CN211514818U - Machine-made sand tailing grinding treatment system - Google Patents

Abstract

The utility model belongs to the technical field of highway engineering material processing, a mechanism sand tails abrasive treatment system is specifically disclosed. The machine-made sand tailing grinding treatment system comprises a first hoister, a first sorting machine, a flour mill, a collector and a storage device which are sequentially connected, wherein the flour mill comprises a second sorting machine and a grinding machine arranged below the second sorting machine, the grinding machine comprises an inner tube, an outer tube and a grinding chamber, the inner tube is sleeved inside the outer tube, and a buffer chamber is arranged inside the inner tube; a stone powder partition plate is arranged in the buffer chamber, the fixed end of the stone powder partition plate is connected with the inner cylinder, and the free end of the stone powder partition plate faces the grinding chamber. This mechanism sand tails grinds processing system has avoided qualified mechanism sand tails to get into the milling machine once more in process of production, reduces the equipment loss to set up the mountain flour baffle in the machine that grinds, can form the material layer with unqualified mountain flour rapidly, improve grinding efficiency greatly.

Description

A system for grinding and processing machine-made sand tailings

【Technical field】

The utility model relates to the technical field of highway engineering material processing, in particular to a system for grinding and processing machine-made sand tailings.

【Background technique】

Natural sand is a non-renewable local resource. With the increasing scale of national capital construction and the gradual strengthening of environmental protection measures for farmland and river channels, the use of natural sand resources is limited. Decades of over-exploitation of natural sand has brought devastating damage to the river, seriously affecting the stability of the riverbed and the safety of flood control. At present, natural sand resources have been greatly reduced and are close to depletion. The contradiction between supply and demand of concrete sand is particularly prominent. According to incomplete statistics, the use of machine-made sand in concrete is gradually increasing. Since 2008, the amount of sand and gravel in my country has increased year by year. The total amount of sand and gravel aggregate has exceeded 20 billion tons, and the proportion of machine-made sand in the total amount of sand and stone has also increased year by year. , the amount of manufactured sand exceeds 18 billion tons, accounting for nearly 90%. It is expected that after 3-5 years, the artificial sand will completely replace the natural sand.

The production process of machine-made sand inevitably produces a large amount of tailings. At present, the productivity of sand making equipment is between 15% and 35%, and no less than 4 billion tons of tailings will be produced nationwide every year. Subgrade backfilling, cement mixing and other methods can only consume about 50%, and landfilling is still the most important treatment method, which seriously affects the ecological restoration of cultivated land and forest land.

In order to solve the environmental pollution problem of limestone manufactured sand tailings, the researchers grinded the limestone manufactured sand tailings to form limestone powder that meets the requirements of "Limestone Powder for Cement, Mortar and Concrete" GB/T 35164-2017. The water content of machine-made sand tailings needs to be strictly controlled during grinding. If the water content is higher than 1.5%, the grinding efficiency will be reduced, and at the same time, caking phenomenon will occur and eventually the storage will be blocked. Usually in the range of 0.5-3%, so the existing production line is difficult to meet the production demand. Machine-made sand tailings also have the characteristics of small particles (the mass ratio of ≤45μm is greater than 50%). When ordinary ball mills and Raymond mills are grinding, the strong wind and negative pressure in the closed chamber make a large number of particles suspended, which greatly reduces the size of the particles. Obstructing the sorting channel, resulting in reduced work efficiency, increased energy consumption, and loss of control of grinding quality.

For example, Chinese invention patent application CN 108816483A discloses an artificial sand production system, which includes a vibrating feeder, a coarse crusher, a fine crusher, a main sand making machine and a pneumatic powder separation device. The artificial sand production system optimizes the production process, the materials are treated in different ways, and then the materials that meet the particle size requirements are gradually screened out by grading and screening the materials, so as to prevent the qualified materials from being repeatedly crushed and ground. energy consumption, but the production system does not perform screening work before the first grinding to screen out the initially qualified tailings, so that all raw materials are coarsely crushed and finely crushed and then start to be classified and screened, increasing the The loss of the coarse crusher and the fine crusher is reduced, and the production system does not solve the problem of a large number of suspended particles in the warehouse during the material crushing process, which hinders the operation of the equipment, further reducing the work efficiency and increasing the energy consumption.

【Content of utility model】

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a system for grinding and processing machine-made sand tailings, which prevents qualified machine-made sand tailings from entering the pulverizer again during the production process. , reduce equipment loss, and set stone powder separator in the grinding machine, which can quickly form unqualified stone powder into material layer, greatly improve grinding efficiency; this processing system will improve stone powder grinding work efficiency by more than 50%, and greatly reduce energy consumption and production cost.

