CN114917682B - Blast furnace dust removal ash separation system - Google Patents
Blast furnace dust removal ash separation system Download PDFInfo
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- CN114917682B CN114917682B CN202210860020.0A CN202210860020A CN114917682B CN 114917682 B CN114917682 B CN 114917682B CN 202210860020 A CN202210860020 A CN 202210860020A CN 114917682 B CN114917682 B CN 114917682B
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Abstract
The application discloses blast furnace dust removal ash piece-rate system includes: the system comprises a feeding system, a cyclone classification system, a flotation system, a gravity separation system, a dewatering and filter pressing system and a recovery system, wherein the feeding system is connected with the cyclone classification system and is used for adding blast furnace dust into the cyclone classification system; the cyclone classification system is connected with the flotation system and is used for separating zinc-rich materials and iron-rich materials from blast furnace dust and obtaining first separation tailings; the flotation system is connected with the gravity separation system and is used for separating carbon-rich materials from the first separation tailings and obtaining second separation tailings; the gravity separation system is connected with the cyclone classification system and is used for separating the carbon-rich material from the second separation tailings and obtaining a third separation tailings; the dehydration and filter pressing system is respectively connected with the cyclone classification system, the flotation system and the gravity separation system and is used for dehydrating the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material; and the recovery system is connected with the dehydration and filter pressing system and is used for recovering the filtered water.
Description
Technical Field
The application relates to the field of environmental protection, in particular to a blast furnace dust separation system.
Background
In the metallurgical industry, a large amount of dust can be produced in the production process of the blast furnace at present, and three pain points often exist in the steel plant for treating the dust: the blending is harmful because the blending requirement of a steel mill cannot be met due to the fact that the zinc and the like which are harmful to the operation of the blast furnace are contained; the external marketing is difficult because the rotary kiln is difficult to utilize due to low zinc content; the stacking is not environment-friendly, and dust, polluted soil, underground water and the like are easily caused. However, the contents of the three elements of carbon, iron and zinc are nearly half. For the blast furnace dust removal ash, the stacking is solid waste and is utilized as a resource. Therefore, how to extract and separate the three elements from the blast furnace dust becomes a hot topic. At present, a blast furnace dust separation system capable of separating carbon powder, iron powder and zinc mud from blast furnace dust is urgently needed, so that elements such as carbon, iron and zinc can be fully separated from the blast furnace dust, and can become available resources.
Aiming at the technical problem that a system capable of separating carbon powder, iron powder and zinc mud from blast furnace dust is absent at present in the prior art, so that elements such as carbon, iron and zinc in the blast furnace dust can be effectively utilized, an effective solution is not provided at present.
Disclosure of Invention
The utility model provides a blast furnace dust separation system to at least, solve the present system that lacks that exists among the prior art and can separate out carbon dust, iron powder and zinc mud from the blast furnace dust, make elements such as carbon, iron and zinc in the blast furnace dust can be by the technical problem of effective utilization.
According to an aspect of the present application, there is provided a blast furnace fly ash separation system, comprising: the system comprises a feeding system, a cyclone classification system, a flotation system, a gravity separation system, a dehydration and filter pressing system and a recovery system, wherein the feeding system is connected with the cyclone classification system and is used for adding blast furnace dust into the cyclone classification system; the cyclone classification system is connected with the flotation system and is used for separating zinc-rich materials from blast furnace dust and obtaining first separation tailings; the flotation system is connected with the gravity separation system and is used for separating carbon-rich materials from the first separation tailings and obtaining second separation tailings; the gravity separation system is connected with the cyclone classification system and is used for separating carbon-rich materials from the second separation tailings to obtain third separation tailings; the dehydration and filter pressing system is respectively connected with the cyclone classification system, the flotation system and the gravity separation system and is used for dehydrating the slurry containing the zinc-rich material, the carbon-rich material and the iron-rich material; and the recovery system is connected with the dehydration and filter pressing system and is used for recovering the filtered water.
