High-hardness low-energy-consumption artificial color sand and preparation method thereof

Abstract

The present application relates to the technical field of artificial color sand, and discloses a kind of high-hardness low-energy-consumption artificial color sand, comprising the following components: coloring base material 1000 parts, color powder 5-15 parts, binder 25-35 parts;The binder in it includes the following components by weight fraction: acid silica sol 40-60 parts, methyltrimethoxysilane 30-60 parts, toughening emulsion 15-30 parts, deionized water 10-30 parts, glacial acetic acid 1-3 parts.A kind of high-hardness low-energy-consumption artificial color sand preparation method, using the components of the above-mentioned high-hardness low-energy-consumption artificial color sand, for preparing artificial color sand.The artificial color sand of the present application has the characteristics of high wear resistance, high aging resistance and high gloss, is resistant to acid and alkali, and is resistant to corrosion, can better meet the use requirements of pavement color sand, and its preparation method can prepare the above-mentioned artificial color sand at normal temperature, can greatly reduce energy consumption, reduce cost, realize energy saving and emission reduction.

Description

Technical Field

[0001] This invention relates to the field of artificial colored sand technology, and in particular to a high-hardness, low-energy-consumption artificial colored sand and its preparation method. Background Technology

[0002] In today's rapidly developing industrial society, people's concept of "beauty" has become more visual, and they have increasingly higher quality requirements for life. In the decoration of exterior buildings, colorful decorations have gained popularity. Colored sand, as a new type of decorative material, has become an indispensable part of building decoration materials due to its advantages such as bright colors, environmental friendliness, stable performance, and rich texture. However, the over-exploitation of natural colored sand has led to dwindling resources and high prices, forcing people to choose other methods of producing colored sand—namely, artificial colored sand—to replace natural colored sand ore, reduce costs, and conserve ecological resources. Colored sand is widely used in architectural coatings such as stone-like paint and is also a major raw material for colored sand flooring, serving as a surface material for colored pavements.

[0003] Artificial colored sand is mainly prepared through the following methods. The first is the room-temperature dyeing method, where organic resin is used to prepare a colored paint which is then applied to the surface of the sand particles and dried at room temperature. This method has the advantages of simple process, low energy consumption, and bright colors, but the sand is prone to fading and has poor weather resistance, making it unsuitable for colored pavements. The second is the low-temperature curing method using inorganic binders, where silicate-based inorganic binders are mixed with inorganic pigments and applied to the surface of the sand particles, then baked and cured at 200-300℃. This method has the advantages of high production volume and low cost, but the sand particles are prone to moisture absorption and alkali return, have low gloss, high pH, ​​and high water absorption. Its application in colored pavements carries the risk of alkali return and discoloration. The third is the high-temperature sintering method, where inorganic color glaze is adhered to the surface of the sand particles, and then sintered at 800-1000℃ for coloring. The colored sand produced by this method has long-lasting color, does not fade, is resistant to acids and alkalis, and is resistant to high temperatures, making it the main type of artificial colored sand currently used in colored pavements. However, the process is complex and energy consumption is too high, which does not comply with national energy conservation and emission reduction policies.

[0004] There are also some existing technologies for artificial colored sand and its preparation methods, such as

[0005] (1) Chinese invention patent with application number CN201410412978.9 and titled "A High-Temperature Sintered Colored Sand and Its Preparation Method Thereof" provides a colored sand and its preparation method that can be produced continuously, making it easy to control the color adjustment of the colored sand and making the production simple and fast. However, it mainly uses silicate mineral particles as materials, which requires high-temperature sintering and has high energy consumption.

[0006] (2) Chinese invention patent with application number CN202210667558.X and titled "A Method for Preparing Artificial Colored Sand Based on High Weather Resistance Solid Waste" provides a method for preparing artificial colored sand, but it mainly involves coating a substrate composed of solid waste particles such as waste ore and waste glass to prepare artificial colored sand.

[0007] (3) Chinese invention patent with application number CN202010620752.3 and titled "A Resin-based Artificial Colored Sand and Its Preparation Method Thereof" provides an artificial colored sand and its preparation method, but it cannot be prepared at room temperature and has high energy consumption. Summary of the Invention

[0008] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a high-hardness, low-energy-consumption artificial colored sand and its preparation method. The artificial colored sand has the characteristics of high wear resistance, high aging resistance, and high gloss. It is also resistant to acids and alkalis and rust, and can better meet the requirements of colored sand for road surfaces. Moreover, its preparation method can prepare the above-mentioned artificial colored sand at room temperature, which can greatly reduce energy consumption, reduce costs, and achieve energy conservation and emission reduction.

[0009] This invention is achieved using the following technical solution: a high-hardness, low-energy artificial colored sand, comprising the following components: 1000 parts of coloring substrate, 5-15 parts of color powder, and 25-35 parts of binder;

[0010] The binder, by weight, comprises the following components: 40-60 parts of acidic silica sol, 30-60 parts of methyltrimethoxysilane, 15-30 parts of toughening emulsion, 10-30 parts of deionized water, and 1-3 parts of glacial acetic acid.

