CN103663481A - Purification technology for low-grade bentonite - Google Patents
Purification technology for low-grade bentonite Download PDFInfo
- Publication number
- CN103663481A CN103663481A CN201310569489.XA CN201310569489A CN103663481A CN 103663481 A CN103663481 A CN 103663481A CN 201310569489 A CN201310569489 A CN 201310569489A CN 103663481 A CN103663481 A CN 103663481A
- Authority
- CN
- China
- Prior art keywords
- low
- wilkinite
- grade bentonite
- ore pulp
- fine powder
- 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
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
The invention provides a purification technology for low-grade bentonite, belonging to the field of processing and utilization of non-metal ores. The purification technology comprises the following steps of preprocessing the raw materials; stirring to prepare pulp; ultrasonically purifying; standing for precipitating; separating out upper-layer slurry; removing impurities through centrifuging; filtering and drying. The purification technology is supported by ultrasonic waves; in the presence of a dispersing agent, the impurities can be well separated from montmorillonite, so that the purification effect is improved; furthermore, the purification technology is simple, is small in equipment investment, can be used for purifying the product with high content of montmorillonite from the low-grade bentonite rapidly, efficiently, simply and conveniently, has the advantages of low production cost and short purification period, and is easy to popularize.
Description
Technical field
The invention belongs to nonmetalliferous ore processing and utilization field, be specifically related to a kind of purifying technique of low-grade bentonite.
Background technology
Wilkinite is to take montmorillonite as main moisture clay pit.The chemical composition of montmorillonite is: (Al2, Mg3) Si4O10 OH2nH2O, because it has special character, as swelling, cohesiveness, adsorptivity, catalytic, thixotropy, suspension and cationic exchange etc., is widely used in each industrial circle.
According to statistics, China's bentonite resource is nearly 8,000,000,000 tons of proven reserve at present, and resource is very abundant, but is mainly low-grade bentonite resource, and exploitation degree is low.In low-grade bentonite, the content of clay mineral montmorillonite is substantially between 40～70%, and remaining is non-clay mineral quartz, feldspar etc., is therefore difficult to carry out deep processing, more cannot be directly used in production fine chemical product.So, before wilkinite deep processing, must first purify.
Current roc is moistened native method of purification and mainly contains dry method and wet method.Dry method is mainly applicable to the raw ore purification that smectite content is greater than 80%, its principle is as the hardness of quartz, feldspar etc. and density features large compared with montmorillonite all according to impurity in wilkinite, in air by separate and subside step by step by impurity separate, separation, but the quality of the method purifying montmorillonite is wayward.In raw ore, smectite content is 30～80%, or contained feldspar, wilkinite that quartz granularity is less, should adopt wet purification, its principle is according to the characteristic of roc profit soil easy expansion in water, utilizes gangue mineral and montmorillonite density variation, by the method for gravity treatment, impure mineral is carried out to segregation excision.
Wet purification mainly contains two kinds of natural sedimentation, supercentrifugal process.Natural sedimentation is called again WATER-WASHING METHOD, and it is different according to montmorillonite in roc profit soil and impurity density, and the tiny principle that can fully disperse in medium of montmorillonite product born of the same parents is separated impurity and montmorillonite.The advantage of the method is that required equipment is simple, less investment, and to receiving, base soil refining effect is better, and shortcoming is that the purification cycle is long, and productive rate is low, and manufacturer's occupation area of equipment is larger, undesirable to calcium base soil refining effect.Supercentrifugal process is to utilize bentonite slurry under the effect of high speed centrifugation power, and granularity is thrown to separates walls and removes compared with large gritty particle compared with large, density, and then wilkinite is purified.Under different rotating speeds, flow, carry out separation, can obtain the wilkinite of different purity, compare with natural sedimentation, the advantage of this method is that the purification cycle is short, production serialization, and occupation area of equipment is little, be applicable to industrial demand, but will consume a considerable amount of energy, cost for purification is higher.Generally, existing wet purification technology is not a kind of desirable method of purification.For this reason, Chinese patent (CN 102452656 A) discloses a kind of method of purification of low-grade bentonite, this technology adopts the method for physics, chemofacies combination, pulverizing by raw ore and screening, disperse slurrying, Swirling flow sand-removing, centrifugal removal of impurities, by the highly purified wilkinite ore pulp obtaining filter, dry and break up depolymerization and obtain highly purified wilkinite product.But the method technique more complicated, is not suitable for industrial application.
