CN212199376U - System for efficiently recovering valuable metals in tin secondary raw materials - Google Patents
System for efficiently recovering valuable metals in tin secondary raw materials Download PDFInfo
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- CN212199376U CN212199376U CN202020549929.0U CN202020549929U CN212199376U CN 212199376 U CN212199376 U CN 212199376U CN 202020549929 U CN202020549929 U CN 202020549929U CN 212199376 U CN212199376 U CN 212199376U
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Abstract
A system for efficiently recovering valuable metals in a tin secondary raw material. The system comprises a batching system (1), a rotary smelting furnace (4), a vacuum furnace (5), a fuming furnace (6) and a flue gas treatment system (7) which are arranged in a unified field; the material mixing hopper of the batching system is connected with a rotary smelting furnace (4) through a feeding mechanism, the rotary smelting furnace is directly or indirectly connected with a vacuum furnace (5), a fuming furnace (6) and a flue gas treatment system (7) respectively, the rotary smelting furnace is connected with the vacuum furnace through an alloy ingot transfer device, the rotary smelting furnace is connected with the fuming furnace through a slag transfer device, and the smoke outlets of the rotary smelting furnace and the fuming furnace are connected with the flue gas treatment system. The utility model discloses can high-efficient recovery composition complicated tin secondary raw materials, abundant recycle tin, lead, bismuth, indium, silver, copper etc. valuable metals that wherein contain, the flow is short, easy operation, and the operating cost is low, and the valuable metal rate of recovery is high, and is energy-conserving, environmental protection is effectual.
Description
Technical Field
The utility model relates to a retrieve system technical field of valuable metal in follow tin secondary raw materials.
Background
With the gradual reduction of the primary resources of tin mines, the recycling of the secondary raw material of tin is more and more emphasized, and the secondary raw material of tin gradually becomes one of the sources for providing tin and other valuable metals in the future. The secondary raw material of tin refers to various materials which can regenerate and recover tin, such as tin-containing slag, tin-containing waste, tin-containing smoke dust, tin anode mud, yellow slag, tin mud and the like, so far, the research on the technology for recycling the secondary raw material of tin is less, the conventional technology and configuration are generally adopted, the secondary raw material of tin is smelted together with tin concentrate, the flow is long, valuable metals are easy to disperse, the recovery rate is low, and the effect is poor.
The method for producing crude tin by smelting the secondary raw material of tin together with tin concentrate generally comprises two main smelting production process steps, wherein the first step is to smelt the tin concentrate and the secondary raw material into crude tin and tin-rich slag, and the second step is to smoke and thin the tin-rich slag to recover tin and produce poor slag.
The traditional smelting process of the secondary raw material of tin by matching tin concentrate is to smelt tin concentrate in a blast furnace, a reverberatory furnace, an electric furnace and the like to produce crude tin and simultaneously produce tin-rich slag. The smelting furnace tin-rich slag is subjected to fuming, dilution and recovery of tin smoke dust by a side-blown fuming furnace and the like. Blast furnace smelting belongs to the backward productivity and is basically eliminated at present. The reverberatory furnace and the electric furnace are still secondary raw materials matched with tin concentrate smelting equipment using more tin at present, and are characterized by simple process method, small scale, high energy consumption, high labor intensity, more production links, serious environmental pollution and high safety risk.
In recent 20 years, the tin strengthening smelting technology has greatly advanced, and tin smelting efficiency is greatly improved by adding tin smelting and oxygen enrichment in an Ausmelt top-blown furnace. The Ausmelt top-blown immersion smelting method belongs to the field of molten pool smelting, is widely applied to the fields of copper, tin, lead, steel and the like, and develops rapidly in the last 20 years. The top-blown immersion smelting method technology has the advantages of high smelting concentration, good furnace body sealing performance, good workshop environment-friendly conditions, simple structure, simple material preparation, relatively low investment and the like. However, the method has the defects that the slag produced by smelting needs to be treated separately by a fuming furnace, the production links are multiple, the process and the facility are complex, the discontinuous operation is realized, the production efficiency is low, the energy consumption is high, and the tin recovery rate is low.
At present, tin-rich slag in tin smelting is mainly fuming, volatilizing, diluting and recovering tin smoke dust by a vulcanization method of a box-type side-blown fuming furnace. The box type side-blown fuming furnace is also growing in size, from the past 2.6m2The furnace type is mainly developed to 4m2The furnace type is the main one, and some manufacturers have tried to adopt 8m2A furnace-type box-type side-blown fuming furnace. The box type side-blown fuming furnace has the main advantages of high volatilization efficiency and high speed of tin. But the main defects are that the operation is interrupted, the slag generated by the smelting furnace needs to be added intermittently, the processes of cooling, conveying, heating and the like exist, the flow is long, the operation is complex, the safety and environmental protection risks are high, and the energy consumption is high.
