Copper-containing tailings waterborne latex paint, method of making and use thereof

Abstract

The present disclosure provides a kind of copper tailing water-based emulsion paint and its preparation method and application, the paint includes: water: 22wt%~23wt%;pH regulator: 0.2wt%~0.5wt%;Wetting dispersant: 0.3wt%~0.8wt%;Leveling agent: 1.0wt%~1.3wt%;Defoaming agent: 0.15wt%~0.35%;Preservative: 0.15wt%~0.20wt%;Copper tailing: 37wt%~40wt%;Emulsion: 30wt%~31wt%;Film forming aid: 4.5wt%~5.0wt%;Thickener: 0.5wt%~1.8wt%。By changing the particle size ratio of copper tailing and adjusting the viscosity of the paint, the paint has good water resistance, alkali resistance, scrub resistance and storage stability, high utilization rate of copper tailing, improves economic benefit, turns waste into treasure, copper tailing as pigment filler reduces the production cost of water-based paint.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure belongs to the technical field of green and environmentally friendly coatings, and particularly relates to a copper tailing-containing water-based emulsion paint as well as a preparation method and application thereof. BACKGROUND

[0002] The copper tailing is a fine powder and granular waste left after the copper ore is crushed and the copper is selected. After a large amount of copper tailings are generated, they are mainly treated in the form of filling the depression or damming, which not only occupies a large area of land, but also is an important pollution source of soil, water pollution and ecological destruction around the mine. Finding a method to consume a large amount of tailings is an effective way to solve the above problems and resource utilization.

[0003] The emulsion paint is a water-based paint prepared by adding pigments and fillers and various additives to a synthetic resin emulsion as a base material with water as a dispersion medium. The main film-forming substance of the emulsion paint is emulsion, which plays a role in fixing pigments and adhering to the wall to form a coating film, providing the most basic physical properties of the coating and resisting the damage of various external factors. The pigments and fillers are insoluble fine particles, which are an important part of the paint. The pigments and fillers not only have the functions of hiding and imparting color to the coating film, but also can improve the mechanical strength of the coating film, improve the rheological properties, weather resistance and corrosion resistance of the paint, and reduce the cost. Common pigments and fillers include titanium dioxide, iron red, calcium carbonate (light and heavy), kaolin, diatomite and the like.

[0004] There are methods for preparing paint from tailings in the prior art, such as preparing paint from quartz sand tailings or waste jade powder. However, the preparation process of the paint in the prior art cannot completely eliminate the use of common fillers for paint, such as talc, titanium dioxide and the like, resulting in low utilization rate of tailings and little room for reducing the production cost of the paint. In addition, the stability of the tailings water-based paint is not discussed in depth.

[0005] The copper tailing is a multi-component complex tailing, which contains rich silicate minerals and carbonate minerals, similar to the common fillers for paint. The copper tailing itself has a brick red color, which can be used as a pigment and filler for paint. There is no related report on the copper tailing-containing water-based emulsion paint and the preparation method thereof. SUMMARY

[0006] The embodiment of the present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a copper tailing-containing water-based emulsion paint as well as a preparation method and application thereof.

[0007] An aspect of the embodiment of the present disclosure provides a copper tailing-containing water-based emulsion paint, which comprises:

[0008] Water: 22wt%-23wt%;

[0009] pH adjusting agent: 0.2wt%~0.5wt%;

[0010] wetting dispersant: 0.3wt%~0.8wt%;

[0011] leveling agent: 1.0wt%~1.3wt%;

[0012] antifoaming agent: 0.15wt%~0.35wt%;

[0013] preservative: 0.15wt%~0.20wt%;

[0014] copper tailings: 37wt%~40wt%;

[0015] emulsion: 30wt%~31wt%;

[0016] film-forming aid: 4.5wt%~5.0wt%;

[0017] thickening agent: 0.5wt%~1.8wt%; wherein,

[0018] the component content of the copper tailings includes: SiO2, 20wt%~30wt%; CaO, 25wt%~35wt%; Fe2O3, 10wt%~20wt%; Al2O3, 5wt%~15wt%;

[0019] the particle size composition of the copper tailings includes:

[0020] 300μm~100μm, 0.4wt%~0.5wt%;

[0021] 100μm~45μm, 2.0wt%~2.5wt%;

[0022] less than 45μm, 97wt%~97.5wt%.

