AU2021273581A1 - Burner and cyclone smelting method - Google Patents
Burner and cyclone smelting method Download PDFInfo
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- AU2021273581A1 AU2021273581A1 AU2021273581A AU2021273581A AU2021273581A1 AU 2021273581 A1 AU2021273581 A1 AU 2021273581A1 AU 2021273581 A AU2021273581 A AU 2021273581A AU 2021273581 A AU2021273581 A AU 2021273581A AU 2021273581 A1 AU2021273581 A1 AU 2021273581A1
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- feed rate
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- 238000003723 Smelting Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 428
- 239000000843 powder Substances 0.000 claims abstract description 220
- 238000006243 chemical reaction Methods 0.000 claims abstract description 160
- 239000007789 gas Substances 0.000 claims abstract description 126
- 239000012495 reaction gas Substances 0.000 claims abstract description 93
- 239000000567 combustion gas Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/02—Obtaining tin by dry processes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Cyclones (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Disclosed are a burner and a cyclone smelting method. The burner comprises a first
material passage and a second material passage for feeding powder material into a reaction
shaft; and a gas passage for supplying reaction gas into the reaction shaft, wherein the gas
passage, the first material passage and the second material passage are sleeve coupled. When
the feed rate of the powder material is not higher than the first target feed rate, the powder
material is fed into the reaction shaft through the first material passage or the second material
passage, and when the feed rate of the powder material is higher than the first target feed rate,
the powder material is fed into the reaction shaft through the first material passage and the
second material passage. The burner can feed the powder material through the corresponding
material passage based on different material feed rates, so as to be able to ensure the velocity
e of the powder material while avoiding the blockage of the material passages, thereby
improving the mixing and reaction effect between the powder material with different feed
rates and the reaction gas in the reaction shaft of the smelting furnace.
1/2
. 4
6
Figure 1
Description
1/2
. 4
6
Figure 1
[0001] The present disclosure relates to the field of metallurgical technology, and in particular to the production technology of non-ferrous metals, and more particularly to a burner. The present disclosure further relates to a cyclone smelting method.
[0002] In the field of non-ferrous metal pyrometallurgical smelting technology, many of the raw materials are sulfide concentrates. The smelting process is mainly to disperse the concentrate into powder material and feed the powder material together with a reaction gas to the concentrate burner in the upper part of the high-temperature reaction shaft of the smelting furnace for mixing. With the oxidation reactions of the sulfide in the concentrate with the reaction gas, the metal is separated from the impurities in the concentrate.
[0003] At present, the burner in the reaction shaft feeds the powder material through a material passage and supplies the reaction gas through a gas passage. The mixing effect between the powder material and the reaction gas is improved by generating a center distribution air and swirling flow from the reaction gas. However, when the feed rate of powder material into the reaction shaft is low, the velocity of the powder material in the material passage is low, which will affect the mixing and reaction effect between the powder material and the reaction gas. When the feed rate of powder materials into the reaction shaft is relatively high, it is more likely that the powder material will block the material passage, which will also affect the mixing and reaction effect between the powder material and the reaction gas.
[0004] The present disclosure is directed to a burner that may improve the mixing and reaction effect between the reaction gas and powder material with different feed rate in the
reaction shaft of the smelting furnace.
[0005] The present disclosure is also directed to a cyclone smelting method that may improve the mixing and reaction effect between the reaction gas and powder material with different feed rate in the reaction shaft of the smelting furnace.
[0006] In a first aspect of the invention, there is provided a burner, comprising: a first material passage and a second material passage for feeding powder material into a reaction shaft of a smelting furnace; and a gas passage for supplying reaction gas into the reaction tower, wherein the gas passage, the first material passage and the second material passage are sleeve coupled, wherein, when the feed rate of the powder material is not higher than a first target feed rate, the powder material is fed into the reaction shaft through the first material passage or the second material passage, when the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage and the second material passage.
[0007] There is also disclosed a burner ,comprising: a first material passage and a second material passage for feeding powder material into a reaction shaft of a smelting furnace; and a gas passage for supplying reaction gas into the reaction shaft, wherein the gas passage, the
first material passage and the second material passage are of muff-coupling structure, wherein, when the feed rate of the powder material is not higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage or the second material passage, when the feed rate of the powder material is higher than the first target feed
rate, the powder material is fed into the reaction shaft through the first material passage and the second material passage.
