CN211412744U - Grading device suitable for recycling metals in iron-making blast furnace flue gas dust removal ash - Google Patents
Grading device suitable for recycling metals in iron-making blast furnace flue gas dust removal ash Download PDFInfo
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- CN211412744U CN211412744U CN201921863644.8U CN201921863644U CN211412744U CN 211412744 U CN211412744 U CN 211412744U CN 201921863644 U CN201921863644 U CN 201921863644U CN 211412744 U CN211412744 U CN 211412744U
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Abstract
The utility model discloses a grading device suitable for recovering metals in iron-making blast furnace flue gas dust removal ash, which comprises an air inlet pipe, a venturi, a grading material box and an air outlet pipe, wherein the air inlet end of the venturi is provided with the air inlet pipe; one end of the air inlet pipe is connected with the venturi, and the other end of the air inlet pipe is connected with the blast furnace dust removal cloth bag; a grading material box is arranged at the air outlet end of the venturi; an air outlet pipe is arranged at the air outlet end of the grading material box; the bottom of the grading material box is sequentially provided with four feed openings; one end of the air outlet pipe is connected with the grading material box, and the other end of the air outlet pipe is connected with dust removal equipment at the tail end of the blast furnace. Grading by adopting a horizontal blowing natural sedimentation mode on the basis of density difference among elements such as zinc, lead, iron, carbon and the like; the principle that the venturi can change the flow velocity of air flow is utilized, and lead, iron, zinc and carbon in dust cause different throwing points due to different densities and finally fall into corresponding bins. The utility model is suitable for recovering metals in the dust removed from the flue gas of the iron-making blast furnace.
Description
Technical Field
The utility model belongs to the technical field of waste recovery device, further belong to ironmaking blast furnace flue gas recovery device technical field, concretely relates to simple structure, easily installation uses reliably, is suitable for the grading plant of metal recovery in ironmaking blast furnace flue gas dust removal ash.
Background
The fly ash is roughly divided into flue gas fly ash and environment fly ash according to the source, and the flue gas fly ash is generated in the production process and is formed in high-temperature physicochemical reaction, and the physicochemical property of the flue gas fly ash is changed. In the blast furnace iron-making process, dry dust removal is generally adopted, and the main components of the generated gravity dust removal ash, cyclone dust removal ash and cloth bag dust removal ash are iron and carbon, while the traditional utilization method is to return the gravity dust removal ash, the cyclone dust removal ash and the cloth bag dust removal ash to a sintering system to be used as a part of sintering raw materials so as to achieve the recycling of the iron and the carbon. After the composition analysis and test, the inventor finds that the iron-making raw material is formed by sintering and pelletizing iron ore in a sintering plant, and the iron ore is accompanied by trace associated minerals such as zinc, lead and the like, cannot be effectively eliminated in the sintering plant, and enters a blast furnace along with the sintering and pelletizing to make iron and steel. In the whole iron-making process, because the metals do not reach the melting point, the metals enter dry-process dust removal ash along with flue gas, and in the process of returning the trace associated minerals to the original sintering system, because of the problem of continuous enrichment, accretion in the blast furnace is finally caused, and the yield of the iron-making system is finally influenced. Meanwhile, the content of metals such as zinc, lead and the like in the existing dust removal ash is mostly about 4 percent. The existing method for treating and utilizing the fly ash is to adopt a pyrometallurgical method for enrichment to ensure that the zinc content of the fly ash reaches about 40 percent, and then adopt a wet smelting method for purification. The pyrometallurgical enrichment process is to heat the fly ash by a rotary kiln to gasify the zinc element and then perform redox trapping to enter the hydrometallurgical process, but the pyrometallurgical enrichment production process has the following defects:
1. the smelting cost is increased, and the economic benefit of enterprises is influenced;
2. the residual residue cannot be effectively utilized;
3. harmful gases can be generated in the process of pyrometallurgical enrichment process to pollute the environment.
Therefore, the key for solving the problem is to research and develop a grading device which has a simple structure, is easy to install, is reliable to use and is suitable for recovering metals in the dust removed from the flue gas of the iron-making blast furnace.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, easily installation uses reliably, is suitable for the grading plant that metal was retrieved in the iron-smelting blast furnace flue gas dust removal ash.
