Waste plastic ardealite steel slag environment-friendly material as well as preparation method and application thereof

Abstract

The invention discloses a waste plastic ardealite steel slag environment-friendly material as well as a preparation method and application thereof. The environment-friendly material comprises the following raw materials in parts by weight: 40-70 parts of waste plastic; 30 to 40 parts of phosphogypsum; 15 to 30 parts of steel slag powder; and 5-10 parts of a modifier. According to the waste plastic, ardealite and steel slag environment-friendly material provided by the invention, the waste plastic, the ardealite and the steel slag powder are used as main raw materials, three types of bulk pollutants are efficiently treated, and through the combination of the flexible matrix and the rigid filler, the material has the characteristics of good toughness, sufficient strength and durability at the same time; and the use requirements of breeding and sewage treatment scenes such as a manure leakage plate and a sewage storage tank are just met.

Description

Technical Field

[0001] This application relates to the field of agricultural and aquaculture materials technology, and in particular to an environmentally friendly material made from waste plastic phosphogypsum steel slag, its preparation method, and its application. Background Technology

[0002] With the rapid development of my country's economy, the generation of various types of waste has exploded, and environmental pollution and resource waste have become increasingly prominent problems. According to incomplete statistics, by 2025, my country's annual production of phosphogypsum will reach 70 million tons, the number of scrapped vehicles will reach 30 million (corresponding to 4.5 million tons of waste plastics from automobiles), and the annual production of steel slag powder is also enormous. These types of waste not only occupy a large amount of land resources, but also easily cause soil, water, and air pollution through seepage and dust, seriously restricting the sustainable development of the ecological environment. Therefore, the resource utilization of the above three types of waste has become a major issue that urgently needs to be addressed.

[0003] At the same time, the fiberglass slatted flooring widely used in the aquaculture industry has significant environmental defects: the material is difficult to recycle and degrade after use, and cannot be incinerated, which can easily cause secondary pollution; in addition, the traditional dry pond and artificial wetland models in sewage collection and treatment have problems such as large land occupation area and long construction period, and there is an urgent need to replace engineering solutions with facility and equipment solutions.

[0004] In summary, existing technologies face the dilemma of low resource utilization rates of bulk waste, as well as environmental shortcomings in materials and facilities related to aquaculture and wastewater treatment. Developing an environmentally friendly material and related equipment that can realize waste resource utilization and replace fiberglass would have both environmental benefits and practical value, and thus has significant practical significance and promising prospects for promotion. Summary of the Invention

[0005] This application discloses an environmentally friendly material made from waste plastic phosphogypsum steel slag, its preparation method, and its application, in order to solve the aforementioned technical problems in the prior art.

[0006] To solve the above problems, this application adopts the following technical solution:

[0007] In a first aspect, this application provides an environmentally friendly material made from waste plastic phosphogypsum steel slag, comprising the following raw materials in parts by weight:

[0008] 40-70 portions of waste plastic;

[0009] 30-40 parts phosphogypsum;

[0010] 15-30 parts steel slag powder;

[0011] 5-10 parts modifier.

[0012] Secondly, this application provides a method for preparing environmentally friendly materials from waste plastic phosphogypsum steel slag, characterized by comprising the following steps:

[0013] Waste plastics, hemihydrate phosphogypsum, steel slag powder, and modifier are mixed evenly according to the formula to obtain a mixture.

[0014] The mixture of materials is melt-blended to obtain a blended material;

[0015] The blended material is transferred to a hot pressing casting mold and hot-pressed into shape.

[0016] The blended material is cooled and shaped in a mold. Once the mold has cooled, it is demolded to obtain the finished environmentally friendly material.

[0017] Thirdly, this application provides the above-mentioned waste plastic phosphogypsum steel slag environmental protection material, or the above-mentioned waste plastic phosphogypsum steel slag environmental protection material, for use in the preparation of manure slatted floors, sewage storage tanks, or micro-wetland basins.

