CN108940569B - Comprehensive utilization method of granite - Google Patents
Comprehensive utilization method of granite Download PDFInfo
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- CN108940569B CN108940569B CN201810745767.5A CN201810745767A CN108940569B CN 108940569 B CN108940569 B CN 108940569B CN 201810745767 A CN201810745767 A CN 201810745767A CN 108940569 B CN108940569 B CN 108940569B
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- 239000010438 granite Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 33
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 81
- 239000011707 mineral Substances 0.000 claims abstract description 81
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000010453 quartz Substances 0.000 claims abstract description 35
- 239000010445 mica Substances 0.000 claims abstract description 28
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 28
- 239000006148 magnetic separator Substances 0.000 claims abstract description 25
- 238000012216 screening Methods 0.000 claims abstract description 15
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims description 54
- 239000010433 feldspar Substances 0.000 claims description 52
- 239000000463 material Substances 0.000 claims description 43
- 238000000926 separation method Methods 0.000 claims description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 239000012141 concentrate Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 12
- 229910052626 biotite Inorganic materials 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 239000011032 tourmaline Substances 0.000 claims description 8
- 229910052613 tourmaline Inorganic materials 0.000 claims description 8
- 229940070527 tourmaline Drugs 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011449 brick Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000004576 sand Substances 0.000 abstract description 5
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 4
- 238000000053 physical method Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000013043 chemical agent Substances 0.000 abstract 1
- 239000012467 final product Substances 0.000 abstract 1
- 239000002562 thickening agent Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 229910001577 potassium mineral Inorganic materials 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004814 ceramic processing Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 229910052892 hornblende Inorganic materials 0.000 description 1
- 229910052651 microcline Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052652 orthoclase Inorganic materials 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
The invention provides a comprehensive utilization method of granite, belonging to the technical field of mineral utilization. The method adopts a two-section crushing-screening closed flow, sand is manufactured by using a vertical impact crusher, a black mica is pre-separated by a strong magnetic roller type magnetic separator, a black quartz coarse ore, a high potassium feldspar ore and a potassium-sodium mixed ore are pre-separated by a color separator, and the separated products are respectively classified and physically purified, so that the obtained final product can meet the requirements of downstream industries. The whole production process adopts a physical method, does not need to add any chemical agent, does not generate any waste, and really achieves green production. The invention fully develops and utilizes various valuable components in granite, improves the comprehensive utilization rate of resources, greatly improves the added value of products, has remarkable social and economic benefits and has wide application prospect in the development and utilization of granite minerals.
Description
Technical Field
The invention relates to the technical field of mineral utilization, in particular to a comprehensive utilization method of granite.
Background
Granite is a landmark rock of continents and a foundation for forming a crust on the continents, so that the reserves of the granite are abundant, most of the granite is still in a state of waiting for development at present due to lack of effective development and utilization, and even if a small part of the granite is developed and utilized, the granite is only selectively cut and ground and used as a foundation stone of roads, a square brick or a step stone of buildings. The products not only have severe environment in the production process, but also have low quality, low price and low added value, cause serious resource waste and form hidden danger to the ecological environment.
Granite, although complex in composition, is mainly composed of quartz, orthoclase and microcline, and other impurity components: hornblende, tourmaline, mica, etc. The utilization and development of single quartz and feldspar minerals are relatively mature in domestic technology, and the research and report of the comprehensive utilization of granite as a mineral are fresh and smelly. The reason for this analysis may be that granite is only a mineral object, compared to quartz, SiO2Insufficient content of K compared with feldspar ore2O、Na2O and Al2O3The content is low, the content of impurities exceeds the standard, and the whiteness can not meet the requirements of downstream products. According to the characteristic that feldspar is the main mineral component, if the conventional method for purifying feldspar ore is adopted and mica is removed by flotation, the high mica content in granite causes high medicament cost and high environmental protection pressure. In addition, the separation of feldspar and quartz is difficult. Therefore, despite the abundant reserves, the domestic research on the comprehensive utilization of granite is still blank.
Quartz, feldspar and mica occupy very important positions in the whole non-metallic ore, the application of the quartz, the feldspar and the mica relates to a plurality of fields such as buildings, ceramics, electronics, aerospace and the like, and if the quartz, the feldspar and the mica in the granite can be effectively separated and respectively enter the respective fields to play advantages, the quartz, the feldspar and the mica are great things benefiting the nation and the people.
Disclosure of Invention
The invention aims to solve the technical problem of providing a comprehensive utilization method of granite, which can effectively separate quartz, feldspar and mica in granite and purify the quartz, the feldspar and the mica in the separation process so as to achieve the aim of comprehensive utilization.
