CN113321415B - Method for preparing glass sand from waste soil and tailings of urban building engineering - Google Patents
Method for preparing glass sand from waste soil and tailings of urban building engineering Download PDFInfo
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- CN113321415B CN113321415B CN202110723777.0A CN202110723777A CN113321415B CN 113321415 B CN113321415 B CN 113321415B CN 202110723777 A CN202110723777 A CN 202110723777A CN 113321415 B CN113321415 B CN 113321415B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B21/00—Severing glass sheets, tubes or rods while still plastic
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/02—Pretreated ingredients
- C03C1/022—Purification of silica sand or other minerals
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C19/00—Surface treatment of glass, not in the form of fibres or filaments, by mechanical means
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Abstract
According to the method for preparing the glass sand from the tailings of the residue soil of the urban building engineering, the quartz sand in the engineering residue soil can be extracted, and after a series of screening processes, quartz sand particles with high purity and low moderate degree can be obtained, and finally, the extracted high-quality quartz sand particles are used for preparing the glass sand, so that the obtained glass sand is high in quality, the processing process time is short, the efficiency is high, engineering waste materials are innovatively changed into engineering decoration materials, and the method is high in economy and practicability.
Description
Technical Field
The invention belongs to the technical field of urban building engineering, and particularly relates to a method for preparing glass sand from residue soil tailings of urban building engineering.
Background
With the rapid advance of urbanization, a large amount of construction waste soil is generated every day and mainly comes from mountains, basements and the like, the ground surfaces of the construction waste soil, such as south Fujian and Guangdong Zhanjiang, mainly consist of granite weathered or semi-weathered layers and surface clay layers, the iron content of the waste soil is high and mainly consists of granite and other clay layers, the main component of white granite is quartz and reaches 73% -77% in rocks, and the construction units generally use sand and stone for cement or backfill and the like, and most of the others are conveyed to absorption sites for landfill. The treatment mode does not achieve the purpose of green and environment-friendly comprehensive utilization of the waste soil tailings of the urban building engineering, and the waste soil tailings can be completely used for preparing high-purity quartz sand and applied to other industrial fields if deep processing is carried out on the waste soil tailings. In the field of building decoration, the decoration materials commonly used at present are ceramic chips, natural stone slabs, coatings and the like, and the defects of high raw material cost and joint seams on the decoration surface exist, so the method commonly used at present is to mix glass sand with water-soluble resin, epoxy resin or color-adjustable cement to coat the mixture on the wall, the floor or the decoration surface, so that the decoration surface has joints, no pollution is caused to the environment, and meanwhile, the decoration materials are flame-retardant, waterproof, five-toxic and long in service life. At present, no report is about the use of the slag and soil tailings of the urban building engineering to prepare the glass sand, and the use of the slag and soil tailings of the building engineering to prepare the glass sand can improve the utilization rate of the tailings, prepare the glass sand widely used in the decoration field and achieve the purpose of cross-field resource utilization. In the prior art, as in patent document 1, a method for preparing quartz sand for glass production by using kaolin tailings is disclosed, which mainly comprises the steps of slurry smashing and dispersing, grinding and centrifugal classification, magnetic separation and impurity removal, and dehydration and drying, wherein the steps are separated, although quartz sand meeting the standard can be obtained, the steps are complicated, the time for obtaining the quartz sand is long, and the purpose of efficiently and quickly obtaining the quartz sand cannot be achieved; for another example, patent document 2 provides a fluidized bed drying method for silica sand raw material for glass, which includes feeding silica sand to be dried into a fluidized bed dryer 5, introducing high temperature air into the bottom of the dryer, forming the silica sand in a fluidized state when hot air flows through the dryer, blowing the silica sand by the high temperature air flow to suspend in the air flow, feeding the dried silica sand into a vibration separation sieve 8, and performing the next process, wherein in the drying method, how the silica sand enters the vibration separation sieve 8 is not substituted, and the drying method can only perform drying, and if magnetic separation is performed to remove impurities, an additional process can be added to perform, so that the process for obtaining the silica sand is complicated; as another example, patent document 3 discloses a colorful glass sand for building decoration, which is produced by remelting waste glass to form glass, and then crushing the cooled glass to form glass sand, wherein the crushing operation is performed after cooling, which can save materials, and the process time for producing glass sand is long; finally, as patent document 4, it discloses a strong wind blowing ore type magnetite separating device, which blows iron ore by strong wind on the horizontally transported iron ore, and at the same time, an ultra-high magnetic coil is provided near the position where the iron ore is to be landed, so that magnetite sand and tailings can be separated by the strong magnetic force, and at the same time, in order to remove particles of unnecessary components and improve the ore sand grade, ultrasonic waves are used to bombard the magnetite sand, so that although the ore sand grade can be improved, the cost is increased due to the addition of ultrasonic waves intangible, and the ore sand is weighted due to horizontal blowing, so that the ore sand is easily influenced by gravity and falls downward at the position far from the tuyere, and thus, this arrangement can influence the screening precision of the magnetite sand and tailings, and the separation is insufficient.
