AU2017266791B2 - Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal - Google Patents
Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal Download PDFInfo
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- AU2017266791B2 AU2017266791B2 AU2017266791A AU2017266791A AU2017266791B2 AU 2017266791 B2 AU2017266791 B2 AU 2017266791B2 AU 2017266791 A AU2017266791 A AU 2017266791A AU 2017266791 A AU2017266791 A AU 2017266791A AU 2017266791 B2 AU2017266791 B2 AU 2017266791B2
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- pulverized coal
- lance
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- coal
- injection
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- 239000003245 coal Substances 0.000 title claims abstract description 223
- 238000003723 Smelting Methods 0.000 title claims abstract description 114
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000001301 oxygen Substances 0.000 title claims abstract description 23
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 23
- 238000005507 spraying Methods 0.000 title claims abstract description 13
- 230000000712 assembly Effects 0.000 claims abstract description 35
- 238000000429 assembly Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims description 121
- 239000007924 injection Substances 0.000 claims description 121
- 238000004891 communication Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 239000000112 cooling gas Substances 0.000 claims description 16
- 239000012535 impurity Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007921 spray Substances 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 description 10
- 239000007789 gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000009776 industrial production Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/16—Arrangements of tuyeres
-
- 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
- F27D3/16—Introducing a fluid jet or current into the charge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A side-submerged combustion smelting apparatus (1) for spraying oxygen-enriched air and pulverized coal, comprising: a smelting furnace (100); a pulverized coal delivery pipe (200) for delivering pulverized coal; an air delivery pipe (300) for delivering oxygen-enriched air; a plurality of coal spray assemblies (400) arranged at intervals on two opposite walls of the smelting furnace (100), each coal spray assembly (400) comprising a pulverized coal spay gun (410) and an air spray gun (420) that are adjacent to each other and disposed as a pair, each coal spray assembly (400) at least partially extending into the smelting furnace (100).
Description
The present disclosure relates to a technical field of metallurgy. To be specific, it
involves a side-submerged combustion smelting apparatus with the blowing of oxygen-enriched
air and pulverized coal.
BACKGROUND A side-submerged combustion (SSC) smelting process is to inject oxygen-enriched air
and gaseous fuel into a molten bath through the tuyeres or lances on both sides of a smelting
furnace, and the injected gas stirs the molten bath to accelerate heat and mass transfer and
chemical reaction in the molten bath. The SSC smelting process is widely used in the field of
non-ferrous metal treatment (such as lead smelting, zinc slag smelting, copper smelting, etc.)
and solid waste treatment.
If the side-submerged combustion smelting apparatus in the related art employs natural
gas, coke oven gas, and producer gas as fuels, fuel gas cannot be economically used in fuel
gas-deficient regions, which limits the applicability of side-submerged combustion
technology.
If the side-submerged combustion smelting apparatus in the related technology employs
pulverized coal as fuel, the pulverized coal and air are mixed within the lance or the tuyere.
Therefore, the oxygen concentration in the air cannot be too high to ensure safety, thus
causing the hearth area efficiency and thermal efficiency to fail to adapt to the needs of
current development of non-ferrous metal smelting industry and fail to achieve large-scale
industrial production.
The present disclosure aims to solve at least one of technical problems in the related art
to a certain extent. Accordingly, the present disclosure provides a side-submerged combustion
smelting apparatus for spraying oxygen-enriched air and pulverized coal. The side-submerged
combustion smelting apparatus uses the pulverized coal as a fuel, and thus has advantages of
I high productivity, low operating cost, and wide applicability.
To achieve above objectives, the embodiments in the present disclosure provide a side submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized
coal. The side-submerged combustion smelting apparatus includes: a smelting furnace, a
pulverized coal delivery pipe configured to deliver the pulverized coal, an air delivery pipe configured to deliver the oxygen-enriched air and communicated with an air source, and a
plurality of coal injection assemblies arranged at intervals on two opposite side walls of the
smelting furnace in which each coal injection assembly includes a pulverized coal lance and an air lance adjacent to each other and arranged as a pair, each pulverized coal lance being in
communication with the pulverized coal delivery pipe, and each air lance being in
communication with the air delivery pipe, and each coal injection assembly at least partially extends into the smelting furnace.
