Method for preparing PE corrugated pipe by filling phosphogypsum and red mud

Abstract

The invention discloses a method for preparing a PE corrugated pipe through ardealite and red mud filling. The composite material is prepared from the following components in parts by weight: 50 to 60 parts of red mud powder, 30 to 40 parts of ardealite powder, 80 to 100 parts of a polyethylene plastic raw material, 1 to 2 parts of PE wax, 50 to 60 parts of calcium carbonate, 2 to 3 parts of paraffin, 10 to 20 parts of an anti-impact agent, 0.5 to 1 part of an antioxidant, 0.8 to 1.5 parts of a coupling agent and 1 to 1.5 parts of a color master batch. The PE corrugated pipe is prepared from the ardealite and the red mud, the prepared PE corrugated pipe enables added mixed powder to be neutral, corrosion of waste residues to a base body and equipment is reduced or even removed, and pollution-free treatment of the industrial waste residues, namely the ardealite and the red mud is effectively achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of corrugated pipes, and particularly relates to a method for preparing a PE corrugated pipe filled with phosphogypsum and red mud. Background Art

[0002] Red mud, also known as red sludge, is an industrial solid waste discharged after extracting alumina from bauxite. A large amount of red mud cannot be fully and effectively utilized, and can only be stacked in large areas, occupying a large amount of land and causing serious pollution to the environment. The generation of a large amount of red mud has had direct and indirect impacts on various aspects of human production and life. Therefore, it is urgent to minimize the production and harm of red mud and achieve resource utilization in multiple channels and large quantities. The main chemical components of red mud are SiO2, CaO, Al2O3, and Fe2O3. The particle diameter is 0.088 - 0.25 mm, the specific gravity is 2.7 - 2.9, the bulk density is 0.8 - 1.0, and the melting point is 1200 - 1250 °C. Red mud has the characteristics of a large specific surface area and contains a large number of nano- and sub-micron-sized pores. Therefore, it has natural properties such as nano-effect, thermal stability, and flame retardancy.

[0003] Phosphogypsum contains a large amount of phosphorus, fluorine, various salts, and heavy metals. If not properly treated, it will seriously harm the ecological environment such as the atmosphere, soil, and groundwater in the stacking area and its surrounding areas. Therefore, promoting the resource utilization of phosphogypsum is of great significance both socially, environmentally, and economically.

[0004] The present invention uses red mud and phosphogypsum to fill the PE corrugated pipe, which can not only improve the utilization value of phosphogypsum but also reduce environmental pollution. The red mud-modified PE corrugated pipe greatly improves the quality of the corrugated pipe. Summary of the Invention

[0005] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing a PE corrugated pipe. The preparation method is simple, and the prepared PE corrugated pipe has the advantages of high ring stiffness, light weight, strong antioxidant property, less material consumption, convenient construction and installation, good high and low temperature resistance, and environmental protection.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions: A PE corrugated pipe is composed of the following components in parts by weight: 50 - 60 parts of red mud powder, 30 - 40 parts of phosphogypsum powder, 80 - 100 parts of polyethylene plastic raw material, 1 - 2 parts of PE wax, 50 - 60 parts of calcium carbonate, 2 - 3 parts of paraffin, 10 - 20 parts of impact modifier, 0.5 - 1 part of antioxidant, 0.8 - 1.5 parts of coupling agent, and 1 - 1.5 parts of color masterbatch.

[0007] Preferably, it is composed of the following components by weight: 50 parts of red mud powder, 30 parts of phosphogypsum powder, 80 parts of polyethylene plastic raw material, 1 part of PE wax, 50 parts of calcium carbonate, 2 parts of paraffin, 10 parts of impact modifier, 0.5 part of antioxidant, 0.8 - 1.5 parts of coupling agent, and 1 part of color masterbatch.

[0008] Preferably, it is composed of the following components by weight: 60 parts of red mud powder, 40 parts of phosphogypsum powder, 100 parts of polyethylene plastic raw material, 2 parts of PE wax, 60 parts of calcium carbonate, 3 parts of paraffin, 20 parts of impact modifier, 1 part of antioxidant, 1.5 parts of coupling agent, and 1.5 parts of color masterbatch.

[0009] Preferably, it is composed of the following components by weight: 58 parts of red mud powder, 38 parts of phosphogypsum powder, 92 parts of polyethylene plastic raw material, 1.5 parts of PE wax, 56 parts of calcium carbonate, 2.5 parts of paraffin, 16 parts of impact modifier, 0.8 part of antioxidant, 1.2 parts of coupling agent, and 1.3 parts of color masterbatch.

