CN118218251A - Diatomite dry physical mineral separation process and application - Google Patents
Diatomite dry physical mineral separation process and application Download PDFInfo
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- CN118218251A CN118218251A CN202310886368.1A CN202310886368A CN118218251A CN 118218251 A CN118218251 A CN 118218251A CN 202310886368 A CN202310886368 A CN 202310886368A CN 118218251 A CN118218251 A CN 118218251A
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- diatomite
- dry
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- preparing
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 17
- 239000011707 mineral Substances 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 title claims abstract description 9
- 239000000843 powder Substances 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 239000011435 rock Substances 0.000 claims abstract description 13
- 238000012216 screening Methods 0.000 claims abstract description 7
- 239000012634 fragment Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000005909 Kieselgur Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 6
- 238000005034 decoration Methods 0.000 claims description 4
- 239000012767 functional filler Substances 0.000 claims description 4
- 150000001413 amino acids Chemical class 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052804 chromium Inorganic materials 0.000 abstract description 16
- 239000011651 chromium Substances 0.000 abstract description 16
- 239000000377 silicon dioxide Substances 0.000 abstract description 14
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004032 superbase Substances 0.000 description 6
- 150000007525 superbases Chemical class 0.000 description 6
- 238000000227 grinding Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052622 kaolinite Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 230000000035 biogenic effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a diatomite dry physical mineral separation process. The process comprises the following steps: crushing the grade I or grade II diatomite raw ore to obtain diatomite raw ore powder; the raw diatomite ore powder is dried for the first time to obtain primary diatomite dry powder; screening the diatomite primary dry powder to remove most of superbasic rock fragments and diatomite blocks to obtain diatomite primary dry fine powder; performing secondary drying on the diatomite primary drying fine powder to obtain diatomite dry powder; and removing impurities in the diatomite dry powder to obtain diatomite dry fine powder. The process can effectively reduce the chromium content of the diatomite, improve the silicon dioxide content of the diatomite, expand the application field of the diatomite, save energy and protect environment, and has low production cost and good application prospect.
Description
Technical Field
The invention relates to the technical field of mineral separation processes, in particular to a diatomite dry physical mineral separation process and application.
Background
The diatomite deposit of the mining area of Maanshan, jilin Jishan, white mountain is distributed for more than 200 square kilometers, the ascertained reserve is 2 hundred million tons, the distant reserve is 4.1 hundred million tons, wherein the class I diatomite and the class II diatomite respectively account for about 20 percent, and the class III diatomite and the diatomite account for about 60 percent. Diatomite classification standard: the content of the silicon dioxide of the I-grade diatomite is more than or equal to 85 percent; the silicon dioxide content of the II-stage diatomite is less than 85 percent and more than or equal to 80 percent; the III-grade diatomite silicon dioxide content is less than 80 percent and more than or equal to 70 percent; the silica content is less than 70% is diatomaceous clay. The diatomite ore deposit is famous for the generation because of large reserves and high grade. Diatomite is a biogenic siliceous sedimentary rock, is a natural nonmetallic mineral, is mainly formed by siliceous remains of the ancient water single-cell plant diatom, and mainly consists of amorphous SiO 2, and contains a small amount of crystals SiO2、Fe3O4、Fe2O3、MgO、CaCO3、Al2O3、Cr2O3 and organic matters.
At present, diatomite products processed and developed in Baishan city mainly comprise six major categories of filter aids, heat insulation materials, carrier materials, functional fillers, catalysts and building decoration materials. The product is mainly processed by the I-grade diatomite, and the II-grade diatomite and the III-grade diatomite are basically discarded and wasted. The application of the diatomite in the field of animal feed is just started, but the chromium content (generally 8-30 ppm) of raw ore of the diatomite exceeds the standard, which is far beyond the national standard for feed sanitation (5 ppm), and becomes an insurmountable threshold for the application of the diatomite in the field of feed.
At present, no technology for reducing chromium of diatomite is disclosed.
Disclosure of Invention
Therefore, the invention provides a diatomite dry physical mineral separation process and application.
In order to achieve the above object, the present invention provides the following technical solutions:
According to a first aspect of the invention, the invention provides a diatomite dry physical beneficiation process, comprising the following steps:
(1) Crushing the grade I or grade II diatomite raw ore to obtain diatomite raw ore powder;
(2) The raw diatomite ore powder is dried for the first time to obtain primary diatomite dry powder;
(3) Screening the diatomite primary dry powder to remove most of superbasic rock fragments and diatomite blocks to obtain diatomite primary dry fine powder;
(4) Performing secondary drying on the diatomite primary drying fine powder to obtain diatomite dry powder;
(5) And removing impurities in the diatomite dry powder to obtain diatomite dry fine powder.
The invention takes the grade I or grade II diatomite raw ore as the raw material, and grade III diatomite raw ore is not applicable.
