WO2015196887A1

WO2015196887A1 - Continuous side-blast tin smelting technique

Info

Publication number: WO2015196887A1
Application number: PCT/CN2015/079916
Authority: WO
Inventors: 李东波; 黎敏; 王忠实; 张振民; 胡丕成; 许良; 冯双杰; 姚霞; 曹珂菲; 邓兆磊; 陈学刚; 陈霞
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2014-06-25
Filing date: 2015-05-27
Publication date: 2015-12-30
Also published as: CN104073655A; CN104073655B

Abstract

Disclosed is a continuous side-blast tin smelting technique implemented using a continuous side-blast tin smelting apparatus (10). The continuous side-blast tin smelting technique comprises the following steps: adding feed material containing tin to a smelting area (10111); using a smelting area side-blast spray gun (103) to spray from a side of the smelting area (10111) a first oxygen-containing gas and a first fuel toward the part of a melting pool that is in the smelting area (10111) so as to smelt the feed material containing tin and produce first crude tin and rich tin slag; adding a reducing agent to a reduction area (10112); using a reduction area side-blast spray gun (104) to spray from a side of the reduction area (10112) a second oxygen-containing gas and a second fuel toward the part of the melting pool that is in the reduction area (10112) so as to reduce the rich tin slag that has flown from the smelting area (10111) to the reduction area (10112) and produce second crude tin and slag, the second crude tin flowing from the reduction area (10112) to the smelting area (10111); discharging the first crude tin and the second crude tin from a tin discharge outlet (10114); intermittently discharging slag from a slag discharge outlet (10119).

Description

Continuous side blowing tin process

Technical field

The invention relates to a continuous side blowing tin process.

Background technique

The technology of tin refining includes tin concentrate reverberation furnace smelting process, electric furnace smelting process, Ausmelt smelting process, blast furnace smelting process, short kiln smelting process, and Caldo furnace smelting process. The short kiln smelting process has been eliminated due to high investment, management and maintenance costs, large amount of flue gas, and low direct yield. The structure of the Caldo furnace is complicated, the maintenance cost is high, the furnace life is short, and the refractory material is consumed. Reverberatory furnaces are rapidly being replaced by enhanced smelting methods due to their low production efficiency, low thermal efficiency, high fuel consumption, and high labor intensity. The shortcomings of electric furnace tinning are too high, and it is only suitable for processing low-iron materials. The blast furnace smelting process requires materials to be granulated or pelletized, consumes expensive metallurgical coke, the furnace atmosphere is difficult to control, and the volatilization rate of tin is high. reuse. Ausmelt smelting is an intensive molten pool smelting technology. The slag tin content can be reduced to a lower level, but the investment is large, the maintenance cost is high, and the operation is complicated.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present invention is to provide a continuous side blowing tin process having the advantages of simple process, low energy consumption, high environmental protection, and high degree of automation.

According to an embodiment of the invention, a continuous side blowing tin process implemented by a continuous side blowing tinning apparatus is proposed.

The continuous side blowing tinning apparatus comprises: a reaction furnace having a furnace chamber therein, a lower portion of the furnace chamber having a molten pool for containing slag and tin liquid, wherein the furnace chamber is provided with a partition wall and The partition wall extends into the molten pool to divide the furnace chamber into a melting zone and a reduction zone, and the molten pool of the melting zone is in communication with the molten pool of the reduction zone, and the wall of the melting zone is provided a feeding port and a tin-discharging port of the melting zone, wherein a wall of the reducing zone is provided with a reducing agent inlet port and a slag discharging port, and a top wall of the furnace cavity is provided with each of the melting zone and the reducing zone a uniformly connected venting port; a smelting zone side blowing lance, the smelting zone side blowing lance being disposed on a side wall of the smelting zone for blowing the first oxygen-containing gas and the first fuel side to the molten pool Located in a portion of the melting zone; and a reducing zone side blowing lance, the reducing zone side blowing lance is disposed on a sidewall of the reduction zone to blow the second oxygen-containing gas and the second fuel side to the melting The portion of the pool located within the reduction zone;

The continuous side blowing tinning process comprises the steps of: adding a tin-containing material to the melting zone; using the side-blowing lance of the melting zone from a side of the melting zone to the molten pool located in the melting zone a portion of the first oxygen-containing gas and the first fuel are sprayed to smelt the tin-containing material to obtain a first crude tin and a tin-rich slag; and a reducing agent is added to the a second oxygen-containing gas and a second fuel injected from a side of the reduction zone to a portion of the molten pool located in the reduction zone by the side-by-side blowing lance; The tin-rich slag flowing to the reduction zone in the smelting zone is reduced to obtain a second crude tin and slag, and the second crude tin flows from the reduction zone to the smelting zone; the discharge is discharged from the tin discharge port a first rough tin and the second coarse tin; and intermittently discharging the slag from the slag discharge port.

