CN111495938A - Preparation process for preparing radiation-proof mortar by using lead-zinc tailing sand - Google Patents
Preparation process for preparing radiation-proof mortar by using lead-zinc tailing sand Download PDFInfo
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- CN111495938A CN111495938A CN202010379365.5A CN202010379365A CN111495938A CN 111495938 A CN111495938 A CN 111495938A CN 202010379365 A CN202010379365 A CN 202010379365A CN 111495938 A CN111495938 A CN 111495938A
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- processing equipment
- tailing sand
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- grinding
- lead
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- 239000004576 sand Substances 0.000 title claims abstract description 88
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 38
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 75
- 238000012545 processing Methods 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000000839 emulsion Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011398 Portland cement Substances 0.000 claims abstract description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229910052601 baryte Inorganic materials 0.000 claims abstract description 7
- 239000010428 baryte Substances 0.000 claims abstract description 7
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000012216 screening Methods 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 10
- 230000003471 anti-radiation Effects 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 230000033001 locomotion Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- OCKPCBLVNKHBMX-UHFFFAOYSA-N butylbenzene Chemical compound CCCCC1=CC=CC=C1 OCKPCBLVNKHBMX-UHFFFAOYSA-N 0.000 claims 4
- 238000002386 leaching Methods 0.000 abstract description 7
- 239000002174 Styrene-butadiene Substances 0.000 abstract description 5
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011115 styrene butadiene Substances 0.000 abstract description 5
- 229920003048 styrene butadiene rubber Polymers 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000012615 aggregate Substances 0.000 abstract description 3
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000003860 storage Methods 0.000 description 18
- 239000011133 lead Substances 0.000 description 9
- 239000002585 base Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000005251 gamma ray Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010027439 Metal poisoning Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 208000008127 lead poisoning Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003823 mortar mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005025 nuclear technology Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 150000003752 zinc compounds Chemical class 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/20—Disintegrating by grating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a preparation process for preparing radiation-proof mortar by using lead-zinc tailing sand, wherein the radiation-proof mortar comprises tailing sand fine aggregate, portland cement, styrene-butadiene emulsion, barite, EVA dispersed emulsion powder and water, the tailing sand fine aggregate is obtained by crushing, grinding and rinsing the lead-zinc tailing sand by processing equipment, a feed inlet is formed in the upper end of the processing equipment, a supporting leg is fixedly connected to the lower end of the processing equipment, a crushing mechanism, a grinding mechanism and a rinsing mechanism are sequentially arranged in the processing equipment from top to bottom, the tailing sand can be directly applied to preparation of the radiation-proof mortar after being processed by the processing equipment in multiple steps, the utilization rate of tailing sand resources can be improved, the pressure of land resource shortage and heavy metal pollution can be relieved, and the lead leaching rate of products produced by the process meets the safety standard.
Description
Technical Field
The invention relates to the technical field of tailing sand treatment, in particular to a preparation process for preparing radiation-proof mortar by using lead-zinc tailing sand.
Background
Since the 20 th century, the world nonferrous metal industry has leaped forward, the global production and consumption of nonferrous metals has increased substantially, and a continuously growing situation has been maintained. While the non-ferrous metal industry is rapidly developing, a large amount of tailing sand is also generated.
According to incomplete statistics, the discharge amount of tailings in the world year reaches 500 hundred million tons, wherein the discharge amount of metal tailings sand such as lead, zinc, iron and the like accounts for about 80 percent of the total amount, and lead and zinc compounds remained in the tailings, sulfur-containing substances in the tailings sand and other symbiotic minerals can cause serious pollution to soil and underground water in reservoir areas, particularly lead contained in the tailings sand can cause the reduction of the immunity of organisms due to lead poisoning, so the tailings sand can become a 'timing bomb' threatening the health of local residents.