The device is provided with a feeding system, a cyclone classification system, a flotation system, a gravity separation system, a dehydration and filter pressing system and a recovery system. The feeding system adds the blast furnace dust into the cyclone classification system, and the cyclone classification system separates the zinc-rich material and the first separation tail material from the blast furnace dust and transmits the first separation tail material to the flotation system. After the flotation system receives the first separation tailing, the carbon-rich material and the second separation tailing are separated from the first separation tailing, and the second separation tailing is transmitted to the gravity separation system. And after receiving the second separation tailings, the gravity separation system separates the carbon-rich material and the third separation tailings from the second separation tailings, and transmits the third separation tailings to the cyclone classification system. And after the cyclone classification system receives the third separation tailings, separating iron-rich materials and zinc-rich materials from the third separation tailings. And after the dehydration and filter pressing system receives the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material, dehydrating the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material, and generating zinc mud, iron powder and carbon powder. Then the dehydration filter pressing system transmits the filtered water generated after dehydration to a recovery system, and the recovery system recovers the filtered water in a centralized manner and generates circulating water. Therefore, the technical effect that carbon powder, iron powder and zinc mud can be separated from the blast furnace dust can be achieved through the product structure, and elements such as carbon, iron and zinc in the blast furnace dust can be effectively utilized. And then solved the current system that lacks a can follow the separation carbon dust, iron powder and zinc mud in the blast furnace dust removal that exists among the prior art for elements such as carbon, iron and zinc in the blast furnace dust removal can be by the technical problem of effective utilization.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, as illustrated in the accompanying drawings.
Drawings
Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily to scale. In the drawings:
FIG. 1 is a schematic illustration of a connection of a blast furnace fly ash separation system according to an embodiment of the present application;
FIG. 2 is a schematic view of the connection of the cyclone classification system in the blast furnace fly ash separation system shown in FIG. 1;
FIG. 3 is a schematic diagram of the connection of the flotation system in the blast furnace fly ash separation system shown in FIG. 1;
FIG. 4 is a schematic diagram of the connection of the gravity separation system in the blast furnace fly ash separation system shown in FIG. 1;
FIG. 5 is a schematic view of the connection of the feed system in the blast furnace fly ash separation system shown in FIG. 1; and
FIG. 6 is a schematic diagram showing the connection of a dewatering press system in the blast furnace fly ash separation system shown in FIG. 1.
Detailed Description
It should be noted that, in the present disclosure, the embodiments and features of the embodiments may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solutions of the present disclosure better understood by those skilled in the art, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present disclosure and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances for describing the embodiments of the disclosure herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
FIG. 1 is a schematic connection diagram of a blast furnace fly ash separation system according to an embodiment of the present application; referring to fig. 1, a blast furnace fly ash separation system includes: the system comprises a feeding system 10, a cyclone classification system 20, a flotation system 30, a gravity separation system 40, a dehydration and filter pressing system 50 and a recovery system 60, wherein the feeding system 10 is connected with the cyclone classification system 20 and is used for adding blast furnace dust into the cyclone classification system 20; the cyclone classification system 20 is connected with the flotation system 30 and is used for separating zinc-rich materials from blast furnace dust and obtaining first separation tailings; the flotation system 30 is connected with the gravity separation system 40 and is used for separating carbon-rich materials from the first separated tailings and obtaining second separated tailings; the gravity separation system 40 is connected with the cyclone classification system 20 and is used for separating carbon-rich materials from the second separation tailings and obtaining third separation tailings; the dehydration and filter pressing system 50 is respectively connected with the cyclone classification system 20, the flotation system 30 and the gravity separation system 40 and is used for dehydrating the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material; and a recovery system 60 is connected to the dewatering and pressure filtration system 50 for recovering the filtered water.
As described in the background art, in the metallurgical industry, a large amount of dust is generated in the production process of a blast furnace at present, and three pain points are often existed in the treatment of the dust by a steel plant: the blending harmfulness is caused because the blending requirement of a steel mill cannot be met due to the fact that the zinc and the like which are harmful to the operation of the blast furnace are contained; the external marketing is difficult because the rotary kiln is difficult to utilize due to low zinc content; the stacking is not environment-friendly, and dust, polluted soil, underground water and the like are easily caused. However, the contents of the three elements of carbon, iron and zinc are nearly half or so. For the blast furnace dust removal ash, the stacking is solid waste and is utilized as a resource. Therefore, how to extract and separate the three elements from the blast furnace dust becomes a hot topic.
