CN102765730A - Preparation method of high-performance multipurpose modified bentonite - Google Patents
Preparation method of high-performance multipurpose modified bentonite Download PDFInfo
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- CN102765730A CN102765730A CN2012102715635A CN201210271563A CN102765730A CN 102765730 A CN102765730 A CN 102765730A CN 2012102715635 A CN2012102715635 A CN 2012102715635A CN 201210271563 A CN201210271563 A CN 201210271563A CN 102765730 A CN102765730 A CN 102765730A
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Abstract
The invention relates to a preparation method of high-performance multipurpose modified bentonite. The preparation method of the high-performance multipurpose modified bentonite is mainly applicable to preparation of the modified bentonite from natural calcium-based bentonite by an artificial 'drying' method and is mainly characterized in that ion exchange reaction of the bentonite is achieved at one step by means of the mechanical activation process. The method specifically includes the steps: drying bentonite raw ores and crushing the same into granules in small grain size, then adding the granules into self-made mechanical activation equipment prior to adding a certain amount of modifiers, starting mechanical stirring by setting a certain stirring speed to enable raw materials to react under grinding of ball-milling media, and finally, sieving the generated modified bentonite. By means of control of modifier consumption, reaction time, stirring speed and the like, the multipurpose bentonite applicable to metallurgical pelletizing, casting, well drilling and the like can be prepared. The preparation method of the high-performance multipurpose modified bentonite has the advantages of simple production process and equipment, short production cycle, low cost, high reaction speed, more sufficiency in modification, no pollution, high product performance and the like.
Description
Technical field
The present invention relates to a kind of high-performance multipurpose alta-mud modification method, the technology of particularly a kind of utilization " dry method " preparation modified alta-mud belongs to wilkinite material deep process technology field.
Background knowledge
Wilkinite (Benionite) class of crying again takes off rock or amargosite is a kind of distribution nonmetallic minerals widely; Its staple is a smectite; The montmorillonite mineral crystalline structure belongs to the dioctahedron type; Its crystalline structure unit is to be made up of two-layer silicon-oxy tetrahedron therebetween layer of aluminum oxygen octahedra, belongs to oblique system.Be that the oxygen layer is relative with the oxygen layer between the smectite structure cell, lean on Van der Waals force to connect, reactive force a little less than, so link not closely between structure cell, under the effect of polar molecule or extraneous power, be prone to peel off part Si in the Si-O tetrahedron
4+Ion can be by Al
3+Ionic replacement, the Al in the Al-O octahedron
3+Ion can be by Fe
2+, Mg
2+, Zn
2+Replace Deng positively charged ion.This high isomorphous substitution result between positive ion at a low price causes negative charge superfluous, makes it have absorption positively charged ion and polar water molecules ability.
Bentonitic this unique mineral composition and constitutional features make it have following operational characteristic: wetting ability and swelling property; Dispersiveness and suspension; Cohesiveness and thixotropy; Stability and nontoxicity; Plasticity-etc., wilkinite can be divided into sodium base, calcium base, magnesium base, aluminium (hydrogen) base and potassium base bentonite according to the difference of interlayer adsorbed ion, and common is sodium base and calcium-base bentonite.
Wilkinite is widely used in a plurality of fields such as metallurgical briquetting, casting, drilling well, non-excavation orientation pass through, chemical industry, food, environmental protection, is known as " universal material ", is mainly used in following industry:
Foundry industry, one of topmost purposes is used for foundry sand as tackiness agent exactly in the swelling in metal casting, when casting, sand grains is bonded in one.Wilkinite allows mould to have certain plasticity to change, and avoids because the loss that mould deformation causes, and is injecting molten iron and is keeping the complete of mould when fixed, and can make foundry goods come off out easily.Calcium base soil all can be used as tackiness agent with sodium base soil, but to high pressure moulding and steel casting, precision casting, requires fusing point height, the wearing quality of tackiness agent good, selects for use the sodium base native usually.
Drilling fluid, wilkinite are a kind of materials of drilling well cheaply, and as the additive of drilling mud, it mainly act as: 1. have thixotropism and swelling property, allow heavy prescription to suspend, prevent deposition, guarantee to creep into.2. prevent that gas-liquid from exposing the borehole wall, the firm borehole wall.3. lubricated drill bit.4. in drilling fluid, play emulsifying effect.Be more suitable for the probing of the prospect pit of diamond oil, high pressure gusher, small-bore drilling well and nonresistant strata generally speaking than sodium base soil with calcium base soil.