Lead-zinc tailing sand contains a plurality of incompletely extracted minerals and various toxic substances, the occupied area of a tailing pond is large, the ecological environment is influenced, the altitude of the tailing pond is continuously increased along with the passage of time, the risk of dam break is faced, the flood prevention pressure is rapidly increased every year, and therefore the problem of recycling the tailing sand needs to be solved urgently;
the lead-zinc tailing sand is used for preparing the radiation-proof mortar, the tailing sand can be well utilized, and the usage amount of Chinese concrete is 17-18 hundred million m3About, if only 1% of premixed concrete aggregate is replaced by lead-zinc tailing sand, 3-4 hundred million gravels can be saved each yearThe consumed lead-zinc ore sand is equivalent to the volume of 4 first-class tailing ponds, the pollution and loss of the land of about 1 million hectares caused by stacking the lead-zinc ore tailings can be avoided, the lead-zinc ore sand is used for preparing the radiation-proof concrete, the utilization rate of ore tailings resources can be improved, the pressure of land resource shortage and heavy metal pollution can be relieved, and the radiation-proof mortar can be widely applied to hospitals, nuclear power stations and other places.
Disclosure of Invention
The invention aims to provide a preparation process for preparing radiation-proof mortar by using lead-zinc tailing sand, which aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process for preparing radiation-proof mortar by utilizing lead-zinc tailing sand comprises tailing sand fine aggregate, portland cement, styrene-butadiene emulsion, barite, EVA dispersed emulsion powder and water, wherein the tailing sand fine aggregate is obtained after being crushed, ground and rinsed by processing equipment, the upper end of the processing equipment is provided with a feed inlet, the lower end of the processing equipment is fixedly connected with a supporting leg, the processing equipment is internally provided with a crushing mechanism, a grinding mechanism and a rinsing mechanism from top to bottom in sequence, a vibratable screening plate is arranged between the crushing mechanism and the grinding mechanism and driven by a grinding motor, the upper side surface of the screening plate is an inclined surface, one end, close to the lowest point of the upper side surface of the screening plate, of the processing equipment is provided with a through hole, the outer side of the through hole is provided with a storage tank, and the storage tank is connected with a feeding belt through a base plate arranged on the storage tank, and a feeding frame is fixedly connected to the feeding belt, and the feeding belt is driven by a feeding motor.
Preferably, rubbing crusher constructs including two crushing axles, and two crushing epaxial all fixed a plurality of crushing teeth that have cup jointed, mutual interlock between a plurality of crushing teeth on two crushing axles, a plurality of sprue of fixedly connected with on the lateral wall of processing equipment, and the last side of sprue is the inclined plane, crushing axle is by crushing motor drive.
Preferably, the grinding mechanism comprises a fixing block and a moving block, the fixing block is fixedly connected inside the processing equipment, the moving block is slidably connected inside the processing equipment, a connecting rod is fixedly connected to the outer side face of the moving block, a first through groove formed in the side wall of the processing equipment extends to the inside of the protective frame, and the connecting rod is driven by a grinding motor installed inside the protective frame.
Preferably, the screening board is close to the one end of running through the mouth and rotates the inside of connecting at the processing equipment, and the other end fixedly connected with connecting axle of screening board, the connecting axle run through the groove through the second that has on the processing equipment and extend to the inside of protecting frame, be connected with the connecting rod between connecting axle and the connecting rod, and connecting rod and the epaxial eccentric wheel interconnect of grinding motor.
Preferably, a second-stage grinding mechanism is arranged below the grinding mechanism and comprises a collecting frame, the collecting frame is communicated with a grinding box through a pipeline, the grinding box is funnel-shaped, the upper end of the grinding box is communicated with the outside through a fixing pipe, a through hole is formed in the lower end of the grinding box, a plurality of interference rods are fixedly connected to the inner side surface of the grinding box, and the pipeline is connected with a fan through a connecting pipe.
Preferably, rinsing mechanism includes the frame, the inside of frame rotates to be connected with and holds the frame, and holds the frame by rinsing motor drive, it has the blow down tank to hold to open on the lateral wall of frame, the inside of blow down tank is equipped with the sprue, and is equipped with the discharge hole on the sprue, the sprue is by installing the solenoid valve drive on holding the frame, and holds the inside of frame and still be equipped with a plurality of stirring rakes, be equipped with bin outlet and a plurality of discharge pipe on the lateral wall of frame, the lateral wall of frame still has a plurality of pipelines of discharging through a plurality of leg joints.
