CN115558217A - PVC pipe containing modified semi-hydrated phosphogypsum powder and preparation method thereof - Google Patents
PVC pipe containing modified semi-hydrated phosphogypsum powder and preparation method thereof Download PDFInfo
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- CN115558217A CN115558217A CN202210304647.8A CN202210304647A CN115558217A CN 115558217 A CN115558217 A CN 115558217A CN 202210304647 A CN202210304647 A CN 202210304647A CN 115558217 A CN115558217 A CN 115558217A
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- phosphogypsum
- powder
- sweet wormwood
- pvc pipe
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- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 94
- 239000000843 powder Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims description 11
- 239000002994 raw material Substances 0.000 claims abstract description 55
- 235000001405 Artemisia annua Nutrition 0.000 claims abstract description 38
- 240000000011 Artemisia annua Species 0.000 claims abstract description 38
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000004806 packaging method and process Methods 0.000 claims abstract description 19
- 239000012745 toughening agent Substances 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 16
- 239000004709 Chlorinated polyethylene Substances 0.000 claims abstract description 16
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 16
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 16
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 16
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 16
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 16
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000008117 stearic acid Substances 0.000 claims abstract description 16
- 239000000292 calcium oxide Substances 0.000 claims abstract description 15
- 235000012255 calcium oxide Nutrition 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 27
- 238000004513 sizing Methods 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 22
- 238000000227 grinding Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000001354 calcination Methods 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical group [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 claims description 9
- 238000007664 blowing Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 239000012760 heat stabilizer Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 37
- 229920000915 polyvinyl chloride Polymers 0.000 description 37
- 239000007921 spray Substances 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000000643 oven drying Methods 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000002686 phosphate fertilizer Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a PVC pipe containing modified semi-hydrated phosphogypsum powder, which comprises the following components in parts by weight: PVC resin: 85-135 parts; chlorinated polyethylene: 7-15 parts; a stabilizer: 6-11 parts; bright lubricant: 2-9 parts of a solvent; toughening agent: 2-12 parts of a solvent; toner: 0.4-1.6 parts; phosphogypsum: 113-169 parts; sweet wormwood herb: 3-11 parts; stearic acid: 0.3-1.7 parts; carboxymethyl cellulose: 0.2 to 1.6 portions. The raw materials are mixed, extruded, molded and cut, and then the phosphogypsum-containing PVC pipe is obtained by cutting and packaging. According to the invention, the tensile property of the product is improved through the toughening agent, the moisture content in the phosphogypsum is reduced through the quicklime, the effect of the toughening agent is enhanced, the bonding force of the PVC resin is improved, and the tensile yield strength of the product is further enhanced.
Description
Technical Field
The invention belongs to the field of pipe production, and particularly relates to a PVC pipe containing modified semi-hydrated phosphogypsum powder and a preparation method thereof.
Background
The phosphogypsum is a solid waste for producing phosphate fertilizer and phosphoric acid, is a powdery material, has almost no plasticity, and has the main component of CaS0 4 ·2H 2 0 and Na 2 SiF 6 In addition, the phosphogypsum also contains arsenic, silver, barium, cadmium, chromium, lead, mercury, selenium and other elements, and residual phosphoric acid, sulfuric acid and hydrofluoric acid. Stacking of phosphogypsum not only occupies a large amount of land, but also causes environmental pollution, so that a reasonable utilization way of phosphogypsum is necessarily sought to realize sustainable development of phosphate fertilizer industry and high utilization of phosphogypsum.
At present, in order to improve the resource utilization of the phosphogypsum and solve the pollution problem existing in phosphogypsum stacking, the phosphogypsum is applied to the cement industry, building materials, fertilizer industry and agriculture, wherein the building materials are mostly used for producing gypsum boards and gypsum blocks. Because the phosphogypsum has the properties of poor plasticity, low hardness and the like, the weight of the product is often larger, the transportation cost is high, and the application of the phosphogypsum in the industry is greatly limited.
In order to improve the utilization rate of the phosphogypsum, the phosphogypsum is tried to be used as a raw material for producing pipes, particularly PVC pipes containing the phosphogypsum, so that the defects of the phosphogypsum can be overcome through the complementation of the performances of the raw materials, and the utilization rate of the phosphogypsum is further improved.