[0018] The technical solution adopted in this application can achieve the following beneficial effects:

[0019] The environmentally friendly waste plastic phosphogypsum and steel slag material provided in this application uses waste automotive plastics as the main matrix. It not only consumes large quantities of this difficult-to-treat waste but also utilizes its own toughness to prevent brittleness and enhance its deformation capacity, while reducing overall weight. The phosphogypsum and steel slag powders, two industrial wastes, are used in a mixture of needle-like fragments and irregular flakes, while the steel slag powder is filled in an irregular, multi-faceted granular form, creating a stable supporting structure that significantly improves the material's hardness and tensile strength, solving the problem of insufficient rigidity in pure plastics. The modifier acts as a "bonding and coordinating" agent, allowing the organic plastics and inorganic phosphogypsum and steel slag powder to mix evenly and bind tightly, preventing delamination and peeling during use, and improving the material's aging resistance and extending its service life. These four raw materials work together to efficiently absorb three types of bulk pollutants, and through the combination of a flexible matrix and rigid fillers, the material possesses good toughness, high strength, and durability, perfectly suited for use in livestock farming and wastewater treatment scenarios such as slatted floors and sewage storage tanks. It not only replaces environmentally unfriendly fiberglass materials but also turns waste into treasure, taking into account environmental benefits, performance, and cost advantages, providing a practical solution for the equipment-based upgrading of related facilities. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Example 1:

[0022] 1.1 Raw materials, comprising the following parts by weight:

[0023] 55 pieces of waste plastic (including: 15 pieces of waste plastic fuel tank sheets from automobiles; 25 pieces of waste plastic bumper sheets from automobiles; and 15 pieces of waste plastic intake pipe sheets from automobile engines).

[0024] 35 parts phosphogypsum;

[0025] Steel slag powder (specific surface area 350m²) 2 25 portions ( / kg);

[0026] 8 parts of modifier (including: 3 parts of light stabilizer 944, 1 part of auxiliary oxidant 168, 1 part of main antioxidant 1010, and 3 parts of 4-carbon POE).

[0027] 1.2 Preparation method, including the following steps:

[0028] S1, Raw material pretreatment

[0029] Steel slag powder is ground to a finer density of 40 mesh or higher.

[0030] The phosphogypsum is dried until the free moisture content is less than 3% by mass, and then ground into powder with a fineness of 60 mesh or higher.

[0031] The waste plastic is waste plastic sheet material, which is processed to be less than 10mm in size;

[0032] The modifier is dried until the free moisture content is less than 3% by mass, and then ground into powder with a fineness of 60 mesh or higher.

[0033] S2, Mix

[0034] According to the formula, waste plastics, hemihydrate phosphogypsum, steel slag powder and modifier are stirred at a stirring speed of 10-20 r / min for 10-15 min to obtain a mixture.

[0035] S3, melt blending

[0036] The mixture was transferred to an internal mixer for melt blending to obtain a blended material; the mixing temperature was 200℃ and the mixing time was 20 minutes.

[0037] S4, Hot pressing

[0038] The blended material is transferred to a hot-press casting mold and hot-pressed at a nominal force of 1500 tons and a plasticizing temperature of 250°C.

[0039] S5, Cooling and Shaping

[0040] The blended material is cooled and shaped in a mold. After molding, the mold is cooled to 50°C, and the environmentally friendly material is obtained by demolding.

[0041] Example 2:

[0042] The difference between this embodiment and Embodiment 1 is that:

[0043] 2.1 Raw materials, comprising the following parts by weight:

[0044] 40 pieces of waste plastic (including: 10 pieces of waste plastic fuel tank sheets from automobiles; 20 pieces of waste plastic bumper sheets from automobiles; and 10 pieces of waste plastic intake pipe sheets from automobile engines).

[0045] 40 parts phosphogypsum;

[0046] Steel slag powder (specific surface area 300m²) 2 15 portions ( / kg);

[0047] 5 parts of modifier (including: 1 part of UV absorber UV-326, 1 part of auxiliary oxidant 168, 1 part of main antioxidant 1010, and 2 parts of di(2-ethylhexyl) phthalate (DEHP).

[0048] The preparation method is the same as in Example 1, and the environmentally friendly material product is obtained.

[0049] Example 3:

[0050] The difference between this embodiment and Embodiment 1 is that:

[0051] 3.1 Raw materials, including the following parts by weight:

[0052] 70 pieces of waste plastic (including: 20 pieces of waste plastic fuel tank sheets from automobiles; 30 pieces of waste plastic bumper sheets from automobiles; and 20 pieces of waste plastic intake pipe sheets from automobile engines).

