WO2020151024A1

WO2020151024A1 - Waterproof microbead and manufacturing method therefor

Info

Publication number: WO2020151024A1
Application number: PCT/CN2019/074209
Authority: WO
Inventors: 任文强
Original assignee: 柳州市柳晶科技股份有限公司
Priority date: 2019-01-25
Filing date: 2019-01-31
Publication date: 2020-07-30
Also published as: CN109534727B; CN109534727A

Abstract

The present invention relates to the field of waterproof materials and particularly relates to a waterproof microbead and a manufacturing method therefor. The waterproof microbead of the present invention comprises the following raw materials by mass fraction: 90-96％ of fine tailings, 2-6% of paraffin, 1-3％ of bentonite, 0.3-0.6％ of calcium oxide, 0.7-0.9% of nanometer aluminium oxide powder. The waterproof microbead is obtained by mixing and stirring, heating and granulating and cooling and screening processes. By the synergistic effect among the various raw materials, the manufactured waterproof microbead of the present invention has a high strength and waterproof and anti-crack functions, can reduce the water permeability of soil, improve the air permeability of soil and effectively improve soil, and is conductive to plant growth.

Description

Waterproof microbeads and preparation method thereof

This disclosure is based on a Chinese patent application with an application number of 201910073129.8 and an application date of January 25, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.

Technical field

The invention relates to the field of waterproof materials, in particular to a waterproof microbead and a preparation method thereof.

Background technique

Natural soil has internal spaces such as pores and cracks, which are easily permeable to form leakage, which is not conducive to the growth of plants. For the leakage of various water bodies, the plastic film bottoming method is more common, but the plastic film bottoming method is more expensive, complicated in construction procedures, and has a long period, poor ventilation effect, and insufficient anti-seepage effect during use, and time-effectiveness Short sex, poor application effect.

Summary of the invention

In view of the above technical problems, the present invention provides a waterproof microbead and a preparation method thereof.

The present invention adopts the following technical solutions:

A waterproof microbead comprises raw materials with the following mass fractions: 90-96% of fine tailings, 2-6% of paraffin wax, 1-3% of bentonite, 0.3-0.6% of calcium oxide, and 0.7-0.9% of nano alumina powder.

Further, the waterproof microbeads include the following mass fractions of raw materials: 93% of fine tailings, 4% of paraffin wax, 2% of bentonite, 0.3% of calcium oxide, and 0.7% of nano alumina powder.

Further, the fine tailings include one or more mixtures of tailings, tailings, dust removal ash, glass fiber, and white carbon black.

The tailings, tailings, dust removal ash, etc. in the fine tailings are all granular or powdery raw materials with finer particle size. By mixing with raw materials such as paraffin wax and bentonite, the raw materials are agglomerated into larger particle size by using the bonding properties of paraffin wax. Particles, reduce the dust phenomenon caused by the fine particle size of the fine tail material during use, and at the same time, when in use, after contact with water, a certain hardness shell will be formed on the surface of the beads to prevent the penetration of moisture, and between the beads It forms a polymerized whole, reduces the fluidity of the microbeads, helps improve the rain erosion resistance of the waterproof microbeads, and further improves the service life of the microbeads.

The waterproof microbeads of the present invention use solid waste such as tailings, tailings and dust removal ash as main raw materials to prepare waterproof microbeads, which can reduce industrial solid waste emissions and have huge environmental protection benefits; the added paraffin wax has excellent fluidity and electricity Performance, mold release and bonding performance, can improve the bonding performance of waterproof beads, help to enhance its waterproof performance; added bentonite has good thickening, thixotropy, suspension stability, high temperature stability, lubrication The added calcium oxide has excellent water absorption properties; the added nano alumina powder has excellent compactness, smoothness, cold and hot fatigue, fracture toughness and creep resistance; through the synergy between the raw materials The prepared waterproof microbeads have high-strength, waterproof and anti-cracking functions, can reduce soil water permeability, improve soil air permeability, and can effectively improve soil and benefit plant growth.

The present invention also provides a preparation method of the waterproof microbeads, which includes the following steps:

(1) Mix the fine tailings, paraffin, bentonite, calcium oxide, and nano-alumina powder and then add them to a stirred tank and stir to obtain a mixture;

(2) Add the mixture to the granulator to granulate, and continuously heat and stir during the granulation process to obtain microbead particles;

(3) The microbead particles are uniformly cooled to room temperature and then sieved to obtain waterproof microbeads.

Further, the stirring rate in step (1) is 300-600 rpm, and the stirring time is 20-30 min.