Although a certain achievement is already achieved in the production of PVC pipes by using phosphogypsum, in the actual production, as the phosphogypsum contains 50-60% of water, the bonding capacity of other raw materials is greatly reduced, the toughness of the pipes containing the phosphogypsum is poor, the tensile strength is not high enough, and the performance and the application of the products are influenced, the water content of the phosphogypsum needs to be reduced to be lower than 5% in order to eliminate the influence of the phosphogypsum on other raw materials, the phosphogypsum is generally calcined before use, the calcining temperature is 240-300 ℃, as part of water in the phosphogypsum is connected through molecular bonds, the connection between molecules is difficult to break at the present calcining temperature, the water content of the phosphogypsum can only be reduced to 7-9%, if the requirement is met, the calcining equipment needs to be further improved, so that the calcining temperature is not lower than 800 ℃, but not only a large amount of cost investment is required, but also the energy consumption of calcination is increased, and the enterprise benefit is reduced.
Disclosure of Invention
The invention aims to solve the problems that: provides a PVC pipe containing modified hemihydrate phosphogypsum powder and a preparation method thereof, and aims to solve the problems that the binding force among other raw materials is influenced and the tensile property of the product is reduced due to a large amount of moisture in phosphogypsum.
The technical scheme adopted by the invention is as follows:
a PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 85-135 parts of a binder; chlorinated polyethylene: 7-15 parts; a stabilizer: 6-11 parts; bright lubricant: 2-9 parts of a solvent; a toughening agent: 2-12 parts of a solvent; toner: 0.4-1.6 parts; phosphogypsum: 113-169 parts; sweet wormwood herb: 3-11 parts; stearic acid: 0.3-1.7 parts; carboxymethyl cellulose: 0.2-1.6 parts.
Preferably, the PVC pipe containing the modified phosphogypsum hemihydrate powder further comprises quicklime: 4-6 parts.
The preferable scheme of the PVC pipe containing the modified hemihydrate phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 125 parts of (a); chlorinated polyethylene: 12 parts of (1); a stabilizer: 11 parts; bright lubricant: 9 parts of (1); toner: 1 part; phosphogypsum: 155 parts of (B); stearic acid: 1.2 parts; carboxymethyl cellulose: 1.2 parts of; a toughening agent: 8 parts of a mixture; sweet wormwood herb: 10 parts.
The preferable scheme of the PVC pipe containing the modified hemihydrate phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 99 parts of a mixture; chlorinated polyethylene: 11 parts of (1); a stabilizer: 9 parts of (1); bright lubricant: 9 parts of (1); toner: 0.9 part; phosphogypsum: 135 parts of (A); stearic acid: 1.1 parts; carboxymethyl cellulose: 1.3 parts; toughening agent: 8 parts; sweet wormwood herb: 9 parts.
Furthermore, the calcium-zinc composite heat stabilizer is preferably selected as the stabilizer, is nontoxic and environment-friendly, and is suitable for pipe production.
Furthermore, the sweet wormwood is fresh sweet wormwood whole plant, and the sweet wormwood has sufficient drug effect.
A preparation method of a PVC pipe containing modified hemihydrate phosphogypsum powder comprises the following process flows:
(1) Preparing raw materials: drying sweet wormwood, grinding the sweet wormwood into 600-800 meshes of powder for later use, calcining phosphogypsum, and grinding the phosphogypsum into 1100-1300 meshes of powder for later use;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, then feeding the plasticized raw material into a spray sizing box, sleeving the plasticized raw material on the outer wall of the pipe by sizing in the spray sizing box, vacuumizing, spraying water, and then cooling and forming to obtain the pipe;
(4) Packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by planets controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Further, the preparation method of the PVC pipe containing the modified semi-hydrated phosphogypsum powder is characterized in that the extrusion temperature of the extruder is 180-210 ℃, and the extruder is a proper plasticizing temperature.
Compared with the prior art, the invention has the beneficial effects that:
(1) The water in the phosphogypsum is effectively removed by using the quick lime, a connecting bond between molecules is broken through a chemical reaction, the quick lime and water generate calcium hydroxide, the water content in the calcined phosphogypsum is reduced from 7% to less than 5%, the bonding force of PVC resin is improved, the plasticity between raw materials is enhanced, the tensile property of a product is improved, the high cost input caused by other conditions such as the improvement of the calcining temperature is avoided by using the quick lime, the process is simplified, and the enterprise benefit is increased;
(2) The toughening agent is added to solve the problem of poor plasticity of the phosphogypsum, the viscosity of the raw material is enhanced, and the influence of excessive moisture on the toughening agent is eliminated by using the quicklime;
(3) The hardness of the product is reduced by 10-20% by adding the quicklime and the flexibilizer, the brittleness is reduced, the toughness is increased, and the bearing strength is improved, so that the product is prevented from being too high in hardness and easy to crack.
Detailed Description
The present invention will be explained in detail with reference to examples below so that those skilled in the art can better understand the present invention.
