CN112916181A - Sand production process for dust suppression and flying sand prevention under strong wind condition - Google Patents
Sand production process for dust suppression and flying sand prevention under strong wind condition Download PDFInfo
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- CN112916181A CN112916181A CN202110128909.5A CN202110128909A CN112916181A CN 112916181 A CN112916181 A CN 112916181A CN 202110128909 A CN202110128909 A CN 202110128909A CN 112916181 A CN112916181 A CN 112916181A
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- production process
- strong wind
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- 239000004576 sand Substances 0.000 title claims abstract description 126
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000428 dust Substances 0.000 title claims abstract description 22
- 230000001629 suppression Effects 0.000 title description 3
- 230000002265 prevention Effects 0.000 title description 2
- 239000004575 stone Substances 0.000 claims abstract description 85
- 239000000463 material Substances 0.000 claims abstract description 40
- 238000012216 screening Methods 0.000 claims abstract description 27
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 7
- 239000002002 slurry Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000010865 sewage Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 11
- 238000001556 precipitation Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 201000001883 cholelithiasis Diseases 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 5
- 235000013339 cereals Nutrition 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
The invention provides a sand production process for suppressing dust and preventing flying sand under the condition of strong wind, which comprises the following steps: primary crushing, performing primary screening after crushing, feeding small stone materials into a mixing bin, and feeding large stone materials into secondary crushing; conveying the material subjected to secondary crushing to a high-frequency sieve by using a belt conveyor, spraying by using a high-pressure spraying pipe at the outlet of the belt conveyor, conveying stones on the sieve surface to a mixing bin to be mixed with small stones, and feeding the slurry under the sieve into a spiral classifier to recover stones; the mixed stone enters a sand making crusher to be crushed, and stone powder is removed through sand washing after the crushing, and finally the crushed mixed stone enters a sand silo. By adopting the invention, the generation of dust is effectively prevented, the hole blocking probability is greatly reduced, the screening effect and the sand quality are ensured, and the energy is saved. Through mixing the building stones, guaranteed that the moisture content of system sand breaker feeding is less than 2%, prevented stifled chamber of breaker, guaranteed production efficiency, reduced the potential safety hazard.
Description
Technical Field
The invention relates to the technical field of artificial sand making, in particular to a sand production process for suppressing dust and preventing flying sand under the condition of strong wind.
Background
When sand and stone processing is carried out under the condition of strong wind, although spraying devices are arranged at a plurality of places in a production field for dust suppression, raised dust during screening is still difficult to solve, and the produced sand is large, thereby causing serious environmental influence. In order to solve the problem of large wind sand, the traditional method is to arrange a spray pipe on the screen surface. However, in a sandstone production workshop, due to the fact that the content of stone powder and fine sand in materials before screening is large, screen holes are prone to being blocked during spraying, the screening penetration rate is reduced, the materials are not easy to perceive, refined sand materials repeatedly enter a crusher, energy is wasted, and the quality of the sand and the stone in a subsequent crushing process is also prone to being rapidly deteriorated. In addition, the water content of the stone at the screen surface outlet after spraying is large, the stone brings water into the belt conveyor, and the stone is brought into the sand making crusher through the belt conveyor, so that the crusher is easily blocked, the shutdown maintenance is forced, the production efficiency is seriously affected, and even the risk of production accidents is also accompanied.
Disclosure of Invention
In order to solve the technical problems, the invention provides a sand and stone production process for suppressing dust and preventing flying sand under the condition of strong wind.
The invention is realized by the following technical scheme.