Metallurgical industry, blast furnace ironmaking general requirement iron ore has certain particle, and preferably globule size is even, and shape is like ball, and is even to guarantee blast-furnace roasting, and ventilation property, Well-recovered reaches the fast purpose of burning of strong wind.Make the iron ore pellets tackiness agent with wilkinite (calcium base soil with sodium base soil all can), can save each 10-15% of solvent and coke, raising blast furnace throughput 40-50%.
Non-excavation orientation is passed through, and is mainly used in various cables in city and natural gas line, when horizontal orientation is constructed, takes waste residue out of with BM, plays lubricated and Gu Bi effect.
Building materials industry; On building materials industry, wilkinite can be used for producing from look silicate cement, light building material, water-proof material (like bentonite waterproof board, clay, sealing rod and bentonite emulsified asphalt water-proof paint etc.), ceramic glaze and senior porcelain, trade sales coating and metal anti-corrosive paint, foam-thermal insulation etc.
Wilkinite is abundant at world saving, is widely distributed.Find out 10,000,000,000 tons of reserves at present nearly, according to statistics, calcium-base bentonite accounts for the 70%-80% of world's geologic reserve, and fine sodium bentonite resource is very limited.China's wilkinite reserves are only second to the U.S., occupy the second place of the world, and in world's smectite resource distribution, ca-montmorillonite accounts for 70%-80%, and natural sodium bentonite content is but very little, 500,000,000 tons of reserves less thaies.China's smectite 90% is a ca-montmorillonite; Because alkalimetal ion has better hydrating capacity than calcium ion; Thereby the basic metal base bentonite is compared with calcium-base bentonite; Have dispersiveness in better swelling property, cationic exchange property, the water medium, colloid index, viscosity, oilness, thermostability, and higher series of advantages such as thixotropy, hot green compression strength and dry-pressing intensity, its application is more extensive, and price is also higher relatively.Thereby the modification of calcium-base bentonite had great significance.
Method of modifying for the natural calcium base bentonite mainly contains at present: suspension method, when joining slurry, in water, add calcium base soil and sodium agent, and long-time prehydration makes more Ca
2+And Mg
2+Cemented out; Stockyard sodium method in the raw ore stockyard, is sprinkling upon water cut greater than in the raw ore in 30% the swelling with sodium agent powder, stirs mix, and mixing rolls, and aging 10 days, is dried and crushed into product then; Extrusion process comprises rolling extrusion process, duplex extrusion process, choked flow extrusion process, pair roller extrusion process etc.The effect of delaminating is played in extruding, makes between the smectite particle, intergranule produces relative movement and separate, thereby has increased and Na
+Contact area, be easy to carry out sufficient IX; All there are a lot of deficiencies in these methods, though for example the stockyard sodium is simple to operate, the production cycle is long, the sodium weak effect; Though the suspension method sodium is effective, the process water amount is big, the production performance difficulty, and discharges the addle contaminate environment; The extruding sodium is high to equipment requirements, and IX is insufficient.Mechanical activation (Mechanical Activation) is meant that solid particulate matter is under mechanical force such as friction, collision, impact, shearing; Crystalline structure and physical and chemical performance are changed; Make part mechanical energy be transformed into the interior ability of material, thereby cause that the solid chemically reactive increases.At present mechanical activation is in the research of the aspect such as synthetic of ultra micro and nanometer powder, nano composite material, strengthened dispersion alloy structured material, refining of metal, mineral and waste treatment, organic materials with use increasingly extensive.Adopt the mechanical activation method that wilkinite is carried out modification; With crossing control activation temperature and soak time, can produce high-performance, multiduty modified product, equipment, technology are simple; Easy to operate; Production process does not have " three wastes " discharging, and production cost is low, helps it and develops towards industrialization, business-like direction.
Summary of the invention
The object of the invention is to provide a kind of high-performance, multi-usage method for preparing modified bentonite; This method is utilized mechanical activating technique that the natural calcium base bentonite is carried out modification to prepare modified alta-mud; Equipment, technology are simple; Easy to operate, production process does not have " three wastes " discharging, advantage such as production cost is low.