The continuous side blowing tin process according to the embodiment of the invention has the advantages of simple process, low energy consumption, high environmental protection, high degree of automation and the like.

According to an embodiment of the present invention, the continuous side blowing tinning process further includes conveying air from a side of the reduction zone to a portion of the molten pool located in the reduction zone to burn the fumes generated by the reduction Combustible in the middle.

According to an embodiment of the present invention, the continuous side blowing tinning process further comprises: recovering heat in the flue gas generated by the smelting using the waste heat boiler and reducing heat in the generated flue gas; and recovering the smelting by using a dust collector The tin-containing soot in the flue gas and the tin-containing soot in the flue gas produced by the reduction, and then the tin-containing soot is added to the melting zone.

According to an embodiment of the invention, the first oxygen-containing gas has a volume concentration of oxygen of 24% to 60%, and the second oxygen-containing gas has a volume concentration of oxygen of 24% to 60%.

According to an embodiment of the present invention, the first fuel is selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas, and the second fuel is selected from the group consisting of pulverized coal, natural gas, coke oven gas, and occurs. At least one of the furnace gases.

According to an embodiment of the invention, the reducing agent is granular coal.

DRAWINGS

1 is a cross-sectional view of a continuous side blowing tin cleaning apparatus in accordance with an embodiment of the present invention;

2 is a flow chart of a continuous lead smelting process in accordance with an embodiment of the present invention.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. 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.

In the field of metallurgical technology, the difference between top and side blowing is not only the change in the position of the gun, but the reaction between the two is completely different smelting equipment and processes. For example, in the field of steelmaking technology, the first is bottom-blow steel, but the later developed top-blown steel is a groundbreaking invention, which is completely different from the bottom blowing. This is not simply changing the spray gun from the bottom. It is a top blow, but it embodies different methods and conditions. It is a completely different type of furnace and process.

In the field of metallurgical technology, the use of top-blowing technology or side-blowing technology results in different kinetic conditions, melt agitation conditions and reaction mechanism (reaction sequence) of the melt in the furnace.

More specifically, the existing tin smelting techniques are based on the processes of oxidative smelting and reduction smelting. But in practice What equipment is specifically used to achieve oxidative smelting and reduction smelting is the core problem in engineering applications. Different choices of equipment determine the different technical routes (ie, processes) for achieving oxidative smelting and reduction smelting processes. The technical route will determine the reliability, feasibility, and advancement of industrial indicators. The choice of the blowing position (ie the installation position of the spray gun) is one of the most basic and core problems in equipment selection and equipment design. When side blowing or top blowing is selected, the structure of the smelting equipment (furnace type), the structure and arrangement of the spray gun are completely different.

It will be apparent to those skilled in the art that a substantially shaped smelting apparatus, regardless of any technical problems, no matter what improvements it makes, that such an improvement is unlikely to change the choice of its blowing position. Thus, variations in the position of the spray gun are not a routine and obvious choice for those skilled in the art.

Moreover, each metal element has unique physical and chemical properties. Therefore, the installation of a metal device and process without creative labor (modification) cannot be used to smelt another metal. For example, the equipment and processes for smelting tin are completely different from the equipment and processes for smelting lead. That is to say, without creative labor (modification), it is impossible to smelt tin by means of a device and process for smelting lead.

A continuous side blowing tinning apparatus 10 according to an embodiment of the present invention will now be described with reference to FIG. As shown in FIG. 1, a continuous side blowing tinning apparatus 10 according to an embodiment of the present invention includes a reaction furnace 101, a smelting zone side blowing lance 103, and a reduction zone side blowing lance 104.