Preferably, the parts by weight of the tailing sand fine aggregate, the portland cement, the styrene-butadiene emulsion, the barite, the EVA dispersed emulsion powder and the water are respectively 600, 315, 146, 196, 145 and 154.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the unqualified tailing sand is transported into the crushing mechanism again through the matching among the screening plate, the through hole and the feeding belt, so that the crushing effect is better, the next grinding work is facilitated, the secondary grinding of the tailing sand is realized through the matching between the grinding box and the interference rod, and the subsequent rinsing work is more facilitated.
Drawings
FIG. 1 is a schematic view of the overall structure of the processing apparatus of the present invention;
FIG. 2 is an exploded view of the processing apparatus of the present invention;
FIG. 3 is a schematic view of the internal structure of the protection frame according to the present invention;
FIG. 4 is a cross-sectional view of the grinding box of the present invention;
FIG. 5 is a schematic view of the connection of the piping and grinding box of the present invention;
FIG. 6 is a schematic structural diagram of an outer frame according to the present invention;
FIG. 7 is an exploded view of the containment and external frames of the present invention;
FIG. 8 is a schematic view of the connection of a drainage channel and a plug of the present invention;
FIG. 9 is a simplified diagram of the experimental principle of the radiation-proof mortar board of the present invention;
FIG. 10 is a schematic view showing the distribution of measurement points of the radiation-proof mortar board of the present invention.
In the figure: 1. processing equipment, 2, a feeding hole, 3, supporting legs, 4, a screening plate, 5, a through hole, 6, a storage groove, 7, a base plate, 8, a feeding belt, 9, a feeding frame, 10, a crushing tooth, 11, a block, 12, a crushing motor, 13, a fixed block, 14, a moving block, 15, a connecting rod, 16, a first through groove, 17, a protective frame, 18, a connecting shaft, 19, a second through groove, 20, a connecting rod, 21, a grinding motor, 22, an eccentric wheel, 23, a collecting frame, 24, a pipeline, 25, a grinding box, 26, a through hole, 27, a fixed pipe, 28, a connecting pipe, 29, a fan, 30, an outer frame, 31, a containing frame, 32, a discharge groove, 33, a block, 34, a discharge hole, 35, an electromagnetic valve, 36, a stirring paddle, 37, a discharge hole, 38, a discharge pipeline, 39, a supporting rod, 40, a crushing shaft, 41, a feeding motor, 42, an interference rod, 43 and a limiting block, 44. belt shaft, 45, gear, 46, grinding column, 47, mounting rod, 48, belt pulley, 49, driving belt, 50, stirring motor, 51, rinsing motor, 52, discharge pipe, 53 and support.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, the present invention provides a technical solution: the anti-radiation mortar comprises tailing sand fine aggregate, portland cement, styrene-butadiene emulsion, barite, EVA dispersed emulsion powder and water, wherein the tailing sand fine aggregate is obtained by crushing and grinding the lead-zinc tailing sand by processing equipment 1 and rinsing the lead-zinc tailing sand, and the tailing sand fine aggregate, the portland cement, the styrene-butadiene emulsion, the barite, the EVA dispersed emulsion powder and the water are respectively 600, 315, 146, 196, 145 and 154 in parts by weight.