Concrete technical scheme of the present invention is following:
(1) dry broken: as bentonite material to be dried to water content between 10%-15% and remove impurity such as contained feldspar, to be broken for the particle of particle diameter then less than 10-20mm;
(2) mechanical activation: load weighted broken bentonite material and properties-correcting agent are added in the homemade mechanical activation equipment that ball-milling medium is housed; Agitator; The beginning stirring reaction; Wherein the properties-correcting agent consumption is the 3-10% of bentonite material, and the reaction times is 20-120 minute, and stirring velocity is 250rpm-450rpm;
(3) sieve: the modified alta-mud that will react gained is crossed the 80-100 mesh sieve;
Described bentonite material is the natural calcium base bentonite, and contained smectite content is not less than 65%;
Described properties-correcting agent is alkali metal sulfates, alkaline carbonate, alkali metal halide or above salt any mixture; Described alkali metallic sodium or potassium;
Described properties-correcting agent alkali metal sulfates comprises sodium sulfate or vitriolate of tartar;
Described properties-correcting agent alkaline carbonate comprises Quilonum Retard, yellow soda ash or salt of wormwood;
Described properties-correcting agent alkali metal halide comprises Sodium Fluoride, Potassium monofluoride, lithium chloride, sodium-chlor, Repone K, Soiodin or potassiumiodide
Described mechanical activation equipment is the agitating ball mill that has mechanical stirrer;
Used grinding media is zirconia ball, the corundum ball of diameter between 5mm-20mm, and the diameter of grinding media is between 5mm-20mm, and ball-to-powder weight ratio is 1: 1-1: 3 (mass ratioes);
A kind of high-performance of the present invention, multi-usage method for preparing modified bentonite have following advantage and effect:
(1) equipment is simple, easy and simple to handle, only needs a mechanical activation equipment in the reaction process of the present invention, and equipment is simple, and is easy and simple to handle;
(2) with short production cycle, instant effect, because ion exchange reaction is disposable completion in mechanical activation equipment, speed of response is fast, operation is short, can realize factory's serialization production, and is with short production cycle, instant effect;
(3) energy consumption is low, and cost is low, and reaction only needs mechanical activation equipment thereby energy consumption low, less investment, and cost is low;
(4) pollution-free, because reaction is to utilize mechanical activating technique " dry method " to produce modified alta-mud, there is not environmental pollution in the non-alkali liquor discharging;
(5) product performance are better; Of many uses; The present invention utilizes solid particulate matter under mechanical force such as friction, collision, impact, shearing, makes part mechanical energy be transformed into the interior ability of material, thereby causes that the solid chemically reactive increases; Sufficient reacting, and can produce the modified alta-mud of different purposes through control stir speed (S.S.) and reaction times etc.;
Embodiment
Below be used to further specify the method that the present invention describes through the practical implementation instance, but do not limit the present invention.
Embodiment 1
Take by weighing smectite content and be 65% calcium-base bentonite raw material 1000g, to be dried to water cut be 10% and remove impurity such as feldspar, and adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is the corundum ball, grinding media particle diameter 5mm; Ball-to-powder weight ratio is 1: 1 (mass ratio), adds 3% yellow soda ash then, starts mechanical stirring and begins reaction; The setting stirring velocity is 250rpm, and the reaction times is 20 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 133mmol/100g, colloid index is 131mL/15g, and expansion capacity is the 26mL/g sodium bentonite.
Embodiment 2
Take by weighing smectite content and be 70% calcium-base bentonite raw material 1000g, to be dried to water cut be 10% and remove impurity such as feldspar, and adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is the corundum ball, grinding media particle diameter 1cm; Ball-to-powder weight ratio is 1: 2 (mass ratio), adds 5% sodium-chlor then, starts mechanical stirring and begins reaction; The setting stirring velocity is 300rpm, and the reaction times is 30 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 135mmol/100g, colloid index is 133mL/15g, and expansion capacity is the 28mL/g sodium bentonite.
Embodiment 3
Taking by weighing smectite content is 70%, calcium-base bentonite raw material 1000g, to be dried to water cut be 13% and remove impurity such as feldspar, adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is a zirconia ball, grinding media particle diameter 1mm; Ball-to-powder weight ratio is 1: 3 (mass ratio), adds 5% sodium sulfate then, starts mechanical stirring and begins reaction; The setting stirring velocity is 300rpm, and the reaction times is 100 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 133mmol/100g, colloid index is 130.3mL/15g, and expansion capacity is the 27mL/g sodium bentonite.