[ patent document 1] CN103288331B;
[ patent document 2] CN100378423C;
[ patent document 3] CN1325411C;
[ patent document 4] CN105618260A.
In summary, in the prior art, the urban building engineering residue soil tailings are not used for preparing building decoration material glass sand, when the tailings are used for extracting quartz sand, the steps are complicated, the processes are more, the extraction efficiency is lower, magnetic separation and impurity removal cannot be simultaneously performed when the quartz sand is dried, the dried quartz sand can be collected at the bottom only after hot air is stopped being introduced, then the next process is performed, the process time is long, the quartz sand cannot be continuously dried, only one step is performed, in the step of manufacturing the glass sand from glass, crushing operation is performed after the glass is cooled, and the time cost for preparing the glass sand is also increased.
Disclosure of Invention
In order to overcome the defects of the existing method for preparing the glass sand, the invention provides a technical scheme, and a method for preparing the glass sand from the tailings of the urban building residue soil comprises the following steps:
1. obtaining residue soil tailings:
pouring the urban building residue soil into a stirring tank, adding a certain amount of water, mixing, stirring, standing for a period of time after uniform stirring until tailings are deposited at the bottom of the tank, and then using a filter screen to take out tailings with the diameter larger than 0.5mm to obtain residue soil tailings;
2. obtaining refined quartz sand:
1.1, drying and screening:
placing the slag soil tailings for a period of time, putting the slag soil tailings into an air drying chamber, and paving the slag soil tailings on an air hole plate at the bottom of the air drying chamber; hot air is introduced into the air inlet chamber and then blown into the air drying chamber through a plurality of air outlet holes arranged on the air outlet plate, the blowing force of the hot air is controlled to ensure that quartz sand with the diameter of 0.5-0.8mm and the particle size can be blown, and if a large stone with heavier weight is still on the air outlet plate, the pushing assembly is driven to move rightwards, meanwhile, a third sliding plate on the right side wall of the air drying chamber is opened, the large stone is pushed into the waste material receiving box, and then the third sliding plate is closed; continuously increasing the wind power to enable the quartz sand to impact a quartz sand screening and washing device on the screen to separate out impurity particles attached to the quartz sand; after a period of time, obtaining dry quartz sand particles;
1.2, cooling and magnetic separation:
the first sliding plate on the right side of the air drying chamber slides downwards to open the opening on the right side, meanwhile, the ultrahigh-magnetic electromagnetic coil on the right side of the air drying chamber is electrified, then cold air is driven to enter the air inlet chamber and blown out from the air outlet to blow up quartz sand particles, and due to the influence of magnetic force, magnetic particles such as contained iron ore particles and the like can move in a parabolic manner towards the direction of the ultrahigh-magnetic electromagnetic coil and fall into the waste material receiving box, so that the quartz sand can be cooled and simultaneously subjected to magnetic separation;
1.3 discharging:
after the cold air is introduced for a period of time, stopping blowing the cold air after the quartz sand is cooled, closing the first sliding plate, dropping the screened and cooled quartz sand onto an air hole plate, driving the quartz sand receiving box to align to an air drying chamber, enabling the third sliding plate to slide upwards, opening the air drying chamber, driving the material pushing assembly to slide rightwards, and pushing the carefully selected quartz sand into the quartz sand receiving box;
3. obtaining glass sand:
weighing glass ingredients: weighing quartz sand with a certain weight in the second step, and then weighing limestone, dolomite, soda ash, mirabilite, feldspar and carbon powder;
melting: then heating the glass ingredients in a tank furnace or a crucible furnace at high temperature;
and (3) cooling: clarifying and homogenizing the melted glass solution, guiding out the glass solution from the melting furnace through a flow guide groove to form a glass plate, then sending the glass plate into a glass slag collecting container, arranging a cooling liquid spraying opening in the container, and spraying cooling liquid when the glass plate is sent in so as to lead the glass plate with higher temperature to be cracked or even burst;
crushing: and crushing the crushed glass, carrying out acute angle treatment on the crushed glass particles, and screening.
