CN102452656A - Method for purifying low-grade bentonite - Google Patents
Method for purifying low-grade bentonite Download PDFInfo
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- CN102452656A CN102452656A CN2010105169215A CN201010516921A CN102452656A CN 102452656 A CN102452656 A CN 102452656A CN 2010105169215 A CN2010105169215 A CN 2010105169215A CN 201010516921 A CN201010516921 A CN 201010516921A CN 102452656 A CN102452656 A CN 102452656A
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- wilkinite
- bentonite
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Abstract
The invention relates to a method for purifying low-grade bentonite, and belongs to the technical field of inorganic nonmetallic ores. A physical and chemical combined method is adopted. The method comprises the following steps of: grinding a raw ore, sieving, dispersing and pulping, performing rotational flow sand removal and centrifugal dust removal, filtering the obtained high-purity bentonite pulp, drying, scattering and depolymerizing to obtain a high-purity bentonite product. By the method, the low-grade bentonite can be purified, and bentonite with over 95 percent of montmorillonite is obtained.
Description
Technical field:
The invention belongs to inorganic non-metallic ore deposit technical field, be specifically related to a kind of method of purification of low-grade bentonite.Utilize this method to purify, obtain smectite content, be used for bentonitic deep processing greater than 95% wilkinite to low-grade bentonite.
Background technology:
Wilkinite is to be main moisture clay pit with the smectite, molecular formula: Na
x(H
2O)
4(Al
2-XMg
0.83) Si
4O
10) (OH)
2, because it has special nature, as: swelling property, cohesiveness, adsorptivity, catalytic, thixotropy, suspension and cationic exchange property or the like; Be widely used in each industrial circle, people are referred to as " omnipotent soil ".
Bentonite ore is the mineral products of one kind of multiple purposes, and its quality and Application Areas depend primarily on wherein smectite content and attribute type and crystal chemistry characteristic thereof.The pure wilkinite of matter is rare, wherein all contains the impurity of inequality, and like quartz, feldspar, mica, zeolite etc., its purity is because of place of production difference to some extent.Smectite content is generally 30%～80%, density 2.4～2.8,1330 ℃～1430 ℃ of fusing points.
The Purification of Swelled-ground is divided into physical purification method and chemical purification method.Physical purification method and ore dressing method of purification generally can be divided into two types of dry method and wet methods.Dry method is all bigger according to impure mineral granularity, hardness and density in the natural montmorillonite, separates impurity through component sedimentation step by step, and obtains the very high wilkinite of purity.Wet method then is to be main media with water, through imposing various external force (centrifugal, chemical reagent), utilizes the different of smectite and impurity density in the wilkinite, and impurity and smectite are separated, and reaches refining effect.
Dry purification
Dry method is present main ore dressing traditional method both domestic and external; This method is applicable to that smectite content is in the bentonitic ore dressing more than 80%; Dry method is all bigger according to impure mineral granularity, hardness and density in the natural montmorillonite; Separate impurity through component sedimentation step by step, and obtain the very high wilkinite of purity.This method refining effect is better, and smectite content reaches more than 99% in the back wilkinite of purifying, and the recovery of smectite is very high, can reach 95%.
Dry method is owing to have relatively high expectations to the raw material smectite content, and only at 30～80% low-grade bentonite, its application receives certain restriction, is difficult to obtain highly purified wilkinite for smectite content.
Wet purification
For smectite content in the raw ore is not very big wilkinite in 30～80% low-grade bentonite or contained feldspar, quartzy granularity only, obtain more highly purified wilkinite or smectite, often adopts wet purification.Mainly contain natural sedimentation, supercentrifugal process etc.
Natural sedimentation is called WATER-WASHING METHOD again; It is according to different (the smectite density 2～2.2 of smectite in the wilkinite with impurity density; Impurity densities such as quartz about 2.6), and tiny can be in the water medium abundant dispersive principle of smectite article born of the same parents impurity and smectite are separated.The advantage of this method is that required equipment is simple, invests lessly, and better to sodium base soil refining effect, shortcoming is that the purification time is long, and productive rate is low, and manufacturer's occupation area of equipment is bigger, and is undesirable to the native refining effect of calcium base.
Supercentrifugal process is to utilize bentonite slurry under the effect of high speed centrifugation power, and granularity gritty particle big, that density is bigger is thrown to separates walls and removed, and then makes wilkinite obtain purifying.Under different rotating speeds, flow, separate, can obtain the wilkinite of different purity, compare with natural sedimentation; The advantage of this method is that the purification cycle is short, the production serialization, and occupation area of equipment is little; Be fit to industrial needs, but will consume a considerable amount of energy, cost for purification is higher.
Summary of the invention:
The objective of the invention is: the method for purification that propose a kind of low-grade bentonite; Adopt physics, chemofacies bonded method; Low-grade bentonite is purified, obtain the higher wilkinite product of purity, for bentonitic further deep processing improves the fine raw material.
