CN101857924A - Tank-free vertical electric smelting metallic magnesium reduction furnace - Google Patents
Tank-free vertical electric smelting metallic magnesium reduction furnace Download PDFInfo
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- CN101857924A CN101857924A CN201010209632A CN201010209632A CN101857924A CN 101857924 A CN101857924 A CN 101857924A CN 201010209632 A CN201010209632 A CN 201010209632A CN 201010209632 A CN201010209632 A CN 201010209632A CN 101857924 A CN101857924 A CN 101857924A
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Abstract
The invention discloses non-ferrous metal smelting equipment, in particular to a tank-free vertical electric smelting metallic magnesium reduction furnace used for smelting metallic magnesium. The upper end of a furnace shell (4) is provided with a crystallizing device; a heat preservation layer (5) and a fire-resistant material (8) are arranged in the furnace shell (4); a central tube (9) is arranged in a hearth; the hearth and the inner wall of a furnace wall built by the fire-resistant material (8) are both provided with strip-shaped heating plates (7); and the bottom of the furnace shell (4) is provided with a furnace bottom end cover (12) and is connected with a hoist cylinder (13) which is placed on a material placing vehicle (14). A smelting method of the reduction furnace comprises the following steps of: calcining metallic magnesium ore at a high temperature; grinding the calcined ore into fine powder; mixing the powder and pressing a mixture into balls; performing vacuum smelting; and crystallizing into solid metallic magnesium. Because of canceling an expensive high-alloy heat-resistant steel reduction tank, the reduction furnace of the invention has the characteristics of high electric smelting heat efficiency, less heat loss, environmental protection, energy conservation, great reduction of carbon dioxide discharge, no environmental pollution, and great improvement on labor intensity and working environment.
Description
Technical field: the present invention relates to non-ferrous metal metallurgy equipment, specifically is a kind of tank-free vertical electric smelting metallic magnesium reduction furnace that smelting magnesium is used.
Background technology: at present, the magnesium metal smelting technology mainly contains two big classes in the world: the one, and electrolytic process refining MAGNESIUM METAL technology, this raw materials technology source is more rare, and reparation technology is complicated, and power consumption is bigger, and the product cost height is not used.The 2nd, the cross pot type thermit reduction also claims Pidgeon process refining MAGNESIUM METAL, and it is raw material that this method adopts the MAGNESIUM METAL ore, and calcining back main component is a magnesium oxide, restores MAGNESIUM METAL with ferrosilicon under high temperature and vacuum state, and MAGNESIUM METAL steam recrystallize is obtained crude magnesium.Spherical reducing material is placed in the airtight high temperature steel reduction jar, is that thermal source adds the thermal reduction MAGNESIUM METAL by coal or coal gas.Pidgeon process refining MAGNESIUM METAL environmental pollution is more serious, staff's work under bad environment, labour intensity is bigger, is unfavorable for that also technological process realizes mechanize, automatization, the rare metal of mass consumption country, Cr accounts for 24～28% in the reduction jar, Ni accounts for 7～9%, owing to limited by a high temperature steel reduction jar heatproof, reduction temperature can not be too high in addition, thereby make reduction rate too slow, greatly reduce the production efficiency of refining MAGNESIUM METAL.
Summary of the invention: the present invention has overcome the drawback of present Pidgeon process and the existence of electrolytic process smelting magnesium, provides labour intensity lower, a kind of tank-free vertical electric smelting metallic magnesium reduction furnace that environmental pollution is less.The technical scheme that technical solution problem of the present invention is adopted is: described furnace shell 4 upper ends are provided with crystallization apparatus, vacuum pipe 1 is arranged on middle part on the crystallization apparatus, and communicate with burner hearth, thermal insulation layer 5, refractory materials 8 devices are in furnace shell 4, pipe core 9 is set in the burner hearth, and and all install banded heating board 7 with the furnace wall inwall that refractory materials 8 is built into, furnace shell 4 bottoms are provided with furnace bottom end socket 12, and be connected with the hoist cylinder 13 on placing blowing car 14, slag bucket 18 is arranged on left end on the blowing car 14, blowing car 14 is parked on the blowing car guide rail 15, and furnace bottom end socket 12 tops are provided with the blowing closing mechanism; Its smelting process is earlier with the high-temperature calcination of MAGNESIUM METAL ore, regrinds into fine powder, mixes, is pressed into pellet, puts into the vertical electric stove then, carries out vacuum metling, crystallizes into solid metal magnesium.
