CN203820868U - Continuous fuming furnace - Google Patents
Continuous fuming furnace Download PDFInfo
- Publication number
- CN203820868U CN203820868U CN201420191744.1U CN201420191744U CN203820868U CN 203820868 U CN203820868 U CN 203820868U CN 201420191744 U CN201420191744 U CN 201420191744U CN 203820868 U CN203820868 U CN 203820868U
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- furnace
- spray gun
- slag
- fuming furnace
- continous way
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The utility model discloses a continuous fuming furnace. The continuous fuming furnace comprises a furnace body, wherein a furnace chamber is arranged in the furnace body, a partition wall and a slag dam for dividing the interior of the furnace chamber into a melting area, a blowing area and a depleting area are arranged in the furnace chamber, and the areas are separated by the partition wall and the slag dam. A first channel which is communicated with the melting area and the blowing area is arranged at the lower end of the partition wall, the partition wall is higher than the liquid level in a melting tank, and the slag dam is lower than the liquid level in the melting tank. A feeding port for feeding materials into the melting area, a smoke outlet, a first spray gun port, a second spray gun port as well as a slag discharge port for discharging discarded slag from the depleting area are formed on the furnace body. The continuous fuming furnace also comprises a first spray gun and a second spray gun, wherein the first spray gun is inserted into the first spray gun port and used for spraying pulverized coal and oxygen-containing gas into the melting area, and the second spray gun is inserted into the second spray gun port and used spraying the pulverized coal and the oxygen-containing gas into the blowing area and the depleting area. The continuous fuming furnace according to the utility model can continuously treat furnace slag.
Description
Technical field
The utility model relates to smelting field of nonferrous metal, relates to particularly a kind of continous way fuming furnace.
Background technology
Fuming furnace is conventional non-ferrous metal metallurgy equipment, for example, for refining the processing of the slag of plumbous zinc.Fuming furnace in correlation technique cannot be processed cold burden conventionally, even if process cold burden, the amount of cold burden is also restricted.In addition, fuming furnace in correlation technique is all also referred to as discontinuous fuming furnace, operation is discontinuous, be that charging and slagging are all discontinuous, after one batch materials is disposed, therefore after emptying, carry out the processing of next batch material, have that processing efficiency is low, energy consumption is high, and have the frequent alternately operating that starts and stop.Air feed, coal supply also need to exchange thereupon, and complex operation is also dangerous.For realize to process the different material of all kinds of leaded, zinc and make continuous fuming, stablize operation, reduce energy consumption, need to develop the demand that a kind of continuous fuming furnace device and technique thereof meet market.
Utility model content
The utility model is intended to solve at least to a certain extent one of above-mentioned technical problem of the prior art.For this reason, an object of the present utility model is to propose a kind of continous way fuming furnace, and the material of the volatile metal such as that this continous way fuming furnace can be processed is continuously leaded, zinc, tin, as lead-zinc furnace cinder, zinc factory leached mud, medium tin ore etc.
According to continous way fuming furnace of the present utility model, comprise body of heater, in described body of heater, there is furnace chamber, in described furnace chamber, be provided with for described furnace chamber being separated into partition wall and the slag dam of melting area, blowing district and stripping section, the lower end of described partition wall is provided with the first channel that is communicated with described melting area and described blowing district, described partition wall is higher than bath surface and described slag dam lower than bath surface, and described body of heater is provided with smoke outlet, the first gun slot, the second gun slot, for adding the charging opening of material and for discharge the slag notch of waste from described stripping section in described melting area; The first spray gun and the second spray gun, described the first spray gun is inserted in described the first gun slot, for spray into fine coal and oxygen-containing gas in described melting area, described the second spray gun is inserted in described the second gun slot, for spray into fine coal and oxygen-containing gas in described blowing district and described stripping section.
According to continous way fuming furnace of the present utility model, in body of heater, be provided with the partition wall and the slag dam that furnace chamber are separated into melting area, blowing district and stripping section, and body of heater is provided with the first gun slot being communicated with melting area, and the second gun slot being communicated with blowing district and stripping section, and slag notch is communicated with stripping section.When discharging residue by slag notch, the liquid in furnace chamber can not discharged completely, therefore, in discharge process, still can in furnace chamber, put into pending material.Thus, this fuming furnace can move continuously, has improved the efficiency of this fuming furnace material handling.By the first gun slot, to melting area, pass into oxygen-containing gas and fine coal, and to blowing district and stripping section, pass into oxygen-containing gas and fine coal by the second gun slot, be convenient to control respectively passing into oxygen and the fine coal of the first spray gun and the second spray gun, to reach optimum value, thereby improve the efficiency that reaction is carried out.
