Zinc kiln slag treatment device

Abstract

The utility model provides a zinc kiln slag treatment device. The zinc kiln slag treatment device comprises a zinc smelting device, a crushing device, a powder bin, a ball mill, a size mixing pool, a magnetic separator, a cyclone and an ore dressing device which are sequentially connected in series. According to the device, the crushing device is arranged to crush the zinc kiln slag discharged by the zinc smelting device, the ball mill is arranged to grind the crushed kiln slag into fine ore pulp, then the ore pulp is mixed in the pulp mixing pool and then enters the magnetic separator to separate iron ore concentrate in the ore pulp, and then the ore pulp subjected to magnetic separation is introduced into the hydrocyclone to be graded according to the specific gravity; according to the device, the iron ore concentrate, the carbon ore concentrate and the silver ore concentrate in the zinc kiln slag are separated and recycled respectively through cooperative use of the equipment, mineral resources in the kiln slag are recycled, the iron ore concentrate, the carbon ore concentrate and the silver ore concentrate in the kiln slag are recycled, and the iron ore concentrate, the carbon ore concentrate and the silver ore concentrate in the kiln slag are recycled. The defect that mineral resources in the zinc kiln slag cannot be fully recycled in a traditional treatment mode, so that the mineral resources are wasted is overcome.

Description

Technical Field

[0001] The present application relates to the technical field of kiln slag treatment, and in particular to a zinc kiln slag treatment device. Background Art

[0002] Zinc kiln slag is a residue formed by adding about 45% to 55% coke to the leaching slag of hydrometallurgical zinc smelting, and then reducing it at 1100 to 1300℃ in a rotary kiln using the Wiltz rotary kiln method to volatilize metals such as zinc and lead, and then quenching it with water. Since the added coke is not fully burned in the rotary kiln, some coke remains in the zinc kiln slag. At the same time, the kiln slag is also enriched with some unvolatile zinc and lead, as well as rare and precious metals such as gold, silver, copper, gallium, germanium, and indium contained in the leaching slag. Therefore, zinc kiln slag is a secondary resource with extremely high comprehensive recovery value.

[0003] Traditional treatment methods are mainly stockpiling or landfilling, which not only occupies a large amount of land, but also causes serious environmental pollution. Zinc kiln slag is also used as a building material for paving roads, as cement filler, filling or backfilling the goaf formed by mining, etc. However, this method does not fully recover the valuable metals in the zinc kiln slag, resulting in a waste of mineral resources. Utility Model Content

[0004] The present application provides a zinc kiln slag treatment device, which is used to solve the problem that the existing method of treating zinc kiln slag fails to fully recycle the zinc kiln slag, resulting in waste of mineral resources in the zinc kiln slag.

[0005] The present application provides a zinc kiln slag treatment device, comprising a zinc smelting device, a crushing device, a powder bin, a ball mill, a slurry mixing tank, a magnetic separator, a cyclone and a ore dressing device connected in series in sequence;

[0006] The cyclone is also connected to the feeding end of the ball mill;

[0007] The ore dressing device is connected to the carbon concentrate storage bin and the silver concentrate storage bin respectively;

[0008] The magnetic separator is also connected to the iron ore concentrate slurry processing device and the iron ore concentrate storage bin in sequence.

[0009] Optionally, the crushing device comprises a bin screen, a first conveyor belt, a vibrating screen and a second conveyor belt connected in series in sequence;

[0010] The bin screen is connected to the first crusher, and the first conveyor belt is arranged below the first crusher to receive the crushed material from the first crusher;

[0011] The vibrating screen is connected to the second crusher, and the second conveyor belt is arranged below the second crusher to receive the crushed material from the second crusher;

[0012] The bin grid screen is connected to the zinc smelting device, and the second conveyor belt is connected to the powder bin;

[0013] The crushing particle size of the second crusher is smaller than the crushing particle size of the first crusher.