The method specifically comprises the following steps:
(1) carrying out two-stage crushing-screening closed flow on granite to obtain granite particles of 1-4 mm and undersize of-1 mm;
(2) carrying out dry magnetic separation on granite particles with the particle size of 1-4 mm to obtain biotite and magnetic separation tailings;
(3) performing color separation on the magnetic separation tailings to obtain black quartz coarse ores, red feldspar coarse ores and white feldspar coarse ores;
(4) carrying out ore grinding-screening closed-loop flow and hydraulic classifier grading on the black quartz crude ore obtained by color separation in the step (3) by using a rod mill, controlling the granularity of the material to be 40-180 meshes, sequentially removing mechanical iron and strong magnetic minerals through a vertical ring strong magnetic machine, and removing weak magnetic minerals through a vertical ring strong magnetic machine to obtain black quartz concentrate, wherein the weak magnetic minerals and the strong magnetic minerals are combined into a magnetic mineral I;
(5) carrying out color separation on the red feldspar crude ore obtained in the step (3), grinding the red feldspar crude ore by using a ball mill, controlling the granularity of the material to be 60-120 meshes by using a hydraulic classifier and a hindered settler, and screening the material by using a high-frequency vibrating screen after overflow concentration of the hydraulic classifier, wherein the material on the screen is fine-grained mica I, and the material under the screen is fine-grained feldspar I; fine-grained mica I and fine-grained feldspar I are sequentially subjected to vertical ring magnetic separation by virtue of a vertical ring magnetic machine, mechanical iron, strong magnetic minerals, biotite, tourmaline and weak magnetic minerals mixed in the mineral processing process are respectively removed, products subjected to magnetic separation are concentrated, filtered by a belt filter and dried to obtain high-potassium feldspar concentrates, and all magnetic minerals obtained by magnetic separation are combined to form a magnetic mineral II;
(6) mixing the white feldspar coarse ore obtained by color separation in the step (3) and the minus 1mm undersize obtained in the step (1), grinding the mixture by a ball mill, controlling the granularity of the material to be 60-120 meshes by using a hydraulic classifier and a hindered settler, screening the material by a high-frequency vibrating screen after overflow concentration of the hydraulic classifier, wherein the material on the screen is fine-grained mica II, the undersize is fine-grained feldspar II, the fine-grained mica II and the fine-grained feldspar II are sequentially subjected to vertical ring magnetic machine-level magnetic separation, respectively removing mechanical iron, strong magnetic minerals, biotite, tourmaline and weak magnetic minerals mixed in the mineral processing process, filtering and drying the product subjected to magnetic separation by a concentration belt filter to obtain potassium-sodium mixed feldspar concentrate, and combining all the magnetic minerals obtained by magnetic separation to obtain a magnetic mineral III;
(7) merging the fine-grained mica I and the fine-grained feldspar I obtained in the step (5), the fine-grained mica II and the fine-grained feldspar II obtained in the step (6) and dust generated in the processes of crushing, screening, dry magnetic separation and color separation into fine-grained materials, mixing the fine-grained materials, adding water for slurry preparation, stirring and homogenizing through a stirring barrel, sequentially performing magnetic separation and purification by adopting a vertical ring medium magnetic separator, a vertical ring strong magnetic separator and a slurry type magnetic separator, concentrating a product after magnetic separation, performing filter pressing and drying by adopting a plate and frame filter press to obtain fine-grained feldspar concentrate, and merging all magnetic minerals obtained by magnetic separation into a magnetic mineral IV;
(8) and (3) combining the first magnetic separation mineral obtained in the step (4), the second magnetic separation mineral obtained in the step (5), the third magnetic separation mineral obtained in the step (6) and the fourth magnetic separation mineral obtained in the step (7), concentrating by adopting a concentrating hopper, dehydrating by using a vibrating screen, and stacking in a concentrating manner to be used as an ingredient for cement plants and brick factories.
Wherein, the dry type magnetic separation in the step (2) adopts a dry type roller magnetic separator, and the surface field intensity of the dry type roller magnetic separator is 11000 Gs.
And (4) setting the background field intensity of the vertical ring strong magnetic machine to be 1.5T.
And (5) and (6) adopting quartz balls and quartz lining plates for the ball mill, wherein the background field intensities of the vertical ring magnetic separation are 0.4T, 1.0T and 1.5T in sequence.
And (7) the magnetic field intensity of the vertical ring magnetic separator is 0.4T, the magnetic field intensity of the vertical ring magnetic separator is 1.3T, and the magnetic field intensity of the slurry type magnetic separator is 1.3T.
