CN117213174A - Dehydration production line and dehydration process for water-containing tailing sand - Google Patents
Dehydration production line and dehydration process for water-containing tailing sand Download PDFInfo
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- CN117213174A CN117213174A CN202310809291.8A CN202310809291A CN117213174A CN 117213174 A CN117213174 A CN 117213174A CN 202310809291 A CN202310809291 A CN 202310809291A CN 117213174 A CN117213174 A CN 117213174A
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- water
- tailing sand
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- reaction
- powder
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- 239000004576 sand Substances 0.000 title claims abstract description 77
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000018044 dehydration Effects 0.000 title claims abstract description 25
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000292 calcium oxide Substances 0.000 claims abstract description 30
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 28
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 21
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 21
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000010419 fine particle Substances 0.000 claims abstract description 9
- 239000000376 reactant Substances 0.000 claims abstract description 6
- 239000011362 coarse particle Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 14
- 238000004806 packaging method and process Methods 0.000 claims description 9
- 238000012856 packing Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000007795 chemical reaction product Substances 0.000 abstract description 3
- 239000012258 stirred mixture Substances 0.000 abstract 1
- 235000012255 calcium oxide Nutrition 0.000 description 23
- 235000011116 calcium hydroxide Nutrition 0.000 description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000001035 drying Methods 0.000 description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 description 7
- 235000010755 mineral Nutrition 0.000 description 7
- 239000011707 mineral Substances 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 7
- 239000003245 coal Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- -1 electric energy Substances 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 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
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the field of recycling of tailing resources, in particular to a dehydration production line and a dehydration process of water-containing tailing sand. The dewatering process of the water-containing tailings includes that the water-containing tailings sand is conveyed into a stirrer by an auger, calcium oxide powder is added into the stirrer in proportion, the stirred mixture is conveyed into a reaction bin by the auger after being uniformly stirred, calcium oxide in the reaction bin reacts with moisture in the water-containing tailings sand, and the reaction bin fully reacts and is conveyed into a grading device; the reactant and the dehydrated tailing sand powder firstly enter a vibrating screen of a first-stage grading device, coarse-particle tailing sand powder is firstly separated, fine particles separated by the first-stage grading device comprise calcium hydroxide particles, unreacted complete calcium oxide particles and some fine-particle tailing sand powder, and the fine-particle tailing sand powder is packaged after being winnowing by a winnowing machine of a second-stage grading device. The dehydration process does not need to additionally use energy consumption, and the reaction product can be reused.
Description
Technical Field
The invention relates to the field of recycling of tailing resources, in particular to a dehydration production line and a dehydration process of water-containing tailing sand.
Background
The tailing sand is a waste produced in the mining process, and the components of the tailing sand mainly comprise minerals, water and impurities. Minerals are the main components of the tailings sand, and comprise metal elements such as iron, copper, aluminum, manganese, tungsten and the like, and nonmetallic elements such as silicate, carbonate and the like. Water is an important component of the tailings sand, typically in an amount of more than 20%. The impurities include organic matters, microorganisms, heavy metals, etc.
The composition of the tailings has an important environmental impact. First, metallic and non-metallic elements in the tailings may contaminate the surrounding soil and water. These elements are released during the mining process, and as the tailings are transported and transported, they may penetrate into the ground water and surface water, and affect the water quality. In addition, heavy metal elements in the tailings sand can also cause harm to an ecological system, and the growth and the reproduction of organisms are affected. The moisture content in the tailing sand is higher, and geological disasters such as land subsidence and landslide are easily caused, and the stacking and transportation of the tailing sand need to occupy a large amount of land, and if the tailing sand is not properly treated, the surrounding ecological environment can be damaged.
An important application of recycling the tailing sand is as a raw material of building materials such as mortar, concrete, cement and the like, but the tailing sand needs to be dehydrated before use so as to be mixed with other raw materials in a powder form, and water is added to be used at a construction site. In the prior art, the tailing sand is dehydrated by external heating to dry water, and the method of kiln drying and physical draining and drying are adopted. The modes need to additionally use natural gas, coal or electric energy to provide heat energy, so that the energy consumption is high, and the recycling cost of the tailing sand is increased.