[0008] Preferably, the cross-sectional area of the second material passage is lower than that of the first material passage, wherein, when the feed rate of the powder material is not higher than the second target feed rate, the powder material is fed into the reaction shaft through the second material passage, wherein the second target feed rate is lower than the first target feed rate, when the feed rate of the powder material is between the second target feed rate and the
first target feed rate, the powder material is fed into the reaction shaft through the first material passage.
[0009] Preferably, when the powder material is fed into the reaction shaft through the first material passage and the second material passage, the amount of powder material fed into the reaction shaft through the second material passage accounts for 0-30% of the total amount of material.
[0010] Preferably, the gas passage is provided with a swirling device for generating a swirling flow in the reaction gas, the swirling device comprises at least two tangential air intake
passages evenly distributed along the circumferential direction of the gas passage, which are tangentially arranged on the outer wall of the inlet of the gas passage and provided with an air intake control valve thereon.
[0011] Preferably, the swirling device further comprises: a plurality of air-guide vanes arranged in the middle and/or at the outlet of the gas passage, wherein the angle between the air-guide vanes and the horizontal direction is 30°-70°.
[0012] Preferably, the gas passage comprises: a first gas passage for supplying a first reaction gas into the reaction shaft; a second gas passage for supplying a second reaction gas into the reaction shaft, wherein the cross-sectional area of the second gas passage is lower than that of the first gas passage, and both the first gas passage and the second gas passage are provided with the swirling device; wherein among the first gas passage, the second gas passage, the
first material passage and the second material passage, the gas passages and the material passages are sleeve coupled at interval.
[0013] Preferably, the second gas passage, the second material passage, the first gas passage and the first material passage are sequentially sleeve coupled from inside to outside.
[0014] Preferably, a combustion gas passage for supplementing reaction heat is provided inside the second gas passage, wherein the combustion gas passage is composed of by a center pipe, the cross-sectional shapes of the second gas passage, the second material passage,
the first gas passage and the first material passage are all annular, which are formed by cooperating of multiple sleeves with radial interval and being sleeve coupled.
[0015] Preferably, the outlet of the second gas passage is divergent; the outlets of the first gas passage and the first material passage are convergent.
[0016] As can be seen from above, the burner provided by the present disclosure comprises a first material passage and a second material passage, through which the powder material is
fed into the reaction shaft of the smelting furnace, a gas passage for supplying reaction gas into the reaction shaft of the smelting furnace, wherein the gas passage, the first material passage and the second material passage are of muff-coupling structure, wherein, when the feed rate of the powder material is not higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage or the second material passage, when the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage and the second material passage.
[0017] Embodiments of the burner provided by the present disclosure may be used to feed powder material and reaction gas into a high-temperature reaction shaft for reaction, so that when the feed rate of the powder material is not higher than the first target feed rate, that is, the feed rate of the powder material is relatively small, the powder material is fed into the reaction shaft through the first material passage or the second material passage, which may ensure the flow rate of the powder material in the material passage and thus may improve the mixing and reaction effect of the powder material and the reaction gas, and when the feed rate of the powder material is higher than the first target feed rate, that is, the feed rate of the powder material is relatively large, the powder material is fed into the reaction shaft through the first material passage and the second material passage simultaneously, which may prevent the material passage from being blocked and also may improve the mixing and reaction effect between the powder material and the reaction gas.
[0018] In summary, at least preferred embodiments of the burner provided by the present disclosure can feed the powder material through the corresponding material passage based on different material feed rate, so as to be able to ensure the flow rate of the powder material while potentially avoiding the blockage of the material passages, thereby potentially improving the mixing and reaction effect between the powder material with different feed rate and reaction gas in the reaction shaft of the smelting furnace.
[0019] In addition, at least preferred embodiments of the burner have a large capacity and are suitable for a variety of feed rates of the powder material, and can be used to treat various material compositions including high-impurity powder materials, and have the potential advantages of high oxygen utilization rate and sufficient reaction.
[0020] The present disclosure further provides a cyclone smelting method, where the applied smelting furnace adopts any one of above-mentioned burners. For the cyclone smelting method, the powder material is fed into the reaction shaft of the smelting furnace through the material passage or the second material passage when the feed rate of powder materials is not higher than the first target feed rate, and the powder material is fed into the reaction shaft through the material passage and the second material passage when the feed rate of powder materials is higher than the first target feed rate.