The toughening agent used in the invention adopts a polyvinyl chloride toughening agent which is a plastic auxiliary agent of Chang Ping Jinkang from Dongguan city.
Example 1
A PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 130 parts of (1); chlorinated polyethylene: 13 parts; calcium-zinc composite heat stabilizer: 11 parts of (1); bright lubricant: 8 parts of a mixture; toner: 1.2 parts; phosphogypsum: 160 parts of (B); stearic acid: 1.2 parts; carboxymethyl cellulose: 1.4 parts; quicklime: 6 parts of (1); a toughening agent: 9 parts of (1); fresh sweet wormwood herb: 9 parts.
A preparation method of a PVC pipe containing modified hemihydrate phosphogypsum powder comprises the following process flows:
(1) Preparing raw materials: oven drying herba Artemisiae Annuae, grinding into 600 mesh powder, calcining ardealite, and grinding into 1100 mesh powder;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) Packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by planets controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Example 2
A PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 105 parts of (a); chlorinated polyethylene: 9 parts of (1); calcium-zinc composite heat stabilizer: 8 parts of a mixture; bright lubricant: 8 parts; toner: 0.9 part; phosphogypsum: 127 parts of (B); stearic acid: 0.9 part; carboxymethyl cellulose: 1 part; quick lime: 5 parts of a mixture; a toughening agent: 6 parts of (1); fresh sweet wormwood herb: and 7 parts.
A preparation method of a PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following process flows:
(1) Preparing raw materials: oven drying herba Artemisiae Annuae, grinding into 600 mesh powder, calcining ardealite, and grinding into 1100 mesh powder;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) And (3) packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by a planet controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Example 3
A PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 126 parts of (B); chlorinated polyethylene: 8 parts; calcium-zinc composite heat stabilizer: 6 parts of (1); bright lubricant: 3 parts of a mixture; toner: 0.5 part; phosphogypsum: 121 parts of (a); stearic acid: 0.6 part; carboxymethyl cellulose: 0.7 part; quicklime: 4 parts of a mixture; a toughening agent: 3 parts of a mixture; fresh sweet wormwood herb: 6 parts of the raw materials.
A preparation method of a PVC pipe containing modified hemihydrate phosphogypsum powder comprises the following process flows:
(1) Preparing raw materials: drying sweet wormwood, grinding the sweet wormwood into 600-mesh powder for later use, calcining phosphogypsum, and grinding the phosphogypsum into 1100-mesh powder for later use;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the raw material on the outer wall of the pipe by sizing, vacuumizing the spray sizing box, and cooling and molding the pipe after spraying water to obtain the pipe;
(4) Packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by a planet controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Example 4
A PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following components in parts by weight:
PVC resin: 95 parts of (1); chlorinated polyethylene: 10 parts of (A); calcium-zinc composite heat stabilizer: 8 parts; bright lubricant: 4 parts of a mixture; toner: 0.8 part; phosphogypsum: 155 parts of (B); stearic acid: 1.2 parts of; carboxymethyl cellulose: 1.2 parts of; quicklime: 6 parts; toughening agent: 9 parts of (1); fresh sweet wormwood: 10 parts.
A preparation method of a PVC pipe containing modified semi-hydrated phosphogypsum powder comprises the following process flows:
(1) Preparing raw materials: oven drying herba Artemisiae Annuae, grinding into 600 mesh powder, calcining ardealite, and grinding into 1100 mesh powder;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) And (3) packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by planets controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Comparative example 1
The PVC pipe is produced by the following raw materials:
PVC resin: 125 parts of (A); chlorinated polyethylene: 11 parts; calcium-zinc composite heat stabilizer: 11 parts; bright lubricant: 8 parts of a mixture; toner: 1.4 parts; phosphogypsum: 160 parts of (B); stearic acid: 1.2 parts; carboxymethyl cellulose: 1.1 parts; fresh sweet wormwood herb: 7 parts.
The production process flow is as follows:
(1) Preparing raw materials: oven drying herba Artemisiae Annuae, grinding into 600 mesh powder, calcining ardealite, and grinding into 1100 mesh powder;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) And (3) packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by a planet controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Comparative example 2
PVC resin: 130 parts of (1); chlorinated polyethylene: 13 parts; calcium-zinc composite heat stabilizer: 11 parts; bright lubricant: 8 parts; toner: 1.2 parts; phosphogypsum: 160 parts of (B); stearic acid: 1.2 parts; carboxymethyl cellulose: 1.4 parts; fresh sweet wormwood herb: 10 parts.
