CN114618673B - Water-saving sand washing method for building slag soil materials - Google Patents
Water-saving sand washing method for building slag soil materials Download PDFInfo
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- CN114618673B CN114618673B CN202210335077.9A CN202210335077A CN114618673B CN 114618673 B CN114618673 B CN 114618673B CN 202210335077 A CN202210335077 A CN 202210335077A CN 114618673 B CN114618673 B CN 114618673B
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- 239000004576 sand Substances 0.000 title claims abstract description 252
- 238000005406 washing Methods 0.000 title claims abstract description 111
- 239000000463 material Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 33
- 239000002893 slag Substances 0.000 title claims abstract description 30
- 239000002689 soil Substances 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 79
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000011084 recovery Methods 0.000 claims abstract description 34
- 238000012216 screening Methods 0.000 claims abstract description 34
- 238000002844 melting Methods 0.000 claims abstract description 25
- 230000008018 melting Effects 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 238000004537 pulping Methods 0.000 claims abstract description 7
- 239000004575 stone Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 19
- 230000018044 dehydration Effects 0.000 claims description 11
- 238000006297 dehydration reaction Methods 0.000 claims description 11
- 239000004570 mortar (masonry) Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 4
- 229910000617 Mangalloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010494 dissociation reaction Methods 0.000 claims description 3
- 230000005593 dissociations Effects 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
- B03B5/56—Drum classifiers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment
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- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention provides a water-saving sand washing method for building slag materials, which comprises the following operation steps: pulping: mixing raw materials provided by a feeding mechanism through a slurry melting device to obtain slurry; and (3) screening: screening out stone blocks with the grain diameter of more than 5mm in the slurry by screening equipment to obtain mud sand slurry; presorting: pre-grading the silt slurry through a pre-grading cyclone to obtain underflow coarse sand and pre-grading overflow; sand washing: washing the underflow coarse sand by a sand washer to obtain coarse sand and washed sand overflow; fine sand recovery: recovering fine sand in the pre-grading overflow through a fine sand recovery cyclone, and adjusting the feeding concentration for fine sand recovery by utilizing sand washing overflow; dehydrating: and dewatering the coarse sand and the fine sand through a dewatering screen. The invention adopts a pre-grading mode, can effectively treat building slag soil materials with high mud content, can obtain clean finished sand without connecting a plurality of sand washers in series, improves sand washing efficiency and saves sand washing water.
Description
Technical Field
The invention relates to a method for treating and recycling building slag soil materials, in particular to a water-saving sand washing method for the building slag soil materials.
Background
The sand washing of the high-mud-content slag-soil material in the building industry is carried out after the slag-soil material is slurried into mud. The existing sand washing technology is that after slurry is formed, multistage sand washers are adopted for series connection, a large amount of clear water is added in the sand washing process, and after the multistage sand washers are used for washing for one time, fine sand is recycled for dehydration, so that a cleaner finished sand material is obtained. However, the process can increase equipment investment cost, the sand washer needs 3 or 4 stages in series to ensure the cleanliness of sand washing, meanwhile, the water consumption needs to reach the solid-liquid ratio of 1:3 or even 1:4, the equipment maintenance amount is increased in the actual production process, and the load of a sewage treatment system is increased.
In order to ensure that water resources are not largely circulated in the sand washing process, so that the investment of rear-end sewage treatment equipment and the load of the whole sand washing system are increased, and in order to reduce the investment of the whole factory selecting equipment, reduce the equipment maintenance amount and save the floor space of a factory, a novel water-saving sand washing method for building slag soil materials is necessary to solve the problems.
Disclosure of Invention
In order to solve the defects in the existing sand washing method for the high-mud-content building slag soil material, the invention aims to provide a water-saving sand washing method for the high-mud-content building slag soil material.
The embodiment of the invention can be realized by the following technical scheme:
a water-saving sand washing method for building slag materials comprises the following operation steps:
s1, pulping: mixing raw materials provided by a feeding mechanism through a slurry melting device to obtain slurry, wherein the raw materials comprise a muck material and water;
s2, screening: screening out stone blocks with the grain diameter of more than 5mm in the slurry by screening equipment to obtain mud sand slurry;
s3, pre-classification: presorting the silt slurry through a presorting cyclone to obtain underflow coarse sand and presorting overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25mm;
s4, sand washing: washing the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
s5, fine sand recovery: recovering fine sand in the pre-grading overflow through a fine sand recovery cyclone, and adjusting the feeding concentration for fine sand recovery by utilizing sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074mm;
s6, dehydration: and dewatering the coarse sand and the fine sand through a dewatering screen.