And (3) in the steps, overflowing in all concentration links, filtrate obtained after dehydration by a vibrating screen and other wastewater enter a thickener for concentration, overflowing water of the thickener is used as backwater, and the bottom flow of the thickener is subjected to filter pressing by a plate and frame filter press to be used as a batching product of cement and brick factories.
The technical scheme of the invention has the following beneficial effects:
the invention adopts the methods of two-section crushing-screening closed-circuit, vertical impact crusher sand making, dry magnetic separation and black mica separation, color separation and black quartz and high potassium feldspar separation, and multi-stage magnetic separation and respective purification to lead the granite minerals to achieve the purpose of comprehensive utilization, and the invention has the following characteristics:
1. after two-stage crushing, the vertical impact crusher is adopted to produce the sand, so that the granularity of the granite is in a required range, the granularity is relatively uniform, the grain shape is better, and the introduced mechanical pollution is less.
2. More than 90 percent of biotite is separated in advance by dry magnetic separation before color separation, so that obstacles are cleared away for subsequent color separation operation.
3. By utilizing secondary color separation, black quartz and high-potassium red feldspar with large color difference are separated, and mineral particles with small color difference are treated as potassium-sodium mixed ores.
4. The treatment mode of the biotite in the invention is as follows: the dry magnetic separation, the hydraulic classification and the vertical ring strong magnetic separation are carried out for three guarantees, and the mica in the feldspar can be thoroughly removed.
5. According to the invention, the feldspar grinding ore adopts the quartz balls and the quartz lining plate, so that the mechanical pollution is avoided, and the influence of the fine slag of the conventional high-alumina balls or medium-alumina balls on the subsequent ceramic processing is reduced.
6. The method separates fine-grained materials in the feldspar separately, combines the fine-grained materials, utilizes the gradient cooperation of magnetism and strong magnetism in the vertical ring magnetic separator, adopts the slurry magnetic separator to finally obtain high-quality fine-grained feldspar concentrates aiming at the characteristic of fine materials.
7. The mineral separation and purification methods adopted in the invention are physical methods, no waste gas is generated, dust and waste water of each operation are reasonably treated, the production environment is friendly, and green production is really realized.
The invention is not limited by production scale, and the valuable mineral components quartz, mica and feldspar in granite are separated and respectively purified, thereby achieving the purpose of comprehensive utilization.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description is given with reference to specific embodiments.
The invention provides a comprehensive utilization method of granite.
In the specific implementation process of the method, the steps are as follows:
1. crushing-sand making: roughly crushing granite by a jaw crusher, sieving by a linear vibrating screen, returning oversize products to be roughly crushed, feeding minus 3cm products under the screen into a cone crusher for fine crushing, sieving by the linear vibrating screen again, returning oversize products to be finely crushed, feeding fine ores under the screen, about (-1.3cm), into a vertical impact crusher, and sieving by the linear vibrating screen to obtain granite particles of 1-4 mm and minus 1mm undersize products. Carrying out dry magnetic separation on particles with the diameter of 1-4 mm; undersize of 1mm was treated as a fine fraction material.
2. Dry magnetic separation: granite particles with the thickness of 1-4 mm are uniformly fed to a dry roller type magnetic separator (the surface field intensity is 11000Gs) through a distributor, and flaky biotite is sorted out.
3. Color selection: and performing primary color separation on the dry magnetic separation tailings to obtain a black quartz mixed ore and a feldspar mixed ore, performing secondary color separation on the two mixed ores respectively, wherein concentrates obtained by the secondary color separation are respectively a black quartz coarse ore and a red feldspar coarse ore (hereinafter referred to as a high-potassium mineral) and tailings are combined to form a white feldspar coarse ore (hereinafter referred to as a potassium-sodium mixed ore).
4. Purifying black quartz: and (3) carrying out ore grinding-screening closed flow on the black quartz crude ore obtained by color separation by using a rod mill, returning and regrinding the oversize material, grading the undersize material by using a hydraulic classifier, controlling the particle size of the material to be 40-180 meshes, removing mechanical iron and strong magnetic minerals by sequentially passing through a vertical ring strong magnetic machine, removing weak magnetic minerals in the minerals by passing through a vertical ring strong magnetic machine (the background field intensity is 1.5T) to obtain black quartz concentrate, and combining the medium magnetic mineral and the strong magnetic mineral into the magnetic mineral 1.
