阅读说明：本技术 一种生产涂料石英砂的级配方法 (Grading method for producing coating quartz sand ) 是由 曾伟 侯龙 于 2019-11-06 设计创作，主要内容包括：本发明公开了一种生产涂料石英砂的级配方法,属于石英砂制造技术领域,解决了现有技术中的涂料用石英砂分布不均匀的问题,包括以下步骤：(1)备料：将位于料仓中的具有不同粒度规格的石英尾砂运送出来作为备用；(2)称重：将不同规格的各种石英尾砂分别放入自动称重器中称重,按重量比例将各粒级的尾砂配成各粒级的石英砂；(3)搅拌：将(2)中经自动称重器配好的石英砂放入搅拌机中进行搅拌；(4)石英砂输送：将(3)中搅拌均匀的石英砂用螺旋输送机输送至包装工序；(5)石英砂包装：将(4)中输送来的石英砂放入装包机中,按重量的进行装袋包装。本发明解决了涂料石英砂各粒级均匀分布难的问题,成本低、质量稳定。(The invention discloses a grading method for producing coating quartz sand, which belongs to the technical field of quartz sand manufacturing, solves the problem of uneven distribution of quartz sand for coating in the prior art, and comprises the following steps: (1) preparing materials: conveying out the quartz tailings with different grain size specifications in a storage bin for later use; (2) weighing: weighing various quartz tailings with different specifications in an automatic weighing device respectively, and preparing the tailings of each grade into the quartz sand of each grade according to the weight proportion; (3) stirring: putting the quartz sand prepared by the automatic weigher in the step (2) into a stirrer for stirring; (4) conveying the quartz sand: conveying the quartz sand uniformly stirred in the step (3) to a packaging process by using a screw conveyor; (5) packaging quartz sand: and (4) putting the quartz sand conveyed in the step (4) into a bagging machine, and bagging and packaging according to weight. The invention solves the problem that the coating quartz sand is difficult to uniformly distribute in each particle size, and has low cost and stable quality.)

1. A grading method for producing coating quartz sand is characterized by comprising the following steps:

(1) preparing materials: conveying out the quartz tailings with different grain size specifications in a storage bin for later use;

(2) weighing: weighing various quartz tailings with different specifications in an automatic weighing device respectively, and preparing the tailings of each grade into the quartz sand of each grade according to the weight proportion;

(3) stirring: putting the quartz sand prepared by the automatic weigher in the step (2) into a stirrer for stirring, so that the positions of sand grains of each grain grade in the quartz sand are uniformly distributed;

(4) conveying the quartz sand: conveying the quartz sand uniformly stirred in the step (3) to a packaging process by using a screw conveyor;

(5) packaging quartz sand: and (4) putting the quartz sand conveyed in the step (4) into a bagging machine, and bagging and packaging according to weight.

2. The process for preparing the quartz sand for shale gas fracturing as claimed in claim 1, wherein the quartz tailings in the step (1) are put into a water washing system for washing for 20-30 min.

3. The grading method for producing coating quartz sand according to claim 1, wherein the quartz tailings are subjected to magnetic separation before weighing in the step (2), the quartz tailings are put into a magnetic separator, magnetic metal impurities are removed from the quartz tailings, and the field intensity of the magnetic separator is 0.1-0.5 Tesla.

4. The grading method for producing coated quartz sand according to claim 1, wherein the quartz sand is stirred in step (3) with a horizontal screw stirrer for 25-35 min.

Technical Field

The invention belongs to the technical field of quartz sand manufacturing, and particularly relates to a grading method for producing coating quartz sand.

Background

Quartz tailings are precious mineral resources, and the annual emission amount of China is thousands of tons, so that resource utilization becomes a necessary trend. The more 1000 million tons of the discharged quartz tailings and ore tailings are discharged every year in China, and the discharged quartz tailings and ore tailings are large in quantity, so that serious adverse effects such as environmental pollution, land occupation, channel and reservoir silting are directly caused. Many enterprises are still relatively laggard in process and dust prevention, and especially in the dry processing process of quartz sand, a large amount of dust is generated, the production environment is quite severe, and the health of workers and nearby residents is seriously harmed. In order to protect the environment and fully utilize mineral resources, the comprehensive utilization of the quartz sand tailings is urgent.