[0023] Alternatively, the particle size composition of the copper tailings specifically further includes:

[0024] 300μm~200μm, 0.35wt%~0.40wt%;

[0025] 200μm~100μm, 0.10wt%~0.15wt%;

[0026] 100μm~75μm, 0.2wt%~0.5wt%;

[0027] 75μm~45μm, 1.5wt%~2.0wt%;

[0028] 45μm~20μm, 8wt%~10wt%;

[0029] 20μm~10μm, 10wt%~15wt%;

[0030] 10μm~5μm, 15wt%~18wt%;

[0031] 5μm~2μm, 25wt%~27wt%;

[0032] 2μm~1μm, 15wt%~17wt%;

[0033] 1μm~0μm, 14wt%~16wt%.

[0034] Optionally, further comprising:

[0035] The thickening agent: 1.0wt%~1.8wt%.

[0036] Optionally, the emulsion is at least one of a styrene-acrylate emulsion, a pure-acrylate emulsion, a silicone-acrylate emulsion, and a tertiary-acrylate emulsion.

[0037] Optionally, the thickening agent is at least one of hydroxyethyl cellulose, an associative polyurethane, and a polyacrylate thickening agent.

[0038] Optionally, the wet dispersant is at least one of a polycarboxylic acid sodium salt type dispersant, sodium dodecyl sulfonate, an alkyl pyridine salt chloride, a polyacrylic acid derivative type dispersant, and a polymethacrylic acid derivative type dispersant.

[0039] Another aspect of the present disclosure provides a preparation method of a copper tailing-containing water-based emulsion paint, for preparing the copper tailing-containing water-based emulsion paint described above, the method comprising the following steps:

[0040] Grinding and sieving the copper tailings, and mixing and matching according to the corresponding particle size composition;

[0041] Taking an appropriate amount of water in a container, under the condition of stirring at 300r / min~500r / min, sequentially adding the pH adjuster, the wet dispersant, the leveling agent, and the preservative, adjusting the rotation speed to 800r / min~1000r / min and stirring for 5min~15min;

[0042] Reducing the rotation speed, under the condition of stirring at 300r / min~500r / min, slowly adding the emulsion into the container, adjusting the rotation speed to 800r / min~1000r / min, adding the defoaming agent while stirring, and stirring for 5min~15min;

[0043] Lower the rotating speed to 300r / min-500r / min, slowly add the prepared copper tailings into the container, adjust the rotating speed to 700r / min-900r / min, and stir for 5min-15min;

[0044] Lower the rotating speed to 300r / min-500r / min, sequentially add the film forming aid and the thickening agent, increase the rotating speed to 1000r / min-1200r / min and stir, if bubbles are still found during the process, add the defoaming agent, after 25min-35min, adjust the rotating speed to 700r / min-900r / min, and continue to stir for 25min-35min, to obtain the paint.

[0045] Optionally, after obtaining the paint, the method further comprises:

[0046] Place the prepared paint for 1 day-2 days, after the paint is stable, apply the paint on the asbestos-free fiber cement flat plate, and place in an environment of 20℃-30℃ for 3 days-7 days to completely dry the paint.

[0047] Optionally, after the paint is completely dried, the method further comprises:

[0048] Detect the comprehensive performance of the paint, and the detection indexes at least include water resistance, alkali resistance, scrub resistance and storage stability.

[0049] Another aspect of the embodiment of the present disclosure provides an application of the copper tailings-containing water-based emulsion paint as described above, which is applied to an exterior wall paint.

[0050] The copper tailings-containing water-based emulsion paint, the preparation method and the application thereof provide a water-based paint using copper tailings as a pigment and filler, by setting the particle size composition of the copper tailings and adjusting the viscosity range of the paint, and by adding other commonly used paint additives, a water-based paint is obtained, which has stable copper tailings state, alkali resistance, water resistance, scrub resistance and storage stability, and meets the GB / T9755-2014 "Synthetic Resin Emulsion Exterior Wall Paint" standard, wherein the copper tailings-containing water-based emulsion paint has strong storage stability and high scrub resistance, and the storage stability exceeds three months.