5. Purifying the high-potassium feldspar: the high-potassium mineral obtained by color separation is ground by a ball mill (quartz balls and quartz lining plates are adopted), the granularity of the material is controlled between 60 and 120 meshes by a hydraulic classifier and a hindered settling vessel, the overflow of the hydraulic classifier is concentrated and then screened by a high-frequency vibrating screen, the material on the screen is fine-grained mica 1, and the material under the screen is fine-grained feldspar (hereinafter referred to as fine-grained feldspar 1). 60-120 mesh materials are sequentially subjected to magnetic separation by a vertical ring magnetic separator, the background field intensity is 0.4T, 1.0T and 1.5T, and mechanical iron and strong magnetic minerals, a small amount of biotite, tourmaline and Fe in the minerals, which are mixed in the mineral processing process, are respectively removed2O3And (3) when the weakly magnetic minerals are subjected to magnetic separation, concentrating the product subjected to magnetic separation, filtering the product by using a belt filter, and drying the product to obtain the high potassium feldspar concentrate. All the magnetic minerals are combined to become the magnetic mineral 2.
6. Purifying potassium-sodium mixed ore: mixing potassium-sodium mixed mineral obtained by color separation with-1 mm sieve material of a crushing sand making section, grinding the mineral by a ball mill (adopting quartz balls and quartz lining plates), controlling the material granularity between 60 and 120 meshes by a hydraulic classifier and a hindered settling device, and screening the material on the sieve by a high-frequency vibrating screen after the overflow concentration of the hydraulic classifierThe particle grade mica 2 is fine-grade feldspar (hereinafter referred to as fine-grade feldspar 2) under the screen. 60-120 mesh materials are sequentially subjected to magnetic separation by a vertical ring magnetic separator, the background field intensity is 0.4T, 1.0T and 1.5T, and mechanical iron and strong magnetic minerals, a small amount of biotite, tourmaline and Fe in the minerals, which are mixed in the mineral processing process, are respectively removed2O3And (3) when the magnetic mineral is weakly magnetic, concentrating the product after magnetic separation, filtering the product by using a belt filter, and drying the product to obtain the potassium-sodium mixed feldspar concentrate. All the magnetic minerals are combined to become the magnetic mineral 3.
7. And (3) purifying fine-fraction materials: the fine-fraction material comprises a fine-fraction material 1 generated in the process of purifying the high-potassium material, a fine-fraction material 2 generated in the process of purifying the potassium-sodium mixed ore, and dust generated in the processes of crushing, screening, dry magnetic separation and color separation. Mixing the materials, adding water to prepare slurry, stirring and homogenizing by a stirring barrel, carrying out magnetic separation and purification by sequentially adopting a vertical ring medium magnetic separator (0.4T), a vertical ring strong magnetic separator (1.3T) and a slurry type magnetic separator (1.3T), and carrying out filter pressing and drying on the concentrated product by adopting a plate and frame filter press to obtain the fine-grained feldspar concentrate. All the magnetic minerals are combined to become the magnetic mineral 4.
8. And (3) processing of magnetic minerals: the magnetic minerals are mainly obtained in the magnetic separation section in the purification process of the four materials, mainly comprise mechanical iron introduced in the processing process, strong magnetic minerals in the minerals, tourmaline, mica and other weak magnetic minerals, the minerals are concentrated by a concentration hopper after being gathered, and are subjected to dehydration by a vibrating screen and concentrated stacking, and the product can be used as a batching material in cement plants and brick factories.
9. In the process, overflow of all concentration links, filtrate and other wastewater after dehydration by a vibrating screen enter a thickener for concentration, overflow water of the thickener is used as return water, and the bottom flow of the thickener is filter-pressed by a plate and frame filter press to be used as a batching product of cement and brickyard.
