CN116393242A - Quartz sand deep purification method - Google Patents
Quartz sand deep purification method Download PDFInfo
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- CN116393242A CN116393242A CN202310299023.6A CN202310299023A CN116393242A CN 116393242 A CN116393242 A CN 116393242A CN 202310299023 A CN202310299023 A CN 202310299023A CN 116393242 A CN116393242 A CN 116393242A
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- flotation
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000006004 Quartz sand Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000000746 purification Methods 0.000 title claims abstract description 13
- 238000005188 flotation Methods 0.000 claims abstract description 53
- 238000005201 scrubbing Methods 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 12
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 12
- 238000007885 magnetic separation Methods 0.000 claims abstract description 12
- 239000011707 mineral Substances 0.000 claims abstract description 12
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims abstract description 7
- 239000012752 auxiliary agent Substances 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 38
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000002270 dispersing agent Substances 0.000 claims description 7
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
- 239000004576 sand Substances 0.000 claims 3
- 125000003916 ethylene diamine group Chemical group 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 13
- 239000012535 impurity Substances 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract 2
- 238000002360 preparation method Methods 0.000 abstract 1
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 description 12
- 239000002245 particle Substances 0.000 description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 6
- 239000010453 quartz Substances 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- -1 casting Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000010423 industrial mineral Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 229910021422 solar-grade silicon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/002—Inorganic compounds
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/01—Organic compounds containing nitrogen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/007—Modifying reagents for adjusting pH or conductivity
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a quartz sand deep purification method, which belongs to the technical field of quartz sand mineral processing, and comprises the steps of crushing raw ore, screening, scrubbing, ultrasonic cleaning, desliming, classifying, floatation, drying, magnetic separation and the like, wherein a scrubbing auxiliary agent is added during scrubbing, then ultrasonic cleaning is carried out, the ultrasonic cleaning can further remove impurities on the surface of the ore,during flotation, three stages of flotation are used to remove iron impurities as much as possible, so that SiO is promoted 2 The content of (2) is carried out in a fluoride-free floatation mode, acid washing and hydrofluoric acid are not adopted, compared with the traditional preparation method of low-iron quartz sand, the acid consumption is greatly reduced, the sewage treatment difficulty is reduced, and the method has good environmental protection significance.
Description
Technical Field
The invention relates to the technical field of quartz sand mineral processing, in particular to a quartz sand deep purification method.
Background
The quartz sand is quartz particles formed by crushing and processing quartz stone. Quartz stone is a nonmetallic mineral, and is a silicate mineral with hardness, wear resistance and stable chemical property. The quartz sand is milky white or colorless semitransparent, and has a mohs hardness of 7. Quartz sand is an important industrial mineral raw material and is not a chemical dangerous article, and is widely used in industries such as glass, casting, ceramics and fireproof materials, smelting ferrosilicon, metallurgical flux, metallurgy, construction, chemical industry, plastics, rubber, abrasive materials, filter materials and the like.
Currently, the high-tech industry has very strict requirements on the purity of quartz sand, such as the manufacture of crucibles for producing solar grade silicon in the photovoltaic industry and the production of optical fibers. Along with the progress of technology, the demand for high-purity quartz sand is increasing, and the demand for the purity of the quartz sand is also increasing. There are many methods for purifying quartz sand, but most of them are not environment-friendly, so it is necessary to provide a method for purifying quartz sand in an environment-friendly manner.
Disclosure of Invention
The invention provides a quartz sand deep purification method, which aims to solve the technical problems in the background technology.
The aim of the invention can be achieved by the following technical scheme:
the quartz sand deep purification method specifically comprises the following steps:
step S1: taking natural quartz sand raw ore as a raw material, and measuring components; crushing and grinding the quartz sand raw ore, and screening by using a 20-30 mesh screen to obtain undersize S1;
step S2: rubbing the particles of the undersize product S1 with each other in a scrubbing mode to remove an iron oxide film on the surface, adding scrubbing aids such as sodium oleate and the like at the same time to increase the electric repulsive force of the surfaces of impurity minerals and quartz particles, separating and removing clay, plant scraps, worms and the like mixed in the mixture, and then performing ultrasonic cleaning to remove moisture to obtain a material S2; when the crushing head of ultrasonic wave is used for acting on the liquid, the interior of the liquid is changed to generate pressure or tensile force, when the tensile force reaches a certain strength, cavitation is generated to cause countless small bubbles, and the pressure of the bubbles is reduced along with the compression of ultrasonic vibration; when the bubbles reach a critical dimension, the bubbles will collapse, generating huge pressure, and carrying out violent impact on solid particles in the liquid, and under the violent impact, trace impurities or hydration films on the surfaces of the particles are rapidly peeled off from the surfaces of the materials;
step S3: adding the material S2 and a dispersing agent into a vibrating screen for desliming treatment, and washing twice with clear water after desliming to obtain a material S3;
step S4: classifying the material S3, selecting a screen with 200 meshes, and classifying to obtain a oversize material S4;
step S5: carrying out three-stage flotation on the oversize product S4;
and (3) first-stage flotation: adding water to adjust the pulp until the volume fraction of the pulp is 30%, then adjusting the pH value of the pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.5-2.5kg/t, and carrying out flotation to obtain primary flotation;
two-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collecting agent dodecyl amine with the dosage of 1.2-2.0kg/t, and carrying out flotation to obtain secondary flotation;
three-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.0-1.8kg/t, and carrying out flotation to obtain tertiary flotation; the multi-stage fluoride-free floatation is adopted to carry out floatation, firstly, non-magnetic accompanying impurity minerals such as feldspar, mica and the like are removed, the content of ferric oxide can be reduced, and meanwhile, the SiO in the material is improved 2 Is contained in the composition;
step S6: magnetic separation, namely drying, magnetic separation, iron removal and drying the material S5 to obtain a quartz sand finished product;
as a further scheme of the invention: in the step S1, an MLA automatic mineral parameter analysis system is adopted for component measurement, and important parameters such as material composition and content of minerals, embedding characteristics of minerals, particle size distribution of minerals, dissociation degree of minerals and the like are subjected to qualitative and quantitative analysis.
