CN100579903C - Method for purifying and processing attapulgite clay mineral - Google Patents
Method for purifying and processing attapulgite clay mineral Download PDFInfo
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- CN100579903C CN100579903C CN200710060489A CN200710060489A CN100579903C CN 100579903 C CN100579903 C CN 100579903C CN 200710060489 A CN200710060489 A CN 200710060489A CN 200710060489 A CN200710060489 A CN 200710060489A CN 100579903 C CN100579903 C CN 100579903C
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Abstract
The invention relates to a purifying and processing method of attapulgite clay minerals, which belongs to the technical field of the wet separating technique of minerals. The specific steps comprise utilizing spiral classifier for primary purification, utilizing cyclone classifier for secondary purification, employing gravity separation equipment for three-stage purification, concentration, drying and disintegration, thereby preparing ultrafine powders of the purified attapulgite clay minerals with the average particle size of 0.93-2.0 micron, and particle size of the largest particle is 3.5-5.0 micron. The method employs spiral classifier to remove the partly impure minerals with bigger particles in raw ores in advance, reinforcing the dispersion effect and the difference of suspension property of the attapulgites and impure minerals by means of surfactants, increasing separation factor, utilizing gravity separation equipment to separate the impure minerals and the attapulgite clay minerals efficiently, thereby overcoming the shortcomings that the prior art is difficult to achieve industrial production and obtain qualified purification products.
Description
Technical field
Technical scheme of the present invention relates to the wet separation technical field of mineral, the specifically purification of attapulgite clay mineral and working method.
Background technology
Attapulgite is called polygorskite again, be described as " omnipotent clay ", be the sepiolite group clay mineral, be widely used in industries such as petroleum drilling, metallurgy, chemical industry, building materials, printing and dyeing, medicine, grease-decolor, raising pets and livestock-raising, have higher economic value.Though attapulgite clay mineral is one of advantage clay Mineral resources of China, but the overall grade in its mineral deposit is lower, the reserves that can directly satisfy the high grade ore that large-scale industry utilizes are limited, and the kind difference of ore grade, structure type and the impurity of contained attapulgite clay mineral is also very big in the different section ore beds in same mining area, make the unstable properties of product, be difficult to satisfy the demand that modern industry is produced.Thereby the purification of attapulgite clay mineral and working method have become the focus of domestic and international research and development.
It is that 0.5%～3% the silicate or the poly-phosphate aqueous solution are the purification and dispersion agent with concentration that CN1562865 discloses a kind of, the method of the natural attapulgite of purification 200～325 orders, the shortcoming of this method is that purification and dispersion agent usage quantity is big, require insulation simultaneously, particularly propose with technologies such as air stream drying or vacuum freezedryings, consider all to be unsuitable for suitability for industrialized production with becoming we from technology; CN1476931 has disclosed the preparation technology of attapulgite purification and ultrafine powder, and this technology at first will be classified to raw material fineness and be＜10 microns approximately, controls the concentration of ore pulp then, carries out centrifugation, and this is that present industrial equipment is difficult to reach; CN200510095145.5 discloses the method for preparing high-purity attapulgite, its at be mineral with the combination of specific attapulgite-detrital mineral, not only need to spray the polyacrylic acid sodium water solution that consumption is original soil quality 40%-50% in the operation, and want vexed stain more than 24 hours, attapulgite behind the vexed stain compressing tablet is distributed in the polyacrylic acid sodium water solution again, this method not only needs to consume a large amount of sodium polyacrylates, the production operation time is long, the cost height, simultaneously, utilize natural sedimentation to isolate detrital mineral, production efficiency is low, also be difficult to mass-produce high-quality product, therefore also be unsuitable for scale production; CN03158243.5 discloses the Attapulgite wet beneficiation craft, and is limited to the purity raising effect of product because this method is very low to the separation efficiency of impure mineral based on pressurized air stirring and natural subsidence, is difficult to obtain qualified refined product; It is dispersion agent at the sodium polyacrylate of (4000-5000) more than 4000 that US6130179 and US6444601 propose to utilize molecular weight respectively, under agitation condition, attapulgite is fully separated with impure mineral, sieve or industrial centrifugal machine sieves with industry, the water of realizing attapulgite and impure mineral under action of gravity is settlement separate, obtain the technical scheme of high-purity attapulgite, the shortcoming one of these class methods is only to be dispersion agent with the sodium polyacrylate, subject range to the attapulgite clay mineral of different origins and component is narrower, the 2nd, in most of attapulgite clay minerals, the particle size distribution range of impure mineral is very wide, existing coarsely graded, also have fine-gradedly, so the industrial applications of sieving technology has very big difficulty.