The reaction furnace 101 has a furnace chamber 1011. The lower portion of the furnace chamber 1011 has a molten pool for slag and tin liquid. The furnace chamber 1011 is provided with a partition wall 102 and the partition wall 102 extends into the molten pool to divide the furnace chamber 1011 into The melting zone 10111 and the reduction zone 10112, the molten pool of the melting zone 10111 is in communication with the molten pool of the reduction zone 10112. The melting zone 10111 is provided with a melting zone feeding port 10113 and a tin discharging port 10114. The reducing zone 10112 is provided with a reducing agent inlet port 10115 and a slag discharging port 10119. The top wall of the furnace cavity 1011 is provided with a melting zone. A vent opening that communicates with each of 10111 and reduction zone 10112.

The smelting zone side blowing lance 103 is disposed on the side wall of the smelting zone 10111 to blow the first oxygen-containing gas and the first fuel side into the portion of the molten pool located in the smelting zone 10111, and the reduction zone side blowing lance 104 is disposed in the reduction zone. The sidewalls of 10112 are configured to blow the second oxygen-containing gas and the second fuel side into a portion of the molten pool located within the reduction zone 10112.

A continuous side blowing tin process carried out using the continuous side blowing tinning apparatus 10 according to an embodiment of the present invention is described below with reference to FIG. As shown in FIG. 2, the continuous side blowing tin process according to an embodiment of the present invention includes the following steps:

Adding tin-containing material to the melting zone 10111;

Using the smelting zone side blowing lance 103, a first oxygen-containing gas and a first fuel are injected from a side of the smelting zone 10111 to a portion of the molten pool located in the smelting zone 10111 to smelt the tin-containing material and obtain a first coarse Tin and rich tin slag;

Adding a reducing agent to the reduction zone 10112;

The second oxygen-containing gas and the second fuel are injected from the side of the reduction zone 10112 to the portion of the molten pool located in the reduction zone 10112 by the reduction zone side blowing lance 104 to flow from the smelting zone 10111 to the reduction zone 10112. Rich tin slag Row reduction and obtaining a second crude tin and slag, the second crude tin flowing from the reduction zone 10112 to the melting zone 10111;

Discharging the first rough tin and the second rough tin from the tin-out port 10114; and

The slag is intermittently discharged from the slag discharge port.

The continuous side blowing tinning apparatus 10 according to the embodiment of the present invention can partition the furnace chamber 1011 into the melting zone 10111 and the reduction zone 10112 by providing the partition wall 102 in the furnace cavity 1011 so that the tin can be blown on a single continuous side. Melting and reduction can be realized in 10, that is, continuous smelting is realized in a single closed continuous side blowing tin device 10, so the sealing performance is good and the environmental protection is high. Therefore, not only the enthalpy of the slag can be fully utilized, but also less fuel is consumed to replenish the heat when the slag-rich slag is reduced, and the process of smelting tin can be greatly shortened, and the continuous side blowing tin process can be simplified.

Moreover, since the side blowing is adopted, the fuel blown to the inside of the reduction zone 10112 and the second oxygen-containing gas and the carbonaceous reducing agent added to the top of the furnace directly reduce the crude tin, and the tin content in the slag is further reduced, and then the flue gas furnace is sent. Vulcanization volatilization is further depleted. In addition, since the partition wall 102 extends into the molten pool, that is, the partition wall 102 extends below the liquid surface L1 of the slag, the gas in the melting zone 10111 can be separated from the gas in the reduction zone 10112, and the melting zone 10111 The flue gas and the flue gas of the reduction zone 10112 are not mixed, and smelting and reduction are continuously smelted. .

Therefore, the continuous side blowing tinning apparatus 10 according to the embodiment of the present invention has the advantages of low energy consumption, good sealing performance, high environmental protection, simple structure, and easy operation.

Specifically, the molten pool includes a portion located in the melting zone 10111 and a portion located in the reduction zone 10112.

As shown in FIG. 1, in one embodiment of the present invention, the lower surface of the partition wall 102 is spaced apart from the bottom wall of the furnace chamber 1011, and a communication passage is formed between the lower surface of the partition wall 102 and the bottom wall of the furnace chamber 1011. 10117.

In another embodiment of the invention, the partition wall 102 is coupled to the bottom wall of the furnace chamber 1011, and the partition wall 102 is provided with a communication passage 10117.

The tin-rich slag may flow from the smelting zone 10111 to the reduction zone 10112 through the communication passage 10117, and the second coarse tin may flow from the reduction zone 10112 to the smelting zone 10111 through the communication passage 10117.