At present, a blast furnace dust separation system capable of separating carbon powder, iron powder and zinc mud from blast furnace dust is urgently needed, so that elements such as carbon, iron and zinc can be fully separated from the blast furnace dust, and can become available resources.
In view of the above-mentioned technical problems, the present application provides a blast furnace fly ash separation system. The system mainly comprises a feeding system 10, a cyclone classification system 20, a flotation system 30, a gravity separation system 40, a dehydration and pressure filtration system 50 and a recovery system 60. The feeding system 10 is connected with the cyclone classification system 20, the cyclone classification system 20 is connected with the flotation system 30, the flotation system 30 is connected with the gravity separation system 40, the gravity separation system 40 is connected with the cyclone classification system 20, the dehydration and filter pressing system 50 is respectively connected with the cyclone classification system 20, the flotation system 30 and the gravity separation system 40, and the recovery system 60 is connected with the dehydration and filter pressing system 50. And wherein, the feeding system 10 is used for adding the blast furnace dust into the cyclone classification system 20, the cyclone classification system 20 is used for separating a zinc-rich material and a first separation tail material from the blast furnace dust, the flotation system 30 is used for separating a carbon-rich material and a second separation tail material from the first separation tail material, the gravity separation system 40 is used for separating a carbon-rich material and a third separation tail material from the second separation tail material, the cyclone classification system 20 is used for separating an iron-rich material and a zinc-rich material from the third separation tail material, the dehydration filter-pressing system 50 is used for dehydrating the separated slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material, and the recovery system 60 is used for recovering the filtered water generated after the dehydration operation of the dehydration filter-pressing system 50.
After the blast furnace fly ash is added into the feeding system 10, the feeding system 10 transmits the blast furnace fly ash to the cyclone classification system 20. The cyclone classification system 20 separates the zinc-rich material and the first separated tailings from the blast furnace fly ash, and then transmits the first separated tailings to the flotation system 30. The flotation system 30 separates the carbon rich material and the second separated tailings from the first separated tailings and transfers the second separated tailings to the gravity separation system 40. The gravity separation system 40 separates the carbon-rich material and the third separated tailings from the second separated tailings and transfers the third separated tailings to the cyclone classification system 20. The cyclone classification system 20 separates iron-rich materials and zinc-rich materials from the third separated tailings. Wherein the zinc-rich material, the carbon-rich material and the iron-rich material which are separated at the moment are all in the form of slurry.
The cyclone classification system 20 transmits the separated zinc-rich material and iron-rich material to the dehydration filter pressing system 50, the flotation system 30 transmits the separated carbon-rich material to the dehydration filter pressing system 50, and the gravity separation system 40 transmits the separated carbon-rich material to the dehydration filter pressing system 50. The dehydration and pressure filtration system 50 dehydrates the received zinc-rich material, iron-rich material and carbon-rich material. Zinc-rich products, namely zinc mud, iron-rich products, namely iron powder, carbon-rich products and carbon powder, which are generated after dehydration are firstly sent to respective product storehouses, and then returned to a steel mill for use or sold outside.
The filtered water produced by the dehydration filter press system 50 is delivered to the recovery system 60 through a filtrate tube. Wherein the recovery system 60 is a circulating water tank. Thus, the closed circulation of the system water is realized, and the waste water does not need to be discharged.
Therefore, the technical effect that carbon powder, iron powder and zinc mud can be separated from the blast furnace dust can be achieved through the product structure, and elements such as carbon, iron and zinc in the blast furnace dust can be effectively utilized. And then solved the current system that lacks a can follow the separation carbon dust, iron powder and zinc mud in the blast furnace dust removal that exists among the prior art for elements such as carbon, iron and zinc in the blast furnace dust removal can be by the technical problem of effective utilization.
