CN219519595U - Limestone dry sand making system - Google Patents
Limestone dry sand making system Download PDFInfo
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- CN219519595U CN219519595U CN202320685034.3U CN202320685034U CN219519595U CN 219519595 U CN219519595 U CN 219519595U CN 202320685034 U CN202320685034 U CN 202320685034U CN 219519595 U CN219519595 U CN 219519595U
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- vibrating screen
- frequency vibrating
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- 239000004576 sand Substances 0.000 title claims abstract description 51
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 17
- 239000006028 limestone Substances 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 44
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 5
- 239000000428 dust Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 230000003139 buffering effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims 2
- 239000004575 stone Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Landscapes
- Combined Means For Separation Of Solids (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The utility model discloses a limestone dry sand making system, which comprises a first hydraulic high-frequency vibrating screen, wherein one outlet of the hydraulic high-frequency vibrating screen is connected with a combined powder concentrator, and the other outlet of the hydraulic high-frequency vibrating screen is connected with an intermediate bin for further crushing treatment; the outlet of the intermediate bin is sequentially connected with a vertical shaft impact crusher and a second hydraulic high-frequency vibrating screen; the outlet of the second hydraulic high-frequency vibrating screen is connected with a distributing valve for distributing materials according to fineness modulus, the first outlet of the distributing valve is connected with a combined powder selecting machine, the second outlet is connected with an intermediate bin for cyclic crushing, and the third outlet is connected with a pair roller machine for grading adjustment; the outlet of the double-roller machine is connected with the combined powder selecting machine. The combination of the components of the utility model can realize the on-line adjustment of the modulus of the machine-made sand system, and adjust the stone powder content according to the requirements, thereby achieving the purposes of high machine-made sand quality and overall investment saving of the system.
Description
Technical Field
The utility model relates to a sand making system, in particular to a limestone dry sand making system.
Background
The construction aggregate may be classified into coarse aggregate and fine aggregate according to particle size. Fine aggregate generally refers to materials with a particle size of less than 4.75mm, commonly known as sand. Sand can be classified into natural sand and machine-made sand according to its source. Natural sand resources are relatively tense, and production of machine-made sand is required to meet the social demand for sand.
The main production process of machine-made sand at the present stage comprises vertical shaft impact breaking and crushing sand making, double-rotor sand making machine-made sand, hammer impact breaking sand making, rod mill machine-made sand and ball mill machine-made sand. In order to meet the working performances of water demand, fluidity, compressive strength and the like, the concrete has definite requirements on parameters such as grain size, fineness modulus, stone powder content, grain composition and the like of machine-made sand.
There are several sand making processes in the industry currently in existence, but the following drawbacks are caused by the reasons of the equipment itself or the choice of the process parameters: (1) The crushing equipment in the sand making process is single, only a vertical shaft impact crusher is selected, and the grain size grading gear breakage occurs; (2) The stone powder (below 200 meshes) is too high in the sand making process, so that the stone powder content cannot be regulated; (3) In the crushing process of part of the sand making process, the machine-made sand grains prepared by the crushing equipment are poor in shape and have great influence on the slump and compressive strength of the concrete.
Disclosure of Invention
The utility model aims to: the utility model aims to provide a limestone dry sand making system capable of adjusting the content of stone powder and having high sand quality.
The technical scheme is as follows: the limestone dry sand making system comprises a first hydraulic high-frequency vibrating screen, wherein one outlet of the hydraulic high-frequency vibrating screen is connected with a combined powder concentrator, and the other outlet of the hydraulic high-frequency vibrating screen is connected with an intermediate bin for further crushing treatment; the outlet of the intermediate bin is sequentially connected with a vertical shaft impact crusher and a second hydraulic high-frequency vibrating screen; the outlet of the second hydraulic high-frequency vibrating screen is connected with a distributing valve for distributing materials according to fineness modulus; the first outlet of the material distributing valve is connected with the combined powder selecting machine, the second outlet of the material distributing valve is connected with the middle bin for cyclic crushing, and the third outlet of the material distributing valve is connected with the roller pair machine for grading adjustment; and the outlet of the roller pair machine is connected with the combined powder selecting machine.
