CN103451430A - Oxygen-enriched smelting furnace for treating low-grade multi-metal material - Google Patents
Oxygen-enriched smelting furnace for treating low-grade multi-metal material Download PDFInfo
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- CN103451430A CN103451430A CN2013103555657A CN201310355565A CN103451430A CN 103451430 A CN103451430 A CN 103451430A CN 2013103555657 A CN2013103555657 A CN 2013103555657A CN 201310355565 A CN201310355565 A CN 201310355565A CN 103451430 A CN103451430 A CN 103451430A
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Abstract
The invention discloses an oxygen-enriched smelting furnace for treating a low-grade multi-metal material. The oxygen-enriched smelting furnace comprises a furnace hearth, a copper water jacket furnace wall and a hanging-type steel water jacket which are sequentially arranged from bottom to top, wherein a steel structural frame is arranged on the peripheries of the furnace hearth, the copper water jacket furnace wall and the hanging-type steel water jacket, the furnace hearth is positioned on a skeleton of the bottom surface of the steel structural frame, a fixed frame for connecting with the steel structural frame is arranged on the outer wall of the copper water jacket furnace wall, and the hanging-type steel water jacket is hung at the upper end of the steel structural frame; the copper water jacket furnace wall comprises a plurality of layers of copper water jackets, and the bottom of the copper water jacket at the bottommost layer is provided with an oxygen spray nozzle and a punching slagging device; the upper end of the hanging-type steel water jacket is provided with a flue hole and a charging hole which are communicated with the hanging-type steel water jacket and used for discharging smoke and charging. The left and right deformation of the water jacket is avoided due to the structure of the hanging-type steel water jacket, the defects that a slag hole water jacket is prone to leak, and the furnace shutdown is needed during the replacement of the water jacket are overcome due to the structure of the punching slagging device, and the safety using property of the oxygen-enriched smelting furnace is improved. The oxygen-enriched smelting furnace has the characteristics that during smelting, the amount of flue gas is small, little heat is taken away by flue gas, the temperature of a molten pool is high, and lead and zinc are easy to volatile.
Description
Technical field
The present invention relates to be applicable to non-ferrous metal metallurgy, for plurality of metalliferous materials such as cupric, lead, zinc, carry out oxygen-enriched air smelting, generate copper matte regulus or lead bullion, reclaim a kind of smelting furnace of valuable metal.
Background technology
Along with the enforcement of the industry access conditions such as the increasingly stringent of Environmental Protection in China policy and copper, lead, zinc, for the demand of the nonferrous smelting novel process that meets environmental requirement, low production cost, become increasingly conspicuous.Simultaneously, be accompanied by the minimizing day by day of higher-grade primary ore resource, on the low side to grade, traditional technology is difficult, containing the material of complex multi-metal, propose new processing requirements, the smelting technology of looking for novelty is applicable to multiple valuable metal is reclaimed, and reaches the purpose that the rate of recovery is high, energy consumption is low.For low-grade many metalliferous materials, existing metallurgical furnace is difficult to be processed, and needs a kind of Novel furnace of exploitation, can reclaim the various metals such as copper, lead, zinc, indium simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of low-grade many metalliferous materials that are suitable for processing, reclaim various metals simultaneously, realize environmental protection, energy-conservation, guarantee the oxygen-enriched air smelting stove that novel process for smelting is implemented.
This stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials provided by the invention, it comprises cupola well, copper water jacket furnace wall, the hanging molten steel cover be arranged in order from the bottom up, their the outer steel frame body that is with, cupola well is positioned on the bottom surface skeleton of steel construction support body, the outer wall of copper water jacket furnace wall is useful on the fixed frame be connected with the steel construction support body, and hanging molten steel cover hangs on the upper end of steel construction support body; The copper water jacket furnace wall comprises some layers of copper water jacket, and oxygen jet and punching deslagging device are arranged at the copper water jacket bottom of bottom one deck; The upper end of described hanging molten steel cover has and is communicated with it for smoke evacuation and reinforced floss hole and charging opening.