[0010] A method for preparing PE corrugated pipe filled with phosphogypsum and red mud includes the following steps:

[0011] 1. Calcinate the phosphogypsum powder to 450 - 500 °C, then add the coupling agent, put it into a high-speed mixer for mixing, and then heat it to 90 - 105 °C for activation treatment;

[0012] 2. Put the red mud powder into a mixing kneader, control the mixing kneader at a rotation speed of 1050 revolutions per minute and a temperature of 102 - 108 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%;

[0013] 3. Conduct surface activation treatment on the red mud in step 2;

[0014] 4. Mix the activated phosphogypsum and red mud, and add polyethylene plastic raw material, PE wax, calcium carbonate, paraffin, impact modifier, antioxidant, coupling agent, and color masterbatch, and send them into a low-speed mixer for mixing, and then put them into a conical twin-screw extruder to extrude the phosphogypsum red mud composite PE corrugated pipe.

[0015] The beneficial effects of the present invention: The present invention prepares PE corrugated pipe through phosphogypsum and red mud. The prepared PE corrugated pipe makes the added mixed powder present neutral, reduces and even removes the corrosion of the waste residue to the matrix and equipment, and effectively realizes the pollution-free treatment of industrial waste residues phosphogypsum and red mud. Specific embodiments

[0016] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0017] The following technical solutions are adopted in this specific embodiment: A PE corrugated pipe is composed of the following components in parts by weight: 50-60 parts of red mud powder, 30-40 parts of phosphogypsum powder, 80-100 parts of polyethylene plastic raw material, 1-2 parts of PE wax, 50-60 parts of calcium carbonate, 2-3 parts of paraffin wax, 10-20 parts of impact modifier, 0.5-1 part of antioxidant, 0.8-1.5 parts of coupling agent, and 1-1.5 parts of color masterbatch.

[0018] A method for preparing a PE corrugated pipe filled with phosphogypsum and red mud includes the following steps:

[0019] 1. Calcinate the phosphogypsum powder to 450 to 500 °C, then add the coupling agent, put it into a high-speed mixer for mixing, and then heat it to 90 to 105 °C for activation treatment;

[0020] 2. Put the red mud powder into a mixing kneader, control the mixing kneader at a rotation speed of 1050 revolutions per minute and a temperature of 102-108 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%;

[0021] 3. Perform surface activation treatment on the red mud in step 2;

[0022] 4. Mix the activated phosphogypsum and red mud, and add polyethylene plastic raw material, PE wax, calcium carbonate, paraffin wax, impact modifier, antioxidant, coupling agent, and color masterbatch, and send them into a low-speed mixer for mixing, and then put them into a conical twin-screw extruder to extrude the phosphogypsum red mud composite PE corrugated pipe.

[0023] This specific embodiment turns waste phosphogypsum and red mud into treasures, replaces calcium carbonate and talc powder in plastic products and is applied in plastic processing, thereby reducing environmental pollution and greatly improving the utilization value of phosphogypsum and red mud. The invention is economically feasible, efficient and of high quality, practical and environmentally friendly, and easy to operate, and is suitable for the popularization and use of PE corrugated pipes filled with phosphogypsum and red mud.

[0024] Example 1: A PE corrugated pipe is composed of the following components in parts by weight: 50 parts of red mud powder, 30 parts of phosphogypsum powder, 80 parts of polyethylene plastic raw material, 1 part of PE wax, 50 parts of calcium carbonate, 2 parts of paraffin wax, 10 parts of impact modifier, 0.5 part of antioxidant, 0.8-1.5 parts of coupling agent, and 1 part of color masterbatch.

[0025] A method for preparing a PE corrugated pipe filled with phosphogypsum and red mud includes the following steps:

[0026] 1. Calcinate the phosphogypsum powder to 450 °C, then add the coupling agent, put it into a high-speed mixer for mixing, and then heat it to 90 °C for activation treatment;

[0027] 2. Put the red mud powder into a mixing kneader, control the mixing kneader at a rotation speed of 1050 revolutions per minute and a temperature of 102 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%.

[0028] 3. Conduct surface activation treatment on the red mud in step 2.

[0029] 4. Mix the activated phosphogypsum and red mud, add polyethylene plastic raw materials, PE wax, calcium carbonate, paraffin, impact resistance agent, antioxidant, coupling agent, and color masterbatch, send them into a low-speed mixer for mixing, and then put them into a conical twin-screw extruder to extrude the phosphogypsum red mud composite PE corrugated pipe.

[0030] Example 2: A PE corrugated pipe is composed of the following components in parts by weight: 60 parts of red mud powder, 40 parts of phosphogypsum powder, 100 parts of polyethylene plastic raw materials, 2 parts of PE wax, 60 parts of calcium carbonate, 3 parts of paraffin, 20 parts of impact resistance agent, 1 part of antioxidant, 1.5 parts of coupling agent, and 1.5 parts of color masterbatch.

[0031] A method for preparing a PE corrugated pipe filled with phosphogypsum and red mud includes the following steps:

[0032] 1. Calcinate the phosphogypsum powder to 480 °C, then add a coupling agent, put it into a high-speed mixer for mixing, and then heat it to 98 °C for activation treatment.