Optionally, the cyclone classification system 20 comprises: a first classifier 210, a second classifier 220 and a third classifier 230, wherein the first classifier 210 is connected with the feeding system 10 and is used for separating zinc-rich materials from blast furnace dust; the second classifier 220 is connected with the first classifier 210 and is used for separating zinc-rich materials from fourth separated tailings, wherein the fourth separated tailings are tailings obtained after separation by the first classifier; and a third classifier 230 is connected to the gravity separation system 40 for separating the zinc-rich material and the iron-rich material from the third separation tailings.
Specifically, FIG. 2 is a schematic connection diagram of the cyclone classification system 20 in the blast furnace fly ash separation system shown in FIG. 1. Referring to fig. 1 and 2, the cyclone classification system 20 includes a first classifier 210, a second classifier 220, and a third classifier 230. The first classifier 210 is used for separating a zinc-rich material and a fourth separation tail from blast furnace dust, the second classifier 220 is used for separating a zinc-rich material from the fourth separation tail, and the third classifier 230 is used for separating a zinc-rich material and an iron-rich material from the third separation tail. Wherein, the fourth separation tail material is mixed slurry containing elements such as carbon, iron, zinc and the like.
The feeding system 10 feeds the blast furnace fly ash into the first classifier 210, and the first classifier 210 separates the zinc-rich material from the blast furnace fly ash and generates a fourth separated tail material. After receiving the fourth separation tailings, the second classifier 220 separates the zinc-rich material from the fourth separation tailings, and generates a first separation tailings. After receiving the third separation tailings transmitted by the gravity separation system 40, the third classifier 230 separates the zinc-rich material and the iron-rich material from the third separation tailings.
Therefore, the technical effects that the zinc-rich material and the iron-rich material can be fully separated from the blast furnace dust, and the recovery rate of zinc in the zinc-rich material and the grade of iron in the iron-rich material are improved are achieved through the product structure.
Optionally, the first classifier 210 is comprised of a plurality of first cyclones 211.
Specifically, referring to fig. 2, the first cyclone 211 is used to separate zinc-rich materials from blast furnace dust. Wherein the zinc-rich material separated from the blast furnace dust is in the form of slurry.
After the charging system 10 adds the blast furnace dust into the first classifier 210, the first cyclone 211 in the first classifier 210 separates out the zinc-rich material in the blast furnace dust to obtain a fourth separation tail material. Wherein the zinc-rich material separated from the blast furnace dust is in the form of slurry. The zinc-rich material is transported via an overflow pipe to a concentration tank 510 in the dewatering filter press system 50. The fourth separated tailings are transported to the second classifier 220 through a underflow pipe.
Therefore, the technical effects that the zinc-rich material can be successfully separated from the blast furnace dust, and then the zinc-rich material is concentrated and filter-pressed through the product structure, and finally the zinc mud is successfully obtained are achieved.
Optionally, the second classifier 220 consists of a plurality of second cyclones 221.
Specifically, referring to fig. 2, after the second cyclone 221 in the second classifier 220 receives the fourth separation tailings, the zinc-rich material in the fourth separation tailings is separated, and the first separation tailings is obtained.
After the fourth separation tailings are transferred to the second classifier 220 through the underflow pipe, the second cyclone 221 in the second classifier 220 separates the zinc-rich material from the fourth separation tailings, and obtains the first separation tailings. Wherein the zinc-rich material separated from the fourth separation tail is in the form of slurry. The zinc-rich material is transported via an overflow pipe to a concentration tank 510 in the dewatering filter press system 50. The first separation tails are transported to the flotation system 30 through the underflow pipe.
Therefore, the technical effects of separating the zinc-rich material in the blast furnace dust and improving the recovery rate of zinc in the zinc-rich material are achieved through the product structure.
Optionally, the third classifier 230 consists of a single third cyclone 231.
Specifically, referring to fig. 2, after the third cyclone 231 in the third classifier 230 receives the third separation tailings, the zinc-rich material and the iron-rich material are separated from the third separation tailings.
After the third separation tail is transferred to the third classifier 230, the third cyclone 231 in the third classifier 230 separates the zinc-rich material and the iron-rich material from the third separation tail. Wherein the zinc-rich material and the iron-rich material separated from the third separation tail material are both in the form of slurry. The iron-rich material is transported through the underflow pipe to the dewatering filter press system 50. The zinc-rich material is transported to the dewatering and pressure filtering system 50 through an overflow pipe.