The production process flow is as follows:
(1) Preparing raw materials: drying sweet wormwood, grinding the sweet wormwood into 600-mesh powder for later use, calcining phosphogypsum, and grinding the phosphogypsum into 1100-mesh powder for later use;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) Packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by a planet controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
Comparative example 3
The PVC pipe is produced by the following raw materials:
PVC resin: 133 parts of (A); chlorinated polyethylene: 13 parts; calcium-zinc composite heat stabilizer: 11 parts of (1); bright lubricant: 9 parts of (1); toner: 1.1 parts; phosphogypsum: 156 parts of (a); stearic acid: 1.2 parts; carboxymethyl cellulose: 1.1 parts; fresh sweet wormwood herb: 7 parts.
The production process flow is as follows:
(1) Preparing raw materials: drying sweet wormwood, grinding the sweet wormwood into 600-mesh powder for later use, calcining phosphogypsum, and grinding the phosphogypsum into 1100-mesh powder for later use;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, keeping the temperature of the extruder at 180-210 ℃, then entering a spray sizing box, sleeving the tube with sizing on the outer wall of the tube, vacuumizing the spray sizing box, spraying water, and cooling and forming to obtain the tube;
(4) And (3) packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting the pipe by a planet controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
The physical property test of the PVC pipes produced in the above examples 1 to 4 and comparative examples 1 to 3 gave the following results:
| test items | Flat test | Pipe stiffness KPa | Tensile yield strength MPa | Vicat softening temperature DEG C | Coefficient of static friction |
| Technical requirements | Sample 9/10 passage | ≥4000 | ≥30 | ≥82 | ≤0.35 |
| Example 1 | Sample 10/10 passage | 6549 | 36 | 97 | 0.27 |
| Example 2 | Sample 10/10 passage | 7292 | 35 | 96 | 0.27 |
| Example 3 | Sample 9/10 passage | 8239 | 32 | 93 | 0.30 |
| Example 4 | Sample 10/10 passage | 7615 | 33 | 96 | 0.31 |
| Comparative example 1 | Sample 9/10 passage | 8351 | 30 | 86 | 0.35 |
| Comparative example 2 | Sample 9/10 passage | 8735 | 31 | 86 | 0.35 |
| Comparative example 3 | Sample 8/10 by | 9876 | 29 | 85 | 0.35 |
According to the test results, it can be seen that: the PVC pipe produced by the invention has better physical and mechanical properties, the tensile yield strength of the product can be enhanced by adding the quicklime and the flexibilizer into the production raw materials, the toughness and the impact resistance of the PVC pipe are improved, the rigidity is reduced, and the pipe is prevented from brittle fracture caused by overlarge rigidity, and the detection on the product obtained by the comparative ratio of 1-3 shows that the flexibilizer can further improve the tensile strength of the product, and the using effect of the flexibilizer can be enhanced by removing moisture by using the quicklime, so that when the PVC pipe is produced by using the phosphogypsum as the raw material, the flexibilizer and the quicklime are added, the moisture contained in the phosphogypsum can be effectively removed, the cohesive force between the raw materials is enhanced, the tensile strength of the product is increased, the production cost is reduced, and the economic benefit is improved.
The embodiments described above are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
Claims (10)
1. The PVC pipe containing the modified hemihydrate phosphogypsum powder is characterized by comprising the following components in parts by weight:
PVC resin: 85-135 parts of a binder; chlorinated polyethylene: 7-15 parts; a stabilizer: 6-11 parts; bright lubricant: 2-9 parts of a solvent; a toughening agent: 2-12 parts of a solvent; toner: 0.4-1.6 parts; phosphogypsum: 113-169 parts; sweet wormwood herb: 3-11 parts; stearic acid: 0.3-1.7 parts; carboxymethyl cellulose: 0.2-1.6 parts.
2. The modified PVC pipe material containing phosphogypsum hemihydrate of claim 1, further comprising quicklime: 4-6 parts.
3. The modified PVC pipe material containing phosphogypsum hemihydrate powder as claimed in claim 1, is characterized by comprising the following components in parts by weight:
PVC resin: 128 parts of; chlorinated polyethylene: 14 parts of (1); a stabilizer: 10 parts of (A); bright lubricant: 7 parts; a toughening agent: 9 parts of (1); toner: 1.5 parts; phosphogypsum: 167 parts of; sweet wormwood herb: 9 parts of (1); stearic acid: 1.3 parts; carboxymethyl cellulose: 1 part.
