CN215757546U - Cyaniding tailings metal recovery processing system - Google Patents
Cyaniding tailings metal recovery processing system Download PDFInfo
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- CN215757546U CN215757546U CN202121140784.XU CN202121140784U CN215757546U CN 215757546 U CN215757546 U CN 215757546U CN 202121140784 U CN202121140784 U CN 202121140784U CN 215757546 U CN215757546 U CN 215757546U
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Abstract
The utility model belongs to the technical field of metallurgy, and particularly discloses a cyanidation tailing metal recovery processing system which comprises a raw material bin, a pulping unit, a drying unit, a smelting unit and a smoke dust processing unit, wherein the pulping unit comprises a stirring tank and a water storage tank; the drying unit comprises a spray drying tower, and the spray drying tower is connected with the stirring tank; the smelting unit comprises a smelting furnace, the smelting furnace is provided with an air inlet, a feed inlet and an air outlet, the feed inlet is used for receiving smelting auxiliary materials and materials led out from the discharge end of the spray drying tower, and the air outlet is connected with the spray drying tower; the smoke dust processing unit comprises a first-stage heat exchanger and a second-stage heat exchanger, the first-stage heat exchanger and the second-stage heat exchanger are communicated with the air inlet, and the condensed water outlet end of the second-stage heat exchanger is connected with the water storage tank. The scheme makes full use of the high-temperature flue gas of the smelting furnace to dry materials, hot air after heat exchange provides combustion-supporting air for the smelting furnace, precipitated condensed water can also assist in pulping, the whole system realizes cyclic utilization of energy and resources, and energy is saved.
Description
Technical Field
The utility model belongs to the technical field of metallurgy, and particularly relates to a cyanidation tailing metal recovery processing system.
Background
At present, gold mine enterprises mostly adopt cyanidation gold extraction processes (the cyanidation gold extraction processes comprise full mud cyanidation gold extraction processes, flotation gold concentrate cyanidation gold extraction processes and low-grade gold ore dump leaching processes) to produce gold, and the cyanidation gold extraction processes generate a large amount of cyanidation tailings every year. The cyanide tailings are piled up and disposed, so that valuable metals such as gold, silver, copper, lead, zinc and the like contained in the cyanide tailings cannot be effectively recycled, a large amount of land is occupied, and the environment is seriously damaged.
In recent years, many methods have been tried to recover valuable metals in cyanidation tailings, but most of the methods have unsatisfactory effects, and the most promising method is the chlorination roasting method, which has the remarkable advantages of strong raw material adaptability, high process maturity, capability of comprehensively recovering various valuable metals and the like. However, the recovery of valuable metals by the roasting method requires a large amount of equipment, which results in the consumption of a large amount of energy, resource waste and high production cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a cyanidation tailing metal recovery processing system, which aims to solve the problems of high energy consumption, resource waste and high production cost.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a cyanidation tailings metal recovery processing system comprises a raw material bin, a pulping unit, a drying unit, a smelting unit and a smoke dust processing unit, wherein the pulping unit comprises a stirring tank and a water storage tank, and the raw material bin and the water storage tank are both communicated with the stirring tank; the drying unit comprises a spray drying tower, and the feed end of the spray drying tower is connected with the discharge end of the stirring tank; the smelting unit comprises a smelting furnace, the smelting furnace is provided with an air inlet, a feed inlet and an air outlet, the feed inlet is used for receiving smelting auxiliary materials and materials led out from the discharge end of the spray drying tower, and the air outlet is connected with the interior of the spray drying tower; the smoke dust treatment unit comprises a first-stage heat exchanger and a second-stage heat exchanger which are sequentially connected with the smoke gas discharge end of the spray drying tower, the gas outlet ends of the first-stage heat exchanger and the second-stage heat exchanger are communicated with the gas inlet of the smelting furnace, and the condensed water outlet end of the second-stage heat exchanger is connected with the water storage tank.