Summary of the invention
Technical problem to be solved by this invention is: purification and working method that attapulgite clay mineral is provided, this method utilizes screw classifier to remove the bigger impure mineral of part particle in the raw ore in advance, and strengthen the dispersion effect and the suspension difference of attapulgite and impure mineral by means of tensio-active agent, increase separating factor, utilize the gravitational segregation equipment with impure mineral and attapulgite clay mineral high efficiency separation, thus being difficult to of having overcome that prior art exists shortcoming of realizing suitability for industrialized production and being difficult to obtain qualified refined product.
The present invention solves this technical problem the technical scheme that is adopted: the purification of attapulgite clay mineral and working method, and concrete steps are as follows:
The first step utilizes screw classifier to carry out elementary purification
The ratio that adds 3～15L water according to every kg attapulgite clay mineral raw ore adds grinding in ball grinder with attapulgite clay mineral raw ore and water, the mud overflow that forms is after screw classifier is removed the impure mineral of particle diameter greater than 0.5mm, send into agitation vat by slush pump, add tensio-active agent simultaneously, after the high-speed stirring 30 minutes, obtain the elementary purification attapulgite clay ore pulp of high dispersing, the add-on of tensio-active agent is 0.01%～2.0% of an attapulgite clay mineral ore quality, and described tensio-active agent is for containing carboxyl, amino, the tensio-active agent of hydroxyl;
In second step, utilize vortrap to carry out secondary and purify
The attapulgite clay ore pulp of the elementary purification of the high dispersing that the first step is made is sent into vortrap with slush pump, the ore pulp overflow that forms enters the secondary mixing drum, continue to stir, the effusive impure mineral in vortrap bottom directly enters tailing dam, remove in the attapulgite clay ore pulp particle diameter thus greater than the impure mineral of 0.05mm, obtain the attapulgite clay ore pulp that the secondary of high dispersing is purified;
In the 3rd step, utilize gravitational segregation equipment to carry out three grades of purifications
Give gravitational segregation equipment with the second secondary purification attapulgite clay ore pulp that goes on foot the high dispersing that makes by pipe-line transportation, purify, isolate the microfine impure mineral, obtain the attapulgite clay ore pulp of three grades of purifications of high dispersing through gravitational segregation;
In the 4th step, concentrate
In the attapulgite clay ore pulp of three grades of purifications of the 3rd high dispersing that obtain of step, add flocculation agent, send in the Hhigh-efficient thickener with slush pump behind the mixing and concentrate, most of moisture is wherein got rid of by the supernatant liquor overflow, spissated attapulgite clay ore pulp obtains purifying, the add-on of flocculation agent be in the attapulgite clay ore pulp actual contained attapulgite solid amount 0.01%～2.0%, here actual contained attapulgite solid amount in the said attapulgite clay ore pulp, it is 1 liter of attapulgite clay ore pulp getting three grades of purifications of the 3rd high dispersing that obtain of step, through rotating speed is after whizzer more than 5000 rev/mins carries out solid-liquid separation, topple over and supernatant liquid, with sedimentary foundry loam dry to water content less than after 1.0%, claim the attapulgite solid actual weight that obtains to calculate definite;
The 5th step, oven dry
The 4th spissated attapulgite clay ore pulp of purification that obtain of step is sent into whizzer with slush pump or plate-and-frame filter press dewaters, obtain the thickness sludge, again this thickness sludge is changed in the drying plant and dry, perhaps the spissated attapulgite clay ore pulp of purification that the 4th step was obtained is directly sent into or is sprayed into slush pump in the drying plant and dried 2 hours～4 hours, bake out temperature is 120 ℃～200 ℃, the attapulgite clay mineral agglomerate or the meal that obtain purifying;
In the 6th step, pulverize
With Raymond mill the 5th attapulgite clay mineral agglomerate or the meal that goes on foot the purification that obtains pulverized and air classification, obtain median size less than 35 microns, the largest particle particle diameter is less than 50 microns purification attapulgite clay mineral powder, this mineral powder carries out superfine grinding through airflow milling again, finally obtaining median size is 0.93～2.0 micron, and the particle diameter of largest particle is the attapulgite clay mineral superfine powder of 3.0～5.0 microns purification.
