CN110589845A - Method and system for low-cost purification of attapulgite clay - Google Patents
Method and system for low-cost purification of attapulgite clay Download PDFInfo
- Publication number
- CN110589845A CN110589845A CN201911057624.6A CN201911057624A CN110589845A CN 110589845 A CN110589845 A CN 110589845A CN 201911057624 A CN201911057624 A CN 201911057624A CN 110589845 A CN110589845 A CN 110589845A
- Authority
- CN
- China
- Prior art keywords
- attapulgite clay
- attapulgite
- low
- air
- moisture content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method and a system for purifying attapulgite clay at low cost, wherein the attapulgite clay comprises attapulgite, quartz, feldspar, dolomite, gypsum and other impurity minerals, and the method comprises the following steps: (1) natural low-grade attapulgite clay is adopted; (2) naturally weathering and airing the attapulgite clay provided in the step (1) to reduce the moisture content in the attapulgite clay to a set moisture content; (3) selectively crushing the attapulgite clay subjected to air-drying by air-drying in the step (2) until the attapulgite clay is crushed to be below a set particle size; (4) and (4) carrying out air separation classification on the crushed attapulgite clay in the step (3) under set air pressure to obtain an attapulgite clay product. The method has low cost, is simple and feasible, and the prepared purified attapulgite clay product can be widely applied to the fields of petroleum, chemical industry, building materials, agriculture and the like.
Description
Technical Field
The invention relates to a method and a system for purifying attapulgite clay at low cost.
Background
The attapulgite clay is a clay mineral containing attapulgite (Attapulgite) as main component. Attapulgite is a crystalline hydrated magnesium aluminum silicate mineral, has unique layer chain structure characteristics, has lattice displacement in the structure, and contains indefinite rod crystalsAmount of Na+、Ca2+、Fe3+、Al3+The crystals are needle-shaped, fibrous or fibrous aggregates. The attapulgite has good colloidal properties of unique dispersion, high temperature resistance, salt and alkali resistance and the like and higher adsorption decoloring capacity. The adhesive has certain plasticity and binding power, and the ideal chemical molecular formula is as follows: (Mg, Al)2Si4O10(OH)·4H2And O. Having an intermediate structure between the chain-like structure and the layered structure. The attapulgite is produced in sedimentary rock and weathering crust in the form of soil and compact blocks, and has white, off-white, grey green or weak sericin luster. The soil is fine and smooth, has a greasy feeling, is light and crisp, has shell-shaped or ragged fracture and strong water absorption. Has viscosity and plasticity when wet, shrinks less after drying, does not show cracks greatly, and is soaked in water to be disintegrated. The suspension does not flocculate and precipitate when encountering dielectrics. The attapulgite is in the form of hair or fiber, usually in the form of felt or soil aggregate. The Mohs hardness is 2-3, the mixture is heated to 700-800 ℃, and the hardness is>5. The specific gravity is 2.05-2.32. Due to the unique crystal structure of the attapulgite, the attapulgite has a plurality of special physical and chemical and technological properties. The main physical and chemical properties and technological properties are as follows: cation exchangeability, water absorption, adsorption decoloration property and large specific surface area (9.6-36 m)2Per g) and the colloidal value and the expansion capacity, so that the product is widely applied to the aspects of petroleum, chemical industry, building materials, papermaking, medicine, agriculture and the like, and is called king of thousand soils.
The attapulgite clay in the natural world of China has different attapulgite content, the attapulgite content with high content is more than 80%, but the reserves are very small, the attapulgite clay has 20-30% of attapulgite content, and the attapulgite clay also contains a large amount of quartz, dolomite, illite, montmorillonite, gypsum and other impurities, the impurity minerals are very unfavorable for the application of the attapulgite clay, and how to remove the impurity minerals at low cost and improve the attapulgite content always is a technical difficulty restricting the conversion of low-quality attapulgite clay resources into economic benefits, so the low-cost purification method of the attapulgite clay has important economic significance and social application value.
