CN108239323B - Method for filling phosphogypsum and red mud into PE drain pipe - Google Patents
Method for filling phosphogypsum and red mud into PE drain pipe Download PDFInfo
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- CN108239323B CN108239323B CN201711235560.5A CN201711235560A CN108239323B CN 108239323 B CN108239323 B CN 108239323B CN 201711235560 A CN201711235560 A CN 201711235560A CN 108239323 B CN108239323 B CN 108239323B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Abstract
The invention discloses a method for filling a PE drain pipe with phosphogypsum and red mud, which is characterized by comprising the following steps: the method takes waste-phosphogypsum and red mud as raw materials and comprises the following steps: (1) dehydrating, drying and crushing the phosphogypsum, and adding an aluminate coupling agent, stearic acid and a phase solvent to obtain activated phosphogypsum; (2) dehydrating, drying and crushing the red mud, and adding an aluminate coupling agent, stearic acid and a phase solvent to obtain activated red mud; (3) mixing activated phosphogypsum, activated red mud and PE base material me according to a certain proportion, and extruding to obtain master batches; (4) performing performance test on the master batch in the step (3); (5) mixing the master batch, the PE raw material, the color master batch and the foam remover in the step (4), and then extruding the mixture; (6) carrying out pipe molding on the extrusion in the step (5) by using a molding model; (7) and (6) detecting. The invention is economical, feasible, efficient, high-quality, practical, environment-friendly and simple and convenient to operate, and is suitable for popularization and application of the phosphogypsum and red mud filled PE drain pipe.
Description
Technical Field
The invention belongs to the technical field of pipeline filling, and particularly relates to a method for filling a PE drain pipe with phosphogypsum and red mud.
Background
Phosphogypsum and red mud are common substances in production and harmful substances. The phosphogypsum is solid waste discharged in the process of producing phosphate fertilizer and phosphoric acid, and has the following characteristics: the phosphogypsum is a powdery material and almost has no plasticity; phosphoric acid, sulphuric acid and hydrofluoric acid remain in phosphogypsum, which is an acidic by-product (pH < 3). At present, the effective utilization rate of the Chinese phosphogypsum is low, a great amount of phosphogypsum is stacked as solid waste residue, the stacked phosphogypsum not only occupies a large amount of land, but also pollutes the environment by harmful heavy metal chemical substances such as arsenic, cadmium, mercury and the like contained in the phosphogypsum.
Red mud is a large amount of waste discharged in the production process of alumina, and is red due to the iron oxide, so the red mud is called as red mud; the pH value and the salt content are high, and the environment is affected. The red mud stacking not only occupies a large amount of land, but also has higher stacking and damming cost, and alkali in the red mud is easy to permeate to cause pollution of underground water and soil, thereby damaging an ecosystem.
Phosphogypsum and red mud are mostly low-molecular compounds, are poor in compatibility with a PE matrix and are not well dispersed, and are agglomerated into large particles, so that the surface performance of a product is reduced, the mechanical property of the material is reduced, the production cost, the process difficulty and the manufacturing efficiency are influenced to a great extent, and the surface quality and the processability of the product cannot be ensured.
Disclosure of Invention
The invention aims to overcome the defects and provides the method for filling the PE drain pipe with the phosphogypsum and the red mud, which is economical, feasible, efficient, high-quality, practical, environment-friendly and simple and convenient to operate.