In addition, the continous way fuming furnace above-mentioned according to the utility model, can also have following additional technical characterictic:
Described charging opening comprises for adding the heat material of heat material to add entrance to melting area and for add the cold burden of cold burden to add entrance to melting area.Thus, be convenient to add cold burden and/or heat material in furnace chamber, can facilitate this continous way fuming furnace to process cold burden or heat material, can reduce the operation of this continous way fuming furnace material handling, improve processing efficiency, also can realize and process cold burden operation completely.
Described heat material adds entrance and can seal on the sidewall that is located at described body of heater.Thus, when this continous way fuming furnace is only processed cold burden, heat can be expected to heating gate sealing, thereby reduction calorific loss, improves energy utilization rate, energy-conserving and environment-protective, even if process cold burden completely, heat material charging opening enters the startup that heat material is conducive to stove, reduces start time.
Described slag notch comprises higher than the upper slag notch of described the first gun slot and the second gun slot with lower than the lower slag notch of described the first gun slot and the second gun slot, is also provided with the drain that approaches described furnace chamber diapire on described body of heater.Upper slag notch slagging during normal running, in the time of need to changing spray gun, lower slag notch slagging.Drain is positioned at lower slag notch below near the position of furnace bottom, melt in emptying stove when drain is used for blowing out.
Described body of heater is also provided with the overfiren air port that blasts oxygen-containing gas for the top to described furnace chamber.With CO and combustiblematerials superfluous in after-flame furnace gas, to guarantee that the safety of waste heat boiler and dust collecting system carries out.
Described slag dam lower end is provided with the second passage that is communicated with described blowing district and described stripping section.Thus, be convenient to shut down melt in emptying stove.
Described furnace chamber diapire is anti-domes, is tilted to put slope by melting area to stripping section.
Accompanying drawing explanation
Fig. 1 is the cross-sectional figure of the continuous fuming furnace of the utility model embodiment.
Fig. 2 is the sectional side elevation of the continuous fuming furnace of the utility model embodiment.
Reference numeral: continous way fuming furnace 100; Body of heater 1; Furnace chamber 11; Melting area 12; Blowing district 13; Stripping section 14; Manhole plate 16; Partition wall 21; Slag dam 22; First channel 15; Heat material adds entrance 101; Smoke outlet 102; The first gun slot 103; The second gun slot 104; Slag notch 105; Cold burden adds entrance 107; Upper slag notch 105a; Lower slag notch 105b; Drain 106; Overfiren air port 108; Second passage 109.
Embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or be integral; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Fuming furnace is conventional non-ferrous metal metallurgy equipment, for example, for refining the processing of the slag of plumbous zinc.Fuming furnace in correlation technique cannot be processed cold burden conventionally, even if process cold burden, the amount of cold burden is also restricted.In addition, the fuming furnace in correlation technique is all also referred to as discontinuous fuming furnace, and operation is discontinuous, i.e. charging and slagging are all discontinuous, after a batch materials is disposed, carries out the processing of next batch material after emptying, has thus that processing efficiency is low, energy consumption is high.The utility model proposes a kind of continous way fuming furnace for this reason.
Describe with reference to the accompanying drawings the continous way fuming furnace 100 of the utility model embodiment in detail.The material of the volatile metals such as that this continous way fuming furnace can be processed is continuously leaded, zinc, tin, as lead-zinc furnace cinder, zinc factory leached mud, medium tin ore and scruff etc.
According to the continous way fuming furnace 100 of the utility model embodiment, comprise body of heater 1, in body of heater 1, there is furnace chamber 11, in furnace chamber 11, be provided with for furnace chamber 11 being separated into partition wall 21 and the slag dam 22 of melting area 12, blowing 13He stripping section, district 14, the lower end of partition wall 21 is provided with the first channel 15 that is communicated with melting area 12 and blowing district 13, and partition wall 21 is higher than slag dam 22, in the actual use procedure of this continous way fuming furnace, partition wall 21 is higher than bath surface A, and slag dam 22 is lower than bath surface A.Body of heater 1 is provided with charging opening, smoke outlet 102, the first gun slot 103, the second gun slot 104 and slag notch 105.Charging opening is for add material in melting area 12, and slag notch 105 is for the 14 discharge wastes from stripping section.In addition, on continous way fuming furnace 100, be also provided with the first spray gun and the second spray gun, the first spray gun is inserted in the first gun slot 103, for spray into fine coal and oxygen-containing gas in melting area 12, the second spray gun is inserted in the second gun slot 104, for spray into fine coal and oxygen-containing gas in blowing 13He stripping section, district 14.
