阅读说明：本技术 可进行分级筛选的钙基和钠基混合膨润土制备工艺 (Preparation process of calcium-based and sodium-based mixed bentonite capable of being classified and screened ) 是由 张文瀚 范秀丽 于 2021-02-24 设计创作，主要内容包括：本发明公开了可进行分级筛选的钙基和钠基混合膨润土制备工艺,包括以下步骤：步骤一,原矿选择；步骤二,冲洗除杂；步骤三,矿料粉碎；步骤四,分堆晾晒；步骤五,调和钠化；步骤六,烘干处理；步骤七,研磨成粉；步骤八,混合搅拌；步骤九,超声处理；步骤十,提纯处理；步骤十一,综合检验；步骤十二,包装入库；该发明通过对矿石原料进行冲洗除杂以及对混合膨润土半成品进行过滤筛选,有利于提升产品的纯度,通过对搅拌机搅拌过程中的原料进行超声处理,有利于提升钙基膨润土半成品和钠基膨润土半成品的混合均匀程度,该混合膨润土细度在200-325目之间,可根据客户要求进行分级筛选出不同细度的混合膨润土。(The invention discloses a preparation process of calcium-based and sodium-based mixed bentonite capable of being classified and screened, which comprises the following steps: selecting raw ores; step two, washing and removing impurities; step three, crushing the mineral aggregate; step four, stacking and airing; step five, blending sodium; step six, drying treatment; step seven, grinding into powder; step eight, mixing and stirring; step nine, ultrasonic treatment; step ten, purification treatment; step eleven, carrying out comprehensive inspection; step twelve, packaging and warehousing; according to the invention, the ore raw materials are washed to remove impurities, and the mixed bentonite semi-finished product is filtered and screened, so that the purity of the product is favorably improved, the raw materials in the stirring process of the stirrer are subjected to ultrasonic treatment, the uniform mixing degree of the calcium bentonite semi-finished product and the sodium bentonite semi-finished product is favorably improved, the fineness of the mixed bentonite is 200-325 meshes, and the mixed bentonite with different fineness can be screened in a grading manner according to the requirements of customers.)

1. The preparation process of the calcium-based and sodium-based mixed bentonite capable of being classified and screened comprises the following steps: selecting raw ores; step two, washing and removing impurities; step three, crushing the mineral aggregate; step four, stacking and airing; step five, blending sodium; step six, drying treatment; step seven, grinding into powder; step eight, mixing and stirring; step nine, ultrasonic treatment; step ten, purification treatment; step eleven, carrying out comprehensive inspection; step twelve, packaging and warehousing; the method is characterized in that:

in the first step, firstly, selecting high-quality bentonite raw ore which is qualified by raw ore inspection and has 80-90% of montmorillonite content as an ore raw material;

in the second step, the high-quality bentonite ore in the first step is conveyed through a conveyor belt, and is washed by clean water in the conveying process, so that soil and dust are washed clean, and impurities such as weeds, garbage, stones and the like in the bentonite ore are removed;

in the third step, the ore raw material after being washed and impurity-removed in the second step is conveyed to a crusher to be crushed, and fine ore is prepared for standby after crushing is finished;

in the fourth step, the fine ores crushed in the third step are respectively spread to two positions of an airing field by a forklift for natural airing, and simultaneously, sodium carbonate and sodium chloride are uniformly spread on one position of the aired fine ores, stacked and aged for later use;

in the fifth step, the fine ore paved with the sodium carbonate and the sodium chloride in the fourth step is put into a double-screw mixer for extrusion sodium modification, and the fine ore is reserved after the sodium modification;

in the sixth step, the fine ores which are not subjected to sodium treatment in the fourth step and the fine ores subjected to sodium treatment in the fifth step are respectively put into a drum dryer to be dried, and the fine ores are reserved after the drying is finished;

in the seventh step, the fine ores dried in the sixth step are respectively conveyed to a storage hopper through a lifter, then uniformly conveyed to a Raymond mill through an electromagnetic vibration feeder for grinding, and then subjected to blast screening and discharging, so that a calcium-based bentonite semi-finished product and a sodium-based bentonite semi-finished product are respectively obtained;

in the eighth step, the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product prepared in the seventh step are put into a stirrer to be uniformly stirred;

