CN105348863A - Method for preparing ardealite filler for producing PVC (PVC) material - Google Patents

Method for preparing ardealite filler for producing PVC (PVC) material Download PDF

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Publication number
CN105348863A
CN105348863A CN201510845238.9A CN201510845238A CN105348863A CN 105348863 A CN105348863 A CN 105348863A CN 201510845238 A CN201510845238 A CN 201510845238A CN 105348863 A CN105348863 A CN 105348863A
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CN
China
Prior art keywords
phosphogypsum
pvc
filler
production
ardealite
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Pending
Application number
CN201510845238.9A
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Chinese (zh)
Inventor
杨永彬
杨步雷
向前勇
王伟
李泽钢
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Guizhou Kailin Group Co Ltd
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Guizhou Kailin Group Co Ltd
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Priority to CN201510845238.9A priority Critical patent/CN105348863A/en
Publication of CN105348863A publication Critical patent/CN105348863A/en
Pending legal-status Critical Current

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Abstract

The invention relates to the field of production filler for polyvinyl chloride (PVC) materials and particularly relates to a method for preparing ardealite filler for producing a PVC material. The method comprises the steps of mixing ardealite and water so as to obtain ardealite slurry, adding an alkali calcium increasing solution, which accounts for 2.5-3% the mass of the ardealite, into the ardealite slurry, then, carrying out soaking for 1-1.5 hours, then, carrying out high-temperature heating for 15-30 minutes, then, adding hydroxypropyl methylcellulose into the material so as to adjust the pH of the material to 7.0 to 7.6, then, carrying out microwave heating for 3-5 minutes, then, feeding the heated material to a layering filter tank, carrying out stirring and standing, then, removing supernatant, and baking a lower-layer material, thereby obtaining the ardealite filler. According to the method disclosed by the invention, the steps are simple, the operation is easy, the equipment requirements are low, the energy consumption and time consumption are low, the physicochemical properties of the filler are good, and the lipophilicity of the ardealite is improved, so that macromolecular substances are adsorbed to the surface of the ardealite, and then, the polarity difference between the ardealite and macromolecules is alleviated.

