Blast furnace cloth bag ash dezincification system and recovery equipment thereof

Abstract

The utility model relates to the technical field of steel production, and discloses a blast furnace cloth bag ash dezincification system and recovery equipment thereof, and the recovery equipment comprises an acid liquor recovery device, an ash residue neutralizing tank, an ash residue dehydrator and a reuse water tank, the acid liquor recovery device is used for being communicated with an impurity removal and purification tank in the blast furnace cloth bag ash dezincification system, and the acid liquor recovery device is used for conducting solid-liquid separation on mixed materials collected on the lower portion of the impurity removal and purification tank and storing acid liquor. The ash neutralizing tank is communicated with the acid liquor recovery device and is used for neutralizing solid-containing mortar in the acid liquor recovery device; the ash dehydrator is communicated with the ash neutralizing tank, and the ash dehydrator is used for dehydrating the neutralized ash to obtain dehydrated ash; and the recycling water tank is communicated with the ash dehydrator and is used for storing water dehydrated from the ash dehydrator. The recycling equipment can be used for recycling ash residues in the blast furnace cloth bag ash, so that reutilization of resources is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of steel production, in particular to a blast furnace bag ash dezincification system and recovery equipment thereof. Background Art

[0002] In recent years, my country has vigorously strengthened environmental protection, resource conservation, clean production, and circular economy. The long-term extensive production model of steel enterprises has been subject to increasingly stringent constraints, and large steel enterprises are actively exploring various dust recycling and utilization models.

[0003] The dust generated by the production system of steel enterprises, especially the sintering field ash and blast furnace bag ash, contains a certain amount of substances that are beneficial to resource conservation (coke, iron, calcium oxide, etc.) and should be recycled as much as possible.

[0004] How to realize the recovery of ash from blast furnace bag ash to meet the reuse of resources has become a technical problem to be solved urgently in this field. Utility Model Content

[0005] The utility model aims to provide a blast furnace bag ash dezincification system and recovery equipment thereof. The blast furnace bag ash dezincification system recovery equipment can recover ash slag in the blast furnace bag ash, thereby realizing the recycling of resources.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A recovery device for a blast furnace bag ash dezincification system comprises: an acid recovery device, an ash neutralization tank, an ash dehydrator and a reuse water tank; the acid recovery device is used to be connected with an impurity removal purification tank in the blast furnace bag ash dezincification system, and the acid recovery device is used to separate the mixed material collected at the bottom of the impurity removal purification tank from solid and liquid and store the acid; the ash neutralization tank is connected with the acid recovery device, and the ash neutralization tank is used to neutralize the solid-containing ash slurry in the acid recovery device; the ash dehydrator is connected with the ash neutralization tank, and the ash dehydrator is used to dehydrate the neutralized ash to obtain dehydrated ash; the reuse water tank is connected with the ash dehydrator, and the reuse water tank is used to store the water removed from the ash dehydrator.

[0008] This blast furnace bag ash dezincification system recovery equipment, when working, the mixed material at the bottom of the impurity removal purification tank first passes through the acid liquid recovery device to achieve solid-liquid separation, and the acid liquid recovery device can store the acid liquid; then the separated solid-containing slurry enters the ash neutralization tank for neutralization; the neutralized solid-containing slurry then enters the ash dewatering machine for dehydration to obtain dehydrated ash, and the dehydrated water flows out to the reuse water tank for storage.

[0009] Therefore, the blast furnace bag ash dezincification system recovery equipment can recover the ash slag in the blast furnace bag ash, thereby realizing the recycling of resources.

[0010] Optionally, the acid recovery device includes an acid recovery pump, an acid recovery tank and an acidic water storage tank; the acid recovery pump is used to transport the mixed material at the bottom of the impurity removal purification tank to the acid recovery tank; the acid recovery tank is used to separate the solid and liquid of the mixed material; and the acidic water storage tank is used to store the acid.

[0011] Optionally, the blast furnace bag ash dezincification system recovery equipment also includes an alkali adding device; the ash neutralization tank is connected to the acid solution recovery tank; the alkali adding device is used to provide alkali solution into the ash neutralization tank to adjust the acidic solid-containing slurry to neutral.

[0012] Optionally, the acidic water storage tank is also used to provide acid solution to the acid leaching dezincification tank in the blast furnace bag ash dezincification system.