The equipment and the method not only have complex equipment, large total investment and complex process, but also have a common problem of more production links, long flow, easy dispersion of valuable metals in the tin secondary raw material, long time consumption, low production efficiency, low recovery rate, high energy consumption and poor effect.
Disclosure of Invention
The utility model aims at solving the problem of above-mentioned tin secondary raw materials recovery system, provide one kind and can high-efficiently retrieve valuable metal among the tin secondary raw materials, and equipment structure and easy operation, valuable metal rate of recovery are high, the energy consumption is low, environmental protection, safe system and smelting technology.
The purpose of the utility model is realized through the following technical scheme:
a system for efficiently recovering valuable metals in tin secondary raw materials comprises a batching system, a rotary smelting furnace, a vacuum furnace, a fuming furnace and a flue gas treatment system which are arranged in a unified field; the batching system comprises a group of raw material bins arranged in parallel and a mixture hopper arranged below the raw material bins; the mixture hopper is connected with the rotary smelting furnace through a feeding mechanism and feeds the mixture into the rotary smelting furnace; the rotary smelting furnace is connected with the vacuum furnace, the fuming furnace and the flue gas treatment system respectively and directly or indirectly, the rotary smelting furnace is connected with the vacuum furnace indirectly through an alloy ingot transfer device, alloy produced by smelting in the rotary smelting furnace is cast into ingots and then is sent into the vacuum furnace to recover valuable metals, the rotary smelting furnace is connected with the fuming furnace through a slag transfer device, and slag produced by smelting in the rotary smelting furnace is sent into the fuming furnace to be vulcanized, volatilized and tin is recovered; the smoke outlet of the rotary smelting furnace is connected with the smoke treatment system through a smoke pipeline, the smoke outlet of the rotary smelting furnace is also connected with the smoke treatment system through a smoke pipeline, the smoke treatment system comprises a smoke cooler, a cloth bag dust collector, a tail gas desulfurization system and a chimney, which are sequentially connected through pipelines, and the smoke pipeline is introduced into an air inlet of the smoke cooler.
The utility model discloses can send into tin secondary raw material into rotation smelting furnace earlier and smelt into alloy and slag, send into the alloy vacuum furnace multilevel processing and retrieve various valuable metals one by one, send into the slag fuming furnace and handle the recovery tin, unified flue gas that sends into rotation smelting furnace and fuming furnace production and handle the back emission up to standard. Compared with the prior art, the utility model has the main advantages that:
(1) the utility model discloses a pyrometallurgical system can high-efficiently retrieve multiple valuable metals such as tin, lead, bismuth, indium, silver, copper that contain in the tin secondary raw materials, and the flow is short, easy operation, and the operating cost is low, and the energy consumption is low, and safety and environmental protection are good.
(2) The utility model discloses to smelt the flue gas centralized processing that produces with fuming, the low and high efficiency of treatment cost, after cooling and gathering dust, low concentration SO in the tail gas2And finally, the tail gas can be discharged up to the standard after desulfurization treatment.
(3) The utility model discloses equipment is simple, compact structure, and occupation of land is few, and the construction investment is low, and is high-efficient practical.
The utility model discloses carry out reasonable combination with prior art equipment, found the system that can directly retrieve valuable metal in the tin secondary raw materials high-efficiently, realized the technology of valuable metal in the direct high-efficiently recovery tin secondary raw materials, abandoned the method that prior art smelted the secondary raw materials collocation tin concentrate of tin together, effectively solved that prior art equipment is complicated, the total investment is big, the technology is complicated, the production link is many, the procedure is long, valuable metal among the tin secondary raw materials is easily dispersed, the rate of recovery is low, the high scheduling problem of energy consumption.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
As shown in figure 1, it is the system for recovering valuable metals in tin secondary raw materials with high efficiency of the utility model, including a batching system 1, a rotary smelting furnace 4, a vacuum furnace 5, a fuming furnace 6 and a flue gas treatment system 7 which are arranged in a unified field. The batching system comprises a group of raw material bins 2 and a mixture hopper 3, wherein the raw material bins 2 and the mixture hopper 3 are arranged in parallel. The mixture hopper is connected with the rotary smelting furnace 4 through a feeding mechanism 12, and feeds the mixture into the rotary smelting furnace, wherein the feeding mechanism can be a feeding pipeline or a feeding car; the rotary smelting furnace 4 is respectively directly or indirectly connected with the vacuum furnace 5, the fuming furnace 6 and the flue gas treatment system 7, the rotary smelting furnace 4 is indirectly connected with the vacuum furnace 5 through an alloy ingot transfer device 14, alloy smelted by the rotary smelting furnace is poured into a casting mold 13 to form an alloy ingot, the alloy ingot is fed into the vacuum furnace 5 through the alloy ingot transfer device 14 to recover valuable metal, the rotary smelting furnace 5 is connected with the fuming furnace 6 through a slag transfer device 15, and slag smelted by the rotary smelting furnace is fed into the fuming furnace 6 to be vulcanized and volatilized to recover tin; the smoke outlet of the rotary smelting furnace 4 is connected with the smoke treatment system 7 through a smoke pipeline, the smoke outlet of the fuming furnace 6 is also connected with the smoke treatment system 7 through a smoke pipeline, the smoke treatment system 7 comprises a smoke cooler 8, a cloth bag dust collector 9, a tail gas desulfurization system 10 and a chimney 11 which are sequentially connected through pipelines, and the smoke pipeline is communicated with an air inlet of the smoke cooler 8.