Therefore, the technical effects of separating the zinc-rich material in the blast furnace dust removal ash and improving the recovery rate of zinc in the zinc-rich material and the grade of iron in the iron-rich material are achieved through the product structure.
Preferably, the first cyclones 211, the second cyclones 221 and the third cyclones 231 are different in structure and/or number.
Optionally, the flotation system 30 comprises: the first flotation system 310 and the second flotation system 320, wherein the first flotation system 310 is connected to the second classifier 220, and is configured to receive the first separation tailings and separate out coarse carbon-rich materials; and the second flotation system 320 is connected to the first flotation system 310 for separating the fine carbon-rich material from the coarse carbon-rich material.
Specifically, fig. 3 is a schematic connection diagram of the flotation system 30 in the blast furnace fly ash separation system shown in fig. 1. Referring to fig. 1 and 3, the flotation system 30 includes a first flotation system 310 and a second flotation system 320. The first flotation system 310 receives the first separation tailings and separates coarse carbon-rich material therefrom, and the second flotation system 320 receives the coarse carbon-rich material and separates fine carbon-rich material therefrom.
After receiving the first separation tailings conveyed by the second classifier 220, the first flotation system 310 in the flotation system 30 separates the coarse carbon-rich material from the first separation tailings. The second flotation system 320 then concentrates the coarse carbon-rich material to separate a refined carbon-rich material from the coarse carbon-rich material.
Furthermore, the extraction of the carbon-rich material adopts a conventional flotation method, and in order to further improve the grade of the carbon-rich material, a roughing process and a fine separation process are adopted to separate the high-grade carbon-rich material. The flotation system 30 employs a froth flotation process. The main process flow of the froth flotation method is as follows: the first separated tailings are added to a stirred tank where they are thoroughly mixed with the pharmaceutical agent. And the stirring tank sends the first separation tailings which are fully mixed with the medicament and are uniformly stirred into the flotation tank for stirring and aerating. The ore particles in the first separation tailing contact and collide with the air bubbles, the ore particles with good floatability are selectively adhered to the air bubbles and are carried by the air bubbles to rise to form a mineralized foam layer consisting of three phases of gas, liquid and solid, and the mineralized foam layer is mechanically scraped or overflows from a slurry tank. After the operation, the fine carbon-rich material is separated.
Therefore, the technical effect of separating high-grade carbon-rich materials is achieved through the product structure.
Optionally, the reselection system 40 comprises: a slurry tank 410 and a spiral chute 420, wherein the slurry tank 410 is connected with the flotation system 30; and the spiral chute 420 is connected to the slurry tank 410.
Specifically, FIG. 4 is a schematic connection diagram of the reselection system 40 in the blast furnace fly ash separation system shown in FIG. 1. Referring to fig. 1 and 4, the spiral chute 420 is used for separating iron-rich material and carbon-rich material from the second separated tailings according to density, and the slurry tank 410 is used for storing the second separated tailings.
The flotation system 30 diverts the second separated tailings to the slurry tank 410, which in turn pumps the second separated tailings from the slurry tank 410 into the spiral chute 420. During the flow of the second separated tailings along the body of the spiral chute 420, the particles in the second separated tailings are layered according to density. The movement speed of the heavy materials at the bottom layer is slow, and the heavy materials tend to move towards the inner edge of the groove body under the influence of the transverse gradient of the groove body; the light material moves along with the main flow of the second separation tailing and gradually tends to the outer edge of the groove body under the influence of centrifugal force. Therefore, the heavy material and the light material in the second separated tailing are spread and banded in the groove body of the spiral chute 420, the heavy material moving close to the inner edge of the spiral chute 420 is discharged through the inner ring material distributing port, and a part of iron-rich material is separated, and the light material is discharged through the outer ring material distributing port of the spiral chute 420, and carbon-rich material is separated.
Therefore, the technical effects that the iron-rich material and the carbon-rich material in the blast furnace dust can be separated according to the particle density and the grade of iron in the iron-rich material is improved are achieved through the product structure.