Tensio-active agent described in the purification of above-mentioned attapulgite clay mineral and the working method the first step is preferentially selected one or both in tween series of surfactants, sodium polyacrylate, polyvinyl alcohol, trolamine, the dimethyl dodecyl amine oxide for use, when using wherein two kinds, do not limit the proportioning of consumption therebetween.
Gravitational segregation equipment described in the 3rd step of the purification of above-mentioned attapulgite clay mineral and working method is that in jig, shaking table, disk centrifuge or the centrifugal classifier one or both are united use.
Flocculation agent described in the purification of above-mentioned attapulgite clay mineral and the 4th step of working method is the cationic-type polyacrylamide of molecular weight 500,000～5,000,000.
This foundry loam is changed over to drying plant for changing rotary kiln over to or changing tunnel furnace over to described in the 5th step of the purification of above-mentioned attapulgite clay mineral and working method, send into or be sprayed into drying plant for sending into rotary kiln or being sprayed into infrared drying equipment with slush pump.
Ball mill, screw classifier, slush pump, agitation vat, vortrap, jig, shaking table, disk centrifuge, centrifugal classifier, Hhigh-efficient thickener, whizzer, plate-and-frame filter press, rotary kiln, tunnel furnace, infrared drying equipment, Raymond mill and airflow milling related in the purification of above-mentioned attapulgite clay mineral and the working method are general chemical machinery, and its using method also is that chemical technology field is known.
Related amount of substance all can or dwindle by corresponding proportion expansion in the purification of above-mentioned attapulgite clay mineral and the working method, and the type selecting of equipment is decided on treatment capacity.
The invention has the beneficial effects as follows:
The dispersion efficiency that exists in the method for purification at current existing attapulgite clay mineral is low, natural subsidence sorting or long shortcoming of screening refining effect difference and activity duration, and the present invention proposes a kind of purification and working method that is suitable for the large-scale industrial production attapulgite clay mineral.This method directly drops into the raw ore of mine extraction and grinds dispersion in the ball mill by wet process, utilize cyclone classification equipment, remove the bigger impure mineral of particle in the overflow ore pulp in advance, utilize the acting in conjunction of compound surfactant and attapulgite, strengthen the interface interaction characteristic of attapulgite clay mineral and water, increase mineral and separate impurities factor, improve beneficiating efficiency.Ore pulp utilization flocculation means and efficient thickening equipment after the purification concentrate, and separate and remove most of clear liquid, reduce the consumption of energy in the drying course, finally realize the continuous industry production that attapulgite clay mineral is purified.More specifically be described below:
(1) realizes suitability for industrialized production easily.The purification of attapulgite clay mineral of the present invention and working method are with various large industrialized equipment (ball mills, screw classifier, vortrap, gravitational segregation equipment, thickening equipment, dehydration equipment, in dry equipment, disintegrating apparatus) organically is connected by transport pipe and slush pump transmission equipment, realized supply from raw material, the transmission of ore pulp between distinct device, dispersion between mineral, the size fractionated separate impurities is removed, separate concentrating of purification ore pulp, dehydration, oven dry, to the superfine grinding of refined product and the continuous production of the packing of product, be to be suitable for very much the processing method that the mine produces.This method has that treatment capacity is big, production efficiency is high, easy to maintenance, production cost is low, can satisfy single production line day and handle 5～200 tons of production-scale demands of attapulgite clay mineral raw ore.With ore dressing purification techniques technology provided by the invention, not only can satisfy the industrialization ore dressing purification needs of attapulgite clay mineral, can also satisfy the purification processing needs that other silicate clay mineral if you would take off stone, chlorite, illite, kaolin, mica, zeolite and diatomite mineral, the refined product that obtains thus can satisfy drilling mud, fine chemistry industry, medicine, cosmetic and healthcare products, food-drink processing and high molecule nano composite material and prepare these industrial circles of having relatively high expectations.
(2) make qualified refined product easily.The constant product quality that the purification of attapulgite clay mineral of the present invention and working method make, the stable content of attapulgite is between 88%～95% in the product.Product can satisfy the specific demand to the performance function filler of fine chemistry industry, medicine, cosmetic and healthcare products, food-drink processing and high molecule nano composite material preparation field.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
The purification of Fig. 1 attapulgite clay mineral of the present invention and working method process flow sheet.