As shown in Fig. 1, in the molten pool, L1 is the liquid surface of the slag, and L2 is the liquid surface of the crude tin. The portion of the molten pool located in the melting zone 10111 accommodates the tin-rich slag, and the portion of the molten pool located in the reduction zone 10112 accommodates the reduced slag (the tin content of the slag is less than or equal to 3-5 wt%) %).

As shown in FIG. 1, in a specific example of the present invention, the reaction furnace 101 may be a horizontal furnace. Specifically, the reaction furnace 101 may be a long oval fixed horizontal furnace. The bottom wall of the furnace chamber 1011 may have a concave curved shape.

The smoke outlet may include a smelting zone outlet 10118 and a reduction zone outlet 10116. The smelting zone feed port 10113 and the smelting zone vent opening 10118 may be disposed on the top wall of the smelting zone 10111, the reducing agent inlet port 10115 and the reduction zone. The vent 10116 may be disposed on the top wall of the reduction zone 10112. Thereby, the structure of the continuous side blowing tinning apparatus 10 can be made more reasonable.

The tin-out port 10114 may be disposed on the sidewall of the melting zone 10111 and the tin-discharging port 10114 may be remote from the partition wall 102, and the slag tapping port may be disposed on the end wall of the reduction zone 10112. Thereby, the structure of the continuous side blowing tinning apparatus 10 can be made more reasonable. Advantageously, the tin port 10114 can be adjacent to the bottom wall of the reaction furnace 101.

A smelting zone lance can be provided on the side wall of the smelting zone 10111, and a reduction zone lance can be provided on the side wall of the reduction zone 10112. Wherein, the smelting zone side blowing lance 103 may be disposed in the smelting zone lance and the reduction zone side blasting gun 104 may be disposed in the reduction zone lance.

Specifically, the end of the smelting zone side blowing lance 103 may be located in the blasting port of the smelting zone, and the end of the smelting zone side blasting gun 103 may also protrude from the blasting zone of the smelting zone, that is, the smelting zone side blasting gun 103 The ends can extend into the furnace cavity 1011. The end of the reduction zone side blowing lance 104 may be located in the lance nozzle of the reduction zone, and the end of the reduction zone side lance 104 may also extend out of the reduction zone lance, that is, the end of the reduction zone side lance 104 may extend. It enters the furnace chamber 1011.

As shown in FIG. 1, more specifically, the smelting zone side blowing lance 103 can spray the first oxygen-containing gas and the first fuel onto the liquid surface L2 of the rough tin of the smelting zone 10111 and the slag-rich slag. Below the liquid level L1. In other words, the smelting zone side blowing lance 103 can inject the first oxygen-containing gas and the first fuel into the lead-rich slag in the smelting zone 10111.

The reduction zone side blowing lance 104 can spray the second oxygen-containing gas and the second fuel onto the liquid surface L2 of the crude tin of the reduction zone 10112 and below the liquid level L1 of the slag. In other words, the reduction zone side blowing lance 104 can inject the second oxygen-containing gas and the second fuel into the slag in the reduction zone 10112, so that in the reduction zone 10112, the second oxygen-containing gas injected by the reduction zone side lance 104 is injected. The body and the second fuel do not repeatedly oxidize the crude lead that has been reduced.

As shown in FIG. 1, in one example of the present invention, the smelting zone side blowing lance 103 may be plural, and the plurality of smelting zone side blasting lances 103 may be disposed at the smelting zone 10111 at intervals along the length direction of the reaction furnace 101. On the side wall, the reduction zone side blowing lances 104 may be plural, and the plurality of reduction zone side blowing lances 104 may be disposed on the side walls of the reduction zone 10112 spaced apart along the length direction of the reaction furnace 101. Thereby, the structure of the continuous side blowing tinning apparatus 10 can be made more reasonable. Here, the longitudinal direction of the reaction furnace 101 is as indicated by an arrow A in FIG.

A tin-containing material (for example, tin concentrate) is added from the smelting zone feed port 10113 to the smelting zone 10111, and the first oxygen-containing gas injected from the smelting zone side blowing lance 103 and the first fuel are smelted to obtain a coarse tin. And rich tin slag. The tin-rich slag in the smelting zone 10111 flows from the communication passage 10117 into the reduction zone 10112. The reducing agent is added from the reducing agent inlet 10115 to the reducing zone 10112 to reduce the tin in the tin-rich slag, and the second oxygen-containing gas and the second are injected into the slag in the reducing zone 10112 through the reducing zone side blowing lance 104. The fuel is used to maintain and increase the temperature of the reduction zone 10112.

