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A phosphogypsum curing agent

A technology of curing agent and phosphogypsum, which is applied in the field of phosphogypsum curing agent, can solve the problems of water pollution of phosphogypsum, achieve the effect of reducing demand, solving stacking pollution environment, and good water stability

Active Publication Date: 2020-04-14
成都磷固新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third is the water pollution problem of phosphogypsum

Method used

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  • A phosphogypsum curing agent
  • A phosphogypsum curing agent
  • A phosphogypsum curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] [Example 1] A phosphogypsum curing agent is made of the following components in proportions by weight:

[0038] Ca(OH) 2 4 parts,

[0039] K 2 CO 3 0.4 parts,

[0040] 0.08 parts of resin,

[0041] 0.25 part of diester,

[0042] 0.1 part of antacid,

[0043] 1 part of alum powder.

Embodiment 2

[0044] [Example 2] A phosphogypsum curing agent is made of the following components in proportions by weight:

[0045] Ca(OH) 2 5 copies,

[0046] K 2 CO 3 0.5 parts,

[0047] 0.11 parts of resin,

[0048] 0.3 part of diester,

[0049] 0.2 part of antacid,

[0050] 2 parts of alum powder.

[0051] In the present embodiment, the phosphogypsum curing agent also includes a gelling agent, and the gelling agent is cement, and the ratio of the weight of the gelling agent to the sum of the weights of the remaining components in the curing agent is 50:1. Gelling agent is a kind of good binder, which can quickly form silica gel or calcium silicate gel with calcium ions in phosphogypsum, play the role of glue bonding and filling gaps, and improve the strength and bearing capacity of the mixture.

Embodiment 3

[0052] [Example 3] A phosphogypsum curing agent is made of the following components in proportions by weight:

[0053] Ca(OH) 2 4.5 servings,

[0054] K 2 CO 3 0.45 parts,

[0055] 0.09 parts of resin,

[0056] 0.28 part of diester,

[0057] Antacid 0.15 part,

[0058] 1 part of alum powder.

[0059] In the present embodiment, the phosphogypsum curing agent also includes a gelling agent, the gelling agent is gypsum, and the ratio of the weight of the gelling agent to the sum of the weight of the remaining components in the curing agent is 60:1. Gelling agent is a good adhesive, which can quickly form silica gel or calcium silicate gel with calcium ions, play the role of glue bonding and filling gaps, and improve the strength and bearing capacity of the base layer.

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Abstract

The invention discloses a phosphorus gypsum curing agent. The phosphorus gypsum curing agent is prepared from the following components in parts by weight: 4 to 5 parts of Ca(OH)2, 0.4 to 0.5 part of K2CO3, 0.08 to 0.11 part of resin, 0.25 to 0.3 parts of diester, 0.1 to 0.2 part of an antacid and 1 to 2 parts of alum powder. The curing agent is prepared by adopting a mode of a reducing agent plusa gelling agent, wherein the ratio of the weight of the gelling agent to the sum of the weight of the rest components in the curing agent is (50 to 60):1; the reducing agent in the curing agent stabilizes soluble P2O5 and Fe<2+> in phosphorus gypsum by displacement and reduction actions and restores harmful components in the phosphorus gypsum into crystals to obtain a harmless and stable materialwhich is coated by the gelling agent. The improved phosphorus gypsum produced by the curing agent has certain unconfined compressive strength and water stability and can be used for roadbed filler andmaterials with other purposes; the phosphorus gypsum can be used on a large scale, so that the problem of pollution to the environment caused by stacking of the phosphorus gypsum is solved; meanwhile, the demand of a project on sand and pebbles is greatly reduced; the phosphorus gypsum curing agent has important environmental significance and social and economic benefits.

Description

technical field [0001] The invention relates to a curing agent formula, in particular to a phosphogypsum curing agent. Background technique [0002] Phosphogypsum is a kind of waste produced in the process of producing ammonium phosphate, which contains certain organic phosphorus and inorganic phosphorus residues, making phosphogypsum acidic. According to the current production process, about 4 tons of phosphogypsum are discharged for every 1 ton of ammonium phosphate produced. Today, phosphogypsum can only be treated as waste residue, and they are all stacked in the open air, year after year, occupying a large amount of land, and soluble P 2 o 5 and Fe 2+ Leach out with rainwater to produce acidic waste water, which will seep into the ground for a long time, affecting ground water and polluting the environment. my country is the world's largest phosphogypsum discharge country, and the national annual discharge of phosphogypsum reaches 8-12 million tons. Therefore, if p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/04C04B28/14
CPCC04B28/143C04B40/0042C04B2111/0075C04B22/064C04B22/10C04B24/00C04B24/045C04B22/142C04B2103/0068C04B7/00
Inventor 曹新文李忠金
Owner 成都磷固新材料科技有限公司
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