CN110813488A - Selective crushing processing technology for silica sand - Google Patents
Selective crushing processing technology for silica sand Download PDFInfo
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- CN110813488A CN110813488A CN201911052282.9A CN201911052282A CN110813488A CN 110813488 A CN110813488 A CN 110813488A CN 201911052282 A CN201911052282 A CN 201911052282A CN 110813488 A CN110813488 A CN 110813488A
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- magnetic separation
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- silica sand
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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
- B02C1/00—Crushing or disintegrating by reciprocating members
- B02C1/02—Jaw crushers or pulverisers
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/14—Edge runners, e.g. Chile mills
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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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention relates to the technical field of silica sand, and discloses a selective crushing processing technology of silica sand, which comprises the following processing steps: step 1) ore grinding: screening raw ores by bars, directly feeding small blocks into a storage bin, crushing large blocks and then feeding the large blocks into the storage bin to obtain primary crushed materials; step 2) screening and wheel milling: introducing water, and sieving the primary crushed material for one time to obtain fine materials, wherein the fine materials are less than 2 mm; step 3), desliming and grading: after the primary screening material is subjected to desliming treatment twice, screening material is obtained; grading the screened material to obtain a graded material; carrying out desliming treatment on the classified material with the particle size larger than 0.125mm again to obtain magnetic separation tailings; step 4), magnetic separation and dehydration: and carrying out magnetic separation treatment on the magnetic separation tailings to obtain a magnetic separation material, and then carrying out dehydration treatment on the magnetic separation material to obtain the refined sand for float glass. The silica sand prepared by the method has the advantages of low mud content, high recovery rate, concentrated granularity, good quality of silica sand particles and stable physical and chemical properties, and meets the requirement of subsequent high-quality processing.
Description
Technical Field
The invention relates to the technical field of silica sand, in particular to a selective crushing processing technology of silica sand.
Background
Silica sand, also known as quartz sand, is made of quartz as main mineralRefractory particles with the particle size of 0.020mm-3.350mm are separated. Silica sand is a hard, wear-resistant and chemically stable silicate mineral, the main mineral component of which is SiO2As an important industrial mineral raw material, it is widely used in industries such as glass, casting, ceramics and refractories, metallurgy, construction, chemical engineering, plastics, rubber, abrasives, and the like.
However, in the prior art, the silica sand with excellent comprehensive performance has complex preparation process and high cost; silica sand with simple preparation process has more quality problems, such as high mud content, low recovery rate, dispersed granularity, poor silica sand particle quality, unstable physical and chemical properties and the like, and influences the further processing and using effects of the silica sand. Therefore, a silica sand selective crushing processing technology with simple processing technology and high product quality is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a silica sand selective crushing processing technology which is simple in processing technology, high in efficiency and low in cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the selective crushing processing technology for the silica sand is characterized by comprising the following processing steps:
step 1) ore grinding: screening raw ores by bars, directly feeding small blocks into a stock bin, crushing large blocks and then feeding the large blocks into the stock bin to obtain primary crushed materials; the small lump material is less than 50mm, and the large lump material is more than or equal to 50 mm;
step 2) screening and wheel milling: introducing water, and sieving the primary crushed material for the first time to obtain fine materials, wherein the fine materials are less than 2 mm; the fine material is screened secondarily to obtain primary screened material, and the primary screened material is smaller than 24 meshes;
the crushed materials with the particle size of more than 2mm in the primary screening and more than 24 meshes in the secondary screening enter an edge runner mill for edge runner milling, and are subjected to secondary screening again, so that the primary screening material with the particle size meeting the requirement is obtained through circular processing;
step 3), desliming and grading: after the primary screening material is subjected to desliming treatment twice, screening material is obtained; grading the screened material to obtain a graded material;
wherein, the classified material with the grain diameter less than or equal to 0.125mm is dehydrated to obtain classified fine sand; carrying out desliming treatment on the classified material with the particle size larger than 0.125mm again to obtain magnetic separation tailings;
step 4), magnetic separation and dehydration: and carrying out magnetic separation treatment on the magnetic separation tailings to obtain a magnetic separation material, and then carrying out dehydration treatment on the magnetic separation material to obtain the refined sand for float glass.
As a preferred embodiment, the particle size of the raw ore in the step 1) is less than or equal to 300 mm.
As a preferred embodiment, the crushing in step 1) is performed using a jaw crusher.
