CN113171865A - Preparation method of high-quality machine-made sand - Google Patents
Preparation method of high-quality machine-made sand Download PDFInfo
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- CN113171865A CN113171865A CN202110398975.4A CN202110398975A CN113171865A CN 113171865 A CN113171865 A CN 113171865A CN 202110398975 A CN202110398975 A CN 202110398975A CN 113171865 A CN113171865 A CN 113171865A
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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
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
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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
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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Abstract
The invention belongs to the technical field of road construction or building construction machine-made sand application, and particularly discloses a preparation method of high-quality machine-made sand, which comprises the following steps of 1, mining raw material rock blocks. And 2, performing primary crushing by using a jaw crusher. And 3, performing secondary crushing by using a reaction crusher. And 4, crushing and sand making for three times by using a sand making machine. And 5, separating coarse sand and fine sand by using a powder concentrator. And 6, separating coarse sand and fine sand in the step 5. And 7, after the finished products obtained by separating the coarse sand and the fine sand are detected to be qualified, stacking and storing the finished products respectively. The preparation method of the high-quality machine-made sand has the beneficial effects that: the machine-made sand production line has the advantages of reasonable design, high automation degree of the sand production line, low operation cost, high crushing rate, energy conservation, high yield, less pollution and simple and convenient maintenance, and the machine-made sand produced by the sand production line conforms to the national building sand standard, has uniform granularity and good grain shape and is reasonable in grading.
Description
Technical Field
The invention belongs to the technical field of application of road construction or building construction machine-made sand, and particularly relates to a preparation method of high-quality machine-made sand.
Background
The machine-made sand is sand processed by the sand making machine and other accessory equipment, the finished product is more regular, and the sand can be processed into sand with different rules and sizes according to different process requirements, so that the daily requirement can be better met.
The machine-made sand is mainly applied to concrete with strength grade of C60 and below in construction projects such as buildings, municipal works, traffic and the like, and can also be applied to concrete projects such as ports, water conservancy and the like when corresponding technical requirements are met. The machine-made sand is suitable for preparing plastic concrete mixed sand and concrete with plasticity, large fluidity and pumping construction.
In the engineering construction process, the sandstone is used as an important component of a concrete structure material, and the quality of the sandstone has a significant influence on the quality and durability of the whole engineering. On the premise of meeting the performance index of the sand, an economic and feasible scheme is selected, so that the construction quality requirement is met, and the production cost is effectively controlled, so that the comprehensive benefit is obvious in the areas lacking natural sand resources.
Therefore, in view of the above problems, the present invention provides a method for preparing high-quality machine-made sand.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a preparation method of high-quality machine-made sand, which has the advantages of reasonable design, high automation degree of a sand making production line, low operation cost, high crushing rate, energy conservation, high yield, less pollution and simple and convenient maintenance, and the machine-made sand produced by the sand making production line conforms to the national building sand standard, has uniform granularity and good grain shape and is reasonable in gradation.
The technical scheme is as follows: the invention provides a preparation method of high-quality machine-made sand, which comprises the following steps of 1, mining raw material rock blocks. And 2, performing primary crushing by using a jaw crusher. And 3, performing secondary crushing by using a reaction crusher. And 4, crushing and sand making for three times by using a sand making machine. And 5, separating coarse sand and fine sand by using a powder concentrator. And 6, collecting and processing the stone powder generated in the coarse sand and fine sand separation process in the step 5 by a powder concentrator, and storing the stone powder for later use by a stone powder elevator and a powder storage tank. And 7, after the finished products obtained by separating the coarse sand and the fine sand are detected to be qualified, stacking and storing the finished products respectively, and circulating the unqualified finished products to a sand making machine for carrying out three-time crushing and sand making treatment.