As a further scheme of the invention: in the step S2, sodium oleate is adopted as a scrubbing aid.
As a further scheme of the invention: in the step S3, sodium hexametaphosphate is used as a dispersing agent for desliming.
As a further scheme of the invention: the drying temperature in the step S6 is 120-200 DEG C
As a further scheme of the invention: the magnetic field intensity of the magnetic separation in the step S6 is 1.0-1.2T.
Compared with the prior art, the method has the following beneficial effects: according to the invention, quartz sand is purified through multiple steps of crushing, screening, scrubbing, ultrasonic cleaning, desliming, grading, floatation and magnetic separation of quartz sand, wherein a scrubbing aid is added to increase the electric repulsive force between impurity minerals and the surfaces of quartz particles during scrubbing, clay, plant scraps, worms and the like mixed in the quartz sand are separated and removed, then ultrasonic cleaning is carried out, the impurities on the surfaces of the ores are further removed through ultrasonic cleaning, during floatation, three-stage floatation is used to remove iron impurities as much as possible, the content of silicon dioxide is improved, and a fluoride-free floatation mode is used, acid washing is not adopted, acid consumption is greatly reduced, sewage treatment difficulty is reduced, the method has good environmental protection significance, grading is arranged in the middle, and finally obtained quartz sand is good in quality and high in purity.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A quartz sand deep purification method comprises the following steps:
step S1: taking natural quartz sand raw ore as a raw material, and measuring components; crushing and grinding the quartz sand raw ore, and screening by using a 20-mesh screen to obtain undersize S1;
step S2: scrubbing S1, wherein the scrubbing concentration is 60 percent (quartz sand and water); adding sodium oleate during scrubbing, then performing ultrasonic cleaning, and removing water to obtain a material S2;
step S3: adding the material S2 and a dispersing agent into a vibrating screen for desliming treatment, and washing twice with clear water after desliming to obtain a material S3;
step S4: classifying the material S3, selecting a screen with 200 meshes, and classifying to obtain a oversize material S4;
step S5: carrying out three-stage flotation on the oversize product S4;
and (3) first-stage flotation: adding water to adjust the pulp until the volume fraction of the pulp is 30%, then adjusting the pH value of the pulp to 2 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.5kg/t, and carrying out flotation to obtain primary flotation;
two-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.2kg/t, and carrying out flotation to obtain secondary flotation;
three-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.0kg/t, and carrying out flotation to obtain a third flotation, thus obtaining a material S5;
step S6: and (3) carrying out magnetic separation under the condition that the magnetic field intensity is 1.0T, drying, magnetic separation, iron removal and drying at the temperature of 200 ℃ are carried out on the material S5, and thus a quartz sand finished product is obtained.
Example 2
A quartz sand deep purification method comprises the following steps:
step S1: taking natural quartz sand raw ore as a raw material, and measuring components; crushing and grinding the quartz sand raw ore, and screening by using a 30-mesh screen to obtain an undersize product S1;
step S2: scrubbing S1, wherein the scrubbing concentration is 60 percent (quartz sand and water); adding sodium oleate during scrubbing, then performing ultrasonic cleaning, and removing water to obtain a material S2;
step S3: adding the material S2 and a dispersing agent into a vibrating screen for desliming treatment, and washing twice with clear water after desliming to obtain a material S3;
step S4: classifying the material S3, selecting a screen with 200 meshes, and classifying to obtain a oversize material S4;
step S5: carrying out three-stage flotation on the oversize product S4;
and (3) first-stage flotation: adding water to adjust the pulp until the volume fraction of the pulp is 30%, then adjusting the pH value of the pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collecting agent dodecyl amine with the dosage of 2kg/t, and carrying out flotation to obtain primary flotation;
two-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.60kg/t, and carrying out flotation to obtain secondary flotation;
three-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.4kg/t, and carrying out flotation to obtain a third flotation, thus obtaining a material S5;
step S6: and (3) carrying out magnetic separation under the magnetic field intensity of 1.1T, drying, magnetic separation, iron removal and drying at the temperature of 150 ℃ to obtain a quartz sand finished product.