The invention provides a sand production process for suppressing dust and preventing flying sand under the condition of strong wind, which comprises the following steps:
step one, primary crushing, namely feeding raw materials with the particle size of 40-120 mm into a crusher, performing primary screening after crushing, feeding small stone materials into a mixing bin, and feeding large stone materials into secondary crushing;
step two, wet screening, wherein the material after the secondary crushing is conveyed to a high-frequency screen by a belt conveyor, the outlet of the belt conveyor is sprayed by a high-pressure spraying pipe, the spraying water flow is adjusted, the water content of the fed material is 15% -25%, three screen plates are sequentially arranged on the working surface of the high-frequency screen from top to bottom, the stone material is conveyed to a mixing bin after passing through the three screen plates in sequence, slurry under the high-frequency screen enters a spiral classifier to recover the sand stone, and the sand stone enters a sand bin after being dehydrated by a dehydration screen;
and step three, sand making and crushing, namely mixing the small stone from the first-stage crushing and the stone from the wet screening in a mixing bin in proportion to ensure that the water content is lower than 2% after mixing, crushing the mixture in a sand making crusher, washing the crushed mixture with sand to remove stone powder, and finally feeding the crushed mixture in a sand bin.
The method comprises the following steps of firstly, crushing, wherein small stones are stones with the grain size within 20mm, and large stones are stones with the grain size exceeding 20 mm.
In the first step, an S4800 cone crusher is adopted for primary crushing.
In the first step, an HP300 cone crusher is adopted for secondary crushing.
And step two, wet screening, wherein when the flow of spraying water is regulated, the water content of the feed material of the high-frequency screen is 18-22%.
And step two, wet screening, namely after the spiral classifier recovers the sand, carrying out precipitation separation on discharged water, conveying the fine sand to a dewatering screen after precipitating the fine sand by utilizing the precipitation time difference of the fine sand and the stone powder, conveying the fine sand to a sand bin after dewatering, and mixing the fine sand with finished sand.
And after the precipitation separation, discharging the generated sewage and the sewage generated by the dewatering screen to a sewage plant.
And step two, wet screening, wherein the mesh size of the first screen is 5mm, and the meshes of the rest two screen plates are not less than 5 mm.
And step three, sand making and crushing, wherein in the sand washing process after crushing, the produced sewage enters a spiral classifier to recover sand and stone, and then is precipitated and separated to separate and recover fine sand, and finally is discharged into a sewage plant.
And step three, sand making and crushing, wherein a B9100 vertical shaft crusher is adopted.
The invention has the beneficial effects that:
by adopting the invention, the spray water pipe is arranged at the inlet of the high-frequency screen, so that the spray water and the sand and stone material are quickly mixed, and the generation of raised dust is effectively prevented. When the water content of the mixture is 15% -25%, under the action of impact force, fine materials causing screen hole blockage easily pass through the first screen, and the fine material content of the latter two screens is very low, so that the probability of hole blockage is greatly reduced, the screening effect and the sand quality are ensured, and the energy is saved. Two back screen cloth dewater in the screening for the building stones water content of high frequency sieve discharge end is less than 3%, mixes through this building stones and the small stone material that comes from the one-level breakage, has guaranteed that the moisture content of system sand breaker feeding is less than 2%, has prevented the stifled chamber of breaker, has guaranteed production efficiency, has reduced the potential safety hazard.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The invention provides a sand production process for suppressing dust and preventing flying sand under the condition of strong wind, which comprises the following steps:
step one, primary crushing, namely feeding raw materials with the particle size of 40-120 mm into a crusher, performing primary screening after crushing, feeding small stone materials into a mixing bin, and feeding large stone materials into secondary crushing;
step two, wet screening, wherein the material after the secondary crushing is conveyed to a high-frequency screen by a belt conveyor, the outlet of the belt conveyor is sprayed by a high-pressure spraying pipe, the spraying water flow is adjusted, the water content of the fed material is 15% -25%, three screen plates are sequentially arranged on the working surface of the high-frequency screen from top to bottom, the stone material is conveyed to a mixing bin after passing through the three screen plates in sequence, slurry under the high-frequency screen enters a spiral classifier to recover the sand stone, and the sand stone enters a sand bin after being dehydrated by a dehydration screen;
and step three, sand making and crushing, namely mixing the small stone from the first-stage crushing and the stone from the wet screening in a mixing bin in proportion to ensure that the water content is lower than 2% after mixing, crushing the mixture in a sand making crusher, washing the crushed mixture with sand to remove stone powder, and finally feeding the crushed mixture in a sand bin.