The method of the invention is used for researching a certain granite, and the contents and the purposes of the main components of the obtained product are as follows:
while the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A comprehensive utilization method of granite is characterized in that: the method comprises the following steps:
(1) carrying out two-stage crushing-screening closed flow on granite to obtain granite particles of 1-4 mm and undersize of-1 mm;
(2) carrying out dry magnetic separation on granite particles with the particle size of 1-4 mm to obtain biotite and magnetic separation tailings;
(3) performing color separation on the magnetic separation tailings to obtain black quartz coarse ores, red feldspar coarse ores and white feldspar coarse ores;
(4) carrying out ore grinding-screening closed-loop flow and hydraulic classifier grading on the black quartz crude ore obtained by color separation in the step (3) by using a rod mill, controlling the granularity of the material to be 40-180 meshes, sequentially removing mechanical iron and strong magnetic minerals through a vertical ring strong magnetic machine, and removing weak magnetic minerals through a vertical ring strong magnetic machine to obtain black quartz concentrate, wherein the weak magnetic minerals and the strong magnetic minerals are combined into a magnetic mineral I;
(5) carrying out color separation on the red feldspar crude ore obtained in the step (3), grinding the red feldspar crude ore by using a ball mill, controlling the granularity of the material to be 60-120 meshes by using a hydraulic classifier and a hindered settler, and screening the material by using a high-frequency vibrating screen after overflow concentration of the hydraulic classifier, wherein the material on the screen is fine-grained mica I, and the material under the screen is fine-grained feldspar I; fine-grained mica I and fine-grained feldspar I are sequentially subjected to vertical ring magnetic separation by virtue of a vertical ring magnetic machine, mechanical iron, strong magnetic minerals, biotite, tourmaline and weak magnetic minerals mixed in the mineral processing process are respectively removed, products subjected to magnetic separation are concentrated, filtered by a belt filter and dried to obtain high-potassium feldspar concentrates, and all magnetic minerals obtained by magnetic separation are combined to form a magnetic mineral II;
(6) mixing the white feldspar coarse ore obtained by color separation in the step (3) and the minus 1mm undersize obtained in the step (1), grinding the mixture by a ball mill, controlling the granularity of the material to be 60-120 meshes by using a hydraulic classifier and a hindered settler, screening the material by a high-frequency vibrating screen after overflow concentration of the hydraulic classifier, wherein the material on the screen is fine-grained mica II, the undersize is fine-grained feldspar II, the fine-grained mica II and the fine-grained feldspar II are sequentially subjected to vertical ring magnetic machine-level magnetic separation, respectively removing mechanical iron, strong magnetic minerals, biotite, tourmaline and weak magnetic minerals mixed in the mineral processing process, filtering and drying the product subjected to magnetic separation by a concentration belt filter to obtain potassium-sodium mixed feldspar concentrate, and combining all the magnetic minerals obtained by magnetic separation to obtain a magnetic mineral III;
(7) merging the fine-grained mica I and the fine-grained feldspar I obtained in the step (5), the fine-grained mica II and the fine-grained feldspar II obtained in the step (6) and dust generated in the processes of crushing, screening, dry magnetic separation and color separation into fine-grained materials, mixing the fine-grained materials, adding water for slurry preparation, stirring and homogenizing through a stirring barrel, sequentially performing magnetic separation and purification by adopting a vertical ring medium magnetic separator, a vertical ring strong magnetic separator and a slurry type magnetic separator, concentrating a product after magnetic separation, performing filter pressing and drying by adopting a plate and frame filter press to obtain fine-grained feldspar concentrate, and merging all magnetic minerals obtained by magnetic separation into a magnetic mineral IV;
(8) and (3) combining the first magnetic separation mineral obtained in the step (4), the second magnetic separation mineral obtained in the step (5), the third magnetic separation mineral obtained in the step (6) and the fourth magnetic separation mineral obtained in the step (7), concentrating by adopting a concentrating hopper, dehydrating by using a vibrating screen, and stacking in a concentrating manner to be used as an ingredient for cement plants and brick factories.
2. The comprehensive utilization method of granite according to claim 1, characterized in that: and (3) adopting a dry roller type magnetic separator for dry magnetic separation in the step (2), wherein the surface field intensity of the dry roller type magnetic separator is 11000 Gs.
3. The comprehensive utilization method of granite according to claim 1, characterized in that: and (4) the background field intensity of the neutral ring strong magnetic machine in the step (4) is 1.5T.
4. The comprehensive utilization method of granite according to claim 1, characterized in that: and (4) in the step (5) and the step (6), quartz balls and quartz lining plates are adopted by the ball mill, and the background field intensity of vertical ring magnetic separation is 0.4T, 1.0T and 1.5T in sequence.
5. The comprehensive utilization method of granite according to claim 1, characterized in that: in the step (7), the magnetic field intensity of the vertical ring magnetic separator is 0.4T, the magnetic field intensity of the vertical ring magnetic separator is 1.3T, and the magnetic field intensity of the slurry type magnetic separator is 1.3T.
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|---|---|---|---|---|
| CN109622210B (en) * | 2018-12-27 | 2021-02-05 | 中建材蚌埠玻璃工业设计研究院有限公司 | Method for purifying weathered potash feldspar ore in grading grade |
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| CN114082521B (en) * | 2021-11-24 | 2022-08-09 | 贺州久源矿业有限公司 | Process for comprehensively recovering mica from granite weathered shell type potash feldspar |
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