[0021] Embodiments of the cyclone smelting method provided by the present disclosure are used to feed powder material and reaction gas into a high-temperature reaction shaft for
reaction, when the feed rate of the powder material is not higher than the first target feed rate, that is, the feed rate of the powder material is relatively small, the powder material is feed into the reaction shaft through the first material passage or the second material passage, which may ensure the flow rate of the powder material in the material passage and may improve the
mixing and reaction effect of the powder material and the reaction gas, and when the feed rate of the powder material is higher than the first target feed rate, that is, the feed rate of the powder material is relatively large, the powder material is fed into the reaction shaft through
the first material passage and the second material passage simultaneously, which may prevent the material passage from being blocked and also may improve the mixing and reaction effect between the powder material and the reaction gas.
[0022] In summary, for at least preferred embodiments of the cyclone smelting method provided by the present disclosure, the powder material can be fed through the corresponding material passage based on different material feed rates, so as to be able to ensure the flow rate of the powder material while potentially avoiding the blockage of the material passages,
thereby potentially improving the mixing and reaction effect between the powder material with different feed rate and reaction gas in the reaction shaft of the smelting furnace.
[0023] In addition, at least preferred embodiments of the cyclone smelting method are suitable for a variety of feed rate of powder material and are able to treat various material
compositions including high-impurity powder materials, and may have the potential advantages of high oxygen utilization rate and sufficient reaction.
[0024] The drawings to be used in the description of the embodiments of the disclosure or the conventional technology will be described briefly as follows, so that the technical solutions
according to the embodiments of the present disclosure or according to the conventional technology will become clearer. It is apparent that the drawings in the following description only illustrate some embodiments of the present disclosure. For those skilled in the art, other drawings may be obtained according to these drawings without any creative work.
[0025] FIG. 1 is a schematic structural view of a burner disclosed in an embodiment of the present disclosure;
[0026] FIG. 2 is a partial structural cross-section view of a burner at the outlet of the first gas passage disclosed in an embodiment of the present disclosure.
[0027] In the embodiments of the present disclosure, disclosed is a burner, which improves the mixing and reaction effect between the reaction gas and powder material with different feed rates.
[0028] In order to make the object, technical solutions and advantages of the present disclosure clearer, technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Apparently, the embodiments described in the following are only some embodiments of the present disclosure rather than all the embodiments. Any other embodiments obtained by those skilled in the art based on the embodiments in the present disclosure without any creative effort fall within the protection scope of the present disclosure.
[0029] Referring to FIG.1 and 2, the burner provided by an embodiment of the present disclosure comprises a first material passage 1 and a second material passage 3, and a gas passage for supplying reaction gas into the reaction shaft, wherein the gas passage, the first material passage 1 and a second material passage 3 are sleeve coupled; wherein, when the feed rate of the powder material is not higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1 or the second material passage 3, when the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3.
[0030] It should be noted that the term "powder material" herein refers to a dry material containing copper, nickel, lead and/or zinc.
[0031] The burner provided by the present disclosure is used to feed powder material and reaction gas into a high-temperature reaction shaft for reaction, so that when the feed rate of the powder material is not higher than the first target feed rate, that is, the feed rate of the powder material is low, the powder material is fed into the reaction shaft through the first material passage 1 or the second material passage 3, which may ensure the velocity of the powder material in the material passage and thus improve the mixing and reaction effect between the powder material and the reaction gas, and when the feed rate of the powder material is higher than the first target feed rate, that is, the feed rate of the powder material is high , the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3 simultaneously, which avoids the material passage being blocked and also improve the mixing and reaction effect between the powder material and the reaction gas.
[0032] To sum up, the burner provided by the present disclosure can feed the powder material through the corresponding material passage according to different feed raterate so as to ensure the velocity of the powder material while avoiding the blockage of the material passage, thereby improving the mixing and reaction effect between the powder material with different feed rates and the reaction gas in the reaction shaft of the smelting furnace.
[0033] In addition, the burner, which has a large capacity and is suitable for a variety of feed rates of powder material, may be used to treat various material compositions including high impurity powder materials, and has the advantages of high oxygen utilization rate and sufficient reaction.
[0034] In a preferred embodiment, the cross-sectional area of the second material passage 3 is lower than that of the first material passage, wherein, when the feed rate of the powder material is not higher than the second target feed rate, the powder material is fed into the reaction shaft through the second material passage 3, wherein the second target feed rate is smaller than the first target feed rate; and when the feed rate of the powder material is between the second target feed rate and the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1.
