CN214168018U - Rotary drum suitable for seawater slag flushing - Google Patents
Rotary drum suitable for seawater slag flushing Download PDFInfo
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- CN214168018U CN214168018U CN202023070504.0U CN202023070504U CN214168018U CN 214168018 U CN214168018 U CN 214168018U CN 202023070504 U CN202023070504 U CN 202023070504U CN 214168018 U CN214168018 U CN 214168018U
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Abstract
The utility model relates to a rotary drum suitable for sea water is towards sediment, its partial component is the anticorrosive component of resistant sea water corrosion, and at least partial anticorrosive component is connected with the connecting elements who is different with this anticorrosive component material, the junction clamp between connecting elements and the anticorrosive component that corresponds is equipped with first electrical insulation isolation layer. The utility model provides a rotary drum adopts the anticorrosive component of resistant sea water corrosion to carry out anticorrosive treatment to the connection structure between anticorrosive component and the adjacent connection component, in order to prevent to produce galvanic reaction and intergranular corrosion between the two, make this rotary drum be applicable to sea water operational environment better, reduce manufacturing cost and the maintenance cost of rotary drum as far as possible simultaneously, other areas that are in the sea water operating mode, need adopt stainless steel and carbon steel to be connected can all adopt this kind of measure; and the seawater is adopted for slag flushing production, so that fresh water resources can be obviously saved, and the production cost of enterprises is reduced.
Description
Technical Field
The utility model belongs to the technical field of metallurgical equipment, concretely relates to rotary drum suitable for sea water dashes sediment.
Background
Blast furnace slag is a fusible mixture formed from gangue in ores, ash in fuels, fluxes and other substances that cannot enter pig iron in a blast furnace smelting process, and is one of the main by-products of blast furnaces. With the rapid development of steel production, the total amount of solid waste generated is more and more, wherein the blast furnace slag accounts for about 50%; the annual output of the blast furnace slag is considerable, if the blast furnace slag is not effectively utilized, a large amount of land resources are occupied, and the environment is polluted. The main components of the blast furnace slag are CaO and SiO2、Al2O3MgO, and small amount of FeO, MnO, CaS, etc., wherein CaO and SiO2The total of Al and Al is about 70%2O3Around 15%. The blast furnace slag is a silicate material with good performance, can be used as a raw material for producing cement after being treated, can save 45 percent of limestone raw material for producing cement, saves 50 percent of energy, and reduces 44 percent of carbon dioxide emission.
Blast furnace slag is processed mainly in the following three ways: naturally cooling the high-temperature furnace slag to become hard dry slag; crushing the high-temperature liquid slag by water quenching to obtain loose water slag; the high-temperature liquid slag is scattered by steam or compressed air to become fluffy slag wool. Because the dry slag treatment has serious environmental pollution and low resource utilization rate, the dry slag treatment is rarely used at present, and a dry slag pit or a slag tank is arranged for slag tapping only when an accident is treated. The application of the furnace front flushing slag is wider, the blast furnace granulated slag is a good method for comprehensive utilization, and the advanced blast furnace granulated slag is utilized by 100 percent. At present, the quality of the granulated slag can be ensured by all process equipment for flushing the granulated slag, the vitrification degree can reach 90-95 percent, the average granularity of the granulated slag is 0.2-3.0 mm, and the water content of the granulated slag is less than or equal to 15 percent; however, the water consumption of the method is extremely large, and 1.2-1.6 t of new water is consumed for every 1t of slag flushing.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a rotary drum suitable for sea water dashes sediment can solve prior art's partial defect at least.
The utility model relates to a rotary drum suitable for sea water is towards sediment, its partial component is the anticorrosive component of resistant sea water corrosion, and at least partial anticorrosive component is connected with the connecting elements who is different with this anticorrosive component material, the junction clamp between connecting elements and the anticorrosive component that corresponds is equipped with first electrical insulation isolation layer.
As an embodiment, the first electrically insulating and isolating layer comprises an acid-resistant rubber spacer.
As an embodiment, the first electrically insulating and isolating layer further comprises a sealant layer applied to the surface of the acid-resistant rubber separator.
In one embodiment, the connecting member and the corresponding corrosion prevention member are connected by a bolt assembly.
In one embodiment, the bolt assembly includes a bolt head and an adjacent member with a second electrically insulating spacer interposed therebetween.
As one embodiment, the second electrically insulating isolation layer includes a first acid-resistant rubber pad, and a first via hole for a bolt to pass through is correspondingly formed on the first acid-resistant rubber pad.