Disclosure of Invention
The invention aims to provide a method and a system for purifying attapulgite clay at low cost.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a method for low-cost purification of attapulgite clay, which comprises attapulgite, comprises the following steps:
(1) natural low-grade attapulgite clay is adopted;
(2) naturally weathering and airing the attapulgite clay provided in the step (1) to reduce the moisture content in the attapulgite clay to a set moisture content;
(3) selectively crushing the attapulgite clay subjected to air-drying by air-drying in the step (2) to ensure that the fragile attapulgite is crushed preferentially, and crushing the attapulgite clay to be below a set particle size;
(4) air-separating and grading the crushed attapulgite clay in the step (3) under set air pressure to separate 30-60% of light materials by air separation, thus obtaining an attapulgite product;
wherein, in the step (2), the set moisture content is not more than 10%, in the step (3), the set particle size is not more than 80 meshes, and in the step (4), the set wind pressure is 10000-15000 Pa.
As used herein, the attapulgite clay includes attapulgite and other impurity minerals such as quartz, feldspar, dolomite, and gypsum.
Preferably, in the step (1), the moisture content in the attapulgite clay is 10-20%, and the attapulgite content is 15-30%.
Preferably, in the step (2), the set moisture content is 5% to 9%.
Preferably, in the step (3), the set particle size is 80 to 325 mesh.
Preferably, in the step (4), the set wind pressure is 10000-15000 Pa.
Preferably, in the step (4), the content of attapulgite in the attapulgite product is 35-60%.
The invention also provides another technical scheme: a system for low-cost purification of attapulgite clay is used in the method, and comprises a selective crushing device and an air flow classification device, wherein the selective crushing device is a turbine type crusher which needs to remove a screen when in use.
Preferably, the selective pulverizing apparatus is a primary pulverizing apparatus including an SD series turbine type pulverizer of model SD-250 or a secondary pulverizing apparatus including an SD series turbine type pulverizer of model SD-250 and a CJ series pulverizer of model CJ-60.
Preferably, the air classifier uses a QLFW air classifier model QLFW 50.
The working principle of the invention is as follows: (1) attapulgite is easily crushed under the action of mechanical collision, and minerals such as quartz, dolomite, gypsum and the like, which are impurity minerals, are not easily crushed under the action of mechanical collision, so that the aim of selective crushing is fulfilled; (2) by utilizing the characteristics of fine granularity, light specific gravity and coarse granularity and large specific gravity of impurity minerals such as quartz, dolomite, gypsum and the like which are easy to crush after selective crushing, the attapulgite is taken away and collected under the action of wind power through wind power classification and cyclone collection, and the impurity minerals are precipitated due to the coarse granularity and the large specific gravity, thereby achieving the purpose of purifying the attapulgite clay.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the low-cost purification method of the attapulgite clay disclosed by the invention overcomes the technical difficulties that the wet purification process of the attapulgite clay is difficult to dehydrate and high in drying cost, and the performance of the prepared attapulgite clay purified product is reduced.
Detailed Description
The invention is further described below with reference to examples.
Example one
A low-cost purification method of attapulgite clay comprises the following steps: natural low-grade attapulgite clay is naturally weathered and aired, the content of attapulgite in the natural attapulgite clay is 21 percent,
the water content is 10.5 percent, the natural weathering and airing time is 3 days, the water content after airing is 8.5 percent, the attapulgite clay after natural weathering and airing is selectively crushed by an SD series turbine type crusher with the model number of SD-250, the crushing fineness is below 80 meshes, a QLFW air classifier with the model number of QLFW50 is adopted for air separation and classification, when the revolution number of the classifier is 900r/min, the purified attapulgite clay product is obtained, the attapulgite content is 40 percent, and the yield is 30 percent.