Slag notch 105 is communicated with stripping section 14.During normal work, by slag notch 105 discharge residues, the liquid in furnace chamber 11 can not discharged completely, therefore, in tapping process, still can in furnace chamber 11, put into pending material.Thus, this fuming furnace 100 can move continuously, has improved the efficiency of these fuming furnace 100 material handlings.By the first gun slot 103, to melting area, 12 pass into oxygen-containing gas and fine coal, and to blowing 13He stripping section, district 14, pass into oxygen-containing gas and fine coal by the second gun slot 104, be convenient to oxygen and the fine coal of the first spray gun and the second spray gun to control respectively, to reach optimum value, thereby improve the efficiency that reaction is carried out.
Particularly, heat material is from heat material adds the melting area 12 that entrance 101 adds furnace chamber 11, the 12 interior fusings in melting area of heat material, and enter blowing district 13 by first channel 15, and carry out reduction volatilization in blowing district 13, slag will continue reduction volatilization in slag dam 22 enters stripping section 14, regularly from slag notch 105, discharge.
Continous way fuming furnace of the present utility model also has miscellaneous part, and such as corrosion barrier etc., for can be known in prior art, the utility model be elaborated.
Oxygen-containing gas in the utility model is that air, oxygen-rich air or other do not affect the gas that contains oxygen of fuming.Describedly do not affect fuming and refer to that other composition in gas gas can not react with material or flue dust, or can not affect the composition of flue dust, this is understandable for those of ordinary skill in the art.
Described charging opening comprises for adding the heat material of heat material to add entrance 101 to melting area and for add the cold burden of cold burden to add entrance 107 to melting area.Thus, be convenient to add cold burden and/or heat material in furnace chamber, can facilitate this continous way fuming furnace to process cold burden or heat material, can reduce the operation of this continous way fuming furnace material handling, improve processing efficiency, also can realize and process cold burden operation completely.
During normal production, the melt in this continous way fuming furnace 100 remains at the melting rate that spray gun accelerates cold burden above, and to improve the ability of processing cold burden, fuel saving, has guaranteed the ability of continuous processing cold burden.
Concrete, as shown in Figure 1, heat material adds on the sidewall that entrance 101 is located at body of heater 1, can avoid the slag of body of heater 1 interior liquid state to add entrance 107 from cold burden and overflow, and has improved the stability that fuming furnace is processed slag, and operation environment safety, avoids contaminate environment.
Because continous way fuming furnace 100 of the present utility model can directly be processed cold burden continuously, while not processing heat material, heat material of the present utility model adds entrance 101 and can seal.Thereby reduction calorific loss, improves energy utilization rate, energy-conserving and environment-protective.
Certainly, continous way fuming furnace of the present utility model can add the mixture of cold burden, heat material or heat material and cold burden continuously, fuming furnace of the present utility model is to adding whether the raw material in furnace chamber is that cold burden or heat material are not restricted, to what add in fuming furnace, be no matter cold burden or heat material, the operation that fuming furnace all can be continuous.
As depicted in figs. 1 and 2, in examples more of the present utility model, slag notch 105 comprises higher than the upper slag notch 105a of the first gun slot 103 and the second gun slot 104 with lower than the lower slag notch 105b of the first gun slot 103 and the second gun slot 104, and on body of heater 1, is also provided with the drain 106 that approaches furnace chamber 11 diapires.Can regularly discharge the residue that has reacted rear generation by upper slag notch 105a and lower slag notch 105b, also can empty by the internal space of 106 pairs of continous way fuming furnaces 100 of drain, so that maintenance etc.
Particularly, upper slag notch 105a slagging during normal running, in the time of need to changing spray gun, lower slag notch 105b slagging.Drain 106 is positioned at lower slag notch 105b below near the position of furnace chamber diapire, drain 106 melt in emptying stove during for blowing out.