A set of raw materials feed bin 2 stores various materials such as tin secondary raw materials (including tin anode mud, yellow sediment, tin mud etc.), flux, reductant respectively in every feed bin, the feed bin adopts prior art's automatic weighing and control feed bin, can purchase in the market, has automatic weighing mechanism at every feed bin discharge gate, can carry out automatic weighing and control to the ejection of compact. The mixture hopper 3 arranged below the raw material bins is connected with the raw material bins through feeding pipelines, so that the raw materials are automatically conveyed in a closed mode, and the device is clean, efficient and environment-friendly. The discharge of each raw material bin is determined according to the charge proportion set by the smelting process of the rotary smelting furnace, and after entering the mixture hopper 3, the discharge is fed into the rotary smelting furnace 4 through the feeding mechanism. The feeding mechanism is a movable feed hopper with a switch at the bottom and the rotary smelting furnace 4 is a prior art device, such as
Provided is a rotary smelting furnace. The rotary smelting furnace is provided with a combustion system, an exhaust system, a slag raking-out device, an alloy pouring-out device and the like. The vacuum furnace 5, the fuming furnace 6, the flue gas cooler 8, the cloth bag dust collector 9 and the tail gas desulfurization system 10 are all devices in the prior art. The vacuum furnace is an internally heated vacuum furnace which is provided with a group of materials with the daily treatment of 10 tons, 20 tons, 30 tons and 50 tons and is provided with a feeding system, a water supply system, a negative pressure system and the like. The fuming furnace is a 4m2 box-type fuming furnace in the prior art and is provided with a feeding device, an air supply and coal supply device, a flue gas waste heat utilization device and a poor slag discharge device.
The method for efficiently recovering valuable metals in the tin secondary raw material by adopting the system shown in figure 1 is to feed the tin secondary raw material into the system firstlyThe rotary smelting furnace smelts alloy and slag, send alloy into the vacuum furnace multistage processing and retrieve various valuable metals one by one, send the slag into the fuming furnace and handle and retrieve tin, send the flue gas that rotary smelting furnace and fuming furnace produced into flue gas processing system and handle the back emission of reaching standard. The specific process is as follows: the tin secondary raw materials such as tin anode mud, yellow slag, tin mud and the like, as well as a fusing agent, a reducing agent and the like which are respectively stored in the raw material bins 2 are fed into a mixture hopper 3 according to a set proportion for proportioning, then the proportioning is automatically added into a rotary smelting furnace 4 through a feeding mechanism, fuel, air, oxygen and the like required by smelting are sprayed into a combustion system of the rotary smelting furnace for smelting, after the smelting of each furnace is finished, the rotary smelting furnace is tilted, the furnace slag is taken out to a furnace slag receiving device, the furnace slag is fed into a fuming furnace 6 through a furnace slag transferring device for vulcanizing volatilization to recover the tin, and lean furnace slag after the tin is recovered is discharged out of. Pouring all the alloy into a casting die to cast into an alloy ingot, conveying the alloy obtained by smelting into a vacuum furnace 5 through an alloy ingot transfer device, and respectively recovering tin, lead, bismuth, indium, silver and copper step by the vacuum furnace according to the difference of the boiling points of various valuable metals contained in the alloy. The boiling point of bismuth in the alloy is 1560 ℃, which is the lowest, and bismuth is firstly volatilized and recovered in one-time vacuum; the boiling point of the lead is 1749 ℃, the discharge time is low, and the lead is volatilized and recovered in the second step; boiling point of indium is 2080 ℃, discharging the third step, volatilizing and recovering the indium in the third step; the boiling point of silver is 2212 ℃, the boiling point of tin is 2260 ℃, and the fourth step is carried out to obtain the tin-silver alloy which is used for preparing silver-containing solder; the copper remaining had a boiling point of 2562 ℃ and was recovered from the final volatile residue. The flue gas discharged from the tops of the rotary smelting furnace 4 and the fuming furnace 6 uniformly enters a flue gas treatment system 7 through a flue gas discharge pipeline, the flue gas is cooled by a flue gas cooler 8, the tin-containing flue gas is recovered by a cloth bag dust collector 9, and then the low-concentration SO is separated out through a tail gas desulfurization system 102And the tail gas reaching the standard is discharged from a chimney 11. The recovery rates of tin, lead, bismuth, indium, silver and copper respectively reach more than 98%, 95%, 96%, 90%, 95% and 90%, and the recovery cost is reduced by 20% compared with the prior art. The operation and control of the rotary smelting furnace 4, the vacuum furnace 5, the fuming furnace 6, the flue gas cooler 8, the bag-type dust collector 9, the tail gas desulfurization system 10 and other equipment are carried out according to the operation process specifications of all the equipment, the prior art is adopted, and the technical scheme is used in the field of the technologyAll can be operated by the skilled person.
