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A kind of phosphogypsum light board prepared by using barium slag and its preparation method

A technology of phosphogypsum and dihydrate phosphogypsum, which is applied in the field of building materials, can solve the problems of occupying large land resources, there is no large-scale use of phosphogypsum waste, and harmful ion soil environmental pollution, etc., to achieve adjustable bulk density and optimization Microstructure of hardened body, effect of improving overall performance

Active Publication Date: 2020-11-17
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment method of barium slag is still based on stockpiling, which not only occupies a large amount of land resources, but also causes serious pollution of the soil environment due to the leaching of harmful ions
[0005] At present, there is no method for large-scale utilization of wastes such as phosphogypsum and barium slag

Method used

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  • A kind of phosphogypsum light board prepared by using barium slag and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Provide a kind of phosphogypsum lightweight board prepared by barium slag, its component and weight content include:

[0028] 10 parts of barium slag, 4 parts of dihydrate phosphogypsum, 64 parts of phosphorus high-strength gypsum, phosphorus building gypsum (CaSO 4 0.5H 2 (mass fraction greater than 85%) 16 parts, metakaolin 5 parts, carbide slag 1 part, light aggregate 1.2 parts, retarder 0.1 part, water reducing agent 0.2 part, water retaining agent 0.1 part.

[0029] The preparation method steps are as follows:

[0030] 1) Preparation of modified barium slag slurry: mix barium slag and phosphogypsum dihydrate with water at a solid-to-liquid ratio of 1:3, and stir at 45°C for 1.5 hours to obtain modified barium slag slurry;

[0031] 2) Preparation of phosphogypsum light board, adding the modified barium slag slurry obtained in step 1) and phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, retarder, water reducing agent and water retaining age...

Embodiment 2

[0034] Provide a kind of phosphogypsum lightweight board prepared by barium slag, its component and weight content include:

[0035] 20 parts of barium slag, 10 parts of phosphogypsum dihydrate, 48 parts of phosphorus high-strength gypsum, 12 parts of phosphorus building gypsum, 10 parts of metakaolin, 3 parts of carbide slag, 0.5 parts of light aggregate, and 0.3 parts of water reducer.

[0036] The preparation method steps are as follows:

[0037] 1) Preparation of modified barium slag slurry: mix barium slag and phosphogypsum dihydrate with water at a solid-to-liquid ratio of 1:1.6, and stir at 55°C for 2.5 hours to obtain modified barium slag slurry;

[0038] 2) Preparation of phosphogypsum light board, adding the modified barium slag slurry obtained in step 1) and phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, retarder, water reducing agent and water retaining agent into the mixer , stirred for 3 minutes, and then the stirred slurry was quickly...

Embodiment 3

[0041] Provide a kind of phosphogypsum lightweight board prepared by barium slag, its component and weight content include:

[0042] 15 parts of barium slag, 7 parts of dihydrate phosphogypsum, 60 parts of phosphorus high-strength gypsum, 15 parts of phosphorus architectural gypsum, 10 parts of metakaolin, 2 parts of carbide slag, 0.8 parts of light aggregate, 0.05 parts of retarder, 0.1 parts of water reducer part, 0.05 part of water retaining agent.

[0043] The preparation method steps are as follows:

[0044] 1) Preparation of modified barium slag slurry: mix barium slag and phosphogypsum dihydrate with water at a solid-to-liquid ratio of 1:2.3, and stir at 50°C for 2 hours to obtain modified barium slag slurry;

[0045] 2) Preparation of phosphogypsum light board, adding the modified barium slag slurry obtained in step 1) and phosphorus hemihydrate gypsum, metakaolin, carbide slag, light aggregate, retarder, water reducing agent and water retaining agent into the mixer ...

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Abstract

The invention relates to a phosphogypsum light-weight sheet material prepared from barium dreg and a preparation method thereof. The phosphogypsum light-weight sheet material is prepared from the following raw material components in parts by mass: 10 to 20 parts of the barium dreg, 4 to 10 parts of phosphogypsum dihydrate, 60 to 80 parts of phosphorous hemihydrate gypsum, 5 to 15 parts of metakaolin, 1 to 3 parts of carbide slag, 0.5 to 1.2 parts of light aggregate, 0 to 0.1 part of set retarder, 0.1 to 0.3 part of water reducing agent and 0 to 0.1 part of water-retaining agent. The phosphogypsum light-weight sheet material prepared from the barium dreg, provided by the invention, has the advantages of light weight and heat insulation; the volume weight is adjustable in a range of 600 to 1,000Kg / m<3> and the thermal conductivity coefficient is lower than 0.15W / (m*K); the phosphogypsum light-weight sheet material has no obvious layering and cracking and the problem that a traditional cement sheet material is cracked by shrinkage can be effectively overcome by utilizing a micro-expansion property of gypsum hydration; each performance of the prepared light-weight sheet material can meet standards of General Technical Requirements of Light Weight Panel used for Building Partition Wall JGT169-2016.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a phosphogypsum light board prepared by using barium slag and a preparation method thereof. Background technique [0002] Phosphogypsum is the most important industrial by-product in my country's phosphorus chemical industry, and every ton of P produced 2 o 5 Need to discharge [0003] 4.5-5 tons of phosphogypsum. Because phosphogypsum contains harmful impurities such as phosphorus, fluorine, and organic matter, there is currently no effective pretreatment technology that can completely eliminate the impact of impurities, resulting in low added value of related products prepared from phosphogypsum, and enterprises are not motivated to use phosphogypsum. It is mainly handled by open-air storage. According to statistics, the cumulative stockpiles of phosphogypsum in my country have exceeded 300 million tons. The stockpiling of phosphogypsum is increasing day by day, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B111/40
CPCC04B28/145C04B2111/40C04B2201/20C04B2201/32C04B2201/50C04B18/144C04B22/144C04B14/106C04B18/0481C04B16/08C04B2103/22C04B24/128C04B24/383
Inventor 马保国金子豪苏英孙仲达吴潇
Owner WUHAN UNIV OF TECH
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