The side-submerged combustion smelting apparatus in the embodiments of the present
disclosure can use the pulverized coal as fuel and thus has advantages of the high productivity, the low operating cost, and the wide applicability.
In addition, the side-submerged combustion smelting apparatus based on the above
embodiments in the present disclosure can also have the following additional technical features. According to an embodiment of the present disclosure, there is provided a side .O submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal comprising: a smelting furnace; a pulverized coal delivery pipe configured to deliver the pulverized coal; an air delivery pipe configured to deliver the oxygen-enriched air, and communicated with an air source; and a plurality of coal injection assemblies arranged at intervals on two opposite side walls of the smelting furnace, wherein each coal injection assembly comprises a pulverized coal lance and an air lance adjacent to each other and arranged as a pair, each pulverized coal lance being in communication with the pulverized coal delivery pipe, and each air lance being in communication with the air delivery pipe, and each coal injection assembly at least partially extends into the smelting furnace, wherein a portion of each pulverized coal lance that extends into the smelting furnace and a portion of each air lance that extends into the smelting furnace are equal in length.
According to an embodiment of the present disclosure, the pulverized coal lance of one
of two mutually opposite coal injection assemblies is opposite to the pulverized coal lance of
the other of the two mutually opposite coal injection assemblies, and the air lance of the one of the two mutually opposite coal injection assemblies is opposite to the air lance of the other
of the two mutually opposite coal injection assemblies.
According to an embodiment of the present disclosure, the pulverized coal lance of one of two mutually opposite coal injection assemblies is opposite to the air lance of the other of
the two mutually opposite coal injection assemblies, and the air lance of the one of two
mutually opposite coal injection assemblies is opposite to the pulverized coal lance of the other of the two mutually opposite coal injection assemblies.
According to an embodiment of the present disclosure, lengths of respective portions of a
plurality of pulverized coal lances extending into the smelting furnace are equal and are each 50-200 mm.
2a
According to an embodiment of the present disclosure, lengths of respective portions of a plurality of air lances extending into the smelting furnace are equal and are each 50-200 mm. According to an embodiment of the present disclosure, a portion of each pulverized coal lance that extends into the smelting furnace and a portion of each air lance that extends into the smelting furnace are equal in length. According to an embodiment of the present disclosure, a distance between the pulverized coal lance and the air lance in the plurality of coal injection assemblies is equal. According to an embodiment of the present disclosure, each pulverized coal lance and each air lance are of equal height on the smelting furnace. According to an embodiment of the present disclosure, the side-submerged combustion smelting apparatus further includes a pulverized coal distributor, and a plurality of pulverized coal lances are communicated with the pulverized coal delivery pipe by means of the pulverized coal distributor. According to an embodiment of the present disclosure, the pulverized coal lance includes: an inner injection pipe provided with a pulverized coal inlet, a pulverized coal injection port, and a pulverized coal clearing port; an outer injection pipe fitted over the inner injection pipe, and defining a cooling chamber together with the inner injection pipe, the outer injection pipe being provided with a cooling gas inlet and a cooling gas injection port both in communication with the cooling chamber; a sealing member arranged to the inner injection pipe and movable between a closed position where the pulverized coal clearing port is blocked and an open position where the pulverized coal clearing port is open; and a wear resistant lining provided to an inner circumferential surface of the inner injection pipe. According to an embodiment of the present disclosure, the air lance includes: an inner injection pipe provided with an air inlet, an air injection port, and an impurity clearing port; an outer injection pipe fitted over the inner injection pipe, and defining a cooling chamber together with the inner injection pipe, the outer injection pipe being provided with a cooling gas inlet and a cooling gas injection port both in communication with the cooling chamber; and a sealing member arranged to the inner injection pipe and movable between a closed position where the impurity clearing port is blocked and an open position where the impurity clearing port is open.
Fig. 1 is a schematic view of a side-submerged combustion smelting apparatus for
spraying oxygen-enriched air and pulverized coal based on a specific embodiment of the
present disclosure.
Fig. 2 is a schematic view of a side-submerged combustion smelting apparatus for
spraying oxygen-enriched air and pulverized coal based on another specific embodiment of
the present disclosure.
