CN110697722A - Silica sand preparation process - Google Patents
Silica sand preparation process Download PDFInfo
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- CN110697722A CN110697722A CN201911052288.6A CN201911052288A CN110697722A CN 110697722 A CN110697722 A CN 110697722A CN 201911052288 A CN201911052288 A CN 201911052288A CN 110697722 A CN110697722 A CN 110697722A
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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Abstract
The invention relates to the technical field of silica sand, and discloses a silica sand preparation process, which comprises the following steps: step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm; step 2), sand making: adding the crushed materials in the step 1) into a sand making machine for making sand, screening and screening the sand by a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand; step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, screening and screening through an 8-10-mesh sieve after grinding, and performing desliming treatment to obtain screening powder sand; step 4), magnetic separation: adding the screened silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand. The preparation process is simple in operation flow, improves the processing efficiency, and the silica sand prepared by the process is high in purity, concentrated in granularity and high in grade, and meets the requirements of users on the physical and chemical properties of high-purity and high-precision silica sand.
Description
Technical Field
The invention relates to the technical field of silica sand, in particular to a silica sand preparation process.
Background
Silica sand, also known as quartz sand, is a refractory particulate material with quartz as a main mineral component and a particle size of 0.020mm to 3.350 mm. 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.
The high-precision silica sand with high purity has good physicochemical properties, and is applied to a plurality of high-precision industries, such as electronics, IT, national defense and the like. With the continuous development of science and technology, the demand of high-purity and high-precision silica sand is increasing. In the prior art, the processing of high-purity and high-precision silica sand is complex in process, low in efficiency and high in cost. Therefore, a silica sand preparation process with simple operation and high processing efficiency is needed.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a silica sand preparation process, which is simple in operation flow, improves the processing efficiency, reduces the production cost, has high purity, concentrated granularity and high grade, and meets the requirements of users on the physical and chemical properties of high-purity and high-precision silica sand.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a silica sand preparation process is characterized by comprising the following steps:
step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm;
step 2), sand making: adding the crushed material in the step 1) into a sand making machine for making sand, screening and screening the sand through a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand;
step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, screening and screening through a 8-10-mesh sieve after grinding, and performing desliming treatment to obtain screening powder sand;
step 4), magnetic separation: adding the sieved silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand;
step 5), cleaning and dehydrating: cleaning the magnetic separation sand in the step 4), and dehydrating to obtain a semi-finished product;
step 6), drying: and (5) drying the semi-finished product in the step 5) to obtain a finished product.
As a preferred embodiment, the pulverization in step 1) is performed in a multi-stage pulverization manner.
As a preferred embodiment, the multi-stage pulverization includes coarse pulverization and fine pulverization.
In a preferred embodiment, the coarse crushing is performed by a jaw crusher, and the fine crushing is performed by a counterimpact crusher.
As a preferred embodiment, the magnetic separation in step 4) is repeated a plurality of times.
As a preferred embodiment, the magnetic separation in step 4) is performed by using a strong magnetic separator.
As a preferred implementation mode, the magnetic field intensity of the strong magnetic separator is set to 15000 and 16000 gauss.
As a preferred embodiment, the cleaning process in step 5) uses deionized water.
In a preferred embodiment, the cleaning treatment in step 5) is performed using an ultrasonic cleaning apparatus.
As a preferred embodiment, the temperature of the drying treatment in step 6) is set to 400 ℃ and the drying time is 2-3 hours.
By adopting the technical scheme, the raw ore is subjected to the technological processes of crushing, sand making, wheel milling, magnetic separation, cleaning, dehydration and drying to prepare the silica sand, and the production line operation is realized, so that the process is simple, the operation flow is simple, the processing efficiency is improved, and the production cost is reduced; the silica sand prepared by the process is subjected to the processing procedures of sand making, wheel milling, multi-stage screening, multi-stage desliming, magnetic separation and cleaning, has high purity, concentrated granularity and high grade, and meets the requirement of a user on the physical and chemical properties of the high-purity and high-precision silica sand.
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 preparation 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.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "multiple times" means at least two times, e.g., two times, three times, etc., unless specifically limited otherwise.