Further, in the step S1 slurry melting operation, the feeding mechanism consists of a vibrating mechanism and a slurry mixing tank, wherein the vibrating mechanism is used for avoiding raw material clogging, and the slurry mixing tank is used for fully mixing raw materials.
Further, in the step S1 slurry melting operation, the slurry melting equipment is drum-type equipment, a spiral guide groove is arranged in the slurry melting equipment, a motor driving device is arranged outside the slurry melting equipment, and the slurry melting equipment rotates clockwise along the tangential direction under the action of the motor driving device to drive the slag soil material and water to be mixed in the slurry melting equipment.
Further, in the screening operation of the step S2, screening equipment is arranged at the tail end of the pulping equipment, a double-layer roller type screening mechanism is adopted, an inner layer is made of wear-resistant steel plates with the thickness of 10mm, and a plurality of screen holes with the aperture of 10mm are formed in the inner layer and are used for avoiding impact of massive particles on an outer layer, and the outer layer is a wear-resistant manganese steel wire screen with the thickness of 5mm;
the spiral material guide mechanism is arranged in the screening equipment and used for standardizing the advancing direction of the slurry, so that the residence time of the slurry in the screening equipment is prolonged, and the screening efficiency is improved;
the tail end of the screening equipment is provided with a slit type sieve pore with the width of 5mm, and the slit type sieve pore is used for sieving stone with the particle size of more than 5 mm.
Further, in the pre-grading operation in step S3, the pre-grading cyclone is a large-diameter long-cone cyclone, a spiral line feeding body structure is adopted, a cone adopts a variable cone tapered cone angle, and the cone is used for pre-throwing away most of mud in mud and sand slurry, and meanwhile, the dissociation of mud and sand is promoted under a centrifugal force field, so that sand washing efficiency is improved.
Further, in the step S4 sand washing operation, the treated materials are mortar formed by the underflow coarse sand obtained through the step S3 grading operation, and the mud content of the mortar reaches the first-stage sand washing requirement.
Further, in the step S4 sand washing operation, the sand washer is a wheel type sand washer and comprises a sand washing wheel bucket, a lower overflow structure and a driving motor, wherein the lower overflow structure is used for strengthening classification, reducing turbulence in a groove and adjusting classification granularity.
Further, in the step S4 sand washing operation, additional water is added, and the water quantity of the additional water is adjusted according to the requirements on coarse sand washing and fine sand recovery.
Further, the materials processed in the fine sand recovery process in the step S5 are pre-grading overflow obtained in the pre-grading operation in the step S3, sand washing overflow obtained in the sand washing operation in the step S4 and undersize slurry obtained in the dewatering operation in the step S6.
Compared with the prior art, the water-saving sand washing method for the building slag soil material has the following advantages:
1. the water-saving sand washing method for the building slag soil material provided by the invention sequentially comprises the steps of slurry melting, screening, pre-grading, sand washing, fine sand recycling and dehydration during operation, so that the sand washing of the building slag soil material with high mud content is realized, and clean sand meeting building sand standards is obtained.
2. According to the water-saving sand washing method for the building slag soil materials, in order to reduce the water consumption for production, a cyclone pre-grading process is adopted, mortar after slurry melting is subjected to pre-grading treatment, a large amount of mud is prevented from being brought into a sand washer, and the sand washing difficulty of the sand washer is increased.
3. According to the water-saving sand washing method for the building slag soil materials, disclosed by the invention, the materials processed by the sand washer are mortar after pre-grading, the mud content is reduced, the sand washer can be used for obtaining clean finished sand through one-stage sand washing without adopting multistage serial connection.
4. According to the water-saving sand washing method for the building slag soil materials, disclosed by the invention, the materials treated by the fine sand recovery cyclone are the pre-stage overflow of the pre-stage cyclone, the sand washing overflow of the sand washer and the undersize slurry of the dewatering screen, and the sand washing overflow is controlled by adjusting the water quantity of the water supplement, so that the feeding concentration of fine sand recovery is adjusted, the requirement of fine sand recovery can be met, the accurate control of the sand washing water is realized, and the sand washing water is saved.
5. The water-saving sand washing method for the building slag soil materials, provided by the invention, can be used for collecting materials containing fine sand in each operation process in a concentrated manner to obtain a higher fine sand recovery rate, and can be used for effectively reducing water consumption through recycling sand washing water, so that the water-saving purpose is realized.
Drawings
FIG. 1 is a flow chart of a water-saving sand washing method of building slag materials according to an embodiment of the invention;
FIG. 2 is an apparatus and process flow diagram of a water-saving sand washing method for construction slag materials according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a sand washer according to an embodiment of the present invention.