Summary of the invention
For low-grade bentonite purifying technique in prior art, have that the purification cycle is long, cost is high and the shortcoming of complex process, adopt that ultrasonic wave is auxiliary purifies, a kind of purifying technique of low-grade bentonite is provided.This purifying technique is simple, the cycle is short, can obtain the higher roc of purity profit native produce, for the exploitation of low-grade bentonite provide an economy, effective, practical approach.
Concrete, the purifying technique of low-grade bentonite of the present invention, includes following steps:
(1) raw materials pretreatment: raw material low-grade bentonite is carried out to pulverization process, obtain the wilkinite fine powder that granularity is-0.074mm;
(2) stirring pulping: wilkinite fine powder is mixed for 1:5～7 by weight with water, then add the dispersion agent of wilkinite fine powder weight 0.4～0.6%, stir, make ore pulp:
(3) ultrasonic wave is purified: ore pulp is used ultrasonic wave continuous action 20～35min under 40～80 ℃ of conditions;
(4) standing sedimentation, separated upper strata slurries: the ore pulp after ul-trasonic irradiation is standing, make its natural subsidence 20～35min, isolate upper strata slurries;
(5) centrifugal removal of impurities: upper strata slurries are centrifugal, remove impurity, obtain supernatant liquor;
(6) filter, be dried: by supernatant liquid filtering, dry, pulverizing, obtain the wilkinite after purification.
Described in above technique of the present invention, the smectite content of low-grade bentonite is below 70%.
Described dispersion agent is one or more combinations in Sodium hexametaphosphate 99, trisodium phosphate or water glass, preferred Sodium hexametaphosphate 99, and consumption is 0.5% of wilkinite fine powder weight.
Further, in step (3), preferably ore pulp is used the technique of ultrasonic wave continuous action 30min under 50 ℃ of conditions.
Further, centrifugal rotational speed is 1500～2500r/min in step (5), and the time is 6～8min, and preferably rotating speed is 1800 r/min, the time processing parameter that is 8min.
Compared with prior art, the present invention has the following advantages and positively effect:
(1) the present invention adopts ultrasonic wave to assist a ruler in governing a country the method for purification, under the effect of dispersion agent, makes the impurity can better be separated with montmorillonite, has improved refining effect.
(2) technique of the present invention is simple, low for equipment requirements (only needing traditional wet purification process), can be fast, efficiently, easily with purify out the finished product of high smectite content of low-grade bentonite, production cost is low, the purification cycle is short.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, the present embodiment is only that the present invention is done to clearer explanation, rather than limitation of the present invention.
Embodiment 1
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 62% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 500g water, then adds 0.5g dispersion agent hexa metaphosphoric acid, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 50 ℃ of continuous action 30min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 30min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 1800r/min, and the time is 8min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 95.12%.
Embodiment 2
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 67% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 600g water, then adds 0.5g dispersion agent trisodium phosphate, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 80 ℃ of continuous action 20min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 20min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 2000r/min, and the time is 7min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 94.78%.
Embodiment 3
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 55% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 500g water, then adds 0.6g dispersion agent water glass, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 60 ℃ of continuous action 25min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 35min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 2500r/min, and the time is 6min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 92.72%.
Embodiment 4
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 47% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 500g water, then adds 0.5g dispersion agent hexa metaphosphoric acid, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 50 ℃ of continuous action 30min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 35min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 2000r/min, and the time is 7min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 91.23%.
Embodiment 5
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 63% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 700g water, then adds 0.4g dispersion agent hexa metaphosphoric acid, trisodium phosphate, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 65 ℃ of continuous action 25min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 30min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 2000r/min, and the time is 7min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 93.41%.
Embodiment 6
The first step, by raw material low-grade bentonite raw ore (smectite content approximately 58% adopt to be inhaled blue amount method and measured) pulverize, ore grinding, obtain the wilkinite fine powder that granularity is-0.074mm.Second step, gets 100g wilkinite fine powder and mixes with 550g water, then adds 0.5g dispersion agent hexa metaphosphoric acid, water glass, is placed in together agitator and stirs, and makes ore pulp.The 3rd step, is placed in the lower 45 ℃ of continuous action 35min of Ultrasonic Conditions by the ore pulp mixing, and accelerates the effect of dispersion agent and ore pulp, separating impurity.The 4th step, standing ore pulp, makes its natural subsidence 25min, isolates supernatant slurries.The 5th step, adopts whizzer by the centrifugation of supernatant slurries, and centrifugal rotational speed is 1500r/min, and the time is 8min, removes impurity.The 6th step, filters supernatant liquor through filter, filter to obtain filter cake and further spray dryly, then adopts pulverizer pulverizing, the wilkinite after being purified.Wilkinite after purification is measured through inhaling blue amount method, and the massfraction that records montmorillonite in wilkinite is 93.37%.