Fig. 3 is a sectional view of a pulverized coal lance of a side-submerged combustion
smelting apparatus for spraying oxygen-enriched air and pulverized coal based on yet another
specific embodiment of the present disclosure.
Fig. 4 is a sectional view of an air lance of a side-submerged combustion smelting
apparatus for spraying oxygen-enriched air and pulverized coal based on still another specific
embodiment of the present disclosure.
Reference numerals:
side-submerged combustion smelting apparatus 1 for spraying oxygen-enriched air and
pulverized coal, smelting furnace 100, pulverized coal delivery pipe 200, pulverized coal
distributor 210, air delivery pipe 300, coal injection assembly 400, pulverized coal lance 410,
inner injection pipe 411, pulverized coal inlet 4111, pulverized coal injection port 4112,
pulverized coal clearing port 4113, outer injection pipe 412, cooling chamber 4121, cooling
gas inlet 4122, cooling gas injection port 4123, sealing member 413, wear-resistant lining
414, air lance 420, air inlet 4211, air injection port 4212, impurity clearing port 4213.
DETAILED DESCRIPTION Embodiments of the present disclosure will be described in detail below, and examples
of the embodiments are shown in accompanying drawings. The same or similar elements and
the elements having same or similar functions are denoted by like reference numerals
throughout the descriptions. The embodiments described herein with reference to the
drawings are illustrative, and used to generally understand the present disclosure. The
embodiments should not be construed to limit the present disclosure.
The side-submerged combustion smelting apparatus 1 for spraying oxygen-enriched air and pulverized coal based on embodiments of the present disclosure will be described below with reference to the drawings. As illustrated in Figs. 1-4, the side-submerged combustion smelting apparatus 1 based on embodiments of the present disclosure includes a smelting furnace 100, a pulverized coal delivery pipe 200, an air delivery pipe 300 and a coal injection assembly 400. The pulverized coal delivery pipe 200 is used to deliver the pulverized coal. The air delivery pipe 300 is used to deliver the oxygen-enriched air and is communicated with an air source. A plurality of coal injection assemblies 400 are arranged at intervals on two opposite side walls of the smelting furnace 100. A portion of each coal injection assembly 400 extends into the smelting furnace 100. Each coal injection assembly 400 includes a pulverized coal lance 410 and an air lance 420 which are adjacent to each other and arranged as a pair. Each pulverized coal lance 410 is in communication with the pulverized coal delivery pipe 200, and each air lance 420 is in communication with the air delivery pipe 300. Each coal injection assembly 400 at least partially extends into the smelting furnace 100. It should be understood herein that "adjacent to each other and arranged as a pair" means that each pulverized coal lance 410 is arranged adjacent to one air lance 420 paired therewith, rather than two pulverized coal lances 410 are arranged adjacent to two air lances 420. By providing the plurality of coal injection assemblies 400, the side-submerged combustion smelting apparatus 1 based on embodiments of the present disclosure can utilize the plurality of coal injection assemblies 400 to inject the pulverized coal and air into the smelting furnace 100, thereby achieving uniform delivery of the pulverized coal and air into the smelting furnace 100. Moreover, since the coal injection assembly 400 includes the pulverized coal lance 410 and the air lance 420 arranged adjacently, each pulverized coal lance 410 being in communication with the pulverized coal delivery pipe 200, and each air lance 420 being in communication with the air delivery pipe 300, the pulverized coal lance 410 and the air lance 420 can be used to spray the pulverized coal and the air respectively. This allows the pulverized coal and the air to be mixed in the smelting furnace 100 to prevent the mixing of the pulverized coal and the air in the coal injection assembly 400. Therefore, the oxygen content in the air delivered by the air lance 420 can be increased, and the hearth area efficiency and thermal efficiency of the side-submerged combustion smelting apparatus 1 can be improved, thereby improving the production efficiency of the side-submerged combustion smelting apparatus 1, and enabling the side-submerged combustion smelting apparatus 1 to carry out large-scale industrial production with the pulverized coal as fuel. Furthermore, since