Embodiment 4
Taking by weighing smectite content is 75% calcium-base bentonite raw material 1000g, and to be dried to water cut be 13% and remove impurity such as feldspar, and adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is a zirconia ball, grinding media particle diameter 2cm; Ball-to-powder weight ratio is 1: 2 (mass ratio), adds 3% Repone K then, starts mechanical stirring and begins reaction; The setting stirring velocity is 350rpm, and the reaction times is 120 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 135mmol/100g, colloid index is 132mL/15g, and expansion capacity is the potassium base bentonite of 28mL/g.
Embodiment 5
Taking by weighing smectite content is 75% calcium-base bentonite raw material 1000g, and to be dried to water cut be 15% and remove impurity such as feldspar, and adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is a zirconia ball, grinding media particle diameter 5mm; Ball-to-powder weight ratio is 1: 1 (mass ratio), adds 10% Sodium Fluoride then, starts mechanical stirring and begins reaction; The setting stirring velocity is 400rpm, and the reaction times is 100 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 145.4mmol/100g, colloid index is 138mL/15g, and expansion capacity is the 30mL/g sodium bentonite.
Embodiment 6
Take by weighing smectite content and be 70% calcium-base bentonite raw material 1000g, to be dried to water cut be 15% and remove impurity such as bulk feldspar, and adding crusher in crushing then is the about 1-2cm of diameter left and right sides particle; And add in the self-control mechanical activation equipment, ball-milling medium is the corundum ball, grinding media particle diameter 2cm; Ball-to-powder weight ratio is 1: 3 (mass ratio), adds 8% Quilonum Retard then, starts mechanical stirring and begins reaction; The setting stirring velocity is 450rpm, and the reaction times is 100 minutes, then the gained modified alta-mud is crossed the 80-100 mesh sieve; Obtain inhaling blue amount and be 148mmol/100g, colloid index is 140.2mL/15g, and expansion capacity is the 35mL/g lithium bentonite.
Claims (8)
1. a high-performance, multi-usage method for preparing modified bentonite is characterized in that: be to utilize one step of mechanical activating technique to realize the modification of calcium-base bentonite raw material, specifically comprise the steps.
(1) dry broken: as bentonite material to be dried to water content between 10%-15% and remove impurity such as contained feldspar, to be broken for the particle that particle diameter is 10-20mm then;
(2) mechanical activation: load weighted broken bentonite material and properties-correcting agent are added in the homemade mechanical activation equipment that ball-milling medium is housed; Agitator; The beginning stirring reaction; Wherein the properties-correcting agent consumption is the 3-10% of bentonite material, and the reaction times is 20-120min, and stirring velocity is 250rpm-450rpm;
(3) sieve: the modified alta-mud that will react gained is crossed the 80-100 mesh sieve.
2. a kind of high-performance according to claim 1, multi-usage method for preparing modified bentonite is characterized in that: described bentonite material is the natural calcium base bentonite, and contained smectite content is not less than 65%.
3. a kind of high-performance according to claim 1, multi-usage method for preparing modified bentonite is characterized in that: described properties-correcting agent is alkali metal sulfates, alkaline carbonate, alkali metal halide or above salt any mixture.
4. a kind of high-performance according to claim 3, multi-usage method for preparing modified bentonite is characterized in that: described properties-correcting agent alkali metal sulfates comprises sodium sulfate or vitriolate of tartar.
5. a kind of high-performance according to claim 3, multi-usage method for preparing modified bentonite is characterized in that: described alkaline carbonate comprises Quilonum Retard, yellow soda ash or salt of wormwood.
6. a kind of high-performance according to claim 3, multi-usage method for preparing modified bentonite is characterized in that: described properties-correcting agent alkali metal halide comprises Sodium Fluoride, Potassium monofluoride, sodium-chlor, Repone K, Soiodin or potassiumiodide.
7. a kind of high-performance according to claim 1, multi-usage method for preparing modified bentonite is characterized in that, used mechanical activation equipment is the agitating ball mill that has mechanical stirrer.