The paint is a material which can be coated on the surface of an object by different construction processes to form a continuous solid film with firm adhesion and certain strength. The aging resistance and the antibacterial property of the coating layer of the coating reflect the use value of the coating under the action of a plurality of factors of natural landscapes, and the coating layer is a comprehensive expression of various properties of the coating. Researches find that the quartz sand tailings and other chemical components such as fumed silica and nano acrylic emulsion are well integrated, the physicochemical property of the coating is improved, the adhesive force and the surface mechanical strength of a coating film are enhanced, the aging resistance and the antibacterial property of the coating are effectively improved, and the comprehensive properties of the coating, such as water resistance, alkali resistance, acid resistance, scrubbing resistance and the like, are improved. A large amount of titanium dioxide with higher cost is used in the traditional latex paint, but the aging property and the antibacterial property of a coating film are still not ideal, and harmful gas cannot be completely released. The addition of quartz tailings and other chemical components to replace the expensive titanium dioxide is an ideal method.

Therefore, the purity and the particle size of the quartz tailings have great influence on the performance of the coating, and the preparation of the quartz tailings meeting the requirements is not simple, wherein the quartz tailings comprise waste residues in ore mining, tailings and tailings in the processing process, and the tailings account for the vast majority. The chemical components of the quartz tailings are mainly SiO2, compared with quartz refined sand, the content of SiO2 in the tailings is obviously reduced, so that the quality of the tailings is not high, and the quartz sand manufactured by the existing processing technology has uneven grain size distribution, so that the use effect is poor, the stability is insufficient, and the cost is high when the high-quality quartz sand is required to be obtained.

Disclosure of Invention

The invention aims to:

in order to solve the problem of uneven distribution of quartz sand for coating in the prior art, a grading method for producing coating quartz sand is provided.

The technical scheme adopted by the invention is as follows:

a grading method for producing coating quartz sand is characterized by comprising the following steps:

(1) preparing materials: conveying out the quartz tailings with different grain size specifications in a storage bin for later use;

(2) weighing: weighing various quartz tailings with different specifications in an automatic weighing device respectively, and preparing the tailings of each grade into the quartz sand of each grade according to the weight proportion;

(3) stirring: putting the quartz sand prepared by the automatic weigher in the step (2) into a stirrer for stirring, so that the positions of sand grains of each grain grade in the quartz sand are uniformly distributed;

(4) conveying the quartz sand: conveying the quartz sand uniformly stirred in the step (3) to a packaging process by using a screw conveyor;

(5) packaging quartz sand: and (4) putting the quartz sand conveyed in the step (4) into a bagging machine, and bagging and packaging according to weight.

Further, the quartz tailings in the step (1) are put into a water washing system for washing, and the washing time is 20-30 min.

Further, magnetic separation is carried out on the quartz tailings before weighing in the step (2), the quartz tailings are placed into a magnetic separator, magnetic metal impurities in the quartz tailings are removed, and the field intensity of the magnetic separator is 0.1-0.5 Tesla.

Further, in the step (3), a horizontal spiral stirrer is adopted for stirring the quartz sand, and stirring is carried out for 25-35 min.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the invention utilizes the characteristic of low cost of the quartz tailings, carries out targeted grading on the quartz sand by weighing, balancing and stirring uniformly, solves the problem that the particle size of the quartz sand of the coating is difficult to distribute uniformly, improves the quality of the quartz sand for producing the coating, ensures that the quality of the produced coating product is more stable, and finally obtains the quartz sand by grading various quartz tailings, thereby having lower cost.

2. The invention performs magnetic separation on the quartz tailings, so that the impurities in the quartz tailings are less, and the obtained quartz tailings are purer.

3. The horizontal spiral stirrer is adopted for stirring, so that the problem that a common vertical stirrer has more stirring dead angles can be prevented, quartz tailings are stirred more uniformly and thoroughly, and the stirring effect is better.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.