the side-submerged combustion smelting apparatus 1 can use the pulverized coal as the fuel, the side-submerged combustion smelting apparatus 1 can not only have a reduced operating cost, but also be applied to regions where gas fuel is scarce, thereby improving the applicability of the side-submerged combustion smelting apparatus 1. Additionally, by providing the plurality of coal injection assemblies 400, when a part of pulverized coal lances 410 are worn, the remaining pulverized coal lances 410 can be used to continue delivering the pulverized coal, and the worn pulverized coal lances 410 can be reused after centralized maintenance at an appropriate time. Thus, it is possible to reduce the holding time after the furnace shutdown, avoid frequent interruption of the normal operation of the smelting apparatus 1, and further improve the production efficiency of the smelting apparatus 1. Further, since the pulverized coal and the air are delivered through the pulverized coal lance 410 and the air lance 420 respectively, once the pulverized coal lance 410 is clogged or damaged, the air delivery in the air lance 420 will not be affected. Compared with a multilayer-channel lance used in the related art, it is possible to ensure the delivery of oxygen enriched air while clearing the clogged pulverized coal lance 410, and improve the safety and reliability of the smelting apparatus 1. Moreover, in a case where the same amount of pulverized coal is injected and the injection pressure is the same, since the pulverized coal and the air are delivered through the pulverized coal lance 410 and the air lance 420 respectively, the quantity of the pulverized coal lance 410 and the pipeline for delivering the pulverized coal can be reduced, which can further prevent the pulverized coal from clogging the pipeline and the pulverized coal lance 410 on the one hand, and can reduce the cost of the smelting apparatus 1 on the other hand. Therefore, the side-submerged combustion smelting apparatus 1 based on embodiments of the present disclosure is able to use the pulverized coal as the fuel, and has the advantages of high productivity, low operating cost, and wide applicability.
The side-submerged combustion smelting apparatus 1 according to specific embodiments of the present disclosure will be described below with reference to the drawings. In some specific embodiments of the present disclosure, as illustrated in Figs. 1-4, the side-submerged combustion smelting apparatus 1 according to embodiments of the present disclosure includes the smelting furnace 100, the pulverized coal delivery pipe 200, the air delivery pipe 300, and the coal injection assembly 400. The air source can deliver oxygen enriched air to the air delivery pipe 300. Fig. 1 illustrates the side-submerged combustion smelting apparatus 1 according to a specific embodiment of the present disclosure. As illustrated in Fig. 1, the pulverized coal lance 410 in one of two mutually opposite coal injection assemblies 400 is opposite to the pulverized coal lance 410 in the other of two mutually opposite coal injection assemblies 400, and the air lance 420 in the one of two mutually opposite coal injection assemblies 400 is opposite to the air lance 420 in the other of two mutually opposite coal injection assemblies 400. Thus, the pulverized coal and air injected into the smelting furnace 100 can be evenly distributed, so that the pulverized coal can be fully combusted. Fig. 2 illustrates the side-submerged combustion smelting apparatus 1 according to another specific embodiment of the present disclosure. As illustrated in Fig. 2, the pulverized coal lance 410 in one of two mutually opposite coal injection assemblies 400 is opposite to the air lance 420 in the other of two mutually opposite coal injection assemblies 400, and the air lance 420 in the one of two mutually opposite coal injection assemblies 400 is opposite to the pulverized coal lance 410 in the other of two mutually opposite coal injection assemblies 400. Likewise, the pulverized coal and air injected into the smelting furnace 100 can be evenly distributed, so that the pulverized coal can be fully combusted. Optionally, as illustrated in Figs. 1 and 2, lengths of respective portions of a plurality of pulverized coal lances 410 that extend into the smelting furnace 100 are equal and are 50-200 mm. By doing so, the pulverized coal can be combusted more fully, and the smelting apparatus 1 can achieve an optimal combustion effect, so as to improve the production efficiency of the side-submerged combustion smelting apparatus 1.