As a preferred embodiment, the discharge opening of the jaw crusher: e is less than or equal to 40 mm.
As a preferred implementation mode, the water quantity of the water passing in the step 2) is 380-400m3/h。
In a preferred embodiment, the magnetic separation treatment in step 4) is performed by using a high-intensity magnetic separator.
By adopting the technical scheme, the method can prevent over-crushing of raw ores, multi-stage screening and wheel grinding ball granulation through selective crushing, ensures the processing granularity, improves the processing efficiency, can directly enter the next procedure for materials meeting the particle size requirement, avoids repeated processing and reduces the production cost; after further desliming, controlling the particle size, dehydrating the material with small particle size to obtain a graded fine sand product, and further desliming the material with larger particle size to obtain a magnetic separation tailing product; and (4) further carrying out magnetic separation and dehydration treatment on the magnetic separation tailings to obtain a refined sand product for float glass. The silica sand prepared by the method has low mud content, can obtain products of various specifications according to requirements, has high recovery rate, concentrated silica sand product granularity, good particle quality and stable physical and chemical properties, meets the subsequent high-quality processing requirements, and has the advantages of simple processing technology, high processing efficiency and reduced production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a process flow diagram of a silica sand selective crushing process of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention is further explained by combining the attached drawings, so that the technical personnel in the technical field can better implement the invention, and the process for selectively crushing the silica sand comprises the following processing steps:
step 1) ore grinding: screening raw ores by bars, directly feeding small blocks into a bin, crushing large blocks and then feeding the large blocks into the bin, and preventing the raw ores from being excessively crushed by a selective crushing mode to obtain primary crushed materials; the small lump material is less than 50mm, and the large lump material is more than or equal to 50 mm;
step 2) screening and wheel milling: introducing water, and sieving the primary crushed material for one time to obtain fine materials, wherein the fine materials are less than 2 mm; the fine material is screened secondarily to obtain primary screened material, and the primary screened material is smaller than 24 meshes;
wherein, the crushed materials with the particle size of more than 2mm in the primary screening and more than 24 meshes in the secondary screening enter an edge runner mill for edge runner milling, and are subjected to secondary screening again, and the circular processing is carried out until the primary screened materials with the particle size meeting the requirements are obtained; and (4) multi-stage screening and wheel milling ball granulation are carried out to ensure the processing granularity.
In the crushing and screening processes, materials meeting the particle size requirement can directly enter the next process, so that the processing efficiency is improved, repeated processing is avoided, and the production cost is reduced.
Step 3), desliming and grading: after the primary screening material is subjected to desliming treatment twice, screening material is obtained; grading the screened material to obtain a graded material;
wherein, the classified material with the grain diameter less than or equal to 0.125mm is dehydrated to obtain classified fine sand; carrying out desliming treatment on the classified material with the particle size larger than 0.125mm again to obtain magnetic separation tailings;
by controlling the particle size, various products with different specifications can be obtained, and the recovery rate is high.
Step 4), magnetic separation and dehydration: and carrying out magnetic separation treatment on the magnetic separation tailings to obtain a magnetic separation material, and then carrying out dehydration treatment on the magnetic separation material to obtain the refined sand for float glass. After further processing, another product with higher quality is obtained.
By adopting the technical scheme, the method can prevent over-crushing of raw ores, multi-stage screening and wheel grinding ball granulation through selective crushing, ensures the processing granularity, improves the processing efficiency, can directly enter the next procedure for materials meeting the particle size requirement, avoids repeated processing and reduces the production cost; after further desliming, controlling the particle size, dehydrating the material with small particle size to obtain a graded fine sand product, and further desliming the material with larger particle size to obtain a magnetic separation tailing product; and (4) further carrying out magnetic separation and dehydration treatment on the magnetic separation tailings to obtain a refined sand product for float glass. The silica sand prepared by the method has low mud content, can obtain products of various specifications according to requirements, has high recovery rate, concentrated silica sand product granularity, good particle quality and stable physical and chemical properties, meets the subsequent high-quality processing requirements, and has the advantages of simple processing technology, high processing efficiency and reduced production cost.
The invention also provides a silica sand selective crushing processing technology, which comprises the following processing steps:
step 1) ore grinding: the raw ore is subjected to bar screening, the particle size of the raw ore is less than or equal to 300mm, the size of the raw ore is reasonably controlled, the waste of energy for processing is reduced, and the processing cost is effectively controlled.
