WO2017197985A1

WO2017197985A1 - Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal

Info

Publication number: WO2017197985A1
Application number: PCT/CN2017/078653
Authority: WO
Inventors: 陈学刚; 黎敏; 邬传谷; 曹珂菲; 张清; 林屹; 冯双杰
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2016-05-16
Filing date: 2017-03-29
Publication date: 2017-11-23
Also published as: EP3460371A4; EP3460371C0; EP3460371A1; RU2710084C1; EP3460371B1; AU2017266791B2; AU2017266791A1

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

Side-blown immersion combustion pool melting device for blowing oxygen-enriched air and pulverized coal

Technical field

The invention relates to the technical field of metallurgy, in particular to a side-blown submerged combustion pool melting device for blowing oxygen-enriched air and pulverized coal.

Background technique

The side-blown immersion combustion pool smelting process (SSC process) is to inject oxygen-enriched air and gaseous fuel into the molten pool through the tuyere or spray gun on both sides of the melting furnace, and the injected gas agitates the molten pool to accelerate heat and mass transfer in the molten pool. And chemical reactions, widely used in the field of non-ferrous metals and solid waste treatment such as lead smelting, zinc slag smelting, copper smelting.

The side-blown immersion smelting device in the related art uses natural gas, coke oven gas, and generated gas as fuel, but in the gas-deficient region, gas cannot be economically used as a side-blown immersion smelting device fuel, which limits the side-blown immersion combustion technology. applicability.

In the smelting device of the related art, if pulverized coal is used as the fuel, the pulverized coal and the air are mixed inside the spray gun or the tuyere. To ensure safety, the oxygen concentration in the air cannot be too high, and the bed energy rate and thermal efficiency cannot be adapted. The current development of the non-ferrous metal smelting industry requires large-scale industrial production.

Summary of the invention

The present invention aims to solve at least one of the above technical problems in the prior art to some extent. To this end, the present invention provides a side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal, which is capable of using pulverized coal as a fuel by a side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal. It has the advantages of high production efficiency, low operating cost and wide applicability.

In order to achieve the above object, according to an embodiment of the present invention, a side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal is provided, and the side-blown submerged combustion molten pool for blowing oxygen-enriched air and pulverized coal is smelted. The device comprises: a melting furnace; a pulverized coal conveying pipe for conveying pulverized coal; an air conveying pipe for conveying oxygen-enriched air, the air conveying pipe is connected with the gas source; a plurality of coal injection components, and the plurality of the coal injection The components are respectively spaced apart on opposite side walls of the melting furnace, each of the coal injection assemblies comprising adjacently disposed pulverized coal lances and air lances, each of the pulverized coal lances and the powder The coal delivery tubes are in communication, each of the air lances being in communication with the air delivery tubes, each of the coal injection assemblies extending at least partially into the smelting furnace.

The side-blown submerged combustion molten pool smelting device for injecting oxygen-enriched air and pulverized coal according to the embodiment of the present invention can use pulverized coal as a fuel, and has the advantages of high production efficiency, low running cost, wide applicability and the like.

Further, the side-blown submerged combustion molten pool smelting apparatus for injecting oxygen-enriched air and pulverized coal according to the above embodiment of the present invention It may have the following additional technical features:

According to an embodiment of the present invention, the pulverized coal lance of one of the two coal injection assemblies opposite to each other is opposed to the pulverized coal lance of the other, and the air of one of the two coal injection assemblies opposite to each other The spray gun is opposite the air lance of the other.

According to one embodiment of the invention, the pulverized coal lance of one of the two coal injection assemblies opposite each other is opposite the air lance of the other, and the air lance of one of the two coal injection assemblies opposite each other Opposite another pulverized spray gun.

According to an embodiment of the invention, the portions of the plurality of pulverized coal lances that extend into the smelting furnace are of equal length and are each 50-200 mm.

According to an embodiment of the invention, the portions of the plurality of air lances that extend into the smelting furnace are of equal length and are each 50-100 mm.

According to an embodiment of the invention, each of the pulverized coal lances and a portion of each of the air lances that extend into the smelting furnace are of equal length.

According to an embodiment of the invention, the 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 invention, each of said pulverized coal lances and each of said air lances are of equal height on said smelting furnace.

According to an embodiment of the present invention, the side-blown submerged combustion pool smelting apparatus for blowing oxygen-enriched air and pulverized coal further comprises a pulverized coal distributor through which the plurality of pulverized coal lances pass The pulverized coal conveying pipe is connected.