Further, as illustrated in Figs. 1 and 2, lengths of respective portions of a plurality of air lances 420 that extend into the smelting furnace 100 are equal and are each 50-200 mm. By doing so, the pulverized coal can be combusted more fully, and the smelting apparatus 1 can achieve the optimal combustion effect, so as to improve the production efficiency of the side submerged combustion smelting apparatus 1. Advantageously, as illustrated in Figs. 1 and 2, a portion of each pulverized coal lance 410 that extends into the smelting furnace 100 and a portion of each air lance 420 that extends into the smelting furnace 100 are equal in length. In this way, the pulverized coal injected into the smelting furnace 100 by the pulverized coal lance 410 can be sufficiently mixed with the air injected from the air lance 420 adjacent to the pulverized coal lance 410, so that the pulverized coal can be sufficiently combusted. Specifically, as illustrated in Figs. 1 and 2, a distance between the pulverized coal lance 410 and the air lance 420 in the plurality of coal injection assemblies 400 is equal. In such a way, the combustion in the smelting furnace 1 becomes more sufficient, and the temperature in the smelting furnace 1 is more uniform. More specifically, each pulverized coal lance 410 and each air lance 420 are of equal height on the smelting furnace 100, which can facilitate the control over a liquid level in a molten bath of the side-submerged combustion smelting apparatus 1, and be convenient for the injected air to fully stir the molten bath. As illustrated in Figs. 1 and 2, the side-submerged combustion smelting apparatus 1 further includes a pulverized coal distributor 210, and the plurality of pulverized coal lances 410 are communicated with the pulverized coal delivery pipe 200 through the pulverized coal distributor 210. Thus, the pulverized coal delivered to each of the pulverized coal lances 410 can be uniform to ensure uniform combustion in the smelting furnace 100. Figs. 3 and 4 illustrate the side-submerged combustion smelting apparatus 1 according to some specific embodiments of the present disclosure. As illustrated in Fig. 3, the pulverized coal lance 410 includes an inner injection pipe 411, an outer injection pipe 412, a sealing member 413, and a wear-resistant lining 414. The inner injection pipe 411 is provided with a pulverized coal inlet 4111, a pulverized coal injection port 4112, and a pulverized coal clearing port 4113. The outer injection pipe 412 is fitted over the inner injection pipe 411, and defines a cooling chamber 4121 together with the inner injection pipe 411. The outer injection pipe 412 is provided with a cooling gas inlet 4122 and a cooling gas injection port 4123 both in communication with the cooling chamber 4121. The sealing member 413 is arranged to the inner injection pipe 411 and is movable between a closed position where the pulverized coal clearing port 4113 is blocked and an open position where the pulverized coal clearing port 4113 is open. The wear-resistant lining 414 is provided to an inner circumferential surface of the inner injection pipe 411. Therefore, when the pulverized coal lance 410 is working normally, the pulverized coal clearing port 4113 is blocked off by the sealing member 413, so that the pulverized coal cannot pass through the pulverized coal clearing port 4113; and when the inner injection pipe 411 needs to be cleaned, the sealing member 413 can be moved to the open position to clean the inner injection pipe 411 through the pulverized coal clearing port 4113 to prevent the pulverized coal from clogging the inner injection pipe 411, thereby ensuring the reliability of the delivery of the pulverized coal. In the related art, during the replacement of the pulverized coal lance, the smelting apparatus has to stop working temporarily, and the liquid level in the molten bath of the smelting apparatus is lowered below the height of the pulverized coal lance, which seriously affects the operating rate. However, for the side-submerged combustion smelting apparatus 1, the pulverized coal lance 410 is cleaned through the pulverized coal clearing port 4113, without need to lower the liquid level in the smelting apparatus 1 or shut down the smelting apparatus 1, such that the production efficiency of the smelting apparatus 1 is ensured, and the large-scale industrial production using pulverized coal as raw material is realized. In addition, by providing the cooling chamber 4121, cooling gas can be utilized to cool the outer injection pipe 412 and the inner injection pipe 411 to prevent temperature of the portion, extending into the smelting furnace 100, of the pulverized coal lance 410 from being too high, thus prevent the pulverized coal lance 410 from being damaged due to excessive temperature, and prolong the service life of the pulverized coal lance 410. By providing the wear-resistant lining 414, it is possible to prevent the inner injection pipe 411 from being worn, reduce the wear of the inner injection pipe 411 caused by the pulverized coal scouring an inner wall when the pulverized coal is delivered by the pulverized coal lance 410, and prolong the service life of the pulverized coal lance 410.