By adopting the invention, the spray water pipe is arranged at the inlet of the high-frequency screen, so that the spray water and the sand and stone material are quickly mixed, and the generation of raised dust is effectively prevented. When the water content of the mixture is 15% -25%, under the action of impact force, fine materials causing screen hole blockage easily pass through the first screen, and the fine material content of the latter two screens is very low, so that the probability of hole blockage is greatly reduced, the screening effect and the sand quality are ensured, and the energy is saved. Two back screen cloth dewater in the screening for the building stones water content of high frequency sieve discharge end is less than 3%, mixes through this building stones and the small stone material that comes from the one-level breakage, has guaranteed that the moisture content of system sand breaker feeding is less than 2%, has prevented the stifled chamber of breaker, has guaranteed production efficiency, has reduced the potential safety hazard.
The method comprises the following steps of firstly, crushing, wherein small stones are stones with the grain size within 20mm, and large stones are stones with the grain size exceeding 20 mm. Through the graded crushing, the feeding particle size difference of the sand making crusher is effectively controlled, and the influence on the crushing effect caused by the generation of gaps due to large stones in the crushing cavity is avoided.
In the first step, an S4800 cone crusher is adopted for primary crushing. Ensures the crushing effect and the treatment capacity and reduces the content of the needle-shaped stones in the small stones.
In the first step, an HP300 cone crusher is adopted for secondary crushing. The full breakage of stone materials is guaranteed, the whole grain size of broken stone materials is smaller than that of small stone materials broken in one level, the gap of the sand making crusher is convenient to fill, the breaking effect is improved, and the quality of sand and stone is improved.
And step two, wet screening, wherein when the flow of spraying water is regulated, the water content of the feed material of the high-frequency screen is 18-22%. Under this humidity, guaranteed that the fine material of first screen cloth sieves the rate of penetrating at more than 80%, and avoided wasting water resource.
And step two, wet screening, namely after the spiral classifier recovers the sand, carrying out precipitation separation on discharged water, conveying the fine sand to a dewatering screen after precipitating the fine sand by utilizing the precipitation time difference of the fine sand and the stone powder, conveying the fine sand to a sand bin after dewatering, and mixing the fine sand with finished sand. The fine sand is recycled and mixed with the finished sand, so that the average particle size of the sand and stone materials is adjusted, the quality of sand and stone is improved, and the difficulty in sewage treatment is reduced due to the reduction of the fine sand in the sewage.
And after the precipitation separation, discharging the generated sewage and the sewage generated by the dewatering screen to a sewage plant. Is convenient for the centralized treatment of sewage.
And step two, wet screening, wherein the mesh size of the first screen is 5mm, and the meshes of the rest two screen plates are not less than 5 mm. The sand powder passing rate of less than 2.5mm is ensured to be more than 80%, and the hole plugging probability is reduced; meanwhile, sand materials are effectively screened out, the sand materials are prevented from repeatedly entering the crusher to be crushed, energy is saved, and the quality of the sand and stone is guaranteed.
And step three, sand making and crushing, wherein in the sand washing process after crushing, the produced sewage enters a spiral classifier to recover sand and stone, and then is precipitated and separated to separate and recover fine sand, and finally is discharged into a sewage plant. Through spiral classifier and deposit separation centralized processing, improved the utilization ratio in place and machinery, and effectively retrieved the grit material, not only improved economic nature, avoided extravagant, still reduced the sewage treatment degree of difficulty.
And step three, sand making and crushing, wherein a B9100 vertical shaft crusher is adopted. The quality of the sand and stone is ensured, and the content of the stone powder is reduced.