[0051] The copper tailings-containing water-based emulsion paint of the embodiment of the present disclosure completely uses copper tailings as the paint filler, without adding other common paint pigments and fillers, the copper tailings can be used as a substitute for commonly used paint pigments and fillers such as calcium carbonate, talc and kaolin, which is green and environmentally friendly, reduces the production cost of the paint, and improves the economic benefits.

[0052] The utilization rate of the copper tailing in the copper tailing-containing water-based emulsion paint reaches 40%, the resource comprehensive utilization rate is high, the copper tailing is largely accommodated, a new solution is provided for bulk utilization of the copper tailing, and the environmental problems caused by the tailing are solved.

[0053] The copper tailing itself is brick red, and no additional pigment is needed to impart color to the paint, thereby reducing the production cost of the paint, turning waste into treasure, and improving economic benefits.

[0054] The copper tailing has a suitable particle size ratio, and both large and small particle size tailings are used, the tailing application is used, and the grinding and screening cost of the tailing is reduced; in addition, the problem that the copper tailing is prone to sedimentation in the paint system due to particle reasons is solved, the suspension stability of the tailing in the paint system is enhanced, and the filler sedimentation can be prevented for more than 3 months. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 A preparation method flowchart of a copper tailing-containing water-based emulsion paint according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0056] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the embodiments of the present disclosure are further described in detail below with reference to the drawings and specific embodiments.

[0057] An aspect of an embodiment of the present disclosure provides a copper tailing-containing water-based emulsion paint, comprising: water: 22wt%-23wt%; pH regulator: 0.2wt%-0.5wt%; wetting dispersant: 0.3wt%-0.8wt%; leveling agent: 1.0wt%-1.3wt%; defoaming agent:

[0058] 0.15wt%-0.35wt%; preservative: 0.15wt%-0.20wt%; copper tailing:

[0059] 37wt%-40wt%; emulsion: 30wt%-31wt%; film-forming aid: 4.5wt%-5.0wt%; thickening agent: 0.5wt%-1.8wt%. Wherein, the component content of the copper tailing includes: SiO2,

[0060] 20wt%-30wt%; CaO, 25wt%-35wt%; Fe2O3, 10wt%-20wt%; Al2O3, 5wt%-15wt%. The particle size composition of the copper tailing includes: 300μm

[0061] ~100 μm, 0.4wt%~0.5wt%; 100 μm~45 μm, 2.0wt%~2.5wt%; less than 45 μm, 97wt%~97.5wt%.

[0062] The anti-freezing leveling agent is used as the leveling agent. The copper tailings are used as the color filler of the paint. In the embodiment, the copper tailings produced in the mineral separation of the skarn type copper mine are selected as the color filler.

[0063] The copper tailings water-based emulsion paint of the embodiment of the present disclosure uses the copper tailings as the color filler of the water-based paint. By changing the particle size ratio of the copper tailings and adjusting the viscosity of the paint, the suspension stability of the tailings in the paint system is enhanced, the paint filler does not settle for more than 3 months, and the paint has good water resistance, alkali resistance and scrub resistance. The utilization rate of the copper tailings is about 40%, which achieves the purpose of large-scale disposal of the copper tailings. The copper tailings used as the color filler of the water-based paint can further reduce the production cost of the water-based paint, improve the economic benefit, and turn waste into treasure, which can effectively reduce the environmental problems caused by the storage of the copper tailings.

[0064] Further preferably, in the embodiment, the particle size composition of the copper tailings specifically further includes: 300 μm~200 μm, 0.35wt%~0.40wt%; 200 μm~100 μm, 0.10wt%~0.15wt%; 100 μm~75 μm, 0.2wt%~0.5wt%; 75 μm~45 μm, 1.5wt%~2.0wt%; 45 μm~20 μm, 8wt%~10wt%; 20 μm~10 μm, 10wt%~15wt%; 10 μm~5 μm, 15wt%~18wt%; 5 μm~2 μm, 25wt%~27wt%; 2 μm~1 μm, 15wt%~17wt%; 1 μm~0 μm, 14wt%~16wt%.

[0065] The copper tailings water-based emulsion paint of the embodiment of the present disclosure uses the copper tailings with a suitable particle size ratio, and uses large and small particle size tailings, which reduces the grinding and screening cost of the tailings. The sum of the silicate and calcium salt content in the formed composition of the copper tailings is more than 50%, which provides sufficient strength for the paint to withstand more scrubbing times. In addition, the copper tailings have large and small particle sizes, which solves the problem of easy settlement of the copper tailings in the paint system due to particle reasons, enhances the suspension stability of the tailings in the paint system, and can prevent the paint filler from settling for more than 3 months.