The processing equipment 1 is provided with a feeding hole 2 at the upper end, a supporting leg 3 is fixedly connected at the lower end, a crushing mechanism, a grinding mechanism and a rinsing mechanism are sequentially arranged in the processing equipment 1 from top to bottom, tailing sand to be processed is crushed firstly after entering the processing equipment 1 from the feeding hole 2, then is ground, and is finally rinsed (rinsing comprises the steps of rinsing with clear water, acid washing, alkali washing and the like) to finish processing, the tailing sand at the moment can be directly used for preparing fine aggregate of mortar, a vibratable screening plate 4 is arranged between the crushing mechanism and the grinding mechanism, the screening plate 4 is driven by a grinding motor 21, the grinding motor 21 can drive the screening plate 4 to vibrate continuously, the screening plate 4 can screen out some tailing sand agglomerates with larger volume, the influence on the next grinding work is avoided, and the vibration can enable the screening work to be better, the upper side surface of the screening plate 4 is an inclined surface, one end of the processing equipment 1 close to the lowest point of the upper side surface of the screening plate 4 is provided with a through hole 5, tailing sand with the caking volume larger than the leak hole of the screening plate 4 can slide to the outside of the processing equipment 1 through the through hole 5 and enter the inside of a storage tank 6, the outer side of the through hole 5 is provided with the storage tank 6, the storage tank 6 is fixedly connected on the side wall of the processing equipment 1, a support rod is connected between the lower side surface of the storage tank and the processing equipment 1, the storage tank 6 is connected with a feeding belt 8 through a base plate 7 arranged on the storage tank 6, one end of the base plate 7 is fixedly connected with the side wall of the storage tank 6, the other end is fixedly connected with the side wall of the processing equipment 1, the total number of two base plates 7 is two, a plurality of belt shafts 44 are rotatably connected between the two base plates 7 and inside of the storage tank 6, the inner side, and the feeding belt 8 is fixedly connected with a feeding frame 9, the feeding frame 9 scoops up tailing sand agglomerates with improper granularity in the storage tank 6 along with the movement of the feeding belt 8 and transports the tailing sand agglomerates to the upper part of the feeding port 2, and then the tailing sand agglomerates are poured into the feeding port 2, the feeding belt 8 is connected with a limiting block 43 and a plurality of belt shafts 44 in an upward shape with downward left end so as to deflect and pour the tailing sand agglomerates to the inside as far as possible (as shown in fig. 2), a material receiving plate matched with the feeding frame 9 is fixedly connected to the processing equipment 1, the feeding frame 9 can better pour the tailing sand agglomerates in the feeding belt 8 into the processing equipment 1, the feeding belt 8 is driven by a feeding motor 41, one end of the belt shaft 44 in the storage tank 6 penetrates through the storage tank 6 and is fixedly connected with a motor shaft of the feeding motor 41, the feeding motor 41 is installed on the outer side wall of the storage tank 6 (the feeding plate 41 is installed on the installation plate, the mounting panel is connected on the lateral wall of stock chest 6, and is connected with the bracing piece between mounting panel and the stock chest 6).
Specifically, the crushing mechanism comprises two crushing shafts 40, the crushing shafts 40 are rotatably connected between the side walls of the two ends of the processing equipment 1, a plurality of crushing teeth 10 are fixedly sleeved on the two crushing shafts 40, the crushing teeth 10 on the two crushing shafts 40 are mutually occluded, the crushing teeth 10 on the two crushing shafts 40 can be continuously occluded when the two crushing shafts 40 simultaneously rotate inwards, so that tailing sand is crushed, tailing sand agglomerates are changed into particles, the subsequent grinding work is facilitated, a plurality of blocking blocks 11 are fixedly connected to the side walls of the processing equipment 1, the upper side surfaces of the blocking blocks 11 are inclined surfaces, the blocking blocks 11 can block gaps between the crushing teeth 10, the tailing sand agglomerates are prevented from falling from the gaps of the crushing teeth 10 without being crushed, and the tailing sand agglomerates falling onto the blocking blocks 11 can slide onto the crushing teeth 10 through the inclined surfaces, thereby being smashed, crushing axle 40 is driven by crushing motor 12, and the one end of two crushing axles 40 all runs through processing equipment 1 and fixedly connected with gear 45, and opens two gear 45 intermeshing, arbitrary gear 45 and crushing motor 12's motor shaft interconnect, and the outside of gear 45 and crushing motor 12 is equipped with fixed frame 53, and fixed frame 53 can protect gear 45 and crushing motor 12, and crushing motor 12 installs the inside at fixed frame 53.