[0014] Optionally, the mineral processing device comprises a first stirring barrel, a carbon flotation machine, a second stirring barrel and a silver flotation machine connected in series in sequence;

[0015] The carbon flotation machine is also connected in sequence to the first thickener, the carbon concentrate filter and the carbon concentrate storage bin;

[0016] The silver flotation machine is also connected in sequence to the second thickener, the silver concentrate filter and the silver concentrate storage bin.

[0017] Optionally, the iron concentrate slurry processing device includes an iron concentrate filter and a recovery magnetic separator connected to each other;

[0018] The iron concentrate filter is connected to the iron concentrate storage bin;

[0019] The recovery magnetic separator is also connected to the second thickener.

[0020] Optionally, the silver flotation machine is also connected to a tailings magnetic separator;

[0021] The tailings magnetic separator is connected to the tailings thickener, tailings filter and tailings bin in sequence;

[0022] The tailings magnetic separator is also connected to the iron ore concentrate filter.

[0023] Optionally, a belt iron remover is installed above the first conveyor belt near the output end.

[0024] Optionally, the zinc smelting device includes a rotary kiln and a grate cooler;

[0025] The exhaust end at the top of the grate cooler is connected to the chimney, the lower end of the chimney is connected to the heat exchanger through a fan, and the heat exchanger is connected to the heat pump and the upper end of the chimney in turn.

[0026] The present application provides a zinc kiln slag method, which crushes the zinc kiln slag discharged from a zinc smelting device by arranging a crushing device, and arranging a ball mill to grind the crushed kiln slag into fine slurry, and then the slurry is mixed in a slurry mixing pool and then enters a magnetic separator to separate the iron concentrate in the slurry, and then the slurry after magnetic separation is passed into a cyclone to classify the slurry according to specific gravity, and the light slurry on the upper part of the cyclone is passed through a ore dressing device to separate the carbon concentrate and the silver concentrate in the slurry. The device of the present application, through the coordinated use of the above-mentioned equipment, can separate and recover the iron concentrate, carbon concentrate and silver concentrate in the zinc kiln slag, and recover the mineral resources in the kiln slag, thereby overcoming the disadvantage of the waste of mineral resources caused by the inability to fully recover the mineral resources in the zinc kiln slag in the traditional treatment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of a zinc kiln slag treatment device provided in one embodiment of the present application;

[0029] Figure 2 A schematic diagram of a crushing device provided in one embodiment of the present application;

[0030] Figure 3 A schematic diagram of a zinc kiln slag treatment device provided in another embodiment of the present application;

[0031] Figure 4 A schematic diagram of a zinc kiln slag treatment device provided in yet another embodiment of the present application;

[0032] Figure 5 A schematic diagram of a zinc kiln slag treatment device provided in yet another embodiment of the present application;

[0033] Figure 6 A schematic diagram of a crushing device provided in another embodiment of the present application;

[0034] Figure 7 A schematic diagram of a zinc kiln slag treatment device provided in one embodiment of the present application;

[0035] Description of reference numerals:

[0036] 1. Zinc smelting device; 2. Crushing device; 3. Powder bin; 4. Ball mill; 5. Slurry mixing tank; 6. Magnetic separator; 7. Cyclone; 8. Ore dressing device; 9. Carbon concentrate storage bin; 10. Silver concentrate storage bin; 11. Rotary kiln; 12. Grate cooler; 21. Bin screen; 22. First conveyor belt; 23. Vibrating screen; 24. Second conveyor belt; 25. First crusher; 26. Second crusher; 60. Iron concentrate slurry processing device; 61. Iron concentrate storage bin; 81. First mixing barrel; 82. Carbon flotation machine; 83. Second mixing barrel; 84. Silver flotation machine; 85. Tailings bin; 86. Tailings magnetic separator; 121. Chimney; 122. Fan; 123. Heat exchanger; 124. Heat pump; 221. Belt iron remover; 601. Iron concentrate filter; 602. Recovery magnetic separator; 821. First thickener; 822. Carbon concentrate filter; 841. Second thickener; 842. Silver concentrate filter; 861. Tailings thickener; 862. Tailings filter. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0038] like Figure 1 As shown, the present application provides a zinc kiln slag treatment device, comprising a zinc smelting device 1, a crushing device 2, a powder bin 3, a ball mill 4, a slurry mixing tank 5, a magnetic separator 6, a cyclone 7 and a beneficiation device 8 connected in series in sequence;