The principle of the scheme is as follows: during the use, add the water in cyanidation tailings and the water storage tank in the former feed bin and stir in the stirred tank, make the pulp with the cyanidation tailings, make the cyanidation tailings carry more easily to solve the cyanidation tailings and lead to the problem that the direct transport degree of difficulty is big that the bonding caused easily because of viscosity is big.
And then the slurry is pumped into a spray drying tower for drying, the moisture in the dried cyanide tailings is controlled, and cyanide in the cyanide tailings is effectively decomposed in the spray drying tower. In the drying process, the flue gas generated by the spray drying tower is discharged into the primary heat exchanger, the temperature of the flue gas is 200 ℃ after primary heat exchange, the flue gas enters the secondary heat exchanger for secondary heat exchange, the temperature of the flue gas is 50 ℃ after secondary heat exchange, hot air discharged after heat exchange of the primary heat exchanger and the secondary heat exchanger is led into the smelting furnace through the air inlet to provide combustion-supporting air for the smelting furnace so as to reduce fuel consumption, and condensed water separated out by the secondary heat exchanger returns to the water storage tank to realize reuse of the condensed water.
And adding the dried cyanidation tailings into a smelting furnace after pelletizing, simultaneously adding reducing coal, fluorite, quartz stone and copper concentrate for smelting, and obtaining a high-temperature melt after smelting, wherein the high-temperature melt comprises smelting slag and a crude copper alloy containing gold and silver. And the waste gas generated in the smelting furnace is discharged into the spray drying tower through the gas outlet to provide hot gas for the spray drying tower so as to reduce the consumption of a heat source.
This scheme make full use of smelting furnace's high temperature flue gas is dried the material to the moisture requirement that can appoint, supplies with the hot-air after the heat transfer smelting furnace, for the smelting furnace provides combustion-supporting wind, and the comdenstion water of appearing still can assist cyaniding tailings slurrying, and entire system realizes the cyclic utilization of energy and resource, has practiced thrift the energy, and the cyanide decomposes at the high temperature simultaneously, has solved the environmental protection problem. And the cyanide slag has large water content and large viscosity, so the cyanide slag is difficult to convey by a conventional conveying method, the problem of high difficulty in conveying the cyanide slag is solved by conveying the cyanide slag after pulping, and the working efficiency is high.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment including a dust separator and a desulfurization system.
Reference numerals in the drawings of the specification include: the device comprises a spray drying tower 1, a smelting furnace 2, a bag-type dust collector 3, a primary heat exchanger 4, a secondary heat exchanger 5, a raw material bin 6, a water storage tank 7, a stirring tank 8, a screw pump 9, a lime powder bin 10, a disc pelletizer 11, a desulfurizing tower 12, an annular partition plate 13, an air hole 14, a drying cavity 15 and an air spraying chamber 16.
Detailed Description
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships.
Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to fig. 1 to 2.
The embodiment provides a cyanidation tailings metal recovery processing system, which comprises a raw material bin 6, a pulping unit, a drying unit, a smelting unit and a smoke processing unit, wherein the pulping unit comprises a stirring tank 8 and a water storage tank 7, and the raw material bin 6 and the water storage tank 7 are both communicated with the stirring tank 8; the drying unit comprises a spray drying tower 1, and the feed end of the spray drying tower 1 is connected with the discharge end of the stirring tank 8; the smelting unit comprises a smelting furnace 2, the smelting furnace 2 is provided with an air inlet, a feed inlet and an air outlet, the feed inlet is used for receiving smelting auxiliary materials and materials led out from the discharge end of the spray drying tower 1, and the air outlet is connected with the interior of the spray drying tower 1; the smoke and dust processing unit includes one-level heat exchanger 4 and second grade heat exchanger 5 that link to each other in proper order with spray drying tower 1 flue gas discharge end, and the end of giving vent to anger of one-level heat exchanger 4, second grade heat exchanger 5 all communicates with the air inlet of smelting furnace 2, and 5 comdenstion water outlet ends of second grade heat exchanger link to each other with water storage tank 7.