The invention has the beneficial effects as follows: compare with a horizontal jar thermit reduction, cancelled expensive heat-resistant high alloy steel reduction jar.Heating means change vertical electric stove internal heating into by horizontal chamber oven coal or coal gas external heating type.
1, the electrothermal oven heat waste is little, smelts thermo-efficiency up to more than 90%.
2, the electrothermal oven temperature has improved the reduction temperature of MAGNESIUM METAL like this up to 1450 ℃ (electrothermal part is a molybdenum plate shape resistance element), has accelerated the reduction rate of MAGNESIUM METAL, and the recovery time of MAGNESIUM METAL is shortened, and the reduction ratio of MAGNESIUM METAL improves.
3, test shows that the electric energy of electrothermal oven refining MAGNESIUM METAL consumption is few than specific consumption coal, and cost reduces.
4, the vertical electric stove gold metallurgy stove that belongs to magnesium apparatus presents vertical straight barrel type, and the reinforced so disposable mechanized charging of batch can that can adopt fixed volume is saved the reinforced time.Horizontal jar of thermit reduction discharging slag must manually be skimmed under the condition of high temperature, hyperthermia radiation, and labor condition is abominable; The mode of slagging tap of this device has been improved staff's work situation for from flumping slag, has saved charging, has slagged tap the time.
5, discharging, feed in raw material, slagging tap is mechanize, shortened slag tap, reinforced time, improved efficiency.
6, this device adopts electrically heated, has solved the problem of present refining MAGNESIUM METAL industry fume emission completely, has accomplished carbon dioxide zero discharge.
7, each province, China south lacks fat coal, increases high transportation cost and transport the coal in the North to the South, and can't adopt Pidgeon process refining MAGNESIUM METAL.But south is respectively save and is had abundant high-test metal magnesite ore deposit, and competent hydropower resource is also arranged, and this device adopts electric power to smelt, for southern each province MAGNESIUM METAL industry development provides new opportunity.
8, the shortening of this device is slagged tap, is fed in raw material about 20 minutes of time, and the every heat of Pidgeon process refining MAGNESIUM METAL needs 12 hours, and this installs every heat and needs 8 hours, and production efficiency has improved 30%.
Description of drawings: Fig. 1 is a main sectional view of the present invention
Fig. 2 is the vertical view of Fig. 1
Embodiment: embodiment 1: as Fig. 1, shown in Figure 2, described furnace shell 4 upper ends are provided with crystallization apparatus, vacuum pipe 1 is arranged on middle part on the crystallization apparatus, and communicate with burner hearth, thermal insulation layer 5, refractory materials 8 devices are in furnace shell 4, pipe core 9 is set in the burner hearth, and and all install banded heating board 7 with the furnace wall inwall that refractory materials 8 is built into, furnace shell 4 bottoms are provided with furnace bottom end socket 12, and be connected with the hoist cylinder 13 on placing blowing car 14, slag bucket 18 is arranged on left end on the blowing car 14, and blowing car 14 is parked on the blowing car guide rail 15, and furnace bottom end socket 12 tops are provided with the blowing closing mechanism; Its smelting process is earlier with the high-temperature calcination of MAGNESIUM METAL ore, regrinds into fine powder, mixes, is pressed into pellet, puts into the vertical electric stove then, carries out vacuum metling, crystallizes into solid metal magnesium.
