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Phosphorus gypsum foam product and method for preparing same

A technology of foamed products and phosphogypsum, which is applied in the field of building materials, can solve the problems of high equipment requirements, poor economic benefits, and high production costs, and achieve the effects of good economic benefits, low cost, and satisfactory performance of molded products

Inactive Publication Date: 2017-03-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some of the foam products introduced in the above-mentioned patents have high early strength and some have special pertinence, they are all mixed with cement or cement clinker, and the dosage is relatively high, or admixtures are also mixed, and the production cost is relatively high.
Moreover, some of them use autoclave curing or microwave high-temperature treatment, which has high requirements for equipment, and the process is complicated and the economic benefit is poor.

Method used

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  • Phosphorus gypsum foam product and method for preparing same
  • Phosphorus gypsum foam product and method for preparing same
  • Phosphorus gypsum foam product and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, steel slag is taken from Wuhan Iron and Steel Co., Ltd., and after drying, it is ground into steel slag powder. According to GB / T8074-2008 "Method for Determination of Cement Specific Surface Area", the Blaine specific surface area is 394m 2 / Kg; The slag is taken from Wuhan Iron and Steel Co., Ltd., and it is ground into slag powder after drying. The measured Blaine specific surface area is: 411m 2 / Kg; Phosphogypsum is obtained from Hubei Huangmailing Phosphorus Chemical Co., Ltd., and dried in an oven at 170°C for 1 hour; the foaming agent is a hydrogen peroxide solution with a mass fraction of 30%; the water reducing agent is a standard polycarboxylic acid reducing agent. Aqua.

[0028] Phosphogypsum foamed products (numbered G0-G5, with different amounts of steel slag), the raw materials of which include solid waste, admixture and water; wherein, the components in the solid waste and admixture are: steel slag 7%-12% powder, 50.4%-55.4% slag powder...

Embodiment 2

[0037] In this example, steel slag is taken from Wuhan Iron and Steel Co., Ltd., and after drying, it is ground into steel slag powder. According to GB / T8074-2008 "Method for Determination of Cement Specific Surface Area", the Blaine specific surface area is 394m 2 / Kg; The slag is taken from Wuhan Iron and Steel Co., Ltd., and it is ground into slag powder after drying. The measured Blaine specific surface area is: 411m 2 / Kg; Phosphogypsum is taken from Hubei Huangmailing Phosphorus Chemical Co., Ltd., and dried in an oven at 250°C for 0.5 hours; the foaming agent is a hydrogen peroxide solution with a mass fraction of 30%; the water reducing agent is a standard polycarboxylate water reducer .

[0038] Phosphogypsum foamed products (numbered H45-H51, with different water additions), the raw materials of which include solid waste, admixture and water; wherein, the components in the solid waste and admixture are: steel slag 10% powder, 53.53% slag powder, 35% phosphogypsum he...

Embodiment 3

[0043] In this example, steel slag is taken from Wuhan Iron and Steel Co., Ltd., and after drying, it is ground into steel slag powder. According to GB / T8074-2008 "Method for Determination of Cement Specific Surface Area", the Blaine specific surface area is 394m 2 / Kg; The slag is taken from Wuhan Iron and Steel Co., Ltd., and it is ground into slag powder after drying. The measured Blaine specific surface area is: 411m 2 / Kg; Phosphogypsum was obtained from Hubei Huangmailing Phosphorus Chemical Co., Ltd., and dried in an oven at 200°C for 0.8 hours; the foaming agent was 30% hydrogen peroxide solution; the water reducer was standard polycarboxylate water reducer.

[0044] Phosphogypsum foamed products (numbered J1-J5, the amount of water reducer is different), its raw materials include solid waste, admixture and water; wherein, the components in the solid waste and admixture are : Steel slag powder 8%, slag powder 55.31% ~ 55.75%, phosphogypsum hemihydrate 35%, hydrogen per...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a phosphorus gypsum foam product and a method for preparing the same. The phosphorus gypsum foam product is made of solid waste, admixtures and water. The solid waste includes phosphorus gypsum, steel slag and mineral waste residues, and the admixtures include hydrogen peroxide foaming agents and polycarboxylate water reducing agents. The phosphorus gypsum foam product and the method have the advantages that the phosphorus gypsum foam product is free of cement or cement clinker, the solid waste such as the phosphorus gypsum is high in usage and low in cost, accordingly, the phosphorus gypsum foam product and the method are favorable for consuming a large quantity of phosphorus gypsum which is an industrial byproduct, and waste can be turned into wealth.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a phosphogypsum foamed product and a preparation method thereof. Background technique [0002] Phosphogypsum is an industrial by-product of phosphoric acid produced by wet process in phosphorus chemical enterprises. Every 1 ton of phosphoric acid will produce about 5 tons of phosphogypsum. According to statistics, the discharge of phosphogypsum in my country has exceeded 70 million tons, and the stockpile has reached 250 million tons, and this number is still increasing year by year. However, the utilization rate of phosphogypsum does not exceed 25%, and a large amount of unusable phosphogypsum can only be disposed of by stacking, which not only occupies a large amount of land resources, but also pollutes the environment; at the same time, my country's natural stone resources are also increasingly depleted. Therefore, it is imminent to find a method that c...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/14C04B18/14C04B111/40C04B111/52
CPCC04B28/143C04B2111/40C04B2111/52C04B2201/20C04B2201/50C04B18/141C04B18/142C04B2103/302C04B22/068C04B38/02C04B38/0067Y02W30/91
Inventor 林宗寿杨杰
Owner WUHAN UNIV OF TECH
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