[0039] The cyclone 7 is also connected to the feeding end of the ball mill 4;

[0040] The ore dressing device 8 is connected to the carbon concentrate storage bin 9 and the silver concentrate storage bin 10 respectively;

[0041] The magnetic separator 6 is also connected to the iron ore concentrate slurry processing device 60 and the iron ore concentrate storage bin 61 in sequence.

[0042] When in use, the zinc kiln slag discharged from the kiln is cooled and then transferred to the crushing device 2 for crushing and screening, and then transferred to the powder bin 3 for temporary storage.

[0043] The crushed slag temporarily stored in the powder bin 3 is transferred to the ball mill 4 for ball milling to a certain fineness, such as ~0.074mm. The ball milling can be carried out by dry grinding or wet grinding. In this application, wet grinding is used. The qualified slag slurry ground by the ball mill 4 is screened and transferred to the slurry mixing tank 5 to add water to be mixed into a slurry of a certain concentration. The mixed slurry is then transferred to the magnetic separator 6 for magnetic separation. The iron concentrate obtained by magnetic separation enters the iron concentrate slurry processing device 60 for dehydration. The dehydrated iron concentrate is transferred to the iron concentrate storage bin 61 for recovery.

[0044] The slurry after magnetic separation enters the hydrocyclone 7 for hydrocyclone classification by hydraulic power. The ore particles with larger specific gravity obtained from the bottom of the hydrocyclone 7 are returned to the ball mill 4 for crushing again. The slurry discharged from the top of the hydrocyclone 7 enters the mineral processing device 8 for flotation to obtain carbon concentrate and silver concentrate, which are temporarily stored in the carbon concentrate storage bin 9 and the silver concentrate storage bin 10 respectively. The tailings obtained after flotation by the mineral processing device 8 can be sold as building materials. In this way, the graded recovery of zinc kiln slag is realized, and the zinc kiln slag is utilized as a resource.

[0045] The present application provides a zinc kiln slag method, which crushes the zinc kiln slag discharged from a zinc smelting device 1 by setting a crushing device 2, and sets a ball mill 4 to grind the crushed kiln slag into fine slurry, and then the slurry is mixed in a slurry mixing pool 5 and then enters a magnetic separator 6 to separate the iron concentrate in the slurry, and then the slurry after magnetic separation is passed into a cyclone 7 to classify the slurry according to specific gravity, and the light slurry on the upper part of the cyclone 7 passes through a beneficiation device 8 to separate the carbon concentrate and the silver concentrate in the slurry. The device of the present application, through the coordinated use of the above-mentioned equipment, can separate and recover the iron concentrate, carbon concentrate and silver concentrate in the zinc kiln slag, and recover the mineral resources in the kiln slag, thereby overcoming the disadvantage of the waste of mineral resources caused by the inability to fully recover the mineral resources in the zinc kiln slag in the traditional treatment method.

[0046] The device of the present application also has the following beneficial effects:

[0047] It can improve the utilization and recovery rate of kiln slag iron, carbon, silver and other products; reduce carbon consumption, save energy and reduce emissions, and reduce carbon emissions; it can improve the product structure of the enterprise and increase profit margins; it can promote the comprehensive utilization of zinc smelting slag, heavy metal solid and hazardous waste to a larger scale and at a higher level; it is of great significance to promote the prevention and control of heavy metal pollution, the development of circular economy technology, and energy conservation and emission reduction.