Reference numerals in the figures
1: pulping equipment, 2: pre-classification cyclone, 3: sand washer, 4: fine sand recovery cyclone, 5: dewatering screen, 6: slurry pump, 7: slurry pump, 8: spiral baffle box, 9: tapered flat bottom structure, 10: wheel washing bucket, 11: lower overflow structure, 12: and a motor driving device.
Detailed Description
The present invention will be further described below based on preferred embodiments with reference to the accompanying drawings.
In addition, various components on the drawings are enlarged or reduced for ease of understanding, but this is not intended to limit the scope of the invention.
The singular forms also include the plural and vice versa.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the embodiments of the present invention conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, in the description of the present invention, terms first, second, etc. are used herein for distinguishing between different elements, but not limited to the order of manufacture, and should not be construed as indicating or implying any relative importance, as such may be different in terms of its detailed description and claims.
The terminology used in the description presented herein is for the purpose of describing embodiments of the invention and is not intended to be limiting of the invention. It should also be noted that unless explicitly stated or limited otherwise, the terms "disposed," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the two components can be connected mechanically, directly or indirectly through an intermediate medium, and can be communicated internally. The specific meaning of the above terms in the present invention will be specifically understood by those skilled in the art.
Referring to fig. 1 and 2, the invention provides a water-saving sand washing method for building slag materials, which comprises the following operation steps:
s1, pulping: mixing raw materials provided by a feeding mechanism through a slurry melting device to obtain slurry, wherein the raw materials comprise a muck material and water;
specifically, the muck material is fed into the slurry melting equipment 1 through a feeding mechanism, meanwhile, pressurized water is fed into the slurry melting equipment 1 through a high-pressure water distribution nozzle, and the water and the muck material are fully mixed in the rotating process of the slurry melting equipment 1 to obtain slurry for the subsequent operation step;
in some preferred embodiments of the invention, the muck materials are conveyed to a feeding platform through a forklift and fed into a feeding mechanism, two rows of high-pressure water distribution spray heads are arranged at the upper part of the feeding mechanism, water is pumped to the high-pressure water distribution spray heads through a clean water pump by a clean water tank, and mud-water mixing is carried out on the feeding mechanism; the feeding mechanism consists of a vibrating mechanism and a slurry mixing pool, wherein the vibrating mechanism is used for avoiding raw material clogging, and the slurry mixing pool is used for fully mixing raw materials.
In some preferred embodiments of the invention, the slurrying equipment 1 is a drum-type equipment, a spiral guide chute 8 is arranged inside, a motor driving device is arranged outside, and the slurrying equipment 1 rotates clockwise along the tangential direction under the action of the motor driving device to drive the residue soil material and water to mix inside to form slurry.
S2, screening: screening out stone blocks with the grain diameter of more than 5mm in the slurry by screening equipment to obtain mud sand slurry;
in some preferred embodiments of the present invention, the screening device and the slurry melting device 1 adopt an integrated construction mode, specifically, the screening device is arranged at the tail end of the slurry melting device 1, a double-layer drum type screening mechanism is adopted, the inner layer is made of wear-resistant steel plates with the thickness of 10mm and is provided with a plurality of sieve holes with the aperture of 10mm, the sieve holes are used for avoiding the impact of massive particles on the outer layer, and the outer layer is a wear-resistant manganese steel wire screen with the thickness of 5mm; the spiral material guide mechanism is arranged in the screening equipment and used for standardizing the advancing direction of the slurry, so that the residence time of the slurry in the screening equipment is prolonged, and the screening efficiency is improved; the tail end of the screening equipment is provided with a slit type sieve mesh with the width of 5mm, the slurry is graded by 5mm in the rotating process, wherein the materials such as stones with the particle size of more than 5mm enter a waste rock storage yard, and the rest of the silt slurry enters a sand washing material pool.