The purpose of the invention and the main technical problem of solving the invention are realized by adopting the following technical scheme:
the invention relates to a method for filling a PE drain pipe with phosphogypsum and red mud, which comprises the following steps: the method comprises the following steps of taking waste phosphogypsum and red mud as raw materials, respectively carrying out activation treatment on the phosphogypsum and the red mud, and carrying out low-speed mixing and extrusion molding on a product subjected to activation treatment and a PE base material, wherein the specific steps are as follows:
(1) dehydrating and drying phosphogypsum until the water content is below 3 percent, crushing phosphogypsum particles to particle size of below 0.8 cm by using a crusher, grinding the particles into particles of 80-400 meshes by using a grinder, adding an aluminate coupling agent accounting for 2 percent of the mass of the particles, stearic acid accounting for 2 percent of the mass of the particles and a phase solvent accounting for 3 percent of the mass of the particles, and drying and activating the particles at 120 ℃ for 15-20 minutes to obtain activated phosphogypsum;
(2) dehydrating and drying red mud until the water content is below 3 percent, crushing the red mud particles into particles with the particle size of below 0.8 cm by a crusher, grinding the particles into particles with the particle size of 80-400 meshes by a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a compatilizer with the particle mass of 3 percent, and drying and activating the particles for 15-20 minutes at the temperature of 102-105 ℃ to obtain activated red mud;
(3) weighing 35-45% of activated phosphogypsum, 35-45% of activated red mud and 15-25% of PE base material, mixing at a low speed of 80-120 r/min for 0.5 h, and extruding master batches with the particle size of 0.1-0.3 cm;
(4) performing dispersion performance and plastic grafting rate performance tests on the master batch in the step (3) to ensure that the dispersion reaches 90 percent and the grafting rate is not less than 2 percent, and repeating the steps (1) to (3) if the requirements cannot be met;
(5) weighing 22-32% of the master batch qualified in the step (4), 60-70% of PE raw material, 3-7% of color master batch and 1-5% of foam cleaning agent by mass percent, mixing at a low speed of 15-25 rpm at 25 ℃ for 0.5 hour, and extruding the mixture;
(6) forming the mixture obtained in the step (5) into a pipe by using a forming model and a water cooling or air cooling method under a vacuum condition;
(7) and (4) performing ring stiffness, ring flexibility and drop hammer impact detection on the formed pipe in the step (6), if the ring stiffness is larger than or equal to 8, the pipe diameter in the ring flexibility is not larger than 30% of deformation, the pipe is not cracked and layered, the pipe is a qualified part, warehousing qualified products, if the pipe is not qualified, crushing the pipe, and then repeating the steps (5) to (7).
The method for filling the phosphogypsum and red mud into the PE drain pipe comprises the following steps: and (4) extruding the master batch by using a single-screw extruder in the step (3).
The method for filling the phosphogypsum and red mud into the PE drain pipe comprises the following steps: and (5) extruding the mixture by using a double-screw extruder.
Compared with the prior art, the invention has obvious advantages and beneficial effects. According to the technical scheme, the method for filling the PE drain pipe with the phosphogypsum and the red mud has the advantages that the acidic phosphogypsum and the alkaline red mud are optimally compounded and blended, so that the added mixed powder is neutral, the corrosivity of the waste residue on a substrate and equipment is reduced and even removed, and the pollution-free treatment of the industrial waste residue phosphogypsum and the red mud is effectively realized; the method utilizes the regulation and control technology of the aggregation state structure of the acidic phosphogypsum, the alkaline red mud and the PE composite modified material, and integrates the technologies such as formula combination, reaction blending and the like, so that the microscopic aggregation state structure of the polyolefin material is controllable, and the macroscopic performance of the material is adjustable. In a word, the invention is economical, feasible, efficient, high-quality, practical, environment-friendly and simple and convenient to operate, and is suitable for popularization and application of the phosphogypsum and red mud filled PE drain pipe.