Optionally, the feeding system 10 comprises: the device comprises a storage bin 110, a gate valve 120, a screw conveyor 130, a water adding hopper 140 and a ball mill 150, wherein the gate valve 120 is arranged between the storage bin 110 and the screw conveyor 130; the screw conveyor 130 is connected with a water adding hopper 140; and a water feed hopper 140 is connected to the ball mill 150.
Specifically, FIG. 5 is a schematic connection diagram of the feed system 10 in the blast furnace fly ash separation system shown in FIG. 1. Referring to fig. 1 and 5, the feeding system 10 includes a hopper 110, a gate valve 120, a screw conveyor 130, a water adding hopper 140, and a ball mill 150. The storage bin 110 is mainly used for storing blast furnace dust, the gate valve 120 is mainly used for controlling supply of the blast furnace dust, the screw conveyer 130 is mainly used for conveying the blast furnace dust, the water adding feed hopper 140 is mainly used for adding water to the blast furnace dust, and the ball mill 150 is mainly used for mixing and size mixing the blast furnace dust.
The worker adds the blast furnace dust into the hopper 110 of the feeding system 10 and controls the opening and closing of the gate valve 120, so that the screw conveyor 130 can convey a predetermined amount of the blast furnace dust into the water adding hopper 140. After water is added to the blast furnace fly ash, the blast furnace fly ash enters the ball mill 150 by taking the water as a carrier to perform ball milling and size mixing, so that the blast furnace fly ash can reach a state suitable for the requirements of the cyclone classification system 20.
Thereby, reached through above-mentioned product structure and can add blast furnace fly ash according to the predetermined quantity to carry out ball-milling slurry mixing to blast furnace fly ash, make blast furnace fly ash can reach the technological effect who is fit for the state that whirl grading system 20 required.
Optionally, the dewatering press system 50 includes: a zinc mud concentration tank 510 and a zinc mud filter 520, wherein the zinc mud concentration tank 510 is connected with the first classifier 210, the second classifier 220 and the third classifier 230 respectively; and the zinc sludge filter 520 is connected to the zinc sludge thickening tank 510.
Specifically, referring to fig. 1, a zinc sludge thickening tank 510 and a zinc sludge filter 520 are provided in the dewatering and pressure filtering system 50. The zinc mud concentrating tank 510 is mainly used for concentrating zinc-rich materials, and the zinc mud filter 520 is mainly used for dewatering. Wherein the zinc mud filter 520 is a vacuum filter or a plate and frame filter.
The zinc sludge concentrating tank 510 receives the slurry containing the zinc-rich material transferred through the overflow pipe by the first classifier 210, the second classifier 220, and the third classifier 230, and then concentrates the slurry containing the zinc-rich material. The concentrated zinc-rich material is transmitted to the zinc mud filter 520, and the zinc mud filter 520 dehydrates the zinc-rich material to finally generate a zinc-rich product, namely zinc mud.
Therefore, the technical effect that the slurry containing the zinc-rich material can be concentrated and filtered to finally generate the zinc mud is achieved through the product structure.
Optionally, the dewatering press system 50 includes: a carbon powder concentrating tank 530 and a carbon powder filter 540, wherein the carbon powder concentrating tank 530 is connected with the second flotation system 320 and the spiral chute 420 respectively; and a carbon powder filter 540 is connected to the carbon powder thickening tank 530.
Specifically, referring to fig. 1, a carbon powder concentrating tank 530 and a carbon powder filter 540 are provided in the dewatering and pressure filtering system 50. The carbon powder concentrating tank 530 is mainly used for concentrating slurry containing carbon-rich materials, and the carbon powder filter 540 is mainly used for dewatering. Wherein, the carbon powder filter 540 is a vacuum filter or a plate and frame filter press.
The carbon powder concentration tank 530 receives the slurry containing the carbon-rich material transferred by the second flotation system 320 and the spiral chute 420, and then concentrates the slurry containing the carbon-rich material. The concentrated slurry containing the carbon-rich material is transferred to a carbon powder filter 540, and the carbon powder filter 540 dehydrates the carbon-rich material to finally generate a carbon-rich product, i.e., carbon powder.