[0033] 2. Put the red mud powder into a mixing kneader, control the mixing kneader at a rotation speed of 1050 revolutions per minute and a temperature of 105 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%.

[0034] 3. Conduct surface activation treatment on the red mud in step 2.

[0035] 4. Mix the activated phosphogypsum and red mud, add polyethylene plastic raw materials, PE wax, calcium carbonate, paraffin, impact resistance agent, antioxidant, coupling agent, and color masterbatch, send them into a low-speed mixer for mixing, and then put them into a conical twin-screw extruder to extrude the phosphogypsum red mud composite PE corrugated pipe.

[0036] Example 3: A PE corrugated pipe is composed of the following components in parts by weight: 58 parts of red mud powder, 38 parts of phosphogypsum powder, 92 parts of polyethylene plastic raw materials, 1.5 parts of PE wax, 56 parts of calcium carbonate, 2.5 parts of paraffin, 16 parts of impact resistance agent, 0.8 part of antioxidant, 1.2 parts of coupling agent, and 1.3 parts of color masterbatch.

[0037] A method for preparing a PE corrugated pipe filled with phosphogypsum and red mud includes the following steps:

[0038] 1. Calcinate the phosphogypsum powder to 500 °C, then add a coupling agent, put it into a high-speed mixer for mixing, and then heat it to 105 °C for activation treatment;

[0039] 2. Put the red mud powder into a mixing kneader, control the mixing kneader at a rotation speed of 1050 revolutions per minute and a temperature of 108 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%;

[0040] 3. Conduct surface activation treatment on the red mud in step 2;

[0041] 4. Mix the activated phosphogypsum and red mud, and add polyethylene plastic raw materials, PE wax, calcium carbonate, paraffin wax, impact resistance agent, antioxidant, coupling agent, and color masterbatch into a low-speed mixer for mixing, and then put it into a conical twin-screw extruder to extrude the phosphogypsum red mud composite PE corrugated pipe.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A PE corrugated pipe, characterized in that, It consists of the following components in parts by weight: 50 - 60 parts of red mud powder, 30 - 40 parts of phosphogypsum powder, 80 - 100 parts of polyethylene plastic raw material, 1 - 2 parts of PE wax, 50 - 60 parts of calcium carbonate, 2 - 3 parts of paraffin wax, 10 - 20 parts of impact resistance agent, 0.5 - 1 part of antioxidant, 0.8 - 1.5 parts of coupling agent, and 1 - 1.5 parts of color masterbatch.

2. A PE corrugated pipe according to claim 1, characterized in that, It consists of the following components in parts by weight: 50 parts of red mud powder, 30 parts of phosphogypsum powder, 80 parts of polyethylene plastic raw material, 1 part of PE wax, 50 parts of calcium carbonate, 2 parts of paraffin wax, 10 parts of impact resistance agent, 0.5 part of antioxidant, 0.8 - 1.5 parts of coupling agent, and 1 part of color masterbatch.

3. A PE corrugated pipe according to claim 1, characterized in that, It consists of the following components in parts by weight: 60 parts of red mud powder, 40 parts of phosphogypsum powder, 100 parts of polyethylene plastic raw material, 2 parts of PE wax, 60 parts of calcium carbonate, 3 parts of paraffin wax, 20 parts of impact resistance agent, 1 part of antioxidant, 1.5 parts of coupling agent, and 1.5 parts of color masterbatch.

4. A PE corrugated pipe according to claim 1, characterized in that, It consists of the following components in parts by weight: 58 parts of red mud powder, 38 parts of phosphogypsum powder, 92 parts of polyethylene plastic raw material, 1.5 parts of PE wax, 56 parts of calcium carbonate, 2.5 parts of paraffin wax, 16 parts of impact resistance agent, 0.8 part of antioxidant, 1.2 parts of coupling agent, and 1.3 parts of color masterbatch.

5. A method for preparing PE corrugated pipes filled with phosphogypsum and red mud, characterized in that, It includes the following steps: (1) Calcinate the phosphogypsum powder to 450 to 500 °C, then add the coupling agent, put it into a high - speed mixer for mixing, and then heat it to 90 °C to 105 °C for activation treatment. (2) Put the red mud powder into a mixing and kneading machine, control the mixing and kneading machine at a rotation speed of 1050 revolutions per minute and a temperature of 102 - 108 °C for 3 minutes to control the free moisture in the red mud powder to be less than or equal to 0.25%. (3) Conduct surface activation treatment on the red mud in step (2). (4) Mix the activated phosphogypsum and red mud, and add the polyethylene plastic raw material, PE wax, calcium carbonate, paraffin wax, impact resistance agent, antioxidant, coupling agent, and color masterbatch, and send them into a low - speed mixer for mixing, and then put them into a conical twin - screw extruder to extrude the phosphogypsum - red mud composite PE corrugated pipe.