Preferably, the mass fractions of the quartz sand, the limestone, the dolomite, the soda ash, the mirabilite, the feldspar and the carbon powder in the third step are as follows: 0.55, 0.05, 0.14, 0.19, 0.01, 0.0595, 0.0005;
preferably, the apparatus for obtaining refined quartz sand has a structure comprising: the air drying chamber, the air inlet chamber, the air hole plate, the feed hopper, the pushing component, the waste material receiving box, the quartz sand receiving box and the ultrahigh-magnetic-field coil, wherein the right side wall of the air drying chamber consists of a first sliding plate, a second sliding plate and a third sliding plate, the air inlet chamber is positioned at the lower part of the air drying chamber and is separated by the air hole plate, the air hole plate is provided with a plurality of uniformly distributed air outlet holes, the bottom of the air inlet chamber is used for introducing hot air or cold air, the feed hopper is fixedly arranged at the left side wall of the air drying chamber, a discharge hole is arranged at the contact part of the feed hopper and the left side wall, the pushing component is positioned at the lower side of the discharge hole, and it can be in the horizontal slip of air-dry indoor, push away the material subassembly and constitute by the last pushing ram piece that can independent motion and lower pushing ram piece, first slide, second slide and third slide all can independently slide from top to bottom, waste material receiving box and quartz sand material receiving box set up side by side and laminate the air inlet room right side wall and slide the setting, can laminate the air inlet room lateral wall and slide from beginning to end, the ultra-high magnetism electromagnetic coil sets up in the right side of air-dry room, and the position of high and first slide suits, the top of air-dry room is fixed and is provided with the toper section of thick bamboo, the toper section of thick bamboo upper end is connected with out the tuber pipe, it links to each other with the sack cleaner to go out the tuber pipe.
Preferably, the device also comprises fuel, an air mixing chamber, a cooling blower and a uniform pressure box, wherein the fuel is combusted, air is mixed in the air mixing chamber, then the air is introduced into the uniform pressure box, and finally hot air is introduced into the air inlet chamber, wherein the temperature of the hot air is as high as 400 ℃; and the cooling blower blows ambient air into the uniform pressure box, and finally the ambient air is introduced into the air inlet chamber to cool the quartz sand, and the temperature of the cooled quartz sand is lower than 60 ℃.
Preferably, a screen is further arranged at the connecting opening of the air drying chamber and the conical barrel, the screen is of a net structure with the diameter of a screen hole smaller than 0.5mm, a plurality of transverse openings which are arranged side by side are further arranged, and quartz sand screening and washing devices are arranged in the transverse openings.
Preferably, the quartz sand screening and washing device comprises an L-shaped plate, the left end of the L-shaped plate is rotatably connected onto the screen mesh through a hinge shaft, the right end of the L-shaped plate is further provided with a limiting clamping plate, a torsion spring is further arranged on the hinge shaft, and the L-shaped plate is clamped on the upper side of the screen mesh through the limiting clamping plate of the torsion spring.
Preferably, the upper material pushing block and the lower material pushing block of the material pushing assembly are respectively driven to slide through threaded rods, threaded holes are formed in the two ends of the upper material pushing block and the lower material pushing block, horizontal screws are arranged on the front wall and the rear wall of the air drying chamber, a driving motor is arranged at one end of each screw, and the horizontal screws are meshed with the threaded holes, so that the upper material pushing block and the lower material pushing block are driven to slide in the horizontal direction through rotation of the driving motor.
Preferably, the upper and lower pushers have the same length as the front and rear walls of the air-drying chamber 1, so that they can push the material on the air-vent plate out all the way while sliding.
Preferably, the waste material receiving box is fixedly connected with the quartz sand receiving box, and a power system capable of driving the waste material receiving box to slide back and forth is arranged.
Preferably, the electromagnetic device further comprises a controller, and the energization amount of the ultrahigh-magnetic electromagnetic coil can be controlled by the controller, so that the magnetic field intensity of the ultrahigh-magnetic electromagnetic coil can be adjusted.
Preferably, in order to enable the tailings entering from the feed hopper to smoothly enter the air drying chamber, a guide inclined plane is arranged on the upper side of the upper pushing block.
Preferably, the fuel is coal or natural gas.
The beneficial effects of the invention are as follows:
1) According to the method for preparing the glass sand by using the waste soil and tailings of the urban building engineering, the waste of the urban building engineering is converted into the decoration material of the building engineering according to the components of the waste soil and tailings of the building engineering, so that the aim of highly utilizing resources is fulfilled, and in the method, a plurality of complicated steps used in the step of extracting the quartz sand are innovatively combined, so that the time for advancing the quartz sand is shortened, the extraction efficiency is improved, and in the step of converting the glass into the glass sand, the steps of cooling the glass and crushing the glass are combined and superposed, so that the efficiency for preparing the glass sand is further improved;
2) Furthermore, in the method for preparing the glass sand by using the waste soil tailings of the urban building engineering, the step of drying the quartz sand and the step of magnetically separating and removing impurities are fused in the step of extracting the quartz sand from the tailings, so that the magnetically separating and removing impurities can be realized while the quartz sand is dried by using hot air, and the product after the magnetically separating and removing impurities is automatically separated from the quartz sand, so that the cost is saved, and the impurity removing process can be very quick and convenient;
3) Furthermore, according to the method for preparing the glass sand by using the waste soil and tailings of the urban building engineering, when the quartz sand and the magnetic impurities are in a suspended state by using hot air, after a period of time, the filtered and dried quartz sand is collected by the transverse quartz sand collecting device, so that the surface of the quartz sand for manufacturing glass is dry, and the purity of the quartz sand is high;
4) Furthermore, the method for preparing the glass sand by using the waste soil and tailings of the urban building engineering is innovatively different from the conventional technical process of magnetic filtration by using a filter screen, wherein a hot air blowing port and a magnetic separation impurity removal collection box are distributed side by side, so that when quartz sand and magnetic separation impurities are blown up along with hot air, magnetic particles move horizontally due to the influence of electromagnetic force, and are separated from a hot air blowing area;
5) Furthermore, according to the method for preparing the glass sand by using the slag soil tailings in the urban building engineering, the quartz sand is dried by using the air blown vertically upwards, the drying and magnetic separation steps are completed together by matching with the ultrahigh-magnetic electromagnetic coil, and meanwhile, the drying and cooling are performed in the same container, so that the quartz sand processing technology can be optimized, meanwhile, in consideration of the fact that particles of required components and particles of non-required components in the quartz sand can be bonded together, quartz sand grinding and washing equipment is also added into the equipment, and the bonded particles are separated by matching with strong air;
6) Furthermore, in the method for preparing the glass sand by using the waste soil and the tailings of the urban building engineering, the glass is cooled by directly pouring a cooling medium on the formed glass, so that the glass is cracked and automatically cracked into broken glass slag, and then the broken glass slag is put into crushing equipment to further prepare the glass sand.
Drawings
FIG. 1 is a flow chart of a method for preparing glass sand from the waste soil tailings of the urban building engineering;
FIG. 2 is the device for extracting quartz sand from the tailings of the residue soil in urban building engineering;
FIG. 3 is a top view of the screen of FIG. 2;
fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 3.
Description of the reference symbols
1. An air drying chamber; 2. an air inlet chamber; 3. a wind hole plate; 4. an air outlet; 5. a feed hopper; 6. a material pushing assembly; 7. a first slide plate; 8. a second slide plate; 9. a third slide plate; 10. a waste receiving box; 11. a quartz sand receiving box; 12. an ultra-high magnetic electromagnetic coil; 13. pushing up a material pushing block; 14. pushing the material block downwards; 15. a material guiding inclined plane; 16. a pressure equalizing box; 17. a fuel; 18. an air mixing chamber; 19. a cooling blower; 20. ambient air; 21. a screen mesh; 22. a transverse opening; 23. a quartz sand screening and washing device; 24. an L-shaped plate; 25. a hinge shaft; 26. a torsion spring; 27. a limiting clamping plate; 28. an air outlet pipe; 29. a conical cylinder.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
As shown in figure 1, the method for preparing the glass sand by using the urban building muck tailings comprises the following steps:
1. obtaining residue soil tailings:
pouring the urban building residue soil into a stirring tank, adding a certain amount of water, mixing, stirring, standing for a period of time after uniform stirring until tailings and the like are deposited at the bottom of the tank, and then using a filter screen to take out tailings with the diameter larger than 0.5mm to obtain residue soil tailings;
2. obtaining refined quartz sand:
1.1, drying and screening:
placing the residue soil tailings for a period of time, when the water content is below 10%, putting the residue soil tailings into the air drying chamber 1 through the feed hopper 5, sliding an upper pushing block 13 on the upper part of the pushing assembly 6 rightwards, paving the residue soil tailings on an air hole plate 3 at the bottom of the air drying chamber 1, moving to the right end of the air drying chamber 1, and returning to the initial position of the left end; hot air is introduced into the air inlet chamber 2 and then blown into the air drying chamber 1 through a plurality of air outlet holes 4 arranged on the air pore plate 3, so that the residue and tailings in the air pore plate 3 are blown up, the blowing force of the hot air is controlled to ensure that quartz sand with the diameter of 0.5-0.8mm can be blown up, and large stones and the like with heavy weight are still on the air pore plate 3, at the moment, the material pushing assembly 6 is driven to move rightwards, and meanwhile, a third sliding plate 9 on the right side wall of the air drying chamber 1 is opened, and the large stones and other impurities are pushed into the waste material receiving box 10; the wind power is continuously increased, so that the quartz sand can impact the quartz sand screening and washing device on the screen 21, and impurity particles attached to the quartz sand are separated out through the mechanical impact force; after a period of time, obtaining dry quartz sand particles;
1.2, cooling and magnetic separation:
the first sliding plate 7 on the right side of the air drying chamber 1 slides downwards to open the right opening, meanwhile, the ultrahigh-magnetic electromagnetic coil 12 on the right side of the air drying chamber 1 is electrified, then cold air is driven to enter the air inlet chamber 2, quartz sand particles are blown out from the air outlet and blown upwards, and due to the influence of magnetic force, the magnetic particles can move in a parabolic manner towards the ultrahigh-magnetic electromagnetic coil, so that the magnetic particles fall into the waste material receiving box 10, and the quartz sand can be cooled and simultaneously can be subjected to magnetic separation action;
1.3 discharging:
after the cold air is introduced for a period of time and the quartz sand is cooled, stopping blowing the cold air, closing the first sliding plate 7, dropping the screened and cooled quartz sand onto the air hole plate 3, driving the quartz sand receiving box 11 to align to the air drying chamber 1, enabling the third sliding plate 9 to slide upwards, opening the air drying chamber 1, and driving the material pushing assembly 6 to slide rightwards, so that the carefully selected quartz sand is pushed into the quartz sand receiving box 11;
3. obtaining glass sand:
weighing glass ingredients: weighing quartz sand with a certain weight in the second step, and then weighing limestone, dolomite, soda ash, mirabilite, feldspar and carbon powder with the mass fractions of 0.55, 0.05, 0.14, 0.19, 0.01, 0.0595 and 0.0005 respectively;
melting: then heating the glass batch in a tank furnace or a crucible furnace at high temperature, for example, 1550-1600 ℃;
and (3) cooling: after the melted glass solution is clarified and homogenized, the glass solution is led out from the melting furnace through a flow guide groove to form a glass plate, then the glass plate is sent into a glass slag collecting container, a cooling liquid (such as cooling water or cooling gas) spraying opening is arranged in the container, and when the glass plate is sent, the cooling liquid is sprayed, so that the glass plate with higher temperature is cracked or even burst;
crushing: crushing the broken glass, carrying out acute angle treatment (such as stirring treatment) on the crushed glass particles, and screening.
As shown in fig. 2 to 4, the apparatus for obtaining refined quartz sand has a structure comprising: the air drying chamber 1, the air inlet chamber 2, the air hole plate 3, the feed hopper 5, the material pushing assembly 6, the waste material receiving box 10, the quartz sand receiving box 11 and the ultrahigh-magnetic electromagnetic coil 12, wherein the right side wall of the air drying chamber 1 consists of a first sliding plate 7, a second sliding plate 8 and a third sliding plate 9, the air inlet chamber 2 is positioned at the lower part of the air drying chamber 1 and is separated by the air hole plate 3, a plurality of air outlet holes 4 which are uniformly distributed are formed in the air hole plate 3, the bottom of the air inlet chamber 2 is used for introducing hot air or cold air, the feed hopper 5 is fixedly arranged at the left side wall of the air drying chamber 1, a discharge hole is formed in the contact part with the left side wall, the material pushing assembly 6 is positioned at the lower side of the discharge hole, the waste material receiving box 10 and the quartz sand receiving box 11 are arranged in parallel and are arranged in a sliding manner to be attached to the right side wall of the air inlet chamber 2 and can slide back and forth to be attached to the side wall of the air inlet chamber 2, the ultrahigh-magnetic electromagnetic coil 12 is arranged on the right side of the air drying chamber 1 and is matched with the first sliding plate 7 in height, a conical barrel 29 is fixedly arranged at the top of the air drying chamber 1, the upper end of the conical barrel 29 is connected with an air outlet pipe 28, and the air outlet pipe 28 is connected with a bag-type dust collector.
Preferably, the air-conditioning system also comprises fuel 17, an air mixing chamber 18, a cooling blower 19 and a pressure equalizing box 16, wherein the fuel 17 is combusted, then air is mixed in the air mixing chamber 18, then the air is introduced into the pressure equalizing box 16, and finally hot air is introduced into the air inlet chamber 2, wherein the temperature of the hot air can reach 400 ℃; the cooling blower 19 blows ambient air 20 into the uniform pressure box 16, and finally the ambient air is introduced into the air inlet chamber 2 to cool the quartz sand, wherein the temperature of the cooled quartz sand is firstly lower than 60 ℃.
Preferably, a screen 21 is further arranged at the connecting opening of the air drying chamber 1 and the conical barrel 29, the screen 21 is a net structure with screen holes of which the diameter is smaller than 0.5mm, a plurality of transverse openings 22 are arranged side by side, quartz sand screening and washing devices 23 are arranged in the transverse openings 22, each quartz sand screening and washing device 23 comprises an L-shaped plate 24, the left end of each L-shaped plate 24 is rotatably connected to the screen 21 through a hinge shaft 25, a limiting clamping plate 27 is further arranged at the right end of each L-shaped plate 24, a torsion spring 26 is further arranged on each hinge shaft 25, and each L-shaped plate 24 is clamped on the upper side of the screen 21 through the torsion spring 26. The protruding structure that L type board 24 formed cooperates the strong wind for it can be with the bonding granule screen off on the quartz sand surface that blows up, simultaneously, because it sets up on the screen cloth through the activity of torsional spring 26, consequently, also can not produce very strong striking to quartz sand. Simultaneously, in order to make a plurality of L templates 24 can cooperate the action, use the rope to couple together each spacing cardboard 27 to make each quartz sand sieve wash and link between the device 23, sieve and wash the effect better.
Preferably, the upper pushing block 13 and the lower pushing block 14 of the pushing assembly 6 are respectively driven to slide by a threaded rod, for example, threaded holes are formed at both ends of the upper pushing block 13 and the lower pushing block 14, then horizontal screws are arranged on the front wall and the rear wall of the air drying chamber 1, a driving motor is arranged at one end of each screw, and the horizontal screws are engaged with the threaded holes, so that the upper pushing block 13 and the lower pushing block 14 are driven to slide in the horizontal direction by the rotation of the driving motor. Preferably, other driving means, such as rack and pinion and hydraulic cylinder structure, can be adopted to realize the horizontal sliding of the upper and lower push blocks 13 and 14. Preferably, the upper and lower pushers 13 and 14 have the same length as the front and rear walls of the air drying chamber 1, so that they can push the material on the air hole plate 3 out in its entirety when sliding.
Preferably, the first sliding plate 7, the second sliding plate 8 and the third sliding plate 9 are arranged in sequence from top to bottom, and the first sliding plate 7, the second sliding plate 8 and the third sliding plate 9 respectively slide up and down through independent driving mechanisms, such as a hydraulic cylinder, a motor-driven screw and a gear-rack transmission mechanism.
Preferably, the waste material receiving box 10 is fixedly connected with the quartz sand receiving box 11, and is provided with a telescopic cylinder structure, a screw driving structure, a gear rack structure and the like capable of driving the waste material receiving box to slide back and forth.
Preferably, the screen 21 is slidably disposed on the upper side of the air drying chamber 1, and the screen is slidably moved by a telescopic cylinder structure, a screw driving structure, a rack and pinion structure, or the like.
Preferably, a controller is further included, and the amount of energization of the ultra-high-magnetic electromagnetic coil 12 is controllable by the controller so as to be able to adjust the magnetic field strength thereof, which may preferably fall within a range between 1 tesla and 10 tesla.
Preferably, in order to make the tailings entering from the feeding hopper 5 smoothly enter into the air drying chamber 1, the upper side of the upper pusher block 13 is provided with a guide slope 15.
Preferably, the fuel 17 is coal or natural gas.
The process for preparing the glass sand by the tailings comprises the following steps: firstly extracting quartz sand from the tailings, then changing the extracted quartz sand into glass sand, and extracting high-purity quartz sand by the following steps: engineering slag and soil tailings are added from a feed hopper 5, the engineering slag and soil tailings fall onto an air hole plate 3 through a guide inclined plane, then an upper material pushing block 13 is driven to slide rightwards to flatten the engineering slag and soil tailings, then fuel 17 is ignited, hot air is introduced into an air inlet chamber 2, strong wind is blown in through an air outlet hole 4, then sand with the size of quartz sand is blown up, heavy objects such as large stones are left on the air hole plate 3, after the strong wind is introduced for a period of time, the lower material pushing block 14 is driven to slide rightwards to push the heavy objects such as large stones rightwards, then a third sliding plate 9 is opened, so that the heavy objects such as large stones are pushed into a waste material receiving box 10, then the third sliding plate 9 is closed, simultaneously wind power is increased, so that the quartz sand can be blown onto a screen 21, a quartz sand screening device 23 impacting the screen 21 washes off attached particles, after the washing time, the introduction of the hot wind is stopped, the quartz sand falls onto the air hole plate 3, then the upper material pushing block 13 is driven to slide rightwards, the quartz sand is paved, the ultrahigh-magnetic electromagnetic coil 12 is electrified, the first sliding plate 7 is opened, the cooling blower 19 is started, cold air is blown into the air inlet chamber 2, particles such as the quartz sand and the like are blown by wind power to move vertically upwards, iron-containing particles and the like form parabolic motion moving rightwards due to the influence of the magnetic force of the ultrahigh-magnetic electromagnetic coil 12, then the iron-containing particles fall into the waste material receiving box 10 through the outlet opened by the first sliding plate 7, so that a magnetic separation process can be realized while cooling, after a period of time, the first sliding plate 7, the ultrahigh-magnetic electromagnetic coil 12 and the cooling blower 19 are closed, after the quartz sand falls onto the air hole plate 3, the quartz sand receiving box 11 is driven to move forwards to be opposite to the air inlet chamber 2, the third sliding plate 9 is opened, the pushing assembly 6 is driven to slide rightwards, so that the screened and dried quartz sand is pushed into the quartz sand receiving box 11, and the screening and drying process of the quartz sand is completed. Preferably, when the quartz sand is magnetically separated, after the quartz sand is paved, the pushing assembly 6 can be driven to move rightwards to the middle position of the air drying chamber 1, so that the quartz sand to be magnetically separated and dried is located at a position close to the ultrahigh-magnetic electromagnetic coil, and the magnetic separation is more convenient. The quartz sand processed by the method has less magnetic substances and higher purity, and ensures the quality of the subsequently manufactured glass, thereby ensuring the quality of the obtained glass sand.
In conclusion, in the method for preparing the glass sand from the tailings of the slag soil of the urban building engineering, the quartz sand in the engineering slag soil can be extracted, and after a series of screening processes, quartz sand particles with high purity and low moderate degree can be obtained, and finally, the extracted high-quality quartz sand particles are used for preparing the glass sand, so that the obtained glass sand has high quality, and meanwhile, the processing process has short time and high efficiency, engineering waste materials are innovatively changed into engineering decoration materials, and the method has high economical efficiency and practicability.
Claims (7)
1. A method for preparing glass sand from urban building residue soil tailings is characterized by comprising the following steps:
1. obtaining slag soil tailings:
pouring the urban building residue soil into a stirring tank, adding a certain amount of water for mixing, stirring, standing for a period of time after uniform stirring until tailings are deposited at the bottom of the tank, and then fishing out tailings with the diameter larger than 0.5mm by using a filter screen to obtain residue soil tailings;
2. obtaining refined quartz sand:
1.1, drying and screening:
placing the slag soil tailings for a period of time, putting the slag soil tailings into an air drying chamber (1), and paving the slag soil tailings on an air hole plate (3) at the bottom of the air drying chamber (1); hot air is introduced into the air inlet chamber (2), and then blown into the air drying chamber (1) through a plurality of air outlet holes (4) arranged on the air hole plate (3), the blowing force of the hot air is controlled to ensure that quartz sand with the diameter of 0.5-0.8mm can be blown up, and large stones with heavier weight are still on the air hole plate (3), the material pushing assembly (6) is driven to move rightwards, meanwhile, a third sliding plate (9) on the right side wall of the air drying chamber (1) is opened, the large stones are pushed into the waste material receiving box (10), and then the third sliding plate (9) is closed; wind power is continuously increased, so that the quartz sand can impact a quartz sand screening and washing device on the screen (21) to separate out impurity particles attached to the quartz sand; after a period of time, obtaining dry quartz sand particles;
1.2, cooling and magnetic separation:
the method comprises the following steps that a first sliding plate (7) on the right side of an air drying chamber (1) slides downwards to open a right-side opening, an ultrahigh-magnetic electromagnetic coil (12) on the right side of the air drying chamber (1) is electrified, then cold air is driven to enter an air inlet chamber (2), quartz sand particles are blown upwards from an air outlet, and due to the influence of magnetic force, the magnetic particles move in a parabolic manner towards the ultrahigh-magnetic electromagnetic coil and fall into a waste material receiving box (10), so that the quartz sand can be cooled, and magnetic separation can be carried out;
1.3 Discharging:
after the cold air is introduced for a period of time, after the quartz sand is cooled, stopping blowing the cold air, closing the first sliding plate (7), dropping the screened and cooled quartz sand onto the air hole plate (3), then driving the quartz sand receiving box (11) to align to the air drying chamber (1), enabling the third sliding plate (9) to slide upwards, opening the air drying chamber (1), driving the material pushing assembly (6) to slide rightwards, and pushing the carefully selected quartz sand into the quartz sand receiving box (11);
3. obtaining glass sand:
weighing glass ingredients: weighing a certain weight of the quartz sand carefully selected in the step two, and then weighing limestone, dolomite, soda ash, mirabilite, feldspar and carbon powder;
melting: then heating the glass batch in a tank furnace or a crucible furnace at high temperature;
and (3) cooling: clarifying and homogenizing the melted glass solution, guiding out the glass solution from the melting furnace through a flow guide groove to form a glass plate, then sending the glass plate into a glass slag collecting container, arranging a cooling liquid spraying opening in the container, and spraying cooling liquid when the glass plate is sent in to enable the glass plate with higher temperature to be cracked;
crushing: crushing the cracked glass, carrying out acute angle treatment on crushed glass particles, and screening to obtain glass sand;
the equipment structure for obtaining the refined quartz sand comprises: the waste material drying chamber comprises an air drying chamber (1), an air inlet chamber (2), an air hole plate (3), a feed hopper (5), a material pushing assembly (6), a waste material receiving box (10), a quartz sand receiving box (11) and an ultrahigh magnetic electromagnetic coil (12), wherein the right side wall of the air drying chamber (1) consists of a first sliding plate (7), a second sliding plate (8) and a third sliding plate (9), the air inlet chamber (2) is positioned at the lower part of the air drying chamber (1) and is separated by the air hole plate (3), the air hole plate (3) is provided with a plurality of uniformly distributed air outlet holes (4), the bottom of the air inlet chamber (2) is used for introducing hot air or cold air, the feed hopper (5) is fixedly arranged at the left side wall of the air drying chamber (1), a discharge hole is arranged at the contact part of the left side wall, the material pushing assembly (6) is positioned at the lower side of the discharge hole and can horizontally slide in the air drying chamber (1), the material pushing assembly (6) is composed of an upper material pushing block (13) and a lower material pushing block (14) which can independently move, the first sliding plate (7), the second sliding plate (8) and the second sliding plate (9) and the right magnetic electromagnetic coil (9) are arranged in parallel to the front and back of the air drying chamber, the quartz sand receiving box (1), and back of the quartz sand receiving box (11), the height of the air drying chamber (1) is matched with that of the first sliding plate (7), a conical cylinder (29) is fixedly arranged at the top of the air drying chamber (1), the upper end of the conical cylinder (29) is connected with an air outlet pipe (28), and the air outlet pipe (28) is connected with a bag-type dust collector; a screen (21) is further arranged at a connecting opening of the air drying chamber (1) and the conical barrel (29), the screen (21) is of a net structure with the mesh diameter smaller than 0.5mm, a plurality of transverse openings (22) which are arranged side by side are further arranged, and quartz sand screening and washing devices (23) are arranged in the transverse openings (22); quartz sand sieve washes device (23) and includes L template (24), and the left end of L template (24) is rotated through hinge (25) and is connected on screen cloth (21), and the right-hand member of L template (24) still is provided with spacing cardboard (27), still is provided with torsional spring (26) on hinge (25), and L template (24) make its spacing cardboard (27) card locate screen cloth (21) upside through torsional spring (26).
