CN104482764B - Combined type protection smelting furnace and smelting process - Google Patents
Combined type protection smelting furnace and smelting process Download PDFInfo
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Abstract
Combined type protection smelting furnace and smelting process.Heated by interchange and spray into being made up of the large body of heater of ore, the little body of heater be communicated with large body of heater and water gas system of water-gas.Water gas system has water gas generator, clarifier, cooler, booster pump.Water-gas after supercharging is passed into rectangle endless tube and the vertical jet pipe of Duo Gen above large body of heater, spray in ore in smelting.In water-gas-Gold in Ores to be belonged to Reduction of Oxide be metal for carbonoxide, hydrogen, greatly improves metal recovery rate.In water-gas, Elliptical gas shield reducing metal is not decomposed, and discharging kish in tail gas after making smelting is zero, not contaminated air.In waste residue, tenor greatly reduces, and meets the requirement of building materials environmental protection.Little body of heater can increase slag liquid metal deposition space and time, promotes that metal recovery rate improves.Smelting process is carried out continuously automatically, the smelting of stove one stove be constantly elevated with existing ac electrode and discharge ratio, save electric energy about 15%, and efficiency improves greatly.Can be used for the various metal such as copper smelting from ore.
Description
(1) technical field: combined type protection smelting furnace of the present invention and smelting process, relate to a kind of smelting furnace of metal smelting from ore.Belong to versatible furnace class (F27D).
(2) background technology:
Existing smelting furnace and smelting process, be shown in Fig. 9, and smelting furnace is by body of heater 1n, slag-drip opening 1.3n, metal notch 1.1n, ac electrode 3n, AC distribution device 4n and exchange lowering or hoisting gear 5n etc. and form.Smelting process has the following step: in body of heater, 1. throw the 0.15-0.25 that solid material volume V reaches total measurement (volume), ac electrode 3n declines and inserts in solid material 6 by elevating mechanism, switch on power, ac electrode electrified regulation solid material, until temperature and electric current reach normal value; 2. continue reinforcing body raw material from the top down and extremely arrive body of heater 1n top; Bottom solid material heating becomes liquid, during heating, liquid level 1.2n moves, and ac electrode 3n rises simultaneously, until liquid level rises to furnace roof, is liquid in whole body of heater; 3. open slag-drip opening 1.3n, discharge the first stove slag; 4. repeat above-mentioned steps 2.-3. once, just complete smelting second stove, the mat woven of fine bamboo strips three stove ...., 5. as stated above, after smelting many stoves, open metal notch 1.1n just now, release the liquid metals of smelting in the lump.There are the following problems for above-mentioned traditional smelting furnace and smelting process: 1. smelt the metal recovery rate low, do not reach national standard.Overrun metal content in the slag of discharging after 2. smelting, generally exceeds standard and reaches more than 0.3%.Slag is generally silicon and calcium, is liquid, becomes solid later when starting to get rid of, and can be supplied to cement plant etc. and make construction material (pulverizing of controlling oneself), and in building materials, overrun metal content produces secondary pollution, is detrimental to health.3. in smelting process, liquid level 1.2n is when furnace bottom, and solid material layer depth, has sealing function, and stove outer air does not enter, and belongs to the normal smelting that few air enters; But due to after smelting one stove, ac electrode and liquid level need to rise to furnace roof always, that is solid material ore layer height h6n very little (see Fig. 9) the liquid level heat zone of ullage is near furnace roof, stove outer air is as easy as rolling off a log enters liquid level heat zone, often refine a stove thus and produce the discharge of a large amount of gas at furnace roof, cause serious environmental pollution.
Chinese invention patent < biphase ore furnace and smelting process > (ZL200910058052.3) disclose-kind of the smelting furnace improved and smelting process, compare metal recovery rate with above-mentioned existing smelting furnace with smelting process to improve, in the waste residue of smelting, tenor reduces; During smelting, mineral hot furnace furnace roof does not produce flue gas; Environmental protection improves.Ac electrode not repetitiousness moves up and down, can the reinforced smelting of Automatic continuous.But because the method that it adopts is the kish be separated with direct current in slag liquid, this only improve only the kish amount in slag liquid, and the oxide that can not be separated completely in raw material and ore and compound, make it to become metal; And the metal produced can not be stoped completely to restore into metal oxide, therefore, want that improving metal recovery rate and environmental protection into-step improves and be also restricted.
