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Hemihydrate phosphogypsum-based filling material and preparation method and application thereof

A technology of hemihydrate phosphogypsum and filling material, which is applied in the fields of filling, mining equipment, earthwork drilling, etc., can solve the problems of inability to activate phosphogypsum alkali, low content of alkaline components in low-calcium fly ash, etc., and achieve low cost , good liquidity, cost reduction effect

Active Publication Date: 2019-10-11
山东塔罗斯智能装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the inventor believes that both of the above two patents use low-calcium fly ash to modify phosphogypsum. Due to the low content of alkaline components in low-calcium fly ash, the phosphogypsum cannot be effectively activated by alkali.

Method used

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  • Hemihydrate phosphogypsum-based filling material and preparation method and application thereof
  • Hemihydrate phosphogypsum-based filling material and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0044] A preparation method of hemihydrate phosphogypsum-based filling material, comprising the steps of:

[0045] (1) Get the following raw materials in parts by weight: 100 parts of phosphogypsum hemihydrate, 20 parts of auxiliary gel material (the component distribution ratio is: 70 parts of high calcium fly ash, 20 parts of wet discharge fly ash, 10 parts of cement) , 5 parts of composite coagulant (the component distribution ratio is 40 parts of sodium metasilicate, 60 parts of sodium hydroxide), 5 parts of adsorption dispersant (the component distribution ratio is: 40 parts of calcium-based bentonite, 60 parts of sodium-based bentonite), 4 parts of hydroxypropyl methylcellulose ether, 1 part of composite water reducer (component distribution ratio: 40 parts of polycarboxylate superplasticizer, 60 parts of Nai series water reducer);

[0046] (2) mixing and stirring the raw materials prepared in step (1) and water at a mass ratio of 1:0.8 to obtain a hemihydrate phosphogyp...

Embodiment 2

[0049] A preparation method of hemihydrate phosphogypsum-based filling material, comprising the steps of:

[0050] (1) Get the following raw materials in parts by weight: 150 parts of phosphogypsum hemihydrate, 15 parts of auxiliary gel material (the component distribution ratio is: 80 parts of high calcium fly ash, 15 parts of wet row fly ash, 5 parts of cement) , 2 parts of composite coagulant (the component ratio is 30 parts of sodium metasilicate, 70 parts of sodium hydroxide), 2 parts of adsorption dispersant (the component ratio is: 60 parts of calcium-based bentonite, 40 parts of sodium-based bentonite), 2 parts of hydroxypropyl methylcellulose ether, 1.5 parts of composite water reducer (component ratio: 60 parts of polycarboxylate high-efficiency water reducer, 40 parts of Nai series water reducer);

[0051] (2) mixing and stirring the raw materials prepared in step (1) and water at a mass ratio of 1:0.9 to obtain a hemihydrate phosphogypsum-based filling material;

...

Embodiment 3

[0054] A preparation method of hemihydrate phosphogypsum-based filling material, comprising the steps of:

[0055] (1) The following raw materials are taken in parts by weight: 50 parts of phosphogypsum hemihydrate, 15 parts of auxiliary gel material (the component distribution ratio is: 60 parts of high-calcium fly ash, 30 parts of wet-discharge fly ash, 10 parts of cement) , 3 parts of composite coagulant (component ratio: 35 parts of sodium metasilicate, 65 parts of sodium hydroxide), 3 parts of adsorption dispersant (component ratio: 45 parts of calcium-based bentonite, 55 parts of sodium-based bentonite), 3 parts of hydroxypropyl methylcellulose ether, 0.5 parts of composite water reducer (component ratio: 50 parts of polycarboxylate superplasticizer, 50 parts of Nai series water reducer);

[0056] (2) mixing and stirring the raw materials prepared in step (1) and water at a mass ratio of 1:1.0 to obtain a hemihydrate phosphogypsum-based filling material;

[0057] (3) Tr...

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Abstract

The invention relates to the technical field of mine filling materials, in particular to a hemihydrate phosphogypsum-based filling material and a preparation method and application thereof. The material is prepared from, by weight, 50-150 parts of hemihydrate phosphogypsum, 10-20 parts of an auxiliary gel material, 2-5 parts of a coagulant, 2-5 parts of an adsorption dispersant, 2-5 parts of a water-retaining agent and 0.5-1.5 parts of a water reducing agent; the auxiliary gel material is prepared from, by weight, 60-80 parts of high-calcium fly ash, 15-30 parts of wet-discharged fly-ash and 5-10 parts of cement. Accordingly, the hemihydrate phosphogypsum serves as a main gel material, the high-calcium fly ash is combined to serve as the auxiliary gel material, the activity of the gel material is stimulated through the composite coagulant, one or multiple admixtures are blended, and the mine filling material which is high in concretion strength, good in fluidity, good in water retention, good in suspension and dispersion, easy to transport, low in cost, environmentally friendly and capable of saving energy is prepared.

Description

technical field [0001] The invention relates to the technical field of mine filling materials, in particular to a hemihydrate phosphogypsum-based filling material and its preparation method and application. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Phosphogypsum is the solid waste generated during the production of phosphoric acid by the wet method. The utilization rate is extremely low, and most of them are disposed of by storage. It has become a safety and environmental protection problem that needs to be solved urgently. [0004] At present, many studies use phosphogypsum in mine filling. For example, patent document CN 103964804B discloses a metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14E21F15/00
CPCC04B28/143C04B2111/00724C04B2201/50E21F15/005C04B18/08C04B7/02C04B22/062C04B12/04C04B14/104C04B24/383C04B2103/302C04B24/226
Inventor 田冬韩斌张亮亮王坤杜东升刘洋于海洋
Owner 山东塔罗斯智能装备有限公司
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