CN220028184U - Comprehensive treatment system for waste heat utilization of steel slag and zinc-containing dust removal ash - Google Patents
Comprehensive treatment system for waste heat utilization of steel slag and zinc-containing dust removal ash Download PDFInfo
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- CN220028184U CN220028184U CN202321365966.6U CN202321365966U CN220028184U CN 220028184 U CN220028184 U CN 220028184U CN 202321365966 U CN202321365966 U CN 202321365966U CN 220028184 U CN220028184 U CN 220028184U
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- steel slag
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- closed cavity
- zinc
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- 239000002893 slag Substances 0.000 title claims abstract description 111
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 239000000428 dust Substances 0.000 title claims abstract description 41
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000011701 zinc Substances 0.000 title claims abstract description 25
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 25
- 238000011282 treatment Methods 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000010521 absorption reaction Methods 0.000 claims abstract description 14
- 230000036544 posture Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 16
- 239000011229 interlayer Substances 0.000 claims description 15
- 239000010881 fly ash Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 19
- 229910052742 iron Inorganic materials 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- 238000006722 reduction reaction Methods 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 4
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- 230000007613 environmental effect Effects 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000007885 magnetic separation Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
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- 239000002910 solid waste Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 244000126211 Hericium coralloides Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
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- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
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- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model belongs to the technical field of solid waste treatment of steel enterprises, and particularly relates to a comprehensive treatment system for steel slag waste heat utilization and zinc-containing dust removal; the stirring and crushing device comprises a closed cavity and a stirring and crushing mechanism, wherein the top of the closed cavity is provided with a feed inlet and a dust removal port, and the bottom of the closed cavity is provided with a discharge port; the stirring and crushing mechanism comprises a driving part, a stirring and crushing part and a pushing part which are coaxial, the shaft is a transverse shaft, the driving part drives the transverse shaft to rotate around the closed cavity, so that the stirring and crushing part and the pushing part sweep the closed cavity for a circle, and the transverse shaft is rotated to switch the postures of the stirring and crushing part and the pushing part; the heat absorption medium channel is arranged outside the closed accommodating cavity, and an inlet and an outlet of the heat absorption medium channel are connected with the heat exchange system; the high-temperature steel slag is cooled and crushed in a closed environment, no large dust is generated in the process, the steel slag cooled by external heat absorption is not contacted with water, iron components in the steel slag cannot be oxidized into weak-magnetism ferrous iron due to the high-temperature water, and the iron recovery benefit is increased to the greatest extent.
Description
Technical Field
The utility model belongs to the technical field of solid waste treatment of steel enterprises, and particularly relates to a comprehensive treatment system for steel slag waste heat utilization and zinc-containing dust.
Background
High temperature liquid steel slag is a byproduct of the steelmaking process. The iron is composed of various oxides formed by oxidizing impurities such as silicon, manganese, phosphorus, sulfur and the like in pig iron in the smelting process and salts generated by the reaction of the oxides and a solvent. Steel slag contains a number of useful components: 2-8% of metallic iron, 40-60% of calcium oxide, 3-10% of magnesium oxide and 1-8% of manganese oxide, so that the alloy can be used as a ferrous metallurgy raw material. The temperature of the liquid steel slag flowing out of the smelting furnace is high, about 1500 ℃, and after the liquid steel slag is discharged from the smelting furnace, the liquid steel slag needs to be further treated to quickly cool. The current high-temperature liquid steel slag treatment process method comprises the following steps: hot splashing method, roller method, pressured hot disintegrating method, disintegrating slag pool method. Various advantages and disadvantages are realized, and other processes are applied to different degrees except that the hot splashing method cannot be eliminated due to the fact that the organized emission cannot be realized. The main principle is that water is directly poured on the high-temperature liquid steel slag to quickly cool the steel slag. But all have a fundamental disadvantage: the high-temperature heat resource of the steel slag is wasted, a large amount of water vapor with dust is generated by spraying water to the high-temperature steel slag for cooling, the dust removing workload of the system is greatly increased, the operation energy consumption is high, the project investment can not be withdrawn through the operation of the project, and the cost burden of enterprises can only be further increased. The principle of the roller method is that high-temperature liquid steel slag is fed into a roller rotating at high speed, water is fed into the roller to be used as cooling medium, and the cooling medium is quenched, solidified and crushed. Has the advantages of fast slag discharge, small occupied area, small pollution and stable slag particle performance. The disadvantage is that a large amount of dust and water vapor is generated, and a dust removal system is required to be added. The cooling method is that water directly contacts with high-temperature steel slag, rapidly cools, iron and water molecules generate ferric oxide at high temperature, and the ferric oxide is weak in magnetism and is difficult to separate by a subsequent magnetic separation device, so that waste of steel is caused. Zinc-containing dust produced in the smelting process of blast furnaces, converters and electric furnaces of iron and steel enterprises belongs to harmful solid wastes, and zinc element is circularly enriched in the iron-making and steel-making processes, so that the blast furnaces, the converters and the like can be damaged. The current common treatment methods are rotary kiln and rotary hearth furnace process treatments or low price take-away. The rotary kiln method is not suitable for treating low-zinc dust with zinc content lower than 6%, and the rotary hearth furnace investment is too large to be suitable for small-batch treatment.