(3) summary of the invention:
The combined type protection smelting furnace that the present invention proposes and smelting process, object is entered-is walked to improve existing smelting furnace and smelting process metal recovery rate exactly, reduces the problem such as stove metal in the dreg and environmental protect pollution.
Its technical scheme is as follows:
Combined type protection smelting furnace, comprising: the large in-built solid material ore of body of heater, is inserted with three-phase alternating current pole, bell has charge door and tail gas discharging pipe, have metal notch bottom large body of heater rear wall in stove; And establish AC distribution device and exchange lowering or hoisting gear;
It is characterized in that:
1) in large body of heater, following water-gas spraying system is installed: fix-individual rectangle endless tube along top peripheral direction in large body of heater, on rectangle endless tube uniform fixing be communicated with rectangle endless tube and in large body of heater under spray many vertical jet pipes of power water-gas, rectangle endless tube has press water gas inlet.Water-gas spraying system can be fixed in bell.2) establish following little body of heater: the unlimited casing formed by the little sidewall of the furnace body closed and inclined end face, little body of heater rear wall is fixed on large body of heater front side wall, and two side has consistent oblique connected entrance oblique with inclined end face; Little body of heater front side wall has slag-drip opening, and slag-drip opening height is identical with operating fluid level height in body of heater.3) establish following water gas system at large body of heater and port: establish water gas generator, and connect clarifier, cooler, booster pump with tracheae in turn; Booster pump efferent duct is communicated with press water gas inlet above large body of heater.Described clarifier be purification casing in above fill multiple layer metal screen pack, purification casing below be Chu dirt room, air inlet pipe height and position between metal filter screen and Chu dirt room, escape pipe purifying casing top, Chu dirt has ash-draining gate bottom room; Described cooler is in water tank, be provided with many horizontal tracheaes, fills cold water and upper and lower opens cooling water inlet, hot water outlet respectively in water tank.Slag-drip opening on above-mentioned little body of heater front side wall, can adopt and block one section along short transverse refractory material, and blocking mouth position changes by liquid surface lifting, forms movable rows cinder notch.
Adopt the smelting process of combinations thereof formula protection smelting furnace, it is characterized in that the method comprises the following steps:
1) described combined type protection smelting furnace is made.Water-gas spraying system is installed above in large body of heater; And booster pump efferent duct and press water gas inlet are connected.2) oblique connected entrance and metal notch refractory material are blocked.In large body of heater, throw solid material, raw material volume V is the 0.15-0.25 of total measurement (volume); Interchange lowering or hoisting gear starts, and declined by ac electrode and insert in solid material, connect AC distribution installation's power source, ac electrode electrified regulation solid material, until temperature and electric current reach normal value.3) continue to put into solid material from the top down to large body of heater top from bell charge door; In large body of heater, bottom solid material becomes liquid, liquid level gradually on move, when in controller, input current reaches numerical value corresponding with setting operating fluid level height, controller controls to exchange lowering or hoisting gear, ac electrode is made to stop rising, be fixed on height H 3 position, H3 is set as (0.4-0.6) body of heater height overall H1; Liquid level controls at 80-120mm apart from ac electrode base distance h3.4) remove oblique connected entrance place refractory material, oblique connected entrance is communicated with, and in large body of heater, lower liquid flows to little body of heater, after being full of slag liquid, liquid level places thermal-insulating covering agent in little body of heater.5) water gas system is started; vertical jet pipe sprays to solid material and contains-carbonoxide, hydrogen Ji the press water coal gas of Elliptical gas; through reduction, protective reaction; in slag liquid, kish is deposited on large body of heater and little body of heater bottom surface, and the kish of little body of heater bottom surface also passes back into furnace bottom in large body of heater through inclined end face, tiltedly connected entrance.6) liquid level rises to slag-drip opening position, continuous overflow dreg discharging liquid; Now solid material volume declines, and supplements at any time simultaneously and fills solid material; 1-2 hour after opening by water gas system, opens metal notch, and metal is discharged.