In order to achieve the above object, the technical scheme adopted by the present utility model is:

A system for grinding and processing machine-made sand tailings, the system comprises a first elevator, a first sorter, a pulverizer, a collector and a storage which are connected in sequence; the pulverizer comprises a second sorter and A grinder arranged under the second separator, the grinder includes an inner cylinder, an outer cylinder and a grinding chamber, the inner cylinder is sleeved inside the outer cylinder, and the interior of the inner cylinder is a buffer chamber, so the The inner cylinder and the outer cylinder are surrounded to form a powder suction channel, the upper port of the powder suction channel and the upper port of the buffer chamber are both communicated with the second sorter, and the lower port of the powder suction channel is connected to the second separator. The lower ports of the buffer chamber are all communicated with the grinding chamber, and the grinding chamber is provided with a grinding roller for grinding powder; the buffer chamber is provided with a stone powder partition, and the fixed end of the stone powder partition is connected to the inner cylinders are connected, and the free end of the stone powder partition plate faces the grinding chamber, the stone powder partition plate divides the buffer chamber into an upper cavity and a lower cavity, and the upper cavity and the lower cavity are communicated through an opening, The area of the opening is 1/3-3/4 of the cross-sectional area of the buffer chamber.

Further, the grinding roller is arranged on the bottom surface of the grinding chamber and is located directly below the buffer chamber; the inner cylinder is connected with the inner wall of the outer cylinder through a connecting rod.

Further, the first elevator and the first sorter are connected by a first screw conveyor, the first sorter and the pulverizer are connected by a second screw conveyor, the first The sorting machine and the collector are connected through a first communication pipe, the pulverizer and the collector are connected through a second communication pipe, and the collector and the storage are connected through a third screw conveyor; The first screw conveyor, the second screw conveyor, the first communication pipe, the second communication pipe, and the third screw conveyor are used for conveying machine-made sand tailings particles.

Further, the third spiral conveying pipe is connected to the storage device through a dust removal device and a second elevator in sequence.

Further, the stone powder separator is hollow truncated, the large-diameter end edge of the hollow truncated stone powder separator is connected with the inner wall of the inner cylinder, and the small-diameter end of the hollow truncated stone powder separator faces the grinding. room.

Further, the plane on which the stone powder separator is located forms an included angle of 55-75° with the inner wall of the inner cylinder.

Further, the cross-sectional area of the small diameter end of the hollow frustum-shaped stone powder separator is 1/2 of the cross-sectional area of the buffer chamber.

Further, the outer diameter of the inner cylinder is 100 cm, and the inner diameter of the outer cylinder is 120-140 cm.

Due to the use of the technical solution of the present utility model, the present utility model at least has the following beneficial effects:

(1) The machine-made sand tailings grinding processing system of the present utility model adopts "first selection and then grinding" combined with "grinding and sorting semi-isolation". The first sorting machine is used for sorting, and the qualified machine-made sand tailings are directly sent to the collector through the first connecting pipe, and the unqualified machine-made sand tailings are sent to the pulverizer through the first screw conveyor to avoid qualified products. The machine-made sand tailings enter the mill again, reducing equipment loss and greatly improving work efficiency; the "grinding and sorting semi-isolation" technology is to set a stone powder partition inside the mill to effectively block unqualified fine particles suspended in the mill. In the buffer chamber, the grinding material layer is quickly formed, which greatly improves the grinding efficiency. With the combination of the two technologies, not only can the grinding efficiency of stone powder be increased by more than 50%, but also energy consumption and production costs can be greatly reduced, and the quality of finished products can be improved.

(2) The utility model aims at the fine particles of the machine-made sand tailings. After entering the grinding machine, under the action of the negative pressure in the warehouse, the fine particles are suspended in the entire warehouse of the grinding machine, and it is difficult to enter the grinding room for effective grinding by the grinding rollers, reducing the For the problem of work efficiency, a stone powder partition is set up in the grinding machine, and the interior of the grinding machine is partially separated to avoid the phenomenon of a large number of fine particles suspending under the action of upward suction, so that the fine particles can quickly enter the grinding chamber to complete the grinding. , to improve the work efficiency; but after adding the stone powder partition, the suction of the ground powder is limited, and it is impossible to effectively enter the second sorting machine from the buffer chamber for sorting. Therefore, the utility model solves this problem, There is a powder suction channel surrounded by an inner cylinder and an outer cylinder in the grinder. In this way, under the action of negative pressure, the crushed machine-made sand tailings are effectively sucked and sorted through the double channel formed by the combination of the powder suction channel and the buffer chamber. machine for sorting.