The feed inlet of the combined powder concentrator is provided with a feed chute, the feed chute comprises a plurality of distributing chute, and the distributing chute is provided with a bending part.
Wherein the feeding slide comprises a vertical feeding area and an inclined feeding area; a connecting part for buffering is arranged between the vertical feeding areas and the inclined feeding areas; the connecting part reduces the longitudinal initial speed of the material. The inclined feeding area is provided with a bending for reducing the speed in the horizontal direction. Namely, the bending structure of the material distributing chute can reduce the speed of the material in the horizontal direction as much as possible in the descending process. The side of the material distributing chute is provided with a side plate for reducing the material flow speed.
The outlet of the combined powder concentrator is connected with a circulating fan, and high-speed air flow generated by the circulating fan separates dust from machine-made sand.
The first hydraulic high-frequency vibrating screen, the second hydraulic high-frequency vibrating screen, the vertical shaft impact crusher and the combined powder selecting machine are all connected with a dust collecting system.
Wherein, the dust collecting system comprises a dust collector and a fan.
And a lifting machine is arranged between the first hydraulic high-frequency vibrating screen and the roller pair machine and between the first hydraulic high-frequency vibrating screen and the combined powder selecting machine respectively.
And the size of the roll gap of the pair of rollers is adjusted on line in real time according to the detection result of the finished product.
Wherein, the feed divider valve is an electric three-way feed divider valve.
The beneficial effects are that: compared with the prior art, the utility model has the following remarkable effects: (1) The combination of all the components can realize the on-line adjustment of the modulus of the machine-made sand system, and the stone powder content is adjusted according to the requirements, so that the purposes of high machine-made sand quality and overall investment saving of the system are achieved. (2) The multiple distributing chute in the feeding chute can force equal-width powder, so that the powder selecting effect is improved; (2) A vertical shaft impact crusher is selected on the main sand making machine to achieve the purposes of round and smooth machine-made sand grain and high sphericity. (3) A pair roller is selected as the fineness modulus adjusting ring section to make up for the small amount of stones with the grain diameter of 0.65 mm-2.36 mm in the crushing process of the vertical shaft impact crusher of the main crusher. (4) The screening equipment selects a hydraulic high-frequency vibrating screen, high-frequency low-amplitude vibrating screen, small material screening is facilitated, and the problem of hole blocking when the water content of the material is slightly high is solved. (5) The powder control adopts a combined powder concentrator, the stone powder content is accurately controlled, and the characteristic that a single cyclone cylinder type powder concentrator is not suitable for scouring of large materials is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic perspective view of a feed chute according to the present utility model;
FIG. 3 is a left side, front and top view of the feed chute of the present utility model;
FIG. 4 is a schematic diagram of the process flow structure of the present utility model.
Detailed Description
The present utility model is described in further detail below.
As shown in fig. 1, the embodiment provides a limestone dry sand making process system, which comprises a first hydraulic high-frequency vibrating screen 01, an intermediate bin 02, a vertical shaft impact crusher 03, a first lifting machine 04, a second hydraulic high-frequency vibrating screen 05, an electric three-way material separating valve 06/07, a double-roller machine 08, a second lifting machine 09, a combined powder selecting machine 10, a circulating fan 11, a dust collector I12, a dust collector II 13, a fan 14 and a fan 15.
One outlet of the first hydraulic high-frequency vibrating screen 01 is connected with a second lifter 09, an outlet of the second lifter 09 is connected with the combined powder concentrator 10, and the other outlet of the first hydraulic high-frequency vibrating screen 01 is connected with the middle bin 02; the materials which are screened out from the first hydraulic high-frequency vibrating screen 01 and meet the requirements enter the combined powder concentrator 10 through the second lifting machine 09, and the materials which do not meet the requirements enter the intermediate bin 02 for further crushing treatment.