According to an embodiment of the present invention, the pulverized coal lance includes: an inner nozzle having a pulverized coal inlet, a pulverized coal vent and a pulverized coal cleaning port; an outer nozzle, the outer nozzle arranging A cooling chamber is defined on the inner nozzle and together with the inner nozzle, the outer nozzle has a cooling gas inlet and a cooling air nozzle communicating with the cooling chamber; a sealing member, the sealing member is provided On the inner nozzle, and movable between a closed position for blocking the pulverized coal cleaning port and an open position for opening the pulverized coal cleaning port; a wear resistant lining, the wear resistant lining is disposed at The inner circumferential surface of the inner nozzle.

According to an embodiment of the present invention, the air lance includes: an inner nozzle having an air inlet, an air vent and an impurity cleaning port; and an outer nozzle, the outer nozzle being sleeved therein a cooling chamber is defined on the nozzle together with the inner nozzle, the outer nozzle has a cooling gas inlet and a cooling air nozzle communicating with the cooling chamber; a sealing member, the sealing member is disposed therein The nozzle is movable between a closed position for blocking the impurity cleaning port and an open position for opening the impurity cleaning port.

DRAWINGS

1 is a side-blown submerged combustion pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to an embodiment of the present invention. Schematic diagram of the structure.

2 is a schematic view showing the structure of a side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to another embodiment of the present invention.

3 is a cross-sectional view of a pulverized coal lance of a side-blown submerged combustion smelting apparatus for blowing oxygen-enriched air and pulverized coal according to another embodiment of the present invention.

4 is a cross-sectional view of an air lance of a side-blown submerged combustion smelting apparatus for blowing oxygen-enriched air and pulverized coal in accordance with another embodiment of the present invention.

LIST OF REFERENCE NUMERALS: side-blown submerged combustion pool smelting apparatus for blowing oxygen-enriched air and pulverized coal 1, smelting furnace 100, pulverized coal conveying pipe 200, pulverized coal distributor 210, air conveying pipe 300, coal injection assembly 400, powder Coal lance 410, inner nozzle 411, pulverized coal inlet 4111, pulverized coal nozzle 4112, pulverized coal cleaning port 4113, outer nozzle 412, cooling chamber 4121, cooling gas inlet 4122, cooling gas nozzle 4123, sealing member 413, wear resistant The inner liner 414, the air spray gun 420, the air inlet 4211, the air nozzle 4212, and the impurity cleaning port 4213.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A side-blown submerged combustion pool melting apparatus 1 for blowing oxygen-enriched air and pulverized coal according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, a side-blown submerged combustion molten pool smelting apparatus 1 for blowing oxygen-enriched air and pulverized coal according to an embodiment of the present invention includes a melting furnace 100, a pulverized coal conveying pipe 200, an air delivery pipe 300, and a spray. Coal assembly 400.

The pulverized coal delivery pipe 200 is used to transport pulverized coal. The air delivery tube 300 is used to deliver oxygen-enriched air and is in communication with the gas source. A plurality of coal injection assemblies 400 are respectively disposed on opposite sidewalls of the melting furnace 100, and a portion of each coal injection assembly 400 extends into the melting furnace 100, and each of the coal injection assemblies 400 includes adjacent pairs of pulverized coal. The spray gun 410 and the air spray gun 420 are each in communication with the pulverized coal delivery pipe 200, and each of the air spray guns 420 is in communication with the air delivery pipe 300. Each coal injection assembly 400 extends at least partially into the melting furnace 100. It is to be understood herein that "adjacent pairs" means that each of the pulverized coal lances 410 is disposed adjacent to an air lance 420 that is paired therewith, and does not mean that two pulverized coal lances 410 and two air lances 420 are disposed adjacent to each other.

According to the embodiment of the present invention, the side-blown submerged combustion pool melting apparatus 1 for blowing oxygen-enriched air and pulverized coal can be sprayed into the melting furnace 100 by using a plurality of coal injection assemblies 400 by providing a plurality of coal injection assemblies 400. Coal and air to achieve uniform delivery of pulverized coal and air into the smelting furnace 100, and since the coal injection assembly 400 includes adjacently disposed pulverized coal lances 410 and air lances 420, each of the pulverized coal lances 410 and the pulverized coal delivery tubes 200 connected, each air gun 420 is empty The gas delivery pipe 300 is in communication, and 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 air to be mixed in the melting furnace 100 to prevent mixing of the pulverized coal and air in the coal injection assembly 400. Thereby, the oxygen content in the air delivered by the air lance 420 can be increased, and the bed energy rate and thermal efficiency of the side immersion immersion melting pool smelting device 1 can be improved, thereby improving the production efficiency of the side immersion immersion melting pool smelting device 1, and the side is improved. The blown immersion molten pool smelting apparatus 1 is capable of large-scale industrial production using pulverized coal as a fuel.