The utility model aims at realizing the purpose, which comprises an air inlet pipe, a venturi tube, a grading material box and an air outlet pipe, wherein the air inlet end of the venturi tube is provided with the air inlet pipe; one end of the air inlet pipe is connected with the venturi, and the other end of the air inlet pipe is connected with the blast furnace dust removal cloth bag; a grading material box is arranged at the air outlet end of the venturi; an air outlet pipe is arranged at the air outlet end of the grading material box; the bottom of the grading material box is sequentially provided with four feed openings; one end of the air outlet pipe is connected with the grading material box, and the other end of the air outlet pipe is connected with dust removing equipment at the tail end of the blast furnace.
The utility model discloses constitute by intake pipe, venturi tube, hierarchical workbin, outlet duct, hierarchical workbin sets gradually plumbous workbin, iron work case, zinc workbin, carbon workbin from air inlet department. Because the blast furnace dust removal cloth bag belongs to a high-pressure container, the classification is carried out by adopting a horizontal blowing natural sedimentation mode on the basis of the density difference among elements such as zinc, lead, iron, carbon and the like; by utilizing the principle that the venturi tube can change the flow velocity of air flow, the blowing flow velocity of dust blown out by a blast furnace dust removal cloth bag is changed through the opening pipe diameter of the venturi tube, and finally flue gas air flow with a certain flow velocity is formed, and lead, iron, zinc and carbon in the dust cause different throwing points due to different densities and finally fall into corresponding bins. By setting the ejection speed and selecting a proper venturi, lead, iron, zinc, carbon and the like are separated, so that the relative content of each element reaches 40%. The utility model is miniaturized, the utility model can be attached to a steel mill and directly butted with a dry dust remover of the steel mill, thereby avoiding the midway transportation cost; the structure is simple, and the manufacturing cost is low; all elements are clearly distinguished; the grading process does not cause environmental pollution. The utility model has simple structure, easy installation and reliable use, and is suitable for recovering the metal in the dust removed from the flue gas of the iron-making blast furnace.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of FIG. 1;
FIG. 3 is a schematic view of the classification bin of the present invention;
fig. 4 is a top view of fig. 3.
In the figure: 1-air inlet pipe, 2-venturi tube, 3-grading bin, 31-lead bin, 32-iron bin, 33-zinc bin, 34-carbon bin, 35-supporting leg, 4-air outlet pipe, 5-blast furnace tail end dust removing equipment and 6-blast furnace dust removing cloth bag.
Detailed Description
The following description of the present invention is further illustrated with reference to the accompanying drawings, but the present invention is not limited in any way, and all changes made based on the teaching of the present invention fall into the protection scope of the present invention.
As shown in fig. 1-4, the utility model comprises an air inlet pipe 1, a venturi tube 2, a grading material box 3 and an air outlet pipe 4, wherein the air inlet end of the venturi tube 2 is provided with the air inlet pipe 1; one end of the air inlet pipe 1 is connected with the venturi 2, and the other end is connected with the blast furnace dust removal cloth bag 6; a grading material box 3 is arranged at the air outlet end of the venturi tube 2; an air outlet pipe 4 is arranged at the air outlet end of the grading material box 3; the bottom of the grading material box 3 is sequentially provided with four feed openings; one end of the air outlet pipe 4 is connected with the grading material box 3, and the other end is connected with the dust removing equipment 5 at the tail end of the blast furnace.
The grading bin 3 comprises a lead bin 31, an iron bin 32, a zinc bin 33, a carbon bin 34 and a support leg 35; the lead bin 31 is arranged at the air inlet; an iron bin 32, a zinc bin 33 and a carbon bin 34 are sequentially arranged behind the lead bin 31; and supporting legs 35 are arranged at the lower parts of the lead material bin 31, the iron material bin 32, the zinc material bin 33 and the carbon material bin 34.
The geometric dimensions of the lead material bin 31, the iron material bin 32, the zinc material bin 33 and the carbon material bin 34 are determined according to the material specific gravity and the flue gas flow rate of the dust removal cloth bag.
The bottom of the lead material bin 31, the iron material bin 32, the zinc material bin 33 and the carbon material bin 34 are provided with feed openings.