[0066] Preferably, in the embodiment, the concentration of the thickening agent is 1.0wt%~1.8wt%, and the amount of the thickening agent in this range can make the viscosity of the tailings water-based paint be about 95KU~100KU, and the paint system is relatively stable under this condition.

[0067] Exemplarily, the emulsion is at least one of a styrene-acrylic emulsion, a pure acrylic emulsion, a silicone-acrylic emulsion, and a tertiary acrylic emulsion. Of course, other emulsions can be used according to actual needs, and the embodiments are not limited in this regard.

[0068] Exemplarily, the thickening agent is at least one of hydroxyethyl cellulose, an associative polyurethane, and a polyacrylic thickening agent. Of course, other thickening agents can be used according to actual needs, and the embodiments are not limited in this regard.

[0069] Exemplarily, the wet dispersant is at least one of a polycarboxylic acid sodium salt type dispersant, sodium dodecyl sulfonate, an alkyl pyridine salt chloride, a polyacrylic acid derivative type dispersant, and a polymethacrylic acid derivative type dispersant. Of course, other wet dispersants can be used according to actual needs, and the embodiments are not limited in this regard.

[0070] Further preferably, in the embodiments, the copper tailings contain a copper tailings water-based emulsion paint with a composition of:

[0071] Water is 22.17 wt%, a pH regulator is 0.3 wt%, a wet dispersant is 0.8 wt%, a leveling agent is 1.28 wt%, an antifoaming agent is 0.33 wt%, a preservative is 0.15 wt%, copper tailings are 38.2 wt%, an emulsion is 30.6 wt%, a film-forming aid is 4.84 wt%, and a thickening agent is 1.33 wt% to 1.7 wt%. The copper tailings contain SiO2 20 wt% to 30 wt%, CaO 25 wt% to 35 wt%, Fe2O3 10 wt% to 20 wt%, and Al2O3 5 wt% to 15 wt%. The copper tailings have a particle size grading of 300 μm to 200 μm 0.4%, 200 μm to 100 μm 0.1%, 100 μm to 75 μm 0.3%, 75 μm to 45 μm 1.8%, 45 μm to 20 μm 10%, 20 μm to 10 μm 14%, 10 μm to 5 μm 16.4%, 5 μm to 2 μm 26%, 2 μm to 1 μm 16%, and 1 μm to 0 μm 15%.

[0072] As shown in Figure 1 Another aspect of the embodiments of the present disclosure provides a preparation method S100 of a copper tailings-containing water-based emulsion paint for preparing the copper tailings-containing water-based emulsion paint described above. The specific composition of the copper tailings-containing water-based emulsion paint has been described in detail above, and will not be described herein again. The preparation method S100 specifically includes the following steps:

[0073] S110, grinding and screening the copper tailings, and mixing the copper tailings according to the corresponding particle size composition.

[0074] Specifically, in the present embodiment, a copper tailing produced in the beneficiation of a skarn type copper mine is selected as the color filler. The copper tailing is ground and screened to divide the copper tailing into different particle size gradations. Specifically, as shown in Table 2, the particle size gradation of the copper tailing is: 300 μm-200 μm, 0.4%; 200 μm-100 μm, 0.1%; 100 μm-75 μm, 0.3%; 75 μm-45 μm, 1.8%; 45 μm-20 μm, 10%; 20 μm-10 μm, 14%; 10 μm-5 μm, 16.4%; 5 μm-2 μm, 26%; 2 μm-1 μm, 16%; 1 μm-0 μm, 15%.

[0075] S120, an appropriate amount of water is taken in a container, and under the stirring condition of 300 r / min-500 r / min, the pH regulator, the wetting dispersant, the leveling agent and the preservative are sequentially added, the high speed is adjusted to 800 r / min-1000 r / min and stirred for 5 min-15 min.

[0076] Specifically, as shown in Table 1, an appropriate amount of water is taken in a container, and under the stirring condition of 400 r / min, the pH regulator, the wetting dispersant, the leveling agent and the preservative shown in Table 1 are sequentially added, the high speed is adjusted to 900 r / min and stirred for 10 min.