[0035] In the present disclosure, when the feed rate of the powder material is not higher than the first target feed rate, there will be two situations based on the second target feed rate. When the feed rate of the powder material is not higher than the second target feed rate, the powder material is fed into the reaction shaft through the second material passage 3 with a smaller cross-sectional area, and then the flow rate of the powder material in the material passage is raised, and the mixing and reaction effect of the powder material and the reaction gas is improved. When the feed rate of the powder material is higher than the second target feed rate and lower than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1. When the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3.
[0036] Specifically, the second target feed rate is set to 80t/h, and the first target feed rate is set to 300t/h. When the amount of powder material fed into the reaction shaft is not higher than 80t/h, it may meet the production conditions by feeding the powder material into the reaction shaft only through the second material passage 3. When the amount of powder material fed into the reaction shaft is between 80t/h ~ 300t/h, it may meet the production conditions by feeding the powder material into the reaction shaft only through the first material passage 1. When the amount of powder materials fed into the reaction shaft is higher than 300t/h, the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3 simultaneously.
[0037] Of course, according to actual application conditions, the two target feed rates may also be other values, which are not specifically limited by the present disclosure.
[0038] In the present disclosure, it should be understood that the powder material is fed to the reaction shaft all through the second material passage 3 when the feed amount is not higher than the first target feed rate.
[0039] To ensure the reaction effect and ensure sufficient reaction and high oxygen utilization rate, when the powder material is fed into the reaction shaft through thefirst material passage 1 and the second material passage 3, the amount proportion of powder material fed into the reaction shaft through the second material passage 3 accounts for 0-30% of the total amount of the material. In this embodiment, when the amount of powder material fed into the reaction shaft is relative high, in particularly, when the amount of powder material is higher than the second target feed rate, the amount of powder material fed into the reaction shaft through the second material passage 3 accounts for 0-30% of the total amount of the material, which avoids too much powder material being fed through the second material passage 3 so as cause the reaction gas not to be able to effectively disperse the powder material fed through the second material passage 3, and thus results in uneven mixing and poor reaction effect.
[0040] The gas passage is provided with a swirling device 6 for generating a swirling flow from the reaction gas. The swirling device 6 can be arranged at any one of the inlet, middle part and outlet of the gas passage, and the same effect is achieved.
[0041] To improve and ensure the swirling effect of the reaction gas, the swirling device 6 may be positioned in the bottom of the gas passage and at the outlet of the gas passage at the same time, or may be positioned in the middle of the gas passage and at the outlet of the gas passage at the same time.
[0042] The swirling device 6 used is different for different mounting positions. In case of being provided at the inlet of the gas passage, the swirling device 6 comprises at least two tangential air intake passages evenly distributed along the circumferential direction of the gas passage, which are tangentially arranged on the outer wall of the inlet of the gas passage, and are provided with an air intake control valve thereon. Specifically, there are two or four tangential air intake passages. Of course, other numbers are possible as long as it ensures the intake of gas being uniform around the whole circumference of the gas passage. It generates the swirl flow as the reaction gas entering the gas passage along the tangential direction of the gas passage.
[0043] In case that the swirling device 6 is positioned in the middle or the outlet of the gas passage, the swirling device 6 comprises a plurality of air-guide vanes 61 arranged in the middle and/or at the outlet of the gas passage. As shown in FIG.2, the gas can be supplied through the gas passage in the axial direction of the gas passage or through at least two tangential air intake passages evenly distributed along the circumferential direction of the gas passage so as to superimpose the swirling effect.
[0044] In case that the air-guide vanes 61 are arranged at the outlet of the gas passage, the gas passage directly outputs the swirling flow through a plurality of rotary cutting outlets formed by the air-guide vanes 61.
[0045] To ensure that the generated swirling flow meets the process requirements, the angle between the air-guide vanes 61 and the horizontal direction is 30°-70°.
[0046] To ensure the mixing effect of the reaction gas and the powder material, the gas passage comprises a first gas passage 2 for supplying a first reaction gas into the reaction shaft and a second gas passage 4 for supplying a second reaction gas into the reaction shaft and forming the first reaction gas into radial diffusion air. The cross-sectional area of the second gas passage 4 is lower than the cross-sectional area of the first gas passage 2. The first gas passage 2 and the second gas passage 4 are both provided with the above-mentioned swirling devices 6, wherein, for the first gas passage 2, the second gas passage 4, the first material passage 1 and the second material passage 3, the gas passages and the material passages are sleeve coupled at interval.