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 preparing the silica sand comprises the following steps:
step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm; the raw ore is cleaned and then processed, so that the generation of silt and impurities is reduced, the screening and purification treatment of later-stage silica sand is facilitated, and the processing efficiency is improved.
Step 2), sand making: adding the crushed materials in the step 1) into a sand making machine for making sand, screening and screening the sand by a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand; the sieved material with larger particle size is returned to the sand making machine until the produced material meets the particle size requirement.
Step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, screening and screening through an 8-10-mesh sieve after grinding, and performing desliming treatment to obtain screening powder sand; returning the sieved materials with larger particle size to the wheel mill until the produced materials meet the particle size requirement.
Step 4), magnetic separation: adding the sieved silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand; recovering magnetic separation mineral impurities for other uses.
Step 5), cleaning and dehydrating: cleaning the magnetic separation sand in the step 4), and dehydrating to obtain a semi-finished product;
step 6), drying: and (5) drying the semi-finished product in the step 5) to obtain a finished product.
By adopting the technical scheme, the raw ore is subjected to the technological processes of crushing, sand making, wheel milling, magnetic separation, cleaning, dehydration and drying to prepare the silica sand, and the production line operation is realized, so that the process is simple, the operation flow is simple, the processing efficiency is improved, and the production cost is reduced; the silica sand prepared by the process is subjected to the processing procedures of sand making, wheel milling, multi-stage screening, multi-stage desliming, magnetic separation and cleaning, has high purity, concentrated granularity and high grade, and meets the requirement of a user on the physical and chemical properties of the high-purity and high-precision silica sand.
Another embodiment of the present invention provides a silica sand preparation process, including the steps of:
step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm; the raw ore is cleaned and then processed, so that the generation of silt and impurities is reduced, the screening and purification treatment of later-stage silica sand is facilitated, and the processing efficiency is improved.
The crushing adopts a multi-stage crushing mode, the multi-stage crushing comprises coarse crushing and fine crushing, the coarse crushing adopts a jaw crusher, and the fine crushing adopts an impact crusher.
The particle size of the raw ore is less than 200mm, the raw ore is crushed to be less than 50mm in the coarse crushing process, and the crushed material with the required particle size is obtained after further fine crushing.
Step 2), sand making: adding the crushed materials in the step 1) into a sand making machine for making sand, screening and screening the sand by a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand; the sieved material with larger particle size is returned to the sand making machine until the produced material meets the particle size requirement.
Step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, grinding balls by the wheel mill, screening and screening the ground sand by an 8-10-mesh sieve, and performing desliming treatment to obtain screening powder sand; returning the sieved materials with larger particle size to the wheel mill until the produced materials meet the particle size requirement.
Step 4), magnetic separation: adding the sieved silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand; recovering magnetic separation mineral impurities for other uses.
Step 5), cleaning and dehydrating: cleaning the magnetic separation sand in the step 4), and dehydrating to obtain a semi-finished product;
step 6), drying: and (5) drying the semi-finished product in the step 5) to obtain a finished product.
Related equipment and machines among all the steps are connected through conveying equipment such as a feeding machine, a conveying belt, a vibration feeding machine, a drying and conveying machine and the like, so that an automatic production line is formed, and the operation efficiency is guaranteed.
Another embodiment of the present invention provides a silica sand preparation process, including the steps of:
step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm; the raw ore is cleaned and then processed, so that the generation of silt and impurities is reduced, the screening and purification treatment of later-stage silica sand is facilitated, and the processing efficiency is improved.
Step 2), sand making: adding the crushed materials in the step 1) into a sand making machine for making sand, screening and screening the sand by a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand; the sieved material with larger particle size is returned to the sand making machine until the produced material meets the particle size requirement.
Step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, screening and screening through an 8-10-mesh sieve after grinding, and performing desliming treatment to obtain screening powder sand; returning the sieved materials with larger particle size to the wheel mill until the produced materials meet the particle size requirement.
Step 4), magnetic separation: adding the sieved silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand; recovering magnetic separation mineral impurities for other uses.
The magnetic separation is repeated for a plurality of times, such as two times, three times or more, so that the purity of the magnetic separation material can be further improved, and the purity of the silica sand product can be further improved.
The magnetic field intensity of repeated magnetic separation treatment can be gradually increased, the magnetic field intensity can be gradually increased from 8000 Gauss to 16000 Gauss, gradient magnetic separation is formed, and the purity is improved.