Wherein, raw materials storehouse 6 is used for storing cyaniding tailings, and in the course of the work, cyaniding tailings are processed through slurrying unit, drying unit and smelting unit in proper order and are obtained high temperature melt, and the smoke and dust processing unit is then cooled down and is removed dust, desulfurization treatment with the flue gas that produces in the processing procedure.
The slurrying unit includes stirred tank 8 and water storage tank 7, and water storage tank 7 and former feed bin 6 all link to each other through the input port of pipe fitting with stirred tank 8, during the use, add cyaniding tailings and water to stirred tank 8 according to certain proportion, then start stirred tank 8 and stir cyaniding tailings and water, make pulp material with cyaniding tailings and water.
The drying unit includes spray drying tower 1, and spray drying tower 1 links to each other with 8 discharge ends of stirred tank, and still is equipped with feeding mechanism between spray drying tower 1 and the stirred tank 8, and specifically, feeding mechanism is screw pump 9, and screw pump 9 communicates spray drying tower 1 and stirred tank 8 through the pipe fitting. When feeding is needed, the screw pump 9 is started to convey the slurry in the stirring tank 8 to the spray drying tower 1.
Referring to fig. 2, in some embodiments, an annular partition 13 is further disposed in the spray drying tower 1, the annular partition 13 is fixedly disposed in the middle of the spray drying tower 1, a large gap is formed between the outer side of the annular partition 13 and the inner wall of the spray drying tower 1 to form an interlayer space, the interlayer space is a drying chamber 15, a feed inlet of the spray drying tower 1 is connected to the drying chamber 15, and the slurry enters the spray drying tower 1 and is atomized and then enters the drying chamber 15. An air spraying chamber 16 is arranged in the annular partition plate 13, a hot air outlet of the spray drying tower 1 is positioned in the air spraying chamber 16, a plurality of air holes 14 are further formed in the annular partition plate 13, and the air holes 14 are communicated with the air spraying chamber 16 and the drying cavity 15.
When the drying device is used, slurry is introduced into the spray drying tower 1 to be atomized and then enters the drying cavity 15, hot gas is introduced into the air spraying chamber 16, then the hot gas is sprayed into the drying cavity 15 through the air holes 14 in the annular partition plate 13, and the atomized slurry is dried in the drying cavity 15 by the hot gas. Compare in current spray drying tower 1, this structure can be sprayed into hot gas from dispersion all around to drying chamber 15, makes the material drying more comprehensive, and drying effect is better. In addition, the cyanide is effectively decomposed at high temperature, so that the decomposition of the cyanide can be completed more comprehensively by the dispersion drying method.
The smelting unit comprises a smelting furnace 2, wherein the smelting furnace 2 is provided with a gas inlet, a feed inlet and a gas outlet, the gas inlet is used for supplementing combustion-supporting gas, the feed inlet is used for introducing cyaniding tailings and other smelting auxiliary materials, and the gas outlet is used for discharging flue gas generated in the smelting process.
Specifically, referring to fig. 1, a conveyer belt structure is arranged at the feed inlet, and materials to be smelted are fed into the smelting furnace 2 through the conveyer belt, so that the smelting auxiliary materials such as reduced coal, fluorite, quartz stone and copper concentrate are conveyed in addition to the cyaniding tailings. Still be equipped with the granulation unit before the 2 feed inlets of smelting furnace, the granulation unit includes disc pelletizer 11 and lime powder storehouse 10, and during the pelletization, add disc pelletizer 11 with cyanidation tailings after the spray drying tower 1 drying and the lime powder in the lime powder storehouse 10, then start disc pelletizer 11 and pelletize can. During smelting, the granulated cyanidation tailings are added into a smelting furnace 2 along with the reduced coal, fluorite, quartz stone and copper concentrate, and the smelting furnace 2 is controlled to be at about 1200 ℃ for smelting.