Further, body of heater 1 is also provided with the overfiren air port 108 that blasts oxygen-containing gas for the top to furnace chamber 11.Thus, superfluous CO and combustiblematerials in after-flame furnace gas, to guarantee that the safety of waste heat boiler and dust collecting system carries out.
In examples more of the present utility model, slag dam 22 lower ends are provided with the second passage 109 that is communicated with blowing 13He stripping section, district 14.Thus, be convenient to shut down melt in emptying stove.
Furnace chamber 11 diapires are anti-domes, by 12Xiang stripping section, melting area 14, tilt to put slope.Thus, be convenient to Flow of Goods and Materials.
The upper end of body of heater 1 is upwards drawn in and is formed mouth 102 gradually.For being connected with the membrane wall of waste heat boiler.
Body of heater 1 be provided with manhole and with the suitable manhole plate 16 of this manhole.
The height of the first gun slot 103 is lower than the liquid level in melting area 12, and the height of the second gun slot 104 is lower than the liquid level in blowing district 13.
Temperature in furnace chamber 11 is in the scope of 1100 degrees Celsius to 1350 degrees Celsius.Oxygen-rich concentration and temperature in melting area 12, blowing 13Ji stripping section, district 14 can regulate respectively, so that the processing efficiency of this continous way fuming furnace 100 reaches the highest.
The both sides of body of heater 1 are equipped with for connecting the gun slot of spray gun.Particularly, the both sides of melting area 12 are equipped with the first gun slot 103, and the both sides in blowing district 13 are equipped with the second gun slot 104.The first spray gun and the second spray gun are respectively a plurality of.
Spray gun is two channels spray gun, and wherein, the inner tube of spray gun is carried fine coal, and the outer tube of spray gun is carried oxygen-containing gas.
1050～1350 ℃ of bath temperature span of control, come out of the stove 1200～1400 ℃ of flue-gas temperatures of top.
According to the continuous fuming technique of the utility model embodiment, adopted the continous way fuming furnace according to the utility model previous embodiment, fuming technique comprises the following steps continuously: to fuming furnace addition material; In fuming furnace, blast oxygen-containing gas and fine coal; Reclaim the flue dust of metal oxide and discharge the waste in fuming furnace.
When liquid level is normally produced in continuous fuming furnace, always higher than spray gun (the first spray gun and the second spray gun), guarantee that spray gun, continuously in submerged state, adds warm sludge or cold burden to complete fusing, blowing, dilution technique to realize continuously.Flue gas, after waste heat recovery, enters dust collecting system output containing metal oxide flue dust.The waste of stripping section is sold outside regularly discharging after shrend.
Particularly, material adds behind the melting area of furnace chamber, material melts in melting area, and enter blowing district by first channel, and carry out reduction volatilization in blowing district, material reaction completes the residue of production in slag dam enters stripping section, waste from slag notch is discharged after entering dilution in stripping section.
According to the continuous fuming technique of the utility model embodiment, while normally producing, reinforced is continuous, and slagging is interrupted, only needs a control liquid level to fluctuate in allowed limits, just can make the operation that fuming furnace can be continuous.
According to an embodiment of the present utility model, this continuous fuming technique also comprises to the top in fuming furnace and blasts secondary air.Thus, make to be full of in furnace chamber oxygen-containing gas, thereby a part of compound or the metal in flue gas reduced, thereby be convenient to collect, reduce resources loss, improved the practicality of fuming furnace.
Certainly, the material of the volatile metals such as that continous way fuming furnace of the present utility model and continuously fuming technique can be processed is leaded, zinc, tin, as lead-zinc furnace cinder, zinc factory leached mud, medium tin ore etc.
Below the processing of the simple fuming furnace of describing a specific embodiment of the present utility model to lead-zinc furnace cinder.
In fact the fuming process of processing lead-zinc furnace cinder with fuming furnace makes reduction volatilization process, the mixture of reductive agent (fine coal etc.) and oxygen-containing gas (air etc.) is blasted the liquid slag of fuming furnace from primary air nozzle, make the plumbous zinc oxide in slag be reduced to lead, zinc fume, the plumbous oxide that vapour pressure is higher, lead sulfide also may directly volatilize with compound form, metallic vapor, metallic sulfide and oxide compound are with the upper space that enters body of heater together with flue gas, then the secondary air being blasted or furnace gas are oxidized to PbO and ZnO again, and be caught to combine in dust collection device, with tutty product, reclaim.In, Cd, Sn and part Ge also volatilize simultaneously, and are captured with ZnO.