Specifically, the grinding mechanism comprises a fixed block 13 and a moving block 14, the upper end surfaces of the fixed block 13 and the moving block 14 are inclined surfaces, the lowest points of the upper end surfaces of the fixed block 13 and the moving block 14 are located on one sides close to each other, tailing sand particles falling onto the fixed block 13 and the moving block 14 can slide down to the positions between the fixed block 13 and the moving block 14 to be ground, the fixed block 13 is fixedly connected inside the processing equipment 1, the moving block 14 is slidably connected inside the processing equipment 1, the inner side surfaces of the fixed block 13 and the moving block 14 are inclined surfaces, gaps are reserved between the inclined surfaces, grinding columns 46 are fixedly connected onto the inclined surfaces, the arrangement of the inclined surfaces can prolong the time of the tailing sand particles passing through the positions between the fixed block 13 and the moving block 14, the grinding time is prolonged, the arrangement of the inclined surfaces and the grinding columns 46 can enable the grinding effect to be better, and connecting rods, be equipped with two connecting rods 15 on the lateral surface of motion piece 14, can make motion piece 14 more stable motion, open the inside that has first through groove 16 and extend to protecting frame 17 on the lateral wall of processing equipment 1 through the outer end of connecting rod 15, protecting frame 17 fixed connection is on the side of processing equipment 1, and connecting rod 15 is driven by the grinding motor 21 of installing in protecting frame 17 inside, and grinding motor 21 rotates and can drive connecting rod 15 and slide from top to bottom in the inside of first through groove 16 to can make motion piece 14 up-and-down motion, thereby reach the grinding effect.
Specifically, one end of the screening plate 4 close to the through opening 5 is rotatably connected inside the processing equipment 1, two side faces of one end of the screening plate 4 close to the through opening 5 are fixedly connected with a fixed shaft, the fixed shaft is rotatably connected with the side wall of the processing equipment 1, the other end of the screening plate 4 is fixedly connected with a connecting shaft 18, the two connecting shafts 18 are shared in total, the connecting shaft 18 extends into the protective frame 17 through a second through groove 19 formed in the processing equipment 1, a connecting rod 20 is connected between the connecting shaft 18 and the connecting rod 15, the connecting rod 20 is in an "H" shape, four end points of the connecting rod 20 are respectively fixedly connected with the two connecting rods 15 and the two connecting shafts 18, the connecting rod 20 is connected with an eccentric wheel 22 on a motor shaft of a grinding motor 21, the eccentric wheel 22 is movably contacted with a cross rod of the connecting rod 20, the grinding motor 21 drives the eccentric wheel 22 to rotate, then, the screening plate 4 and the motion block 14 are moved to work, the protective frame 17 can protect the grinding motor 21 and the link 20, and the grinding motor 21 is installed inside the protective frame 17.
In order to improve the grinding effect, a secondary grinding mechanism is provided, specifically, the secondary grinding mechanism is provided below the grinding mechanism, the secondary grinding mechanism comprises a collecting frame 23, the collecting frame 23 is fixedly connected inside the processing equipment 1, the collecting frame 23 is funnel-shaped, the collecting frame 23 is communicated with a grinding box 25 through a pipeline 24, tailings sand ground by the moving block 14 and the fixing block 13 falls into the collecting frame 23 and then enters the pipeline 24 through the collecting frame 23, the pipeline 24 is tangential to the transverse direction of the inner cavity of the grinding box 25, the grinding box 25 is funnel-shaped, the upper end of the grinding box 25 is communicated with the outside through a fixing pipe 27, the place where the pipeline 24 is communicated with the grinding box 25 is positioned above the lower end of the fixing pipe 27, so that the tailings sand can be prevented from being discharged from the fixing pipe 27, the lower end of the grinding box is provided with a through hole 26, the fixing pipe 27 can be used for exhausting and discharging ash, because the ash content in the tailings is low in density and is discharged from the fixed pipe 27 along with a part of the air flow, the tailings are discharged from the through hole 26, a plurality of interference rods 42 are fixedly connected to the inner side surface of the grinding box 25, the pipe 24 is connected with the fan 29 through the connecting pipe 28, the fan 29 blows air through the inside of the pipe 24 of the connecting pipe 28, so that the tailings inside the pipe 24 are blown into the inside of the grinding box 25, the tailings are continuously descended in a spiral shape inside the grinding box 25 and then collide with each other under the action of the interference rods 42 to be ground and then discharged, and the discharged tailings fall into the inside of the rinsing mechanism through the lower end of the grinding box 25.