The tailing sand is huge in stock, a large amount of energy is consumed by adopting a dehydration mode in the prior art, and the cost of enterprises is increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a dehydration production line and a dehydration process of water-containing tailing sand, wherein the dehydration process adopts heat released in a chemical exothermic reaction to realize dehydration of the water-containing tailing sand, energy consumption is not required to be additionally used, and reaction products can be reused.
In order to solve the problems in the prior art, the invention discloses a dehydration production line of water-containing tailing sand, which comprises a mineral storage bin and a stirrer, wherein the mineral storage bin is connected to a feed inlet of the stirrer through a packing auger, the stirrer is connected with a reaction bin through a packing auger, the bottom of the reaction bin is connected to a grading device through a conveying belt, the grading device comprises a primary grading device and a secondary grading device, the primary grading device is a vibrating screen, the secondary grading device is a winnowing machine, and the grading device is connected with packaging equipment.
Preferably, the primary classification device comprises a coarse material outlet and a fine material outlet, wherein the coarse material outlet is connected with the packaging equipment, the fine material outlet is connected with the secondary classification device, and the discharge outlet of the secondary classification device is connected with the packaging equipment.
The dewatering process of the water-containing tailings comprises the steps that water-containing tailings are placed in an ore storage bin, the water-containing tailings are driven by an auger to enter a feed inlet of a stirrer, calcium oxide powder is added into the stirrer, wherein the weight of the calcium oxide powder is 10% -30% of that of the water-containing tailings, after the water-containing tailings are uniformly stirred in the stirrer, the calcium oxide powder is discharged from a discharge port at the bottom of the stirrer and is transmitted to a reaction bin through the auger, calcium oxide in the reaction bin reacts with moisture in the water-containing tailings, and calcium hydroxide generated by the reaction and the dewatered tailings are transmitted to a grading device through a conveyor belt after the reaction bin fully reacts; the reactant and the dehydrated tailing sand powder firstly enter a vibrating screen of a first-stage grading device, coarse-particle tailing sand powder is firstly separated out and packaged in the vibrating screen of the first-stage grading device, and fine particles separated by the first-stage grading device comprise calcium hydroxide particles, unreacted complete calcium oxide particles and some fine-particle tailing sand powder, and the fine-particle tailing sand powder is packaged respectively after being winnowed by a winnowing machine of a second-stage grading device.
Preferably, the stirring time in the stirrer is 10-30min, and the rotating speed is 2000r/h.
Preferably, the reaction bin comprises a plurality of reaction bins.
Preferably, the particle size of the tailing sand powder discharged from the bottom of the reaction bin is 20-140mu, and the particle size of the calcium hydroxide is 140-325mu.
The invention has the following action principle: calcium hydroxide is generated when calcium oxide is used for generating water, on one hand, dry calcium oxide powder is put into a stirrer, and the calcium oxide powder absorbs water in the water-containing tailing sand for reaction, so that the dehydration of the water-containing tailing sand is realized; on the other hand, a large amount of heat is released in the reaction process, and the drying effect can be achieved. The particle size of the calcium hydroxide generated by the reaction is mostly in the range of 140-325mu, and the particle size of the dehydrated tailing sand is mostly in the range of 20-140mu, so that the two can easily realize screening and grading.
The invention has the beneficial effects that: 1. the dehydration and drying of the water-containing tailing sand are realized through the water absorption and heat release of chemical reaction without externally applying heat energy. Compared with the prior art, the method for dehydrating the water-containing tailing sand by providing heat energy through natural gas, electric energy, coal combustion and the like, the method for generating the slaked lime by utilizing the reaction of the quicklime and the water is obviously more energy-saving and environment-friendly, the whole process has no extra energy consumption, and the generated slaked lime can be continuously utilized, so that the whole process is energy-saving and environment-friendly. 2. The final product comprises dewatered tailings sand and calcium hydroxide, which are packaged separately and can be reused.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Reference numerals:
1. a mineral storage bin; 2. a stirrer; 3. an auger; 4. a reaction bin; 5. a conveyor belt; 6. a classifying device; 61. a first stage classification device; 62. a secondary classification device; 63. a coarse material discharge port; 64. a fines discharge outlet; 7. packaging equipment.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
As shown in the attached drawing, the dehydration production line of the water-containing tailing sand comprises a mineral storage bin 1 and a stirrer 2, wherein the mineral storage bin 1 is connected to a feed inlet of the stirrer 2 through a packing auger 3, the stirrer 2 is connected with a reaction bin 4 through the packing auger 3, the bottom of the reaction bin 4 is connected to a grading device 6 through a conveying belt 5, the grading device 6 comprises a first-stage grading device 61 and a second-stage grading device 62, the first-stage grading device 61 is a vibrating screen, the second-stage grading device 62 is a winnowing machine, and the grading device 6 is connected with a packaging device 7.