Claims (7)
1. a purifying technique for low-grade bentonite, is characterized in that, comprises the following steps:
(1) raw materials pretreatment: raw material low-grade bentonite is carried out to pulverization process, obtain the wilkinite fine powder that granularity is-0.074mm;
(2) stirring pulping: wilkinite fine powder is mixed for 1:5～7 by weight with water, then add the dispersion agent of wilkinite fine powder weight 0.4～0.6%, stir, make ore pulp:
(3) ultrasonic wave is purified: ore pulp is used ultrasonic wave continuous action 20～35min under 40～80 ℃ of conditions;
(4) standing sedimentation, separated upper strata slurries: the ore pulp after ul-trasonic irradiation is standing, make its natural subsidence 20～35min, isolate upper strata slurries;
(5) centrifugal removal of impurities: upper strata slurries are centrifugal, remove impurity, obtain supernatant liquor;
(6) filter, be dried: by supernatant liquid filtering, dry, pulverizing, obtain the wilkinite after purification.
2. the purifying technique of low-grade bentonite according to claim 1, is characterized in that, the smectite content of described low-grade bentonite is below 70%.
3. the purifying technique of low-grade bentonite according to claim 1, is characterized in that, described dispersion agent is one or more combinations in Sodium hexametaphosphate 99, trisodium phosphate or water glass, and consumption is 0.5% of wilkinite fine powder weight.
4. according to the purifying technique of the low-grade bentonite described in claim 1 or 3, it is characterized in that, described dispersion agent is Sodium hexametaphosphate 99, and consumption is 0.5% of wilkinite fine powder weight.
5. the purifying technique of low-grade bentonite according to claim 1, is characterized in that, in (3) step, ore pulp is used ultrasonic wave continuous action 30min under 50 ℃ of conditions.
6. the purifying technique of low-grade bentonite according to claim 1, is characterized in that, in (5) step, centrifugal rotational speed is 1500～2500r/min, and the time is 6～8min.
7. according to the purifying technique of the low-grade bentonite described in claim 1 or 6, it is characterized in that, described centrifugal rotational speed is 1800 r/min, and the time is 8min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569489.XA CN103663481A (en) | 2013-11-13 | 2013-11-13 | Purification technology for low-grade bentonite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569489.XA CN103663481A (en) | 2013-11-13 | 2013-11-13 | Purification technology for low-grade bentonite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103663481A true CN103663481A (en) | 2014-03-26 |
Family
ID=50302388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310569489.XA Pending CN103663481A (en) | 2013-11-13 | 2013-11-13 | Purification technology for low-grade bentonite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103663481A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731479A (en) * | 2014-12-30 | 2016-07-06 | 韩国地质资源研究院 | Method of removing hydrous silica from bentonite |
| CN106745014A (en) * | 2017-01-24 | 2017-05-31 | 湘潭大学 | A kind of method of purification of low taste sepiolite |
| CN107051715A (en) * | 2017-05-22 | 2017-08-18 | 句容康泰膨润土有限公司 | The enrichment method of low-grade bentonite |
| CN108405152A (en) * | 2018-03-20 | 2018-08-17 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of dry purification technique of low-grade bentonite |
| CN108405151A (en) * | 2018-03-20 | 2018-08-17 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of dry purification technique of low-grade clay mineral |
| CN108910905A (en) * | 2018-09-28 | 2018-11-30 | 芜湖市鹏磊新材料有限公司 | A kind of the ultrasound centrifugation purification and sodium base method of low-grade bentonite |
| CN111214958A (en) * | 2020-01-17 | 2020-06-02 | 中山大学 | Method for extracting soil rare earth nanoparticles |
| CN113683095A (en) * | 2021-09-26 | 2021-11-23 | 苏州中材非金属矿工业设计研究院有限公司 | Method for purifying natural sodium bentonite containing cristobalite |
-
2013