Further, since the side-blown immersion combustion molten pool melting apparatus 1 can use pulverized coal as a fuel, not only the running cost of the side-blown submerged combustion molten pool melting apparatus 1 can be reduced, but also the side-blown submerged combustion molten pool melting apparatus 1 can be applied to The area where gas fuel is scarce, thereby improving the applicability of the side-blown submerged combustion pool melting apparatus 1.

In addition, by providing a plurality of coal injection assemblies 400, when some of the pulverized coal injection guns 410 are worn, the remaining pulverized coal lances 410 can be used to continue to transport the pulverized coal, and the worn pulverized coal lances 410 can be used for centralized maintenance after a suitable time. This can reduce the furnace holding time, avoid frequent interruption of the normal operation of the melting device 1, and further improve the production efficiency of the melting device 1.

Further, since the pulverized coal and the air are respectively transported through the pulverized coal lance 410 and the air lance 420, once the pulverized coal lance 410 is clogged or broken, the air in the air lance 420 is not affected, compared to the related art. The way of the channel spray gun can clean the blocked pulverized coal lance 410 while ensuring the transportation of oxygen-enriched air and improve the safety and reliability of the smelting device 1. Moreover, in the case where the same amount of pulverized coal is blown and the injection pressure is the same, since the pulverized coal and the air are respectively transported through the pulverized coal lance 410 and the air lance 420, the pulverized coal lance 410 and the tube for conveying the pulverized coal can be reduced. The number of roads, on the one hand, can further prevent the pulverized coal from clogging the pipeline and the pulverized coal lance 410, and on the other hand can reduce the cost of the smelting apparatus 1.

Therefore, the side-blown submerged molten pool smelting apparatus 1 according to the embodiment of the present invention can use pulverized coal as a fuel, and has the advantages of high production efficiency, low running cost, wide applicability, and the like.

A side-blown submerged combustion pool melting apparatus 1 according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in FIGS. 1-4, a side-blown immersion combustion pool smelting apparatus 1 according to an embodiment of the present invention includes a melting furnace 100, a pulverized coal conveying pipe 200, an air delivery pipe 300, and Coal injection assembly 400. Wherein, the gas source can deliver oxygen-enriched air into the air delivery tube 300.

1 shows a side-blown submerged molten pool smelting apparatus 1 in accordance with an embodiment of the present invention. As shown in FIG. 1, the pulverized coal lance 410 of one of the two coal injection assemblies 400 opposite to each other is opposed to the pulverized coal lance 410 of the other, and the air lance 420 of one of the two coal injection assemblies 400 opposed to each other is shown in FIG. Opposite the air lance 420 of the other. This makes it possible to uniformly distribute the pulverized coal and the air which are blown into the melting furnace 100 so that the pulverized coal can be sufficiently burned.

Figure 2 illustrates a side blow immersion combustion bath smelting apparatus 1 in accordance with another embodiment of the present invention. As shown in FIG. 2, the pulverizing lance 410 of one of the two coal injection assemblies 400 opposed to each other is opposed to the air lance 420 of the other, and the air lance 420 of one of the two coal injection assemblies 400 opposed to each other is The other pulverized coal lance 410 is opposite. This Similarly, the pulverized coal and air sprayed into the melting furnace 100 can be evenly distributed to enable the pulverized coal to be fully combusted.

Alternatively, as shown in FIGS. 1 and 2, portions of the plurality of pulverized coal lances 410 that extend into the smelting furnace 100 are equal in length and each are 50-200 mm. This not only makes the pulverized coal burn more fully, but also allows the smelting device 1 to achieve an optimum combustion effect, in order to improve the production efficiency of the side-blown immersion combustion smelting unit 1.

Further, as shown in FIGS. 1 and 2, the portions of the plurality of air lances 420 that extend into the smelting furnace 100 are equal in length and each are 50-100 mm. This not only makes the pulverized coal burn more fully, but also allows the smelting device 1 to achieve an optimum combustion effect, in order to improve the production efficiency of the side-blown immersion combustion smelting unit 1.

Advantageously, as shown in Figures 1 and 2, each pulverized coal lance 410 and the portion of each air lance 420 that extends into the smelting furnace 100 are of equal length. In this way, the pulverized coal injected into the melting furnace 100 by the pulverized coal blasting gun 410 can be sufficiently mixed with the air injected from the air blasting gun 420 adjacent thereto, so that the pulverized coal can be sufficiently burned.

Specifically, as shown in FIGS. 1 and 2, the distance between the pulverized coal lance 410 and the air lance 420 in the plurality of coal injection assemblies 400 is equal. This makes the combustion in the melting furnace 1 more complete and makes the temperature in the melting furnace 1 more uniform.

More specifically, each of the pulverized coal lances 410 and each of the air lances 420 are equal in height on the smelting furnace 100. This can facilitate the control side blowing to immerse the height of the molten pool in the molten pool smelting device, so that the injected gas can fully agitate the molten pool.

1 and 2, the side-blown submerged molten pool smelting apparatus 1 further includes a pulverized coal distributor 210, and the plurality of pulverized coal lances 410 are communicated with the pulverized coal conveying pipe 200 through the pulverized coal distributor 210. Thereby, the pulverized coal delivered to each of the pulverized coal lances 410 can be made uniform to ensure uniform combustion in the smelting furnace 100.

3 and 4 illustrate a side blow immersion combustion bath smelting apparatus 1 in accordance with some embodiments of the present invention. As shown in FIG. 3, the pulverized coal lance 410 includes an inner nozzle 411, an outer nozzle 412, a seal 413, and a wear resistant liner 414. The inner nozzle 411 has a pulverized coal inlet 4111, a pulverized coal nozzle 4112 and a pulverized coal cleaning port 4113. The outer nozzle 412 is sleeved on the inner nozzle 411 and defines a cooling chamber 4121 together with the inner nozzle 411. The outer nozzle 412 has a cooling air inlet 4122 and a cooling air nozzle 4123 communicating with the cooling chamber 4121. The seal member 413 is movably provided on the inner nozzle 411 between a closed position in which the pulverized coal cleaning port 4113 is closed and an open position in which the pulverized coal cleaning port 4113 is opened. The wear resistant liner 414 is provided on the inner peripheral surface of the inner nozzle 411. In this way, when the pulverized coal lance 410 is working normally, the pulverized coal cleaning port 4113 is sealed by the sealing member 413, so that the pulverized coal cannot pass through the pulverized coal cleaning port 4113, and the sealing member 413 can be moved to when the inner nozzle 411 needs to be cleaned. In the open position, the inner nozzle 411 is cleaned by the pulverized coal cleaning port 4113 to prevent the pulverized coal from clogging the inner nozzle 411, thereby ensuring the reliability of the pulverized coal transportation.

In the smelting device in the background art, when the pulverized coal lance is replaced, the work of the smelting device needs to be temporarily stopped, and the molten pool level of the smelting device is lowered below the height of the pulverized lance, which seriously affects the working rate. The pulverized coal lance 410 of the side-blown immersion combustion smelting apparatus 1 which blows the oxygen-enriched air and the pulverized coal is cleaned by the pulverized coal cleaning port 4113, and it is not necessary to lower the liquid level of the smelting apparatus 1, so that the smelting apparatus 1 can be omitted. Stopping work to ensure the production efficiency of the melting device 1, Achieve large-scale industrial production using pulverized coal as raw material.

In addition, by providing the cooling chamber 4121, the outer nozzle 412 and the inner nozzle 411 can be cooled by the cooling gas, and the temperature of the portion of the pulverized coal lance 410 that extends into the melting furnace 100 is prevented from being excessively high to prevent the pulverized coal lance 410 from being overheated. High and damaged, extending the service life of the pulverized coal lance 410. The inner nozzle 411 can be prevented from being worn by the wear-resistant inner liner 414. When the pulverized coal lance 410 is used to transport the pulverized coal, the wear caused by the pulverized coal flushing inner wall to the inner nozzle 411 is reduced, and the service life of the pulverized coal lance 410 is prolonged.

Specifically, when a part of the pulverized coal lance 410 is clogged, the unblocked pulverized coal lance 410 can be used to continue the normal operation of the smelting apparatus 1, and the pulverized coal lance 410 can be cleaned by the pulverized coal cleaning port 4113 in time to recover the powder. The work of the coal lance 410. At the time of cleaning, the pulverized coal distributor 410 can be used to switch the pulverized coal lance 410 to be blown with nitrogen to facilitate cleaning by the operator and improve the operating environment of the operator.

Alternatively, the wear resistant liner 414 can be a ceramic liner and the cooling gas can be nitrogen.