[0048] like Figure 2 As shown, optionally, the crushing device 2 includes a bin screen 21, a first conveyor belt 22, a vibrating screen 23 and a second conveyor belt 24 which are sequentially connected in series;

[0049] The bin screen 21 is connected to the first crusher 25, and the first conveyor belt 22 is arranged below the first crusher 25 to receive the crushed material from the first crusher 25;

[0050] The vibrating screen 23 is connected to the second crusher 26, and the second conveyor belt 24 is arranged below the second crusher 26 to receive the crushed material from the second crusher 26;

[0051] The bin screen 21 is connected to the zinc smelting device 1, and the second conveyor belt 24 is connected to the powder bin 3;

[0052] The crushing particle size of the second crusher 26 is smaller than the crushing particle size of the first crusher 25 .

[0053] In the present application, when in use, the zinc kiln slag is transferred to the bin grid screen 21 for screening, and the slag on the screen that fails to pass through the screen holes is transferred to the first crusher 25 (such as a jaw crusher, a double-roll crusher, etc.) for crushing. The crushed slag and the slag that passes through the screen holes of the bin grid screen 21 fall onto the first conveyor belt 22, and are then transferred to the vibrating screen 23 for further screening.

[0054] In the vibrating screen 23, the slag on the screen that fails to pass through the screen holes is transferred to the second crusher 26 (such as a jaw crusher, a double-roll crusher, etc.) for crushing. The crushed slag and the slag that passes through the screen holes of the vibrating screen 23 fall onto the second conveyor belt 24 and are transferred to the powder bin 3 for temporary storage.

[0055] like Figure 3 As shown, optionally, the mineral processing device 8 includes a first stirring barrel 81, a carbon flotation machine 82, a second stirring barrel 83 and a silver flotation machine 84 connected in series in sequence;

[0056] The carbon flotation machine 82 is also connected to the first thickener 821, the carbon concentrate filter 822 and the carbon concentrate storage bin 9 in sequence;

[0057] The silver flotation machine 84 is also connected to the second thickener 841 , the silver concentrate filter 842 and the silver concentrate storage bin 10 in sequence.

[0058] In the present application, when in use, the slurry discharged from the top of the cyclone 7 first enters the first mixing barrel 81 to add water, collector and frother to stir and prepare the slurry, and the prepared slurry enters the carbon flotation machine 82 for flotation. There are multiple carbon flotation machines 82. When flotating the carbon concentrate, a process of one roughing selection, one fine selection, and one scavenging selection and returning the slurry in sequence can be adopted. The carbon concentrate slurry obtained by flotation enters the first thickener 821 for thickening and precipitation. After the thickened and precipitated carbon concentrate slurry is filtered by the carbon concentrate filter 822, the obtained carbon concentrate is transferred to the carbon concentrate storage bin 9 for recovery.

[0059] After the carbon concentrate is floated in the carbon flotation machine 82, the obtained carbon flotation tailings are transferred to the second mixing barrel 83, water, collector and frother are added to stir and prepare the slurry, and the prepared slurry enters the silver flotation machine 84 for flotation. There are multiple silver flotation machines 84. When the silver concentrate is floated, a process of one roughing selection, two fine selections, and two scavenging selections of the ore can be adopted. The silver concentrate slurry obtained by flotation enters the second thickener 841 and is combined with the filtrate after magnetic separation for thickening and precipitation. The thickened and precipitated silver concentrate slurry is filtered through the silver concentrate filter 842, and the obtained silver concentrate is transferred to the silver concentrate storage bin 10 for recovery.

[0060] like Figure 4 As shown, optionally, the iron concentrate slurry processing device 60 includes an iron concentrate filter 601 and a recovery magnetic separator 602 connected to each other;

[0061] The iron ore concentrate filter 601 is connected to the iron ore concentrate storage bin 61;

[0062] The recovery magnetic separator 602 is also connected to the second thickener 841 .