Specifically, the rinsing mechanism includes outer frame 30, and a plurality of branches 39 of downside fixedly connected with of outer frame 30, the inside of outer frame 30 is rotated and is connected with and holds frame 31, and holds frame 31 and is driven by rinsing motor 51, and rinsing motor 51 is installed in the below of outer frame 30, and its motor shaft runs through outer frame 30 and holds frame 31 fixed connection, and rinsing motor 51 rotates and can drive and hold frame 31 and rotate, it has discharge tank 32 to open on the lateral wall of holding frame 31, the inside of discharge tank 32 is equipped with sprue 33, and is equipped with discharge hole 34 on sprue 33, sprue 33 is driven by the solenoid valve 35 of installing on holding frame 31, and holds the inside of frame 31 and still is equipped with a plurality of stirring rake 36, and stirring rake 36 rotates to be connected on installation pole 47, and the both ends of installation pole 47 and the upper end side fixed connection that holds frame 31, and the upper end of stirring rake 36 runs through installation pole 47, and is connected with belt pulley 48, each mounting rod 47 is provided with two stirring paddles 36, each mounting rod 47 is provided with a stirring motor 50, a transmission belt 49 is connected between two belt pulleys 48 positioned on the same mounting rod 47, the stirring motor 50 is connected with the corresponding belt pulleys 48 through a driving belt, the side wall of the outer frame 30 is provided with a discharge hole 37 and a plurality of discharge pipelines 38, three discharge pipelines 38 are arranged in total, the three discharge pipelines 38 are respectively used for discharging water, acid liquor and alkali liquor, the discharge hole 37 is used for discharging tailing sand, the containing frame 31 rotates to enable the discharge hole 34 on the containing frame to align with different discharge pipelines 38 so as to discharge different rinsing liquids, when the discharge hole 34 aligns with the discharge hole 37, the electromagnetic valve 35 can pull up the block 33 to enable the tailing sand to be directly discharged through the discharge groove 32 and the discharge hole 37, the outer side of the discharge hole 37 is provided with an inclined table positioned on the outer frame 30, can make the better discharge of tailings sand, the lateral wall of frame 30 still is connected with a plurality of pipelines 52 of discharging through a plurality of supports 53, and support 53 fixed connection is on the lateral wall of frame 30, and the pipeline 52 of discharging and external rinsing liquid storage device interconnect, can discharge different rinsing liquids through the inside of the pipeline 52 case of discharging of difference holding frame 31 and carry out the rinsing, has three discharge pipeline 52 altogether, is used for discharging clear water, acidizing fluid and alkali lye respectively.
The lead-zinc tailing sand of a certain tailing pond is sampled, the processing equipment 1 is utilized to carry out crushing, grinding and rinsing treatment by adopting the process, and the treated fine aggregate of the tailing sand is characterized, so that the apparent density is 2730Kg/m3, the fineness modulus is 0.78, compared with the common sand, the fineness modulus is 2.8, the apparent density is 2554Kg/m3, the lead-zinc tailing sand belongs to extra fine sand, and the lead-zinc tailing sand is beneficial to the subsequent mortar mixing and molding.
In order to verify the performance of the radiation-proof mortar prepared from the tailing sand, 6 groups of radiation-proof mortar boards (the size of the mortar board is 150mm × 150mm × 25mm) are prepared, each group comprises 9 radiation-proof mortar boards, and the proportion of the 6 groups of radiation-proof mortar boards is shown in table 1:
table 1: proportioning meter for multi-group radiation-proof mortar board
The shielding performance of concrete is expressed by the absorption coefficient mu of the concrete to gamma rays, and the attenuation of the gamma rays in a medium is as follows: N-N0e-μd
In the formula: n is a radical of0Reading for ray initial pulse; n is the ray pulse reading after the test piece plate is placed; d is the thickness of the test piece plate; mu is gamma ray absorption coefficient in cm-1；
The method adopts a BH1326 type nuclear technology and a physical experiment platform, uses 137Cs (667KeV) as a gamma ray radiation source, and comprises a NaI (TI) detector and a multi-channel pulse amplitude analyzer;
in the experiment, the mortar board is arranged between the radioactive source and the detecting instrument (as shown in fig. 9), because the radioactive source is irradiated by a single point, in order to comprehensively reflect the shielding performance of the mortar board and simultaneously reduce errors, 9 test points (as shown in fig. 10) are taken on the surface of the mortar board for repeatability test, an average value is finally taken, then a second board is added to increase the thickness of the mortar board for the same test, the average value is calculated and is added to the 9 th board all the time, the pulse number is over 10000 for each group of measurement time, and the data obtained by the experiment are shown in table 2:
table 2: relationship between gamma-ray absorption coefficient mu and lead-zinc tailing sand mixing amount
It can be known from table 2 that compared with the common mortar, the shielding performance is obviously improved by replacing the common river sand with the lead-zinc tailing sand, and when the mixing amount of the lead-zinc tailing sand reaches 60%, 80% and 100%, the absorption coefficient of gamma rays is larger, which indicates that the shielding performance is better along with the increase of the mixing amount of the tailing sand.
