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WO2015196887A1 - Technique de fusion d'étain à projection latérale continue - Google Patents

Technique de fusion d'étain à projection latérale continue Download PDF

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Publication number
WO2015196887A1
WO2015196887A1 PCT/CN2015/079916 CN2015079916W WO2015196887A1 WO 2015196887 A1 WO2015196887 A1 WO 2015196887A1 CN 2015079916 W CN2015079916 W CN 2015079916W WO 2015196887 A1 WO2015196887 A1 WO 2015196887A1
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WO
WIPO (PCT)
Prior art keywords
tin
zone
smelting
reduction
slag
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Ceased
Application number
PCT/CN2015/079916
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English (en)
Chinese (zh)
Inventor
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
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China ENFI Engineering Corp
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China ENFI Engineering Corp
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Filing date
Publication date
Application filed by China ENFI Engineering Corp filed Critical China ENFI Engineering Corp
Publication of WO2015196887A1 publication Critical patent/WO2015196887A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B25/00—Obtaining tin
    • C22B25/02—Obtaining tin by dry processes

Definitions

  • the invention relates to a continuous side blowing tin process.
  • 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.
  • 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.
  • 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
  • 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
  • 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.
  • 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.
  • 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.
  • the first oxygen-containing gas has a volume concentration of oxygen of 24% to 60%
  • the second oxygen-containing gas has a volume concentration of oxygen of 24% to 60%
  • the first fuel is selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas
  • 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.
  • the reducing agent is granular coal.
  • FIG. 1 is a cross-sectional view of a continuous side blowing tin cleaning apparatus in accordance with an embodiment of the present invention
  • FIG. 2 is a flow chart of a continuous lead smelting process in accordance with an embodiment of the present invention.
  • top and side blowing 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.
  • the first is bottom-blow steel, but the later developed top-blown steel is a technological 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.
  • top-blowing technology 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.
  • 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
  • the structure of the smelting equipment furnace type
  • the structure and arrangement of the spray gun are completely different.
  • 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.
  • 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 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:
  • 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;
  • 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;
  • the slag is intermittently discharged from the slag discharge port.
  • the continuous side blowing tinning apparatus 10 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.
  • 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.
  • 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. .
  • the continuous side blowing tinning apparatus 10 has the advantages of low energy consumption, good sealing performance, high environmental protection, simple structure, and easy operation.
  • 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.
  • the molten pool includes a portion located in the melting zone 10111 and a portion located in the reduction zone 10112.
  • 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.
  • 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.
  • L1 is the liquid surface of the slag
  • 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
  • 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%) %).
  • 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.
  • 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.
  • the structure of the continuous side blowing tinning apparatus 10 can be made more reasonable.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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
  • the second fuel may be selected from at least one of pulverized coal, natural gas, coke oven gas, and producer gas.
  • 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
  • the slag produced in the reduction zone 10112 can be discharged once every 1.5 hours to 2 hours.
  • 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.
  • a dust collector for example, a bag dust collector
  • 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.
  • tin-containing soot can be added to the melting zone 10111.
  • the tin-containing soot is not generated, the tin-containing material and the flux can be added to the melting zone 10111.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the meaning of "a plurality” is at least two, such as two, three, etc., unless specifically defined otherwise.
  • 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.
  • 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.
  • 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.

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Abstract

La présente invention se rapporte à une technique de fusion d'étain à projection latérale continue mise en œuvre à l'aide d'un appareil de fusion d'étain à projection latérale continue (10). La technique de fusion d'étain à projection latérale continue comprend les étapes suivantes consistant à : ajouter un matériau d'alimentation contenant de l'étain dans une zone de fusion (10111); utiliser un pistolet de pulvérisation (103) à projection latérale pour zone de projection afin de pulvériser depuis un côté de la zone de fusion (10111) un premier gaz contenant de l'oxygène et un premier combustible vers la partie d'un bain de fusion qui est dans la zone de fusion (10111) de manière à faire fondre le matériau d'alimentation contenant de l'étain et à produire un premier étain brut et des scories d'étain riche; ajouter un agent réducteur dans une zone de réduction (10112); utiliser un pistolet de pulvérisation (104) à projection latérale pour zone de réduction afin de pulvériser depuis un côté de la zone de réduction (10112) un second gaz contenant de l'oxygène et un second combustible vers la partie du bain de fusion qui est dans la zone de réduction (10112) de manière à réduire les scories d'étain riche qui se sont écoulées depuis la zone de fusion (10111) vers la zone de réduction (10112) et à produire un second étain brut et des secondes scories, le second étain brut s'écoulant de la zone de réduction (10112) vers la zone de fusion (10111); rejeter le premier étain brut et le second étain brut par une sortie de rejet d'étain (10114); rejeter de façon intermittente les scories par une sortie de rejet de scories (10119).
PCT/CN2015/079916 2014-06-25 2015-05-27 Technique de fusion d'étain à projection latérale continue Ceased WO2015196887A1 (fr)

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CN201410295163.7 2014-06-25
CN201410295163.7A CN104073655B (zh) 2014-06-25 2014-06-25 连续侧吹炼锡工艺

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CN110066917A (zh) * 2018-01-24 2019-07-30 中国瑞林工程技术有限公司 处理含铁物料的系统和方法
CN110172593A (zh) * 2019-06-13 2019-08-27 云南锡业股份有限公司铜业分公司 一种节能环保的锡冶炼系统及冶炼工艺
CN111500877A (zh) * 2020-06-10 2020-08-07 广东汉合有色金属有限公司 一种从锡箔祭品的锡箔灰中回收再生精锡的工艺方法
CN111663052A (zh) * 2020-07-13 2020-09-15 云南锡业股份有限公司锡业分公司 一种粗锡冶炼系统及工艺
CN113481382A (zh) * 2021-07-16 2021-10-08 云南锡业股份有限公司锡业分公司 一种含锡物料熔炼的系统及方法
CN113737016A (zh) * 2021-09-18 2021-12-03 安徽华铂再生资源科技有限公司 一种从锡酸钠溶液压滤固体物中冶炼粗锡的工艺

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CN104073655B (zh) * 2014-06-25 2017-01-11 中国恩菲工程技术有限公司 连续侧吹炼锡工艺
WO2015196888A1 (fr) * 2014-06-25 2015-12-30 中国恩菲工程技术有限公司 Appareil de fusion d'étain à souffle latéral continu
CN107201449B (zh) * 2017-06-08 2018-06-08 安徽省金鸿再生资源科技有限公司 一种含铅锡废渣回收锡的方法
CN109852818A (zh) * 2019-04-02 2019-06-07 柳州光华科技有限公司 一种连续侧吹炼锡工艺
CN116147336A (zh) * 2023-04-21 2023-05-23 中国恩菲工程技术有限公司 含硫多金属固废熔炼炉及其熔炼处理方法

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