[0047] In order to better control and distribute the amount of reaction gas in the first gas passage 2 and the second gas passage 4, the first reaction gas and the second reaction gas are the same gas.
[0048] In the present disclosure, the second reaction gas can be mixed and react with the powder material fed through the second material passage 3 by the expansion of the second reaction gas in form of swirling flow, and the generated expansion pushes the first reaction gas that enters through the first gas passage 2 to spin and move around at high speed so as to entraining the powder material fed through the first material passage 1, which causes the rapidly mixing reaction of the first reaction gas with the powder material fed through the first passage. Meanwhile, the reaction heat released by the reaction between the second reaction gas and the powder material fed through the second material passage 3 increases the temperature at the top of center of the swirling fluid, and shift the starting point of the swirling fluid upward, thereby extending the time of the reactions between the reaction gas and the powder material and between the powder materials so as to make the reaction in the reaction shaft more complete.
[0049] In case of low feeding rate, the powder material can be fed only through the second material passage 3, which can also bring a good mixing reaction effect, and it is not necessary to consider the influence to the effect of the swirling caused by the small volume of the first reaction gas when the federate of the powder material is low, which cannot obtain a good mixing effect. When the amount of fed powder material is exceeded, the second material passage 3 can disperse the pressure of the single material feeding passage. Importantly, the reaction between the second reaction gas and the powder material that enters through the second material passage 3 plays a key role with respect to promoting the radial movement of the first reaction gas, supplementing the intermediate reaction heat so as to improve the intermediate reaction and shift the overall reaction point upward, thereby extending the reaction path of the powder material, that is, the reaction time, so as to promote the mixing and reaction between the reaction gas and the powder material and between the powder materials.
[0050] During the actual application, when the feed rate of powder material into the reaction shaft is not higher than 80t/h, the powder material is fed into the reaction shaft only through the second material passage 3, and the reaction gas is supplied into the reaction shaft through the first gas passage 2 and the second gas passage 4, and the powder material and the reaction gas can be fully mixed. Under the action of high temperature, the powder material and the reaction gas react rapidly.
[0051] Herein, the second reaction gas which is sprayed into the reaction shaft through the second gas passage 4 rapidly expands, causing the powder material that enters the reaction shaft around the second gas to move around. Meanwhile, the first reaction gas generated in the first gas passage 2 is in swirling state and drags the powder material into the swirling gas to form a swirling fluid. Under the action of the first reaction gas and the second reaction gas, the reaction gas and the powder material are rapidly and fully mixed and react so as to produce a high-temperature melt/ molten droplets and high-temperature flue gas, and then the high-temperature melt/ molten droplets fall into the sedimentation tank at the bottom of the smelting furnace for separation, and high-temperature flue gas is discharged into the flue gas treatment system through the flue gas passage.
[0052] When the feed rate of powder material is further increased, that is, when the feed rate of powder material into the reaction shaft is higher than 80t/h, additional powder material is fed into the reaction shaft through the material passage 1 without increasing the amount of the power material fed through the second material passage 3. The corresponding amount of reaction gas is supplied into the reaction shaft through the first gas passage 2 and the second gas passage 4 together, and the supply amount of the reaction gas through the first gas passage 2 and the second gas passage 4 is adjusted by the air inlet control valve according to the feed rate of material so as to meet the requirement of oxygen amount for the mixing and reaction of the powder material and the reaction gas under different working conditions. Under the action of high temperature, the powder material rapidly reacts with the reaction gas.
[0053] Herein, the second reaction gas sprayed into the reaction shaft through the second gas passage 4 rapidly expands, causing the powder material that enter the reaction shaft around the second gas to move around, the powder material is fed into reaction shaft through the first
material passage 1, and the first reaction gas generated in the first gas passage 2 is in swirling state and drags the powder material fed through the first material passage 1 and the second material passage 3 into the swirling gas to form a swirling fluid. Under the action of the first reaction gas and the second reaction gas, the reaction gas and the powder material are rapidly
and fully mixed and react to produce a high-temperature melt/ molten droplets and high temperature flue gas, and the high-temperature melt/ molten droplets fall into the sedimentation tank at the bottom of the smelting furnace for separation, and high-temperature flue gas is discharged into the flue gas treatment system through the flue gas passage.