【Description of drawings】

FIG. 1 is a schematic structural diagram of the system for grinding and processing machine-made sand tailings according to the present invention.

FIG. 2 is a schematic structural diagram of the grinding machine in FIG. 1 .

3 is a process flow diagram of the system for grinding and processing machine-made sand tailings of the present invention.

The main component symbols are explained as follows:

In the figure, 1-first elevator, 2-first sorter, 3-pulverizer, 3-1-second sorter, 3-1-1 classifier, 3-2-grinder, 3 -2-1-inner cylinder, 3-2-1-1 stone powder partition, 3-2-1-2-buffer chamber, 3-2-1-2-1-upper cavity, 3-2-1-2 -2-lower chamber, 3-2-2 outer cylinder, 3-2-3 grinding chamber, 3-2-3-1 grinding roller, 3-2-4-connecting rod, 3-3-powder suction channel, 4 - Collector, 5- Storage, 6- First Screw Conveyor, 7- Second Screw Conveyor, 8- Third Screw Conveyor, 9- First Connecting Pipe, 10- Second Connecting Pipe, 11- Dust Removal Device, 12 - Second Hoist.

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

【Detailed ways】

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

As shown in Figure 1, in a preferred embodiment of the present invention, the machine-made sand tailings grinding and processing system includes a first elevator 1, a first screw conveyor 6, a first sorter 2, a second Screw conveyor 7, pulverizer 3, collector 4, third screw conveyor 8, dust removal device 11, second elevator 12 and storage 5; the first elevator 1 and the first sorter 2 is connected by the first screw conveyor 6; the first sorter 2 is connected with the pulverizer 3 by the second screw conveyor 7, and the first sorter 2 is connected with the collection The filter 4 is connected through the first communication pipe 9, the pulverizer 3 and the collector 4 are connected through the second communication pipe 10, and the collector 4 and the storage 5 are connected through the third communication pipe 10. The screw conveyor 8 is connected.

The first elevator 1 is used to lift the machine-made sand tailings to a certain height, so that the machine-made sand tailings enter the first sorting machine 2 from the top to the bottom from the first screw conveyor 6, and the machine-made sand tailings are selected from the top. The purpose of feeding in the following way is to stabilize the amount of machine-made sand tailings entering the first sorting machine 2 and avoid the phenomenon of segmented materials; the first sorting machine 2 is used to separate qualified machine-made sand tailings from the raw materials. The material is selected, and the qualified machine-made sand tailings are sent to the collector 4, and the unqualified machine-made sand tailings are sent to the pulverizer 3; the collector 4 is a cyclone collector 4, which is used to The machine-made sand tailings sorted in the first sorter 2 and the second sorter 3-1 are fully mixed, and at the same time, the suspended particles are rapidly deposited, so as to achieve no dust pollution in the production process; The device 11 is used to eliminate the negative pressure of the pipeline, and at the same time prevent the powder from running outdoors, causing dust pollution; the second elevator 12 is used to lift the machine-made sand tailings to a certain height, so that the machine-made sand tailings enter the place from top to bottom. The storage 5; the storage 5 is used to seal and store the processed machine-made sand tailings.

Since the main component of machine-made sand tailings is CaCO ₃ and the particle size is small (the content of machine-made sand tailings with a particle size <45μm is greater than 50%), the particles of machine-made sand tailings are easy to adhere to the surface of the pipeline, and it is not easy to slide and roll, resulting in pipe blockage. In this embodiment, the use of a screw conveyor to transport the machine-made sand tailings can smoothly transport the particles to the next processing device in a rotating manner, effectively solving the problem of easy pipe blockage during transportation; at the same time, the use of a negative pressure suction source The connected first communication pipe 9 and the second communication pipe 10 convey the machine-made sand tailings of qualified mesh, and the stone powder is sucked into the next processing device under the action of negative pressure.