[0063] In the present application, when in use, the ball mill 4 grinds the qualified slag slurry, screens it, transfers it to the slurry mixing tank 5, adds water to mix it into a certain concentration of slurry, and then transfers the prepared slurry to the magnetic separator 6 for magnetic separation, and the iron concentrate obtained by magnetic separation enters the iron concentrate filter 601 for filtration to obtain the filter cake, which is transferred to the iron concentrate storage bin 61 for recovery; and the filtrate enters the recovery magnetic separator 602 for magnetic separation again, and the magnetic material obtained by magnetic separation is transferred to the iron concentrate filter 601 for filtration and the above process is repeated. The filtrate after magnetic separation is transferred to the second thickener 841 for processing to fully recover the silver ore in the filtrate and reduce the waste of mineral resources.

[0064] like Figure 5 As shown, optionally, the silver flotation machine 84 is also connected to the tailings magnetic separator 86;

[0065] The tailings magnetic separator 86 is connected to the tailings thickener 861, the tailings filter 862 and the tailings bin 85 in sequence;

[0066] The tailings magnetic separator 86 is also connected to the iron ore concentrate filter 601 .

[0067] The tailings slurry obtained after the silver concentrate is floated by the silver flotation machine 84 is subjected to magnetic separation by the tailings magnetic separator 86, and then the magnetic slurry is combined with the iron concentrate slurry obtained by the magnetic separation of the magnetic separator 6, and then transferred to the iron concentrate filter 601 for filtration. The tailings slurry after magnetic separation by the tailings magnetic separator 86 enters the tailings thickener 861 for thickening and sedimentation, and then the thickened and precipitated tailings slurry is transferred to the tailings filter 862 for filtration, and the filter cake is transferred to the tailings bin 85 for recovery, and after drying and other treatments, it is sold as a building material raw material.

[0068] like Figure 6 As shown, optionally, a belt-type iron remover 221 is installed above the first conveyor belt 22 near the output end.

[0069] In the present application, a belt iron remover 221 is installed above the first conveyor belt 22 near the output end, which can remove part of the iron in the slag in advance, thereby reducing the processing pressure of the subsequent process sections.

[0070] like Figure 7 As shown, optionally, the zinc smelting device 1 includes a rotary kiln 11 and a grate cooler 12;

[0071] The exhaust end at the top of the grate cooler 12 is connected to a chimney 121 , the lower end of the chimney 121 is connected to a heat exchanger 123 via a fan 122 , and the heat exchanger 123 is connected to a heat pump 124 and the upper end of the chimney 121 in turn.

[0072] In the present application, when in use, the hot zinc smelting slag discharged from the rotary kiln 11 falls into the grate cooler 12 for cooling. The high-temperature flue gas generated during the cooling process is discharged into the chimney 121 from the flue gas discharge end at the top of the grate cooler 12. The flue gas entering the chimney 121 is sucked by the fan 122 and transferred to the heat exchanger 123 for heat exchange and cooling, and the temperature of the flue gas is reduced to below 100°C. The flue gas after heat exchange and cooling in the heat exchanger 123 enters the heat pump 124 (the heat pump is, for example, an air source heat pump) to recycle the low-grade heat of the flue gas and convert it into higher-grade heat for use in the factory's heating, drying and other sections. The cooling water after heat exchange with the flue gas in the heat exchanger 123 is heated by rising temperature, and the heated water can be used for heating in the factory.