Described steel construction support body adopts the H section steel manufacture, comprises the hanger and its below resting support for fixing described copper water jacket furnace wall and cupola well of upper end for hanging described hanging molten steel cover, between hanger and resting support, is that dismountable bolt connects.
Comprise three layers of copper water jacket in described copper water jacket furnace wall, be embedded with pure copper tube in copper water jacket, the heating surface that is subject to of copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick.
Described fixedly circle is fixed by screw block and described resting support.
Described punching deslagging device comprises cinder notch copper water jacket and the copper water jacket stopper that is embedded with pure copper tube, be useful on the conical through-hole that the copper water jacket stopper is installed on the width medullary ray of cinder notch copper water jacket, the copper water jacket stopper is assemblied in conical through-hole, there is the boss of position symmetry the non-heating surface of cinder notch copper water jacket, the both sides, top of conical through-hole, the top of two boss all has axial threaded hole, be bolted steel plate between threaded hole, steel plate strides across the upper surface of copper water jacket stopper, makes copper water jacket stopper and cinder notch copper water jacket fixing spacing; The heating surface of described cinder notch copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick.
The axial centre of described copper water jacket stopper has through hole, in the solid side wall outside through hole, is connected with the stainless steel temperature tube, and there is the threaded hole of being convenient to the installation and removal of copper water jacket stopper the outer face of entity.
Described hanging molten steel cover, comprise the inside casing that cross-sectional shape is U-shaped and the cover plate that is fixed in the opening end of inside casing U-shaped, and the outside, U-shaped base of inside casing is heating surface, on heating surface, has division plate grid and slag to follow closely and cover their refractory castable; Water inlet pipe is arranged at the bottom of cover plate, and rising pipe is arranged at top; Cover plate top is useful on the link plate that hangs water jacket, has the slotted eye along its width on link plate, for steel structure connection; Be evenly equipped with some gussets of vertical layout between inside casing and cover plate, gusset is distributed on the non-heating surface of described inside casing, and the inboard of each gusset and the outside be the corresponding notch that is evenly equipped with U-shaped longitudinally, and the upper end of gusset is useful on the hangers of fixing described link plate.
The square hole that has the protuberance between notch adjacent with described gusset to pass on described cover plate, the vertical both sides of cover plate are useful on the ears or side handles of a utensil that adjacent water jacket connects, bolt and access opening are arranged at bottom, the vertical cover plate of bolt is fixed in the top of access opening, be used for and steel structure connection, access opening is externally connected with blind flange.
Described water inlet pipe is positioned at the outside, lower end of gusset, and on it, the gap location of corresponding adjacent gusset has posticum; Described rising pipe is positioned at the outside of described gusset upper end, and its inlet end has outward by back up pad and the fixing flow deflector of described cover plate.
The upper end of described hanging molten steel cover also is useful on the burner mouth of baker, between lower end and described copper water jacket furnace wall, is provided with dilatation joint, for overcoming hanging molten steel, overlaps the swell increment that downward swell increment and copper water jacket furnace wall make progress; Described charging opening and be the jacketed type water-cooling structure, its inwall is stainless steel; Described floss hole is the copper water jacket flue, and the heating surface of its copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick; Described cupola well comprises masonry, and masonry outer is with shaped steel and encloses the table copper water jacket that hoop, upper end are useful on cooling masonry; The metal escape orifice is arranged on masonry.
The load of the whole body of heater of the present invention is all carried by the steel construction support body, cupola well directly is placed on the bottom surface skeleton of steel construction support body, the copper water jacket furnace wall is fixed by screw block and steel construction support body, hanging molten steel cover directly hangs on the upper end of steel construction support body, makes the installation and removal operation of whole body of heater all convenient and swift.
The inner chamber of copper water jacket furnace wall is molten bath, in the copper water jacket bottom of bottom one deck, oxygen jet is set, and makes low-grade material and coal carry out oxygen-enriched air smelting in molten bath.Be embedded with and bury pure copper tube in the copper water jacket of copper water jacket furnace wall, heat side is embedded with the dove-tail brick, protection mutually between dovetail-indent brick and copper water jacket, the life-span of greatly improving furnace wall.The punching deslagging device of special construction is arranged at the bottom of copper water jacket furnace wall.By set up the copper water jacket stopper in the cinder notch copper water jacket, by the steel plate connected on the boss of cinder notch copper water jacket outer end, fix between the two spacing, equal pre-buried pure copper tube in both entities.The copper water jacket stopper is dismounting and change from the open holes of cinder notch copper water jacket easily.While needing slagging, the sealing clay of getting through in copper water jacket stopper intermediate throughholes gets final product.While needing to change, only need more to back out bolt, take out steel plate, tighten the threaded hole that is positioned at copper water jacket stopper outer face with screw rod, bung off, the copper water jacket stopper more renewed, and needn't change the cinder notch copper water jacket, cinder notch copper water jacket and copper water jacket stopper are the copper cooling piece, long service life.Avoided prior art cinder notch molten steel cover because of the defect that the gross distortion strength reduction easily leaks of washing away because of slag, overcome prior art and changed the defect that water jacket needs blowing out, thereby improve the practical safety performance of metallurgical furnace, extend the work-ing life of metallurgical furnace, cost-saving.
Uniform gusset on the non-heating surface of hanging steel inside casing, all offer the U-shaped breach in the interior outside of gusset, makes the horizontal and vertical all Uniform Flows of water coolant between inside casing and cover plate, evenly takes away the heat that the inside casing heating surface absorbs.The water jacket outlet side is provided with flow deflector, stops the generation of vaporization phenomenon.The upper end of water jacket hangs on steel construction by the slotted eye on link plate, the fixed form simple and stable, and convenient disassembly, dismounting does not affect all the other members on every side separately.Can make water jacket expand before and after the slotted eye direction, the left and right distortion of restriction water jacket.In order to guarantee better effect, the lower end of water jacket is fixed by the bolt and the steel construction that are fixed on cover plate, offers corresponding vertically slotted eye on steel construction, can make water jacket expand downwards, and restriction water jacket left and right is out of shape and upwards expands.Make water jacket front and back, distortion downwards when being heated by said structure, limit its left and right distortion, overcome the prior art water jacket defect that left and right is offset has occurred, the top mark that has guaranteed the water jacket top is high, thereby the distortion of water jacket and the distortion of stove have been avoided, then improve the safe application performance of metallurgical furnace kiln, extended the work-ing life of metallurgical furnace kiln.
Principle of work of the present invention is as follows: low-grade material and coal add from the charging opening of hanging molten steel set upper side, in the oxygen jet of oxygen-rich air from bottom layer of copper water jacket, blast, low-grade material, coal and oxygen carry out oxygen-enriched air smelting in the molten bath of copper water jacket furnace wall.That the oxygen enriched molten bath melting has that exhaust gas volumn is little, the flue gas band becomes popular is low, bath temperature is high, the more volatile characteristics of plumbous zinc.Low-grade material melts, decomposition, desulfurization, make the reactions such as sulphur, slag making; Coal and oxygen reaction carry out combustion reactions, for melting reaction provides heat.The copper melted out or plumbous metal escape orifice discharge from cupola well, metallurgical slag is discharged from the punching deslagging device of copper water jacket furnace wall bottom.Plumbous, zinc mainly is stored in metallurgical slag with oxide form; The concentration of precious metal such as gold and silver are in copper or lead, and the volatile metal collection such as arsenic, indium are in flue dust; Above valuable metal all can be reclaimed by other flow process after enrichment, thereby reaches the purpose that various metals reclaims simultaneously.
The accompanying drawing explanation
The main TV structure schematic diagram that Fig. 1 is the preferred embodiment of the present invention.
The schematic top plan view that Fig. 2 is Fig. 1.
Fig. 3 is the A-A schematic diagram in Fig. 1.
The main TV structure schematic diagram that Fig. 4 is molten steel cover in Fig. 3.
Fig. 5 is the B-B schematic diagram in Fig. 4.