Description

A kind of preparation method of the phosphogypsum filler for the production of PVC material
Technical field
The present invention relates to the production filler field of pvc material, be specifically related to a kind of preparation method of the phosphogypsum filler for the production of PVC material.
Background technology
Phosphogypsum is the solid slag of Phosphate Fertilizer Industry, at present, show according to relevant statistics, the phosphogypsum total amount that China stores up has reached more than 2.5 hundred million tons, and annual newly-increased phosphogypsum quantity discharged is also more than 5,000 ten thousand tons, the rapid growth of phosphogypsum and bulk deposition, not only land occupation resource and cause environmental stress, too increase the economical load of enterprise, and the development of the national economy pressure of China.Therefore, accelerate the comprehensive utilization technique creativity of phosphogypsum, realize turning waste into wealth, turning bane into boon, having become in China's economic construction an important techno-economic policy, is also the problem in the urgent need to address of Faced In Sustainable Development.According to the gist of a document of " State Council is about the notice printing and distributing Circular Economy Development Strategy and Immediate action plan " (No. [2013] 5, promulgated by the State Council), one of resource utilization major construction projects have been listed in the comprehensive utilization of the industrial solid castoff such as phosphogypsum, flyash in, become Establishing Circular Economy Syste m in China, one of vital task of building a resource-conserving and environment-friendly society.
At present, the utilization of phosphogypsum mainly contains the following aspects: 1. make cement setting retarder; 2. Sulphuric acid salt; 3. building materials of gypsum is made; 4. make soil improvement agent etc., but its utilization ratio is only 2%-3%, resource utilization efficiency is lower.Due to phosphogypsum crystal morphology in the form of sheets, be applied to thermotolerance, resistance to impact shock, thermal conductivity and the insulativity etc. that are conducive to improving the soft section bar of polyvinyl chloride in polyvinyl chloride soft section bar filler.
In the prior art, phosphogypsum has the feature of typical laminal filler, as filler effect in the plastic mainly increment reduce costs, can also be used to improve the Young's modulus meeting system, shock strength and flexural strength etc., but phosphogypsum as the application of a kind of novel filler application in the plastic particularly in pvc material mainly because of containing plurality of impurities, the mineral acids such as the phosphoric acid of unreacted sulfuric acid and remnants and hydrofluoric acid, directly used as PVC filler, affect the stability of PVC and phosphogypsum cross-linking interface, thus detrimentally affect is brought to the processing characteristics of weighting material and the application properties of goods, and directly phosphogypsum is used as the filler of pvc material, its process for manufacturing product is complicated, cost is high, add the comprehensive utilization cost of phosphogypsum on the contrary.
Summary of the invention
The present invention for solving the problem, provide a kind of low cost, easy-operating take phosphogypsum as the method for raw material production filler.
Be achieved especially by once scheme:
A kind of preparation method of the phosphogypsum filler for the production of PVC material: after phosphogypsum is mixed with water, obtain phosphogypsum slurries, after adding the alkali matter increasing calcium liquid accounting for phosphogypsum quality 2.5-3%, after carrying out immersion 1-1.5h, heat 15-30min, adding Vltra tears again regulates material pH to be after 7.0-7.6, after microwave heating 3-5min, send into layering filter tank stir, leave standstill after, remove supernatant liquid, lower floor's material is dried, obtains phosphogypsum filler.
The mass ratio that described phosphogypsum mixes with water is 1:(1-2).
The pH that described alkali matter increases calcium liquid is 8-11.
It is be 1:(1-3 in mass ratio by trade waste and calcium hydroxide that described alkali matter increases calcium liquid) mix.
Described trade waste be carbide slag, sugared slag, black liquid one or several.
Described high temperature is 150-200 DEG C, further preferably, and 150-180 DEG C.
The temperature of described microwave heating is 50-100 DEG C, further preferably, and 78 DEG C.
Described supernatant liquid contains organism film, soluble impurity.
Beneficial effect of the present invention
The present invention is by chemical process process phosphogypsum, foreign matter content is down to comparatively low degree, obtain high purity phosphogypsum, pass through pyroprocessing again, slough crystal water in phosphogypsum, coordinate Vltra tears to the adjustment of pH, alleviate the corrosive nature of mineral acid in phosphogypsum on the one hand, on the other hand, take Vltra tears as part, coordinate centered by survivor ion in phosphogypsum, coordinate exciting of microwave reaction simultaneously, filler is made to show good optical property, be applied in the production of PVC material, there is enhancing, reinforcement, the sex change of adjustment streams, improve the chemical property of PVC material, and be conducive to the optical property of PVC material.
The inventive method step is simple, easy to operate, equipment requirements is low, energy consumption consumes few in time, not only achieve the unification of phosphogypsum environmental benefit and economic benefit, also make filler Physicochemical functional, improve the lipophilicity of phosphogypsum simultaneously, make phosphogypsum surface-adsorbed macromolecule material, and then the polarity cushioned between itself and polymer is poor, and this filler contacts with polyvinyl chloride resin and makes, and the flowing property of its system is good, and then save the consumption that processes raw material of PVC material, there is good reduction effect for fusion time and plasticization temperature.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
A kind of preparation method of the phosphogypsum filler for the production of PVC material: after 500g phosphogypsum is mixed with 750g water, obtain phosphogypsum slurries, after adding the alkali matter increasing calcium liquid accounting for phosphogypsum quality 2.7%, after carrying out immersion 1h, at temperature is 180 DEG C, heat 23min, adding Vltra tears again regulates material pH to be after 7.0, at temperature is 50 DEG C after microwave heating 3min, send into layering filter tank stir, leave standstill after, remove supernatant liquid, lower floor's material is dried, obtains phosphogypsum filler.
The pH that described alkali matter increases calcium liquid is 11.
It is in mass ratio for 1:3 mixes by sugared slag and calcium hydroxide that described alkali matter increases calcium liquid.
Embodiment 2
A kind of preparation method of the phosphogypsum filler for the production of PVC material: after 500g phosphogypsum is mixed with 500g water, obtain phosphogypsum slurries, after adding the alkali matter increasing calcium liquid accounting for phosphogypsum quality 3%, after carrying out immersion 1.3h, 30min is heated at temperature is 150 DEG C, adding Vltra tears again regulates material pH to be after 7.3, at temperature is 100 DEG C after microwave heating 5min, send into layering filter tank stir, leave standstill after, remove supernatant liquid, lower floor's material is dried, obtains phosphogypsum filler.
The pH that described alkali matter increases calcium liquid is 10.
It is in mass ratio for 1:2 mixes by trade waste and calcium hydroxide that described alkali matter increases calcium liquid.
Described trade waste is 30% carbide slag, 35% sugared slag, 35% black liquid composition by massfraction proportioning.
Embodiment 3
A kind of preparation method of the phosphogypsum filler for the production of PVC material: after 400g phosphogypsum is mixed with 800g water, obtain phosphogypsum slurries, after adding the alkali matter increasing calcium liquid accounting for phosphogypsum quality 2.5%, after carrying out immersion 1.5h, 30min is heated at temperature is 200 DEG C, adding Vltra tears again regulates material pH to be after 7.6, at temperature is 78 DEG C after microwave heating 4min, send into layering filter tank stir, leave standstill after, remove supernatant liquid, lower floor's material is dried, obtains phosphogypsum filler.
The pH that described alkali matter increases calcium liquid is 8.
It is in mass ratio for 1:1 mixes by trade waste and calcium hydroxide that described alkali matter increases calcium liquid.
Described trade waste is 50% carbide slag, 50% black liquid composition by massfraction proportioning.
Test example 1
The phosphogypsum filler prepared by embodiment 1-3 is used in the processing of PVC profile, and its addition is 10% of polyvinyl chloride resin, test minimal torque, peak torque, fusion time and plasticization temperature, and its result is as shown in table 1:
Table 1
Minimal torque/Nm Peak torque/Nm Fusion time/s Plasticization temperature/DEG C
Embodiment 1 20.8 66.3 89 198.9
Embodiment 2 19.7 64.8 90 202.5
Embodiment 3 20.1 65.7 93 201.3