4. The PVC pipe containing the modified hemihydrate phosphogypsum powder as claimed in claim 1 is characterized by comprising the following components in parts by weight:
PVC resin: 97 parts of; chlorinated polyethylene: 10 parts of a binder; a stabilizer: 7 parts; bright lubricant: 8 parts; toughening agent: 8 parts of a mixture; toner: 0.9 part; phosphogypsum: 122 parts of a binder; sweet wormwood herb: 9 parts of (1); stearic acid: 1 part; carboxymethyl cellulose: 1.3 parts.
5. The PVC pipe containing the modified phosphogypsum hemihydrate powder is characterized by comprising the following components in parts by weight:
PVC resin: 125 parts of (a); chlorinated polyethylene: 12 parts of (a); a stabilizer: 11 parts; bright lubricant: 9 parts of (1); toner: 1 part; phosphogypsum: 155 parts of (B); stearic acid: 1.2 parts of; carboxymethyl cellulose: 1.2 parts; toughening agent: 8 parts of a mixture; sweet wormwood herb: 10 parts.
6. The PVC pipe containing the modified hemihydrate phosphogypsum powder as claimed in claim 1 is characterized by comprising the following components in parts by weight:
PVC resin: 99 parts of a mixture; chlorinated polyethylene: 11 parts of (1); a stabilizer: 9 parts of (1); bright lubricant: 9 parts of (1); toner: 0.9 part; phosphogypsum: 135 parts of; stearic acid: 1.1 parts; carboxymethyl cellulose: 1.3 parts; toughening agent: 8 parts; sweet wormwood herb: 9 parts.
7. The PVC pipe containing the modified hemihydrate phosphogypsum powder as claimed in claim 1 is characterized in that: the stabilizer is preferably a calcium-zinc composite heat stabilizer.
8. The PVC pipe containing the modified hemihydrate phosphogypsum powder as claimed in claim 1 is characterized in that: the herba Artemisiae Annuae is fresh herba Artemisiae Annuae whole plant.
9. A preparation method of the PVC pipe containing the modified phosphogypsum hemihydrate powder as described in any one of claims 1 to 8, is characterized by comprising the following process flows:
(1) Preparing raw materials: drying sweet wormwood, grinding the sweet wormwood into 600-800 meshes of powder for later use, calcining phosphogypsum, and grinding the phosphogypsum into 1100-1300 meshes of powder for later use;
(2) Mixing raw materials: putting the sweet wormwood herb, the phosphogypsum and other raw materials in the step (1) into a mixing system for uniform mixing, and then blowing the mixture into a dry bin;
(3) And (3) extrusion molding: plasticizing the raw material in the step (2) by an extruder head, then feeding the plasticized raw material into a spraying and sizing box, sleeving the plasticized raw material on the outer wall of the pipe by sizing in the spraying and sizing box, vacuumizing, spraying water, and then cooling and forming to obtain the pipe;
(4) Packaging: and (4) conveying the pipe obtained in the step (3) by a tractor, cutting by a planetary saw controlled by a metering device, flaring the pipe, and packaging to obtain a finished product.
10. The method for producing according to claim 9, characterized in that: the extrusion temperature of the extruder is 180-210 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210304647.8A CN115558217A (en) | 2022-03-26 | 2022-03-26 | PVC pipe containing modified semi-hydrated phosphogypsum powder and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210304647.8A CN115558217A (en) | 2022-03-26 | 2022-03-26 | PVC pipe containing modified semi-hydrated phosphogypsum powder and preparation method thereof |
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| CN115558217A true CN115558217A (en) | 2023-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210304647.8A Pending CN115558217A (en) | 2022-03-26 | 2022-03-26 | PVC pipe containing modified semi-hydrated phosphogypsum powder and preparation method thereof |
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| CN (1) | CN115558217A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105462107A (en) * | 2015-11-29 | 2016-04-06 | 贵州开磷集团股份有限公司 | Method for producing PVC (polyvinyl chloride) profile by taking alpha-semi-hydrated gypsum, beta semi-hydrated gypsum and anhydrite prepared from phosphogypsum as filler |
| CN111303562A (en) * | 2020-04-15 | 2020-06-19 | 贵州益全佳科技有限公司 | PVC pipe containing phosphogypsum and preparation method thereof |
-
2022
- 2022-03-26 CN CN202210304647.8A patent/CN115558217A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105462107A (en) * | 2015-11-29 | 2016-04-06 | 贵州开磷集团股份有限公司 | Method for producing PVC (polyvinyl chloride) profile by taking alpha-semi-hydrated gypsum, beta semi-hydrated gypsum and anhydrite prepared from phosphogypsum as filler |
| CN111303562A (en) * | 2020-04-15 | 2020-06-19 | 贵州益全佳科技有限公司 | PVC pipe containing phosphogypsum and preparation method thereof |
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Application publication date: 20230103 |