[0054] It should be understood that, when a certain proper amount of the powder material is fed into the reaction tower, specifically, when the feed rate of powder material is 80 t/h300 t/h, it is possible that only the first material passage 1 is used to feed the powder material and only the first gas passage 2 is used to supply the reaction gas, and the first reaction gas enters the reaction shaft in form of swirling flow and entrains the powder material around the first reaction gas to form swirling fluid with gas and powder material being fully mixed. Under the action of high temperature, the reaction gas rapidly reacts with the powder material, and finally enters the bottom space of the smelting furnace. When the feed rate of powder material exceeds 300 t/h, the first material passage 1 and the second material passage 3 are used to feed the powder material, and the first gas passage 2 and the second gas passage 4 are used to supply the reaction gas, which satisfies the production conditions under the high feeding rate with good reaction effect, high oxygen utilization rate, and sufficient reaction.
[0055] As shown in Fig. 1, the second gas passage 4, the second material passage 3, the first gas passage 2 and the first material passage 1 are sequentially sleeve coupled from inside to outside. The upper inlets of the first material passage 1, the first gas passage 2, the second material passage 3, the second gas passage 4, and the combustion gas passage 5 are independent without communication with each other, and the lower outlets thereof are all located in the reaction tower. At this time, the swirling flow generated in the second gas passage 4 also has a central diffusion air, which causes the outward expansion of the powder material surrounding the second reaction gas that enters the reaction tower, and the swirling flow generated by the first gas passage 2 is located between two material passages, which drags the powder material entered through two material passages together to form a swirling fluid so as to ensure the reaction gas and the powder material are rapidly and fully mixed and reacted.
[0056] It should be understood that the above-mentioned second gas passage 4 can also be arranged on the outermost side, and the second reaction gas can be diffused inwardly by providing an outlet directed inwardly. Correspondingly, the second material passage 3, the first gas passage 2 and the first material passage 1 are sequentially sleeve coupled from outside to inside. Of course, the positions of the first material passage 1 and the second material passage 3 can also be exchanged.
[0057] In order to supplement insufficient reaction heat and remedy for undesirable mixing effort in case of the feed rate of powder material being small through the second material passage 3 and supplement the reaction heat when the smelting furnace is heated or in heat preservation before feeding, a combustion gas passage 5 is provided inside the second gas passage 4.
[0058] In this embodiment, the combustion gas passage 5 is composed of a central pipe. The cross-sectional shapes of the second gas passage 4, the second material passage 3, the first gas passage 2 and the first material passage 1 are all annular, which are formed by cooperating of multiple sleeves with radial interval and being sleeve coupled. In the present disclosure, the combustion gas passage 5 is formed by a central pipe, and the gas passage and the material passage are formed by the spaces which are formed by the gaps between two adjacent sleeves and the gaps between the sleeves and the central pipe. The structure is simple and facilitates processing. Of course, the above-mentioned passages can also be formed by punching.
[0059] To ensure that a sufficient amount of second reaction gas entering the reaction shaft through the second gas passage 4 can be radially diffused around, the outlet of the second gas passage 4 is divergent; the second gas passage 4 causes the second reaction gas to be diffused outward through the divergent outlet, thereby improving the mixing effect of the reaction gas and the powder material.
[0060] Furthermore, the outlets of the first gas passage 2 and the first material passage 1 are convergent. The first gas passage 2 and the first material passage 1 cause the first reaction gas and the powder material entering through the first material passage 1 to be gathered inward by the convergent outlets, thereby improving the mixing effect of the first reaction gas, the second reaction gas and the powder material.
[0061] The burner disclosed in the present disclosure has a simple structure, facilitates processing with low failure rate and high operation efficiency.
[0062] The embodiment of the present disclosure further discloses a cyclone smelting method. The applied smelting furnace adopts the burner provided in any one of the above-mentioned embodiments. In the cyclone smelting method, the powder material is fed into the reaction shaft of the smelting furnace through the material passage 1 or the second material passage 3 when the feed rate of powder material is not higher than the first target feed rate, and the powder material is fed into the reaction shaft through the material passage 1 and the second material passage 3 when the feed rate of powder material is higher than the first target feed rate.