Claims (10)

1. the preparation method for the production of the phosphogypsum filler of PVC material, it is characterized in that, method is: after being mixed with water by phosphogypsum, obtain phosphogypsum slurries, after adding the alkali matter increasing calcium liquid accounting for phosphogypsum quality 2.5-3%, after carrying out immersion 1-1.5h, heat 15-30min, adding Vltra tears again regulates material pH to be after 7.0-7.6, after microwave heating 3-5min, send into layering filter tank stir, leave standstill after, remove supernatant liquid, lower floor's material is dried, obtains phosphogypsum filler.
2. as claimed in claim 1 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, the mass ratio that described phosphogypsum mixes with water is 1:(1-2).
3. as claimed in claim 1 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, the pH that described alkali matter increases calcium liquid is 8-11.
4. the preparation method of the phosphogypsum filler for the production of PVC material as described in claim 1 or 3, is characterized in that, it is be 1:(1-3 in mass ratio by trade waste and calcium hydroxide that described alkali matter increases calcium liquid) mix.
5., as claimed in claim 4 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, described trade waste be carbide slag, sugared slag, black liquid one or several.
6., as claimed in claim 1 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, described high temperature is 150-200 DEG C.
7. the preparation method of the phosphogypsum filler for the production of PVC material as described in claim 1 or 6, is characterized in that, described high temperature is 150-180 DEG C.
8., as claimed in claim 1 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, the temperature of described microwave heating is 50-100 DEG C.
9. the preparation method of the phosphogypsum filler for the production of PVC material as described in claim 1 or 8, is characterized in that, the temperature of described microwave heating is 78 DEG C.
10., as claimed in claim 1 for the production of the preparation method of the phosphogypsum filler of PVC material, it is characterized in that, described supernatant liquid contains organism film, soluble impurity.
CN201510845238.9A 2015-11-29 2015-11-29 Method for preparing ardealite filler for producing PVC (PVC) material Pending CN105348863A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102351448A (en) * 2011-07-07 2012-02-15 贵州凯德邦高新技术实业有限公司 Modification and innocuous treatment method of phosphogypsum
CN102731001A (en) * 2012-07-25 2012-10-17 广西鹿寨凯浩鹿宝新型建材有限公司 Phosphogypsum composite pretreatment technique
CN103435937A (en) * 2013-08-28 2013-12-11 贵州开磷遵义碱厂 Method for using phosphogypsum as polyvinyl chloride resin filler
CN104710151A (en) * 2015-02-04 2015-06-17 贵州开磷集团股份有限公司 Hemihydrate gypsum base material imitation stone floor and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102351448A (en) * 2011-07-07 2012-02-15 贵州凯德邦高新技术实业有限公司 Modification and innocuous treatment method of phosphogypsum
CN102731001A (en) * 2012-07-25 2012-10-17 广西鹿寨凯浩鹿宝新型建材有限公司 Phosphogypsum composite pretreatment technique
CN103435937A (en) * 2013-08-28 2013-12-11 贵州开磷遵义碱厂 Method for using phosphogypsum as polyvinyl chloride resin filler
CN104710151A (en) * 2015-02-04 2015-06-17 贵州开磷集团股份有限公司 Hemihydrate gypsum base material imitation stone floor and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
马鸿文: "《工业矿物与岩石》", 31 August 2002, 北京:地质出版社 *

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