The small material directly enters the stock bin, the large material enters the stock bin after being crushed, and the crushing is carried out by adopting a jaw crusher.
The working part of the jaw crusher is two jaw plates, one is a fixed jaw plate (fixed jaw), the fixed jaw plate is vertically (or the upper end of the fixed jaw plate is slightly outwards inclined) fixed on the front wall of the crusher body, and the other is a movable jaw plate (movable jaw), the position of the movable jaw plate is inclined, and the movable jaw plate and the fixed jaw plate form a crushing cavity (working cavity) with a large upper part and a small lower part. The movable jaw is periodically reciprocated, away from and towards the fixed jaw. When the materials are separated, the materials enter the crushing cavity, and finished products are discharged from the lower part; when approaching, the material between the two jaws is squeezed, bent and split to be broken.
The jaw crusher has the advantages of low noise, less dust, large crushing ratio, uniform product granularity, accordance with the further processing requirement of the product, safe and reliable jaw crusher lubricating system, convenient part replacement, simple equipment maintenance, simple whole machine structure, reliable work and low operation cost. The colleague of the processing effect can be ensured, and the processing and production cost can be effectively controlled.
The ore discharge opening of the jaw crusher in the embodiment of the invention is set to be e less than or equal to 40mm so as to meet the requirement of further processing particle size of silica sand.
And the over-crushing of the raw ore is prevented by a selective crushing mode to obtain primary crushed materials; the small lump material is less than 50mm, and the large lump material is more than or equal to 50 mm;
step 2) screening and wheel milling: water is introduced, the water quantity is controlled to be 380-3H, preferably a flow rate of 388.34m3And h, the waste of water resources is reduced while the processing effect is ensured.
Sieving the primary crushed material for one time to obtain fine materials, wherein the fine materials are less than 2 mm; the fine material is screened secondarily to obtain primary screened material, and the primary screened material is smaller than 24 meshes; and multi-stage screening is carried out, so that the particle size requirement is ensured, and the particle size concentration of the product is ensured.
Wherein, the crushed materials with the particle size of more than 2mm in the primary screening and more than 24 meshes in the secondary screening enter an edge runner mill for edge runner milling, and are subjected to secondary screening again, and the circular processing is carried out until the primary screened materials with the particle size meeting the requirements are obtained; and (4) multi-stage screening and wheel milling ball granulation are carried out to ensure the processing granularity.
In the crushing and screening processes, materials meeting the particle size requirement can directly enter the next process, so that the processing efficiency is improved, repeated processing is avoided, and the production cost is reduced.
Step 3), desliming and grading: after the primary screening material is subjected to desliming treatment twice, screening material is obtained; and (4) grading the screened material to obtain a graded material with low mud content.
Wherein, the classified material with the grain diameter less than or equal to 0.125mm is dehydrated to obtain classified fine sand; carrying out desliming treatment on the classified material with the particle size larger than 0.125mm again to obtain magnetic separation tailings; by controlling the particle size, various products with different specifications can be obtained, and the recovery rate is high.
Step 4), magnetic separation and dehydration: and (3) carrying out magnetic separation treatment on the magnetic separation tailings, wherein a high-intensity magnetic separator is adopted for the magnetic separation treatment, and the magnetic field intensity is more than 10000 Gauss.
The main mineral in silica sand, quartz, is a diamagnetic substance and cannot be magnetized in a magnetic field. And the iron-containing impurity minerals in the silica sand: hematite, limonite, magnetite, goethite, etc., most of which are magnetic substances, can be magnetized in a magnetic field. The magnetic separation process utilizes the difference in property to remove the iron-containing impurity minerals in the silica sand through magnetic separation. The more the magnetic separation times are, the finer the granularity of the quartz sand is, and the better the iron removal effect is. Therefore, the magnetic separation times can be reasonably adapted according to requirements, and the product quality is improved.