In one embodiment, the bolt assembly includes a third electrically insulating isolation layer interposed between the nut washer and the adjacent member.
As one embodiment, the third electrically insulating isolation layer includes a second acid-resistant rubber pad, and a second via hole for a bolt to pass through is correspondingly formed on the second acid-resistant rubber pad.
In one embodiment, the bolt assembly has a dacromet film layer on at least a portion of the surface of the device.
In one embodiment, the bolt holes of the connecting member and the corresponding corrosion prevention member are filled with an electrically insulating filler.
The utility model discloses following beneficial effect has at least:
the utility model provides a rotary drum adopts the anticorrosive component of resistant sea water corrosion to carry out anticorrosive treatment to the connection structure between anticorrosive component and the adjacent connection component, in order to prevent to produce galvanic reaction and intergranular corrosion between the two, make this rotary drum be applicable to sea water operational environment better, reduce manufacturing cost and the maintenance cost of rotary drum as far as possible simultaneously, other areas that are in the sea water operating mode, need adopt stainless steel and carbon steel to be connected can all adopt this kind of measure; and the seawater is adopted for slag flushing production, so that fresh water resources can be obviously saved, and the production cost of enterprises is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a drum according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of the corrosion prevention member and the connection member according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are described below clearly and completely, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the rotary drum is used as a main process equipment for flushing slag, and generally includes a rotary drum cylinder 1, a blade net 2, a slag trap 3, a distribution groove 4, an overflow groove, etc., and the specific structures of the components and the connection structures between the components are conventional in the art and will not be described herein.
At present, industrial water is generally adopted for slag flushing treatment of blast furnace slag, but the problem of high industrial water consumption exists, the environmental protection performance is poor, and the production cost is high. In the embodiment, seawater is adopted for flushing slag production to replace the traditional industrial flushing slag, so that the consumption of industrial water is reduced.
However, the seawater contains a large amount of salts which mainly contain NaCl, and the chloride content in the seawater accounts for 88.7 percent of the total salt content; since they are easily ionized, on the one hand, Cl in seawater-The content is very high (can reach 18.980 multiplied by 10)-6) On the other hand, the seawater has very high conductivity, and the average conductivity is about 4 x 10-2s/cm far exceeding 2X 10 of river water-2s/cm. Therefore, the metal surface in seawater is difficult to maintain stable passive state, electrochemical corrosion is easy to occur, deterioration and damage are easy to occur, and at present, the marine pollution tends to be serious, and the marine environmental factors are more complicated, so that the seawater corrosion problem of steel is more prominent. In the traditional rotary drum applied to the industrial water slag flushing treatment process, the selection of materials, the surface treatment process and the like can not meet the requirement of the seawater slag flushing treatment process.
In the drum provided by the embodiment, part of the components of the drum are anti-corrosion components 101 capable of resisting seawater corrosion, so that the drum is suitable for seawater slag flushing treatment.
Preferably, the service life of the frame structure of the rotary drum can reach the standard of 15 years and the service life of the wearing parts of the rotary drum can reach half a year or one year by means of material selection and/or surface treatment process and the like. In addition, the service life of the equipment is prolonged, and meanwhile, the manufacturing cost of the equipment is reduced as much as possible.
In one embodiment, the component parts which need to be frequently contacted with seawater, are easy to corrode under the working condition of seawater, bear the abrasion of blast furnace slag in the movement process and have large influence on the service life of equipment and are not suitable for adopting a spraying corrosion prevention contact measure are improved in the aspect of material selection and are made of seawater corrosion resistant stainless steel. Such component members include an outer net, a grid net, a blade net 2, and, for the structure in which the blade net 2 is defined by a blade net skeleton, the blade net skeleton also belongs to the above-described type of component member; at least one of them is made of seawater corrosion resistant grade stainless steel. In this embodiment, seawater corrosion resistant stainless steels such as 00Cr22Ni5Mo3N, 00Cr25Ni7Mo4N, 00Cr20Ni18Mo6Cu, 00Cr17Ni13Mo2N, 06Cr17Ni12Mo3Ti, and the like can be used.