S3, pre-classification: presorting the silt slurry through a presorting cyclone to obtain underflow coarse sand and presorting overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25mm;
specifically, mud and sand slurry in the sand washing material pool is pumped to the pre-grading cyclone 2 through the slurry pump 6, grading is carried out in the pre-grading cyclone 2, the slurry is centrifugally moved in the pre-grading cyclone 2 under the condition of pressurized feeding, centrifugal forces are different due to different particle specific gravities, coarse particles move downwards along the circumference to form underflow coarse sand and are discharged to the sand washing machine 3 from a sand setting port, and the rest of slurry containing fine particles rotates upwards along an axis and is discharged to the fine sand washing material pool from an overflow port as pre-grading overflow;
in some preferred embodiments of the invention, the pre-classifying cyclone 2 is a large-diameter long-cone cyclone, adopts a spiral line feeding body structure, adopts a variable cone tapered cone angle for cone, and is used for pre-polishing most of mud in mud slurry, and simultaneously promoting the dissociation of mud and sand under a centrifugal force field, so that the sand washing efficiency is improved;
the presorting cyclone 2 adopts a tapered flat bottom structure 9, the tapered flat bottom structure 9 is beneficial to concentrating and grading materials with higher mud content, the presorting grading granularity can be effectively controlled, in the embodiment of the invention, the presorting grading granularity is controlled to be 0.15-0.25 mm, namely, the grain size lower limit of coarse sand obtained through presorting operation is 0.15-0.25 mm, grains with the bottom larger than the grain size lower limit form underflow coarse sand to enter the sand washer 3, and the rest slurry containing grains with the grain size smaller than the grain size lower limit is discharged into a fine sand material pool from an overflow port as presorting overflow.
S4, sand washing: washing the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
in the embodiment of the invention, the underflow coarse sand obtained in the step S3 enters the sand washer 3, is elutriated in the sand washer 3 in the form of mortar, the coarse sand obtained after the elutriation is fished out and is sent into the dehydration equipment, and the rest slurry containing fine sand is discharged into a fine sand material pool as sand washing overflow, and as the mud sand in the mortar is fully decomposed, the mud content reaches the 1-level sand washing requirement, thereby avoiding the increase of sand washing difficulty caused by bringing a large amount of mud into the sand washer 3, and avoiding the multi-stage sand washing, so as to realize the effect of saving sand washing water;
in the embodiment of the invention, a wheel type sand washer is adopted for sand washing operation, water is added in the sand washing process, the wheel type sand washer is used for washing coarse sand in the process of rotating a wheel bucket, the coarse sand is fished out through the wheel bucket, fig. 3 shows a schematic structural diagram of the sand washer 3 according to one specific embodiment of the invention, the sand washer 3 comprises a sand washing wheel bucket 10, a lower overflow structure 11 and a motor driving device 12, the sand washing wheel bucket 10 is driven to rotate by a driving belt under the action of the motor driving device 12, the coarse sand is fished out after being washed in a sand washing groove, other slurry containing fine sand enters the lower overflow structure 11, the lower overflow structure 11 can be used for strengthening classification, turbulence in the groove is reduced, the classification granularity of the sand washing overflow can be flexibly adjusted, the classification granularity of the sand washing overflow is the same as the classification granularity of the pre-classification in the step S3, and the slurry containing fine sand after classification enters a fine sand pool in the embodiment of the invention;
in some preferred embodiments of the present invention, the amount of water added in the sand washing operation in step S4 is adjusted according to the requirements for coarse sand washing and fine sand recovery, and by adjusting the amount of water added to the sand washer 3, the washed coarse sand can meet the requirements for cleanliness and the like, and at the same time, the flow rate of sand washing overflow entering the fine sand material pond can be adjusted, and further, the adjustment of the feed concentration for fine sand recovery can be realized, so as to meet the requirements for fine sand recovery, and higher fine sand recovery rate can be realized.
S5, fine sand recovery: recovering fine sand in the pre-grading overflow through a fine sand recovery cyclone, and adjusting the feeding concentration for fine sand recovery by utilizing sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074mm;
in some embodiments of the present invention, the material processed in the fine sand recovery process in step S5 is a pre-grading overflow obtained in the pre-grading operation in step S3 and a sand washing overflow obtained in the sand washing operation in step S4, after each material enters a fine sand material pool, the material is pumped to the fine sand recovery cyclone 4 by a slurry pump 7, fine sand particles with the particle size of more than 0.074mm are recovered under the action of a centrifugal force field of the fine sand recovery cyclone 4, the recovered fine sand enters a dehydration device, and the upper overflow of the fine sand recovery cyclone 4 is wastewater after sand washing and enters a wastewater treatment system.