Detailed Description
The following detailed description will be made on the specific implementation of the method for filling the PE drainage pipe with phosphogypsum and red mud according to the present invention with reference to the preferred embodiments. Non-viable cells
Example 1:
the method comprises the following steps of taking waste phosphogypsum and red mud as raw materials, respectively carrying out activation treatment on the phosphogypsum and the red mud, and carrying out low-speed mixing and extrusion molding on a product subjected to activation treatment and a PE base material, wherein the specific steps are as follows:
(1) dehydrating and drying phosphogypsum until the water content is below 3 percent, crushing phosphogypsum particles into particles with the particle size of below 0.8 cm by using a crusher, grinding the particles into particles with the particle size of 80 meshes by using a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a phase solvent with the particle mass of 3 percent, and drying and activating the particles for 15 minutes at 120 ℃ to obtain activated phosphogypsum;
(2) dehydrating and drying red mud until the water content is below 3 percent, crushing red mud particles into particles with the particle size of below 0.8 cm by a crusher, grinding the particles into particles with the particle size of 80 meshes by a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a compatilizer with the particle mass of 3 percent, and drying and activating the particles for 15 minutes at the temperature of 102 ℃ to obtain activated red mud;
(3) weighing 35% of activated phosphogypsum, 45% of activated red mud and 20% of PE base material by mass percent, mixing at a low speed of 80 r/min for 0.5 h, and extruding master batches with the particle size of 0.1 cm;
(4) performing dispersion performance and plastic grafting rate performance tests on the master batch in the step (3) to ensure that the dispersion reaches 90 percent and the grafting rate is not less than 2 percent, and repeating the steps (1) to (3) if the requirements cannot be met;
(5) weighing 22% of the master batch qualified in the step (4), 66% of the PE raw material, 7% of the master batch and 5% of the foam cleaning agent by mass, mixing at a low speed of 15 rpm at 25 ℃ for 0.5 hour, and extruding the mixture;
(6) forming the mixture obtained in the step (5) into a pipe by using a forming model and a water cooling or air cooling method under a vacuum condition;
(7) and (4) performing ring stiffness, ring flexibility and drop hammer impact detection on the formed pipe in the step (6), if the ring stiffness is larger than or equal to 8, the pipe diameter in the ring flexibility is not larger than 30% of deformation, the pipe is not cracked and layered, the pipe is a qualified part, warehousing qualified products, if the pipe is not qualified, crushing the pipe, and then repeating the steps (5) to (7).
Example 2:
the method comprises the following steps of taking waste phosphogypsum and red mud as raw materials, respectively carrying out activation treatment on the phosphogypsum and the red mud, and carrying out low-speed mixing and extrusion molding on a product subjected to activation treatment and a PE base material, wherein the specific steps are as follows:
(1) dehydrating and drying phosphogypsum until the water content is below 3 percent, crushing phosphogypsum particles into particles with the particle size of below 0.8 cm by using a crusher, grinding the particles into particles with the particle size of 240 meshes by using a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a phase solvent with the particle mass of 3 percent, and drying and activating the particles for 17 minutes at 120 ℃ to obtain activated phosphogypsum;
(2) dehydrating and drying red mud until the water content is below 3 percent, crushing red mud particles into particles with the particle size of below 0.8 cm by a crusher, grinding the particles into particles of 240 meshes by a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a compatilizer with the particle mass of 3 percent, and drying and activating the particles at 104 ℃ for 17 minutes to obtain activated red mud;
(3) weighing 45% of activated phosphogypsum, 40% of activated red mud and 15% of PE base material by mass percent, mixing at a low speed of 100 revolutions per minute for 0.5 hours, and then extruding master batches with the particle size of 0.2 cm;
(4) performing dispersion performance and plastic grafting rate performance tests on the master batch in the step (3) to ensure that the dispersion reaches 90 percent and the grafting rate is not less than 2 percent, and repeating the steps (1) to (3) if the requirements cannot be met;
(5) weighing 27% of the qualified master batch detected in the step (4), 65% of PE raw material, 5% of master batch and 3% of foam cleaning agent by mass percent, mixing at a low speed of 20 rpm at 25 ℃ for 0.5 hour, and extruding the mixture;
(6) forming the mixture obtained in the step (5) into a pipe by using a forming model and a water cooling or air cooling method under a vacuum condition;
(7) and (4) performing ring stiffness, ring flexibility and drop hammer impact detection on the formed pipe in the step (6), if the ring stiffness is larger than or equal to 8, the pipe diameter in the ring flexibility is not larger than 30% of deformation, the pipe is not cracked and layered, the pipe is a qualified part, warehousing qualified products, if the pipe is not qualified, crushing the pipe, and then repeating the steps (5) to (7).