Those of ordinary skills can be according to foregoing description, draws at an easy rate continous way fuming furnace of the present utility model or the process of fuming art breading zinc factory leached mud, medium tin ore etc. continuously, and the utility model is no longer elaborated.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.In addition, those skilled in the art can engage the different embodiment that describe in this specification sheets or example and combine.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in scope of the present utility model, modification, replacement and modification.
Claims (7)
1. a continous way fuming furnace, is characterized in that, comprising:
Body of heater, in described body of heater, there is furnace chamber, in described furnace chamber, be provided with for described furnace chamber being separated into partition wall and the slag dam of melting area, blowing district and stripping section, the lower end of described partition wall is provided with the first channel that is communicated with described melting area and described blowing district, described partition wall exceeds bath surface and described slag dam lower than bath surface, and described body of heater is provided with smoke outlet, the first gun slot, the second gun slot, for adding the charging opening of material and for discharge the slag notch of waste from described stripping section in described melting area; And
The first spray gun and the second spray gun, described the first spray gun is inserted in described the first gun slot, for spray into fine coal and oxygen-containing gas in described melting area, described the second spray gun is inserted in described the second gun slot, for spray into fine coal and oxygen-containing gas in described blowing district and described stripping section.
2. continous way fuming furnace according to claim 1, is characterized in that, described charging opening comprises for adding the heat material of heat material to add entrance to melting area and for add the cold burden of cold burden to add entrance to melting area.
3. continous way fuming furnace according to claim 1, is characterized in that, described heat material adds entrance and can seal on the sidewall that is located at described body of heater.
4. continous way fuming furnace according to claim 1, it is characterized in that, described slag notch comprises higher than the upper slag notch of described the first gun slot and the second gun slot and lower than the lower slag notch of described the first gun slot and the second gun slot, is also provided with the drain that approaches described furnace chamber diapire on described body of heater.
5. continous way fuming furnace according to claim 1, is characterized in that, described body of heater is also provided with the overfiren air port that blasts oxygen-containing gas for the top to described furnace chamber.
6. continous way fuming furnace according to claim 1, is characterized in that, described slag dam lower end is provided with the second passage that is communicated with described blowing district and described stripping section.
7. continous way fuming furnace according to claim 1, is characterized in that, furnace bottom is anti-domes, is tilted to put slope by melting area to stripping section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191744.1U CN203820868U (en) | 2014-04-18 | 2014-04-18 | Continuous fuming furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420191744.1U CN203820868U (en) | 2014-04-18 | 2014-04-18 | Continuous fuming furnace |
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| Publication Number | Publication Date |
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| CN203820868U true CN203820868U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420191744.1U Withdrawn - After Issue CN203820868U (en) | 2014-04-18 | 2014-04-18 | Continuous fuming furnace |
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| CN (1) | CN203820868U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937985A (en) * | 2014-04-18 | 2014-07-23 | 中国恩菲工程技术有限公司 | Continuous fuming furnace and continuous fuming process adopting continuous fuming furnace |
| CN109855426A (en) * | 2019-04-11 | 2019-06-07 | 袁汝平 | Two sections of side blown type smelting furnaces |
| CN114260297A (en) * | 2022-03-02 | 2022-04-01 | 中国恩菲工程技术有限公司 | Device and method suitable for fly ash melting and flue gas purification treatment |
-
2014
- 2014-04-18 CN CN201420191744.1U patent/CN203820868U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937985A (en) * | 2014-04-18 | 2014-07-23 | 中国恩菲工程技术有限公司 | Continuous fuming furnace and continuous fuming process adopting continuous fuming furnace |
| CN103937985B (en) * | 2014-04-18 | 2016-03-30 | 中国恩菲工程技术有限公司 | Continous way fuming furnace and adopt its continuous fuming technique |
| CN109855426A (en) * | 2019-04-11 | 2019-06-07 | 袁汝平 | Two sections of side blown type smelting furnaces |
| CN114260297A (en) * | 2022-03-02 | 2022-04-01 | 中国恩菲工程技术有限公司 | Device and method suitable for fly ash melting and flue gas purification treatment |
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Granted publication date: 20140910 Effective date of abandoning: 20160330 |
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