Due to the consideration of cost, the rotary drum can not be made of seawater corrosion resistant stainless steel, and most of the rotary drum is made of other steel types such as common carbon steel or common stainless steel. A large number of parts of seawater corrosion resistant stainless steel and common carbon steel which need to be connected and fixed exist on the rotary drum (for example, the connection between the component members made of seawater corrosion resistant stainless steel and the corresponding installation members, for example, a blade net framework is installed on the inner wall of the rotary drum cylinder 1, the blade net framework is made of seawater corrosion resistant stainless steel, and the rotary drum cylinder 1 is made of plain carbon steel or 304 stainless steel); when the seawater corrosion resistant stainless steel material is connected with a carbon steel material, the stainless steel contains inert metal elements such as nickel, chromium and the like, the activity is reduced, the electrode potential is higher than that of common carbon steel, the stainless steel serves as a cathode, the carbon steel serves as an anode, a large amount of electrolyte is contained in seawater, so that galvanic reaction is formed, current can flow into a low-level electrode (cathode) through high-level electrode (anode) metal, so that the metal chemical energy is lost in the form of electric energy, the corrosion of the cathode metal is slowed due to protection, and the anode is corroded more quickly due to electron loss. Therefore, in this embodiment, the connection structure between the seawater corrosion resistant stainless steel member and the common carbon steel member (or the two components having a potential difference) needs to be subjected to corrosion prevention treatment to prevent galvanic reaction and intergranular corrosion between the two members.
The galvanic corrosion formation conditions must satisfy the following three conditions: firstly, two different materials have potential difference, the stainless steel contains nickel and chromium metal elements, the activity is reduced, the electrode potential is higher than that of common carbon steel, and the potential difference is formed after the stainless steel contacts the carbon steel; the two materials are in conductive connection, so that electrons between the two metals can be in contact conduction; and thirdly, the two materials are simultaneously positioned in the same corrosive medium, such as humid air and the like, so that an ion conducting branch of the corrosion battery can be formed.
Accordingly, as shown in fig. 2, the embodiment of the present invention provides a rotary drum, wherein a part of the components of the rotary drum is an anti-corrosion component 101 resistant to seawater corrosion, and the anti-corrosion component 101 is described in the foregoing, and can be an outer net, a grid net, a blade net 2, a blade net framework, etc. At least part of the corrosion prevention member 101 is connected with a connecting member 102 made of a material different from that of the corrosion prevention member 101, and the connecting member 102 is preferably a common carbon steel member or a common stainless steel member; a first electric insulation isolation layer 103 is arranged at the joint between the connecting member 102 and the corresponding anticorrosion member 101.
It is understood that the first electrically insulating and isolating layer 103 can isolate the connecting member 102 from the corresponding corrosion prevention member 101, and prevent the connecting member 102 from contacting with the corrosion prevention member 101 to generate a galvanic reaction. In one embodiment, the first electrically insulating barrier 103 comprises an acid-resistant rubber barrier capable of withstanding corrosion from seawater and preventing premature aging.
Further preferably, the first electrical insulation isolation layer 103 further comprises a sealant layer coated on the surface of the acid-resistant rubber separator. The sealant can ensure the connection reliability and tightness between the first electrical insulation isolation layer 103 and the adjacent component, so that the conventional corrosion prevention measures are not easy to fall off in the installation and use process, and seawater can be prevented from entering the gap between the first electrical insulation isolation layer 103 and the adjacent component, thereby preventing the connection surfaces of the connection component 102 and the corrosion prevention component 101 from being corroded by seawater; the structure is simple, the operation is easy, special anti-corrosion operation is not needed, and the cost is lower.
In a preferred scheme, as shown in fig. 2, the connecting member 102 is connected with the corresponding corrosion prevention member 101 through a bolt assembly. By adopting the bolt 104 connection mode, on the basis of the isolation by the first electrical insulation isolation layer 103, the non-contact type installation connection between the connecting member 102 and the corrosion-resistant member 101 can be realized, and the connecting member 102 and the corrosion-resistant member 101 are prevented from directly contacting on the premise of ensuring the stability and reliability of the installation connection structure.
Wherein, preferably, in the bolt assembly, at least part of the surface of the device is provided with a Dacromet film layer; preferably, both the bolt 104 and the nut 105 in the bolt assembly are subjected to the dacromet treatment, and if the nut washer 106 is used, the nut washer 106 is also preferably subjected to the dacromet treatment. The Dacromet film layer can better protect the bolt assembly and prevent the bolt assembly from being corroded by seawater.
Further preferably, as shown in fig. 2, in the bolt assembly, a second electrical insulation isolation layer 107 is sandwiched between the bolt head and the adjacent member. It will be appreciated that the second electrically insulating barrier layer 107 can isolate the bolt head from adjacent members, avoiding galvanic reactions due to contact between the bolt head and adjacent members. In one embodiment, the second electrically insulating isolation layer 107 includes a first acid-proof rubber pad, on which a first via hole for the bolt 104 to pass through is correspondingly formed; likewise, the acid-resistant rubber can bear the corrosion of seawater, so that the condition of premature aging is avoided.