The outlet of the intermediate bin 02 is connected with a vertical shaft impact crusher 03, and the vertical shaft impact crusher 03 is connected with a second hydraulic high-frequency vibrating screen 05 through a first lifting machine 04; the outlet of the second hydraulic high-frequency vibrating screen 05 is connected with a distributing valve 06/07 for distributing materials according to fineness modulus; the distributing valve 06/07 of the embodiment is an electric three-way distributing valve. The first outlet of the distributing valve 06/07 of the embodiment is connected with the combined powder concentrator 10, the second outlet is connected with the middle bin 02 for cyclic crushing, and the third outlet is connected with the double-roller machine 08 for grading adjustment; the outlet of the counter roller 08 is connected with the combined powder concentrator 10; the outlets of the second hydraulic high-frequency vibrating screen and the double-roller machine 08 are connected with the combined powder concentrator 10 through a second hoister.
And controlling the powder content of the finished product material, wherein the material-gas ratio is required to be 1:5 by using a combined powder concentrator. In order to achieve the powder selecting effect, the materials fed into the powder selecting machine are required to be uniformly dispersed and arranged. The feed inlet of the combined powder concentrator 10 of the embodiment is provided with a feed chute, as shown in (a), (b) and (c) in fig. 2 and 3, the feed chute comprises a plurality of distributing chute 16; the distributing chute 16 is divided into a vertical feeding area 17 and an inclined feeding area 18; a connecting part 19 for buffering is arranged between the vertical feeding area 17 and the inclined feeding area 18; the connection 19 reduces the longitudinal initial velocity of the material. The inclined feed zone 18 is provided with bends for reducing the velocity in the horizontal direction. Namely, the bending structure of the material distributing chute can reduce the speed of the material in the horizontal direction as much as possible in the descending process. The sides of the distribution chute are provided with side plates 20 for reducing the material flow speed. The material enters from the top of the vertical zone.
The working process of the utility model is as shown in fig. 4:
after the materials enter the first hydraulic high-frequency vibrating screen 01 for screening, the materials meeting the particle size requirement enter the combined powder concentrator 10 through the bucket elevator 09, the materials larger than the size requirement enter the 02 middle bin and then enter the 03 vertical shaft impact crusher for crushing, so that the small materials are low in acceleration kinetic energy, the crushing effect is poor, the buffering effect on the large materials is reduced, and the sand forming rate of the materials is guaranteed.
After being crushed by a vertical shaft impact crusher 03, the materials are lifted to a second hydraulic high-frequency vibrating screen 05 by a first lifting machine 04, screened by the second hydraulic high-frequency vibrating screen 05, and then separated according to fineness modulus by two electric three-way material separating valves 06/07, part of the materials enter a 02 middle bin for cyclic crushing, and part of the materials are crushed by a pair of rollers 08 for grading adjustment, so that fineness modulus and grain grading of machine-made sand are guaranteed to meet the requirement of fine sand. The materials meeting the requirements after being crushed by the vertical shaft impact crusher 03 and the materials with the crushing gradation adjusted by the pair roller 08 are used as finished products and are sent into the combined powder selector 10 by the second lifter 09.
The dust generated by the crushing and screening system is brought into a dust collecting system consisting of the dust collector 12 and the fan 14 by air, and after being collected and captured by the dust collector 12, the dust reaches the emission standard and is discharged by the fan 14.
After the material enters the combined powder selecting machine 10 from the feeding chute, the high-speed air flow generated by the operation of the circulating fan 11 separates dust from machine-made sand to reach the powder content standard of the machine-made sand. Part of gas participating in powder selection enters an external exhaust system formed by the dust collector 13 and the fan 15, and after the dust in the gas is collected and captured by the dust collector 13, the gas reaches the emission standard and is exhausted by the fan 15.