Continuing to refer to FIG. 2 , the pulverizer 3 includes a second sorting machine 3-1 and a grinding machine 3-2 disposed below the second sorting machine 3-1, and the grinding machine 3-2 includes an inner cylinder 3 -2-1, an outer cylinder 3-2-2 and a grinding chamber 3-2-3, the inner cylinder 3-2-1 is sleeved inside the outer cylinder 3-2-2, the inner cylinder 3- The interior of 2-1 is a buffer chamber 3-2-1-2. The inner cylinder 3-2-1 and the outer cylinder 3-2-2 surround a powder suction channel 3-3. The powder suction channel 3 The upper port of -3 and the upper port of the buffer chamber 3-2-1-2 are both communicated with the second sorter 3-1, and the lower port of the powder suction channel 3-3 and the buffer chamber The lower ports of 3-2-1-2 are all communicated with the grinding chamber 3-2-3, that is, the lower ports of the powder suction channel 3-3 and the lower ports of the buffer chamber 3-2-1-2. The port and the grinding chamber 3-2-3 communicate with each other; the bottom surface of the grinding chamber 3-2-3 is provided with a grinding roller 3-2-3-1 for grinding powder, and the grinding roller 3-2 -3-1 is located directly below the buffer chamber 3-2-1-2; the inner cylinder 3-2-1 is connected to the inner wall of the outer cylinder 3-2-2 through a connecting rod 3-2-4 ; The buffer chamber 3-2-1-2 is provided with a stone powder partition 3-2-1-1, the stone powder partition 3-2-1-1 is a hollow truncated cone, and the hollow truncated stone powder partition The edge of the large-diameter end of the plate 3-2-1-1 is connected to the inner wall of the inner cylinder 3-2-1, and the small-diameter end of the hollow truncated stone powder partition plate 3-2-1-1 faces the grinding chamber 3 -2-3, the outer wall of the hollow truncated truncated stone powder separator 3-2-1-1 and the inner wall of the inner cylinder 3-2-1 form an included angle of 55-75°, and the hollow truncated truncated stone powder The cross-sectional area of the small diameter end of the separator 3-2-1-1 is 1/2 of the cross-sectional area of the buffer chamber 3-2-1-2, and the hollow frusto-conical stone powder separator 3-2-1-1 will The buffer chamber 3-2-1-2 is divided into an upper chamber 3-2-1-2-1 and a lower chamber 3-2-1-2-2 which are communicated with each other. The grinding machine 3-2 is used for grinding unqualified machine-made sand tailings, and the second sorting machine 3-1 is used for screening qualified machine-made sand tailings, and the screened qualified machine-made sand tailings are The unqualified machine-made sand tailings are sent into the collector 4, and the unqualified sand tailings fall into the grinding chamber 3-2-3 through the buffer chamber 3-2-1-2 to continue grinding.

As shown in FIG. 3 , the working principle/work flow of the above-mentioned machine-made sand tailings grinding and processing system is: the original machine-made sand tailings are lifted to the first screw conveyor 6 under the action of the first elevator 1, so the The first screw conveyor 6 transports the machine-made sand tailings into the first sorting machine 2, and the machine-made sand tailings that meet the requirements selected by the first sorting machine 2 pass through the first communication The pipe 9 enters the collector 4, and the unsatisfactory machine-made sand tailings are transported to the pulverizer 3 through the second screw conveyor 7 for grinding and sorting, and the ground machine-made sand tailings are in the negative state. Under the action of pressure and suction, the powder enters the second sorting machine 3-1 through the powder suction channel 3-3 or the buffer chamber 3-2-1-2, and the second sorting machine 3-1 passes through the The materials with qualified particle size screened by the classifier 3-1-1 are sent into the collector 4 through the second communication pipe 10, and the unqualified machine-made sand tailings pass through the buffer chamber under the action of gravity. 3-2-1-2 Drop into the grinding chamber 3-2-3 and grind again through the grinding roller 3-2-3-1, repeat the above steps in turn, until all the machine-made sand tailings are ground to All can enter the collector 4 through the screening of the classifier 3-1-1; the qualified machine-made sand tailings enter the collector 4 and are sent to the dust removal device through the third screw conveyor 8 11 to carry out dust removal and elimination of negative pressure in the pipe, and then enter the storage 5 for storage under the action of the second elevator 12. At this time, the entire processing process can be completed.

In the present invention, the first elevator 1, the first sorting machine 2, the collector 4, the dust removal device 11, the second elevator 12 and the storage 5 are all In the prior art, in order to save space, their specific structures will not be described here.

In another embodiment of the present invention, the stone powder separator 3-2-1-1 is a semi-circle, and the edge of the arc end of the semi-circle is connected to the inner wall of the inner cylinder 3-2-1 connected, the diameter end of the semicircle faces the grinding chamber 3-2-3.