Example 3:
the method comprises the following steps of taking waste phosphogypsum and red mud as raw materials, respectively carrying out activation treatment on the phosphogypsum and the red mud, and carrying out low-speed mixing and extrusion molding on a product subjected to activation treatment and a PE base material, wherein the specific steps are as follows:
(1) dehydrating and drying phosphogypsum until the water content is below 3 percent, crushing phosphogypsum particles to particle size of below 0.8 cm by using a crusher, grinding the particles into particles of 400 meshes by using a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a phase solvent with the particle mass of 3 percent, and drying and activating the particles at 120 ℃ for 20 minutes to obtain activated phosphogypsum;
(2) dehydrating and drying red mud until the water content is below 3 percent, crushing red mud particles into particles with the particle size of below 0.8 cm by a crusher, grinding the particles into particles with the particle size of 400 meshes by a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a compatilizer with the particle mass of 3 percent, and drying and activating the particles at 105 ℃ for 20 minutes to obtain activated red mud;
(3) weighing 40% of activated phosphogypsum, 35% of activated red mud and 25% of PE base material by mass percent, mixing at a low speed of 120 r/min for 0.5 h, and extruding master batches with the particle size of 0.3 cm;
(4) performing dispersion performance and plastic grafting rate performance tests on the master batch in the step (3) to ensure that the dispersion reaches 90 percent and the grafting rate is not less than 2 percent, and repeating the steps (1) to (3) if the requirements cannot be met;
(5) weighing 32% of the qualified master batch detected in the step (4), 60% of PE raw material, 7% of master batch and 1% of foam cleaning agent by mass percent, mixing at a low speed of 25 rpm at 25 ℃, mixing for 0.5 hour, and extruding the mixture;
(6) forming the mixture obtained in the step (5) into a pipe by using a forming model and a water cooling or air cooling method under a vacuum condition;
(7) and (4) performing ring stiffness, ring flexibility and drop hammer impact detection on the formed pipe in the step (6), if the ring stiffness is larger than or equal to 8, the pipe diameter in the ring flexibility is not larger than 30% of deformation, the pipe is not cracked and layered, the pipe is a qualified part, warehousing qualified products, if the pipe is not qualified, crushing the pipe, and then repeating the steps (5) to (7).
And (4) extruding the master batch by using a single-screw extruder in the step (3). And (5) extruding the mixture by using a double-screw extruder.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.
Claims (3)
1. A method for filling a PE drain pipe with phosphogypsum and red mud is characterized by comprising the following steps: the method comprises the following steps of taking waste phosphogypsum and red mud as raw materials, respectively carrying out activation treatment on the phosphogypsum and the red mud, and carrying out low-speed mixing and extrusion molding on a product subjected to activation treatment and a PE base material, wherein the specific steps are as follows:
(1) dehydrating and drying phosphogypsum until the water content is below 3 percent, crushing phosphogypsum particles to particle size of below 0.8 cm by using a crusher, grinding the particles into particles of 80-400 meshes by using a grinder, adding an aluminate coupling agent accounting for 2 percent of the mass of the particles, stearic acid accounting for 2 percent of the mass of the particles and a phase solvent accounting for 3 percent of the mass of the particles, and drying and activating the particles at 120 ℃ for 15-20 minutes to obtain activated phosphogypsum;
(2) dehydrating and drying red mud until the water content is below 3 percent, crushing the red mud particles into particles with the particle size of below 0.8 cm by a crusher, grinding the particles into particles with the particle size of 80-400 meshes by a grinding machine, adding an aluminate coupling agent with the particle mass of 2 percent, stearic acid with the particle mass of 2 percent and a compatilizer with the particle mass of 3 percent, and drying and activating the particles for 15-20 minutes at the temperature of 102-105 ℃ to obtain activated red mud;