Beneficial effect of the present invention:
1) due to water-gas by fill in water gas generator coal sealing Stove with water-gas generation body in pass into steam and produce, so main component is in water-gas: (H2) Yi is Ji Elliptical gas for-carbonoxide (CO), hydrogen.Water-gas is passed in large body of heater, has reduction and defencive function.Because the metal oxide back in ore in large body of heater and raw material can be elemental metals by-carbonoxide (CO) and hydrogen (H2), promote the raising greatly of metal recovery rate.And Elliptical gas does not decompose in large stove endogenous protective reducing metal, in the tail gas that smelting is discharged afterwards, kish is zero, and tail gas is contaminated air not.In waste residue, tenor greatly reduces, and is not more than 0.05%, meets the requirement of building materials environmental protection.2) water-gas establishing clarifier and cooler to ensure that water gas generator exports enters booster pump after obtaining purification and cooling again, meets the requirement of booster pump condition of work.3) establish little body of heater, make slag liquid have larger room and time plated metal, also promote the raising of metal recovery rate.4) in smelting, operating position liquid surface heat zone (i.e. ac electrode and liquid level position) is in the middle part of body of heater all the time, under the sealing of solid material layer, stove outer air inlet is few, remain the normal smelting state of a small amount of air, during smelting, smelting furnace furnace roof smokeless is discharged, and greatly improves and smelts environmental pollution.5) because little body of heater slag-drip opening is identical with liquid level height, slag emission and large body of heater raffinate stream all can carry out by Automatic continuous to little body of heater, and then adding of solid material also can automatic or manual adds continuously by the decline of raw material aspect.Simultaneously owing to establishing inclined end face and oblique connected entrance, discharge continuously the while that in little body of heater, kish can sinking to metal smelting in large bottom of furnace body and large body of heater continuously.Whole smelting process is carried out continuously automatically thus, and during work, ac electrode maintains static, and when smelting with existing smelting furnace, ac electrode repetitiousness is elevated, and the smelting of stove one stove is compared with the smelting process of discharge, and heat is incubated, and furnace temperature is stablized; Decrease surface and melt the power consumption heated up, electric energy about about 15% can be saved, and efficiency improves greatly.7) Automatic continuous deslagging, is conducive to the recovery of various Nonferrous Metals Smelting Slags.8) when establishing movable rows cinder notch can adapt to liquid fluctuating, the convenient of slag-drip opening position regulates, during with satisfied smelting different metal kind and content, and the adjustment of liquid level.
(4) accompanying drawing illustrates:
Fig. 1 combined type protection smelting furnace overall structural arrangement and block diagram representation.
Fig. 2 Fig. 1 K direction view, i.e. water-gas spraying system 7 top view in top in large body of heater.
Fig. 3 clarifier 10 structural representation.
Fig. 4 cooler 9 structural representation.
Fig. 5 AC distribution device 4 block diagram.
Fig. 6 Fig. 4 B-B sectional view (only draw an ac electrode A and be electrically connected diagram).
Fig. 7 exchanges lowering or hoisting gear 5 schematic diagram (only draw an ac electrode 3A lowering or hoisting gear, it is identical in the lowering or hoisting gear of two, and is independently).
Fig. 8 Fig. 7 C-C analyses and observe.
The existing smelting furnace general layout of Fig. 9 and structural representation
(5) detailed description of the invention:
See Fig. 1, combined type protection smelting furnace is heated by ac electrode and sprays into the large body of heater 1 of press water coal gas, the little body of heater 2 be communicated with large body of heater and water gas system 8-11 and forms.
See Fig. 1, large body of heater 1 inwall is the furnace lining that refractory material makes; Outer tubaeform metal notch 1.1 is had bottom rear wall.During work, large body of heater is built with solid material ore 6; Three-phase alternating current electrode 3 (3A, 3B, 3C) inserts in ore, and general employing three exchanges carbon poles.And establish AC distribution device 4 and exchange lowering or hoisting gear 5.Below bottom of furnace body, ground is embedded with the insulation heat preservation layer 12 made of refractory brick.
See Fig. 1, see Fig. 2 have bell 1.6 above large body of heater 1, bell end face has charge door 1.7 and tail gas discharging pipe 1.8.Fix-individual rectangle endless tube 7.1 along bell inwall 1.61 peripheral direction, on rectangle endless tube uniform fixing be communicated with rectangle endless tube and in large body of heater under spray many vertical jet pipes 7.2 of power water-gas, rectangle endless tube has press water gas inlet 7.3.See Fig. 2, adjacent two vertical jet pipe 7.2 spacing b7=200mm.Form water-gas spraying system 7 thus.
See Fig. 1, if following little body of heater 2: the unlimited casing formed by the little sidewall of the furnace body closed and inclined end face 2.4, little body of heater rear wall 2.3 is fixed on large body of heater front side wall 1.3, and two side has consistent oblique connected entrance 1.4 (one section gradient select 1:9 be good) oblique with inclined end face.General oblique connected entrance 1.4 is the 0.3-0.35 of large body of heater height overall H1 apart from the height h1.4 of large body of heater bottom surface.Little body of heater front side wall 2.2 has outer tubaeform slag-drip opening 2.1, the rectangular opening long limit refractory material of little body of heater front side wall 2.2 short transverse can be adopted to block one section, and the movable rows cinder notch 2.1 that blocking mouth position can change with liquid surface lifting and be formed.Slag-drip opening height h2.1 is identical with operating fluid level height h1.2 in large body of heater.Little base of furnace body 2.5 refractory material makes, and can adopt the unsplit bedplate 2.5 being put in ground 13.
See Fig. 1, at large body of heater with port is external arranges water-gas feed system 8-11: establish water gas generator 11, water gas generator efferent duct connects clarifier 10, cooler 9, booster pump 8 with tracheae in turn; Booster pump efferent duct 8a is communicated with press water gas inlet 7.3 above large body of heater.
Water gas generator 11 is included in the Stove with water-gas generation body that fills coal and the steam pipe passing into steam to Stove with water-gas generation body and the efferent duct of being drawn by the water-gas produced is housed.Huo Sai Shi Heng wet body booster pump selected by booster pump 8.Because this two pieces is commercially available prod, so no longer describe in detail here.
See Fig. 3, clarifier 10 is by impurity, dust removing in water-gas.Following composition: in purification casing 10.1, top dress multiple layer metal screen pack 10.2, below is Chu dirt room 10.4, and air inlet pipe 10.3 height and position is between metal filter screen and Chu dirt room, escape pipe 10.6 is located at purification casing top, and Chu dirt has ash-draining gate 10.5 bottom room.See Fig. 1, see Fig. 3, the water-gas of impurity, dust that has produced when water gas generator enters in purification casing 10.1 through air inlet pipe 10.3, through multiple layer metal screen pack 10.2, discharges coal gas of purifying waste water from bottom to up, and then pass into cooler 9 by escape pipe 10.6.Impurity, dust drop to Chu dirt room 10.4, regularly open ash-draining gate 10.5 ash discharge.
See Fig. 4, water-gas after purification is cooled to normal temperature by cooler.Cooler 9 forms as follows: establish the water tank 9.1 filling cold water, and water tank upper and lower leaves cooling water inlet 9.2, hot water outlet 9.5 respectively.Many horizontal tracheaes 9.6 are provided with in water tank; Horizontal tracheae two ends are communicated with front plenum chamber 9.7 and rear plenum chamber 9.3 respectively, and front plenum chamber is equipped with air inlet pipe 9.8, and rear plenum chamber is equipped with escape pipe 9.4.When purifying waste water, coal gas enters front plenum chamber 9.7 from air inlet pipe 9.8, what make it equal Uniform enters many horizontal tracheaes 9.6, plenum chamber 9.3 after coal gas of purifying waste water after many horizontal tracheaes are cooled by cold water in water tank enters, and by escape pipe 9.4, the water-gas of purification cooling is entered booster pump 8.The cold water of water tank 9.1-as be normal temperature, pass into from cooling water inlet 9.2, hot water less than about 70 DEG C, is discharged by hot water outlet 9.5.
See Fig. 1, purification, cooling, water-gas after supercharging send into rectangle endless tube 7.1 above large body of heater through booster pump efferent duct 8a, press water gas inlet 7.3, many vertical jet pipes 7.2 spray to ore in large body of heater when smelting.
See Fig. 5, Fig. 6, AC distribution device 4 forms as follows: the wiring cabinet 4.1 1. establishing Nei Youzhujiong road power supply, switch etc.; The controller 4.2 and the voltage that control temperature and ac electrode lifting etc. in alternating voltage, electric current, body of heater reduce to the low-tension transformer 4.3 of 75 ~ 120V by 380V.2. low-tension transformer low-pressure side draws three cords 4.3A, 4.3B, 4.3C, its end fills metal anchor ear 4.4 respectively, and bind round respectively outside three ac electrodes 3A, 3B, 3C, low-voltage AC is transmitted on electrode, based on the scalability of cord, ac electrode is exchanging under lowering or hoisting gear 5 drives can freely move up and down with metal anchor ear.3. ac electrode cross section is circular, arranges can be overlook leg-of-mutton three vertex positions in space.
See Fig. 7 and Fig. 8, exchange lowering or hoisting gear 5 to form as follows: 1. three ac electrodes 3A, 3B, 3C respectively establish a lowering or hoisting gear, a transverse arm 5.3 is established in every platform, article one, ac electrode 3A is through transverse arm place, there is the clamping head 5.5 of clamping electrode this transverse arm termination, place, clamping head opening part establishes bolt 5.6 to tighten up, and has insulation tube 5.4 between clamping head 5.5 and electrode.Transverse arm the inner has sliding sleeve 5.3a to be placed on outside the column 5.2 of fixed bottom boundary, coordinates, can fill slip or rolling bearing between sliding sleeve 5.3a and column 5.2 for sliding or rolling.2. worm gear speed change lowering or hoisting gear 5.1 is installed on column 5.2, and the worm screw 5.1a in this worm gear speed change lowering or hoisting gear 5.1 is fixed on transverse arm 5.3.Because transverse arm outer end can move up and down on column, thus after the electric motor starting of worm gear speed change lowering or hoisting gear 5.1, drive worm gear wheel and worm screw 5.1a to move up and down and drive the transverse arm 5.3, ac electrode 3A, insulation tube 5.4 etc. of one to be freely elevated.Insulation tube 5.4 is by ac electrode and transverse arm electric insulation.
The smelting process of combinations thereof formula protection smelting furnace metal smelting, the method comprises the following steps:
1) see Fig. 1-Fig. 8, make combinations thereof formula protection smelting furnace.See Fig. 1-Fig. 2, water-gas spraying system 7 is installed above in large body of heater, and booster pump efferent duct 8a and press water gas inlet 7.3 are connected.
2) see Fig. 1, oblique connected entrance 1.4 and metal notch 1.1 refractory material 1.5 are blocked; In body of heater 1, throw solid material, raw material volume V is the 0.15-0.25 of total measurement (volume), optional 0.2; Exchange lowering or hoisting gear 5 to start, declined by ac electrode 3 and insert in solid material, connect AC distribution device 4 power supply, ac electrode electrified regulation solid material, until temperature and electric current reach normal value.
3) seeing Fig. 1, continuing to put into solid material from the top down to arriving body of heater top; In large body of heater, bottom solid material becomes liquid, liquid level gradually on move, when in controller 4.2, input current reaches numerical value corresponding with setting operating fluid level height, controller controls to exchange lowering or hoisting gear 5, ac electrode is made to stop rising, be fixed on height H 3 position, H3 is set as (0.4-0.6) body of heater height overall H1; Can be controlled in 0.5H1 herein, now liquid level can be controlled in 80-120mm scope apart from the distance h3 on ac electrode base, can be taken as 100mm; When then working, liquid level 1.2 height h1.2 can be controlled in 0.5H1+100mm.
4) see Fig. 1, remove oblique connected entrance place refractory material 1.5, oblique connected entrance is communicated with, and in large body of heater, lower liquid flows to little body of heater, makes the abundant sedimentation of slag liquid.After being full of slag liquid in little body of heater, liquid level being placed thermal-insulating covering agent 2.6, generally adopts husk, to make liquid insulating and to prevent heat loss.
5) Fig. 1-Fig. 4 is seen; start water gas system 8-11; vertical jet pipe 7.2 sprays to solid material and contains-carbonoxide, hydrogen Ji the press water coal gas of Elliptical gas; through reduction, protective reaction; in slag liquid, kish is deposited on large body of heater and little body of heater bottom surface, and the kish of little body of heater bottom surface also passes back into furnace bottom in large body of heater through inclined end face 2.4, tiltedly connected entrance 1.4.
6) see Fig. 1, liquid level 1.2 rises to slag-drip opening 2.1 position, continuous overflow dreg discharging liquid; Now solid material volume declines, and supplements at any time simultaneously and fills solid material; 1-2 hour after opening by water gas system, opens metal notch 1.1, and metal is discharged.Realize thus automatically smelting continuously.
Claims (3)
1. combined type protection smelting furnace, comprise: the large in-built solid material ore (6) of body of heater (1), three-phase alternating current pole (3) is inserted with in stove, bell (1.6) has charge door (1.7) and tail gas discharging pipe (1.8), bottom large body of heater rear wall, have metal notch (1.1); And establish AC distribution device (4) and exchange lowering or hoisting gear (5);
It is characterized in that:
1) in large body of heater, following water-gas spraying system (7) is installed: fix-individual rectangle endless tube (7.1) along top peripheral direction in large body of heater, on rectangle endless tube uniform fixing be communicated with rectangle endless tube and in large body of heater under spray many vertical jet pipes (7.2) of power water-gas, rectangle endless tube has press water gas inlet (7.3);
2) following little body of heater (2) is established: the unlimited casing formed by the little sidewall of the furnace body closed and inclined end face (2.4), little body of heater rear wall (2.3) is fixed on large body of heater front side wall (1.3), and two side has consistent oblique connected entrance (1.4) oblique with inclined end face; Little body of heater front side wall (2.2) has slag-drip opening (2.1), and slag-drip opening height (h2.1) is identical with operating fluid level height (h1.2) in large and small body of heater;
3) at large body of heater with port is external establishes following water gas system: establish water gas generator (11), and connect clarifier (10), cooler (9), booster pump (8) with tracheae in turn; Booster pump efferent duct is communicated with press water gas inlet above large body of heater; Described clarifier be purification casing in above fill multiple layer metal screen pack, purification casing below be Chu dirt room, air inlet pipe height and position between metal filter screen and Chu dirt room, escape pipe open purifying casing top, Chu dirt has ash-draining gate bottom room; Described cooler is in water tank, be provided with many horizontal tracheaes, fills cold water and upper and lower opens cooling water inlet, hot water outlet respectively in water tank; Horizontal tracheae two ends are communicated with front plenum chamber and rear plenum chamber that air inlet pipe and escape pipe are housed respectively.
2., by combined type protection smelting furnace described in claim 1, it is characterized in that the slag-drip opening (2.1) on described little body of heater front side wall, adopt and block one section along short transverse refractory material, blocking mouth position changes by liquid surface lifting, forms movable rows cinder notch.
3. adopt the smelting process of combined type protection smelting furnace described in claim 1 or 2, it is characterized in that the method comprises the following steps:
1) combined type protection smelting furnace described in claim 1 or 2 is made; Water-gas spraying system is installed above in large body of heater; And booster pump efferent duct (8a) is communicated with press water gas inlet (7.3);
2) oblique connected entrance (1.4) and metal notch (1.1) refractory material (1.5) are blocked; In large body of heater, throw solid material, raw material volume V is the 0.15-0.25 of total measurement (volume); Exchange lowering or hoisting gear (5) to start, declined by three-phase alternating current electrode (3) and insert in solid material, connect AC distribution installation's power source, ac electrode electrified regulation solid material, until temperature and electric current reach normal value;
3) continue to put into solid material from the top down extremely to large body of heater top from bell charge door (1.7); In large body of heater, bottom solid material becomes liquid, liquid level gradually on move, when controller (4.2) interior input current reaches numerical value corresponding with setting operating fluid level height, controller controls to exchange lowering or hoisting gear, ac electrode is made to stop rising, be fixed on height (H3) position, (H3) is set as (0.4-0.6) body of heater height overall (H1); Liquid level controls at 80-120mm apart from ac electrode base distance (h3);
4) remove oblique connected entrance place refractory material, oblique connected entrance is communicated with, and in large body of heater, lower liquid flows to little body of heater, after being full of slag liquid, liquid level is placed thermal-insulating covering agent (2.6) in little body of heater;
5) water gas system is started, vertical jet pipe (7.2) sprays to solid material and contains-carbonoxide, hydrogen Ji the press water coal gas of Elliptical gas, through reduction, protective reaction, in slag liquid, kish is deposited on large body of heater and little body of heater bottom surface, and the kish of little body of heater bottom surface also passes back into furnace bottom in large body of heater through inclined end face, tiltedly connected entrance;
6) liquid level (1.2) rises to slag-drip opening (2.1) position, continuous overflow dreg discharging liquid; Now solid material volume declines, and supplements at any time simultaneously and fills solid material; 1-2 hour after opening by water gas system, opens metal notch (1.1), and metal is discharged.
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| CN201434601Y (en) * | 2009-01-06 | 2010-03-31 | 向方贵 | Two-phase electric arc furnace |
| CN102703704B (en) * | 2012-06-20 | 2013-09-25 | 柳州市金螺机械有限责任公司 | Method for smelting metal ores |
| CN203083359U (en) * | 2013-01-29 | 2013-07-24 | 孙秉功 | Natural gas heat accumulating type cupola |
| CN203602695U (en) * | 2013-10-31 | 2014-05-21 | 江西瑞林稀贵金属科技有限公司 | Side-blown smelting device |
| CN204535395U (en) * | 2014-12-10 | 2015-08-05 | 向方贵 | Combined type protection smelting furnace |
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