Technical scheme of the present invention is:
A kind of method of purification of low-grade bentonite, realized by following steps:
1. the pulverizing of raw ore and screening: the wilkinite raw ore is crushed to less than 5mm, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders;
2. dispersion slurrying: finished wilkinite powder is added water and dispersion agent, adopt percussion flow to process 10%～25% ore pulp;
3. eddy flow desanding: adopt hydrocyclone to separate and remove sand setting;
4. centrifugal removal of impurities: the ore pulp after the desanding gets into the centrifugal settling separating machine of high speed rotating, further separating impurity;
5. the highly purified wilkinite ore pulp that will obtain filters, dry and break up depolymerization and obtain highly purified wilkinite product.
Usually, the inventive method adopts jaw crushing crusher machine raw ore; Dispersion agent is a phosphoric acid salt, by wilkinite, adds the phosphoric acid salt of weight percentage 0.5%～1.0%, comprises sodium-metaphosphate or trisodium phosphate etc.; The beater tup that disperses slurrying to adopt the percussion flow principle to process.
Characteristics of the present invention:
1. adopt the Raymond mill ore grinding, wilkinite is processed into thinner particle, favourable and dispersion slurrying.
2. add dispersion agent (mainly being phosphoric acid salt), destroy " worker " font associative structure that smectite forms in water medium, and adopt percussion flow to make the abundant aquation of wilkinite, make fine-grained solids impurity lose rest, separate with smectite.
3. adopt high speed centrifugal settling separating machine, separate impurity such as fine-grained carbonate and feldspar.
Embodiment:
Further specify content of the present invention below in conjunction with embodiment:
Embodiment 1
Wilkinite raw ore (smectite content 70%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get 1000g wilkinite powder, join in a certain amount of water, be made into the slip of solid content 25%, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and leaves standstill bentonite slurry for some time, shifts out the bentonite slurry on upper strata then.The upper strata bentonite slurry that shifts out is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture,, dried product is ground, promptly obtain the wilkinite of purifying in drying in oven.Bentonitic smectite content 97.2% after purifying.
Embodiment 2
Wilkinite raw ore (smectite content 56%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get 1000g wilkinite powder, join in a certain amount of water, be made into the slip of solid content 15%, add the Sodium hexametaphosphate 99 of 5g, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and leaves standstill bentonite slurry for some time, shifts out the bentonite slurry on upper strata then.The upper strata bentonite slurry that shifts out is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture,, dried product is ground, promptly obtain the wilkinite of purifying in drying in oven.Bentonitic smectite content 95.3% after purifying.
Embodiment 3
Wilkinite raw ore (smectite content 61%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get a certain amount of wilkinite powder, join in a certain amount of water, be made into the slip of solid content 15%, add the trisodium phosphate of 8g, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and leaves standstill bentonite slurry for some time, shifts out the bentonite slurry on upper strata then.The upper strata bentonite slurry that shifts out is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture,, dried product is ground, promptly obtain the wilkinite of purifying in drying in oven.Bentonitic smectite content 95.8% after purifying.
Embodiment 4
Wilkinite raw ore (smectite content 56%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get 1000g wilkinite powder, join in a certain amount of water, be made into the slip of solid content 10%, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and squeezes into the swirler-separation and removes sand setting, then the bentonite slurry behind the sand setting is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture, in drying in oven, dried product is ground, and promptly obtains the wilkinite of purifying.Bentonitic smectite content 96.8% after purifying.
Embodiment 5
Wilkinite raw ore (smectite content 61%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get 1000g wilkinite powder, join in a certain amount of water, be made into the slip of solid content 20%, add the Sodium hexametaphosphate 99 of 8g, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and squeezes into the swirler-separation and removes sand setting, then the bentonite slurry behind the sand setting is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture, in drying in oven, dried product is ground, and promptly obtains the wilkinite of purifying.Bentonitic smectite content 97.5% after purifying.
Embodiment 6
Wilkinite raw ore (smectite content 43%) is crushed to less than 5mm with jaw crusher, uses the Raymond mill ore grinding again, obtain the above powder of 200 orders.Get 1000g wilkinite powder, join in a certain amount of water, be made into the slip of solid content 10%, add the Sodium hexametaphosphate 99 of 10g, adopt percussion flow beater tup high speed dispersion, stir the companion, process the bentonite slurry of certain solid-to-liquid ratio.Stirring finishes, and squeezes into the swirler-separation and removes sand setting, then the bentonite slurry behind the sand setting is separated at the centrifugal settling separating machine, behind the removal large quantity of moisture, in drying in oven, dried product is ground, and promptly obtains the wilkinite of purifying.Bentonitic smectite content 96.5% after purifying.