[0073] A zinc kiln slag treatment device, the working process of which is as follows:

[0074] When in use, the hot zinc smelting slag discharged from the rotary kiln 11 falls into the grate cooler 12 for cooling. The high-temperature flue gas generated during the cooling process is discharged into the chimney 121 from the flue gas discharge end at the top of the grate cooler 12. The flue gas entering the chimney 121 is sucked by the fan 122 and transferred to the heat exchanger 123 for heat exchange and cooling, and the temperature of the flue gas is reduced to below 100°C. The flue gas after heat exchange and cooling in the heat exchanger 123 enters the heat pump 124 (the heat pump is, for example, an air source heat pump) to recycle the low-grade heat of the flue gas and convert it into higher-grade heat for use in the factory's heating, drying and other work sections. The cooling water after heat exchange with the flue gas in the heat exchanger 123 is heated by rising temperature, and the heated water can be used for heating in the factory.

[0075] The zinc kiln slag cooled by the grate cooler 12 is transferred to the bin screen 21 for screening, and the slag on the screen that fails to pass through the screen holes is transferred to the first crusher 25 (such as a jaw crusher, a double-roll crusher, etc.) for crushing. The crushed slag and the slag that passes through the screen holes of the bin screen 21 fall onto the first conveyor belt 22, and after iron removal by the belt iron remover 221, it is transferred to the vibrating screen 23 for further screening.

[0076] In the vibrating screen 23, the slag on the screen that fails to pass through the screen holes is transferred to the second crusher 26 (such as a jaw crusher, a double-roll crusher, etc.) for crushing. The crushed slag and the slag that passes through the screen holes of the vibrating screen 23 fall onto the second conveyor belt 24 and are transferred to the powder bin 3 for temporary storage.

[0077] The crushed slag temporarily stored in the powder bin 3 is transferred to the ball mill 4 for ball milling to a certain fineness, such as ~0.074mm. The ball milling can be carried out by dry grinding or wet grinding. In this application, wet grinding is used. The qualified slag slurry ground by the ball mill 4 is screened and transferred to the slurry mixing pool 5 to add water to be mixed into a certain concentration of slurry. The prepared slurry is then transferred to the magnetic separator 6 for magnetic separation. The iron ore obtained by magnetic separation enters the iron ore filter 601 to filter to obtain the filter cake and is transferred to the iron ore storage bin 61 for recovery; and the filtrate enters the recovery magnetic separator 602 for magnetic separation again. The magnetic material obtained by magnetic separation is transferred to the iron ore filter 601 for filtration and the above process is repeated. The filtrate after magnetic separation is transferred to the second thickener 841 for processing.

[0078] The ore pulp after magnetic separation enters the cyclone 7 and is subjected to cyclone classification by hydraulic power. The ore particles with larger specific gravity obtained from the bottom of the cyclone 7 are returned to the ball mill 4 for crushing again; the ore pulp discharged from the top of the cyclone 7 first enters the first mixing barrel 81, where water, collector and frother are added to stir and mix the ore pulp. The prepared ore pulp enters the carbon flotation machine 82 for flotation. There are multiple carbon flotation machines 82. When flotating the carbon concentrate, a process of one roughing selection, one fine selection and one scavenging selection can be adopted, and the carbon concentrate slurry obtained by flotation enters the first thickener 821 for thickening and precipitation. After the thickened and precipitated carbon concentrate slurry is filtered by the carbon concentrate filter 822, the obtained carbon concentrate is transferred to the carbon concentrate storage bin 9 for recovery.

[0079] After the carbon concentrate is floated in the carbon flotation machine 82, the obtained carbon flotation tailings are transferred to the second mixing barrel 83, water, collector and frother are added to stir and prepare the slurry, and the prepared slurry enters the silver flotation machine 84 for flotation. There are multiple silver flotation machines 84. When the silver concentrate is floated, a process of one roughing selection, two fine selections, and two scavenging selections of the ore can be adopted. The silver concentrate slurry obtained by flotation enters the second thickener 841 and is combined with the filtrate after magnetic separation for thickening and precipitation. The thickened and precipitated silver concentrate slurry is filtered through the silver concentrate filter 842, and the obtained silver concentrate is transferred to the silver concentrate storage bin 10 for recovery.