in the ninth step, while mixing and stirring are carried out in the eighth step, an ultrasonic generator is utilized to carry out ultrasonic treatment on the calcium bentonite semi-finished product and the sodium bentonite semi-finished product in the stirring process, and the mixed bentonite semi-finished product is prepared for standby after the ultrasonic treatment is finished;

in the tenth step, the semi-finished product of the mixed bentonite prepared in the ninth step is put into a filtering and screening machine, impurities such as sand, calcite and quartz stone in the semi-finished product of the mixed bentonite are removed, and the purity of the semi-finished product of the mixed bentonite is further improved;

in the eleventh step, the montmorillonite content, the granularity, the heavy metal content, the existence of harmful substances, the water content and the like of the semi-finished product of the mixed bentonite purified in the tenth step are detected, and the preparation of the finished product of the calcium-based and sodium-based mixed bentonite is finished after the detection is qualified;

in the above-mentioned step twelve, the finished product of the calcium-based and sodium-based mixed bentonite prepared in the step twelve is weighed and packed, and is made into individual packages with uniform weight, and then is put into a warehouse for storage.

2. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the third step, the crusher is a small hammer type ore crusher, and the diameter of the crushed fine ore is 0.25-0.55 cm.

3. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the fourth step, the water content of the fine ores after natural airing is 20-30%, and the stacking and aging time is 5-7 d.

4. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the sixth step, the drying temperature of the drum dryer is 350-.

5. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the seventh step, the fineness of the particles after the materials are discharged by the air blast sieving is between 200 and 325 meshes.

6. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the step eight, the rotation speed of the stirrer is 500-800r/min, and the stirring time is 3-5 h.

7. The process for preparing calcium-based and sodium-based mixed bentonite capable of being classified and screened according to claim 1, wherein the process comprises the following steps: in the ninth step, the power intensity of the ultrasonic generator is 1-1.5w/cm²The ultrasonic treatment time is 1-2 h.

Technical Field

The invention relates to the technical field of bentonite production, in particular to a preparation process of calcium-based and sodium-based mixed bentonite capable of being subjected to classified screening.

Background

The bentonite is a non-metal mineral product with montmorillonite as a main mineral component, and the montmorillonite structure is 2: the crystal structure of the type 1 has better ion exchange performance because certain cations, such as Cu, Mg, Na, K and the like, exist in a layered structure formed by montmorillonite unit cells, and the cations have unstable effects with the montmorillonite unit cells and are easy to exchange with other cations. Foreign countries have been applied to more than 100 departments in 24 fields of industrial and agricultural production, and more than 300 products exist, so that the soil is called as 'universal soil'.

The application range of the bentonite is very wide, the bentonite is applied in various rows, so that the method for producing the bentonite is different, however, the sodium bentonite on the market has excellent performance, but the price is high, the calcium bentonite has low price, but the performance price is poor, so that the price and the performance are balanced by the preparation of the calcium-based and sodium-based mixed bentonite, however, the mixed bentonite on the market has specific fineness, can not be screened according to the needs in a grading way, the application range is reduced, in the production and manufacturing process, the mixed bentonite contains more impurities, the purity of the product is greatly reduced, meanwhile, the calcium-based and sodium-based mixed bentonite on the market at present is not mixed uniformly enough, the performance is unstable, and the quality of the product is reduced.

Disclosure of Invention

The invention aims to provide a preparation process of calcium-based and sodium-based mixed bentonite capable of carrying out classification screening so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the preparation process of the calcium-based and sodium-based mixed bentonite capable of being classified and screened comprises the following steps: selecting raw ores; step two, washing and removing impurities; step three, crushing the mineral aggregate; step four, stacking and airing; step five, blending sodium; step six, drying treatment; step seven, grinding into powder; step eight, mixing and stirring; step nine, ultrasonic treatment; step ten, purification treatment; step eleven, carrying out comprehensive inspection; step twelve, packaging and warehousing;

in the first step, firstly, selecting high-quality bentonite raw ore which is qualified by raw ore inspection and has 80-90% of montmorillonite content as an ore raw material;

in the second step, the high-quality bentonite ore in the first step is conveyed through a conveyor belt, and is washed by clean water in the conveying process, so that soil and dust are washed clean, and impurities such as weeds, garbage, stones and the like in the bentonite ore are removed;