The utility model discloses equipment and device mentioned, if the feed proportioning system 1, rotation smelting furnace 4, vacuum furnace 5, fuming furnace 6, flue gas processing system 7, feeding mechanism 12, alloy ingot transfer device 14, slag transfer device 15 etc. that contain raw materials feed bin 2 and mixture hopper 3 are prior art equipment and device.
The utility model discloses system's equipment input cost is low, compact structure, process flow are short, can directly high-efficiently retrieve tin, lead, bismuth, indium, multiple valuable metals such as silver, copper that contain in the tin secondary raw materials and the rate of recovery is high. The system has simple operation, low operation cost, low energy consumption, safety and good environmental protection condition.
Claims (1)
1. A system for efficiently recovering valuable metals in secondary tin raw materials is characterized by comprising a batching system (1), a rotary smelting furnace (4), a vacuum furnace (5), a fuming furnace (6) and a flue gas treatment system (7) which are arranged in a unified field; the batching system comprises a group of raw material bins (2) arranged in parallel and a mixture hopper (3) arranged below the raw material bins; the mixture hopper is connected with the rotary smelting furnace (4) through a feeding mechanism (12) and feeds the mixture into the rotary smelting furnace; the rotary smelting furnace (4) is directly or indirectly connected with the vacuum furnace (5), the fuming furnace (6) and the flue gas treatment system (7) respectively, the rotary smelting furnace (4) is indirectly connected with the vacuum furnace (5) through an alloy ingot transfer device (14), alloy produced by smelting in the rotary smelting furnace is cast into ingots, then the ingots are fed into the vacuum furnace (5) to recover valuable metals, the rotary smelting furnace (4) is connected with the fuming furnace (6) through a slag transfer device (15), and slag produced by smelting in the rotary smelting furnace is fed into the fuming furnace (6) to be vulcanized and volatilized to recover tin; the smoke outlet of the rotary smelting furnace (4) is connected with the smoke treatment system (7) through a smoke pipeline, the smoke outlet of the rotary smelting furnace (6) is also connected with the smoke treatment system (7) through a smoke pipeline, the smoke treatment system (7) comprises a smoke cooler (8), a cloth bag dust collector (9), a tail gas desulfurization system (10) and a chimney (11) which are sequentially connected through pipelines, and the smoke pipeline is communicated with an air inlet of the smoke cooler (8).
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| CN202020549929.0U CN212199376U (en) | 2020-04-15 | 2020-04-15 | System for efficiently recovering valuable metals in tin secondary raw materials |
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| CN202020549929.0U CN212199376U (en) | 2020-04-15 | 2020-04-15 | System for efficiently recovering valuable metals in tin secondary raw materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321301A (en) * | 2020-04-15 | 2020-06-23 | 云南锡业股份有限公司铜业分公司 | System and method for efficiently recovering valuable metals in tin secondary raw materials |
| GB2601212A (en) * | 2020-04-15 | 2022-05-25 | Copper Branch Company Of Yunnan Tin Company Ltd | System and method for efficient recovery of valuable metals from tin secondary raw materials |
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2020
- 2020-04-15 CN CN202020549929.0U patent/CN212199376U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111321301A (en) * | 2020-04-15 | 2020-06-23 | 云南锡业股份有限公司铜业分公司 | System and method for efficiently recovering valuable metals in tin secondary raw materials |
| WO2021208357A1 (en) * | 2020-04-15 | 2021-10-21 | 云南锡业股份有限公司铜业分公司 | System and method for efficient recovery of valuable metals from tin secondary raw materials |
| GB2601212A (en) * | 2020-04-15 | 2022-05-25 | Copper Branch Company Of Yunnan Tin Company Ltd | System and method for efficient recovery of valuable metals from tin secondary raw materials |
| GB2601212B (en) * | 2020-04-15 | 2024-03-13 | Copper Branch Company Of Yunnan Tin Company Ltd | A system applied to efficiently recycle valuable metals from secondary raw materials of tin and its method |
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