Pollution-free manufacturing method for producing PVC filler from phosphogypsum

A manufacturing method and phosphogypsum technology, applied in the field of new building materials, can solve the problems of difficult process control and high gypsum treatment cost, and achieve the effects of meeting product quality standard requirements, dense crystal structure, and improving supersaturation.

Inactive Publication Date: 2020-01-07
武穴市诚润祥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the method of using gypsum as filler to produce polyvinyl chloride generally adopts high-temperature roasting treatment, which leads to high cost of gypsum treatment in this method and difficulty in process control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of manufacture method that pollution-free phosphogypsum produces PVC filler, comprises the following steps:

[0013] (1) Take phosphogypsum and fry it at a temperature of 120°C for 60-min. The main component is gypsum with half of crystal water, and it also contains type II gypsum, type III gypsum and anhydrous gypsum Coexisting materials.

[0014] (2) Take the ethylene-methyl mercaptide blend, nano zirconium dioxide and mix evenly with the material, and then obtain the PVC filler after grinding and modifying.

[0015] The amount of the ethylene-methyl mercaptide tin blend is 1% of the mass of the phosphogypsum material, and the amount of the nanometer zirconia is 2% of the mass of the phosphogypsum material.

Embodiment 2

[0017] A kind of manufacture method that pollution-free phosphogypsum produces PVC filler, comprises the following steps:

[0018] (1) Take phosphogypsum and fry it at a temperature of 200°C for 90 minutes to form gypsum with half of crystal water as the main component, and at the same time contain type II gypsum, type III gypsum and anhydrous gypsum. materials.

[0019] (2) Take the ethylene-methyl mercaptide blend, nano zirconium dioxide and mix evenly with the material, and then obtain the PVC filler after grinding and modifying.

[0020] The amount of the ethylene-methyl mercaptide tin blend is 3% of the mass of the phosphogypsum material, and the amount of the nanometer zirconia is 5% of the mass of the phosphogypsum material.

Embodiment 3

[0022] A kind of manufacture method that pollution-free phosphogypsum produces PVC filler, comprises the following steps:

[0023] (1) Take phosphogypsum and fry it at a temperature of 250°C for 110 minutes to form gypsum with half of crystal water as the main component, and at the same time contain type II gypsum, type III gypsum and anhydrous gypsum. materials.

[0024] (2) Take the ethylene-methyl mercaptide blend, nano zirconium dioxide and mix evenly with the material, and then obtain the PVC filler after grinding and modifying.

[0025] The amount of the ethylene-methyl mercaptide tin blend is 4% of the mass of the phosphogypsum material, and the amount of the nanometer zirconia is 8% of the mass of the phosphogypsum material.

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Abstract

The invention discloses a pollution-free manufacturing method for producing a PVC filler from phosphogypsum. The preparation method comprises the following steps: (1) taking phosphogypsum, and stir-frying at the temperature of 120-250 DEG C for 60-110 min to obtain a material which takes gypsum with 1/2 of crystal water as a main component and contains II-type gypsum, III-type gypsum and anhydrousgypsum at the same time; and (2) taking an ethylene-methyl tin mercaptide co-mixture and nano zirconium dioxide and uniformly mixing the ethylene-methyl tin mercaptide co-mixture and nano zirconium dioxide with the material, and grinding and modifying to obtain a PVC filler. In the PVC preparation process, the foamability in the PVC processing process is reduced, and the rheological property is improved. The preparation process is simple, high-temperature roasting treatment is not needed, the production process is easy and convenient to operate, and the product quality standard requirement can be met.

Description

technical field [0001] The invention belongs to the field of new building materials, and in particular relates to a method for producing PVC fillers from pollution-free phosphogypsum. Background technique [0002] Phosphogypsum: refers to the solid waste generated when sulfuric acid is used to treat phosphate rock in the production of phosphoric acid, and its main component is calcium sulfate. The main components of phosphogypsum are: CaSO4·2H2O, and it also contains many other impurities. Phosphogypsum is generally powdery, and its appearance is generally grayish white, grayish yellow, light green and other colors, and it also contains organic phosphorus, sulfur and fluorine compounds, with a bulk density of 0.733-0.88g / cm3 and a particle diameter of 5-15um. Its main components are Calcium sulfate dihydrate, its content can generally reach about 70-90%. The secondary components contained in it vary with the origin of phosphate rock, and generally contain rock components Ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/00C08K3/30C08K5/58C08K3/22
CPCC08K3/22C08K3/30C08K5/58C08K9/00C08K2003/2244C08K2003/3045C08K2201/011C08K2201/014C08L27/06
Inventor 宋娜
Owner 武穴市诚润祥科技有限公司
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