[0080] The tailings slurry obtained after the silver concentrate is floated by the silver flotation machine 84 is subjected to magnetic separation by the tailings magnetic separator 86, and then the magnetic slurry is combined with the iron concentrate slurry obtained by the magnetic separation of the magnetic separator 6, and then transferred to the iron concentrate filter 601 for filtration. The tailings slurry after magnetic separation by the tailings magnetic separator 86 enters the tailings thickener 861 for thickening and sedimentation, and then the thickened and precipitated tailings slurry is transferred to the tailings filter 862 for filtration, and the filter cake is transferred to the tailings bin 85 for recovery, and after drying and other treatments, it is sold as a building material raw material.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features therein may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A zinc kiln slag treatment device, characterized in that: It comprises a zinc smelting device (1), a crushing device (2), a powder bin (3), a ball mill (4), a slurry mixing tank (5), a magnetic separator (6), a cyclone (7) and a mineral separation device (8) which are sequentially connected in series; The cyclone (7) is also connected to the feeding end of the ball mill (4); The ore dressing device (8) is connected to the carbon concentrate storage bin (9) and the silver concentrate storage bin (10) respectively; The magnetic separator (6) is also connected in sequence to the iron ore concentrate slurry processing device (60) and the iron ore concentrate storage bin (61).

2. The zinc kiln slag treatment device according to claim 1, characterized in that: The crushing device (2) comprises a bin screen (21), a first conveyor belt (22), a vibrating screen (23) and a second conveyor belt (24) which are sequentially connected in series; The bin screen (21) is connected to the first crusher (25), and the first conveyor belt (22) is arranged below the first crusher (25) and is used to receive the crushed material from the first crusher (25); The vibrating screen (23) is connected to the second crusher (26), and the second conveyor belt (24) is arranged below the second crusher (26) to receive the crushed material from the second crusher (26); The bin grid screen (21) is connected to the zinc smelting device (1), and the second conveyor belt (24) is connected to the powder bin (3); The crushing particle size of the second crusher (26) is smaller than the crushing particle size of the first crusher (25).

3. The zinc kiln slag treatment device according to claim 1, characterized in that: The ore dressing device (8) comprises a first stirring barrel (81), a carbon flotation machine (82), a second stirring barrel (83) and a silver flotation machine (84) which are sequentially connected in series; The carbon flotation machine (82) is also connected in sequence to the first thickener (821), the carbon concentrate filter (822) and the carbon concentrate storage bin (9); The silver flotation machine (84) is also connected in sequence to the second thickener (841), the silver concentrate filter (842) and the silver concentrate storage bin (10).

4. The zinc kiln slag treatment device according to claim 3, characterized in that: The iron ore concentrate slurry processing device (60) comprises an iron ore concentrate filter (601) and a recovery magnetic separator (602) which are connected to each other; The iron ore concentrate filter (601) is connected to the iron ore concentrate storage bin (61); The recovery magnetic separator (602) is also connected to the second thickener (841).

5. The zinc kiln slag treatment device according to claim 4, characterized in that: The silver flotation machine (84) is also connected to a tailings magnetic separator (86); The tailings magnetic separator (86) is connected to the tailings thickener (861), the tailings filter (862) and the tailings bin (85) in sequence; The tailings magnetic separator (86) is also connected to the iron ore concentrate filter (601).

6. The zinc kiln slag treatment device according to claim 2, characterized in that: A belt-type iron remover (221) is also installed above the first conveyor belt (22) near the output end.

7. The zinc kiln slag treatment device according to any one of claims 1 to 6, characterized in that: The zinc smelting device (1) comprises a rotary kiln (11) and a grate cooler (12); The exhaust end at the top of the grate cooler (12) is connected to a chimney (121), the lower end of the chimney (121) is connected to a heat exchanger (123) via a fan (122), and the heat exchanger (123) is connected to a heat pump (124) and the upper end of the chimney (121) in sequence.

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