Specifically, when a part of pulverized coal lances 410 are clogged, unclogged pulverized coal lances 410 can be used to continue maintaining the normal operation of the smelting apparatus 1, and the clogged pulverized coal lances 410 can return to work after they are cleaned through the pulverized coal clearing port 4113 in time. During the cleaning, the pulverized coal lance 410 can be switched from injecting pulverized coal to injecting nitrogen by means of the pulverized coal distributor 210, to facilitate the cleaning of an operator and improve the operating environment of the operator. Optionally, the wear-resistant lining 414 can be a ceramic lining, and the cooling gas can be nitrogen. Specifically, as illustrated in Fig. 4, the air lance 420 includes an inner injection pipe 411, an outer injection pipe 412 and a sealing member 413. The inner injection pipe 411 is provided with an air inlet 4211, an air injection port 4212, and an impurity clearing port 4213. The outer injection pipe 412 is fitted over the inner injection pipe 411 and defines a cooling chamber 4121 together with the inner injection pipe 411. The outer injection pipe 412 is provided with a cooling gas inlet 4122 and a cooling gas injection port 4123 both in communication with the cooling chamber 4121. The sealing member 413 is arranged to the inner injection pipe 411 and is movable between a closed position where the impurity clearing port 4213 is blocked and an open position where the impurity clearing port 4213 is open. Therefore, when the air lance 420 is working normally, the impurity clearing port 4213 is blocked off by the sealing member 413, so that the air cannot pass through the impurity clearing port 4213; and when the inner injection pipe 411 needs to be cleaned, the sealing member 413 can be moved to the open position to clean the inner injection pipe 411 through the impurity clearing port 4213 to prevent impurities from clogging the inner injection pipe 411, thereby ensuring the reliability of the air delivery. Additionally, by providing the cooling chamber 4121, the cooling gas can be utilized to cool the outer injection pipe 412 and the inner injection pipe 411 to prevent temperature of the portion, extending into the smelting furnace 100, of the air lance 420 from being too high, thus prevent the air lance 420 from being damaged due to excessive temperature, and prolong the service life of the air lance 420. In the specification, it is to be understood that terms such as "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right,"
"vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" should be construed to refer to the orientation as then
described or as shown in the drawings under discussion. These relative terms are for convenience and ease of description, and do not require that the present disclosure have a particular orientation or be constructed or operated in a particular orientation. Thus, these terms should not be constructed to limit the present disclosure. In addition, terms such as "first" and "second" are used herein for purposes of description and are not intended to indicate or imply relative importance or significance or to imply the number of indicated technical features. Thus, the feature defined with "first" and "second" may comprise one or more of this feature. In the description of the present disclosure, "a plurality of' means two or more than two, unless specified otherwise. In the present disclosure, unless specified or limited otherwise, the terms "mounted," "connected," "coupled," "fixed" and the like are used broadly, and may be, for example, fixed
connections, detachable connections, or integral connections; may also be mechanical or electrical connections; may also be direct connections or indirect connections via intervening structures; may also be inner communications of two elements, which can be understood by those skilled in the art according to specific situations. In the present disclosure, unless specified or limited otherwise, a structure in which a first feature is "on" or "below" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other, but are contacted via an additional feature formed therebetween. Furthermore, a first feature "on," "above," or "on top of' a second feature may include an embodiment in which the first feature is right or obliquely "on," "above," or "on top of' the second feature, or just means that the first feature is at a height higher than that of the second feature; while a first feature "below," "under," or "on bottom of' a second feature may include an embodiment in which the first feature is right or obliquely "below," "under," or "on bottom of' the second feature, or just means that the first feature is at a height lower than that of the second feature. Reference throughout this specification to "an embodiment," "some embodiments," "an example," "a specific example," or "some examples," means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the phrases in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine or incorporate different embodiments or examples, as well as features in different embodiments or examples described herein, without any contradiction. Although embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that the above embodiments are explanatory and cannot be construed to limit the present disclosure, and changes, alternatives, modifications and variations can be made in the embodiments without departing from scope of the present disclosure.