Preferably, the primary classification device 61 comprises a coarse material discharge outlet 63 and a fine material discharge outlet 64, the coarse material discharge outlet 63 being connected to the packaging apparatus 7, the fine material discharge outlet 64 being connected to the secondary classification device 62, and the discharge outlet of the secondary classification device 62 being connected to the packaging apparatus 7.
The water-containing tailing sand and the calcium oxide are uniformly stirred in the stirrer 2, the uniformly mixed reactants are conveyed to the reaction bin 4 through the auger 3, the calcium oxide in the reaction bin 4 absorbs the water in the water-containing tailing sand to generate calcium hydroxide, and a certain time is required for the reaction, so that a plurality of reaction bins 4 are required to be arranged, and the reactants fully react in the reaction bins. The reaction time is also different according to the water content in the water-containing tailing sand and the addition amount of calcium oxide, and is generally 5-24 hours. The reaction products are conveyed to a primary grading device 61 and a secondary grading device 62 through a conveyor belt 5, wherein the primary reaction device is a vibrating screen, coarse separation and filtration are realized, and large-particle agglomerate tailing sand is left on the screen and is packed independently; and the calcium hydroxide with smaller particles, the fine powder tailing sand and the unreacted and complete calcium oxide powder are screened to be under the screen, and are conveyed into a secondary grading device 62 winnowing machine through a conveying belt, the particle size of the tailing sand is larger, the density is larger, the particle size of the calcium oxide and the calcium hydroxide is smaller, and the density is smaller, so that the calcium oxide and the calcium oxide can be screened through winnowing, and the calcium oxide can be respectively packaged for recycling after screening.
Obviously, powder escapes during the processing, so that a dust remover and the like are needed to be added in a stirrer, a classifying device and a workshop, and grinding equipment can be added after sieving to ensure uniform particle size of the product, which are common means in the prior art and are not repeated.
In the invention, the stirrer only needs to realize the stirring function, and the type, the size and the like are not limited, and the conveyer belt and the auger for conveying materials can be replaced according to actual conditions.
Practice shows that the adding proportion of the tailing sand and the calcium oxide in the ore storage bin 1 is approximately (15-25): 1, after uniform mixing, the calcium oxide can thoroughly absorb the water in the tailing sand, and the addition proportion can be adjusted according to the different water contents of the tailing sand. The reaction time is different according to actual conditions, the complete reaction can be realized within 5-24 hours generally, and the reaction heat can be released well, so that the tailing sand is dried.
The invention has the following action principle: calcium hydroxide is generated when calcium oxide is used for generating water, on the one hand, dry calcium oxide powder is put into the stirrer 2, and the calcium oxide powder absorbs water in the water-containing tailing sand for reaction, so that the dehydration of the water-containing tailing sand is realized; on the other hand, a large amount of heat is released in the reaction process, and the drying effect can be achieved. The particle size of the calcium hydroxide generated by the reaction is mostly in the range of 140-325mu, and the particle size of the dehydrated tailing sand is mostly in the range of 20-140mu, so that the two can easily realize screening and grading.
The invention has the beneficial effects that: 1. the dehydration and drying of the water-containing tailing sand are realized through the water absorption and heat release of chemical reaction without externally applying heat energy. Compared with the prior art, the method for dehydrating the water-containing tailing sand by providing heat energy through natural gas, electric energy, coal combustion and the like, the method for generating the slaked lime by utilizing the reaction of the quicklime and the water is obviously more energy-saving and environment-friendly, the whole process has no extra energy consumption, and the generated slaked lime can be continuously utilized, so that the whole process is energy-saving and environment-friendly. 2. The final product comprises dewatered tailings sand and calcium hydroxide, which are packaged separately and can be reused.
