CN105420516B - The new process of continuity method electric furnace smelting magnesium metal - Google Patents
The new process of continuity method electric furnace smelting magnesium metal Download PDFInfo
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- CN105420516B CN105420516B CN201510749995.6A CN201510749995A CN105420516B CN 105420516 B CN105420516 B CN 105420516B CN 201510749995 A CN201510749995 A CN 201510749995A CN 105420516 B CN105420516 B CN 105420516B
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Abstract
The new process of continuity method electric furnace smelting magnesium metal, it is characterized in that connect, discharge from calcination rotary kiln feeding to insulation batch can, it is fed to quantitative sealed, magnesium steam is restored at 1550 ~ 1600 DEG C to electric furnace smelting again, the magnesium that magnesium steam crystallizer cools down out is liquid magnesium, liquid magnesium is noted to magnesium pot is connect by vacuum suction pumping, and connecing the liquid magnesium in magnesium pot has electric flatcar to be transported to refining plant refining.Slag tap using forehearth that is before electric furnace and being communicated with electric furnace, it is ensured that continuously slag tap under vacuo.Present invention production overall process can realize that mechanization and main production section realize Automated condtrol, and all round process material does not land, and reduce manpower consumption, improve production efficiency, can thoroughly remove dust pollution, improve environment.7150 degree of ton magnesium power consumption of the present invention, the horse profit nanofarad ton magnesium power consumption than France and the U.S. at present reduce 40%；The CO compared with Pidgeon process2、SO2Discharge can reduce by 80%；Production efficiency 25% is improved, reduces energy consumption 50%, reduces production cost 30%.
Description
Technical field
The invention belongs to magnesium metal smelting field, the specific method using electric furnace microwave heating smelting magnesium.
Background technology
Magnesium metal smelting technique is currently produced in man of China and in the world mainly Pidgeon process, semicontinuous hair（That is mug(unit of measure) Buddhist nun
Nanofarad）, chlorination electrolysis.Wherein, because chlorination electrolysis ton magnesium power consumption is up to 20,000 degree or so, cost is too high, so as to lose
The market competitiveness and be eliminated.Next to that the production of magnesium by pidgeonprocess technique that China uses, the technical process is numerous and diverse,（I.e. material calcining,
It is cooled back to normal temperature, milling（150 ~ 200 mesh fine powders）, again by dispensing, large-sized ball press pressure ball, be reloaded into high-chromium-nickel steel matter also
In former tank, external heat carry out reduction 10 ~ 12 hours to 1200 DEG C.Artificial high temperature charging, discharging, due to being external heat, heat energy damage
Consume larger, heat utilization efficiency only has 50% or so, and energy consumption is very high.Other dust pollution is serious, and most of is manual operation, work
Intensity is high, and mechanization degree is low, and single stove production capacity is low, and production cost is high（1.4 ten thousand yuan/ton of magnesium or so）, and price only has 1.32 ten thousand
Yuan/ton magnesium.
The patent No. is " technique of smelting magnesium by microwave heating Pidgeon process " technology disclosed in 200810232855.1, in the technique,
Need after supercooling, milling, shaping to add the dolomite after calcining in electric furnace and smelted.Polluted in smelting process
Seriously, the thermal efficiency is low, and labor intensity is big.
The patent No. is " electric furnace hot charge siliconthermic reduction vacuum magnesium-smelting new process " technology disclosed in 95100495.6, the skill
The a whole set of smelting procedure of art is discontinuous drawing magnesium, that is, blowing out is needed when changing electrode, reduction magnesium is solid-state.
Most of manufacturers of China sustain losses in business because Smelting magnesium produces at present, it has to stop production.What France and the U.S. used
It is more advanced production technology that semicontinuous electric furnace synthesis by internal resistance electric melting process for smelting magnesium is relative, and single stove production capacity is high, and mechanization degree is high, dust
And pernicious gas pollution is few, the blowing out to be interrupted when replacing electrode slags tap magnesium, so being semi-continuous process, rather than connect completely
Continuous metaplasia production.
The content of the invention
For change China's magnesium metal smelting industry generally use highly energy-consuming, high pollution, high cost, automatic and mechanical journey
Spend backwardness production technology low, that labor intensity is high（That is Pidgeon process）, it is of the invention that the continuous of all smelting procedures not blowing out is provided
The new process of method electric furnace smelting magnesium metal.
Technical scheme：
The new process of continuity method electric furnace smelting magnesium metal, go out magnesium it is characterized in that being fed to from belt material-feeding machine and connecing magnesium pot
A whole set of Steelmaking not blowing out vacuum be carried out continuously, the magnesium that crystallizer cools down out is liquid magnesium, conveying worm
Slag tap link, knot magnesium pot of charging link, forehearth goes out magnesium link not vacuum breaker and not blowing out.
The a whole set of Steelmaking includes belt material-feeding machine charging, calcining, insulation batch can is fed, conveying worm adds
Material, smelt, forehearth is slagged tap, crystallizer cools down, ties magnesium pot goes out magnesium, connects magnesium pot goes out magnesium process procedure.
Calcining uses calcined by rotary kiln, and calcined by rotary kiln dolomite drop temperature is 900 DEG C, particle diameter is 10 ~ 20mm；Smelt
Using electric furnace vacuum metling, electric furnace vacuum metling temperature is 1550 ~ 1600 DEG C；
Belt material-feeding machine uses high angle belt conveyer conveyer.
The process equipment of continuity method electric furnace smelting magnesium metal includes furnace charge high angle belt conveyer conveyer, material preheater, returned
Rotary kiln, moving thermal insulation batch can, fixed insulation batch can, conveying worm, microwave hot plate, crystallizer, knot magnesium pot, vacuum suction
Pump, connect magnesium pot.
Material preheater connects rotary kiln, the delivery outlet connection moving thermal insulation batch can of rotary kiln；Moving thermal insulation batch can passes through
Valve, which is connected, is incubated batch can；It is conveying worm below fixed insulation batch can, conveying worm connects microwave electric furnace；Microwave
Electric furnace connects crystallizer, crystallizer connection knot magnesium pot；
Tie magnesium pot and connect setting vacuum suction pump between magnesium pot；
The process equipment of continuity method electric furnace smelting magnesium metal is further equipped with potassium sodium separator, deduster, water ring vacuum pump；Potassium
Sodium separator connects deduster, deduster connection water ring vacuum pump.
Beneficial effects of the present invention：
1st, the white temperature of forging come out using dolime is up to 900 DEG C or so, and prior art is transferred to down after cooling down
One procedure, it is impossible to continuous production；The present invention reaches continuous molten charge using double-deck feed pot, can save 30% or so heat energy,
Serialization automated production degree is improved, ensures consecutive production.
2nd, the magnesium metal restored at a high temperature of 1550 DEG C ~ 1600 DEG C, by furnace roof passageway, liquid is formed under crystallizer
State magnesium is down in knot magnesium pot, is retracted to and is connect in magnesium pot by electrodynamic pump, is transported to refining plant refining magnesium ingot.
3rd, the crude magnesium liquid of knot magnesium pot is transported to refining plant and poured into vacuum refining electric furnace using vacuum distillation refining magnesium ingot, refining
Go out 99.95% one-level magnesium.Overall process can realize mechanization and main production section realizes Automated condtrol, all round process thing
Material does not land, and reduces manpower consumption, improves production efficiency, can thoroughly remove dust pollution, improves environment.
4th, powered electric furnace smelting using microwave, silicothermic reduction is carried out under vacuum condition and produces magnesium metal；Due to using microwave
Power supply mode, eliminate and change electrode process, avoid and change time and interruption production that electrode causes blowing out, while saving is big
Graphite electrode consumption is measured, reduces cost, the continuous production for being advantageous to electric furnace further increases production efficiency.
In summary, production cost of the present invention is no more than 10,000 yuan of yuan/ton of magnesium；And current production of magnesium by pidgeonprocess cost is minimum
Unit be 13500 yuan/ton of magnesium, so the present invention there is higher market survival ability and the market competitiveness.
Brief description of the drawings
Fig. 1 is the technological equipment schematic diagram of the present invention.