[0053] 30 parts phosphogypsum;

[0054] Steel slag powder (specific surface area 400m²) 2 30 portions ( / kg);

[0055] 10 parts of modifier (including: 3 parts of UV absorber UV-326, 2 parts of auxiliary oxidant 168, 2 parts of main antioxidant 1010, and 3 parts of di(2-ethylhexyl) phthalate (DEHP).

[0056] The preparation method is the same as in Example 1, and the environmentally friendly material product is obtained.

[0057] Example 4:

[0058] 4.1 Raw materials, comprising the following parts by weight:

[0059] The difference between this embodiment and Embodiment 1 is that:

[0060] 55 pieces of waste plastic (including: 15 pieces of waste plastic fuel tank sheets from automobiles; 25 pieces of waste plastic bumper sheets from automobiles; and 15 pieces of waste plastic intake pipe sheets from automobile engines).

[0061] 35 parts phosphogypsum;

[0062] 25 parts of steel slag powder;

[0063] 8 parts of modifier (including 8 parts of light stabilizer 944).

[0064] The preparation method is the same as in Example 1, and the environmentally friendly material product is obtained.

[0065] Example 5:

[0066] 5.1 Raw materials, comprising the following parts by weight:

[0067] The difference between this embodiment and Embodiment 1 is that:

[0068] 55 pieces of waste plastic (including: 15 pieces of waste plastic fuel tank sheets from automobiles; 25 pieces of waste plastic bumper sheets from automobiles; and 15 pieces of waste plastic intake pipe sheets from automobile engines).

[0069] 35 parts phosphogypsum;

[0070] 25 parts of steel slag powder;

[0071] 8 parts of modifier (including 8 parts of 4-carbon POE).

[0072] The preparation method is the same as in Example 1, and the environmentally friendly material product is obtained.

[0073] Example 6:

[0074] The difference between this embodiment and embodiment 1 is that in step S3, melt blending: the mixture is transferred to a plastic screw extruder for melt blending, and the extrusion temperature is 200°C to obtain the blended material;

[0075] The rest is the same as in Example 1, and an environmentally friendly material product is obtained.

[0076] Example 7:

[0077] The difference between this embodiment and Embodiment 1 is that in step S3, melt blending: the mixture is transferred to an internal mixer for melt blending at a temperature of 180°C for 30 minutes to obtain the blended material;

[0078] In step S4, hot pressing is performed by transferring the blended material into a hot pressing casting mold and hot pressing it at a nominal force of 1000 tons and a plasticizing temperature of 300°C.

[0079] The rest is the same as in Example 1, and an environmentally friendly material product is obtained.

[0080] Example 8:

[0081] The difference between this embodiment and embodiment 1 is that in step S3, melt blending: the mixture is transferred to an internal mixer for melt blending, the mixing temperature is 220°C, and the mixing time is 10 minutes to obtain the blended material;

[0082] In step S4, hot pressing is performed: the blended material is transferred to a hot pressing casting mold and hot-pressed at a nominal force of 2000 tons and a plasticizing temperature of 200°C.

[0083] The rest is the same as in Example 1, and an environmentally friendly material product is obtained.

[0084] II. Experimental Examples

[0085] 1. The environmentally friendly materials prepared in Examples 1-8 were subjected to the following performance tests according to the following standards:

[0086] According to GB / T19466.6-2009, the oxidation induction time was determined;

[0087] According to GB / T9341-2008, bending performance test;

[0088] According to GB / T1040.1-2018, tensile properties of plastics are tested;

[0089] According to GB / T8806-2008, performance testing of plastic parts;

[0090] According to GB / T19472.2-2017, the performance test of buried polyethylene structural wall pipes includes testing ring flexibility.

[0091] Table 1 Test Results

[0092] Oxidation induction time, minutes Elastic modulus, MPa Tensile strength, MPa Elongation at break Ring flexible Example 1 92 423 12 320% Deformation of 30% or more without damage Example 2 80 400 8 300% Deformation of 30% or more without damage Example 3 90 421 11 318% Deformation of 30% or more without damage Example 4 91 422 11 320% Deformation of 30% or more without damage Example 5 88 415 10.5 314% Deformation of 30% or more without damage Example 6 92 420 11 320% Deformation of 30% or more without damage Example 7 91 421 11.4 317% Deformation of 30% or more without damage Example 8 92 422 12 318% Deformation of 30% or more without damage

[0093] As shown in Table 1, the environmentally friendly materials prepared in Examples 1-8 of this application have an oxidation induction time of ≥80 minutes, an elastic modulus of ≥400MPa, a tensile strength of ≥8MPa, an elongation at break of ≥300%, and a deformation of ≥30% without damage. The environmentally friendly materials prepared in Examples 1-8 of this application, through the combination of "flexible matrix + rigid filler", give the materials the characteristics of good toughness, sufficient strength and durability, and can be well adapted to the use needs of aquaculture and sewage treatment scenarios such as slatted floor and sewage storage tank.