[0063] In the cyclone smelting method used for supplying powder material and reaction gas into a high-temperature reaction shaft for reaction provided by the present disclosure, when the feed rate of the powder material is not higher than the first target feed rate, that is, the feed rate of the powder material is small, the powder material is feed into the reaction shaft through the first material passage 1 or the second material passage 3, which may ensure the flow rate of the powder material in the material passage and improve the mixing and reaction effect of the powder material and the reaction gas, and when the feed rate of the powder material is higher than the first target feed rate, that is, the feed rate of the powder material is relative large, the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3 simultaneously, which avoid the material passage being blocked and also improve the mixing and reaction effect of the powder material and the reaction gas.
[0064] In summary, in the cyclone smelting method provided by the present disclosure, the powder material can be fed through the corresponding material passage based on different material feed rates, so as to be able to ensure the flow rate of the powder material while avoiding the blockage of the material passages, thereby improving the mixing and reaction effect of powder material with different feed rates and reaction gas in the reaction shaft of the smelting furnace.
[0065] In addition, the cyclone smelting method is suitable for a variety of feed rates of powder material and is able to deal with various material compositions including high impurity powder materials, and has the advantages of high oxygen utilization rate and sufficient reaction.
[0066] In a preferred embodiment, in the cyclone smelting method disclosed in the present disclosure, the powder material is fed into the reaction shaft through the second material passage 3 when the powder material is not higher than the second target feed rate; the powder material is fed into the reaction shaft through the first material passage 1 when the feed rate of the powder material is between the second target feed rate and the first target feed rate; and the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3 when the feed rate of the powder material is higher than the first target feed rate, wherein the second target feed rate is lower than the first target feed rate.
[0067] When the feed rate of the powder material is not higher than the first target feed rate, there will be two situations based on the second target feed rate in the present disclosure. When the feed rate of the powder material is not higher than the second target feed rate, the powder material is fed into the reaction shaft through the second material passage 3 with a smaller cross-sectional area, thereby the flow rate of the powder material in the material passage is raised, and the mixing and reaction effect of the powder material and the reaction gas is improved. When the feed rate of the powder material is higher than the second target feed rate and lower than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1. When the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage 1 and the second material passage 3.
[0068] Specifically, the second target feed rate is set to 80t/h, and the first target feed rate is set to 300t/h. When the amount of powder material fed into the reaction shaft is not higher than 80t/h, it may meet the production conditions by feeding the powder material into the reaction shaft only through the second material passage 3. When the amount of powder
materials fed into the reaction shaft is between 80t/h ~ 300t/h, it may meet the production conditions by feeding the powder material into the reaction shaft only through the first material passage 1. When the amount of powder material fed into the reaction shaft is higher than 300t/h, the powder material is fed into the reaction shaft through the first material
passage 1 and the second material passage 3 simultaneously.
[0069] Of course, according to actual application conditions, said two target feed rates may also be other values, which are not specifically limited by the present disclosure.
[0070] It should be understood that all powder material can be fed to the reaction shaft through the second material passage 3 when the feed rate is not higher than the first target feed rate in the present disclosure.
[0071] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other.
[0072] According to the above description of the disclosed embodiments, those skilled in the art can implement or practice the present disclosure. Many changes to these embodiments are apparent for those skilled in the art, and general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments disclosed herein, but is to conform to the widest scope in accordance with the principles and novel features disclosed herein.
[0073] Reference to any prior art in the specification is not an acknowledgement or suggestion that this prior art forms part of the common general knowledge in any jurisdiction or that this prior art could reasonably be expected to be combined with any other piece of prior art by a skilled person in the art.
[0074] By way of clarification and for avoidance of doubt, as used herein and except where the context requires otherwise, the term "comprise" and variations of the term, such as "comprising", "comprises" and "comprised", are not intended to exclude further additions, components, integers or steps
Claims (10)
- CLAIMS 1. A burner, comprising: a first material passage and a second material passage for feeding powder material into a reaction shaft of a smelting furnace; and a gas passage for supplying reaction gas into the reaction tower, wherein the gas passage, the first material passage and the second material passage are sleeve coupled, wherein, when the feed rate of the powder material is not higher than a first target feed rate, the powder material is fed into the reaction shaft through the first material passage or the second material passage, when the feed rate of the powder material is higher than the first target feed rate, the powder material is fed into the reaction shaft through the first material passage and the second material passage.
- 2. The burner according to claim 1, wherein the cross-sectional area of the second material passage is lower than that of thefirst material passage, wherein, when the feed rate of the powder material is not higher than a second target feed rate, the powder material is fed into the reaction shaft through the second material passage, and the second target feed rate is lower than the first target feed rate, when the feed rate of the powder material is between the second target feed rate and the first target feed rate, the powder material is fed into the reaction shaft through the first material passage.