[0011] The preferred coloring substrate is 20-40 mesh quartz sand.

[0012] The colorant is preferably an inorganic colorant.

[0013] A method for preparing high-hardness, low-energy-consumption artificial colored sand, using the aforementioned components, includes the following steps:

[0014] Step 1: Add the coloring substrate and color powder to the mixer according to the formula. The mixing speed is 900-1100 r / min and the mixing time is 3-5 min, so that the coloring substrate and color powder are mixed evenly.

[0015] Step 2: Add the adhesive to the mixed coloring substrate according to the formula, and continue stirring at a speed of 900-1100 r / min for 3-5 min.

[0016] Step 3: The well-mixed material in the mixer is discharged into the wet sand vibrating conveyor trough. The discharge port of the wet sand vibrating conveyor trough is connected to the gas-fired drum dryer. After passing through the wet sand vibrating conveyor trough, the wet sand is slowly conveyed to the gas-fired drum dryer for drying to obtain artificial colored sand.

[0017] A method for preparing an adhesive, using the components of the aforementioned high-hardness, low-energy-consumption artificial colored sand, includes the following steps:

[0018] Step 1: Add deionized water and toughening emulsion to the mixing tank according to the formula, and add glacial acetic acid to adjust the pH of the mixture to 3-5. Stir the mixture in the mixing tank at a speed of 300 r / min until it is evenly mixed to obtain component A.

[0019] Step 2: Stir the acidic silica sol and methyltrimethoxysilane at 1000 r / min for 5-12 min according to the formula to obtain component B;

[0020] Step 3: Add component A to component B and stir at 500 r / min for 10 min. After stirring evenly, the adhesive is obtained.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention provides a high-hardness, low-energy-consumption artificial colored sand, which uses inorganic color powder to color aggregates, uses acidic silica sol reacting with silane as the main binder, and uses toughening emulsion to toughen the binder. The prepared colored sand has a high hardness of 5H or higher, and has the characteristics of high wear resistance, high aging resistance, high gloss, high mechanical stability, dense surface that is not prone to alkali return, acid and alkali resistance, and rust resistance, which can meet the requirements for use of colored sand for road surfaces.

[0023] 2. The present invention provides a method for preparing high-hardness, low-energy-consumption artificial colored sand, in which inorganic color powder is adhered to the surface of aggregate under room temperature drying to achieve the coloring effect, which can greatly reduce energy consumption, reduce costs, and achieve energy conservation and emission reduction. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the gas-fired drum dryer in the invention. Detailed Implementation

[0025] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0026] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-hardness, low-energy-consumption artificial colored sand and its preparation method.

[0027] Example 1

[0028] This invention provides a high-hardness, low-energy artificial colored sand, which comprises the following components by weight: 1000 parts of coloring substrate, 5-15 parts of color powder, and 25-35 parts of binder.

[0029] The binder, by weight, comprises the following components: 40-60 parts of acidic silica sol, 30-60 parts of methyltrimethoxysilane, 15-30 parts of toughening emulsion, 10-30 parts of deionized water, and 1-3 parts of glacial acetic acid.

[0030] The preferred coloring substrate is 20-40 mesh quartz sand. Quartz sand, used as aggregate, is a hard, wear-resistant, and chemically stable silicate mineral. Its main component is SiO2, and it is colorless and translucent with a low refractive index, making it easy to color. Its composition is consistent with that of the binder, which is beneficial for the adhesion of inorganic color powder. Inorganic color powder is preferred.

[0031] A method for preparing an adhesive, using the components of the aforementioned high-hardness, low-energy-consumption artificial colored sand, includes the following steps:

[0032] Step 1: Add deionized water and toughening emulsion to the mixing tank according to the formula, and add glacial acetic acid to adjust the pH of the mixture to 3-5. Stir the mixture in the mixing tank at a speed of 300 r / min until it is evenly mixed to obtain component A. The toughening emulsion is preferably RS-9699A stone paint emulsion from BADF Group Co., Ltd., and the glacial acetic acid is preferably CAS 64-19-7 glacial acetic acid from Nanjing Chemical Reagent.

[0033] Step 2: Stir the acidic silica sol and methyltrimethoxysilane at 1000 r / min for 5-12 min according to the formula to obtain component B; wherein the acidic silica sol is preferably SGA-30 from Shandong Yinfeng Nanomaterials Co., Ltd., and the methyltrimethoxysilane is preferably CR-M16 from Jiangxi Kerui New Materials Co., Ltd. The binder of a mixture of pure acidic silica sol and methyltrimethoxysilane is brittle and prone to cracking. Therefore, in this embodiment, a toughening emulsion is introduced for toughening treatment, and the pH of the emulsion is neutralized to acidic before the addition of component B.