Further, the heating temperature in the granulation process in step (2) is 50-70°C, and the stirring rate is 100-200 rpm.

Further, the cooled microbead particles are passed through an 80-100 mesh sieve.

The preparation method of the waterproof microbeads of the present invention is prepared by mixing and granulating raw materials. The preparation method is simple, can ensure that the materials are fully mixed, and help to improve the activity of the waterproof microbeads; Agglomeration and granulation can obtain microbeads with larger particle size, which helps to inhibit the generation of dust and reduce the fluidity of microbeads.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Example 1

A waterproof microbead comprises raw materials with the following mass fractions: 96% tailings, 2% paraffin wax, 1% bentonite, 0.3% calcium oxide, and 0.7% nano-alumina powder.

The preparation method of waterproof microbeads in this embodiment includes the following steps:

(1) Mix the tailings, paraffin, bentonite, calcium oxide, and nano-alumina powder and add them to a stirred tank and stir at a stirring rate of 300 rpm and stirring time of 20 minutes to obtain a mixture;

(2) Add the mixture into the granulator to granulate, and continuously heat and stir during the granulation process at a heating temperature of 50°C and a stirring rate of 100 rpm to obtain microbead particles;

(3) Discharging the microbead particles into a cooling barrel and evenly cooling to room temperature, passing through an 80-mesh sieve to obtain waterproof microbeads.

Example 2

A waterproof microbead comprises the following mass fractions of raw materials: 90% dust removal ash, 6% paraffin wax, 3% bentonite, 0.3% calcium oxide, and 0.7% nano-alumina powder.

(1) Mix the dust ash, paraffin wax, bentonite, calcium oxide, and nano-alumina powder and then add them to a stirred tank and stir at a stirring rate of 600 rpm and a stirring time of 30 minutes to obtain a mixture;

(2) Add the mixture to the granulator to granulate, and continuously heat and stir during the granulation process at a heating temperature of 70°C and a stirring rate of 200 rpm to obtain microbead particles;

(3) Discharging the microbead particles into a cooling barrel and evenly cooling to room temperature, then passing through a 100-mesh sieve to obtain waterproof microbeads.

Example 3

A waterproof microbead comprises raw materials with the following mass fractions: 63.7% of tailings, 30% of white carbon, 3% of paraffin, 2% of bentonite, 0.5% of calcium oxide, and 0.8% of nano alumina powder.

(1) Mix the tailings, paraffin, bentonite, calcium oxide, and nano-alumina powder and add them to a stirred tank and stir at a stirring rate of 400 rpm and a stirring time of 22 minutes to obtain a mixture;

(2) Add the mixture into the granulator to granulate, and continuously heat and stir during the granulation process, the heating temperature is 55°C, and the stirring rate is 120 rpm to obtain microbead particles;

Example 4

A waterproof microbead comprises the following mass fractions of raw materials: 60% dust ash, 33% glass fiber, 3% paraffin wax, 3% bentonite, 0.3% calcium oxide, and 0.7% nano alumina powder.

(1) Mix the dust removal ash, glass fiber, paraffin, bentonite, calcium oxide, and nano-alumina powder and add them to a stirred tank and stir at a stirring rate of 500 rpm and a stirring time of 28 minutes to obtain a mixture;

(2) Add the mixture to the granulator to granulate, and continuously heat and stir during the granulation process, the heating temperature is 65°C, and the stirring rate is 180 rpm to obtain microbead particles;

(3) Discharging the microbead particles into a cooling barrel and evenly cooling to room temperature, passing through a 95-mesh sieve to obtain waterproof microbeads.

Example 5

A waterproof microbead comprises raw materials with the following mass fractions: 40% tailings, 52.5% tailings, 4% paraffin wax, 2% bentonite, 0.6% calcium oxide, and 0.9% nano-alumina powder.

(1) Mix the fine tailings, paraffin, bentonite, calcium oxide, and nano-alumina powder and then add them to a stirred tank and stir at a stirring rate of 450 rpm and a stirring time of 25 minutes to obtain a mixture;

(2) Add the mixture to the granulator to granulate, and continuously heat and stir during the granulation process at a heating temperature of 60°C and a stirring rate of 150 rpm to obtain microbead particles;

(3) Discharging the microbead particles into a cooling barrel and evenly cooling to room temperature, passing through a 90-mesh sieve, to obtain waterproof microbeads.

Example 6

A waterproof microbead comprises raw materials with the following mass fractions: 93% tailings, 4% paraffin wax, 2% bentonite, 0.3% calcium oxide, and 0.7% nano-alumina powder.