Claims (10)
1. A side-submerged combustion smelting apparatus for spraying oxygen-enriched air
and pulverized coal comprising:
a smelting furnace;
a pulverized coal delivery pipe configured to deliver the pulverized coal;
an air delivery pipe configured to deliver the oxygen-enriched air, and communicated
with an air source; and
a plurality of coal injection assemblies arranged at intervals on two opposite side walls of
the smelting furnace, wherein each coal injection assembly comprises a pulverized coal lance
and an air lance adjacent to each other and arranged as a pair, each pulverized coal lance being in communication with the pulverized coal delivery pipe, and each air lance being in
communication with the air delivery pipe, and each coal injection assembly at least partially
extends into the smelting furnace, wherein a portion of each pulverized coal lance that extends into the smelting furnace
and a portion of each air lance that extends into the smelting furnace are equal in length.
2. The side-submerged combustion smelting apparatus based on claim 1, wherein the pulverized coal lance in one of two mutually opposite coal injection assemblies is opposite to
the pulverized coal lance in the other of the two mutually opposite coal injection assemblies,
and the air lance in the one of the two mutually opposite coal injection assemblies is opposite to the air lance in the other of the two mutually opposite coal injection assemblies.
3. The side-submerged combustion smelting apparatus based on claim 1, wherein the
pulverized coal lance in one of two mutually opposite coal injection assemblies is opposite to the air lance in the other of the two mutually opposite coal injection assemblies, and the air
lance in the one of the two mutually opposite coal injection assemblies is opposite to the
pulverized coal lance in the other of the two mutually opposite coal injection assemblies.
4. The side-submerged combustion smelting apparatus based on claim 1, wherein lengths
of respective portions of a plurality of pulverized coal lances extending into the smelting
furnace are equal and are each 50-200 mm.
5. The side-submerged combustion smelting apparatus based on claim 1, wherein lengths
of respective portions of a plurality of air lances extending into the smelting furnace are equal and are each 50-200 mm.
6. The side-submerged combustion smelting apparatus based on claim 1, wherein a distance between the pulverized coal lance and the air lance in the plurality of coal injection
assemblies is equal.
7. The side-submerged combustion smelting apparatus based on claim 1, wherein each
pulverized coal lance and each air lance are of equal height on the smelting furnace.
8. The side-submerged combustion smelting apparatus based on claim 1, further comprising a pulverized coal distributor, a plurality of pulverized coal lances being
communicated with the pulverized coal delivery pipe by means of the pulverized coal
distributor.
9. The side-submerged combustion smelting apparatus based on any one of claims 1 to 8,
wherein the pulverized coal lance comprises:
an inner injection pipe provided with a pulverized coal inlet, a pulverized coal injection port, and a pulverized coal clearing port;
an outer injection pipe fitted over the inner injection pipe, and defining a cooling
chamber together with the inner injection pipe, the outer injection pipe being provided with a cooling gas inlet and a cooling gas injection port both in communication with the cooling
chamber;
a sealing member arranged to the inner injection pipe and movable between a closed position where the pulverized coal clearing port is blocked and an open position where the
pulverized coal clearing port is open; and
a wear-resistant lining provided to an inner circumferential surface of the inner injection pipe.