The III-grade diatomite is difficult to select out the diatomite dry refined powder reaching the standard due to the excessive impurity content.
The applicant researches find that chromium in raw diatomite ore mainly exists in an oxidation state (3-valence chromium) and is formed by mixing diatomite with superbase rock scraps in the ore forming process, wherein a part of the oxidation state chromium is associated with iron particles in the superbase rock, and a part of the oxidation state chromium is symbiotic with clay minerals such as kaolinite, hydromica and the like in the superbase rock. Clay minerals such as kaolinite and hydromica form blocks with different sizes of diatomite after being weathered. Therefore, the applicant can effectively remove the superbase rock fragments and the diatomite blocks by screening so as to achieve the purposes of reducing the chromium content of the diatomite and improving the silicon dioxide content of the diatomite by adopting the European coarse grinding to grind the diatomite, wherein the diatomite is ground, most of superbase rocks and diatomite blocks are not ground, and the particle size of the diatomite is far smaller than that of the superbase rocks and the diatomite.
Further, in the step (1), crushing is carried out by using an European coarse powder mill, and the particle size of the diatomite raw mineral powder is 4-80 meshes.
In the step (2), the conditions of the first drying are as follows: the rotary kiln is at the temperature of 250-450 ℃ for 30-40 minutes; the water content of the diatomite preliminary dry powder is 35-40%.
In the step (3), a 6-10 mesh vibrating screen is adopted for sieving. The research shows that the diatomite loses part of colloid water under the condition of 35-40% of water content, becomes harder clay blocks, has larger viscosity and is not easy to break. Under the screen mesh, most of superbasic rock and diatomite blocks can be separated out.
In the step (4), the conditions of the second drying are as follows: the rotary kiln is at the temperature of 250-450 ℃ for 30-40 minutes; the water content of the diatomite dry powder is lower than 5%.
In the step (5), an air classifier is used for removing impurities, and the particle size of the impurities is larger than 200 meshes.
The invention dries and dehydrates the raw ore powder of the diatomite under the temperature condition of 450 ℃ or below, can not destroy the special micropore structure of the diatomite particles, ensures the physical and chemical properties of the diatomite, and protects the bioactive substances contained in the diatomite from being destroyed.
According to a second aspect of the invention, there is provided a diatomaceous earth dry concentrate prepared by the process as described in any one of the preceding claims.
According to a third aspect of the present invention there is provided the use of a diatomaceous earth dry concentrate as described above in any one of the following:
(1) Preparing an animal feed product;
(2) Preparing a mould removing agent product;
(3) Preparing an amino acid product;
(4) Preparing a premix product;
(5) Preparing a tiepin product;
(6) Preparing a filter aid product;
(7) Preparing a functional filler product;
(8) And preparing a building decoration and finishing material product.
The invention has the following advantages:
1. the diatomite dry refined powder prepared by the method belongs to dry physical mineral separation, and the emission reaches the standard, so that secondary environmental protection treatment is not needed, the environmental pollution is reduced, and the environmental protection pressure is low.
2. The invention adopts dry physical mineral separation, and has low energy consumption and low production cost.
3. The invention solves the problem of exceeding chromium standard, makes the preparation of animal feed and related products by diatomite possible, expands the application field of diatomite, and can certainly promote the green, environment-friendly and healthy development of animal husbandry and save grains.
4. The invention solves the purification problem of diatomite, makes the II-grade diatomite utilized, and improves the utilization rate of diatomite resources.
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. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a flow chart of a diatomite dry physical beneficiation process provided by the invention;
FIG. 2 is a photograph of a diatomaceous earth dry concentrate prepared in example 1 of the present invention;
FIG. 3 is a photograph of a diatomaceous earth dry concentrate prepared in example 2 of the present invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but 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
The embodiment of the invention provides a diatomite dry physical beneficiation process, which is shown in fig. 1 and comprises the following steps of:
(1) Selecting II-level diatomite raw ore;
(2) Crushing the diatomite raw ore by using European coarse grinding to obtain diatomite raw ore powder with the particle size of 4-80 meshes;
(3) Placing raw diatomite ore powder into a rotary kiln, and drying for 30 minutes at 250-450 ℃ to obtain primary diatomite dry powder with the water content of 35%;
(4) Screening the diatomite primary dry powder by using a 10-mesh vibrating screen, wherein the oversize materials are most of super-basic rock, diatomite blocks and sand grains, and collecting undersize materials to obtain diatomite primary dry fine powder;
(5) Placing the diatomite primary dried refined powder into a rotary kiln, and drying for 30 minutes at 250-450 ℃ to obtain diatomite dried powder with the water content of less than 5% (only with the water content of less than 5%, and then effectively removing impurities by using an air classifier);
(6) Removing impurities from the diatomite dry powder by using an air classifier, and removing impurities with more than 200 meshes to obtain the diatomite dry fine powder.