The X-diffraction analysis contrast of attapulgite clay mineral before and after purifying among Fig. 2 embodiment 1.
The stereoscan photograph of purification attapulgite clay mineral among Fig. 3 embodiment 1.
The transmission electron microscope photo of purification attapulgite clay mineral among Fig. 4 embodiment 1.
Embodiment
Fig. 1 shows the purification of attapulgite clay mineral and the technical process of working method: after the attapulgite clay mineral raw ore is added water and carries out ball milling and screw classifying, stir and add tensio-active agent simultaneously, carry out cyclone classification again, the coarse fraction sand setting that forms is discharged, the fine fraction ore pulp overflow that forms, carry out gravitational segregation after continuing to stir, isolating the microfine impure mineral discharges, the attapulgite clay mineral ore pulp adding flocculation agent of the purification that obtains concentrates, dry, pulverizing, make the attapulgite clay mineral superfine powder of purification, i.e. the smart powder of attapulgite.
Embodiment 1
The first step utilizes screw classifier to carry out elementary purification
The ratio that adds 5L water according to every kg attapulgite clay mineral raw ore adds grinding in ball grinder with attapulgite clay mineral raw ore and water, the mud overflow that forms is after screw classifier is removed the impure mineral of particle diameter greater than 0.5mm, send into agitation vat by slush pump, add surface active agent polyvinyl alcohol and trolamine simultaneously, after the high-speed stirring 30 minutes, obtain the attapulgite clay ore pulp of the elementary purification of high dispersing, the add-on of polyvinyl alcohol is 0.2% of an attapulgite clay mineral ore quality, and the add-on of trolamine is 0.3% of an attapulgite clay mineral ore quality;
In second step, utilize vortrap to carry out secondary and purify
The attapulgite clay ore pulp of the elementary purification of the high dispersing that the first step is made is sent into vortrap with slush pump, the ore pulp overflow that forms enters the secondary mixing drum, continue to stir, the effusive impure mineral in vortrap bottom directly enters tailing dam, remove in the attapulgite clay mineral ore pulp particle diameter thus greater than the impure mineral of 0.05mm, obtain the attapulgite clay ore pulp that the secondary of high dispersing is purified;
In the 3rd step, utilize gravitational segregation equipment to carry out three grades of purifications
Give jig with the attapulgite clay ore pulp that second secondary that goes on foot the high dispersing that makes is purified by pipe-line transportation, overflow is sent into disk centrifuge and is carried out the sorting purification, isolate the microfine impure mineral, obtain the attapulgite clay mineral ore pulp of three grades of purifications of high dispersing;
In the 4th step, concentrate
In the attapulgite clay ore pulp of three grades of purifications of the 3rd high dispersing that obtain of step, add molecular weight and be 3,000,000 cationic polyacrylamide flocculant agent, send in the Hhigh-efficient thickener with slush pump behind the mixing and concentrate, most of moisture is wherein got rid of by the supernatant liquor overflow, spissated attapulgite clay mineral ore pulp obtains purifying, the add-on of above-mentioned flocculation agent be in the attapulgite clay mineral ore pulp actual contained attapulgite solid amount 1.0%, here actual contained attapulgite solid amount in the said attapulgite clay mineral ore pulp, it is 1 liter of attapulgite clay ore pulp getting three grades of purifications of the 3rd high dispersing that obtain of step, through rotating speed is after whizzer more than 5000 rev/mins carries out solid-liquid separation, topple over and supernatant liquid, with sedimentary foundry loam dry to water content less than after 1.0%, it is definite to claim the attapulgite solid actual weight that obtains to calculate, and the method for calculation of the add-on of flocculation agent are identical in following examples;
The 5th step, oven dry
The spissated attapulgite clay mineral ore pulp of purification that the 4th step was obtained utilizes the plate-and-frame filter press dehydration, obtains the thickness sludge, changes this thickness sludge over to rotary kiln, at 150 ℃, and oven dry in 3 hours, the attapulgite clay mineral agglomerate that obtains purifying;
In the 6th step, pulverize
With Raymond mill the 5th attapulgite clay mineral agglomerate that goes on foot the purification that obtains is pulverized and pneumatic separating, obtain median size less than 35 microns, the largest particle particle diameter is less than 50 microns purification attapulgite clay mineral powder, this mineral powder carries out superfine grinding through airflow milling again, finally obtain median size less than 0.93 micron, the largest particle particle diameter is less than the attapulgite clay mineral superfine powder product of 3.0 microns purification.
