltd:The | Method for refining magnesium material |
| UA74941C2 (en) * | 2004-04-26 | 2006-02-15 | Fos Internat S A | A metal-thermal process for producing magnesium and vacuum induction furnace for realizing the same |
| CN1304613C (en) * | 2005-10-18 | 2007-03-14 | 昆明理工大学 | Vacuum carbon heat reduction aluminium smelting method |
| CN101397609A (en) * | 2008-09-18 | 2009-04-01 | 昆明理工大学 | Method for preparing magnesium metal by giobertite vacuum carbon thermal reduction |
| CN101376928B (en) * | 2008-10-10 | 2011-01-12 | 重庆高岭投资（集团）有限公司 | Process for smelting magnesium by microwave heating Pidgeon process |
| CN101857924A (en) * | 2010-06-19 | 2010-10-13 | 鹤壁银龙有色金属科技有限公司 | Tank-free vertical electric smelting metallic magnesium reduction furnace |
| CN102277506A (en) * | 2011-08-01 | 2011-12-14 | 开泰镁业有限公司 | Process of smelting magnesium by use of heating method |
| CN103882247B (en) * | 2014-04-10 | 2015-09-02 | 于洪喜 | Microwave heating refining magnesium technology |
-
2015
- 2015-12-17 CN CN201510936571.0A patent/CN105567969B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105567969A (en) | 2016-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106498185B (en) | A kind of method of vacuum microwave refining magnesium | |
| CN107651691B (en) | A kind of method of crystalline silicon cutting waste material preparation high-quality silicon carbide | |
| CN105567969B (en) | Microwave carbon method process for smelting magnesium | |
| CN103979936B (en) | A kind of iron tailings far-infrared ceramic material and preparation method thereof | |
| CN102826833B (en) | Porcelain grey tile without carburization and sintering method thereof | |
| CN101774584B (en) | method for purifying solar-grade silicon | |
| CN104152720B (en) | A kind of method and apparatus of electrical heating reducing metal magnesium and by-product cement grog | |
| CN102992285A (en) | Method and equipment for producing yellow phosphorus by utilizing closed annular heating furnace | |
| CN101892395B (en) | Method for smelting magnesium by decomposition in vacuum through microwaves | |
| CN108529616A (en) | A kind of the high temperature purification technique and device of natural graphite | |
| WO2024056108A1 (en) | Environmentally-friendly device for producing magnesium by means of aluminothermic reduction | |
| WO2024056107A1 (en) | Green and environmentally friendly method for producing magnesium by means of aluminothermic reduction | |
| CN103882247B (en) | Microwave heating refining magnesium technology | |
| CN101418380B (en) | Nontank shaft type electric resistance furnace smelting magnesium apparatus and smelting magnesium method thereof | |
| CN106756107A (en) | A kind of vacuum microwave magnesium smelting device | |
| CN103146863B (en) | Process for non-slag production of iron, aluminum and titanium by utilizing reduction molten-salt growth method | |
| CN105571314B (en) | Microwave carbon method magnesium refining furnace | |
| CN101705374A (en) | Process for improving production rate of metal magnesium by accelerating reduction | |
| CN206457532U (en) | A kind of vacuum microwave magnesium smelting device | |
| CN203782209U (en) | Microwave heating magnesium smelting furnace | |
| CN106586988A (en) | Method for comprehensive recovery of indium and phosphorus from indium phosphide waste material | |
| CN109457075A (en) | A kind of coal-based DR process using assisted Reduction | |
| CN101857924A (en) | Tank-free vertical electric smelting metallic magnesium reduction furnace | |
| CN103589879A (en) | Magnesium metal smelting method and device employing plasma torch heating technology | |
| CN204612504U (en) | A kind of flue gas cooling dust arrester installation of external-heat reduction roasting rotary kiln |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20160511 Assignee: Beijing Sanjin Microwave Technology Co., Ltd. Assignor: Yu Hongxi Contract record no.: 2016990000414 Denomination of invention: Magnesium smelting process with microwave carbon method License type: Exclusive License Record date: 20160929 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Yu Hongxi Document name: Notice of termination of patent right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20201217 |