Example two
A low-cost purification method of attapulgite clay comprises the following steps: the natural low-grade attapulgite clay is naturally weathered and aired, the content of attapulgite in the natural low-grade attapulgite clay is 23%, the moisture content is 10.5%, the natural weathering and airing time is 3 days, and the moisture content after airing is 8.5%, the naturally weathered and aired attapulgite clay is subjected to two-stage crushing by adopting an SD series turbine type crusher with the model of SD-250 and a CJ series crusher with the model of CJ-60, the crushing fineness is less than 100 meshes, a QLFW air classifier with the model of QLFW50 is adopted for air classification, when the revolution of the classifier is 1900r/min, a purified attapulgite clay product is obtained, the content of the attapulgite clay is 47%, the yield is 39%, and the purified product can be widely applied to the fields of petroleum, chemical engineering, building materials, agriculture and the like.
EXAMPLE III
A low-cost purification method of attapulgite clay comprises the following steps: the method comprises the steps of naturally weathering and airing the natural low-grade attapulgite clay, wherein the content of attapulgite in the natural attapulgite clay is 21%, the content of water is 10.5%, the naturally weathering and airing time is 3 days, and the water content after airing is 8.5%, carrying out two-stage crushing on the naturally weathering and airing attapulgite clay by adopting an SD series turbo crusher with the model SD-250 and a CJ series crusher with the model CJ-60, wherein the crushing fineness is less than 100 meshes, carrying out air separation and classification by adopting a QLFW air flow classifier with the model QLFW50, and obtaining a purified attapulgite clay product when the rotation number of the classifier is 900r/min, wherein the content of attapulgite in the purified attapulgite clay is 35%, the yield is 56%, the content of attapulgite in the purified tailings is reduced to less than 5%, the yield is 44%, and the purified attapulgite clay can be backfilled into mines as tailings to achieve the purpose of large number of tails.
In the above embodiment, the SD series turbo type pulverizer model SD-250 was manufactured by qiangjiang nippon pulverizing equipment ltd, and the parameters thereof are as follows:
the parameters of CJ series pulverizer model CJ-60 are shown in the following table:
QLFW air classifier model QLFW50 has the following table:
Claims (9)
1. a method for purifying attapulgite clay at low cost, wherein the attapulgite clay comprises attapulgite, is characterized by comprising the following steps:
(1) natural low-grade attapulgite clay is adopted;
(2) naturally weathering and airing the attapulgite clay provided in the step (1) to reduce the moisture content in the attapulgite clay to a set moisture content;
(3) selectively crushing the attapulgite clay subjected to air-drying by air-drying in the step (2) to ensure that the fragile attapulgite is crushed preferentially, and crushing the attapulgite clay to be below a set particle size;
(4) air-separating and grading the crushed attapulgite clay in the step (3) under set air pressure to separate 30-60% of light materials by air separation, thus obtaining an attapulgite product;
wherein, in the step (2), the set moisture content is not more than 10%, in the step (3), the set particle size is not more than 80 meshes, and in the step (4), the set wind pressure is 10000-15000 Pa.
2. A low-cost purification method of attapulgite clay according to claim 1, wherein in step (1), the moisture content in the attapulgite clay provided is 10-20%, and the attapulgite content is 15-30%.
3. A low-cost purification method of attapulgite clay according to claim 1, wherein in the step (2), the set moisture content is 5-9%.
4. A low-cost purification method of attapulgite clay according to claim 1, wherein in the step (3), the set particle size is 80-325 mesh.
5. The method for low-cost purification of attapulgite clay according to claim 1, wherein in the step (4), the set wind pressure is 10000-15000 Pa.
6. The method for low-cost purification of attapulgite clay according to claim 1, wherein in the step (4), the content of attapulgite in the attapulgite clay product is 35-60%.
7. A system for the low-cost purification of attapulgite clay, which is used in the method of any one of claims 1 to 6, and which comprises a selective crushing device and an air classification device, wherein the selective crushing device is a turbine type crusher which is used for removing a screen.
8. The system for low-cost purification of attapulgite clay according to claim 7, wherein the selective pulverizing device is a primary pulverizing device comprising a model SD-250 SD series turbine type pulverizer or a secondary pulverizing device comprising a model SD-250 SD series turbine type pulverizer and a model CJ-60 CJ series pulverizer.