Claims (3)
1. the method for purification of a low-grade bentonite; Adopt physics, chemofacies bonded method; Low-grade bentonite is purified, obtain the higher wilkinite product of purity, it is characterized in that accomplishing the pulverizing and the screening of (1) raw ore: the wilkinite raw ore is crushed to less than 5mm through following steps; Use the Raymond mill ore grinding again, obtain the above powder of 200 orders; (2) disperse slurrying: finished wilkinite powder is added water and dispersion agent, and dispersion agent is a phosphoric acid salt, and by the wilkinite weight percentage, phosphatic add-on is 0.5%～1.0%, adopts percussion flow to process the ore pulp of weight percentage 10%～25%; (3) eddy flow desanding: adopt hydrocyclone to separate and remove sand setting; (4) centrifugal removal of impurities: the ore pulp after the desanding gets into the centrifugal settling separating machine of high speed rotating, further separating impurity; The highly purified wilkinite ore pulp that (5) will obtain filters, dry and break up depolymerization and obtain highly purified wilkinite product.
2. the method for purification of low-grade bentonite according to claim 1 is characterized in that said phosphoric acid salt is sodium-metaphosphate or trisodium phosphate.
3. the method for purification of low-grade bentonite according to claim 1 is characterized in that the beater tup that disperses slurrying to adopt the percussion flow principle to process.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043675A (en) * | 2013-01-15 | 2013-04-17 | 上思县文德矿业科技咨询服务有限公司 | Preparation method of Eamonn mixed layer clay micro-manometer material |
| CN104944430A (en) * | 2014-03-31 | 2015-09-30 | 中国地质大学（北京） | Novel technique for preparing high-purity montmorillonite by deeply purifying bentonite |
| CN106269215A (en) * | 2016-07-26 | 2017-01-04 | 长春工业大学 | A kind of method being produced Erie's stone powder by illite clay ore deposit |
| CN106395866A (en) * | 2016-08-31 | 2017-02-15 | 合肥中科阻燃新材料有限公司 | Method for preparing modified magnesium hydroxide fire retardant from low grade brucite |
| 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 |
| CN107138258A (en) * | 2017-05-22 | 2017-09-08 | 句容康泰膨润土有限公司 | The dry method enrichment method of low-grade bentonite |
| CN108262153A (en) * | 2018-01-18 | 2018-07-10 | 安徽国创非金属矿业科技有限公司 | Reduce method of the siliceous particles to bentonite gel extraction centrifuge abrasion |
| 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 |
| CN117446815A (en) * | 2023-11-07 | 2024-01-26 | 佛山市顺德区特普高实业有限公司 | Method for preparing montmorillonite with low ferric oxide content and application thereof |
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| CN101230210A (en) * | 2007-12-28 | 2008-07-30 | 河北工业大学 | Method for preparing organic modified silicate mineral clay |
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2010
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| CN1880265A (en) * | 2005-06-14 | 2006-12-20 | 吕宪俊 | Bentonite purification process |
| CN101230210A (en) * | 2007-12-28 | 2008-07-30 | 河北工业大学 | Method for preparing organic modified silicate mineral clay |
| CN101224894A (en) * | 2008-01-23 | 2008-07-23 | 苏州中材非金属矿工业设计研究院有限公司 | Method for preparing heavy-viscous organophilic bentonite |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043675A (en) * | 2013-01-15 | 2013-04-17 | 上思县文德矿业科技咨询服务有限公司 | Preparation method of Eamonn mixed layer clay micro-manometer material |
| CN104944430A (en) * | 2014-03-31 | 2015-09-30 | 中国地质大学（北京） | Novel technique for preparing high-purity montmorillonite by deeply purifying bentonite |
| CN106269215A (en) * | 2016-07-26 | 2017-01-04 | 长春工业大学 | A kind of method being produced Erie's stone powder by illite clay ore deposit |
| CN106269215B (en) * | 2016-07-26 | 2018-11-13 | 长春工业大学 | A method of illite powder is produced by illite clay mine |
| CN106395866A (en) * | 2016-08-31 | 2017-02-15 | 合肥中科阻燃新材料有限公司 | Method for preparing modified magnesium hydroxide fire retardant from low grade brucite |
| CN106395866B (en) * | 2016-08-31 | 2018-02-13 | 合肥中科阻燃新材料有限公司 | A kind of low-grade shepardite prepares modified magnesium hydroxide flame retardant agent method |
| 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 |
| CN107138258A (en) * | 2017-05-22 | 2017-09-08 | 句容康泰膨润土有限公司 | The dry method enrichment method of low-grade bentonite |
| CN107138258B (en) * | 2017-05-22 | 2019-06-21 | 句容康泰膨润土有限公司 | The dry method enrichment method of low-grade bentonite |
| CN108262153A (en) * | 2018-01-18 | 2018-07-10 | 安徽国创非金属矿业科技有限公司 | Reduce method of the siliceous particles to bentonite gel extraction centrifuge abrasion |
| 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 |
| CN117446815A (en) * | 2023-11-07 | 2024-01-26 | 佛山市顺德区特普高实业有限公司 | Method for preparing montmorillonite with low ferric oxide content and application thereof |
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Application publication date: 20120516 |