2. The method for preparing the glass sand by using the urban building residue soil tailings as claimed in claim 1, wherein the method comprises the following steps: the quartz sand, the limestone, the dolomite, the soda ash, the mirabilite, the feldspar and the carbon powder in the third step have the following mass fractions: 0.55, 0.05, 0.14, 0.19, 0.01, 0.0595, 0.0005.
3. The method for preparing the glass sand from the urban building residue soil tailings as claimed in claim 1, wherein the method comprises the following steps: the air-conditioning system also comprises fuel (17), an air mixing chamber (18), a cooling blower (19) and a pressure equalizing box (16), wherein the fuel (17) is combusted, air is mixed in the air mixing chamber (18), then the air is introduced into the pressure equalizing box (16), and finally hot air is introduced into the air inlet chamber (2), wherein the temperature of the hot air is up to 400 ℃; the cooling blower (19) blows ambient air (20) into the uniform pressure box (16), and finally the ambient air is also introduced into the air inlet chamber (2) to cool the quartz sand, and the temperature of the cooled quartz sand is lower than 60 ℃.
4. The method for preparing the glass sand from the urban building residue soil tailings as claimed in claim 1, wherein the method comprises the following steps: the upper material pushing block (13) and the lower material pushing block (14) of the material pushing assembly (6) are driven to slide through threaded rods respectively, threaded holes are formed in the two ends of the upper material pushing block (13) and the lower material pushing block (14), horizontal screws are arranged on the front wall and the rear wall of the air drying chamber (1), a driving motor is arranged at one end of each horizontal screw, the horizontal screws are meshed with the threaded holes, and the upper material pushing block (13) and the lower material pushing block (14) are driven to slide in the horizontal direction through rotation of the driving motor.
5. The method for preparing the glass sand from the urban building residue soil tailings as claimed in claim 4, wherein the method comprises the following steps: the lengths of the upper material pushing block (13) and the lower material pushing block (14) are the same as the distance between the front wall and the rear wall of the air drying chamber (1), so that the upper material pushing block (13) and the lower material pushing block (14) can push all the materials on the air hole plate (3) when sliding.
6. The method for preparing the glass sand by using the urban building residue soil tailings as claimed in claim 1, wherein the method comprises the following steps: the waste material receiving box (10) is fixedly connected with the quartz sand receiving box (11), and a power system capable of driving the waste material receiving box (10) to slide back and forth is arranged.
7. The method for preparing the glass sand from the urban building residue soil tailings as claimed in claim 1, wherein the method comprises the following steps: the electromagnetic valve also comprises a controller, and the current quantity of the ultrahigh-magnetic electromagnetic coil (12) can be controlled by the controller, so that the magnetic field intensity of the ultrahigh-magnetic electromagnetic coil (12) can be adjusted.
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| EP0124493A2 (en) * | 1983-05-03 | 1984-11-07 | Italsil S.p.A. | Apparatus for the purification of siliceous sand by means of attrition |
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| CN210154191U (en) * | 2019-06-17 | 2020-03-17 | 新沂市创科石英有限公司 | Quartz sand drying device |
| CN210159780U (en) * | 2019-06-21 | 2020-03-20 | 东海县华科环保科技有限公司 | Quartz sand raw material picking workbench |
| CN210160035U (en) * | 2019-05-26 | 2020-03-20 | 连云港强邦石英制品有限公司 | High-purity quartz sand preparation is with wasing edulcoration device |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0124493A2 (en) * | 1983-05-03 | 1984-11-07 | Italsil S.p.A. | Apparatus for the purification of siliceous sand by means of attrition |
| CN103288331A (en) * | 2013-05-21 | 2013-09-11 | 华南理工大学 | Method for using kaolin tailings for preparing quartz sand for glass production |
| CN107935383A (en) * | 2017-12-25 | 2018-04-20 | 阜阳市远大浮法玻璃制品有限公司 | A kind of building glass and its production technology |
| CN210160035U (en) * | 2019-05-26 | 2020-03-20 | 连云港强邦石英制品有限公司 | High-purity quartz sand preparation is with wasing edulcoration device |
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