Further preferably, as shown in fig. 2, in the bolt assembly, a third electrically insulating isolation layer 108 is sandwiched between the nut washer 106 and the adjacent component. It will be appreciated that the third electrically insulating spacer layer 108 can separate the nut washer 106 from adjacent components, preventing galvanic reaction from occurring due to contact between the nut washer 106 and adjacent components. In one embodiment, the third electrically insulating and isolating layer 108 includes a second acid-proof rubber pad, on which a second via hole for the bolt 104 to pass through is correspondingly formed; likewise, the acid-resistant rubber can bear the corrosion of seawater, so that the condition of premature aging is avoided.
Further preferably, as shown in fig. 2, the connecting member 102 and the bolt 104 of the corresponding corrosion prevention member 101 are filled with an electrically insulating filler 109. The inner wall of the hole of the bolt 104 is not convenient for corrosion protection, and the electric insulation filler 109 is used to fill the hole of the bolt 104, i.e. to fill the gap between the bolt 104 and the corresponding inner wall of the hole of the bolt 104, so as to prevent seawater from entering the hole of the bolt 104 and corroding the connecting member 102, and the electric insulation filler 109 can also play a role in isolating the bolt 104 from the adjacent member, thereby reducing the contact between the bolt 104 and the adjacent member and further delaying the corrosion of each member. Alternatively, it is also possible to use a material with better fluidity, such as grease, and an adhesive for the electrically insulating filler 109.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rotary drum suitable for seawater slag flushing is characterized in that: the seawater corrosion-resistant anti-corrosion component comprises a part of components, at least one part of components is connected with a connecting component made of a material different from that of the anti-corrosion component, and a first electric insulation isolation layer is clamped at the connecting position between the connecting component and the corresponding anti-corrosion component.
2. A rotary drum suitable for seawater slag flushing as claimed in claim 1, wherein: the first electrically insulating barrier layer comprises an acid-resistant rubber separator.
3. A rotary drum suitable for seawater slag flushing as claimed in claim 2, wherein: the first electric insulation isolation layer further comprises a sealing adhesive layer coated on the surface of the acid-resistant rubber partition plate.
4. A rotary drum suitable for seawater slag flushing as claimed in claim 1, wherein: the connecting members are connected with the corresponding anti-corrosion members through bolt assemblies.
5. A rotary drum suitable for seawater slag washing as claimed in claim 4, wherein: in the bolt assembly, a second electric insulation isolation layer is clamped between the bolt head and the adjacent component.
6. A rotary drum suitable for seawater slag washing as claimed in claim 5, wherein: the second electric insulation isolation layer comprises a first acid-resistant rubber base plate, and a first through hole for the bolt to penetrate is correspondingly formed in the first acid-resistant rubber base plate.
7. A rotary drum suitable for seawater slag washing as claimed in claim 4, wherein: in the bolt assembly, a third electric insulation isolation layer is clamped between the nut gasket and the adjacent component.
8. A rotary drum suitable for seawater slag flushing as claimed in claim 7, wherein: the third electric insulation isolation layer comprises a second acid-resistant rubber base plate, and a second through hole for the bolt to penetrate is correspondingly formed in the second acid-resistant rubber base plate.
9. A rotary drum suitable for seawater slag washing as claimed in claim 4, wherein: in the bolt assembly, at least part of the surface of the device is provided with a Dacromet film layer.
10. A drum as claimed in any one of claims 4 to 9 adapted for seawater slag flushing, wherein: and the bolt holes of the connecting member and the corresponding anti-corrosion member are filled with electric insulation fillers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023070504.0U CN214168018U (en) | 2020-12-18 | 2020-12-18 | Rotary drum suitable for seawater slag flushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023070504.0U CN214168018U (en) | 2020-12-18 | 2020-12-18 | Rotary drum suitable for seawater slag flushing |
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| Publication Number | Publication Date |
|---|---|
| CN214168018U true CN214168018U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023070504.0U Active CN214168018U (en) | 2020-12-18 | 2020-12-18 | Rotary drum suitable for seawater slag flushing |
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|---|---|
| CN (1) | CN214168018U (en) |
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- 2020-12-18 CN CN202023070504.0U patent/CN214168018U/en active Active
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