The finished product sent by the former step is sent to the combined powder selecting machine for selecting powder 10 by the bucket elevator 09, so that the finished product meets the national standard requirement and achieves the effect of producing fine machine-made sand. According to different physical properties of materials and different crystal granularity of rock, the linear speed of the vertical shaft impact crusher is easy to select 65-75 m/s. And (3) according to the fineness modulus of the finished product and the grain composition requirement, the size of the roll gap of the double-roll machine is adjusted on site, and according to the detection result of the finished product, the roll gap is adjusted on line in real time.
Claims (10)
1. The limestone dry sand making system is characterized by comprising a first hydraulic high-frequency vibrating screen (01), wherein one path of outlet of the hydraulic high-frequency vibrating screen is connected with a combined powder concentrator (10), and the other path of outlet is connected with an intermediate bin (02) for further crushing treatment; the outlet of the intermediate bin (02) is sequentially connected with a vertical shaft impact crusher (03) and a second hydraulic high-frequency vibrating screen (05); an outlet of the second hydraulic high-frequency vibrating screen (05) is connected with a distributing valve for distributing materials according to fineness modulus; the first outlet of the material distributing valve is connected with the combined powder selecting machine (10), the second outlet of the material distributing valve is connected with the middle bin (02) for cyclic crushing, and the third outlet of the material distributing valve is connected with the roller pair machine (08) for grading adjustment; the outlet of the pair of roller machines (08) is connected with the combined powder concentrator (10).
2. Limestone dry sand making system according to claim 1, characterized in that the feed inlet of the combined concentrator (10) is provided with a feed chute comprising a plurality of distribution chute (16), the distribution chute (16) being provided with bends.
3. Limestone dry process sand making system according to claim 2, characterized in that the feed chute comprises a vertical feed zone (17) and an inclined feed zone (18); a connecting part (19) for buffering is arranged between the vertical feeding area (17) and the inclined feeding area (18); the inclined feed zone (18) is provided with a bend for reducing the speed in the horizontal direction.
4. A limestone dry sanding system according to claim 2, wherein the side edges of the distribution chute (16) are provided with side panels (20) for reducing the flow rate of the material.
5. The limestone dry method sand making system according to claim 1, wherein an outlet of the combined powder concentrator (10) is connected with a circulating fan (11), and high-speed air flow generated by the circulating fan (11) separates dust from machine-made sand.
6. The limestone dry method sand making system according to claim 1, wherein the first hydraulic high frequency vibrating screen (01), the second hydraulic high frequency vibrating screen (05), the vertical shaft impact crusher (03) and the combined powder concentrator (10) are all connected with dust collecting systems.
7. The limestone drying method of claim 6 wherein the dust collection system includes a dust collector and a fan.
8. The limestone dry method sand making system according to claim 1, wherein a lifter is provided between the first hydraulic high-frequency vibrating screen (01), the second hydraulic high-frequency vibrating screen (05), the counter roller (08) and the combined powder selecting machine (10).
9. The limestone dry method sand making system according to claim 1, wherein the size of the roll gap of the pair of rollers (08) is adjusted in real time on line according to the finished product detection result.
10. The limestone dry method for producing sand system of claim 1 wherein the diverter valve is an electric three-way diverter valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320685034.3U CN219519595U (en) | 2023-03-31 | 2023-03-31 | Limestone dry sand making system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320685034.3U CN219519595U (en) | 2023-03-31 | 2023-03-31 | Limestone dry sand making system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219519595U true CN219519595U (en) | 2023-08-15 |
Family
ID=87585666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320685034.3U Active CN219519595U (en) | 2023-03-31 | 2023-03-31 | Limestone dry sand making system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219519595U (en) |
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2023
- 2023-03-31 CN CN202320685034.3U patent/CN219519595U/en active Active
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