The utility model discloses a theory of operation and working process:
the utility model discloses constitute by intake pipe 1, venturi 2, hierarchical workbin 3, outlet duct 4, hierarchical workbin 3 sets gradually lead workbin 31, iron charge case 32, zinc workbin 33, carbon workbin 34 from air inlet department. Because the blast furnace dust removal cloth bag belongs to a high-pressure container, the classification is carried out by adopting a horizontal blowing natural sedimentation mode on the basis of the density difference among elements such as zinc, lead, iron, carbon and the like; by utilizing the principle that the venturi 2 can change the flow velocity of air flow, the blowing flow velocity of dust blown out by a blast furnace dust removal cloth bag is changed through the opening pipe diameter of the venturi 2, and finally the flue gas air flow with a certain flow velocity is formed, and lead, iron, zinc and carbon in the dust cause different throwing points due to different densities and finally fall into corresponding bins. By setting the ejection speed and selecting a proper venturi 2, lead, iron, zinc, carbon and the like are separated, so that the relative content of each element reaches 40%.
Claims (3)
1. The utility model provides a grading plant that is suitable for metal recovery in iron-smelting blast furnace flue gas dust removal ash, includes intake pipe (1), venturi (2), hierarchical workbin (3), outlet duct (4), characterized by: an air inlet pipe (1) is arranged at the air inlet end of the venturi (2); one end of the air inlet pipe (1) is connected with the venturi (2), and the other end is connected with the blast furnace dust removal cloth bag (6); the air outlet end of the venturi tube (2) is provided with a grading material box (3); an air outlet pipe (4) is arranged at the air outlet end of the grading material box (3); the bottom of the grading material box (3) is sequentially provided with four feed openings; one end of the air outlet pipe (4) is connected with the grading material box (3), and the other end is connected with a dust removing device (5) at the tail end of the blast furnace.
2. The grading device suitable for recovering metals in iron-making blast furnace flue gas dust removal ash according to claim 1, which is characterized in that: the grading bin (3) comprises a lead bin (31), an iron bin (32), a zinc bin (33), a carbon bin (34) and supporting legs (35); the lead bin (31) is arranged at the air inlet; an iron bin (32), a zinc bin (33) and a carbon bin (34) are sequentially arranged behind the lead bin (31); and supporting legs (35) are arranged at the lower parts of the lead material bin (31), the iron material bin (32), the zinc material bin (33) and the carbon material bin (34).
3. The grading device suitable for recovering metals in iron-making blast furnace flue gas dust removal ash according to claim 2, which is characterized in that: the bottom of the lead material bin (31), the iron material bin (32), the zinc material bin (33) and the carbon material bin (34) is provided with a feed opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863644.8U CN211412744U (en) | 2019-11-01 | 2019-11-01 | Grading device suitable for recycling metals in iron-making blast furnace flue gas dust removal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921863644.8U CN211412744U (en) | 2019-11-01 | 2019-11-01 | Grading device suitable for recycling metals in iron-making blast furnace flue gas dust removal ash |
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| Publication Number | Publication Date |
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| CN211412744U true CN211412744U (en) | 2020-09-04 |
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| CN201921863644.8U Active CN211412744U (en) | 2019-11-01 | 2019-11-01 | Grading device suitable for recycling metals in iron-making blast furnace flue gas dust removal ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546783A (en) * | 2020-11-10 | 2021-03-26 | 将乐三晶新材料有限公司 | Ore smelting furnace dust collector |
| CN112845086A (en) * | 2020-12-31 | 2021-05-28 | 山西烁科晶体有限公司 | Device and method for simultaneously sorting density and particle size of silicon carbide powder |
-
2019
- 2019-11-01 CN CN201921863644.8U patent/CN211412744U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112546783A (en) * | 2020-11-10 | 2021-03-26 | 将乐三晶新材料有限公司 | Ore smelting furnace dust collector |
| CN112845086A (en) * | 2020-12-31 | 2021-05-28 | 山西烁科晶体有限公司 | Device and method for simultaneously sorting density and particle size of silicon carbide powder |
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Effective date of registration: 20221101 Address after: No. 6 Xiangyang East Road, Kungang, Anning, Kunming, Yunnan 650300 Patentee after: YUNNAN TIANLANG ENERGY SAVING & ENVIRONMENTAL PROTECTION GROUP CO.,LTD. Address before: 650300 Luoyang Chi Village, Jinfang Street Office, Anning City, Kunming City, Yunnan Province Patentee before: YUNNAN TIANLANG RENEWABLE RESOURCES Co.,Ltd. |