[0077] In this step, because the pH regulator, the wetting dispersant, the leveling agent and the preservative are used in small amounts, they are added in the initial step to facilitate their dissolution and dispersion.

[0078] S130, the speed is reduced, and under the stirring condition of 300 r / min-500 r / min, the emulsion is slowly added into the container, the speed is adjusted to 800 r / min-1000 r / min, the defoaming agent is added while stirring, and stirred for 5 min-15 min.

[0079] Specifically, the speed is reduced, and under the stirring condition of 500 r / min, the emulsion shown in Table 1 is slowly added into the container, the speed is adjusted to 900 r / min, the defoaming agent is added while stirring, and stirred for 10 min.

[0080] In this step, the defoaming agent is added at the stage of adding the emulsion, and the defoaming effect is good.

[0081] S140, the speed is reduced to 300 r / min-500 r / min, and the prepared copper tailing is slowly added into the container, the speed is adjusted to 700 r / min-900 r / min, and stirred for 5 min-15 min.

[0082] Specifically, the rotation speed is reduced to 400 r / min, the prepared copper tailings in Table 1 are slowly added into the container, the rotation speed is adjusted to 800 r / min, and stirring is performed for 10 min.

[0083] In this step, the copper tailings filler is added after the emulsion is added, which helps the dispersion of the copper tailings filler particles in the emulsion and easy mixing.

[0084] S150, the rotation speed is reduced to 300 r / min-500 r / min, the film forming aid and the thickening agent are sequentially added, the rotation speed is increased to 1000 r / min-1200 r / min and stirring is performed, if bubbles are still found in this process, the defoaming agent is added, after 25 min-35 min, the rotation speed is adjusted to 700 r / min-900 r / min, and stirring is continued for 25 min-35 min, to obtain the coating.

[0085] Specifically, the rotation speed is reduced to 400 r / min, the film forming aid and the thickening agent shown in Table 1 are sequentially added, the rotation speed is increased to 1000 r / min and stirring is performed, if bubbles are still found in this process, the defoaming agent is added, after 30 min, the rotation speed is adjusted to 800 r / min, and stirring is continued for 30 min, to obtain the coating.

[0086] In this step, the film forming aid and the thickening agent are finally added, which helps to reduce the coagulation of these two substances on the emulsion and increase the stability of the coating system. The defoaming agent is continuously added to eliminate the bubbles generated in the final stirring process.

[0087] Illustratively, after obtaining the coating, the method further comprises: placing the prepared coating for 1 day-2 days, after the coating is stable, coating the coating on an asbestos-free fiber cement flat plate, placing the coating in an environment of 20℃-30℃ for 3 days-7 days, and completely drying the coating.

[0088] Specifically, the prepared coating is placed for 1 day, after the coating is stable, the coating is coated on an asbestos-free fiber cement flat plate, and the coating is placed in an environment of 25℃ for 3 days-7 days, and the coating is completely dried.

[0089] After the coating is completely dried, the method further comprises: detecting the comprehensive performance of the coating, and the detection indexes at least include water resistance, alkali resistance, washability and storage stability.

[0090] The preparation method of the copper tailing-containing water-based emulsion paint of the embodiments of the present disclosure adds copper tailings as the color and filler of the water-based paint, enhances the suspension stability of the tailings in the paint system by changing the particle size ratio of the copper tailings and adjusting the viscosity of the paint, can prevent the settling of the fillers for more than 3 months, and has good water resistance, alkali resistance and scrub resistance. The utilization rate of the copper tailings in the preparation process is about 40%, which achieves the purpose of large-scale disposal of copper tailings. The use of copper tailings as the color and filler of the water-based paint can further reduce the production cost of the water-based paint, improve the economic benefit, and turn waste into treasure, which can effectively alleviate the environmental problems caused by the storage of copper tailings.

[0091] Another aspect of the embodiments of the present disclosure provides a use of the copper tailing-containing water-based emulsion paint described above. The specific composition of the copper tailing-containing water-based emulsion paint has been described in detail above, and will not be repeated here. The copper tailing-containing water-based emulsion paint is applied to exterior wall paint.