According to the technical scheme, the raw material blocks and stones are mined in the step 1, the blocks and stones with hard stone and high strength are selected at the material source, the covering layer at the top of the stock ground is thoroughly removed before the wool is mined, so that sundries such as grass roots and covering soil cannot appear on the mining surface, the covering layer cleaning process is preferably finished at one time, meanwhile, a certain protection area width is reserved, and the situation that the covering soil at the boundary position slides down and is mixed into the wool due to vibration in the mining process to influence the quality of the wool is prevented; grass roots, tree roots, branches, plastics and household garbage are not required to be mixed in the shipment, and a specially-assigned person is arranged to check and clean a material source field before shipment.
According to the technical scheme, the jaw crusher, the impact crusher, the sand making machine and the powder concentrator are respectively connected with a DCS system or a PLC system to be controlled.
According to the technical scheme, the size of the sand and stone raw material in the step 1 is 10-20mm, 16-31.5mm or 20-40 mm.
According to the technical scheme, the storage bins for stacking and storing coarse sand and fine sand in the step 7 ensure neatness in a site, site hardening treatment is required to be carried out, when the site is hardened, the treatment is carried out according to the principles of low periphery and high center, C20 concrete with the thickness of 20cm is adopted for pouring a surface layer, slope releasing is carried out according to the gradient of 2% so as to facilitate site drainage, drainage ditches are arranged on the periphery of the site, rainwater grates are arranged on the drainage ditches, geotextile processing is carried out for filtering, and the drainage ditches are required to be cleaned regularly; the capacity of the storage bin meets the requirement of maximum single-batch continuous construction, and a certain margin is left. In order to prevent dust emission and control the water content of finished products, the temporary stockyard and the finished product stockyard are built with ceilings by adopting light steel structures, and the requirements of stress, wind resistance, rain and snow resistance and the like are met.
Compared with the prior art, the preparation method of the high-quality machine-made sand has the beneficial effects that: the machine-made sand production line has the advantages of reasonable design, high automation degree of the sand production line, low operation cost, high crushing rate, energy conservation, high yield, less pollution and simple and convenient maintenance, and the machine-made sand produced by the sand production line conforms to the national building sand standard, has uniform granularity and good grain shape and is reasonable in grading.
Drawings
FIG. 1 is a flow chart of a method of making high quality machine-made sand according to the present invention.
Detailed Description
The invention will be further elucidated with reference to the following specific examples.
The preparation method of the high-quality machine-made sand shown in the figure 1 comprises the following steps of 1, mining the raw material rock block. And 2, performing primary crushing by using a jaw crusher. And 3, performing secondary crushing by using a reaction crusher. And 4, crushing and sand making for three times by using a sand making machine. And 5, separating coarse sand and fine sand by using a powder concentrator. And 6, collecting and processing the stone powder generated in the coarse sand and fine sand separation process in the step 5 by a powder concentrator, and storing the stone powder for later use by a stone powder elevator and a powder storage tank. And 7, after the finished products obtained by separating the coarse sand and the fine sand are detected to be qualified, stacking and storing the finished products respectively, and circulating the unqualified finished products to a sand making machine for carrying out three-time crushing and sand making treatment.
Preferably, in the step 1, the raw material blocks and stones are mined, the blocks and stones with hard stone and high strength are selected at the material source, the covering layer at the top of the stock ground is thoroughly removed before the wool is mined, so that sundries such as grass roots and covering soil cannot appear on the mining surface, the covering layer cleaning process is preferably finished at one time, and meanwhile, a certain protection area width is reserved to prevent the covering soil at the boundary position from sliding and mixing into the wool due to vibration in the mining process and influencing the quality of the wool; grass roots, tree roots, branches, plastics and household garbage are not required to be mixed in the shipment, and a specially-assigned person is arranged to check and clean a material source field before shipment; the jaw crusher, the impact crusher, the sand making machine and the powder concentrator are respectively connected with a DCS system or a PLC system for control; the size of the sand and stone raw material in the step 1 is 10-20mm, 16-31.5mm or 20-40 mm; the storage bins for stacking and storing coarse sand and fine sand in the step 7 ensure the neatness of the site, the site is hardened, when the site is hardened, the site is subjected to surface layer pouring by adopting C20 concrete with the thickness of 20cm according to the principle of low periphery and high center, the slope is put according to the gradient of 2% so as to be beneficial to site drainage, drainage ditches are arranged on the periphery of the site, rainwater grates are arranged on the drainage ditches, geotextile is processed for filtration, and the drainage ditches are periodically cleaned; the capacity of the storage bin meets the requirement of maximum single-batch continuous construction, and a certain margin is left. In order to prevent dust emission and control the water content of finished products, the temporary stockyard and the finished product stockyard are built with ceilings by adopting light steel structures, and the requirements of stress, wind resistance, rain and snow resistance and the like are met.