[0013] Optionally, the recycled water tank is also used to supply water to the acid leaching dezincification tank in the blast furnace bag ash dezincification system.

[0014] Optionally, the furnace cloth bag ash dezincification system recovery equipment also includes a conveying device; the conveying device is used to transport the ash in the ash dehydrator to the ironmaking raw material batching plant.

[0015] A blast furnace bag ash dezincification system comprises blast furnace bag ash dezincification equipment and any one of the above-mentioned recovery equipment.

[0016] Optionally, the blast furnace bag ash dezincification equipment includes: an acid leaching dezincification tank, an impurity removal and purification tank, a zinc liquid separator, a filtering device, a concentrating device, and a zinc liquid electrolytic deposition tank; the acid leaching dezincification tank is used to acidically soak the ash to convert the zinc oxide in the ash into zinc sulfate, and convert the zinc from the solid phase to the liquid phase; the impurity removal and purification tank is connected to the acid leaching dezincification tank, and the impurity removal and purification tank is used to precipitate the iron ions and other heavy metal ions dissolved in the acid leaching dezincification section, and transport the zinc-containing supernatant to the zinc liquid separator; the filtering device is connected to the zinc liquid separator, and the filtering device is used to remove suspended matter in the zinc liquid; the concentrating device is connected to the filtering device, and the concentrating device is used to concentrate the zinc liquid; the zinc liquid electrolytic deposition tank is connected to the concentrating device, and the zinc liquid electrolytic deposition tank is used to electrolyze high-purity metallic zinc; the impurity removal and purification tank is connected to the acid liquid recovery device, and the acid leaching dezincification tank is connected to both the acid liquid recovery device and the recycled water tank.

[0017] Optionally, the filtering device includes a zinc liquid purification tank and a zinc liquid ultrafilter; the zinc liquid separator is connected to one end of the zinc liquid purification tank, and the zinc liquid purification tank is used to remove large suspended particles in the zinc liquid; the zinc liquid ultrafilter is connected to the other end of the zinc liquid purification tank, and the zinc liquid ultrafilter is used to remove fine suspended matter in the zinc liquid.

[0018] Optionally, the concentrating device includes a concentrating pressure pump and a concentrating module; the concentrating pressure pump is used to transport the zinc liquid filtered by the filtering device to the concentrating module; the concentrating module is used to separate water and salt in the zinc liquid under the pressure of the concentrating pressure pump to obtain zinc-rich liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Among them:

[0020] Figure 1 A schematic diagram of a structure in which a blast furnace bag ash dezincification system recovery device provided in an embodiment of the utility model is connected to a blast furnace bag ash dezincification system;

[0021] Figure 2 A schematic structural diagram of a blast furnace bag ash dezincification system provided in an embodiment of the utility model.

[0022] Icons: 1-acid recovery device; 2-ash neutralization tank; 3-ash dehydrator; 4-recycled water tank; 5-acid recovery pump; 6-acid recovery tank; 7-acidic water storage tank; 8-alkali adding device; 9-conveying device; 10-water pump; 11-acid leaching zinc removal tank; 12-impurity removal purification tank; 13-zinc liquid separator; 14-filtration device; 15-concentration device; 16-zinc liquid electrolytic deposition tank; 17-zinc liquid purification tank; 18-zinc liquid ultrafilter; 19-concentration pressure pump; 20-concentration module. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention includes such modifications and variations within the scope of the appended claims and their equivalents.

[0024] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, they can be fixedly connected or detachably connected; they can be directly connected or indirectly connected through an intermediate component. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Figure 1 The schematic diagram of the structure of the blast furnace bag ash dezincification system recovery device provided by the utility model embodiment is connected to the blast furnace bag ash dezincification system, as shown in FIG. Figure 1 As shown, an embodiment of the utility model provides a recovery device for a blast furnace bag ash dezincification system, comprising: an acid recovery device 1, an ash neutralization tank 2, an ash dehydrator 3 and a reuse water tank 4; the acid recovery device 1 is used to be connected to the impurity removal purification tank 12 in the blast furnace bag ash dezincification system, and the acid recovery device 1 is used to separate the mixed material collected at the bottom of the impurity removal purification tank 12 into solid and liquid, and store the acid; the ash neutralization tank 2 is connected to the acid recovery device 1, and the ash neutralization tank 2 is used to neutralize the solid-containing ash slurry in the acid recovery device 1; the ash dehydrator 3 is connected to the ash neutralization tank 2, and the ash dehydrator 3 is used to dehydrate the neutralized ash to obtain dehydrated ash; the reuse water tank 4 is connected to the ash dehydrator 3, and the reuse water tank 4 is used to store the water removed from the ash dehydrator 3.