Fig. 2 is the process chart of the present invention.
In figure, 1, belt material-feeding machine, 2, preheater, 3, rotary kiln, 4, moving thermal insulation batch can, 5, ferrosilicon feeding system, 6,
Rectifier transformer, 7, microwave treater, 8, potassium sodium separator, 9, ferrosilicon tank material, 10, deduster, 11, water ring vacuum pump, 12, electricity
Flatcar, 13, connect magnesium pot, 14, vacuum suction pump, 15, knot magnesium pot, 16, microwave electric furnace, 17, slagging forehearth, 18, conveying worm,
19th, fixed insulation batch can, 20, heat-resisting flashboard valve.
Embodiment
Shown in Fig. 1, the process equipment of continuity method smelting magnesium includes material preheater 2, rotary kiln 3, moving thermal insulation material
Tank 4, fixed insulation batch can 19, conveying worm 18, microwave electric furnace 16, crystallizer, knot magnesium pot 13, vacuum suction pump 14, connect magnesium
Pot 15；Connected between moving thermal insulation batch can 4 and fixed insulation batch can 19 by heat-resisting flashboard valve 20；Under fixed insulation batch can 19
Face sets conveying worm 18, and conveying worm 18 connects microwave electric furnace 16, and microwave electric furnace 16 passes through furnace roof passageway and crystallizer
Connect, potassium sodium separator 8 is connected above crystallizer, potassium sodium separator 8 connects deduster 10；Connection knot magnesium below crystallizer
Pot 13, the lower section of knot magnesium pot 13, which is set, connects magnesium pot 15, connects magnesium pot 15 and is arranged on electric flatcar 12.
Preheater 2 is the affiliated facility of rotary kiln 3；
One side of microwave electric furnace 16 connects slagging forehearth 17 by passageway；There is a block wall inner chamber of slagging forehearth 17,
Slagging forehearth 17 is separated out two slag chambers by partition wall；The height of partition wall is higher than the outlet in passageway.Before partition wall and slagging between furnace roof
There is space, the space flows into another slag chamber for liquid slag from a slag chamber.The effect of partition wall is to make to enter slagging forehearth
17 liquid slag slag position is higher than the slag notch of microwave electric furnace 16, prevents vacuum breaker.
The art production process of the present invention：
The a whole set of smelting procedure comprises the steps：
（1）, raw material（Dolomite and bauxite）Conveyed according to conventional proportions by belt material-feeding machine and pass through preheater entrance
In rotary kiln；The particle diameter of dolomite is 10 ~ 25mm；The particle diameter of bauxite is 5 ~ 20mm；
（2）, raw material after calcined by rotary kiln, the calcining heat of dolomite is 1280 ~ 1300 DEG C, and dolime goes out
Material temperature degree is 850 ~ 900 DEG C, particle diameter is 10 ~ 20mm；Dolime（Referred to as forge white）Into a moving thermal insulation batch can；Together
When, ferrosilicon material is placed in another moving thermal insulation batch can by ferrosilicon feeding system；
（3）, respectively will be arranged on equipped with white moving thermal insulation batch can is forged above fixed insulation batch can and with sealed connection
Flange is connected with valve, the moving thermal insulation batch can equipped with ferrosilicon is arranged on above fixed insulation batch can and with sealed connection flange
Connected with heat-resisting flashboard valve；
（4）Two valves are opened to enter the charging in two moving thermal insulation batch cans by two fixed batch cans that are incubated respectively
Screw(-type) feeder；
（5）, screw(-type) feeder 850 ~ 900 DEG C forge is white and ferrosilicon is transported in microwave electric furnace, into microwave electric furnace
It is 500 ~ 600 DEG C to forge white temperature, forges the vacuum metling that white and ferrosilicon passes through 1550 ~ 1600 DEG C in microwave electric furnace, passes through silicon heat
Magnesium steam is restored under reducing process vacuum state；The microwave frequency of microwave electric furnace is 1000 ~ 2500 megahertzs, passes through silicothermic process
Magnesium steam is restored under vacuum state；The silicothermic reduction reaction equation of smelting is in microwave electric furnace under vacuum state
;
Magnesium steam is entered in crystallizer by furnace roof passageway；Continuous charging not blowing out, not vacuum breaker；
（6）, magnesium steam be cooled in a crystallizer liquid magnesium enter knot magnesium pot；The liquid magnesium of knot magnesium pot passes through vacuum suction
Pumping, which enters, is placed on connecing in magnesium pot on electric flatcar；Go out magnesium not blowing out, not vacuum breaker；
At the same time, tail gas is pumped into potassium sodium separator by vacuum, and potassium sodium separator is by sodium and potassium crystallization in inner cylinder
In, the tail gas with dust enters deduster；Deduster stays in most of dust in deduster, and the tail gas periodically discharged passes through again
Water-ring vacuum pumped；
(7) liquid magnesium, connect in magnesium pot is transported to refining plant by electric flatcar.
(8), liquid slag enters forehearth by passageway；By caused slag potential difference between electric furnace and forehearth passageway, reach
Stove interior sealing, not vacuum breaker continuously slag tap, not blowing out of slagging tap.
The present invention smelts knot magnesium pot liquid from raw material calcined by rotary kiln, insulation batch can high temperature continuous charging, the heating of electric furnace microwave
It is the whole consecutive production not landed that state, which continuously goes out magnesium, refines ingot casting production technology to cross material,.
Insulation batch can is upper and lower double-deck batch can（That is moving thermal insulation batch can and fixed insulation batch can）, moving thermal insulation batch can and
There is valve among fixed insulation batch can, accomplish tank not blowing out guarantee not blowing out continuous production of reloading；Slag tap to use and be connected with electric furnace
The method of vacuum sealing forehearth continuously slag tap, ensure not blowing out continuous production.
The present invention in high temperature reduction magnesium metal, the reduction ratio of magnesium more thoroughly, in residue MgO content just than relatively low, this
The clinker that sample can is treated as in manufacture of cement uses.High temperature furnace slag is liquid, it is possible to which the grain slag in image height stove is the same
Water Quenching is carried out, is turned waste into wealth, is used for cement plant, thoroughly solves pollution problem of the clinker to environment, while ton magnesium reclaims
6 tons of slag calculates 20 yuan per ton, and ton magnesium cost can reduce by 120 yuan or so.
The present invention can be saved significantly：7150 degree of ton magnesium power consumption, than the Ma Li in the state-of-the-art French U.S. in the world at present
11500 degree of nanofarad ton magnesium power consumption, reduces 40%.Present invention CO compared with Pidgeon process2、SO2Discharge can reduce by 80%；Improve production
Efficiency 25%, energy consumption 50% is reduced, reduces production cost 30%, it can be seen that, there is the present invention good economic benefit and society to imitate
Benefit.
Claims (1)
1. the new process of continuity method electric furnace smelting magnesium metal, enter from belt material-feeding machine charging, calcined by rotary kiln, insulation batch can
Material, conveying worm charging, microwave electric furnace smelting, forehearth are slagged tap, crystallizer cools down, tie magnesium pot goes out magnesium, connect magnesium pot goes out magnesium, a whole set of
Steelmaking is that not blowing out is carried out continuously, and the magnesium that crystallizer cools down out is liquid magnesium, conveying worm charging link, forehearth
Slag tap link, knot magnesium pot goes out magnesium link not vacuum breaker；It is characterized in that a whole set of smelting process comprises the steps：
（1）, raw material conveys by belt material-feeding machine according to conventional proportions and passes through preheater into rotary kiln；
（2）, raw material pass through calcined by rotary kiln, dolime temperature is 1280 ~ 1300 DEG C, and the drop temperature of dolime is
850 ~ 900 DEG C, particle diameter be 10 ~ 20mm；Dolime enters a moving thermal insulation batch can；Meanwhile ferrosilicon feeding system is by silicon
Iron charge is placed in another moving thermal insulation batch can；
（3）, open two valves the dispensing in two moving thermal insulation batch cans entered into screw(-type) feeder by fixed insulation batch can；
（4）, screw(-type) feeder dispensing is transported to microwave electric furnace with microwave heating, the microwave frequency of microwave electric furnace is
1000 ~ 2500 megahertzs, dispensing passes through 1550 ~ 1600 DEG C of vacuum metling in electric furnace, by under silicothermic process vacuum state
Restore magnesium steam；Magnesium steam is entered in crystallizer by furnace roof passageway；The silicon heat smelted under vacuum state in microwave electric furnace
Reduction reaction formula is
；
（5）, magnesium steam be cooled in a crystallizer liquid magnesium enter knot magnesium pot；Liquid magnesium in knot magnesium pot passes through vacuum suction pump
Suction is placed on connecing in magnesium pot on electric flatcar, and vacuum state goes out magnesium not blowing out；At the same time, tail gas is pumped into potassium by vacuum
In sodium separator, for potassium sodium separator by sodium and potassium crystallization in the inner cylinder of potassium sodium separator, the tail gas with dust enters deduster；
Deduster stays in most of dust in deduster, and the tail gas periodically discharged passes through Water-ring vacuum pumped again；
(6), connect the liquid magnesium in magnesium pot and transported by electric flatcar to refining plant and carry out refining ingot casting；
(7), liquid slag enters forehearth by passageway；By caused slag potential difference between microwave electric furnace and forehearth passageway, reach
Stove interior sealing, not vacuum breaker continuously slag tap.
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| CN201510749995.6A CN105420516B (en) | 2015-11-09 | 2015-11-09 | The new process of continuity method electric furnace smelting magnesium metal |
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| CN201510749995.6A CN105420516B (en) | 2015-11-09 | 2015-11-09 | The new process of continuity method electric furnace smelting magnesium metal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106282605A (en) * | 2016-09-14 | 2017-01-04 | 李华梅 | Magnesium oxide produces magnesium metal with carbon with vacuum microwave heating |
| CN106756107A (en) * | 2016-12-27 | 2017-05-31 | 深圳市中启新材料有限公司 | A kind of vacuum microwave magnesium smelting device |
| CN107739848A (en) * | 2017-10-19 | 2018-02-27 | 山西恒天镁业有限公司 | The Application way of magnesium condensation heat during a kind of production of magnesium by pidgeonprocess |
| CN114318011A (en) * | 2022-01-25 | 2022-04-12 | 郭建文 | Metal magnesium smelting device and process by full-continuous thermal reduction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376928A (en) * | 2008-10-10 | 2009-03-04 | 重庆高岭投资（集团）有限公司 | Process for smelting magnesium by microwave heating Pidgeon process |
| CN101892395A (en) * | 2010-06-12 | 2010-11-24 | 安泰科技股份有限公司 | Method for smelting magnesium by decomposition in vacuum through microwaves |
| CN103862060A (en) * | 2014-03-25 | 2014-06-18 | 张培杰 | Device and method for preparing magnesium powder |
| CN104120282A (en) * | 2014-07-21 | 2014-10-29 | 东北大学 | Method for smelting magnesium quickly and continuously |
| CN204594220U (en) * | 2015-02-10 | 2015-08-26 | 苏杭 | Magnesium metal smelting microwave reduction stove |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101501653B1 (en) * | 2013-06-17 | 2015-03-12 | 재단법인 포항산업과학연구원 | Continuous Mg refining apparatus by vacuum reduction method |
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- 2015-11-09 CN CN201510749995.6A patent/CN105420516B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376928A (en) * | 2008-10-10 | 2009-03-04 | 重庆高岭投资（集团）有限公司 | Process for smelting magnesium by microwave heating Pidgeon process |
| CN101892395A (en) * | 2010-06-12 | 2010-11-24 | 安泰科技股份有限公司 | Method for smelting magnesium by decomposition in vacuum through microwaves |
| CN103862060A (en) * | 2014-03-25 | 2014-06-18 | 张培杰 | Device and method for preparing magnesium powder |
| CN104120282A (en) * | 2014-07-21 | 2014-10-29 | 东北大学 | Method for smelting magnesium quickly and continuously |
| CN204594220U (en) * | 2015-02-10 | 2015-08-26 | 苏杭 | Magnesium metal smelting microwave reduction stove |
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