Comparative example 1

A waterproof microbead comprises raw materials with the following mass fractions: 96% tailings, 1% paraffin wax, 2% bentonite, 0.3% calcium oxide, and 0.7% nano-alumina powder.

The preparation method of the waterproof microbeads in this example is the same as that of Example 1.

Comparative example 2

A waterproof microbead, comprising the following mass fractions of raw materials: 93% tailings, 2% paraffin wax, 0.5% calcium oxide, and 4.5% bentonite.

Comparative example 3

A waterproof microbead comprises the following mass fractions of raw materials: 92% tailings, 5.5% paraffin wax, 0.5% calcium oxide, and 2% nano-alumina powder.

Comparative example 4

A waterproof microbead comprises raw materials with the following mass fractions: 94% tailings, 3% paraffin wax, 2.3% bentonite, and 0.7% nano alumina powder.

The waterproof microbeads prepared in Examples 1-6 and Comparative Examples 1-4 were subjected to a waterproof height test. A 10cm waterproof microbead was laid on the bottom of the pipe, and 2 meters high water was injected. The height was increased by 0.5 meters every 30 minutes. The height of water seepage is the waterproof height; meanwhile, the waterproof microbeads in Examples 1-6 and Comparative Examples 1-4 were tested again after half a year of application; the specific test results are shown in Table 1.

Table 1 Waterproof height test results

组别Group	初始防水高度(米)Initial waterproof height (m)	使用半年后防水高度(米)Waterproof height after six months of use (m)
实施例1Example 1	4.54.5	4.04.0
实施例2Example 2	3.53.5	3.53.5
实施例3Example 3	4.04.0	3.53.5
实施例4Example 4	3.53.5	3.03.0

实施例5Example 5	4.04.0	3.53.5
实施例6Example 6	5.05.0	4.54.5
对比例1Comparative example 1	2.02.0	2.02.0
对比例2Comparative example 2	2.52.5	2.02.0
对比例3Comparative example 3	2.52.5	2.02.0
对比例4Comparative example 4	2.52.5	2.02.0

It can be seen from Table 1 that the waterproof microbeads prepared in the examples of the present invention have a good waterproof effect. The bonding performance between the microbeads is improved by adding paraffin wax, and the bonding between the raw materials such as bentonite, calcium oxide, nano alumina powder, etc. Synergistic effect, a hard shell is formed on the surface of the microbeads in contact with water, which helps to improve the waterproof effect of the microbeads, and at the same time reduces the fluidity of the microbeads, has a good stabilization effect and resistance to rain washing, making the present invention The microbeads in the embodiments still maintain good waterproof performance after being used for a long time, which improves the service life of the microbeads. On the other hand, when the waterproof microbeads prepared in each embodiment of the present invention are applied to a plant planting substrate, the survival rate of the plant is above 90%, which has good applicability.

The present invention has been further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Those of ordinary skill in the art will comment on the above after reading this specification. Various modifications made to the embodiments belong to the protection scope of the present invention.

Claims

A waterproof microbead, which is characterized in that it comprises the following mass fractions of raw materials: 90-96% of fine tailings, 2-6% of paraffin wax, 1-3% of bentonite, 0.3-0.6% of calcium oxide, 0.7-6% of nano alumina powder 0.9%.
The waterproof microbeads according to claim 1, wherein the waterproof microbeads comprise the following mass fractions of raw materials: 93% fine tailings, 4% paraffin wax, 2% bentonite, 0.3% calcium oxide, nano alumina powder 0.7%.
The waterproof microbeads according to claim 1 or 2, wherein the fine tailings comprise one or more mixtures of tailings, tailings, dust removal ash, glass fiber, and silica.
A method for preparing the waterproof microbeads according to any one of claims 1-3, characterized in that it comprises the following steps:

(1) Mix the fine tailings, paraffin, bentonite, calcium oxide, and nano-alumina powder and then add them to a stirred tank and stir to obtain a mixture;

(2) Add the mixture to the granulator to granulate, and continuously heat and stir during the granulation process to obtain microbead particles;

(3) The microbead particles are uniformly cooled to room temperature and then sieved to obtain waterproof microbeads.
The method for preparing waterproof microbeads according to claim 4, wherein the stirring rate in step (1) is 300-600 rpm, and the stirring time is 20-30 min.
The method for preparing waterproof microbeads according to claim 4, wherein the heating temperature in the granulation process of step (2) is 50-70°C, and the stirring rate is 100-200 rpm.
The method for preparing waterproof microbeads according to claim 4, wherein the cooled microbead particles pass through an 80-100 mesh sieve.