[0026] In this embodiment, when the blast furnace bag ash dezincification system recovery equipment is working, the mixed material at the bottom of the impurity removal purification tank 12 first passes through the acid recovery device 1 to achieve solid-liquid separation, and the acid recovery device 1 can store acid; then the separated solid slurry enters the ash neutralization tank 2 for neutralization; the neutralized solid slurry then enters the ash dehydrator 3 for dehydration to obtain dehydrated ash, and the dehydrated water can be transported to the reuse water tank 4 for storage by the water pump 10. Figure 1 shown.

[0027] Therefore, the blast furnace bag ash dezincification system recovery equipment can recover the ash slag in the blast furnace bag ash, thereby realizing the recycling of resources.

[0028] refer to Figure 1As an optional embodiment, the acid liquid recovery device 1 includes an acid recovery pump 5, an acid liquid recovery tank 6 and an acidic water storage tank 7; the acid recovery pump 5 is used to transport the mixed material at the bottom of the impurity removal purification tank 12 to the acid liquid recovery tank 6; the acid liquid recovery tank 6 is used to separate the solid and liquid of the mixed material; the acidic water storage tank 7 is used to store the acid liquid.

[0029] In this embodiment, specifically, the mixed material at the bottom of the impurity removal purification tank 12 enters the acid recovery tank through the acid recovery pump 5 to separate the mixed material into solid and liquid, and the separated acid liquid can be transported to the acidic water storage tank 7 by the water pump 10. Figure 1 shown.

[0030] This setting can not only separate the solid-containing slurry, but also preserve the acid, further achieving the effect of resource recovery.

[0031] Continue to refer Figure 1 As an optional embodiment, the blast furnace bag ash dezincification system recovery equipment also includes an alkali adding device 8; the ash neutralization tank 2 is connected to the acid solution recovery tank 6; the alkali adding device is used to provide alkali solution into the ash neutralization tank 2 to adjust the acidic solid slurry to neutral.

[0032] In this embodiment, the alkali adding device 8 can transport the alkali solution to the ash neutralization tank 2 through the water pump 10, so as to adjust the acidity and alkalinity of the solid-containing slurry. Adjusting the solid-containing slurry to neutral can prevent adverse effects on subsequent ash recovery.

[0033] As an optional embodiment, the acidic water storage tank 7 is also used to provide acid solution to the acid leaching dezincification tank 11 in the blast furnace bag ash dezincification system.

[0034] In this embodiment, the acidic water storage tank 7 can be connected to the acid leaching and zinc removal tank 11 through a water pump 10 to transport the acid solution into the acid leaching and zinc removal tank 11. Figure 1 shown.

[0035] As an optional embodiment, the recycled water tank 4 is also used to supply water to the acid leaching dezincification tank 11 in the blast furnace bag ash dezincification system.

[0036] In this embodiment, similarly, the recycled water tank 4 can also be connected to the acid leaching zinc removal tank 11 through a water pump 10 to supply water to the acid leaching zinc removal tank 11. Figure 1 shown.

[0037] refer to Figure 1 As an optional embodiment, the furnace cloth bag ash dezincification system recovery equipment also includes a conveying device 9; the conveying device 9 is used to transport the ash in the ash dehydrator 3 to the ironmaking raw material batching plant.

[0038] In this embodiment, the transport device 9 may include a conveyor, a transport vehicle, etc., so as to transport the dehydrated ash to the ironmaking raw material batching plant, thereby realizing the recycling of the ash.

[0039] Figure 2 The schematic diagram of the structure of the blast furnace bag ash dezincification system provided by the embodiment of the utility model is as follows: Figure 2 As shown, an embodiment of the utility model further provides a blast furnace bag ash dezincification system, comprising a blast furnace bag ash dezincification device and any one of the above-mentioned recovery devices.