Disclosure of Invention
The utility model aims to solve the problems, and provides an energy-saving and environment-friendly treatment device for treating steel slag and dust at low cost, fully recycling heat energy of high-temperature steel slag, realizing dezincification of the dust and fully recycling zinc element.
The utility model adopts the following technical scheme: the comprehensive treatment system for utilizing the waste heat of the steel slag and removing zinc dust comprises a closed cavity and a stirring and crushing mechanism, wherein the top of the closed cavity is provided with a feed inlet and a dust removing port, and the bottom of the closed cavity is provided with a discharge port; the dust removing port is connected with a dust removing system, and a gate capable of being opened and closed is arranged at the discharge port;
the stirring and crushing mechanism comprises a driving part, a stirring and crushing part and a pushing part which are coaxially arranged in an included angle way, the shaft is a transverse shaft, the driving part drives the transverse shaft to rotate around the closed cavity, so that the stirring and crushing part and the pushing part sweep the closed cavity for a circle, and the transverse shaft is rotated to switch the postures of the stirring and crushing part and the pushing part;
and a heat absorption medium channel is arranged outside the closed accommodating cavity, and an inlet and an outlet of the heat absorption medium channel are used for being connected with a heat exchange system.
Further, the slag ladle further comprises a slag ladle and a ladle cover, wherein the ladle cover is suspended above the slag ladle, an annular gap between the slag ladle and the ladle cover is sealed by a flexible sealing belt, a closed cavity is formed inside the slag ladle, and the flexible sealing belt is disconnected along the circumferential direction and is used for the transverse shaft to pass through;
one end of the transverse shaft is connected with a rotating fulcrum in the closed cavity, the other end of the transverse shaft extends out of the closed cavity through an annular gap, the driving part comprises a driving trolley and an annular track taking the rotating fulcrum as a circle center, the transverse shaft is connected with the driving trolley, and the driving trolley walks along the annular track to push the transverse shaft to rotate.
Further, the stirring and crushing mechanism further comprises a cross beam, one end of the cross beam is connected with a rotary fulcrum in the closed cavity, and the other end of the cross beam is connected with the driving trolley through an annular gap.
Further, a supporting column is arranged at the center of the slag pot and is used as a rotation fulcrum.
Further, an annular containing cavity taking the supporting upright post as the center is formed in the slag pot, an interlayer is arranged on the wall and the bottom of the annular containing cavity, an inlet and an outlet of the interlayer are connected with a heat exchange system, a coil pipe is arranged on one surface of the pot cover, which is positioned in the closed containing cavity, and pipe orifices at two ends of the coil pipe are connected with the heat exchange system.
Further, the inside of the cross shaft is hollow and is communicated with the inner cooling liquid pore canal of the stirring and crushing part and the pushing part, one end of the cross shaft, which is connected with the supporting upright post, is provided with a rotary joint, the cross shaft is dynamically communicated with the inlet of the slag pot interlayer through the rotary joint, the outlet of the slag pot interlayer is connected with the liquid outlet pipe through the supporting upright post, and the outer ports of the cross shaft and the liquid outlet pipe are connected with the heat exchange system.