8. a kind of high-performance according to claim 1, multi-usage method for preparing modified bentonite; It is characterized in that; Used grinding media is zirconia ball or corundum ball in the step (2), and the diameter of grinding media is between 5mm-20mm, and ball-to-powder weight ratio is 1: 1-1: 3 (mass ratioes).
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| CN103804953A (en) * | 2013-12-10 | 2014-05-21 | 辽宁亿龙矿业股份有限公司 | Method for preparing ultrafine surface modified dolomite |
| CN103896291A (en) * | 2012-12-25 | 2014-07-02 | 冯安冬 | Sodium modification process of bentonite and production device thereof |
| CN103949205A (en) * | 2014-04-29 | 2014-07-30 | 桂林理工大学 | Preparation method and application of nanometer mixed-layer-assembled clay mineral material |
| CN104591198A (en) * | 2015-01-29 | 2015-05-06 | 陈辉平 | Method for preparing polymer thickening, viscosity-increasing anti-settling and lubricating anti-seepage agent from yellow clay |
| CN105295858A (en) * | 2015-11-26 | 2016-02-03 | 天津滨海新区普瑞德石油科技有限公司 | Tackifier for oil-based drilling fluid |
| CN105312089A (en) * | 2015-06-10 | 2016-02-10 | 广西大学 | Method for preparing heteropolyacid-iron bentonite through mechanical activating, strengthening, steeping and adsorbing |
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| 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 |
| CN107282865A (en) * | 2017-08-30 | 2017-10-24 | 马鞍山市三川机械制造有限公司 | A kind of bentonitic Automobile flywheel casting sand of bismuth-containingization |
| 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 |
| CN109971491A (en) * | 2019-04-26 | 2019-07-05 | 王勇 | A kind of engineering slurry bentonite in powder and its production and processing method |
| CN110003786A (en) * | 2019-04-17 | 2019-07-12 | 谭建军 | Building decoration waterproof and heat-insulating coating |
| CN110117421A (en) * | 2019-04-19 | 2019-08-13 | 南京交通工程有限公司 | A kind of modification of expansive soil agent |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103896291A (en) * | 2012-12-25 | 2014-07-02 | 冯安冬 | Sodium modification process of bentonite and production device thereof |
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| CN104591198A (en) * | 2015-01-29 | 2015-05-06 | 陈辉平 | Method for preparing polymer thickening, viscosity-increasing anti-settling and lubricating anti-seepage agent from yellow clay |
| CN105312089A (en) * | 2015-06-10 | 2016-02-10 | 广西大学 | Method for preparing heteropolyacid-iron bentonite through mechanical activating, strengthening, steeping and adsorbing |
| CN105295858A (en) * | 2015-11-26 | 2016-02-03 | 天津滨海新区普瑞德石油科技有限公司 | Tackifier for oil-based drilling fluid |
| 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 |
| CN107282865A (en) * | 2017-08-30 | 2017-10-24 | 马鞍山市三川机械制造有限公司 | A kind of bentonitic Automobile flywheel casting sand of bismuth-containingization |
| 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 |
| CN110003786A (en) * | 2019-04-17 | 2019-07-12 | 谭建军 | Building decoration waterproof and heat-insulating coating |
| CN110117421A (en) * | 2019-04-19 | 2019-08-13 | 南京交通工程有限公司 | A kind of modification of expansive soil agent |
| CN109971491A (en) * | 2019-04-26 | 2019-07-05 | 王勇 | A kind of engineering slurry bentonite in powder and its production and processing method |
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Inventor after: Huang Kelin Inventor after: Li Kexian Inventor after: Peng Xiaoyu Inventor after: Jia Yanhua Inventor after: Wu Rui Inventor after: Ruan Fuxian Inventor after: Xie Qingruo Inventor after: Wei Yongcheng Inventor after: Tao Jing Inventor after: Gan Jiwen Inventor after: Wang Ben Inventor after: Wang Zefen Inventor before: Huang Kelin Inventor before: Li Kexian Inventor before: Peng Xiaoyu Inventor before: Jia Yanhua Inventor before: Wu Rui Inventor before: Ruan Fuxian Inventor before: Xie Qingruo Inventor before: Wei Yongcheng Inventor before: Tao Jing Inventor before: Gan Jiwen Inventor before: Wang Ben Inventor before: Wang Zefen |
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Application publication date: 20121107 |