The structural representation that Fig. 6 is gusset in Fig. 4.
The main TV structure schematic diagram that Fig. 7 is punching deslagging device in Fig. 3.
Fig. 8 is the C-C schematic diagram in Fig. 7.
Embodiment
Preferred embodiment, as shown in Figures 1 to 8, this stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials provided by the invention, the cupola well 2 that comprises steel construction support body 1 and be arranged in order from the bottom up, copper water jacket furnace wall 3, hanging molten steel cover 4.Steel construction support body 1 comprise bottom for the resting support 11 that supports cupola well 2 and copper water jacket furnace wall 3 and its upper end for hanging the hanger 12 of hanging molten steel cover 4, the cutting load that the carrying body of heater produces.The outer wall of copper water jacket furnace wall 3 has fixed frame 7, and fixed frame 7 is fixing by screw block 8 and resting support 11.Hanger 12 all adopts the H section steel manufacture with resting support 11, between hanger 12 and resting support 11, for dismountable bolt, is connected.
Cupola well 2 comprises that masonry 22 and H shaped steel enclose the table copper water jacket 23 of hoop 21 and cooling masonry 22.H shaped steel encloses the globality that hoop 21 has guaranteed masonry 22, and masonry 22 is I class masonry, adopts refractory brick, brickwork joint is not more than 1mm, masonry 22 brick body topmost need guarantee planeness, and table copper water jacket 23 is placed on masonry 22 brick body topmost, to 22 cooling effects of masonry.Metal escape orifice 9 is arranged on masonry 22.
Copper water jacket furnace wall 3 is for burying fine copper tubular type copper water jacket, and the heating surface of copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick, comprises three layers of copper water jacket, and oxygen jet 5 and punching deslagging device 6 are arranged on the copper water jacket of bottom one deck.
Punching deslagging device 6 comprises cinder notch copper water jacket 61 and the copper water jacket stopper 63 that is embedded with copper pipe, be useful on the conical through-hole that copper water jacket stopper 63 is installed on the width medullary ray of cinder notch copper water jacket 61, copper water jacket stopper 63 is dismountable to be fixed in conical through-hole, there is the boss 611 of position symmetry the non-heating surface of cinder notch copper water jacket 61, the both sides, top of conical through-hole, be bolted steel plate 62 between two boss 611, steel plate 62 strides across the outer face of copper water jacket stopper 63, makes copper water jacket stopper 63 and cinder notch copper water jacket 61 fixing spacing.The heating surface of cinder notch copper water jacket 61 is embedded with the dovetail-indent brick.The axial centre of copper water jacket stopper 63 has through hole, in the solid side wall outside through hole, is connected with stainless steel thermometric steel pipe 66, and there is the threaded hole of being convenient to 63 installation and removal of copper water jacket stopper the outer face of entity.
Hanging molten steel cover 4 comprises inside casing 41, cover plate 47 and link plate 45, and the cross-sectional shape of inside casing 41 is U-shaped, and its outside, base is heating surface, and cover plate 47 is fixed in the opening end of U-shaped; Division plate grid 49 and slag nail 412 is arranged on the heating surface of inside casing 41 and cover their refractory castable 414; Vertical uniform some gussets 42 are arranged between inside casing 41 and cover plate 47, and the inboard of each gusset 42 and the outside be the corresponding notch that is evenly equipped with U-shaped longitudinally, and the upper end of gusset 42 is useful on the fixedly hangers of link plate 45.The square hole that has the protuberance between notch adjacent with gusset 42 to pass on cover plate 47.The vertical both sides of cover plate 47 are useful on the ears or side handles of a utensil 46 that adjacent water jacket connects, access opening and blowdown connection 48 are arranged at bottom, access opening is externally connected with blind flange 415, and blowdown connection 48 is positioned at the below of access opening, and there is the ball valve 416 docked with blow-off line the outer end of blowdown connection 48.On cover plate 47, there are respectively rising pipe 411 and water inlet pipe 410 in the upper and lower end of corresponding gusset 46 outside, and the gap location of water inlet pipe 411 corresponding gusset 42 on the horizontal section between cover plate 47 and inside casing 41 has posticum; The inlet end of rising pipe 411 has flow deflector 44, and flow deflector 44 is fixing with cover plate 47 by back up pad 43.
There is floss hole 417, charging opening 418 and the burner mouth 419 be communicated with it for smoke evacuation, reinforced and baker the upper end of hanging molten steel cover 4.Charging opening 418 is the jacketed type water-cooling structure, and its inwall is stainless steel.Lower end and 3 of the copper water jacket furnace walls of hanging molten steel cover 4 are provided with dilatation joint, for overcoming hanging molten steel, overlap the swell increment that 4 downward swell incremenies and copper water jacket furnace wall 3 make progress; Charging opening 418 is the jacketed type water-cooling structure, and its inwall is stainless steel; Floss hole 417 is the copper water jacket flue, and the heating surface of its copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick.
Principle of work of the present invention is as follows: during blow-on, high-temperature fusant is sent in cupola well 2 by punching deslagging device 6, formed molten bath, with mud, shut runoff notch, heated up by burner mouth 419.During melting, in the oxygen jet 5 of oxygen-rich air from bottom layer of copper water jacket, blast, the charging opening 417 that low-grade material and coal overlap 4 upper ends from hanging molten steel adds, and low-grade material, coal and oxygen carry out oxygen-enriched air smelting in the molten bath of copper water jacket furnace wall.That the oxygen enriched molten bath melting has that exhaust gas volumn is little, the flue gas band becomes popular is low, bath temperature is high, the more volatile characteristics of plumbous zinc.Low-grade material melts, decomposition, desulfurization, make the reactions such as sulphur; Coal and oxygen reaction carry out combustion reactions, for melting reaction provides heat.The copper melted out or plumbous metal escape orifice 9 discharges from cupola well 2.When refining is plumbous, metallurgical slag is from punching deslagging device 6(Fig. 3 of copper water jacket furnace wall 3 sidepieces) discharge, advance the oxygen enrichment reduction furnace, during copper metallurgy, metallurgical slag is from punching deslagging device 6(Fig. 1 of copper water jacket furnace wall 3 headwalls) discharge, advance fuming furnace.Furnace wall 3 ends arrange end cinder notch punching deslagging device 6(Fig. 3), be convenient to change the tuyere spray gun.Plumbous, zinc mainly is stored in metallurgical slag with oxide form; The concentration of precious metal such as gold and silver are in copper or lead, and the volatile metal collection such as arsenic, indium are in flue dust; Above valuable metal all can be reclaimed by other flow process after enrichment, thereby reaches the purpose that various metals reclaims simultaneously.
Claims (10)
1. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials, it is characterized in that: this smelting furnace comprises cupola well, copper water jacket furnace wall, the hanging molten steel cover be arranged in order from the bottom up, their the outer steel frame body that is with, cupola well is positioned on the bottom surface skeleton of steel construction support body, the outer wall of copper water jacket furnace wall is useful on the fixed frame be connected with the steel construction support body, and hanging molten steel cover hangs on the upper end of steel construction support body; The copper water jacket furnace wall comprises some layers of copper water jacket, and oxygen jet and punching deslagging device are arranged at the copper water jacket bottom of bottom one deck; The upper end of described hanging molten steel cover has and is communicated with it for smoke evacuation and reinforced floss hole and charging opening.
2. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 1, it is characterized in that: described steel construction support body adopts the H section steel manufacture, comprising the hanger and its below resting support for fixing described copper water jacket furnace wall and cupola well of upper end for hanging described hanging molten steel cover, is that dismountable bolt connects between hanger and resting support.
3. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 2, it is characterized in that: comprise three layers of copper water jacket in described copper water jacket furnace wall, be embedded with pure copper tube in copper water jacket, the heating surface of copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick.
4. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 2, it is characterized in that: described fixedly circle is fixed by screw block and described resting support.
5. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 1, it is characterized in that: described punching deslagging device comprises cinder notch copper water jacket and the copper water jacket stopper that is embedded with pure copper tube, be useful on the conical through-hole that the copper water jacket stopper is installed on the width medullary ray of cinder notch copper water jacket, the copper water jacket stopper is assemblied in conical through-hole, the non-heating surface of cinder notch copper water jacket, there is the boss of position symmetry the both sides, top of conical through-hole, the top of two boss all has axial threaded hole, be bolted steel plate between threaded hole, steel plate strides across the upper surface of copper water jacket stopper, make copper water jacket stopper and cinder notch copper water jacket fixing spacing, the heating surface of cinder notch copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick.
6. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 5, it is characterized in that: the axial centre of described copper water jacket stopper has through hole, be connected with the stainless steel temperature tube in solid side wall outside through hole, there is the threaded hole of being convenient to the installation and removal of copper water jacket stopper the outer face of entity.
7. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 5, it is characterized in that: described hanging molten steel cover, comprise the inside casing that cross-sectional shape is U-shaped and the cover plate that is fixed in the opening end of inside casing U-shaped, the outside, U-shaped base of inside casing is heating surface, on heating surface, has division plate grid and slag to follow closely and cover their refractory castable; Water inlet pipe is arranged at the bottom of cover plate, and rising pipe is arranged at top; Cover plate top is useful on the link plate that hangs water jacket, has the slotted eye along its width on link plate, for steel structure connection; Be evenly equipped with some gussets of vertical layout between inside casing and cover plate, gusset is distributed on the non-heating surface of described inside casing, and the inboard of each gusset and the outside be the corresponding notch that is evenly equipped with U-shaped longitudinally, and the upper end of gusset is useful on the hangers of fixing described link plate.
8. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 7, it is characterized in that: the square hole that has the protuberance between notch adjacent with described gusset to pass on described cover plate, the vertical both sides of cover plate are useful on the ears or side handles of a utensil that adjacent water jacket connects, bolt and access opening are arranged at bottom, the vertical cover plate of bolt is fixed in the top of access opening, be used for and steel structure connection, access opening is externally connected with blind flange.
9. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials according to claim 7 is characterized in that: described water inlet pipe is positioned at the outside, lower end of gusset, and on it, the gap location of corresponding adjacent gusset has posticum; Described rising pipe is positioned at the outside of described gusset upper end, and its inlet end has outward by back up pad and the fixing flow deflector of described cover plate.
10. the stove of the oxygen-enriched air smelting for the treatment of low-grade many metalliferous materials as claimed in claim 1, it is characterized in that: the upper end of described hanging molten steel cover also is useful on the burner mouth of baker, be provided with dilatation joint between lower end and described copper water jacket furnace wall, for overcoming hanging molten steel, overlap the swell increment that downward swell increment and copper water jacket furnace wall make progress; Described charging opening and be the jacketed type water-cooling structure, its inwall is stainless steel; Described floss hole is the copper water jacket flue, and the heating surface of its copper water jacket is evenly equipped with dovetail-indent, and it is embedded with corresponding dovetail-indent shaped brick; Described cupola well comprises masonry, and masonry outer is with shaped steel and encloses the table copper water jacket that hoop, upper end are useful on cooling masonry; The metal escape orifice is arranged on masonry.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104457261A (en) * | 2014-12-22 | 2015-03-25 | 铜陵求精机械有限公司 | Molten steel jacket at feed position of furnace top of oxygen-enriched side-blown furnace |
| CN106755686A (en) * | 2016-12-19 | 2017-05-31 | 北京神雾环境能源科技集团股份有限公司 | Molten point of stove |
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| CN104457261A (en) * | 2014-12-22 | 2015-03-25 | 铜陵求精机械有限公司 | Molten steel jacket at feed position of furnace top of oxygen-enriched side-blown furnace |
| CN106755686A (en) * | 2016-12-19 | 2017-05-31 | 北京神雾环境能源科技集团股份有限公司 | Molten point of stove |
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Application publication date: 20131218 |