Examples
The quality index of finished products enhances process monitoring, promotes efficient utilization of machine-made sand stones, namely enhances quality monitoring and control capacity of raw materials, effectively controls crushing index values, strictly controls mud block and mud content, strictly controls content of harmful impurities such as mica, sulfide and chloride, and achieves high-quality and excellent use by grading utilization according to the quality of the raw materials.
Particle size distribution of machine-made sand
The grain composition of the sand is in accordance with the following table, except for the ultra-fine sand, the grain composition of the sand can be divided into three grading areas according to the accumulated screen residue (calculated by mass percentage, the same below) of a screen hole with the square of 600 microns, the grain composition of the sand is in one area in the following table, and compared with the accumulated screen residue in the table, the actual grain composition of the sand is slightly beyond a boundary except for the accumulated screen residue with the size of 4.75mm and 600 microns, but the total excess amount is not more than 5%.
When the sand in the area I is adopted, the sand rate is increased, and the sufficient cement dosage is kept, so that the workability of the concrete is met; when the sand in the area III is adopted, the sand rate is properly reduced; when the ultra-fine sand is adopted, the mixed sand is combined with artificial sand and meets the corresponding regulations; the pump concrete is prepared, and medium sand is preferably selected.
Fineness modulus
The thickness degree of the sand is divided into four grades of coarse, medium, fine and extra-fine according to the fineness modulus muf, and the range of the sand is in accordance with the following regulations: coarse sand: μ f = 3.7-3.1 medium sand: μ f = 3.0-2.3 fine sand: μ f = 2.2-1.6 extra fine sand: μ f =1.5~0.7
Second, stone powder content of machine-made sand
Third, the crush value of the machine-made sand
Fourth, fine aggregate technical index
The machine-made sand prepared by the invention meets the national building sand standard through testing, and has uniform granularity, good grain shape and reasonable gradation.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (5)
1. A preparation method of high-quality machine-made sand is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
step 1, mining raw material rock lumps;
step 2, carrying out primary crushing by using a jaw crusher;
step 3, carrying out secondary crushing by using a reaction crusher;
step 4, crushing and sand making are carried out for three times by using a sand making machine;
step 5, separating coarse sand and fine sand by using a powder concentrator;
step 6, collecting and processing the stone powder generated in the separation process of the coarse sand and the fine sand in the step 5 by a powder concentrator, and storing the stone powder for later use by a stone powder elevator and a powder storage tank;
and 7, after the finished products obtained by separating the coarse sand and the fine sand are detected to be qualified, stacking and storing the finished products respectively, and circulating the unqualified finished products to a sand making machine for carrying out three-time crushing and sand making treatment.
2. The method of claim 1 for preparing high quality machine-made sand, wherein the method comprises the steps of: in the step 1, the raw material blocks and stones are mined, the blocks and the stones with hard stone and high strength are selected at the material source, the covering layer at the top of the stock ground is thoroughly removed before the wool is mined, so that sundries such as grass roots and covering soil cannot appear on the mining surface, the covering layer cleaning process is preferably finished at one time, and meanwhile, a certain protection area width is reserved to prevent the covering soil at the boundary position from falling off and mixing into the wool due to vibration in the mining process and influencing the quality of the wool; grass roots, tree roots, branches, plastics and household garbage are not required to be mixed in the shipment, and a specially-assigned person is arranged to check and clean a material source field before shipment.