S6, dehydration: dewatering coarse sand and fine sand through a dewatering screen;
specifically, coarse sand fished out by the sand washing wheel hopper 10 of the sand washing machine 3 and fine sand recovered by the fine sand recovery cyclone 4 jointly enter the dewatering screen 5 to be dewatered, the screen surface of the dewatering screen 5 is discharged to be finished sand, and in some preferred embodiments of the invention, undersize slurry is returned to a fine sand material pool to further improve the recovery rate of fine sand, and finally the whole sand washing process is completed.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (8)
1. The water-saving sand washing method for the building slag soil material is characterized by comprising the following operation steps of:
s1, pulping: mixing raw materials provided by a feeding mechanism through a slurry melting device to obtain slurry, wherein the raw materials comprise a muck material and water;
s2, screening: screening out stone blocks with the grain diameter of more than 5mm in the slurry by screening equipment to obtain mud sand slurry;
s3, pre-classification: presorting the silt slurry through a presorting cyclone to obtain underflow coarse sand and presorting overflow, wherein the lower limit of the particle size of the coarse sand is 0.15mm to 0.25mm;
s4, sand washing: washing the underflow coarse sand by a sand washer to obtain coarse sand for dehydration and sand washing overflow;
s5, fine sand recovery: recovering fine sand in the pre-grading overflow through a fine sand recovery cyclone, and adjusting the feeding concentration for fine sand recovery by utilizing sand washing overflow, wherein the lower limit of the particle size of the fine sand is 0.074mm;
s6, dehydration: dewatering coarse sand and fine sand through a dewatering screen;
in the pre-classifying step S3, particles with the bottom larger than the lower limit of the particle size of coarse sand form underflow coarse sand, the underflow coarse sand enters a sand washer, and the rest of slurry containing particles with the lower limit of the particle size is discharged into a fine sand material pool from an overflow port as pre-classifying overflow;
in the step S4 sand washing operation, the underflow coarse sand obtained in the step S3 enters a sand washer, and is washed in the sand washer in the form of mortar, the mud content of the mud sand in the mortar reaches the 1-level sand washing requirement, multi-stage sand washing is not needed,
step S4, in the sand washing operation, the coarse sand obtained after washing is fished out and sent into a dehydration device, and the rest slurry containing fine sand is discharged into a fine sand material pool as sand washing overflow;
the materials processed in the fine sand recovery process in the step S5 are pre-grading overflow obtained in the pre-grading operation in the step S3 and sand washing overflow obtained in the sand washing operation in the step S4, after the materials enter a fine sand material pool, the materials are pumped to a fine sand recovery cyclone through a slurry pump, and the upper overflow of the fine sand recovery cyclone is waste water after sand washing and enters a waste water treatment system.
2. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the step S1 of the slurry melting operation, the feeding mechanism consists of a vibrating machine and a slurry mixing tank, wherein the vibrating machine is used for avoiding raw material clogging, and the slurry mixing tank is used for fully mixing raw materials.
3. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the step S1 of the slurry melting operation, the slurry melting equipment is drum-type equipment, a spiral guide groove is arranged in the slurry melting equipment, a motor driving device is arranged outside the slurry melting equipment, and the slurry melting equipment rotates clockwise along the tangential direction under the action of the motor driving device to drive the slag soil materials and water to be mixed in the slurry melting equipment.
4. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the step S2 of screening operation, screening equipment is arranged at the tail end of the pulping equipment, a double-layer drum-type screening mechanism is adopted, an inner layer is made of wear-resistant steel plates with the thickness of 10mm and provided with a plurality of sieve holes with the aperture of 10mm, the sieve holes are used for avoiding impact of massive particles on an outer layer, and the outer layer is a wear-resistant manganese steel wire screen with the thickness of 5mm;
the spiral material guide mechanism is arranged in the screening equipment and used for standardizing the advancing direction of the slurry, so that the residence time of the slurry in the screening equipment is prolonged, and the screening efficiency is improved;
the tail end of the screening equipment is provided with a slit type sieve pore with the width of 5mm, and the slit type sieve pore is used for sieving stone with the particle size of more than 5 mm.
5. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the pre-grading operation of step S3, the pre-grading cyclone is a large-diameter long-cone cyclone, a spiral line feeding body structure is adopted, a cone adopts a variable cone tapered cone angle, and the cone is used for pre-throwing most of mud in the mud sand slurry, and meanwhile, the dissociation of the mud sand is promoted under a centrifugal force field, so that the sand washing efficiency is improved.
6. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the step S4 sand washing operation, the sand washer is a wheel type sand washer and comprises a sand washing wheel bucket, a lower overflow structure and a driving motor, wherein the lower overflow structure is used for strengthening classification, reducing turbulence in a groove and adjusting classification granularity.
7. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
in the step S4 sand washing operation, additional water is added, and the water quantity of the additional water is adjusted according to the requirements on coarse sand washing and fine sand recovery.
8. A water-saving sand washing method for building slag materials as set forth in claim 1, wherein:
the materials processed in the fine sand recovery process in the step S5 are pre-grading overflow obtained in the pre-grading operation in the step S3, sand washing overflow obtained in the sand washing operation in the step S4 and undersize slurry obtained in the dewatering operation in the step S6.
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