Further, a feeding system is arranged outside the feeding port, the feeding system comprises a feeding hopper and a crushing mechanism, the crushing mechanism comprises two reverse crushing plates, the crushing plates are arranged on two sides of the feeding hopper and are connected with the transverse pushing assembly, and a grid which can be unloaded is arranged below the crushing mechanism to seal the outlet of the feeding hopper; the outlet of the feed hopper is connected with a feed inlet of the closed cavity.
Further, the gate has a thickness nested with the discharge port and an edge overhanging the opposite discharge port to conceal the snap gap.
Further, the closed cavity is flat with a lateral dimension greater than the height.
Compared with the prior art, the utility model has the advantages that:
1. the high-temperature steel slag is cooled and crushed in a closed environment, and large dust is not generated in the process, so that the dust removal and environmental protection investment and energy consumption are saved. Compared with slag bed rolling heat crushing, the method predicts 50% lower environmental investment and more than 50% lower operation energy consumption.
2. The steel slag cooled by external heat absorption is not contacted with water, iron components in the steel slag cannot be oxidized into weak magnetic ferrous iron due to high temperature water, the iron recovery benefit is increased to the greatest extent, and the magnetic separation iron content can be expected to be improved by 20%.
3. The circulating water is subjected to heat exchange and temperature reduction to generate clean saturated steam or high-pressure superheated steam, so that additional benefits are brought to customers. It is expected that about 1.2 kilojoules of heat per ton of steel slag can be recovered by recovering the sensible heat of the high temperature steel slag, corresponding to 40kg of standard coal.
4. The solid waste low-zinc-content dust of the steel plant is cooperatively treated by the reduction environment of the high-temperature steel slag, so that the investment of dezincification equipment is greatly reduced, or the low-zinc-content dust sold outside by low price is avoided, and the economic benefit of the low-zinc-content dust is greatly improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic cross-sectional view of the present utility model;
FIG. 3 is a schematic structural view of a stirring and crushing mechanism;
in the figure: 1-a dust removal system; 2-gate; 3-stirring and crushing part; 4-a pushing part; 5-horizontal axis; 6-a slag pot; 6.1-interlayer; 7-a tank cover; 8-driving a trolley; 9-a circular track; 10-a cross beam; 11-supporting columns; 12-a liquid outlet pipe; 13-feeding hopper; 14-a crushing mechanism; 15-grid.
Detailed Description
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
As shown in fig. 1, 2 and 3: the comprehensive treatment system for utilizing the waste heat of the steel slag and removing zinc dust comprises a closed cavity and a stirring and crushing mechanism, wherein the top of the closed cavity is provided with a feed inlet and a dust removing port, and the bottom of the closed cavity is provided with a discharge port; the dust removal port is connected with a dust removal system 1, and a gate 2 which can be opened and closed is arranged at the discharge port.
The stirring and crushing mechanism comprises a driving part, a stirring and crushing part 3 and a pushing part 4 which are coaxially arranged to form an included angle, a transverse shaft 5 is arranged, the driving part drives the transverse shaft 5 to rotate around the closed cavity, so that the stirring and crushing part 3 and the pushing part 4 sweep the closed cavity for a circle, the transverse shaft 5 is rotated to switch the postures of the stirring and crushing part 3 and the pushing part 4, the operation mode of the stirring and crushing mechanism is adjusted, namely, one of the stirring and crushing part 3 and the pushing part 4 is operated, and the other is lifted by rotating the transverse shaft 5. Specifically, the pushing portion 4 is a pushing plate, and the stirring and crushing portion 3 is a comb-tooth structure.
And a heat absorption medium channel is arranged outside the closed accommodating cavity, and an inlet and an outlet of the heat absorption medium channel are used for being connected with a heat exchange system.
The dust removing system 1 sucks the dust and volatile zinc generated in the dezincification reaction process of the dust removing ash into the dust remover. Because the space is relatively closed, only part of external fresh air enters the feed inlet during feeding, and only smoke generated by reduction reaction in the closed accommodating cavity is generated after the feed inlet is closed, the dust-removing air quantity of the whole system is very small, and zinc soot trapped by the dust remover is taken out. The system is always in a negative pressure state in the whole feeding and running process, basically no smoke dust overflows, and the working environment is ensured to reach the standard.