It is to be understood that by controlling the amount of injection, a part of the fuel injected by the reduction zone side blowing lance 104 can also be used as a reducing agent to simultaneously reduce the tin-rich slag together with the added reducing agent.

The volume of oxygen of the first oxygen-containing gas is from 24% to 60%. That is, the first oxygen-containing gas has an oxygen content of 24% to 60% by volume. This makes it possible to smelt the tin-containing material better.

The volume concentration of the oxygen of the second oxygen-containing gas is from 30% to 100%, that is, the oxygen content of the second oxygen-containing gas is from 30% to 100%. This makes it possible to better reduce the tin-rich slag.

The reducing agent may be granulated coal. It is generally believed by those skilled in the art that the use of metallurgical coke as a reducing agent can effectively reduce the tin-rich slag. After intensive research and creative labor, the inventor found that the reduction of tin-rich slag by using granulated coal can further reduce the tin content in the slag compared with the reduction of rich tin slag by metallurgical coke (the slag content The amount of tin is 3-5 wt% or less, so that the direct yield and recovery of tin can be further improved. Therefore, by using granular coal as a reducing agent, technical bias is overcome and costs can be reduced.

Advantageously, the particle size of the granular coal may be less than or equal to a predetermined value.

The first fuel may be selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas, and the second fuel may be selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas. Kind.

It is also possible to add a flux to the smelting zone and the reduction zone, which may be limestone, quartz or a mixture of quartz and lime.

The tin-rich slag is reduced to produce a second coarse tin and slag, and the second coarse tin may flow into the portion of the molten pool located in the smelting zone 10111 through the communication passage 10117. The first rough tin and the second coarse tin may be discharged from the furnace opening 10114 from the furnace opening 10114. The slag generated in the reduction zone 10112 (i.e., the slag produced by the reduction of the tin-rich slag in the reduction zone 10112) is periodically discharged from the slag discharge port. The slag produced in the reduction zone 10112 can be discharged once every 1.5 hours to 2 hours.

In some examples of the invention, the continuous side blowing tinning apparatus 10 may also include a waste heat boiler. The waste heat boiler may be connected to the outlet port to recover heat in the flue gas generated by the smelting and to recover heat in the generated flue gas by using the waste heat boiler.

The continuous side blowing tinning apparatus 10 further includes a dust collector (for example, a bag dust collector), and the dust collector may be connected to the waste heat boiler to recover tin contained in the smoke generated by the smelting by the dust collector. Smoke and tin-containing soot in the flue gas produced by reduction.

The continuous side blowing tinning apparatus 10 may further include a cooler that may be coupled to the waste heat boiler and the dust collector may be coupled to the cooler.

Among them, tin-containing soot can be added to the melting zone 10111. When the continuous side blowing of the tinning apparatus 10 is started, since the tin-containing soot is not generated, the tin-containing material and the flux can be added to the melting zone 10111. After the tin-containing soot is generated, the tin-containing soot, the tin-containing material, and the flux may be added to the melting zone 10111.

The continuous side blowing tinning apparatus 10 according to an embodiment of the present invention can achieve continuous tinning and periodic slagging.

A secondary tuyere may be disposed on the side wall of the reduction zone 10112, and air is transported from the secondary tuyere to a portion of the molten pool located in the reduction zone 10112 to combust combustibles in the flue gas produced by the reduction. This can improve environmental performance and safety.

A first ventilating chamber for preventing diffusion of tin vapor is provided at the discharge port 10114, and a second ventilating chamber for preventing diffusion of tin vapor is provided at the slag opening.

The technical advantages of the continuous side blowing tinning apparatus 10 and the continuous side blowing tinning process according to embodiments of the present invention are:

1. Low energy consumption: The smelting process from tin material to crude tin is realized in a furnace. Industrial oxygen (oxygen volume concentration 30%-100%) is used in the smelting process, the amount of flue gas is small, the smoke rate is low, and the coal is used. (Gravel coal) as a reducing agent, does not require relatively expensive metallurgical coke, while recovering waste heat from the smelting section and the reducing section flue gas.