- 2013-11-13 CN CN201310569489.XA patent/CN103663481A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10364155B2 (en) * | 2014-12-30 | 2019-07-30 | Korea Institute Of Geoscience And Mineral Resources | Method of removing hydrous silica from bentonite |
| CN105731479B (en) * | 2014-12-30 | 2018-01-02 | 韩国地质资源研究院 | The method that hydrated SiO 2 is removed from bentonite |
| CN105731479A (en) * | 2014-12-30 | 2016-07-06 | 韩国地质资源研究院 | Method of removing hydrous silica from bentonite |
| CN106745014A (en) * | 2017-01-24 | 2017-05-31 | 湘潭大学 | A kind of method of purification of low taste sepiolite |
| CN107051715A (en) * | 2017-05-22 | 2017-08-18 | 句容康泰膨润土有限公司 | The enrichment method of low-grade bentonite |
| CN108405152B (en) * | 2018-03-20 | 2020-07-10 | 苏州中材非金属矿工业设计研究院有限公司 | Dry purification process of low-grade bentonite |
| CN108405151A (en) * | 2018-03-20 | 2018-08-17 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of dry purification technique of low-grade clay mineral |
| CN108405152A (en) * | 2018-03-20 | 2018-08-17 | 苏州中材非金属矿工业设计研究院有限公司 | A kind of dry purification technique of low-grade bentonite |
| CN108405151B (en) * | 2018-03-20 | 2020-07-10 | 苏州中材非金属矿工业设计研究院有限公司 | Dry purification process of low-grade clay mineral |
| CN108910905A (en) * | 2018-09-28 | 2018-11-30 | 芜湖市鹏磊新材料有限公司 | A kind of the ultrasound centrifugation purification and sodium base method of low-grade bentonite |
| CN111214958A (en) * | 2020-01-17 | 2020-06-02 | 中山大学 | Method for extracting soil rare earth nanoparticles |
| CN111214958B (en) * | 2020-01-17 | 2022-07-19 | 中山大学 | Method for extracting soil rare earth nanoparticles |
| CN113683095A (en) * | 2021-09-26 | 2021-11-23 | 苏州中材非金属矿工业设计研究院有限公司 | Method for purifying natural sodium bentonite containing cristobalite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103663481A (en) | Purification technology for low-grade bentonite | |
| CN102205972B (en) | Modification method of attapulgite | |
| CN102452656A (en) | Method for purifying low-grade bentonite | |
| CN102060938B (en) | Method for extracting algin through comprehensively utilizing brown algae | |
| CN103288116B (en) | Method for preparing high-purity calcium hydroxide from carbide slag | |
| CN103359748A (en) | Activating treatment of bentonite | |
| CN113683095B (en) | Method for purifying natural sodium bentonite containing cristobalite | |
| CN103086383B (en) | Preparation method of high-quality diatomaceous earth product | |
| CN101711973A (en) | Preparation method of modified attapulgite particle retention and filtration aid | |
| CN101318685A (en) | Method for preparing ultra-fine active nano-calcium carbonate with low-ore grade limestone activation of activation tank | |
| CN101987480A (en) | Preparation method of non-pickling raw kaolin ore | |
| CN105597679A (en) | Method of using low-quality short fiber sepiolite for preparing high-performance adsorbing material | |
| CN107673367A (en) | A kind of gangue prepares method and the application of magnetic 5A molecular sieves | |
| CN107805043B (en) | Method for preparing kaolin for medium-high grade ceramics from fine tailings and poor-quality kaolin | |
| CN102675082B (en) | Preparation method of calcium propionate by egg shell | |
| CN107089786B (en) | Method for improving municipal sludge dewatering effect by using aluminum ash | |
| CN102259874B (en) | Method for preparing white carbon black by continuous carbon precipitation | |
| CN106517277A (en) | Method for producing aluminum oxide co-production silicon fertilizer from bauxite | |
| CN105149084A (en) | Dry-wet-method mineral separation method used for African sandy diatomite ore | |
| CN105986513B (en) | A kind of functional filler auxiliary agent for field of papermaking | |
| CN106745014A (en) | A kind of method of purification of low taste sepiolite | |
| CN108588409B (en) | A kind of floating tail-coal base metallurgical briquetting binder and preparation method thereof | |
| CN107285512A (en) | A kind of method and system of Treatment of Wastewater in Coking | |
| CN103011230B (en) | Low-cost method for preparing nano calcium sulfate | |
| CN103213998A (en) | Purification method for improving purity of bentonite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |