CN203393205U - Oxygen-enriched melting furnace used for treating low-grade multi-metal materials - Google Patents
Oxygen-enriched melting furnace used for treating low-grade multi-metal materials Download PDFInfo
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- CN203393205U CN203393205U CN201320498122.9U CN201320498122U CN203393205U CN 203393205 U CN203393205 U CN 203393205U CN 201320498122 U CN201320498122 U CN 201320498122U CN 203393205 U CN203393205 U CN 203393205U
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Abstract
The utility model discloses an oxygen-enriched melting furnace used for treating low-grade multi-metal materials. The oxygen-enriched melting furnace comprises a hearth, copper water jacket furnace walls and a hanging molten steel jacket, which are arranged from bottom to top in sequence, wherein a steel structured frame body is arranged on the peripheries of the hearth, the copper water jacket furnace walls and the hanging molten steel jacket; the hearth is arranged on a bottom framework of the steel structured frame body; fixed frames connected with the steel structured frame body are arranged on the outer walls of the copper water jacket furnace walls; the hanging molten steel jacket is hung at the upper end of the steel structured frame body; each copper water jacket furnace wall comprises a plurality of layers of copper water jackets; oxygen nozzles and punching and slagging devices are arranged at the bottom of the lowest copper water jacket; a flue hole and a charging hole, which are communicated with the hanging molten steel jacket and are respectively used for exhausting smoke and charging are arranged at the upper end of the hanging molten steel jacket. The oxygen-enriched melting furnace has the beneficial effects that horizontal deformation of the water jackets is avoided via the structure of the hanging molten steel jacket; the defects that the water jackets at the slag holes are liable to water leakage and the furnace needs to be shut down when the water jackets are changed are overcome and the safe use property of the melting furnace is improved via the structures of the punching and slagging devices; by adopting oxygen-enriched molten pools for melting, the oxygen-enriched melting furnace has the characteristics of low flue gas quantity, low heat carry away of flue gas, high molten pool temperature and easier volatilization of lead and zinc.
Description
Technical field
The utility model relates to and is applicable to non-ferrous metal metallurgy, for plurality of metalliferous materials such as cupric, lead, zinc, carries out oxygen-enriched air smelting, generates copper matte regulus or lead bullion, reclaims a kind of smelting furnace of valuable metal.
Background technology
Enforcement along with industry access conditions such as the increasingly stringent of Environmental Protection in China policy and copper, lead, zinc, becomes increasingly conspicuous for the demand that meets the nonferrous smelting novel process of environmental requirement, low production cost.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 to reclaim, and reaches the object that the rate of recovery is high, energy consumption is low.For low-grade many metalliferous materials, existing metallurgical furnace is difficult to process, and needs a kind of Novel furnace of exploitation, can reclaim the various metals such as copper, lead, zinc, indium simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of low-grade many metalliferous materials that are suitable for processing, and reclaims various metals simultaneously, realizes environmental protection, energy-conservation, guarantees the oxygen-enriched air smelting stove that novel process for smelting is implemented.
This oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials that the utility model provides, it comprises cupola well, copper water jacket furnace wall, the hanging molten steel cover being 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 being connected with steel construction support body, and hanging molten steel cover hangs on the upper end of steel construction support body; 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; Described hanging molten steel Tao upper end has and is communicated with it for discharging fume and reinforced floss hole and charging opening.
Described steel construction support body adopts H section steel manufacture, comprises that upper end, for hanging the hanger and the resting support of its below for fixing described copper water jacket furnace wall and cupola well of described hanging molten steel cover, is that dismountable bolt connects between hanger and resting support.
In described copper water jacket furnace wall, comprise three layers of copper water jacket, 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, on the width medullary ray of cinder notch copper water jacket, be useful on the conical through-hole that copper water jacket stopper is installed, 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, between threaded hole, be bolted steel plate, 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, is connected with stainless steel temperature tube in the solid side wall outside through hole, 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, comprises that cross-sectional shape is the inside casing of U-shaped and the cover plate that is fixed on the opening end of inside casing U-shaped, and the outside, U-shaped base of inside casing is heating surface, has division plate grid and slag to follow closely and cover their refractory castable on heating surface; 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; Between inside casing and cover plate, be evenly equipped with some gussets of vertical layout, gusset is distributed on the non-heating surface of described inside casing, and the inner side of each gusset and 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 on 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.