[0094] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. An environmentally friendly material made from waste plastic phosphogypsum steel slag, characterized in that, The raw materials include the following parts by weight: 40-70 portions of waste plastic; 30-40 parts phosphogypsum; 15-30 parts steel slag powder; 5-10 parts modifier.

2. The environmentally friendly material made from waste plastic phosphogypsum and steel slag according to claim 1, characterized in that, The weight parts of each raw material are as follows: 45-60 portions of waste plastic; 35-40 parts phosphogypsum; 15-20 parts steel slag powder; 5-8 parts modifier.

3. The environmentally friendly material made from waste plastic phosphogypsum and steel slag according to claim 1 or 2, characterized in that, The waste plastic comprises the following raw materials in parts by weight: 10-20 portions of waste plastic fuel tank sheets from automobiles; 20-30 portions of scrap plastic bumper material from automobiles; 10-20 parts of waste engine plastic intake pipe sheet material.

4. The environmentally friendly material made from waste plastic phosphogypsum and steel slag according to claim 1 or 2, characterized in that, The waste plastic comprises the following raw materials in parts by weight: 12-18 portions of waste automotive plastic fuel tank sheets; 22-28 portions of waste plastic bumper material from automobiles; 12-18 parts of waste engine plastic intake pipe sheet material.

5. The environmentally friendly material made from waste plastic phosphogypsum and steel slag according to claim 1, characterized in that, The modifier includes at least one of an anti-aging agent, an antioxidant, and a plasticizer. The anti-aging agent is UV-326, an anti-ultraviolet absorber, or light stabilizer 944. The antioxidant includes an auxiliary antioxidant 168 and a primary antioxidant 1010. The plasticizer is 4-carbon POE or di(2-ethyl ethyl) phthalate. And / or, the phosphogypsum is hemihydrate phosphogypsum.

6. The method for preparing environmentally friendly waste plastic phosphogypsum steel slag material according to any one of claims 1-5, characterized in that, Includes the following steps: Waste plastics, hemihydrate phosphogypsum, steel slag powder, and modifier are mixed evenly according to the formula to obtain a mixture. The mixture of materials is melt-blended to obtain a blended material; The blended material is transferred to a hot pressing casting mold and hot-pressed into shape. The blended material is cooled and shaped in a mold. Once the mold has cooled, it is demolded to obtain the finished environmentally friendly material.

7. The method for preparing the environmentally friendly material from waste plastic phosphogypsum and steel slag according to claim 6, characterized in that, The melt blending is carried out by passing the mixture through an internal mixer or a plastic screw extruder; When using an internal mixer, the mixing temperature is 180–220℃ and the mixing time is 10–30 minutes; When using a screw extruder, the extrusion temperature is 180–220°C.

8. The method for preparing the environmentally friendly material from waste plastic phosphogypsum and steel slag according to claim 6, characterized in that, The hot pressing process involves transferring the blended material into a hot pressing casting mold and hot pressing it at a nominal force of 1000-2000 tons and a plasticizing temperature of 200-300°C. And / or, the cooling and shaping refers to cooling the mold to 40-60°C after molding, and then demolding to obtain the finished environmentally friendly material.

9. The method for preparing the environmentally friendly material from waste plastic phosphogypsum and steel slag according to claim 6, characterized in that, Before mixing the raw materials, the process also includes pretreatment of the raw materials, including: Steel slag powder is ground to a finer density of 40 mesh or higher. The phosphogypsum is dried until the free moisture content is less than 3% by mass, and then ground into powder with a fineness of 60 mesh or higher. The waste plastic is waste plastic sheet material, which is processed to be less than 10mm in size; The modifier is dried until the free moisture content is less than 3% by mass, and then ground into powder with a fineness of 60 mesh or higher.

10. The application of the waste plastic phosphogypsum steel slag environmental protection material as described in any one of claims 1-5 or any one of claims 1-9 in the preparation of slatted flooring, sewage storage tanks or micro-wetland basins.