Specifically, as shown in FIG. 4, the air lance 420 includes an inner nozzle 411, an outer nozzle 412, and a seal 413. The inner nozzle 411 has an air inlet 4211, an air nozzle 4212, and an impurity cleaning port 4213. The outer nozzle 412 is sleeved on the inner nozzle 411 and defines a cooling chamber 4121 together with the inner nozzle 411. The outer nozzle 412 has a cooling air inlet 4122 and a cooling air nozzle 4123 communicating with the cooling chamber 4121. The seal member 413 is movably provided on the inner nozzle 411 between a closed position at which the impurity cleaning port 4213 is closed and an open position at which the impurity cleaning port 4213 is opened. This can seal the impurity cleaning port 4213 with the sealing member 413 when the air lance 420 is normally operated, so that the air cannot pass through the impurity cleaning port 4213, and the sealing member 413 can be moved to the open position when the inner nozzle 411 needs to be cleaned. The inner nozzle 411 is cleaned by the impurity cleaning port 4213 to prevent impurities from clogging the inner nozzle 411, thereby ensuring the reliability of air transportation. In addition, by providing the cooling chamber 4121, the outer nozzle 412 and the inner nozzle 411 can be cooled by the cooling gas, and the temperature of the portion of the air lance 420 that is prevented from extending into the melting furnace 100 is prevented from being excessively high to prevent the air lance 420 from being overheated. Damage, extending the life of the air lance 420.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A side-blown submerged smelting smelting device for blowing oxygen-enriched air and pulverized coal, comprising:

Melting furnace

Pulverized coal conveying pipe for conveying pulverized coal;

An air delivery tube for delivering oxygen-enriched air, the air delivery tube being in communication with a source of gas;

a plurality of coal injection assemblies, wherein the plurality of coal injection assemblies are respectively spaced apart on opposite side walls of the melting furnace, each of the coal injection assemblies comprising adjacently arranged pairs of pulverized coal guns and air spray guns, Each of the pulverized coal lances is in communication with the pulverized coal delivery tube, each of the air lances being in communication with the air delivery tube, each of the coal injection assemblies extending at least partially into the smelting furnace.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein a pulverized coal lance of one of said two coal injection assemblies opposed to each other and another The pulverized lances are opposed to each other and the air lances of one of the two coal injection assemblies opposite each other are opposite the air lance of the other.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein a pulverized coal lance of one of said two coal injection assemblies opposed to each other and another The air lances are opposed, and the air lances of one of the two coal injection assemblies opposite each other are opposite the pulverized coal lance of the other.
The side-blown submerged combustion molten pool melting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein a plurality of said pulverized coal lances extend into said smelting furnace to have the same length and both 50-200 mm.
The side-blown submerged combustion molten pool melting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein a plurality of said air lances extend into said smelting furnace to have equal lengths of 50 -100 mm.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein each of said pulverized coal lances and each of said air lances extend into said smelting furnace The lengths of the parts are equal.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein between said pulverized coal lance and said air lance in said plurality of said coal injection assemblies The distance is equal.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, wherein each of said pulverized coal lances and each of said air lances are on said smelting furnace The height is equal.
A side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to claim 1, further comprising a pulverized coal distributor through which said plurality of pulverized coal lances pass It is in communication with the pulverized coal conveying pipe.
The side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to any one of claims 1 to 9, wherein the pulverized coal lance comprises:

An inner nozzle having a powder coal inlet, a pulverized coal nozzle and a pulverized coal cleaning port;

An outer nozzle, the outer nozzle is sleeved on the inner nozzle and defines a cooling chamber together with the inner nozzle, the outer nozzle has a cooling gas inlet and cooling communicating with the cooling chamber Air vent

a sealing member disposed on the inner nozzle and movable between a closed position for closing the pulverized coal cleaning port and an open position for opening the pulverized coal cleaning port;

A wear resistant lining is provided on an inner circumferential surface of the inner nozzle.
The side-blown submerged combustion molten pool smelting apparatus for blowing oxygen-enriched air and pulverized coal according to any one of claims 1 to 9, wherein the air lance comprises:

An inner nozzle having an air inlet, an air nozzle and an impurity cleaning port;

An outer nozzle, the outer nozzle is sleeved on the inner nozzle and defines a cooling chamber together with the inner nozzle, the outer nozzle has a cooling gas inlet and cooling communicating with the cooling chamber Air vent

a sealing member disposed on the inner nozzle and movable between a closed position in which the impurity cleaning opening is blocked and an open position in which the impurity cleaning opening is opened.