[0040] References Figure 2 Specifically, as an optional embodiment, the blast furnace bag ash dezincification equipment includes: an acid leaching dezincification tank 11, an impurity removal and purification tank 12, a zinc liquid separator 13, a filtering device 14, a concentrating device 15, and a zinc liquid electrolytic tank 16; the acid leaching dezincification tank 11 is used to acid-immerse the ash to convert the zinc oxide in the ash into zinc sulfate, and convert the zinc from the solid phase to the liquid phase; the impurity removal and purification tank 12 is connected to the acid leaching dezincification tank 11, and the impurity removal and purification tank 12 is used to remove the iron ions and other heavy metals dissolved in the acid leaching dezincification section. The ions are precipitated and the supernatant containing zinc is transported to the zinc liquid separator 13; the filtering device 14 is connected to the zinc liquid separator 13, and the filtering device 14 is used to remove suspended matter in the zinc liquid; the concentrating device 15 is connected to the filtering device 14, and the concentrating device 15 is used to concentrate the zinc liquid; the zinc liquid electrolytic deposition tank 16 is connected to the concentrating device 15, and the zinc liquid electrolytic deposition tank 16 is used to electrolytically deposit high-purity metallic zinc; the impurity removal purification tank 12 is connected to the acid liquid recovery device 1, and the acid leaching dezincification tank 11 is connected to the acid liquid recovery device 1 and the recycled water tank 4.

[0041] In this embodiment, when the blast furnace bag ash dezincification system is working, the blast furnace bag ash after impurity removal and dehydration is first transported to the acid leaching dezincification tank 11 to achieve the transformation of zinc from solid phase to liquid phase; then the zinc liquid is transported to the impurity removal purification tank 12 to precipitate iron ions and other heavy metal ions.

[0042] Then, the zinc-containing supernatant is transported to the filtering device 14 through the zinc liquid separator 13 to remove the suspended matter in the zinc liquid; then the filtered zinc liquid is transported to the concentrating device 15 to concentrate the zinc liquid; finally, the concentrated zinc liquid is transported to the zinc liquid electrolytic tank 16 for electrolytic deposition of high-purity metallic zinc. At the same time, the mixed material remaining in the lower part of the impurity removal purification tank 12 is firstly passed through the acid liquid recovery device 1 to achieve solid-liquid separation, and the acid liquid recovery device 1 can store the acid liquid; then the separated solid-containing slurry enters the ash neutralization tank 2 for neutralization; the neutralized solid-containing slurry then enters the ash dehydrator 3 for dehydration to obtain dehydrated ash, and the dehydrated water flows out to the recycling water tank 4 for storage.

[0043] Continue to refer Figure 2As an optional embodiment, the filtering device 14 includes a zinc liquid purification tank 17 and a zinc liquid ultrafilter 18; the zinc liquid separator 13 is connected to one end of the zinc liquid purification tank 17, and the zinc liquid purification tank 17 is used to remove large suspended particles in the zinc liquid; the zinc liquid ultrafilter 18 is connected to the other end of the zinc liquid purification tank 17, and the zinc liquid ultrafilter 18 is used to remove fine suspended matter in the zinc liquid.

[0044] In this embodiment, the provision of the zinc liquid purification tank 17 and the zinc liquid ultrafilter 18 can gradually filter out the suspended matter doped in the zinc liquid, thereby improving the purity of zinc and further achieving the removal of impurities.

[0045] like Figure 2 As shown, as an optional embodiment, the concentration device 15 includes a concentration pressure pump 19 and a concentration module 20; the concentration pressure pump 19 is used to transport the zinc liquid filtered by the filtering device 14 to the concentration module 20; the concentration module 20 is used to separate the water and salt in the zinc liquid under the pressure of the concentration pressure pump 19 to obtain zinc-rich liquid.

[0046] It should be noted that a water pump 10 can be installed between the acid leaching zinc removal tank 11 and the impurity removal purification tank 12, between the zinc liquid separator 13 and the zinc liquid purification tank 17, and between the zinc liquid purification tank 17 and the zinc liquid ultrafilter 18, so as to realize the transportation of zinc liquid between different work sections.