The results of grain size analysis of the product that the LS800 laser particle analyzer mensuration of producing with Zhuhai OMEC Technology Co., Ltd. obtains sees Table 1.Through measuring with the X-ray diffraction quantitative analysis, the attapulgite clay mineral content is stabilized between 90%～93% in the product, and Fig. 2 is seen in the X-diffraction analysis contrast before and after purifying.The kind of impure mineral, content and structure of are also stable in the product.The microtexture of product is seen Fig. 3 and Fig. 4.
The results of grain size analysis of the purification attapulgite clay mineral product that table 1 embodiment 1 makes
As can be seen from Table 1, particle diameter accounts for 15.38% less than the granule number of 0.2 μ m, accounts for 59.25% less than the granule number of 1.0 μ m, and all particle grain size are all less than 3.0 μ m, and the median size of product is 0.93 μ m.
From Fig. 2 purify before and after attapulgite clay mineral the X-diffraction curve as can be seen, contain a large amount of impure minerals as quartz, feldspar, rhombspar, sericite and chlorite in (being original soil) mineral before purifying, its content is respectively: attapulgite 36%, sericite and chlorite 7%, quartz 28%, rhombspar 15%, feldspar 11%, other mineral 3%.And after purifying, the content of attapulgite reaches 93%, and sericite and chlorite is 3%, quartzy 2%, rhombspar is less than 2%, and other impurity does not detect.
Fig. 3 is stained with the scanning electron microscope analysis photo of mineral for attapulgite after purifying.As seen the microscopic appearance of attapulgite is amplifying under 10000 times the condition, and purification attapulgite particle is that the reunion form by the rod-shpaed particle of particle diameter below 0.5 micron occurs, and the particle diameter of coacervate is less than 2 microns.
Fig. 4 is the tem study photo of 500,000 times of the amplifications of attapulgite after purifying.As seen the needle bar shape particle that single attapulgite particle is diameter 50nm, the particulate surface also has some irregular groove or projections.
Following examples are with same analysis and means of testing.
Embodiment 2
The first step utilizes screw classifier to carry out elementary purification
The ratio that adds 15L water according to every kg attapulgite clay mineral raw ore adds grinding in ball grinder with attapulgite clay mineral raw ore and water, the mud overflow that forms is after screw classifier is removed the impure mineral of particle diameter greater than 0.5mm, send into agitation vat by slush pump, add tensio-active agent tween 20 and sodium polyacrylate simultaneously, after the high-speed stirring 30 minutes, obtain the attapulgite clay ore pulp of the elementary purification of high dispersing, the add-on of tween 20 is 0.01% of an attapulgite clay mineral ore quality, and polyacrylic add-on is 0.01% of an attapulgite clay mineral ore quality;
In second step, utilize vortrap to carry out secondary and purify
With embodiment 1;
In the 3rd step, utilize gravitational segregation equipment to carry out three grades of purifications
Give centrifugal classifier with the attapulgite clay ore pulp that second secondary that goes on foot the high dispersing that makes is purified by pipe-line transportation, isolate the microfine impure mineral, obtain the attapulgite clay mineral ore pulp of three grades of purifications of high dispersing;
In the 4th step, concentrate
In the attapulgite clay ore pulp of three grades of purifications of the 3rd high dispersing that obtain of step, add molecular weight and be 5,000,000 cationic polyacrylamide flocculant agent, send in the Hhigh-efficient thickener with slush pump behind the mixing and concentrate, most of moisture is wherein got rid of by the supernatant liquor overflow, the spissated attapulgite clay mineral ore pulp that obtains purifying, the add-on of above-mentioned flocculation agent be in the attapulgite clay mineral ore pulp actual contained attapulgite solid amount 2.0%;
The 5th step, oven dry
The concentrated attapulgite ore pulp of purification that the 4th step was obtained utilizes slush pump to send in the rotary kiln, at 200 ℃, and oven dry in 2 hours, the attapulgite clay meal obtains purifying;
In the 6th step, pulverize
With Raymond mill the 5th attapulgite clay mineral meal that goes on foot the purification that obtains is pulverized and pneumatic separating, obtain median size less than 35 microns, the largest particle particle diameter is less than 50 microns purification attapulgite clay mineral powder, this mineral powder carries out superfine grinding through airflow milling again, finally obtain median size less than 1.2 microns, the largest particle particle diameter is less than the attapulgite clay mineral superfine powder product of 4.0 microns purification, the stable content of attapulgite clay mineral between 93%～95%, the content of impure mineral, kind and Stability Analysis of Structures.