9. The system for low-cost purification of attapulgite clay according to claim 7, wherein the air classifier uses a QLFW air classifier model QLFW 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911057624.6A CN110589845A (en) | 2019-11-01 | 2019-11-01 | Method and system for low-cost purification of attapulgite clay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911057624.6A CN110589845A (en) | 2019-11-01 | 2019-11-01 | Method and system for low-cost purification of attapulgite clay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110589845A true CN110589845A (en) | 2019-12-20 |
Family
ID=68852131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911057624.6A Pending CN110589845A (en) | 2019-11-01 | 2019-11-01 | Method and system for low-cost purification of attapulgite clay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110589845A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953025A (en) * | 2021-10-11 | 2022-01-21 | 中铝中州铝业有限公司 | Method for grinding viscous bauxite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122769A (en) * | 1994-11-06 | 1996-05-22 | 张义纲 | Process for preparing active bleaching earth from attapulgite clay |
| CN106554023A (en) * | 2015-09-24 | 2017-04-05 | 刘从荡 | A kind of technique of preparing activated bleaching clay from attapulgite clay |
-
2019
- 2019-11-01 CN CN201911057624.6A patent/CN110589845A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1122769A (en) * | 1994-11-06 | 1996-05-22 | 张义纲 | Process for preparing active bleaching earth from attapulgite clay |
| CN106554023A (en) * | 2015-09-24 | 2017-04-05 | 刘从荡 | A kind of technique of preparing activated bleaching clay from attapulgite clay |
Non-Patent Citations (2)
| Title |
|---|
| 李锦开: "《中药炮制名词术语辞典》", 31 December 1991, 广东科技出版社 * |
| 杨明韶等: "《草业工程机械学》", 30 November 2013, 中国农业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953025A (en) * | 2021-10-11 | 2022-01-21 | 中铝中州铝业有限公司 | Method for grinding viscous bauxite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107399742A (en) | A kind of preparation technology of ultra-fine montmorillonite | |
| CN110092386B (en) | Method for purifying attapulgite clay | |
| CN102671757B (en) | Method for purifying aedelforsite by pure physical process | |
| CN102337703A (en) | Method for preparing modified calcium sulfate crystal whisker papermaking filler | |
| CN103539400A (en) | Green high-performance concrete with superfine oil palm fruit shell ash | |
| CN110589845A (en) | Method and system for low-cost purification of attapulgite clay | |
| WO2020082528A1 (en) | Preparation method for low-cost and high-whiteness calcined talc | |
| CN112759293A (en) | Concrete admixture, concrete product and preparation method thereof | |
| CN107522501B (en) | Aerated concrete and preparation method thereof | |
| Sarikaya et al. | Production of nano amorphous SiO2 from Malatya pyrophyllite | |
| CN101219794A (en) | Method for lithium based bentonite with dry method | |
| CN108405151A (en) | A kind of dry purification technique of low-grade clay mineral | |
| CN108755246B (en) | Method for preparing papermaking retention aid from low-grade attapulgite | |
| CN104355606A (en) | Corrosion resistant brick | |
| CN1219698C (en) | Production process of nano rod-like active silica with attapulgite and clay | |
| CN108569869A (en) | A kind of high-moisture-retention seepage brick and preparation method thereof prepared by building reworked material | |
| CN108609946A (en) | A kind of high intensity seepage brick and preparation method thereof prepared by building reworked material | |
| EP0059444A2 (en) | Hydraulically setting construction brick, and method for its production | |
| CN115057649B (en) | Concrete expansion toughening anti-cracking agent and preparation method thereof | |
| CN111333406A (en) | Refractory clay clinker prepared from coal slime tailing slag and preparation method thereof | |
| CN102616802A (en) | Method for preparing molecular sieve by using Hangjin 2# soil as raw material and prepared molecular sieve | |
| CN1323974C (en) | Bone material for controllable low-intensity back-filling material and its processing method | |
| Mousharraf et al. | Potential of locally available clay as raw material for traditional-ceramic manufacturing industries | |
| EP2216370A1 (en) | Asphalt | |
| CN102699013B (en) | Pulverized fuel ash comprehensive treatment technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191220 |