Still include slag ladle 6 and cover 7, cover 7 hangs in slag ladle 6 top, and cover 7 sets up solitary outside and supports, and annular gap between slag ladle 6 and the cover 7 is sealed through flexible sealing tape, and inside forms seals the appearance chamber, prevents heat dissipation, and flexible sealing tape is along annular disconnection for cross axle 5 passes, and flexible sealing tape deformation of this department when cross axle 5 passes through, and flexible sealing tape can be high temperature resistant rubber tape or fire prevention cloth.
One end of the transverse shaft 5 is connected with a rotating fulcrum in the closed cavity, the other end of the transverse shaft extends out of the closed cavity through an annular gap, the driving part comprises a driving trolley 8 and an annular track 9 taking the rotating fulcrum as a circle center, the transverse shaft 5 is connected with the driving trolley 8, and the driving trolley 8 drives the transverse shaft 5 to rotate by walking along the annular track 9. The driving trolley 8 is driven by a speed reducing motor to walk on the annular track 9.
The stirring and crushing mechanism further comprises a cross beam 10, one end of the cross beam 10 is connected with a rotary fulcrum in the closed cavity, and the other end of the cross beam is connected with the driving trolley 8 through an annular gap.
The center of the slag pot 6 is provided with a supporting upright post 11, and the supporting upright post 11 is used as a rotation fulcrum for supporting the cross beam 10 and the cross shaft 5.
The slag pot 6 is internally formed into an annular containing cavity taking the supporting upright post 11 as the center, an interlayer 6.1 is arranged on the wall and the bottom of the annular containing cavity, the inlet and the outlet of the interlayer 6.1 are connected with a heat exchange system, a coil pipe is arranged on one surface of the pot cover 7 positioned in the closed containing cavity, and pipe orifices at two ends of the coil pipe are connected with the heat exchange system.
The stirring and crushing mechanism is used in a high-temperature environment in the slag pot 6 for a long time, and besides the high-temperature-resistant metal materials, the components of the stirring and crushing mechanism also need to cool the cross beam 10, the cross shaft 5, the stirring and crushing part 3 and the pushing part 4 by circulating cooling water so as to ensure the mechanical strength of the stirring and crushing mechanism.
The inside of the transverse shaft 5 is hollow and is communicated with the inner cooling liquid pore canal of the stirring and crushing part 3 and the pushing part 4, one end of the transverse shaft 5, which is connected with the supporting upright post 11, is provided with a rotary joint, the transverse shaft 5 is dynamically communicated with the inlet of the slag pot interlayer through the rotary joint, the outlet of the slag pot interlayer is connected with the liquid outlet pipe 12 through the supporting upright post 11, the outer ports of the transverse shaft 5 and the liquid outlet pipe 12 are connected with a heat exchange system, and a heat exchange medium enters the slag pot interlayer through the transverse shaft 5, the stirring and crushing part 3 and the pushing part 4 and then flows out through the liquid outlet pipe 12.
The total heat of the high-temperature steel slag which is reduced to about 300 ℃ from about 1500 ℃ is fully recovered through the circulation of three parts. The normal-temperature cooling water is introduced into the stirring and crushing mechanism by a water pump, the water after the stirring and crushing mechanism is cooled has a certain temperature rise, after the part of water is completely absorbed for the first time, the water enters an interlayer at the bottom and the side surface of the slag pot 6 to continuously absorb the heat of steel slag to realize the second heat absorption, the temperature of the water which is discharged from the interlayer is further increased and is accompanied by part of steam, the part of water and the steam upwards extend from the top of the pot cover 7 by a seamless steel pipe through the central supporting upright post 11 of the slag pot 6 to enter a water tank, after the steam-water separation is realized, the high-temperature water and the steam are respectively introduced into the radiation heat absorption pipe at the top of the pot cover 7 by a high-pressure pump to obtain high-quality high-temperature high-pressure steam, and the third heat absorption is realized. The grade of the steam obtained in the link can be adjusted according to the needs of customers. The saturated steam can be provided for other production links, and the high-temperature high-pressure steam which can be used for generating electricity can also be provided.