(3) weighing 35-45% of activated phosphogypsum, 35-45% of activated red mud and 15-25% of PE base material, mixing at a low speed of 80-120 r/min for 0.5 h, and extruding master batches with the particle size of 0.1-0.3 cm;
(4) performing dispersion performance and plastic grafting rate performance tests on the master batch in the step (3) to ensure that the dispersion reaches 90 percent and the grafting rate is not less than 2 percent, and repeating the steps (1) to (3) if the requirements cannot be met;
(5) weighing 22-32% of the master batch qualified in the step (4), 60-70% of PE raw material, 3-7% of color master batch and 1-5% of foam cleaning agent by mass percent, mixing at a low speed of 15-25 rpm at 25 ℃ for 0.5 hour, and extruding the mixture;
(6) forming the mixture obtained in the step (5) into a pipe by using a forming model and a water cooling or air cooling method under a vacuum condition;
(7) and (4) performing ring stiffness, ring flexibility and drop hammer impact detection on the formed pipe in the step (6), if the ring stiffness is larger than or equal to 8, the pipe diameter in the ring flexibility is not larger than 30% of deformation, the pipe is not cracked and layered, the pipe is a qualified part, warehousing qualified products, if the pipe is not qualified, crushing the pipe, and then repeating the steps (5) to (7).
2. The method for filling the PE drainage pipe with the phosphogypsum and the red mud according to claim 1, which is characterized in that: and (4) extruding the master batch by using a single-screw extruder in the step (3).
3. The method for filling the PE drainage pipe with the phosphogypsum and the red mud according to claim 1, which is characterized in that: and (5) extruding the mixture by using a double-screw extruder.
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| CN108239323B true CN108239323B (en) | 2020-09-08 |
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| CN109021358A (en) * | 2018-07-26 | 2018-12-18 | 徐州辛辛那提新型材料有限公司 | A kind of preparation process of the high tenacity PE hollow spiral tube modified based on red mud |
| CN111777844A (en) * | 2020-07-21 | 2020-10-16 | 贵州大学 | Biodegradable polyester polymer/red mud composite material with high filling and low cost and controllable biodegradation and preparation method thereof |
| CN114106441B (en) * | 2021-11-17 | 2022-07-19 | 四川大学 | Method for preparing regenerated product by using waste phosphogypsum and waste crosslinked polyethylene |
| CN114716749A (en) * | 2022-03-23 | 2022-07-08 | 贵阳伟佳塑料有限公司 | Preparation method of plastic drain pipe filled with electrolytic manganese residues |
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| CN101264480A (en) * | 2008-04-25 | 2008-09-17 | 贵州平坝宏大铝化工有限公司 | Harm reduction processing method for phosphogypsum and red mud |
| CN101624457B (en) * | 2008-07-09 | 2011-07-27 | 北京理工大学 | Environmental protection based red mud combination modification synergism fire-retardant polyethylene |
| CN101768290B (en) * | 2010-01-25 | 2011-12-07 | 西南科技大学 | Modified phosphorous slag used as plastic filler and preparation method thereof |
| CN102070815A (en) * | 2010-12-15 | 2011-05-25 | 北京理工大学 | Dealkalized red mud-containing flame-retardant polyvinyl plastic and preparation method thereof |
| CN106117746B (en) * | 2016-07-27 | 2018-07-17 | 联塑科技发展(贵阳)有限公司 | A kind of high density polyethylene (HDPE) plasticizing mother particle and preparation method thereof and its application in hdpe pipe |
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Effective date of registration: 20220331 Address after: 550000 shawen town Sifang Po village, Baiyun District, Guiyang City, Guizhou Province Patentee after: GUIYANG WEIJIA PLASTICS Co.,Ltd. Address before: 550000 Baisha Road, Baiyun District, Guiyang City, Guizhou Province (in Yanshanhong Town Industrial Park) Patentee before: GUIYANG XINGSU TECHNOLOGY CO.,LTD. |