Step 5), cleaning and dehydrating: cleaning the magnetic separation sand in the step 4), and dehydrating to obtain a semi-finished product;
step 6), drying: and (5) drying the semi-finished product in the step 5) to obtain a finished product.
In another embodiment of the invention, a strong magnetic separator is used for magnetic separation in the step 4) of the silica sand preparation process, the magnetic field intensity of the strong magnetic separator is set to 15000-16000 gauss, and the high-purity magnetic separation material is obtained by a strong magnetic separation mode.
Another embodiment of the invention provides a silica sand preparation process, wherein deionized water is adopted for cleaning in the step 5), so that the cleaning effect is ensured.
In another embodiment of the invention, an ultrasonic cleaning device is adopted for cleaning in the step 5), so that the cleaning effect is further improved, impurities are removed, and the purity and precision of the silica sand are improved.
Another embodiment of the invention relates to a silica sand preparation process, wherein the temperature of the drying treatment in the step 6) is set to be 300-:
the drying temperature is 300 ℃, and the drying time is 3 hours;
the drying temperature is 400 ℃, and the drying time is 2 hours;
the drying temperature is 350 ℃, and the drying time is 2.5 hours;
the drying temperature is 375 ℃, and the drying time is 2.5 hours.
The silica sand product obtained by the various embodiments has high purity, concentrated granularity and high grade, and meets the requirements of users on the physical and chemical properties of high-purity and high-precision silica sand.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "another embodiment," "a specific example," or "some examples," etc., means 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 (10)
1. A silica sand preparation process is characterized by comprising the following steps:
step 1) crushing: crushing the cleaned raw ore to obtain crushed materials with the particle size less than 10 mm;
step 2), sand making: adding the crushed material in the step 1) into a sand making machine for making sand, screening and screening the sand through a 40-70-mesh sieve after making the sand, and performing desliming treatment to obtain primary screened sand;
step 3) wheel milling: adding the primary screening sand in the step 2) into a wheel mill for grinding treatment, screening and screening through a 8-10-mesh sieve after grinding, and performing desliming treatment to obtain screening powder sand;
step 4), magnetic separation: adding the sieved silt in the step 3) into a magnetic separator for magnetic separation to obtain magnetic separation sand;
step 5), cleaning and dehydrating: cleaning the magnetic separation sand in the step 4), and dehydrating to obtain a semi-finished product;
step 6), drying: and (5) drying the semi-finished product in the step 5) to obtain a finished product.
2. The silica sand preparation process according to claim 1, characterized in that: the crushing in the step 1) adopts a multi-stage crushing mode.
3. The silica sand preparation process according to claim 2, characterized in that: the multi-stage crushing comprises coarse crushing and fine crushing.
4. The silica sand preparation process according to claim 3, characterized in that: the coarse crushing adopts a jaw crusher, and the fine crushing adopts a counterattack crusher.
5. The silica sand preparation process according to claim 1, characterized in that: and 4) repeatedly carrying out the magnetic separation for multiple times in the step 4).
6. The silica sand preparation process according to claim 1, characterized in that: and 4) adopting a strong magnetic separator for magnetic separation in the step 4).
7. The silica sand preparation process according to claim 6, characterized in that: the magnetic field intensity of the strong magnetic separator is set to 15000 and 16000 gauss.
8. The silica sand preparation process according to claim 1, characterized in that: deionized water is adopted for the cleaning treatment in the step 5).
9. The silica sand preparation process according to claim 1, characterized in that: and 5) adopting an ultrasonic cleaning device for cleaning treatment.
10. The silica sand preparation process according to claim 1, characterized in that: the temperature of the drying treatment in the step 6) is set to be 300-400 ℃, and the drying time is 2-3 hours.
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Cited By (3)
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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 |
| CN114436580A (en) * | 2020-10-30 | 2022-05-06 | 贵州成智重工科技有限公司 | Green machine-made aggregate common ultrahigh-performance concrete |
| CN115090396A (en) * | 2022-07-05 | 2022-09-23 | 鄂尔多斯市海川能源科技有限公司 | Fracturing sand vibrations screening system |
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Application publication date: 20200117 |