And the gas outlet of the smelting furnace 2 is communicated with the gas spraying chamber 16 of the spray drying tower 1 through a pipe fitting, and in the working process, high-temperature flue gas generated by the smelting furnace 2 is introduced into the gas spraying chamber 16 to provide high-temperature gas for the spray drying tower 1 so as to reduce heat source consumption and realize energy recycling.
Referring to fig. 1, the smoke dust treatment unit comprises a heat exchanger connected with a spray drying tower 1, the air outlet end of the heat exchanger is communicated with the air inlet of a smelting furnace 2, and condensed water of the heat exchanger is led into a water storage tank 7. In the drying process, the flue gas generated by the spray drying tower 1 is discharged into the heat exchanger, the temperature of the flue gas is controlled below 50 ℃ by the heat exchanger, hot air after heat exchange is introduced into the smelting furnace 2 through the air inlet to provide combustion-supporting air for the smelting furnace 2 so as to reduce fuel consumption, and condensed water separated out after heat exchange returns to the water storage tank 7 to realize water recycling.
Referring to fig. 1, in some embodiments, the smoke treatment unit includes two heat exchangers, i.e., a primary heat exchanger 4 and a secondary heat exchanger 5, a dust remover is connected between the primary heat exchanger 4 and the secondary heat exchanger 5, and a desulfurization system is connected to an exhaust end of the secondary heat exchanger 5, wherein the primary heat exchanger 4 is directly connected to an air outlet of the spray drying tower 1, and the dust remover, the secondary heat exchanger 5 and the desulfurization system are sequentially connected. When the flue gas desulfurization device is used, high-temperature flue gas enters the primary heat exchanger 4, the temperature of the flue gas is reduced to be lower than 200 ℃ by the primary heat exchanger 4, then the flue gas enters the dust remover again for dust removal treatment, the flue gas after dust removal enters the secondary heat exchanger 5 for heat exchange again, the temperature of the flue gas is reduced to be lower than 50 ℃, and finally the flue gas is introduced into a desulfurization system through the induced draft fan to be desulfurized and discharged after reaching the standard. Wherein, the dust remover is a bag-type dust remover 3, and the desulfurization system comprises two desulfurization towers 12 which are connected in sequence.
Wherein, the hot air outlet end of the first-stage heat exchanger 4 and the second-stage heat exchanger 5 is connected with the air inlet of the smelting furnace 2 through a pipe fitting, so that the hot air after heat exchange provides combustion-supporting air for the smelting furnace 2 to reduce fuel consumption, and the condensation separated out by the second-stage heat exchanger 5 is led into the water storage tank 7 again for preparing slurry.
Based on the structure, when in use, the cyanidation tailings and water are added into the stirring tank 8 and stirred to prepare slurry, then the slurry is sprayed into the spray drying tower 1 by the screw pump 9, the cyanidation tailings are dried, the material is dried to meet the requirement of granulation moisture, and the temperature of the outlet of the spray drying tower 1 is controlled to be above 900 ℃. And granulating the dried cyanide slag by using a disc pelletizer 11, feeding the granulated cyanide slag into a smelting furnace 2 along with reduced coal, fluorite, quartz stone and copper concentrate for smelting, and obtaining a high-temperature melt after smelting, wherein the high-temperature melt comprises smelting slag and crude copper alloy containing gold and silver. During this period, the temperature of the melting furnace 2 is controlled to be about 1200 ℃.