According to GB 5085.3-2007 'identification standard of leaching toxicity', the leaching value of solid waste lead is below 5 mg/L, and the leaching values of lead under different lead-zinc tailing sand substitution rates are shown in Table 3:
table 3: leaching value of lead in radiation-proof mortar
As can be seen from the data in the table, the leaching value of lead in the sample at each substitution rate is below 5 mg/L, and the lead meets the safety standard.
According to the experimental results, the radiation-proof mortar prepared from the lead-zinc tailings has good radiation-proof performance, and the lead leaching value completely meets the safety standard, so that the conclusion that the radiation-proof mortar prepared from the lead-zinc tailings can completely replace mortar prepared from common river sand to be used as a building material can be drawn.
The working principle of the processing device 1 is as follows: putting tailing sand blocks to be treated into the processing equipment 1 through the feeding hole 2, then crushing the tailing sand by the crushing teeth 10, enabling the crushed tailing sand to fall on the screening plate 4, enabling tailing sand particles with larger volume to enter the storage tank 6, enabling the tailing sand particles to enter the main frame 1 again through the feeding belt 8 for secondary crushing, enabling the tailing sand particles with smaller volume to pass through the screening plate 4 and then be ground by the fixed block 13 and the moving block 14, enabling the grinded tailing sand to enter the grinding box 25 through the collecting frame 23 and the pipeline 24 for secondary grinding, enabling the grinded tailing sand to enter the containing frame 31 after secondary grinding, and then carrying out rinsing (rinsing includes acid washing, alkali washing and clear water rinsing, controlling different rinsing liquids to be discharged into the containing frame 31 through controlling different discharge pipes 52 so as to carry out different rinsing), the in-process of rinsing can communicate with each other with different discharge pipe 38 through control discharge hole 34 to discharge different rinsing liquids, can control after the rinsing is accomplished and hold frame 31 rotation time discharge hole 34 and bin outlet 37 and align, then start solenoid valve 35 and pull up sprue 33, make the tailings sand that the rinsing finishes discharge through discharge tank 32 and bin outlet 37, follow-up can adopt equipment commonly used to dry.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation process for preparing radiation-proof mortar by utilizing lead-zinc tailing sand is characterized by comprising the following steps of: the anti-radiation mortar comprises tailing sand fine aggregate, Portland cement, butylbenzene emulsion, barite, EVA dispersed emulsion powder and water, wherein the tailing sand fine aggregate is obtained by crushing and grinding lead-zinc tailing sand through processing equipment (1) and by rinsing treatment, the upper end of the processing equipment (1) is provided with a feed inlet (2), and the lower end of the processing equipment is fixedly connected with supporting legs (3), and the anti-radiation mortar is characterized in that: processing equipment (1) is inside from last to installing rubbing crusher structure, grinding mechanism and rinsing mechanism down in proper order, but rubbing crusher structure and grinding are equipped with screening board (4) that can vibrate between the mechanism, screening board (4) are driven by grinding motor (21), and the last side of screening board (4) is the inclined plane, and processing equipment (1) is close to the one end of side minimum on screening board (4) and opens and has run through mouth (5), the outside that runs through mouth (5) is equipped with stock chest (6), stock chest (6) are connected with material loading belt (8) through base plate (7) that is equipped with on it, and fixedly connected with material loading frame (9) on material loading belt (8), material loading belt (8) are driven by material loading motor (41).
2. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 1, is characterized in that: the crushing mechanism comprises two crushing shafts (40), a plurality of crushing teeth (10) are fixedly sleeved on the two crushing shafts (40), the crushing teeth (10) on the two crushing shafts (40) are mutually meshed, a plurality of blocks (11) are fixedly connected onto the side wall of the processing equipment (1), the upper side face of each block (11) is an inclined plane, and the crushing shafts (40) are driven by a crushing motor (12).
3. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 1, is characterized in that: grind mechanism includes fixed block (13) and motion piece (14), fixed block (13) fixed connection is in the inside of processing equipment (1), and motion piece (14) sliding connection is in the inside of processing equipment (1), and fixedly connected with connecting rod (15) on its lateral surface, open the inside that has first through groove (16) extend to protecting frame (17) on the outer end of connecting rod (15) through processing equipment (1) lateral wall, connecting rod (15) are by installing grinding motor (21) drive in protecting frame (17) inside.
4. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 3, is characterized in that: one end of the screening plate (4) close to the through hole (5) is rotatably connected in the processing equipment (1), the other end of the screening plate (4) is fixedly connected with a connecting shaft (18), the connecting shaft (18) extends to the inside of the protection frame (17) through a second through groove (19) formed in the processing equipment (1), a connecting rod (20) is connected between the connecting shaft (18) and the connecting rod (15), and the connecting rod (20) is connected with an eccentric wheel (22) on a motor shaft of the grinding motor (21).
5. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 1, is characterized in that: the grinding mechanism is characterized in that a secondary grinding mechanism is arranged below the grinding mechanism and comprises a collecting frame (23), the collecting frame (23) is communicated with a grinding box (25) through a pipeline (24), the grinding box (25) is funnel-shaped, the upper end of the grinding box (25) is communicated with the outside through a fixing pipe (27), a through hole (26) is formed in the lower end of the grinding box, a plurality of interference rods (42) are fixedly connected to the inner side face of the grinding box (25), and the pipeline (24) is connected with a fan (29) through a connecting pipe (28).
6. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 1, is characterized in that: rinsing mechanism includes frame (30), the internal rotation of frame (30) is connected with and holds frame (31), and holds frame (31) and be driven by rinsing motor (51), it has discharge tank (32) to hold to open on the lateral wall of frame (31), the inside of discharge tank (32) is equipped with sprue (33), and is equipped with discharge hole (34) on sprue (33), sprue (33) are by installing solenoid valve (35) drive on holding frame (31), and the inside that holds frame (31) still is equipped with a plurality of stirring paddles (36), be equipped with bin outlet (37) and a plurality of discharge pipe way (38) on the lateral wall of frame (30), the lateral wall of frame (30) still is connected with a plurality of pipelines (54) of discharging through a plurality of supports (53).
7. The preparation process for preparing the anti-radiation mortar by using the lead-zinc tailing sand, according to claim 1, is characterized in that: the weight parts of the tailing sand fine aggregate, the portland cement, the butylbenzene emulsion, the barite, the EVA dispersed emulsion powder and the water are respectively 600, 315, 146, 196, 145 and 154.
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| CN112876181A (en) * | 2021-03-17 | 2021-06-01 | 筑友智造科技投资有限公司 | Bonding mortar dry powder and bonding mortar |
| CN113461396A (en) * | 2020-11-26 | 2021-10-01 | 湖南中天青鼎工程科技股份有限公司 | Plastering mortar dry powder containing phosphogypsum and lead-zinc tailings and preparation method thereof |
| CN114130468A (en) * | 2021-11-24 | 2022-03-04 | 中旗(湖北)新材料有限公司 | Quartz grinding system for quartz precision finishing |
| CN115193710A (en) * | 2022-07-07 | 2022-10-18 | 济南莱米特金属制品有限公司 | Device and method for producing anti-radiation mortar by using tungsten tailing sand |
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