2, good environmental protection: tin concentrate smelting process in a closed reaction furnace 101, to avoid the escape of smoke, tin concentrate or other tin raw materials with the granulation directly into the furnace, the material preparation process is simple, the production process The tin soot produced in the middle is sealed and transported and returned to the ingredients, effectively preventing the dispersion of the tin dust; the flue gas produced by the smelting is sent to the desulfurization system after the waste heat is recovered and collected. The crude tin produced in the smelting section and the reduction section of the continuous side blowing furnace is discharged from the tin discharge port, and the produced slag is discharged from the slag port of the reduction section, and a ventilating chamber is provided at the tin discharge port and the slag discharge port to prevent the diffusion of the tin vapor. Basically solved the problem of tin smelting smoke and tin dust pollution.

3. High recovery rate: In the continuous side blowing tin furnace, due to the full utilization of the slag enthalpy, the reduction section of the continuous side blowing tin furnace will consume less fuel to replenish heat, and the smelting process uses industrial oxygen. And the use of crushed coal as a reducing agent effectively reduces the amount of smoke and smoke, reduces the tin content in the slag, and improves the direct yield and recovery of tin.

4. The continuous side blowing lead method is the method of all the tin making methods, including the material preparation system, the shortest process, simple process equipment and low investment.

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 continuous side blowing tin process using a continuous side blowing tinning device, characterized in that

The continuous side blowing tinning device comprises:

a reaction furnace having a furnace chamber therein, a lower portion of the furnace chamber having a molten pool for containing slag and tin liquid, the furnace chamber being provided with a partition wall and the partition wall extending into the melting chamber a chamber for separating the furnace chamber into a melting zone and a reduction zone, wherein the molten pool of the melting zone is in communication with the molten pool of the reduction zone, and the wall of the melting zone is provided with a feeding port of the melting zone and a tin-discharging port. a reducing agent inlet port and a slag discharge port are disposed on a wall of the reduction zone, and a top of the furnace cavity is provided with a smoke outlet connected to each of the melting zone and the reduction zone;

a smelting zone side blowing lance, the smelting zone side blowing lance being disposed on a side wall of the smelting zone to blow the first oxygen-containing gas and the first fuel side to a portion of the molten pool located in the smelting zone ;with

a reduction zone side blowing lance, the reduction zone side blowing lance being disposed on a sidewall of the reduction zone to blow a second oxygen-containing gas and a second fuel side to a portion of the molten pool located in the reduction zone ;

The continuous side blowing tin process comprises the following steps:

Adding a tin-containing material to the smelting zone;

Using the smelting zone side blowing lance to inject a first oxygen-containing gas and a first fuel from a side of the smelting zone to a portion of the smelting zone in the smelting zone to smelt the tin-containing material and obtain First coarse tin and rich tin slag;

Adding a reducing agent to the reduction zone;

Spraying a second oxygen-containing gas and a second fuel from a side of the reduction zone to a portion of the molten pool located in the reduction zone by the reduction zone side blowing lance to flow from the smelting zone to The tin-rich slag of the reduction zone is reduced to obtain a second crude tin and slag, and the second crude tin flows from the reduction zone to the smelting zone;

Discharging the first rough tin and the second rough tin from the tin discharge port; and

The slag is intermittently discharged from the slag discharge port.
The continuous side blowing tin process according to claim 1, further comprising conveying air from a side of said reduction zone to a portion of said molten pool located in said reduction zone for combustion reduction Combustibles in the smoke.
The continuous side blowing tin process according to claim 1, further comprising:

Recovering the heat in the flue gas produced by the smelting and the heat in the flue gas generated by the use of the waste heat boiler; and

The tin-containing soot in the flue gas generated by the smelting and the tin-containing soot in the flue gas generated by the reduction are recovered by a dust collector, and then the tin-containing soot is added to the melting zone.
The continuous side blowing tin process according to any one of claims 1 to 3, wherein the first oxygen is contained The volumetric concentration of oxygen in the gas is from 24% to 60%, and the volume concentration of oxygen in the second oxygen-containing gas is from 24% to 60%.
The continuous side blowing tin process according to any one of claims 1 to 3, wherein the first fuel is at least one selected from the group consisting of pulverized coal, natural gas, coke oven gas, and producer gas. The second fuel is selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas.
The continuous side blowing tin process according to any one of claims 1 to 3, wherein the reducing agent is granular coal.