Taking natural gas as an example, the cost of the natural gas for drying per ton of the water-containing tailing sand is between 2000 and 3000 yuan per 100 tons of the water-containing tailing sand, and the cost of the natural gas for recycling one tailing sand pit can reach hundreds of thousands yuan or even millions yuan. The dehydration process reduces the investment of the part. In addition to its better economic benefits, more importantly, the natural gas provides heat energy and must generate a great amount of carbon dioxide, while the dehydration process of the invention is based on the principle of chemical reaction, on one hand, the moisture in the water-containing tailing sand is taken as a reactant to participate in the chemical reaction, and the moisture is converted into solid calcium hydroxide, and no longer exists as free water molecules, which is the key of dehydration of the process, on the other hand, the reaction is exothermic reaction, and a great amount of reaction heat is generated, and the reaction heat can further vaporize liquid water into steam, so that dehydration is further realized.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. The utility model provides a dehydration production line of water-containing tailing sand, includes ore storage storehouse, its characterized in that: still include the mixer, store up ore bin and connect the pan feeding mouth department at the mixer through the auger, the mixer passes through auger connection reaction storehouse, and the reaction storehouse bottom is connected to among the grading plant through the conveyer belt, grading plant includes one-level grading plant and second grade grading plant, one-level grading plant is the shale shaker, and second grade grading plant is the air separator, grading plant is connected with equipment for packing.
2. A dewatering line for aqueous tailings sand in accordance with claim 1 wherein: the first-stage classification device comprises a coarse material discharge port and a fine material discharge port, wherein the coarse material discharge port is connected with packaging equipment, and the fine material discharge port is connected with the second-stage classification device.
3. A dewatering line for aqueous tailings sand in accordance with claim 2 wherein: and a discharge port of the secondary classification device is connected with packaging equipment.
4. A dewatering process comprising a dewatering line for aqueous tailings sand as claimed in claim 3, wherein: the method comprises the steps that water-containing tailing sand is placed in an ore storage bin, the water-containing tailing sand is driven by an auger to enter a feed inlet of a stirrer, calcium oxide powder is added into the stirrer, the weight of the calcium oxide powder is 10% -30% of that of the water-containing tailing sand, after the water-containing tailing sand is uniformly stirred in the stirrer, the water-containing tailing sand is discharged from a discharge hole at the bottom of the stirrer and is transmitted to a reaction bin by the auger, calcium oxide in the reaction bin reacts with moisture in the water-containing tailing sand, and calcium hydroxide generated by the reaction and dehydrated tailing sand are transmitted to a grading device through a conveyor belt after the reaction bin fully reacts; the reactant and the dehydrated tailing sand powder firstly enter a vibrating screen of a first-stage grading device, coarse-particle tailing sand powder is firstly separated out and packaged in the vibrating screen of the first-stage grading device, and fine particles separated by the first-stage grading device comprise calcium hydroxide particles, unreacted complete calcium oxide particles and some fine-particle tailing sand powder, and the fine-particle tailing sand powder is packaged respectively after being winnowed by a winnowing machine of a second-stage grading device.
5. A process for dewatering aqueous tailings sand in accordance with claim 4 wherein: the stirring time in the stirrer is 10-30min, and the rotating speed is 2000r/h.
6. A process for dewatering aqueous tailings sand in accordance with claim 5 wherein: the reaction bin includes a plurality of.
7. A process for dewatering aqueous tailings sand in accordance with claim 6 wherein: the particle size of the tailing sand powder discharged from the bottom of the reaction bin is 20-140mu, and the particle size of the calcium hydroxide is 140-325mu.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310809291.8A CN117213174A (en) | 2023-07-04 | 2023-07-04 | Dehydration production line and dehydration process for water-containing tailing sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310809291.8A CN117213174A (en) | 2023-07-04 | 2023-07-04 | Dehydration production line and dehydration process for water-containing tailing sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117213174A true CN117213174A (en) | 2023-12-12 |
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ID=89048608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310809291.8A Pending CN117213174A (en) | 2023-07-04 | 2023-07-04 | Dehydration production line and dehydration process for water-containing tailing sand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117213174A (en) |
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2023
- 2023-07-04 CN CN202310809291.8A patent/CN117213174A/en active Pending
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