The silica and chromium content of the grade II diatomaceous earth ore and diatomaceous earth dry fine powder were tested as follows:
Grade II diatomaceous earth raw ore: 80.5 percent of silicon dioxide and 15.88ppm of chromium;
Diatomite dry fine powder: the silica content was 85.8% and the chromium content was 3.86ppm.
Example 2
The embodiment of the invention provides a diatomite dry physical beneficiation process, which is shown in fig. 1 and comprises the following steps of:
(1) Selecting an I-level diatomite raw ore;
(2) Crushing the diatomite raw ore by using European coarse grinding to obtain diatomite raw ore powder with the particle size of 4-80 meshes;
(3) Placing raw diatomite ore powder into a rotary kiln, and drying for 30 minutes at 250-450 ℃ to obtain primary diatomite dry powder with the water content of 35%;
(4) Screening the diatomite primary dry powder by using a 10-mesh vibrating screen, wherein the oversize materials are most of super-basic rock, diatomite blocks and sand grains, and collecting undersize materials to obtain diatomite primary dry fine powder;
(5) Placing the diatomite primary dried refined powder into a rotary kiln, and drying for 30 minutes at 250-450 ℃ to obtain diatomite dried powder with the water content of less than 5% (only with the water content of less than 5%, and then effectively removing impurities by using an air classifier);
(6) Removing impurities from the diatomite dry powder by using an air classifier, and removing impurities with more than 200 meshes to obtain the diatomite dry fine powder.
The silica and chromium content of the grade I diatomaceous earth ore and diatomaceous earth dry fine powder were tested as follows:
grade I diatomaceous earth raw ore: 85.3 percent of silicon dioxide and 10.76ppm of chromium;
Diatomite dry fine powder: the silica content was 87.5% and the chromium content was 4.27ppm.
The diatomite dry fine powder prepared in the embodiment 1-2 has higher silicon dioxide content and lower chromium content, and can be applied to diatomite feed, mold release agent carrier, amino acid carrier, premix carrier, anti-product carrier, diatomite filter aid, diatomite functional material, diatomite functional filler and diatomite building decoration material.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (8)
1. The diatomite dry physical mineral separation process is characterized by comprising the following steps of:
(1) Crushing the grade I or grade II diatomite raw ore to obtain diatomite raw ore powder;
(2) The raw diatomite ore powder is dried for the first time to obtain primary diatomite dry powder;
(3) Screening the diatomite primary dry powder to remove most of superbasic rock fragments and diatomite blocks to obtain diatomite primary dry fine powder;
(4) Performing secondary drying on the diatomite primary drying fine powder to obtain diatomite dry powder;
(5) And removing impurities in the diatomite dry powder to obtain diatomite dry fine powder.
2. A diatomite dry physical mineral processing process as defined in claim 1, wherein,
In the step (1), crushing is carried out by using an European coarse powder mill, and the particle size of the diatomite raw mineral powder is 4-80 meshes.
3. A diatomite dry physical mineral processing process as defined in claim 1, wherein,
In the step (2), the conditions of the first drying are as follows: the rotary kiln is at the temperature of 250-450 ℃ for 30-40 minutes; the water content of the diatomite preliminary dry powder is 35-40%.
4. A diatomite dry physical mineral processing process as defined in claim 1, wherein,
In the step (3), a 6-10 mesh vibrating screen is adopted for screening.
5. A diatomite dry physical mineral processing process as defined in claim 1, wherein,
In the step (4), the conditions of the second drying are as follows: the rotary kiln is at the temperature of 250-450 ℃ for 30-40 minutes; the water content of the diatomite dry powder is lower than 5%.
6. A diatomite dry physical mineral processing process as defined in claim 1, wherein,
In the step (5), an air classifier is used for removing impurities, and the particle size of the impurities is larger than 200 meshes.
7. A diatomaceous earth dry concentrate, characterized in that it is prepared by the process according to any one of claims 1 to 6.
8. Use of the diatomaceous earth dry concentrate of claim 7 in any one of the following:
(1) Preparing an animal feed product;
(2) Preparing a mould removing agent product;
(3) Preparing an amino acid product;
(4) Preparing a premix product;
(5) Preparing a tiepin product;
(6) Preparing a filter aid product;
(7) Preparing a functional filler product;
(8) And preparing a building decoration and finishing material product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310886368.1A CN118218251A (en) | 2023-07-19 | 2023-07-19 | Diatomite dry physical mineral separation process and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310886368.1A CN118218251A (en) | 2023-07-19 | 2023-07-19 | Diatomite dry physical mineral separation process and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118218251A true CN118218251A (en) | 2024-06-21 |
Family
ID=91505420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310886368.1A Pending CN118218251A (en) | 2023-07-19 | 2023-07-19 | Diatomite dry physical mineral separation process and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118218251A (en) |
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2023
- 2023-07-19 CN CN202310886368.1A patent/CN118218251A/en active Pending
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