After magnetic separation, a magnetic separation material is obtained, then the magnetic separation material is dehydrated to obtain refined sand for float glass, and the refined sand is further processed to obtain another product with higher quality.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. The selective crushing processing technology for the silica sand is characterized by comprising the following processing steps:
step 1) ore grinding: screening raw ores by bars, directly feeding small blocks into a stock bin, crushing large blocks and then feeding the large blocks into the stock bin to obtain primary crushed materials; the small lump material is less than 50mm, and the large lump material is more than or equal to 50 mm;
step 2) screening and wheel milling: introducing water, and sieving the primary crushed material for the first time to obtain fine materials, wherein the fine materials are less than 2 mm; the fine material is screened secondarily to obtain primary screened material, and the primary screened material is smaller than 24 meshes; the crushed materials with the particle size of more than 2mm in the primary screening and more than 24 meshes in the secondary screening enter an edge runner mill for edge runner milling, and are subjected to secondary screening again, so that the primary screening material with the particle size meeting the requirement is obtained through circular processing;
step 3), desliming and grading: after the primary screening material is subjected to desliming treatment twice, screening material is obtained; grading the screened material to obtain a graded material; wherein, the classified material with the grain diameter less than or equal to 0.125mm is dehydrated to obtain classified fine sand; carrying out desliming treatment on the classified material with the particle size larger than 0.125mm again to obtain magnetic separation tailings;
step 4), magnetic separation and dehydration: and carrying out magnetic separation treatment on the magnetic separation tailings to obtain a magnetic separation material, and then carrying out dehydration treatment on the magnetic separation material to obtain the refined sand for float glass.
2. The silica sand selective crushing processing technology according to claim 1, characterized in that: the grain diameter of the raw ore in the step 1) is less than or equal to 300 mm.
3. The silica sand selective crushing processing technology according to claim 1, characterized in that: the crushing in the step 1) is carried out by adopting a jaw crusher.
4. The silica sand selective fracturing processing technology of claim 3, wherein: the discharge hole of the jaw crusher: e is less than or equal to 40 mm.
5. The silica sand selective crushing processing technology according to claim 1, characterized in that: the water quantity of the water in the step 2) is 380-3/h。
6. The silica sand selective crushing processing technology according to claim 1, characterized in that: and 4) adopting a high-intensity magnetic separator for magnetic separation treatment in the step 4).
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| CN201911052282.9A CN110813488A (en) | 2019-10-31 | 2019-10-31 | Selective crushing processing technology for silica sand |
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| CN201911052282.9A CN110813488A (en) | 2019-10-31 | 2019-10-31 | Selective crushing processing technology for silica sand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114042522A (en) * | 2021-12-14 | 2022-02-15 | 石门县中天矿业有限责任公司 | Glass silica sand production system and method |
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| CN102701223A (en) * | 2012-06-05 | 2012-10-03 | 田辉明 | Method for producing high-purity quartz sand with high-temperature chlorination process and chlorination device |
| CN204194284U (en) * | 2014-10-29 | 2015-03-11 | 烟台红旗瑞弘建材有限公司 | A kind of closed cycle sand system |
| CN105498928A (en) * | 2015-12-29 | 2016-04-20 | 安徽牛山新型材料科技有限公司 | Equipment system for processing and utilization of low-grade sandstone |
| CN107213976A (en) * | 2017-07-14 | 2017-09-29 | 望江县金峰矿产品科技有限公司 | A kind of circulating quartz sand screening installation |
| CN207385667U (en) * | 2017-08-31 | 2018-05-22 | 陕西冶金设计研究院有限公司 | A kind of production process equipment of railway superfine rubble railway ballast |
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| CN109174410A (en) * | 2018-09-05 | 2019-01-11 | 凯盛石英材料（黄山）有限公司 | A kind of method that granite feldspar ore produces low iron-stone sand |
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2019
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| NL7810262A (en) * | 1977-10-13 | 1979-04-18 | Simmering Graz Pauker Ag | METHOD AND APPARATUS FOR PREPARING ACTIVATED MIXTURES OF MINERAL COMPONENTS. |
| CN102701223A (en) * | 2012-06-05 | 2012-10-03 | 田辉明 | Method for producing high-purity quartz sand with high-temperature chlorination process and chlorination device |
| CN204194284U (en) * | 2014-10-29 | 2015-03-11 | 烟台红旗瑞弘建材有限公司 | A kind of closed cycle sand system |
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| CN107213976A (en) * | 2017-07-14 | 2017-09-29 | 望江县金峰矿产品科技有限公司 | A kind of circulating quartz sand screening installation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114042522A (en) * | 2021-12-14 | 2022-02-15 | 石门县中天矿业有限责任公司 | Glass silica sand production system and method |
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