[0092] The copper tailing-containing water-based emulsion paint of the embodiments of the present disclosure is applied to exterior wall paint, meets the standard requirements of GB / T9755-2014 “Synthetic Resin Emulsion Exterior Wall Paint”, has a storage stability of the tailings paint of more than three months, and has good water resistance, alkali resistance, scrub resistance and storage stability. The paint filler is completely copper tailings, without adding other common paint color and filler, which reduces the production cost of the paint and improves the economic benefit. The copper tailings are brick red in color, and no additional pigment is needed to impart color to the paint, which reduces the production cost of the paint and improves the economic benefit. The utilization rate of the copper tailings is 40%, the resource comprehensive utilization rate is high, the environmental problems caused by the tailings are solved, and it is green and environmentally friendly.

[0093] The copper tailing-containing water-based emulsion paint, the preparation method and the use thereof in the embodiments of the present disclosure are further described through several specific embodiments.

[0094] Comparative Example 1

[0095] The copper tailings are ground, sieved, and mixed according to the particle size composition 1 in Table 2. The corresponding components are weighed according to the formula 1 in Table 1 to prepare the copper tailing-containing water-based emulsion paint. The steps for preparing the copper tailing-containing water-based emulsion paint are as follows:

[0096] 1) The corresponding water is weighed according to the formula 1 in Table 1 in a beaker, and the pH adjuster, wetting dispersant, leveling agent and preservative shown in the formula 1 in Table 1 are added in sequence under the condition of stirring at 400 r / min. The stirring speed is 900 r / min.

[0097] 2) The stirring speed is reduced to 500 r / min, the emulsion shown in the formula 1 in Table 1 is slowly added, the stirring speed is adjusted to 900 r / min, the defoaming agent is added while stirring, and the stirring is continued for 10 min.

[0098] 3) Reduce the rotation speed to 400 r / min, slowly add the copper tailings with particle size composition 1 in Table 2, after the addition is completed, adjust the rotation speed to 800 r / min, and stir for 10 min.

[0099] 4) Reduce the rotation speed to 400 r / min, and finally add the film forming aids and thickening agents shown in Formula 1 in Table 1 in sequence, increase the rotation speed, and stir at a high rotation speed of 1000 r / min. If bubbles are still found during the process, add a few drops of defoaming agent, adjust the rotation speed to 800 r / min after 30 min, and continue to stir for 30 min to prepare the coating 1.

[0100] 5) After the prepared coating 1 is placed for 1 day, the coating 1 is applied on the asbestosis-free fiber cement flat plate after the coating 1 is stable, and is placed in an environment at 25℃ for 3-7 days to completely dry the coating 1. After the coating 1 is completely dried, the comprehensive performance of the coating 1 is detected, and the detection indexes at least include water resistance, alkali resistance, scrub resistance and storage stability. The detection results of the comprehensive performance detection are shown in Table 3.

[0101] Comparative Example 2

[0102] The copper tailings are ground, screened, and mixed uniformly according to the particle size composition 1 in Table 2. The corresponding components are weighed according to Formula 3 in Table 1 to prepare the water-based latex coating containing copper tailings. The steps of preparing the water-based latex coating containing copper tailings are the same as those in Comparative Example 1 to prepare the coating 2. The detection results of the comprehensive performance detection of the prepared coating 2 are shown in Table 3.

[0103] Comparative Example 3

[0104] The copper tailings are ground, screened, and mixed uniformly according to the particle size composition 1 in Table 2. The corresponding components are weighed according to Formula 5 in Table 1 to prepare the water-based latex coating containing copper tailings. The steps of preparing the water-based latex coating containing copper tailings are the same as those in Comparative Example 1 to prepare the coating 3. The detection results of the comprehensive performance detection of the prepared coating 3 are shown in Table 3.

[0105] Example 1

[0106] The copper tailings are ground, screened, and mixed uniformly according to the particle size composition 2 in Table 2. The corresponding components are weighed according to Formula 2 in Table 1 to prepare the water-based latex coating containing copper tailings. The steps of preparing the water-based latex coating containing copper tailings are the same as those in Comparative Example 1 to prepare the coating 4. The detection results of the comprehensive performance detection of the prepared coating 4 are shown in Table 3.

[0107] Example 2

[0108] The copper tailings were ground, screened, and mixed uniformly according to the particle size composition 2 in Table 2. The corresponding components were weighed according to the formula 3 in Table 1 to prepare the copper tailings-containing water-based latex paint. Among them, the steps of preparing the copper tailings-containing water-based latex paint were the same as those in Comparative Example 1, and paint 5 was prepared. The detection results of the comprehensive performance detection of the prepared paint 5 are shown in Table 3.