Therefore, the technical effect that slurry containing carbon-rich material can be concentrated and filtered to finally generate carbon powder is achieved through the product structure.
Optionally, the dewatering press system 50 further comprises: a fine iron filter 550, wherein the fine iron filter 550 is connected to the third classifier 230.
Specifically, referring to FIG. 1, the dewatering press filtration system 50 also includes a fine iron filter 550, with the fine iron filter 550 being primarily used for dewatering. Wherein the iron powder filter 550 is a vacuum filter or a plate and frame filter.
After receiving the slurry containing the iron-rich material transmitted by the third classifier 230, the iron powder filter 550 dehydrates the slurry containing the iron-rich material to finally generate an iron-rich product, i.e., iron powder.
Therefore, the technical effect that the slurry containing the iron-rich material can be filtered to finally generate the iron powder is achieved through the product structure.
The system comprises a feeding system 10, a cyclone classification system 20, a flotation system 30, a gravity separation system 40, a dehydration and pressure filtration system 50 and a recovery system 60. The feeding system 10 adds the blast furnace fly ash to the cyclone classification system 20, and the cyclone classification system 20 separates the zinc-rich material and the first separation tail material from the blast furnace fly ash and transmits the first separation tail material to the flotation system 30. After receiving the first separation tailings, the flotation system 30 separates the carbon-rich material and the second separation tailings from the first separation tailings, and transmits the second separation tailings to the gravity separation system 40. After receiving the second separation tailings, the gravity separation system 40 separates the carbon-rich material and the third separation tailings from the second separation tailings, and transmits the third separation tailings to the cyclone classification system 20. After receiving the third separation tailings, the cyclone classification system 20 separates iron-rich materials and zinc-rich materials from the third separation tailings. After receiving the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material, the dewatering and filter-pressing system 50 dewaters the slurry containing the zinc-rich material, the iron-rich material and the carbon-rich material, and generates zinc mud, iron powder and carbon powder. Then the dewatering and filter-pressing system 50 transmits the filtered water generated after dewatering to the recovery system 60, and the recovery system 60 recovers the filtered water together and generates circulating water. Therefore, the technical effect that carbon powder, iron powder and zinc mud can be separated from the blast furnace dust can be achieved through the product structure, and elements such as carbon, iron and zinc in the blast furnace dust can be effectively utilized. And then the technical problem that a system capable of separating carbon powder, iron powder and zinc mud from blast furnace dust is absent at present in the prior art so that elements such as carbon, iron and zinc in the blast furnace dust can be effectively utilized is solved.
Further, the sintering machine head ash and blast furnace dust removal ash can be treated in a combined manner: separating the blast furnace dust and extracting carbon powder, iron powder and zinc mud, wherein the generated filter pressing water can be used for removing sylvite and sodium salt from the sintering machine head ash. The saturated solution obtained by mixing the sintering machine head ash and the filter pressing water enters an evaporative crystallization device to produce potassium chloride and sodium chloride, and evaporative crystallization cooling water returns to a blast furnace dedusting ash separation system to form closed cycle. The operation not only realizes the combined treatment and recycling of the sintering machine head ash and the blast furnace dust, but also realizes the recycling of the production water in the system.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …", "above … …", "above … …, on a surface", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are presented only for the convenience of describing and simplifying the disclosure, and in the absence of a contrary indication, these directional terms are not intended to indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the disclosure; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (9)
1. A blast furnace fly ash separation system, comprising: a feeding system (10), a cyclone classification system (20), a flotation system (30), a gravity separation system (40), a dehydration and pressure filtration system (50) and a recovery system (60), wherein
The feeding system (10) is connected with the cyclone classification system (20) and is used for adding blast furnace dust into the cyclone classification system (20);
the cyclone classification system (20) is connected with the flotation system (30) and is used for separating zinc-rich materials from the blast furnace dust and obtaining a first separation tail material;
the flotation system (30) is connected with the gravity separation system (40) and is used for separating carbon-rich materials from the first separation tailings and obtaining second separation tailings;
the gravity separation system (40) is connected with the cyclone classification system (20) and is used for separating carbon-rich materials from the second separation tailings to obtain third separation tailings;
the cyclone classification system (20) separates iron-rich materials and zinc-rich materials from the third separation tailings;
the dehydration and filter pressing system (50) is respectively connected with the cyclone classification system (20), the flotation system (30) and the gravity separation system (40) and is used for dehydrating slurry containing zinc-rich materials, carbon-rich materials and iron-rich materials;
the recovery system (60) is connected with the dehydration and pressure filtration system (50) and is used for recovering filtered water, and
the cyclone classification system (20) comprises: a first classifier (210), a second classifier (220) and a third classifier (230), wherein
The first classifier (210) is connected with the feeding system (10) and is used for separating zinc-rich materials from the blast furnace dust;
the second classifier (220) is connected with the first classifier (210) and is used for separating zinc-rich materials from fourth separation tailings, wherein the fourth separation tailings are tailings obtained after separation by the first classifier (210); and
the third classifier (230) is connected with the gravity separation system (40) and is used for separating zinc-rich materials and iron-rich materials from the third separation tailings.