Embodiment 3
Removing used tensio-active agent is Tween-40, its add-on be the attapulgite clay mineral ore quality 0.01% outside, other is all with embodiment 2.
Embodiment 4
Utilize slush pump to be sprayed into the infrared drying equipment except that the purification that the 4th step was obtained concentrates the attapulgite ore pulp, other is all with embodiment 2.
Embodiment 5
The first step utilizes screw classifier to carry out elementary purification
The ratio that adds 3L water according to every kg attapulgite clay mineral raw ore adds grinding in ball grinder with attapulgite clay mineral raw ore and water, the mud overflow that forms is after screw classifier is removed the impure mineral of particle diameter greater than 0.5mm, send into agitation vat by slush pump, add tensio-active agent tween-80 and dimethyl dodecyl amine oxide simultaneously, after the high-speed stirring 30 minutes, obtain the attapulgite clay ore pulp of the elementary purification of high dispersing, the add-on of tween-80 is 1.0% of an attapulgite clay mineral ore quality, and the add-on of dimethyl dodecyl amine oxide is 1.0% of an attapulgite clay mineral ore quality;
In second step, utilize vortrap to carry out secondary and purify
With embodiment 1;
In the 3rd step, utilize gravitational segregation equipment to carry out three grades of purifications
The second attapulgite clay ore pulp that goes on foot the high dispersing secondary purification that makes by the defeated separation by shaking table of supplying with of pipeline, is abandoned heavy sand; Mud in suspension is poured whizzer into and is carried out gravitational segregation, isolates the microfine impure mineral, obtains the attapulgite clay mineral ore pulp of three grades of purifications of high dispersing;
In the 4th step, concentrate
In the attapulgite clay ore pulp of three grades of purifications of the 3rd high dispersing that obtain of step, add molecular weight and be 500,000 cationic polyacrylamide flocculant agent, send in the Hhigh-efficient thickener with slush pump behind the mixing and concentrate, most of moisture is wherein got rid of by the supernatant liquor overflow, the spissated attapulgite clay mineral ore pulp that obtains purifying, the add-on of above-mentioned flocculation agent be in the attapulgite clay mineral ore pulp actual contained attapulgite solid amount 0.01%;
The 5th step, oven dry
The 4th purification that obtain of step is concentrated the attapulgite ore pulp utilize centrifuge dewatering, the thickness sludge that obtains changes in the tunnel furnace at 120 ℃, oven dry in 4 hours, and the attapulgite clay agglomerate obtains purifying;
In the 6th step, pulverize
With Raymond mill the 5th attapulgite clay mineral meal that goes on foot the purification that obtains is pulverized and pneumatic separating, obtain median size less than 35 microns, the largest particle particle diameter is less than 50 microns purification attapulgite clay mineral powder, this mineral powder carries out superfine grinding through airflow milling again, finally obtain median size less than 2.0 microns, the largest particle particle diameter is less than the attapulgite clay mineral superfine powder product of 5.0 microns purification, the stable content of attapulgite clay mineral between 88%～91%, the content of impure mineral, kind and Stability Analysis of Structures.