in the third step, the ore raw material after being washed and impurity-removed in the second step is conveyed to a crusher to be crushed, and fine ore is prepared for standby after crushing is finished;

in the fourth step, the fine ores crushed in the third step are respectively spread to two positions of an airing field by a forklift for natural airing, and simultaneously, sodium carbonate and sodium chloride are uniformly spread on one position of the aired fine ores, stacked and aged for later use;

in the fifth step, the fine ore paved with the sodium carbonate and the sodium chloride in the fourth step is put into a double-screw mixer for extrusion sodium modification, and the fine ore is reserved after the sodium modification;

in the sixth step, the fine ores which are not subjected to sodium treatment in the fourth step and the fine ores subjected to sodium treatment in the fifth step are respectively put into a drum dryer to be dried, and the fine ores are reserved after the drying is finished;

in the seventh step, the fine ores dried in the sixth step are respectively conveyed to a storage hopper through a lifter, then uniformly conveyed to a Raymond mill through an electromagnetic vibration feeder for grinding, and then subjected to blast screening and discharging, so that a calcium-based bentonite semi-finished product and a sodium-based bentonite semi-finished product are respectively obtained;

in the eighth step, the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product prepared in the seventh step are put into a stirrer to be uniformly stirred;

in the ninth step, while mixing and stirring are carried out in the eighth step, an ultrasonic generator is utilized to carry out ultrasonic treatment on the calcium bentonite semi-finished product and the sodium bentonite semi-finished product in the stirring process, and the mixed bentonite semi-finished product is prepared for standby after the ultrasonic treatment is finished;

in the tenth step, the semi-finished product of the mixed bentonite prepared in the ninth step is put into a filtering and screening machine, impurities such as sand, calcite and quartz stone in the semi-finished product of the mixed bentonite are removed, and the purity of the semi-finished product of the mixed bentonite is further improved;

in the eleventh step, the montmorillonite content, the granularity, the heavy metal content, the existence of harmful substances, the water content and the like of the semi-finished product of the mixed bentonite purified in the tenth step are detected, and the preparation of the finished product of the calcium-based and sodium-based mixed bentonite is finished after the detection is qualified;

in the above-mentioned step twelve, the finished product of the calcium-based and sodium-based mixed bentonite prepared in the step twelve is weighed and packed, and is made into individual packages with uniform weight, and then is put into a warehouse for storage.

According to the technical scheme, in the third step, the crusher is a small hammer type ore crusher, and the diameter of the crushed fine ore is 0.25-0.55 cm.

According to the technical scheme, in the fourth step, the water content of the naturally aired fine ores is 20-30%, and the stacking and aging time is 5-7 d.

According to the technical scheme, in the sixth step, the drying temperature of the drum dryer is 350-500 ℃, and the drying time is 90-100 min.

According to the technical scheme, in the seventh step, the particle fineness after the material is discharged by air blowing and sieving is between 200-325 meshes.

According to the technical scheme, in the eighth step, the rotating speed of the stirrer is 500-.

According to the technical scheme, in the ninth step, the power intensity of the ultrasonic generator is 1-1.5w/cm²The ultrasonic treatment time is 1-2 h.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the ore raw material is washed to remove impurities, and the mixed bentonite semi-finished product is filtered and screened, so that the impurities in the mixed bentonite can be completely removed, and the purity of the product can be improved.

2. According to the invention, the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product are subjected to ultrasonic treatment in the stirring process, so that the mixing uniformity of the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product is favorably improved, and the quality of the product is favorably improved.

3. The calcium bentonite and the sodium bentonite are mixed to prepare the bentonite, the price and the performance of the product are considered, meanwhile, the fineness of the mixed bentonite is 200-325 meshes, the mixed bentonite with different fineness can be screened out in a grading way according to the requirements of customers, and the added value of the product is favorably improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the preparation process of the calcium-based and sodium-based mixed bentonite capable of being classified and screened comprises the following steps: selecting raw ores; step two, washing and removing impurities; step three, crushing the mineral aggregate; step four, stacking and airing; step five, blending sodium; step six, drying treatment; step seven, grinding into powder; step eight, mixing and stirring; step nine, ultrasonic treatment; step ten, purification treatment; step eleven, carrying out comprehensive inspection; step twelve, packaging and warehousing;