Described hanging molten steel Tao upper end is also useful between the burner Kou， lower end of baker and described copper water jacket furnace wall and 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 jacketed type water-cooling structure, its inwall is stainless steel; Described floss hole is 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 the table copper water jacket that shaped steel Wei Gu, upper end is useful on cooling masonry; On masonry, there is metal escape orifice.
The load of the whole body of heater of the utility model is all carried by steel construction support body, cupola well is directly placed on the bottom surface skeleton of steel construction support body, 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 to carry out oxygen-enriched air smelting in low-grade material He Mei molten bath.In the copper water jacket of copper water jacket furnace wall, be embedded with and bury pure copper tube, heat side is embedded with 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 copper water jacket stopper in cinder notch copper water jacket, by the steel plate connecting 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.Copper water jacket stopper is dismounting and change from the open holes of cinder notch copper water jacket easily.While needing slagging, get through the sealing clay in copper water jacket stopper intermediate throughholes.In the time of need to changing, only need more to back out bolt, take out steel plate, with screw rod, tighten the threaded hole that is positioned at copper water jacket stopper outer face, bung off, the copper water jacket stopper more renewing, and needn't change cinder notch copper water jacket, cinder notch copper water jacket and copper water jacket stopper are copper cooling piece, long service life.Avoided prior art cinder notch molten steel cover because of the defect that 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 offers 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 inside casing heating surface absorbs.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, fixed form simple and stable, and convenient disassembly, dismounting does not affect all the other members around separately.Can make water jacket expand before and after 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.By said structure, make water jacket front and back, distortion downwards when being heated, limit its left and right distortion, overcome prior art water jacket the defect that left and right is offset has occurred, the top mark that has guaranteed 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 utility model 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 oxygen enriched molten bath melting has that exhaust gas volumn is little, flue gas band becomes popular is low, bath temperature is high, the more volatile feature 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 melting 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 is mainly 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 reclaim by other flow process after enrichment, thereby reaches the object that various metals reclaims simultaneously.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of the utility model preferred embodiment.
Fig. 2 is the schematic top plan view of Fig. 1.
Fig. 3 is the A-A schematic diagram in Fig. 1.
Fig. 4 is the main TV structure schematic diagram of molten steel cover in Fig. 3.
Fig. 5 is the B-B schematic diagram in Fig. 4.
Fig. 6 is the structural representation of gusset in Fig. 4.
Fig. 7 is the main TV structure schematic diagram of deslagging device of punching 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 oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials that the utility model provides, 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 11He Qi upper end of supporting cupola well 2 and copper water jacket furnace wall 3 for hanging the hanger 12 of hanging molten steel cover 4, the cutting load that 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 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.On masonry 22, there is metal escape orifice 9.
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, has oxygen jet 5 and punching deslagging device 6 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, on the width medullary ray of cinder notch copper water jacket 61, be useful on the conical through-hole that copper water jacket stopper 63 is installed, 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, between two boss 611, be bolted steel plate 62, steel plate 62 strides across copper water jacket stopper 63 outer face, 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 dovetail-indent brick.The axial centre of copper water jacket stopper 63 has through hole, is connected with stainless steel thermometric steel pipe 66 in the solid side wall outside through hole, 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 outside, cross-sectional shape WeiUXing，Qi base of inside casing 41 is heating surface, and cover plate 47 is fixed on the opening end of U-shaped; On the heating surface of inside casing 41, there is division plate grid 49 and slag nail 412 and cover their refractory castable 414; Between inside casing 41 and cover plate 47, have vertical uniform some gussets 42, the inner side of each gusset 42 and outside be the corresponding notch that is evenly equipped with U-shaped longitudinally, and gusset 42 upper end 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 docking with blow-off line blowdown connection 48 outer end.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.