10. The side-submerged combustion smelting apparatus based on any one of claims 1 to
8, wherein the air lance comprises: an inner injection pipe provided with an air inlet, an air injection port, and an impurity
clearing port;
an outer injection pipe fitted over the inner injection pipe, and defining a cooling chamber together with the inner injection pipe, the outer injection pipe being provided with a
cooling gas inlet and a cooling gas injection port both in communication with the cooling chamber; and a sealing member arranged to the inner injection pipe and movable between a closed position where the impurity clearing port is blocked and an open position where the impurity clearing port is open.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620439306.1 | 2016-05-16 | ||
| CN201620439306.1U CN205843366U (en) | 2016-05-16 | 2016-05-16 | Winding-up oxygen-enriched air and the side-blown submerged combustion bath smelting device of fine coal |
| CN201610321896.2A CN105823334B (en) | 2016-05-16 | 2016-05-16 | It is blown the side-blown submerged combustion bath smelting device of oxygen-enriched air and fine coal |
| CN201610321896.2 | 2016-05-16 | ||
| PCT/CN2017/078653 WO2017197985A1 (en) | 2016-05-16 | 2017-03-29 | Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2017266791A1 AU2017266791A1 (en) | 2018-11-29 |
| AU2017266791B2 true AU2017266791B2 (en) | 2020-07-23 |
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ID=60324785
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017266791A Active AU2017266791B2 (en) | 2016-05-16 | 2017-03-29 | Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3460371B1 (en) |
| AU (1) | AU2017266791B2 (en) |
| RU (1) | RU2710084C1 (en) |
| WO (1) | WO2017197985A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201901695U (en) * | 2010-11-21 | 2011-07-20 | 中国恩菲工程技术有限公司 | Continuous lead smelting device |
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| SU499316A1 (en) * | 1974-06-17 | 1976-01-15 | Институт черной металлургии | Tuyere |
| JP3516136B2 (en) * | 1999-11-26 | 2004-04-05 | 株式会社日立製作所 | Melting furnace |
| CA2513193C (en) * | 2004-07-27 | 2012-10-02 | Technological Resources Pty. Limited | Apparatus for injecting solid particulate material into a vessel |
| US8623114B2 (en) * | 2010-02-16 | 2014-01-07 | Praxair Technology, Inc. | Copper anode refining system and method |
| CN102011014B (en) * | 2010-11-21 | 2012-11-14 | 中国恩菲工程技术有限公司 | Continuous lead-smelting device and continuous lead-smelting process |
| CN102560119A (en) * | 2012-01-20 | 2012-07-11 | 中国恩菲工程技术有限公司 | Treating equipment and process of waste lead-acid accumulator |
| CN103451446A (en) * | 2013-09-10 | 2013-12-18 | 中国恩菲工程技术有限公司 | Smelting side-blowing reduction lead-zinc smelting device |
| CN103602827B (en) * | 2013-10-30 | 2014-12-03 | 安徽华鑫铅业集团有限公司金铅分公司 | Natural gas lead smelting device, and lead smelting method using natural gas lead smelting device |
| CN203960305U (en) * | 2014-06-25 | 2014-11-26 | 中国恩菲工程技术有限公司 | Tin metallurgy device continuously blows side |
| CN104152713A (en) * | 2014-08-26 | 2014-11-19 | 中国恩菲工程技术有限公司 | Side-blowing lead melting reduction device |
| CN204125511U (en) * | 2014-09-05 | 2015-01-28 | 昆明理工大学 | A kind of wind coal blown converter |
| CN204825011U (en) * | 2015-06-15 | 2015-12-02 | 中国瑞林工程技术有限公司 | Device is smelted in flash side -blown |
| CN105483393B (en) * | 2015-11-25 | 2017-11-21 | 中国恩菲工程技术有限公司 | A kind of method that reviver is handled using the side-blown fusion reducing furnace of modified |
| CN105823334B (en) * | 2016-05-16 | 2018-12-04 | 中国恩菲工程技术有限公司 | It is blown the side-blown submerged combustion bath smelting device of oxygen-enriched air and fine coal |
| CN205843366U (en) * | 2016-05-16 | 2016-12-28 | 中国恩菲工程技术有限公司 | Winding-up oxygen-enriched air and the side-blown submerged combustion bath smelting device of fine coal |
-
2017
- 2017-03-29 AU AU2017266791A patent/AU2017266791B2/en active Active
- 2017-03-29 RU RU2018143336A patent/RU2710084C1/en active
- 2017-03-29 EP EP17798549.6A patent/EP3460371B1/en active Active
- 2017-03-29 WO PCT/CN2017/078653 patent/WO2017197985A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201901695U (en) * | 2010-11-21 | 2011-07-20 | 中国恩菲工程技术有限公司 | Continuous lead smelting device |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2710084C1 (en) | 2019-12-24 |
| EP3460371C0 (en) | 2024-03-06 |
| WO2017197985A1 (en) | 2017-11-23 |
| AU2017266791A1 (en) | 2018-11-29 |
| EP3460371A1 (en) | 2019-03-27 |
| EP3460371B1 (en) | 2024-03-06 |
| EP3460371A4 (en) | 2019-10-23 |
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