Water-resistant phosphogypsum block and preparation process thereof

A technology of phosphogypsum and blocks, which is applied in the field of gypsum blocks, can solve problems such as poor water resistance, and achieve the effects of easy availability of raw materials, widening the scope of application, and simple manufacturing processes

Inactive Publication Date: 2017-12-22
南通绿洲节能环保产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above problem of poor water resistance of gypsum blocks, the present invention provides a water-resistant phosphogypsum block, the produced blocks are used in inner partition walls and are suitable for automatic production

Method used

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  • Water-resistant phosphogypsum block and preparation process thereof
  • Water-resistant phosphogypsum block and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The sample formula is: 1000g of phosphogypsum, 20g of polyvinyl alcohol, 10g of styrene-acrylate emulsion with a solid content of 50%, 5g of paraffin wax emulsion with a content of 30%, 3g of hydrogen-containing silicone oil, 5g of nano-based water reducer, and 776.5g of water 1. Silicone defoamer 1g. The preparation process is as follows: 20 g of polyvinyl alcohol is dissolved in 200 g of water to prepare a polyvinyl alcohol solution, and then the silicone defoamer is dissolved in the polyvinyl alcohol solution to prepare a mixed solution. Then mix the mixed solution, styrene-acrylate emulsion with a solid content of 50%, paraffin wax emulsion with a solid content of 30%, hydrogen-containing silicone oil, nano-based water reducer, and water to form a slurry. Then put the phosphogypsum in the slurry, stir well to make a mixture, and pour the mixture into a mold for forming. After the initial setting of the phosphogypsum block, it is taken out from the mold and placed u...

Embodiment 2

[0018] The sample formula is: 1000g of phosphogypsum, 30g of polyvinyl alcohol, 40g of styrene-acrylate emulsion with a solid content of 50%, 5g of paraffin wax emulsion with a content of 30%, 3g of hydrogen-containing silicone oil, 5g of nano-based water reducer, and 776.5g of water , Potassium aluminum sulfate dodecahydrate 5g, calcium hydroxide 5g, silicone defoamer 2g. The preparation process is as follows: 30 g of polyvinyl alcohol is dissolved in 200 g of water to prepare a polyvinyl alcohol solution, and then aluminum potassium sulfate dodecahydrate and organic silicon defoamer are dissolved in the polyvinyl alcohol solution to prepare a mixed solution. Mix the mixed solution, styrene-acrylate emulsion with a solid content of 50%, paraffin wax emulsion with a solid content of 30%, hydrogen-containing silicone oil, nano-based water reducer, 576.5g of water, and calcium hydroxide to make a slurry. Then put the phosphogypsum in the slurry, stir well to make a mixture, and ...

Embodiment 3

[0020] The sample formula is: 1000g of phosphogypsum, 30g of polyvinyl alcohol, 40g of styrene-acrylate emulsion with a solid content of 50%, 5g of paraffin wax emulsion with a content of 30%, 3g of hydrogen-containing silicone oil, 5g of nano-based water reducer, and 776.5g of water , Potassium aluminum sulfate dodecahydrate 6g, calcium hydroxide 5g, white Portland cement 2g, sulfoaluminate cement 5g, organosilicon defoamer 2g. The preparation process is as follows: 30 g of polyvinyl alcohol is dissolved in 200 g of water to prepare a polyvinyl alcohol solution, and then aluminum potassium sulfate dodecahydrate and organic silicon defoamer are dissolved in the polyvinyl alcohol solution to prepare a mixed solution. Mix the mixed solution, styrene-acrylate emulsion with a solid content of 50%, paraffin wax emulsion with a solid content of 30%, hydrogen-containing silicone oil, nano-based water reducer, 576.5g of water, and calcium hydroxide to make a slurry. Then put the phosp...

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Abstract

The invention provides a water-resistant phosphogypsum block and a preparation process thereof. The water-resistant phosphogypsum block comprises the following raw materials by weight: 70%-100% of phosphogypsum, 50%-80% of water, 3-8% of polyvinyl alcohol, 3%-6% of styrene-acrylic ester emulsion, 0.05%-0.8% of paraffin emulsion, 0.01%-1.5% of hydrosilicone oil, 0.1%-2% of a naphthalene-series superplasticizer, 0.2%-2% of white portland cement, 0.1%-5% of sulphoaluminate cement, 0.1%-10% of calcium hydroxide, 0.01%-6% of aluminum potassium sulfate dodecahydrate and 0.01% to 1% of aluminum sulfate. The preparation process comprises four specific steps of pulp preparation, molding, stripping and drying. The phosphogypsum setting time and mechanical strength can be effectively adjusted by different components in the formula. Automated production is taken into account, and meanwhile the problems of low mechanical strength and poor water resistance of pure phosphogypsum under high alkalinity conditions can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of gypsum blocks of building materials, and in particular relates to a water-resistant phosphogypsum block and a preparation method thereof. Background of the invention [0002] Phosphogypsum is a kind of solid waste, which mainly comes from the production process of phosphate fertilizer. For every 1 ton of phosphate fertilizer produced, 6 tons of phosphogypsum are produced. At present, the utilization rate of phosphogypsum is low, and its treatment process is mainly based on stacking, which causes great pollution to the surrounding environment. The reuse of phosphogypsum can not only realize the recycling of solid waste, but also beautify the environment. At present, the utilization of phosphogypsum in my country mainly focuses on soil improvement, cement retarder, fired sulfate cement, non-calcined phosphogypsum, phosphogypsum blocks, and phosphogypsum binders. In terms of gypsum blocks, phosphogypsum bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B28C5/00C04B111/27
CPCC04B28/143B28C5/006C04B2111/00112C04B2111/27C04B2201/50C04B22/002C04B24/2623C04B24/2676C04B24/36C04B24/42C04B2103/302C04B7/02C04B7/32C04B22/064C04B22/148
Inventor 朱哲誉施鑫张凯梅杨秋
Owner 南通绿洲节能环保产品有限公司
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