The upper end of hanging molten steel cover 4 have be communicated with it for discharging fume, floss hole 417, charging opening 418 and the burner mouth 419 of reinforced and baker.Charging opening 418 is 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 jacketed type water-cooling structure, and its inwall is stainless steel; Floss hole 417 is 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 utility model 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, by burner mouth 419, heat up.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 oxygen enriched molten bath melting has that exhaust gas volumn is little, flue gas band becomes popular is low, bath temperature is high, the more volatile feature 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 melting 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, enter 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, enter fuming furnace.Furnace wall 3 ends arrange end cinder notch punching deslagging device 6(Fig. 3), be convenient to change tuyere spray gun.Metallurgical slag is discharged from the punching deslagging device 6 of copper water jacket furnace wall 3 bottoms.Plumbous, zinc is mainly 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 reclaim by other flow process after enrichment, thereby reaches the object that various metals reclaims simultaneously.
Claims (10)
1. the oxygen-enriched air smelting stove 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 being 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 being connected with steel construction support body, and hanging molten steel cover hangs on the upper end of steel construction support body; 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; Described hanging molten steel Tao upper end has and is communicated with it for discharging fume and reinforced floss hole and charging opening.
2. the oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials according to claim 1, it is characterized in that: described steel construction support body adopts H section steel manufacture, comprise that upper end, for hanging the hanger and the resting support of its below for fixing described copper water jacket furnace wall and cupola well of described hanging molten steel cover, is that dismountable bolt connects between hanger and resting support.
3. the oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials according to claim 2, it is characterized in that: in described copper water jacket furnace wall, comprise three layers of copper water jacket, in copper water jacket, be embedded with pure copper tube, 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 oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials according to claim 2, is characterized in that: described fixedly circle is fixed by screw block and described resting support.
5. the oxygen-enriched air smelting stove 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, on the width medullary ray of cinder notch copper water jacket, be useful on the conical through-hole that copper water jacket stopper is installed, 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, between threaded hole, be bolted steel plate, 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 oxygen-enriched air smelting stove 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, in solid side wall outside through hole, be connected with stainless steel temperature tube, 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 oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials according to claim 5, it is characterized in that: described hanging molten steel cover, comprise that cross-sectional shape is the inside casing of U-shaped and the cover plate that is fixed on the opening end of inside casing U-shaped, the outside, U-shaped base of inside casing is heating surface, has division plate grid and slag to follow closely and cover their refractory castable on heating surface; 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; Between inside casing and cover plate, be evenly equipped with some gussets of vertical layout, gusset is distributed on the non-heating surface of described inside casing, and the inner side of each gusset and 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 oxygen-enriched air smelting stove 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 on the top of access opening, be used for and steel structure connection, access opening is externally connected with blind flange.
9. the oxygen-enriched air smelting stove 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 oxygen-enriched air smelting stove for the treatment of low-grade many metalliferous materials as claimed in claim 1, it is characterized in that: described hanging molten steel Tao upper end is also useful on the burner mouth of baker, between lower end and described copper water jacket furnace wall, be provided with dilatation joint, 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 jacketed type water-cooling structure, its inwall is stainless steel; Described floss hole is 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 the table copper water jacket that shaped steel Wei Gu, upper end is useful on cooling masonry; On masonry, there is metal escape orifice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320498122.9U CN203393205U (en) | 2013-08-15 | 2013-08-15 | Oxygen-enriched melting furnace used for treating low-grade multi-metal materials |
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| CN201320498122.9U CN203393205U (en) | 2013-08-15 | 2013-08-15 | Oxygen-enriched melting furnace used for treating low-grade multi-metal materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451430A (en) * | 2013-08-15 | 2013-12-18 | 长沙有色冶金设计研究院有限公司 | Oxygen-enriched smelting furnace for treating low-grade multi-metal material |
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2013
- 2013-08-15 CN CN201320498122.9U patent/CN203393205U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451430A (en) * | 2013-08-15 | 2013-12-18 | 长沙有色冶金设计研究院有限公司 | Oxygen-enriched smelting furnace for treating low-grade multi-metal material |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190826 Address after: 410019 Qingxi Chuanjiu Office Building and 113 Comprehensive Building, 299 Mulian East Road, Yuhua District, Changsha City, Hunan Province Patentee after: China Aluminum Environmental Protection and Energy Saving Technology (Hunan) Co.,Ltd. Address before: 410011 Changsha Jiefang Middle Road, Hunan, No. 199 Patentee before: CHANGSHA ENGINEERING & RESEARCH INSTITUTE OF NONFERROUS METALLURGY Co.,Ltd. |
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Granted publication date: 20140115 |