- 3. The burner according to claim 1 or 2, wherein when the powder material is fed into the reaction shaft through the first material passage and the second material passage, the amount of powder material fed into the reaction shaft through the second material passage accounts for 0-30% of the total amount of the material.
- 4. The burner according to any one of the preceding claims, wherein the gas passage is provided with a swirling device for generating a swirling flow in the reaction gas, the swirling device comprises at least two tangential air intake passages evenly distributed along the circumferential direction of the gas passage, which are tangentially arranged on the outer wall of the inlet of the gas passage and provided with an air intake control valve thereon.
- 5. The burner according to claim 4, wherein the swirling device further comprises: a plurality of air-guide vanes arranged in the middle and/or at the outlet of the gas passage, wherein the angle between the air-guide vanes and the horizontal direction is 30°-70°.
- 6. The burner according to claim 4 or 5, wherein the gas passage comprises: a first gas passage for supplying a first reaction gas into the reaction tower; and a second gas passage for supplying a second reaction gas into the reaction tower, wherein the cross-sectional area of the second gas passage is lower than that of the first gas passage, and both the first gas passage and the second gas passage are provided with a swirling device; wherein, among the first gas passage, the second gas passage, the first material passage and the second material passage, the gas passages and the material passages are sleeve coupled at interval.
- 7. The burner according to claim 6, wherein the second gas passage, the second material passage, the first gas passage and the first material passage are sequentially sleeve coupled from inside to outside.
- 8. The burner according to claim 7, wherein a combustion gas passage for supplementing reaction heat is provided inside the second gas passage, wherein the combustion gas passage is composed of a central pipe, and the cross sectional shapes of the second gas passage, the second material passage, the first gas passage and the first material passage are all annular, which are formed by cooperating of multiple sleeves with radial interval and being sleeve coupled.
- 9. The burner according to claim 7 or 8, wherein the outlet of the second gas passage is divergent; the outlets of the first gas passage and thefirst material passage are convergent.
- 10. A cyclone smelting method, wherein a smelting furnace used in said method adopts the burner according to any one of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011349345.XA CN112595125A (en) | 2020-11-26 | 2020-11-26 | Nozzle and suspension smelting method |
| CN202011349345.X | 2020-11-26 |
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| AU2021273581A1 true AU2021273581A1 (en) | 2022-06-09 |
| AU2021273581B2 AU2021273581B2 (en) | 2023-08-24 |
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| AU2021273581A Active AU2021273581B2 (en) | 2020-11-26 | 2021-11-24 | Burner and cyclone smelting method |
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| CN (1) | CN112595125A (en) |
| AU (1) | AU2021273581B2 (en) |
| RS (1) | RS20211265A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121711A (en) * | 1994-10-19 | 1996-05-17 | Hitachi Ltd | Pulverized coal combsition method and pulverized coal combustion device and pulverized coal burner |
| KR101032511B1 (en) * | 2009-06-04 | 2011-05-04 | 주식회사 포스코 | Powder Flux Controlling Apparatus and Method Using Detecting Microwave and Static Electricity |
| CN201964776U (en) * | 2011-03-09 | 2011-09-07 | 江西广信铜业有限公司 | Scrap copper feeding device for up-drawing furnace |
| CN102519260A (en) * | 2011-12-31 | 2012-06-27 | 阳谷祥光铜业有限公司 | Cyclone smelting spray nozzle and smelting furnace |
| CN102748137B (en) * | 2012-07-18 | 2015-06-17 | 深圳智慧能源技术有限公司 | Fuel control system of gas turbine |
| CN104677105A (en) * | 2015-02-25 | 2015-06-03 | 内蒙古鄂尔多斯电力冶金股份有限公司氯碱化工分公司 | Reducing furnace |
| CN105112684A (en) * | 2015-10-05 | 2015-12-02 | 杨伟燕 | Suspension smelting nozzle |
| CN211695893U (en) * | 2020-03-06 | 2020-10-16 | 福州严创环境科技有限公司 | Feeding device for steel-making furnace |
-
2020
- 2020-11-26 CN CN202011349345.XA patent/CN112595125A/en active Pending
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2021
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| CN112595125A (en) | 2021-04-02 |
| RS20211265A1 (en) | 2022-10-31 |
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