[0034] Step 3: Add component A to component B and stir at 500 rpm for 10 minutes. After stirring evenly, the binder is obtained. The hydrolysis product of methyltrimethoxysilane undergoes a condensation reaction with the hydroxyl groups on the surface of silica in acidic silica sol to generate an organic-inorganic composite binder. The main chain of this binder has a Si-O-Si inorganic structure, which has higher hardness, wear resistance, and aging resistance compared to typical C-C bonds, and is unaffected by sunlight and ultraviolet rays.

[0035] A method for preparing high-hardness, low-energy-consumption artificial colored sand, using the aforementioned components, includes the following steps:

[0036] Step 1: Add the coloring substrate and color powder to the mixer according to the formula. The mixing speed is 900-1100 r / min and the mixing time is 3-5 min, so that the coloring substrate and color powder are mixed evenly.

[0037] Step 2: Add the adhesive to the mixed coloring substrate according to the formula, and continue stirring at a speed of 900-1100 r / min for 3-5 minutes.

[0038] Step three: To prevent the wet sand from accumulating and clumping in the gas-fired drum dryer due to rapid discharge, the evenly mixed material in the mixer is discharged into a wet sand vibrating conveyor trough. The discharge port of the wet sand vibrating conveyor trough is then connected to the gas-fired drum dryer. After passing through the wet sand vibrating conveyor trough, the wet sand is slowly conveyed to the gas-fired drum dryer for drying, resulting in artificial colored sand. In this embodiment, the gas-fired drum dryer uses existing technology and employs an infrared burner. The radiation generated during combustion penetrates the core of the sand, allowing heat to evenly penetrate the entire sand grain, resulting in more uniform heating. This artificial colored sand uses low-temperature drying, significantly reducing energy consumption and meeting energy-saving and environmental protection requirements.

[0039] See attached document Figure 1 As shown, the gas-fired drum dryer includes a motor 1, an inclined sand trough 2, a vibration spring 3, and a support 4. The inclined sand trough 2 located above and the support 4 located below are connected by several vibration springs 3. The motor 1 is fixed to the side of the inclined sand trough 2. The vibration motor drives the inclined sand trough 2 to vibrate, causing the wet sand in the inclined sand trough 2 to slowly move downwards. By adjusting the vibration frequency of the motor 1, the speed at which the wet sand is put into the dryer can be controlled, and the sand particles can be prevented from clumping.

[0040] To better illustrate the characteristics of the high-hardness, low-energy-consumption artificial colored sand provided in this embodiment of the invention, the performance of the artificial colored sand was tested according to the JC / T2328-2015 standard "Colored Sand for Building Facing Materials". All test items passed, and the test results are shown in the table below.

[0041]

[0042]

[0043] As can be clearly seen from the table above, the high-hardness, low-energy artificial colored sand prepared by this invention has low water absorption, a hardness of 5H or higher, high mechanical stability, a dense surface that is not prone to alkali return, and is resistant to acids, alkalis, and corrosion. It can better meet the requirements for colored sand used on roads and has high wear resistance and high hardness.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-hardness, low-energy-consumption artificial colored sand, characterized in that: By weight, it comprises the following components: 1000 parts of coloring base material, 5-15 parts of color powder, and 25-35 parts of binder; The binder, by weight, includes the following components: 40-60 parts of acidic silica sol, 30-60 parts of methyltrimethoxysilane, 15-30 parts of toughening emulsion, 10-30 parts of deionized water, and 1-3 parts of glacial acetic acid. The coloring substrate is 20-40 mesh quartz sand; The pigment mentioned is an inorganic pigment; The method for preparing the adhesive includes the following steps: Step 1: Add deionized water and toughening emulsion to the mixing tank according to the formula, and add glacial acetic acid to adjust the pH of the mixture to 3-5. Stir the mixture in the mixing tank at a speed of 300 r / min until it is evenly mixed to obtain component A. Step 2: Stir the acidic silica sol and methyltrimethoxysilane at 1000 r / min for 5-12 min according to the formula to obtain component B; Step 3: Add component A to component B and stir at 500 r / min for 10 min. After stirring evenly, the adhesive is obtained.

2. A method for preparing high-hardness, low-energy-consumption artificial colored sand according to claim 1, characterized in that, Includes the following steps: Step 1: Add the coloring substrate and color powder to the mixer according to the formula. The mixing speed is 900-1100 r / min and the mixing time is 3-5 min, so that the coloring substrate and color powder are mixed evenly. Step 2: Add the adhesive to the mixed coloring substrate according to the formula, and continue stirring at a speed of 900-1100 r / min for 3-5 min. Step 3: The well-mixed material in the mixer is discharged into the wet sand vibrating conveyor trough. The discharge port of the wet sand vibrating conveyor trough is connected to the gas-fired drum dryer. After passing through the wet sand vibrating conveyor trough, the wet sand is slowly conveyed to the gas-fired drum dryer for drying to obtain artificial colored sand.

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