Example 3
A quartz sand deep purification method comprises the following steps:
step S1: taking natural quartz sand raw ore as a raw material, and measuring components; crushing and grinding the quartz sand raw ore, and screening by using a 30-mesh screen to obtain an undersize product S1;
step S2: scrubbing S1, wherein the scrubbing concentration is 60 percent (quartz sand and water); adding sodium oleate during scrubbing, then performing ultrasonic cleaning, and removing water to obtain a material S2;
step S3: adding the material S2 and a dispersing agent into a vibrating screen for desliming treatment, and washing twice with clear water after desliming to obtain a material S3;
step S4: classifying the material S3, selecting a screen with 200 meshes, and classifying to obtain a oversize material S4;
step S5: carrying out three-stage flotation on the oversize product S4;
and (3) first-stage flotation: adding water to adjust the pulp until the volume fraction of the pulp is 30%, then adjusting the pH value of the pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collecting agent dodecyl amine with the dosage of 2.5kg/t, and carrying out flotation to obtain primary flotation;
two-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collecting agent dodecyl amine with the dosage of 2.0kg/t, and carrying out flotation to obtain secondary flotation;
three-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 3 by using sulfuric acid with the mass fraction of 10%, adding a collector dodecyl amine with the dosage of 1.8kg/t, and carrying out flotation to obtain a third flotation, thus obtaining a material S5;
step S6: and (3) carrying out magnetic separation under the condition that the magnetic field intensity is 1.2T, drying, magnetic separation, iron removal and drying at the temperature of 120 ℃ to obtain a quartz sand finished product.
The quartz sand finished products obtained in examples 1 to 3 were measured to obtain the results shown in the following table:
as can be seen from the above table, the quartz sand purified in examples 1-3 has good purity and quality.
It should be noted that while the embodiments of the present invention have been shown and described herein, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made hereto without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (8)
1. The quartz sand deep purification method is characterized by comprising the following steps of:
step S1: crushing and grinding quartz sand raw ore, and screening by using a 20-30 mesh screen to obtain undersize S1;
step S2: scrubbing the undersize S1, adding an auxiliary agent while scrubbing, then performing ultrasonic cleaning, and removing water to obtain a material S2;
step S3: adding the material S2 and a dispersing agent into a vibrating screen for desliming treatment, and washing twice with clear water after desliming to obtain a material S3;
step S4: classifying the material S3 to obtain a oversize material S4;
step S5: carrying out three-stage flotation on the oversize material S4 to obtain a material S5;
step S6: and drying, magnetically separating, deironing and drying the material S5 to obtain a quartz sand finished product.
2. The method according to claim 1, wherein the determination of the components in the step S1 is performed by using an MLA automatic mineral parameter analysis system.
3. The method for deeply purifying quartz sand according to claim 1, wherein the scrubbing in the step S2 is performed by a scrubbing machine, and the auxiliary agent sodium oleate is added during the scrubbing.
4. The method for deeply purifying silica sand according to claim 1, wherein the dispersant in the step S3 is sodium hexametaphosphate.
5. The method for deep purification of silica sand according to claim 1, wherein the screen classified in step S4 is selected to be 140 to 200 mesh.
6. The quartz sand deep purification method according to claim 1, wherein the three-stage flotation comprises the following specific steps:
and (3) first-stage flotation: adding water to adjust the pulp until the volume fraction of the pulp is 30%, then adjusting the pH value of the pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collector with the dosage of 1.5-2.5kg/t, and carrying out flotation to obtain primary flotation;
two-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collector with the dosage of 1.2-2.0kg/t, and carrying out flotation to obtain secondary flotation;
three-stage flotation: adding water to adjust the concentration to 20%, then adjusting the pH value of the ore pulp to 2-3 by using sulfuric acid with the mass fraction of 10%, adding a collector with the dosage of 1.0-1.8kg/t, and carrying out flotation to obtain the tertiary flotation.
7. The method for deep purification of silica sand according to claim 6, wherein the collector is ethylenediamine.
8. The method for deeply purifying quartz sand according to claim 1, wherein the magnetic field intensity of the magnetic separation in the step S6 is 1.0-1.2T.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310299023.6A CN116393242A (en) | 2023-03-24 | 2023-03-24 | Quartz sand deep purification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310299023.6A CN116393242A (en) | 2023-03-24 | 2023-03-24 | Quartz sand deep purification method |
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| CN116393242A true CN116393242A (en) | 2023-07-07 |
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| CN202310299023.6A Pending CN116393242A (en) | 2023-03-24 | 2023-03-24 | Quartz sand deep purification method |
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- 2023-03-24 CN CN202310299023.6A patent/CN116393242A/en active Pending
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