2. The blast furnace precipitator ash separation system of claim 1, wherein the first classifier (210) is comprised of a plurality of first cyclones (211);
the second classifier (220) is composed of a plurality of second cyclones (221); and
the third classifier (230) consists of a single third cyclone (231).
3. The blast furnace fly ash separation system of claim 2, wherein the flotation system (30) comprises: a first flotation system (310) and a second flotation system (320), wherein
The first flotation system (310) is connected with the second classifier (220) and is used for receiving the first separation tailings and separating coarse carbon-rich materials; and
the second flotation system (320) is connected with the first flotation system (310) and is used for separating fine carbon-rich materials from the coarse carbon-rich materials.
4. The blast furnace fly ash separation system of claim 3, wherein the gravity concentration system (40) comprises: a slurry tank (410) and a spiral chute (420), wherein
The slurry tank (410) is connected with the first flotation system (310); and
the spiral chute (420) is connected with the slurry tank (410).
5. The blast furnace fly ash separation system of claim 4, wherein the feed system (10) comprises: a storage bin (110), a gate valve (120), a screw conveyor (130), a water feeding hopper (140) and a ball mill (150), wherein
The gate valve (120) is arranged between the bin (110) and the screw conveyor (130);
the screw conveyor (130) is connected with the water adding hopper (140); and
the water feeding hopper (140) is connected with the ball mill (150).
6. The blast furnace fly ash separation system of claim 5, further comprising: a dewatering press filtration system (50) wherein
And the dehydration and filter pressing system (50) is respectively connected with the cyclone classification system (20), the flotation system (30) and the gravity separation system (40) through a third classifier (230) and is used for dehydrating the slurry containing the zinc-rich material, the carbon-rich material and the iron-rich material.
7. The blast furnace fly ash separation system of claim 6, wherein the filter press system (50) comprises: a zinc mud concentration tank (510) and a zinc mud filter (520), wherein
The zinc mud concentrating tank (510) is respectively connected with the first classifier (210), the second classifier (220) and the third classifier (230); and
the zinc mud filter (520) is connected with the zinc mud concentration tank (510).
8. The blast furnace fly ash separation system of claim 7, wherein the filter press system (50) comprises: a carbon powder concentration tank (530) and a carbon powder filter (540), wherein
The carbon powder concentration tank (530) is respectively connected with the second flotation system (320) and the spiral chute (420); and
the carbon powder filter (540) is connected to the carbon powder concentration tank (530).
9. The blast furnace precipitator ash separation system of claim 8, wherein the dewatering and pressure filtration system (50) further comprises: an iron powder filter (550), wherein
The fine iron filter (550) is connected to the third classifier (230).
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| US4425228A (en) * | 1982-03-02 | 1984-01-10 | Bethlehem Steel Corporation | Wet-classifying method for recovery of carbon and iron-bearing particles |
| CN103551244A (en) * | 2013-11-21 | 2014-02-05 | 河北联合大学 | Method for recycling valuable elements from blast furnace flocculated dust |
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