3. The method of claim 1 for preparing high quality machine-made sand, wherein the method comprises the steps of: the jaw crusher, the impact crusher, the sand making machine and the powder concentrator are respectively connected with a DCS system or a PLC system for control.
4. The method of claim 1 for preparing high quality machine-made sand, wherein the method comprises the steps of: the size of the sand and stone raw material in the step 1 is 10-20mm, 16-31.5mm or 20-40 mm.
5. The method of claim 1 for preparing high quality machine-made sand, wherein the method comprises the steps of: the storage bins for stacking and storing coarse sand and fine sand in the step 7 ensure the neatness of the site, the site is hardened, when the site is hardened, the site is subjected to surface layer pouring by adopting C20 concrete with the thickness of 20cm according to the principle of low periphery and high center, the slope is put according to the gradient of 2% so as to be beneficial to site drainage, drainage ditches are arranged on the periphery of the site, rainwater grates are arranged on the drainage ditches, geotextile is processed for filtration, and the drainage ditches are periodically cleaned; the capacity of the storage bin meets the requirement of maximum single-batch continuous construction, a certain margin is reserved, in order to prevent dust and control the water content of finished materials, the temporary storage yard and the finished product storage yard are built on a ceiling by adopting light steel structures, and the requirements of stress, wind resistance, rain and snow resistance and the like are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110398975.4A CN113171865A (en) | 2021-04-14 | 2021-04-14 | Preparation method of high-quality machine-made sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110398975.4A CN113171865A (en) | 2021-04-14 | 2021-04-14 | Preparation method of high-quality machine-made sand |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798148A (en) * | 2022-03-23 | 2022-07-29 | 湖北建巨市政建设有限公司 | Graded broken stone production method based on building |
| CN116037293A (en) * | 2023-02-08 | 2023-05-02 | 中电建十一局工程有限公司 | Short-flow high-quality machine-made sand processing technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100159247A1 (en) * | 2007-09-04 | 2010-06-24 | Kotobuki Engineering & Manufacturing Co., Ltd. | Sand making apparatus, sand making method, and made sand |
| CN206801120U (en) * | 2017-05-24 | 2017-12-26 | 西安长庆科技工程有限责任公司 | A kind of sludge from far-off regions stacks field |
| CN110102393A (en) * | 2019-05-28 | 2019-08-09 | 韶关核力重工机械有限公司 | Dry-type sand-making production line and dry-type sand-making technique |
| CN110272219A (en) * | 2019-08-08 | 2019-09-24 | 德庆县九市镇德鑫石矿有限公司 | It is a kind of for substituting the manufacturing method of the Machine-made Sand of natural sand |
-
2021
- 2021-04-14 CN CN202110398975.4A patent/CN113171865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100159247A1 (en) * | 2007-09-04 | 2010-06-24 | Kotobuki Engineering & Manufacturing Co., Ltd. | Sand making apparatus, sand making method, and made sand |
| CN206801120U (en) * | 2017-05-24 | 2017-12-26 | 西安长庆科技工程有限责任公司 | A kind of sludge from far-off regions stacks field |
| CN110102393A (en) * | 2019-05-28 | 2019-08-09 | 韶关核力重工机械有限公司 | Dry-type sand-making production line and dry-type sand-making technique |
| CN110272219A (en) * | 2019-08-08 | 2019-09-24 | 德庆县九市镇德鑫石矿有限公司 | It is a kind of for substituting the manufacturing method of the Machine-made Sand of natural sand |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114798148A (en) * | 2022-03-23 | 2022-07-29 | 湖北建巨市政建设有限公司 | Graded broken stone production method based on building |
| CN116037293A (en) * | 2023-02-08 | 2023-05-02 | 中电建十一局工程有限公司 | Short-flow high-quality machine-made sand processing technology |
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Application publication date: 20210727 |
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