[0109] Example 3

[0110] The copper tailings were ground, screened, and mixed uniformly according to the particle size composition 2 in Table 2. The corresponding components were weighed according to the formula 4 in Table 1 to prepare the copper tailings-containing water-based latex paint. Among them, the steps of preparing the copper tailings-containing water-based latex paint were the same as those in Comparative Example 1, and paint 6 was prepared. The detection results of the comprehensive performance detection of the prepared paint 6 are shown in Table 3.

[0111] Example 4

[0112] The copper tailings were ground, screened, and mixed uniformly according to the particle size composition 2 in Table 2. The corresponding components were weighed according to the formula 5 in Table 1 to prepare the copper tailings-containing water-based latex paint. Among them, the steps of preparing the copper tailings-containing water-based latex paint were the same as those in Comparative Example 1, and paint 7 was prepared. The detection results of the comprehensive performance detection of the prepared paint 7 are shown in Table 3.

[0113] Table 1 Formula composition of copper tailings-containing water-based latex paint

[0114]

[0115] Table 2 Two particle size compositions of copper tailings

[0116]

[0117] Table 3 Detection results of comprehensive performance detection in each comparative example and each embodiment

[0118]

[0119] In summary, as can be seen from Table 3, the drying time, water resistance and alkali resistance of the copper tailings-containing water-based latex paint in Comparative Examples 1 to 3 and Examples 1 to 4 in the embodiments of the present disclosure are all within the standard requirements of GB / T9755-2014 “Synthetic resin emulsion exterior wall coating”, while the storage stability of the paint in Comparative Examples 1 to 3 and Examples 1 and 2 cannot meet the application requirements. The storage stability of the paint is related to the particle size and amount of the filler, the type and amount of the dispersing agent, and the viscosity of the paint.

[0120] As shown in Table 2, two different copper tailings particle size compositions were designed according to the principle of application of copper tailings of different particle sizes. The particle size composition 1 is coarser, and the particle size composition 2 is finer. As can be seen from Comparative Example 1 to Comparative Example 3, when the copper tailings with particle size composition 1 are used to prepare the paint, the paint has obvious filler settlement at low and high viscosities, which affects the performance of the paint and reduces the washing resistance, indicating that the particle size composition is too large to be used as the particle size ratio of copper tailings in the paint. However, increasing the viscosity of the paint will affect the workability of the paint.

[0121] As can be seen from Example 1 and Example 2, both of them use copper tailings with particle size composition 2, and use Formulation 2 and Formulation 3 to prepare water-based latex paint containing copper tailings. The particle size of the copper tailings is small, but the concentration of the thickening agent added is not high, so the viscosity of the prepared paint is low. The water-based latex paint containing copper tailings prepared in this way has obvious settlement of copper tailings within one week, which affects the performance of the paint. Therefore, when using copper tailings with smaller particle size, the viscosity of the paint needs to meet the requirements to prepare a paint with the required performance.

[0122] As can be seen from Example 4 and Example 5, both of them use copper tailings with particle size composition 2, and use Formulation 4 and Formulation 5 to prepare water-based latex paint containing copper tailings. The particle size of the copper tailings used in Example 4 and Example 5 is small, and the content of the thickening agent is high, so the viscosity of the paint is suitable, and the viscosity of the paint is about 95K-100KU. The storage stability of the water-based latex paint containing copper tailings prepared in Example 4 and Example 5 is significantly better than that of Example 1 and Example 2. After standing experiment, it is found that the paint prepared in Example 4 and Example 5 has not been settled obviously for 3 months after preparation, and the washing resistance of the paint reaches 5000 times. That is to say, the drying time, water resistance, alkali resistance, washing resistance and storage stability of the water-based latex paint containing copper tailings prepared in Example 4 and Example 5 all meet the standard requirements of GB / T9755-2014 "Synthetic Resin Emulsion Exterior Wall Coatings", and the suspension stability of copper tailings in the paint system is enhanced, which can last for more than 3 months without filler settlement.