[0047] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blast furnace bag ash dezincification system recovery equipment, characterized in that: include: Acid recovery device, ash neutralization tank, ash dehydrator and recycling water tank; The acid liquid recovery device is used to be connected to the impurity removal purification tank in the blast furnace bag ash dezincification system, and the acid liquid recovery device is used to separate the solid and liquid of the mixed material collected at the bottom of the impurity removal purification tank and store the acid liquid; The ash neutralization tank is in communication with the acid recovery device, and the ash neutralization tank is used to neutralize the solid slurry in the acid recovery device; The ash dehydrator is connected to the ash neutralization tank, and is used to dehydrate the neutralized ash to obtain dehydrated ash; The recycled water tank is communicated with the ash dehydrator, and is used to store the water removed from the ash dehydrator.

2. The blast furnace bag ash dezincification system recovery equipment according to claim 1 is characterized in that: The acid liquid recovery device comprises an acid recovery pump, an acid liquid recovery tank and an acidic water storage tank; The acid recovery pump is used to transport the mixed material at the bottom of the impurity removal purification tank to the acid solution recovery tank; The acid solution recovery tank is used to separate the mixed material into solid and liquid; The acidic water storage tank is used to store acid solution.

3. The blast furnace bag ash dezincification system recovery equipment according to claim 2 is characterized in that: The blast furnace bag ash dezincification system recovery equipment also includes an alkali adding device; The ash neutralization tank is connected to the acid solution recovery tank; The alkali adding device is used to provide alkali solution into the ash neutralization tank to adjust the acidic solid-containing slurry to neutral.

4. The blast furnace bag ash dezincification system recovery equipment according to claim 2, characterized in that: The acidic water storage tank is also used to provide acid solution to the acid leaching dezincification tank in the blast furnace bag ash dezincification system.

5. The blast furnace bag ash dezincification system recovery equipment according to claim 1, characterized in that: The recycled water tank is also used to supply water to the acid leaching dezincification tank in the blast furnace bag ash dezincification system.

6. The blast furnace bag ash dezincification system recovery equipment according to claim 1, characterized in that: The furnace cloth bag ash dezincification system recovery equipment also includes a conveying device; The conveying device is used to transport the ash in the ash dehydrator to the ironmaking raw material batching plant.

7. A blast furnace bag ash dezincification system, characterized in that: The invention comprises a blast furnace bag ash dezincification device and a recovery device as claimed in any one of claims 1 to 6.

8. The blast furnace bag ash dezincification system according to claim 7, characterized in that: The blast furnace bag ash dezincification equipment comprises: an acid leaching dezincification tank, an impurity removal purification tank, a zinc liquid separator, a filtering device, a concentrating device, and a zinc liquid electrolytic deposition tank; The acid leaching dezincification tank is used to perform acid leaching on the ash to convert the zinc oxide in the ash into zinc sulfate, thereby converting zinc from the solid phase into the liquid phase; The impurity removal and purification tank is connected to the acid leaching and zinc removal tank, and the impurity removal and purification tank is used to precipitate the iron ions and other heavy metal ions dissolved in the acid leaching and zinc removal section, and transport the zinc-containing supernatant to the zinc liquid separator; The filtering device is in communication with the zinc liquid separator, and the filtering device is used to remove suspended matter in the zinc liquid; The concentrating device is in communication with the filtering device, and the concentrating device is used to concentrate the zinc solution; The zinc liquid electrowinning tank is in communication with the concentrating device, and the zinc liquid electrowinning tank is used for electrowinning high-purity metallic zinc; The impurity removal and purification tank is connected to the acid solution recovery device, and the acid leaching and zinc removal tank is connected to both the acid solution recovery device and the recycled water tank.

9. The blast furnace bag ash dezincification system according to claim 8, characterized in that: The filtering device comprises a zinc liquid purification tank and a zinc liquid ultrafilter; The zinc liquid separator is connected to one end of the zinc liquid purification tank, and the zinc liquid purification tank is used to remove large suspended particles in the zinc liquid; The zinc liquid ultrafilter is connected to the other end of the zinc liquid purification tank, and the zinc liquid ultrafilter is used to remove fine suspended matter in the zinc liquid.

10. The blast furnace bag ash dezincification system according to claim 9, characterized in that: The concentrating device comprises a concentrating pressure pump and a concentrating module; The concentration pressure pump is used to transport the zinc liquid filtered by the filtering device to the concentration module; The concentration module is used to separate the water and salt in the zinc liquid under the pressure of the concentration pressure pump to obtain zinc-rich liquid.

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