Claims (4)
1. the purification of attapulgite clay mineral and working method is characterized in that concrete steps are as follows:
The first step utilizes screw classifier to carry out elementary purification
The ratio that adds 3～15L water according to every kg attapulgite clay mineral raw ore adds grinding in ball grinder with attapulgite clay mineral raw ore and water, the mud overflow that forms is after screw classifier is removed the impure mineral of particle diameter greater than 0.5mm, send into agitation vat by slush pump, add tensio-active agent simultaneously, after the high-speed stirring 30 minutes, obtain the elementary purification attapulgite clay ore pulp of high dispersing, the add-on of tensio-active agent is 0.01%～2.0% of an attapulgite clay mineral ore quality, described tensio-active agent is the tween series of surfactants, sodium polyacrylate, polyvinyl alcohol, trolamine, in the dimethyl dodecyl amine oxide one or both, when using wherein two kinds, do not limit the proportioning of consumption therebetween;
In second step, utilize vortrap to carry out secondary and purify
The attapulgite clay ore pulp of the elementary purification of the high dispersing that the first step is made is sent into vortrap with slush pump, the ore pulp overflow that forms enters the secondary mixing drum, continue to stir, the effusive impure mineral in vortrap bottom directly enters tailing dam, remove in the attapulgite clay ore pulp particle diameter thus greater than the impure mineral of 0.05mm, obtain the attapulgite clay ore pulp that the secondary of high dispersing is purified;
In the 3rd step, utilize gravitational segregation equipment to carry out three grades of purifications
Give gravitational segregation equipment with the second secondary purification attapulgite clay ore pulp that goes on foot the high dispersing that makes by pipe-line transportation, purify, isolate the microfine impure mineral, obtain the attapulgite clay ore pulp of three grades of purifications of high dispersing through gravitational segregation;
In the 4th step, concentrate
In the attapulgite clay ore pulp of three grades of purifications of the 3rd high dispersing that obtain of step, add flocculation agent, send in the Hhigh-efficient thickener with slush pump behind the mixing and concentrate, most of moisture is wherein got rid of by the supernatant liquor overflow, spissated attapulgite clay ore pulp obtains purifying, the add-on of flocculation agent be in the attapulgite clay ore pulp actual contained attapulgite solid amount 0.01%～2.0%, here actual contained attapulgite solid amount in the said attapulgite clay ore pulp, it is 1 liter of attapulgite clay ore pulp getting three grades of purifications of the 3rd high dispersing that obtain of step, through rotating speed is after whizzer more than 5000 rev/mins carries out solid-liquid separation, topple over and supernatant liquid, with sedimentary foundry loam dry to water content less than after 1.0%, claim the attapulgite solid actual weight that obtains to calculate definite;
The 5th step, oven dry
The 4th spissated attapulgite clay ore pulp of purification that obtain of step is sent into whizzer with slush pump or plate-and-frame filter press dewaters, obtain the thickness sludge, again this thickness sludge is changed in the drying plant and dry, perhaps the spissated attapulgite clay ore pulp of purification that the 4th step was obtained is directly sent into or is sprayed into slush pump in the drying plant and dried 2 hours～4 hours, bake out temperature is 120 ℃～200 ℃, the attapulgite clay mineral agglomerate or the meal that obtain purifying;
In the 6th step, pulverize
With Raymond mill the 5th attapulgite clay mineral agglomerate or the meal that goes on foot the purification that obtains pulverized and air classification, obtain median size less than 35 microns, the largest particle particle diameter is less than 50 microns purification attapulgite clay mineral powder, this mineral powder carries out superfine grinding through airflow milling again, finally obtaining median size is 0.93～2.0 micron, and the particle diameter of largest particle is the attapulgite clay mineral superfine powder of 3.0～5.0 microns purification.
2. according to the purification and the working method of the attapulgite clay mineral described in the claim 1, it is characterized in that: the gravitational segregation equipment described in aforesaid method the 3rd step is that in jig, shaking table, disk centrifuge or the centrifugal classifier one or both are united use.
3. according to the purification and the working method of the attapulgite clay mineral described in the claim 1, it is characterized in that: the flocculation agent described in the 4th step of aforesaid method is the cationic-type polyacrylamide of molecular weight 500,000～5,000,000.
4. according to the purification and the working method of the attapulgite clay mineral described in the claim 1, it is characterized in that: this foundry loam is changed over to drying plant for changing rotary kiln over to or changing tunnel furnace over to described in aforesaid method the 5th step, send into or be sprayed into drying plant for sending into rotary kiln or being sprayed into infrared drying equipment with slush pump.
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| CN101973734B (en) * | 2010-07-30 | 2012-05-23 | 许庆华 | Production method of orange attapulgite clay |
| CN102153095B (en) * | 2010-12-10 | 2012-09-26 | 合肥工业大学 | Method for removing impurities from attapulgite clay ores |
| CN103374241A (en) * | 2012-04-17 | 2013-10-30 | 鲍联 | Integrated powder modification production process |
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| CN102874826B (en) * | 2012-10-18 | 2014-05-28 | 南京信息工程大学 | Purification technical method for attapulgite clay |
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| CN108862297B (en) * | 2018-06-30 | 2021-06-29 | 安徽省化工研究院 | Low-activity attapulgite clay, preparation and test methods and application thereof |
| CN110681372A (en) * | 2018-07-05 | 2020-01-14 | 金昌红泉膨润土有限责任公司 | Method for preparing decoloring agent by using low-grade attapulgite clay raw ore |
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