Embodiment 2: as shown in Figure 1 and Figure 2, described smelting process is with the high-temperature calcination of MAGNESIUM METAL ore, then MAGNESIUM METAL ore calcination after product is all worn into fine powder and ferrosilicon by the science mixed, and then mixed fine powder is pressed into pellet; Again pellet is put into vertical electric stove burner hearth, start the vertical electric stove, generate heat by heating board, make furnace temperature be raised to 1180 ℃-1220 ℃, start vacuum pump simultaneously, make the interior vacuum tightness of burner hearth reach 3Pa-10Pa, through 7 hours, the MAGNESIUM METAL steam restores gradually, rises in the crystallizer, because the water jacket of crystallizer outside is connected with recirculated water, make the temperature in the crystallizer reduce to 450 ℃-500 ℃, make the MAGNESIUM METAL steam crystallize into solid metal magnesium, after the MAGNESIUM METAL steam crystallization in the crystallizer finished, the crystallizer that will have solid metal magnesium took out; Open the blowing plate of vertical electric stove simultaneously by closing mechanism, utilization furnace bottom hoist cylinder is fallen furnace bottom end socket and mobile blowing car slag is put in the slag bucket on the blowing car, enters next circulation.
Embodiment 3: as shown in Figure 1 and Figure 2, the middle part is provided with temperature measurer 6 on the described furnace shell 4, and passes furnace shell 4 and be built in thermal insulation layer 5, the refractory materials 8, and heating board electrode 10 is arranged on furnace shell 4 lower right side, and is connected with heating board 7.
Embodiment 4: as shown in Figure 1 and Figure 2, blowing connecting rod 17 devices of described closing mechanism are in blowing oil cylinder 16 lower ends, and the one end is fixed on the blowing plate 11 that is arranged on furnace shell 4 bottoms, and the other end links to each other with furnace shell 4.
Embodiment 5: as shown in Figure 1 and Figure 2, the crystallizer 3 of described crystallization apparatus is the metalwork of taper, its outer setting crystallizer water jacket 2, and crystallizer water jacket 2 upper and lower ends are provided with water inlet pipe and rising pipe 19.
Embodiment 6: as shown in Figure 1 and Figure 2, described furnace shell 4 upper/lower terminals are spherical.Furnace bottom end socket 12 liftables move, and make things convenient for blowing.
Claims (6)
1. tank-free vertical electric smelting metallic magnesium reduction furnace, it is characterized in that furnace shell (4) upper end is provided with crystallization apparatus, vacuum pipe (1) is arranged on middle part on the crystallization apparatus, and communicate with burner hearth, thermal insulation layer (5), refractory materials (8) device is in furnace shell (4), pipe core (9) is set in the burner hearth, and and all install banded heating board (7) with the furnace wall inwall that refractory materials (8) is built into, furnace shell (4) bottom is provided with furnace bottom end socket (12), and be connected with the hoist cylinder (13) on placing blowing car (14), slag bucket (18) is arranged on blowing car (14) and goes up left end, blowing car (14) is parked on the blowing car guide rail (15), and furnace bottom end socket (12) top is provided with the blowing closing mechanism; Its smelting process is earlier with the high-temperature calcination of MAGNESIUM METAL ore, regrinds into fine powder, mixes, is pressed into pellet, puts into the vertical electric stove then, carries out vacuum metling, crystallizes into solid metal magnesium.
2. a kind of tank-free vertical electric smelting metallic magnesium reduction furnace according to claim 1, it is characterized in that smelting process is with the high-temperature calcination of MAGNESIUM METAL ore, then MAGNESIUM METAL ore calcination after product is all worn into fine powder, press the science mixed with ferrosilicon, and then mixed fine powder is pressed into pellet; Again pellet is put into vertical electric stove burner hearth, start the vertical electric stove, generate heat by heating board, make furnace temperature be raised to 1180 ℃-1220 ℃, start vacuum pump simultaneously, make the interior vacuum tightness of burner hearth reach 3Pa-10Pa, through 7 hours, the MAGNESIUM METAL steam restores gradually, rises in the crystallizer, because the water jacket of crystallizer outside is connected with recirculated water, make the temperature in the crystallizer reduce to 450 ℃-500 ℃, make the MAGNESIUM METAL steam crystallize into solid metal magnesium, after the MAGNESIUM METAL steam crystallization in the crystallizer finished, the crystallizer that will have solid metal magnesium took out; Open the blowing plate of vertical electric stove simultaneously by closing mechanism, utilization furnace bottom hoist cylinder is fallen furnace bottom end socket and mobile blowing car slag is put in the slag bucket on the blowing car, enters next circulation.
3. a kind of tank-free vertical electric smelting metallic magnesium reduction furnace according to claim 1, it is characterized in that furnace shell (4) is provided with temperature measurer (6) in the middle part of going up, and passing furnace shell (4) is built in thermal insulation layer (5), the refractory materials (8), heating board electrode (10) is arranged on furnace shell (4) lower right side, and is connected with heating board (7).
4. a kind of tank-free vertical electric smelting metallic magnesium reduction furnace according to claim 1, blowing connecting rod (17) device that it is characterized in that closing mechanism is in blowing oil cylinder (16) lower end, the one end is fixed on the blowing plate (11) that is arranged on furnace shell (4) bottom, and the other end links to each other with furnace shell (4).
5. a kind of tank-free vertical electric smelting metallic magnesium reduction furnace according to claim 1, the crystallizer (3) that it is characterized in that crystallization apparatus is the metalwork of taper, its outer setting crystallizer water jacket (2), crystallizer water jacket (2) upper and lower end is provided with water inlet pipe and rising pipe (19).
6. a kind of tank-free vertical electric smelting metallic magnesium reduction furnace according to claim 1 is characterized in that furnace shell (4) upper/lower terminal is for spherical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010209632A CN101857924A (en) | 2010-06-19 | 2010-06-19 | Tank-free vertical electric smelting metallic magnesium reduction furnace |
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| CN201010209632A CN101857924A (en) | 2010-06-19 | 2010-06-19 | Tank-free vertical electric smelting metallic magnesium reduction furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816938A (en) * | 2012-08-22 | 2012-12-12 | 刘海永 | Reducing furnace for smelting magnesium by electrothermal method |
| CN103173635A (en) * | 2013-04-16 | 2013-06-26 | 沈阳化工大学 | Device for joint refining of aluminum-magnesium alloy |
| CN105567969A (en) * | 2015-12-17 | 2016-05-11 | 于洪喜 | Magnesium smelting process with microwave carbon method |
| CN113801998A (en) * | 2021-09-03 | 2021-12-17 | 西安交通大学 | Method and device for continuous reduction of metal magnesium under protection of argon at normal pressure |
-
2010
- 2010-06-19 CN CN201010209632A patent/CN101857924A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816938A (en) * | 2012-08-22 | 2012-12-12 | 刘海永 | Reducing furnace for smelting magnesium by electrothermal method |
| CN103173635A (en) * | 2013-04-16 | 2013-06-26 | 沈阳化工大学 | Device for joint refining of aluminum-magnesium alloy |
| CN103173635B (en) * | 2013-04-16 | 2014-04-09 | 沈阳化工大学 | Device for joint refining of aluminum-magnesium alloy |
| CN105567969A (en) * | 2015-12-17 | 2016-05-11 | 于洪喜 | Magnesium smelting process with microwave carbon method |
| CN113801998A (en) * | 2021-09-03 | 2021-12-17 | 西安交通大学 | Method and device for continuous reduction of metal magnesium under protection of argon at normal pressure |
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Application publication date: 20101013 |