The feeding system is arranged outside the feeding port, the feeding system comprises a feeding hopper 13 and a crushing mechanism 14, the crushing mechanism 14 comprises two reverse crushing plates, the crushing plates are arranged on two sides of the feeding hopper 13 and are connected with the transverse pushing assembly, and a grid 15 which can be unloaded is arranged below the crushing mechanism 14 to seal the outlet of the feeding hopper 13; the outlet of the feed hopper 13 is connected with a feed inlet of the closed cavity. The liquid small steel slag with the aperture smaller than the grating rapidly enters the slag pot 6, the large steel slag is extruded and crushed by the extruding and crushing plate, and the large steel slag which cannot be crushed is lifted from the feeding system by the movable grating and is discharged to a designated area.
The initial temperature of the incoming steel slag is generally about 1500 ℃, the temperature is reduced to about 300 ℃, the slag is discharged from one or more discharge ports arranged at the bottom of the slag tank 6, when slag is discharged, a discharge port gate 2 at the bottom of the slag tank 6 is opened, the slag is closed after the slag is discharged, and the opening and the closing of the gate 2 are driven by a hydraulic push rod. The discharge gate and gate 2 set up into fan-shaped structure, gate 2 have with the nested thickness of discharge gate and the overhanging border that shields the lock clearance of relative discharge gate, the gate 2 upper portion area is basically fairly little with the discharge gate area promptly, and the lower part area is greater than the discharge gate area to ensure to realize sealedly, make liquid slag can not outflow.
The closed cavity is flat with transverse dimension larger than height. The height of the slag pot 6 is determined by the amount of the steel slag and the fly ash pressed balls which are treated at one time, and the height of the pot body is slightly higher than the thickness of the slag layer, so that the steel slag is prevented from overflowing. In principle, the thickness of the slag layer is kept as low as possible, so that the radiation heat absorption area is increased, and the treatment of the steel slag is completed once.
Firstly, preparing pressed balls from low zinc-containing fly ash according to a calculated formula suitable for reducing zinc and iron, putting a proper amount of fly ash pressed balls (corresponding to the amount of steel slag processed in each batch) into a slag tank 6 through a feeding system, and putting high-temperature steel slag to be processed into the slag tank 6 through the feeding system; in the process of feeding the high-temperature steel slag, the stirring and crushing mechanism is in a motion state so as to be beneficial to fully contacting and mixing the fly ash pressing balls and the high-temperature steel slag. Meanwhile, the dust removing system 1 is also in a working state, and the flue gas generated by the reduction reaction of the dust removing ash and the volatilized zinc ash are sucked away. Closing the feed inlet after the high-temperature steel slag feeding is finished, so as to reduce fresh air suction outside the system and reduce the work load of the dust removal system 1; when the high-temperature steel slag enters the slag tank 6, circulating water is introduced into the interlayer at the bottom and the side surface of the slag tank 6 to cool the slag tank 6 and absorb heat of the high-temperature steel slag.
In order to complete reduction of zinc and iron elements in the zinc-containing dust pressing balls, a proper amount of carbon is matched, reduction reaction is carried out under the action of high temperature of steel slag entering a tank, if the quantity of dust to be treated is large, when the heat of steel slag fed every day is insufficient for treating all pressing balls, in view of the fact that the boiling point of metal zinc is 906 ℃, when the temperature of the reduced steel slag in a closed cavity is reduced to 1000 ℃, a proper amount of semi-coke powder or pulverized coal is blown into the closed cavity at multiple points through a nozzle at the top of a tank cover 7 to support combustion, and the temperature of the steel slag in the tank is increased, so that the reduction reaction of all the dust pressing balls is completed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A steel slag waste heat utilization and zinc-containing dust removal comprehensive treatment system is characterized in that: the stirring and crushing device comprises a closed cavity and a stirring and crushing mechanism, wherein the top of the closed cavity is provided with a feed inlet and a dust removal port, and the bottom of the closed cavity is provided with a discharge port; the dust removing port is connected with a dust removing system (1), and a gate (2) which can be opened and closed is arranged at the discharge port;
the stirring and crushing mechanism comprises a driving part, a stirring and crushing part (3) and a pushing part (4) which are coaxially arranged in an included angle manner, wherein the shaft is a transverse shaft (5), the driving part drives the transverse shaft (5) to rotate around the closed cavity, so that the stirring and crushing part (3) and the pushing part (4) sweep the closed cavity for a circle, and the transverse shaft (5) is rotated to switch the postures of the stirring and crushing part (3) and the pushing part (4);
and a heat absorption medium channel is arranged outside the closed accommodating cavity, and an inlet and an outlet of the heat absorption medium channel are used for being connected with a heat exchange system.
2. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 1, wherein the system comprises the following components: the slag ladle comprises a slag ladle body (6) and a slag ladle cover (7), wherein the slag ladle cover (7) is suspended above the slag ladle body (6), an annular gap between the slag ladle body (6) and the slag ladle cover (7) is sealed by a flexible sealing belt, a closed cavity is formed inside the slag ladle body, and the flexible sealing belt is disconnected in the circumferential direction and used for a transverse shaft (5) to pass through;
one end of the transverse shaft (5) is connected with a rotating fulcrum in the closed cavity, the other end of the transverse shaft extends out of the closed cavity through an annular gap, the driving part comprises a driving trolley (8) and an annular track (9) taking the rotating fulcrum as a circle center, the transverse shaft (5) is connected with the driving trolley (8), and the driving trolley (8) drives the transverse shaft (5) to rotate along the annular track (9) in a walking mode.
3. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 2, wherein: the stirring and crushing mechanism also comprises a cross beam (10), one end of the cross beam (10) is connected with a rotary fulcrum in the closed cavity, and the other end of the cross beam is connected with the driving trolley (8) through an annular gap.
4. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 3, wherein: the center of the slag pot (6) is provided with a supporting upright post (11), and the supporting upright post (11) is used as a rotation fulcrum.
5. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 4, wherein: the slag pot (6) is internally formed into an annular containing cavity taking the supporting upright post (11) as the center, an interlayer (6.1) is arranged on the wall and the bottom of the annular containing cavity, the inlet and the outlet of the interlayer (6.1) are connected with a heat exchange system, a coil is arranged on one surface of the pot cover (7) positioned in the closed containing cavity, and pipe orifices at two ends of the coil are connected with the heat exchange system.
6. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 5, wherein the system comprises the following components: the inside hollow and with stirring the inside coolant liquid pore of crushing portion (3) and pushing away material portion (4) of cross axle (5) communicate, the one end that cross axle (5) connect support post (11) sets up rotary joint, makes cross axle (5) and the interbedded entry dynamic intercommunication of slag pot through rotary joint, the interbedded export of slag pot is connected with drain pipe (12) through support post (11), the outer port connection heat exchange system of cross axle (5) and drain pipe (12).
7. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 1, wherein the system comprises the following components: the feeding system is arranged outside the feeding port, the feeding system comprises a feeding hopper (13) and a crushing mechanism (14), the crushing mechanism (14) comprises two reverse crushing plates, the crushing plates are arranged on two sides of the feeding hopper (13) and are connected with the transverse pushing assembly, and an unloading grid (15) is arranged below the crushing mechanism (14) to seal the outlet of the feeding hopper (13); the outlet of the feed hopper (13) is connected with a feed inlet of the closed cavity.
8. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 1, wherein the system comprises the following components: the gate (2) is provided with a thickness which is nested with the discharge hole and an edge which stretches outwards relative to the discharge hole to shield the buckling gap.
9. The steel slag waste heat utilization and zinc-containing fly ash comprehensive treatment system according to claim 1, wherein the system comprises the following components: the closed cavity is flat with transverse dimension larger than height.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321365966.6U CN220028184U (en) | 2023-05-31 | 2023-05-31 | Comprehensive treatment system for waste heat utilization of steel slag and zinc-containing dust removal ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321365966.6U CN220028184U (en) | 2023-05-31 | 2023-05-31 | Comprehensive treatment system for waste heat utilization of steel slag and zinc-containing dust removal ash |
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| CN220028184U true CN220028184U (en) | 2023-11-17 |
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| CN202321365966.6U Active CN220028184U (en) | 2023-05-31 | 2023-05-31 | Comprehensive treatment system for waste heat utilization of steel slag and zinc-containing dust removal ash |
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