[0123] As can be seen from Table 1, Example 5 increases the amount of dispersant based on Example 4, making the paint system more stable. Therefore, Example 5 is the optimal example of water-based latex paint containing copper tailings, that is, Formulation 5 is the best formula for this copper tailings. It is worth noting that when preparing the paint, the amount of thickening agent needs to be adjusted so that the viscosity of the paint system is in the range of 95KU-100KU. Under this condition, the paint system is relatively stable, so the content of the thickening agent in Formulation 5 is in this range of values.

[0124] It can be understood that the above implementation is only an exemplary implementation adopted for illustrating the principles of the embodiments of the present disclosure, however, the embodiments of the present disclosure are not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and principle of the embodiments of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the embodiments of the present disclosure.

Claims

1. A water-based emulsion paint containing copper tailings, characterized by, Comprise: Water: 22wt%~23wt%; pH regulator: 0.2wt%~0.5wt%; Wetting dispersant: 0.3wt%~0.8wt%; Leveling agent: 1.0wt%~1.3wt%; Defoaming agent: 0.15wt%~0.35wt%; Preservative: 0.15wt%~0.20wt%; Copper tailings: 37wt%~40wt%; Emulsion: 30wt%~31wt%; Film forming aid: 4.5wt%~5.0wt%; Thickening agent: 1.0wt%~1.8wt%; wherein, The component content of the copper tailings includes: SiO2, 20wt%~30wt%; CaO, 25wt%~35wt%; Fe2O3, 10wt%~20wt%; Al2O3, 5wt%~15wt%; The particle size composition of the copper tailings includes: 300μm~200μm, 0.35wt%~0.40wt%; 200μm~100μm, 0.10wt%~0.15wt%; 100μm~75μm, 0.2wt%~0.5wt%; 75μm~45μm, 1.5wt%~2.0wt%; 45μm~20μm, 8wt%~10wt%; 20μm~10μm, 10wt%~15wt%; 10μm~5μm, 15wt%~18wt%; 5μm~2μm, 25wt%~27wt%; 2μm~1μm, 15wt%~17wt%; 1μm~0μm, 14wt%~16wt%.

2. The copper-containing tailings aqueous emulsion paint according to claim 1, characterized in that, The emulsion is at least one of styrene-acrylic emulsion, pure acrylic emulsion, silicone-acrylic emulsion, and tertiary acrylic emulsion.

3. The copper-containing tailings aqueous emulsion paint according to claim 1, characterized in that, The thickening agent is at least one of hydroxyethyl cellulose, associative polyurethane, and polyacrylic thickening agent.

4. The copper-containing tailings aqueous emulsion paint according to claim 1, characterized in that, The wetting dispersant is at least one of polycarboxylic acid sodium salt type dispersant, sodium dodecyl sulfonate, alkyl pyridine salt chloride, polyacrylic acid derivative type dispersant, and polymethacrylic acid derivative type dispersant.

5. A process for the preparation of a water-based emulsion paint containing copper tailings as claimed in any one of claims 1 to 4 characterised in that, The method comprises the following steps: Grinding and screening the copper tailings, and proportioning and uniformly mixing according to the corresponding particle size composition; Taking an appropriate amount of water in a container, under the condition of stirring at 300r / min~500r / min, sequentially adding the pH regulator, the wetting dispersant, the leveling agent, and the preservative, adjusting the rotation speed to 800r / min~1000r / min and stirring for 5min~15min; Reducing the rotation speed, under the condition of stirring at 300r / min~500r / min, slowly adding the emulsion into the container, adjusting the rotation speed to 800r / min~1000r / min, adding the defoaming agent while stirring, and stirring for 5min~15min; Reducing the rotation speed to 300r / min~500r / min, slowly adding the prepared copper tailings into the container, adjusting the rotation speed to 700r / min~900r / min, and stirring for 5min~15min; The rotation speed is reduced to 300 r / min~500 r / min, the film forming aid and the thickening agent are added in sequence, the rotation speed is increased to 1000 r / min~1200 r / min and stirring is carried out, if bubbles are still found in the process, the defoaming agent is added, 25min~35min later, the rotation speed is adjusted to 700 r / min~900 r / min, and stirring is continuously carried out for 25min~35min, to obtain the paint.

6. Use of a copper-containing tailings aqueous emulsion paint according to any one of claims 1 to 4 or a copper-containing tailings aqueous emulsion paint obtained by a process according to claim 5, characterized in that, The copper-containing tailing water-based emulsion paint is applied to an exterior wall paint.

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