In another embodiment of the present invention, the stone powder separator 3-2-1-1 can be in other shapes, and the upper cavity 3-2-1-2-1 and the lower cavity 3-2 The size of the opening connected between -1-2-2 can be other specifications, as long as the stone powder separator 3-2-1-1 can effectively block some unqualified fine machine-made sand tailing particles from entering the second sorting It is enough that the machine-made sand tailings can smoothly enter the grinding chamber 3-2-3 through the buffer chamber 3-2-1-2 without affecting the machine 3-1.

To sum up, the system for grinding and processing machine-made sand tailings of the present invention adopts "selection first and then grinding" combined with "grinding, sorting and semi-isolation". Among them, the technology of "first selection and then grinding" means adding a sorting step at the front end of the mill 3, sorting by the first sorting machine 2, and passing the qualified machine-made sand tailings in the sorting directly through the The first communication pipe 9 is sent into the collector 4, and the unqualified machine-made sand tailings are sent into the pulverizer 3 through the first screw conveyor 6, so as to avoid the qualified machine-made sand tailings from being reused again. The phenomenon of entering the pulverizer 3 for grinding, thereby reducing equipment loss and greatly improving work efficiency; Stone powder partition 3-2-1-1, which effectively blocks unqualified fine particles and makes them suspended in the lower cavity 3-2-1-2-2, so that fine particles can quickly enter the inner grinding chamber 3-2-3 completes the grinding, thereby greatly improving the grinding and sorting efficiency. The combination of the above two technologies improves the working efficiency of stone powder grinding by more than 50%, and can greatly reduce energy consumption and production costs, and improve the quality of finished products.

The above description is a detailed description of the preferred feasible embodiments of the present utility model, but the embodiments are not intended to limit the scope of the patent application of the present utility model. All should belong to the scope of the patent covered by this utility model.

Claims (7)

1. A machine-made sand tailing grinding treatment system is characterized by comprising a first hoister, a first sorting machine, a grinding machine, a collector and a storage device which are sequentially connected; the pulverizer comprises a second separator and a grinder arranged below the second separator, the grinder comprises an inner tube, an outer tube and a grinding chamber, the inner tube is sleeved inside the outer tube, the inner tube is a buffer chamber, the inner tube and the outer tube surround to form a powder suction channel, an upper port of the powder suction channel and an upper port of the buffer chamber are communicated with the second separator, a lower port of the powder suction channel and a lower port of the buffer chamber are communicated with the grinding chamber, and a grinding roller for grinding powder is arranged in the grinding chamber; be equipped with the mountain flour baffle in the surge chamber, the stiff end of mountain flour baffle with the inner tube is connected, just the free end orientation of mountain flour baffle the grinding room, the mountain flour baffle will the surge chamber divide into epicoele and cavity of resorption, the epicoele with the cavity of resorption is through an opening intercommunication, open-ended area does the 1/3-3/4 of surge chamber cross-sectional area.

2. The machine-made sand tailings grinding processing system of claim 1, wherein: the grinding roller is arranged on the bottom surface of the grinding chamber and is positioned right below the buffer chamber; the inner cylinder is connected with the inner wall of the outer cylinder through a connecting rod.

3. The machine-made sand tailings grinding processing system of claim 1, wherein: first lifting machine with first sorter is connected through first screw conveyer, first sorter with the milling machine passes through the second screw conveyer and connects, first sorter with the collector passes through first communicating pipe and connects, the milling machine with the collector passes through the second and connects communicating pipe, the collector with the accumulator passes through the third screw conveyer and connects.

4. The machine-made sand tailings grinding processing system of claim 3, wherein: and the third screw conveyer is connected with the storage device sequentially through a dust removal device and a second lifting machine.

5. The machine-made sand tailings grinding processing system of claim 1, wherein: the stone powder partition plate is in a hollow circular truncated cone shape, the edge of the large-diameter end of the hollow circular truncated cone-shaped stone powder partition plate is connected with the inner wall of the inner cylinder, and the small-diameter end of the hollow circular truncated cone-shaped stone powder partition plate faces the grinding chamber.

6. The machine-made sand tailings grinding treatment system according to claim 1 or 5, wherein: the plane of the stone powder partition board and the inner wall of the inner barrel form an included angle of 55-75 degrees.

7. The machine-made sand tailings grinding processing system of claim 5, wherein: the cross section area of the small-diameter end of the hollow truncated cone-shaped stone powder partition plate is 1/2 of the cross section area of the buffer chamber.

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