Claims (10)
1. A sand production process for suppressing dust and preventing flying sand under the condition of strong wind is characterized in that: comprises the following steps of (a) carrying out,
step one, primary crushing, namely feeding raw materials with the particle size of 40-120 mm into a crusher, performing primary screening after crushing, feeding small stone materials into a mixing bin, and feeding large stone materials into secondary crushing;
step two, wet screening, wherein the material after the secondary crushing is conveyed to a high-frequency screen by a belt conveyor, the outlet of the belt conveyor is sprayed by a high-pressure spraying pipe, the spraying water flow is adjusted, the water content of the fed material is 15% -25%, three screen plates are sequentially arranged on the working surface of the high-frequency screen from top to bottom, the stone material is conveyed to a mixing bin after passing through the three screen plates in sequence, slurry under the high-frequency screen enters a spiral classifier to recover the sand stone, and the sand stone enters a sand bin after being dehydrated by a dehydration screen;
and step three, sand making and crushing, namely mixing the small stone from the first-stage crushing and the stone from the wet screening in a mixing bin in proportion to ensure that the water content is lower than 2% after mixing, crushing the mixture in a sand making crusher, washing the crushed mixture with sand to remove stone powder, and finally feeding the crushed mixture in a sand bin.
2. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: the method comprises the following steps of firstly, crushing, wherein small stones are stones with the grain size within 20mm, and large stones are stones with the grain size exceeding 20 mm.
3. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: in the first step, an S4800 cone crusher is adopted for primary crushing.
4. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: in the first step, an HP300 cone crusher is adopted for secondary crushing.
5. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: and step two, wet screening, wherein when the flow of spraying water is regulated, the water content of the feed material of the high-frequency screen is 18-22%.
6. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: and step two, wet screening, namely after the spiral classifier recovers the sand, carrying out precipitation separation on discharged water, conveying the fine sand to a dewatering screen after precipitating the fine sand by utilizing the precipitation time difference of the fine sand and the stone powder, conveying the fine sand to a sand bin after dewatering, and mixing the fine sand with finished sand.
7. A sand and stone production process for suppressing dust and preventing flying sand under the condition of strong wind as claimed in claim 6, characterized in that: and after the precipitation separation, discharging the generated sewage and the sewage generated by the dewatering screen to a sewage plant.
8. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: and step two, wet screening, wherein the mesh size of the first screen is 5mm, and the meshes of the rest two screen plates are not less than 5 mm.
9. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: and step three, sand making and crushing, wherein in the sand washing process after crushing, the produced sewage enters a spiral classifier to recover sand and stone, and then is precipitated and separated to separate and recover fine sand, and finally is discharged into a sewage plant.
10. The sand and stone production process for suppressing dust and preventing flying sand under the strong wind condition as claimed in claim 1, which is characterized in that: and step three, sand making and crushing, wherein a B9100 vertical shaft crusher is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128909.5A CN112916181A (en) | 2021-01-29 | 2021-01-29 | Sand production process for dust suppression and flying sand prevention under strong wind condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110128909.5A CN112916181A (en) | 2021-01-29 | 2021-01-29 | Sand production process for dust suppression and flying sand prevention under strong wind condition |
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| CN112916181A true CN112916181A (en) | 2021-06-08 |
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| CN202110128909.5A Pending CN112916181A (en) | 2021-01-29 | 2021-01-29 | Sand production process for dust suppression and flying sand prevention under strong wind condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413996A (en) * | 2021-06-28 | 2021-09-21 | 中国水利水电第九工程局有限公司 | Sand processing plant vertical shaft crusher sand wet method quantitative powder removal regulation and control method |
| CN113457837A (en) * | 2021-07-09 | 2021-10-01 | 中国水利水电第九工程局有限公司 | Method for washing coarse aggregate and monitoring pitch diameter on line in machine-made gravel production workshop |
| CN114849892A (en) * | 2022-05-07 | 2022-08-05 | 金易通（天津）智能装备有限公司 | Dry dust-free lump material dry separation method and system |
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Application publication date: 20210608 |