in the first step, firstly, selecting high-quality bentonite raw ore which is qualified by raw ore inspection and has 80-90% of montmorillonite content as an ore raw material;

in the second step, the high-quality bentonite ore in the first step is conveyed through a conveyor belt, and is washed by clean water in the conveying process, so that soil and dust are washed clean, and impurities such as weeds, garbage, stones and the like in the bentonite ore are removed;

in the third step, the ore raw material after washing and impurity removal in the second step is conveyed to a crusher for crushing, the crusher is a small hammer type ore crusher, the diameter of the crushed fine ore is 0.25-0.55cm, and the fine ore is prepared for standby after crushing;

in the fourth step, the fine ores crushed in the third step are respectively spread to two positions of an airing field by a forklift for natural airing, meanwhile, sodium carbonate and sodium chloride are uniformly spread on one position of the aired fine ores, the fine ores are stacked and aged for standby, the water content of the naturally aired fine ores is 20-30%, and the stacking and aging time is 5-7 d;

in the fifth step, the fine ore paved with the sodium carbonate and the sodium chloride in the fourth step is put into a double-screw mixer for extrusion sodium modification, and the fine ore is reserved after the sodium modification;

in the sixth step, the fine ores which are not subjected to sodium treatment in the fourth step and the fine ores which are subjected to sodium treatment in the fifth step are respectively put into a drum dryer for drying, the drying temperature of the drum dryer is 350-500 ℃, the drying time is 90-100min, and the fine ores are reserved after drying;

in the seventh step, the fine ores dried in the sixth step are respectively conveyed to a storage hopper through a lifter, then are uniformly conveyed to a Raymond mill through an electromagnetic vibration feeder for grinding, and are subjected to blast screening and discharging after grinding, and the particle fineness is between 200 and 325 meshes after the blast screening and discharging, so that a calcium bentonite semi-finished product and a sodium bentonite semi-finished product are respectively obtained;

in the eighth step, the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product prepared in the seventh step are put into a stirrer for uniform stirring, the rotating speed of the stirrer is 500-800r/min, and the stirring time is 3-5 h;

in the ninth step, while mixing and stirring are carried out in the eighth step, the calcium-based bentonite semi-finished product and the sodium-based bentonite semi-finished product in the stirring process are subjected to ultrasonic treatment by using an ultrasonic generator, and the power intensity of the ultrasonic generator is 1-1.5w/cm²The ultrasonic treatment time is 1-2h, and a mixed bentonite semi-finished product is prepared for standby after the ultrasonic treatment is finished;

in the tenth step, the semi-finished product of the mixed bentonite prepared in the ninth step is put into a filtering and screening machine, impurities such as sand, calcite and quartz stone in the semi-finished product of the mixed bentonite are removed, and the purity of the semi-finished product of the mixed bentonite is further improved;

in the eleventh step, the montmorillonite content, the granularity, the heavy metal content, the existence of harmful substances, the water content and the like of the semi-finished product of the mixed bentonite purified in the tenth step are detected, and the preparation of the finished product of the calcium-based and sodium-based mixed bentonite is finished after the detection is qualified;

in the above-mentioned step twelve, the finished product of the calcium-based and sodium-based mixed bentonite prepared in the step twelve is weighed and packed, and is made into individual packages with uniform weight, and then is put into a warehouse for storage.

Based on the above, the method has the advantages that the raw material ore is washed to remove impurities, the content of impurities in the product is preliminarily reduced, meanwhile, the semi-finished product of the mixed bentonite is filtered and screened, the content of the impurities is further reduced, the purity of the product is favorably improved, in the process of mixing and stirring, the semi-finished product of the calcium bentonite and the semi-finished product of the sodium bentonite which are stirred in the stirring machine are subjected to ultrasonic treatment through ultrasonic waves, the uniformity degree of mixing is favorably improved, the quality of the product is favorably improved, the product has the low price of the calcium bentonite and the high performance of the sodium bentonite, the fineness of the mixed bentonite is 200 meshes 325 meshes, the mixed bentonite with different finenesses can be screened in a grading manner according to requirements, and the application range of the product is expanded.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.