In the working process, cyanide is completely decomposed in the spray drying tower 1 when the temperature is controlled to be above 900 ℃, the dried flue gas enters the primary heat exchanger 4 for heat exchange, the hot air after heat exchange provides combustion-supporting air for the smelting furnace 2 to reduce fuel consumption, the temperature of the flue gas after heat exchange is reduced to 200 ℃, the flue gas enters the bag-type dust remover 3 for dust removal, the flue gas after dust removal enters the secondary heat exchanger 5 for heat exchange, the temperature of the flue gas after heat exchange is 50 ℃, and the flue gas is introduced into the desulfurizing tower 12 through the induced draft fan for desulfurization and then is discharged after reaching the standard. After heat exchange, condensate water is separated out, the separated condensate water returns to the water storage tank 7 to carry out pulping on cyaniding tailings, and hot air after heat exchange returns to the smelting furnace 2 to provide combustion-supporting air.
The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (6)
1. The utility model provides a cyanidation tailings metal recovery processing system which characterized in that: the device comprises a raw material bin (6), a pulping unit, a drying unit, a smelting unit and a smoke dust treatment unit, wherein the pulping unit comprises a stirring tank (8) and a water storage tank (7), and the raw material bin (6) and the water storage tank (7) are communicated with the stirring tank (8); the drying unit comprises a spray drying tower (1), and the feed end of the spray drying tower (1) is connected with the discharge end of the stirring tank (8); the smelting unit comprises a smelting furnace (2), the smelting furnace (2) is provided with an air inlet, a feed inlet and an air outlet, the feed inlet is used for receiving smelting auxiliary materials and materials led out from the discharge end of the spray drying tower (1), and the air outlet is connected with the interior of the spray drying tower (1); the smoke and dust processing unit includes one-level heat exchanger (4) and second grade heat exchanger (5) that link to each other in proper order with spray drying tower (1) flue gas discharge end, and the end of giving vent to anger of one-level heat exchanger (4), second grade heat exchanger (5) all communicates with the air inlet of smelting furnace (2), and second grade heat exchanger (5) comdenstion water play water end links to each other with water storage tank (7).
2. The cyanidation tailings metal recovery processing system of claim 1, wherein: an annular partition plate (13) is arranged in the spray drying tower (1), a drying cavity (15) is arranged between the outer side of the annular partition plate (13) and the inner wall of the spray drying tower (1), an air spraying chamber (16) is arranged on the inner side of the annular partition plate (13), and a plurality of air holes (14) are formed in the annular partition plate (13).
3. The cyanidation tailings metal recovery processing system of claim 1 or 2, wherein: a dust remover is connected between the primary heat exchanger (4) and the secondary heat exchanger (5), and the exhaust end of the secondary heat exchanger (5) is connected with a desulfurization system.
4. The cyanidation tailings metal recovery processing system of claim 3, wherein: the desulfurization system comprises two desulfurization towers (12) which are connected in sequence.
5. The cyanidation tailings metal recovery processing system of claim 1, 2 or 4, wherein: still include the granulation unit, the granulation unit includes disc pelletizer (11) and lime powder storehouse (10) that link to each other with disc pelletizer (11), and spray drying tower (1) discharge end, lime powder storehouse (10) all link to each other with the feed end of disc pelletizer (11), and disc pelletizer (11) discharge end links to each other with smelting furnace (2) feed inlet.
6. The cyanidation tailings metal recovery processing system of claim 1, 2 or 4, wherein: a feeding mechanism is arranged between the stirring tank (8) and the spray drying tower (1), and the feeding mechanism is a screw pump (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121140784.XU CN215757546U (en) | 2021-05-26 | 2021-05-26 | Cyaniding tailings metal recovery processing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121140784.XU CN215757546U (en) | 2021-05-26 | 2021-05-26 | Cyaniding tailings metal recovery processing system |
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| CN215757546U true CN215757546U (en) | 2022-02-08 |
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| CN202121140784.XU Active CN215757546U (en) | 2021-05-26 | 2021-05-26 | Cyaniding tailings metal recovery processing system |
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- 2021-05-26 CN CN202121140784.XU patent/CN215757546U/en active Active
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