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Preparation method of phosphogypsum-based high-fluidity water-resistant mortar

A high-fluidity, phosphogypsum technology, applied in the field of mortar, can solve the problems that hinder the high-value application of phosphogypsum, poor mortar fluidity, poor water resistance, etc., to improve strength, increase mortar strength, improve strength and water resistance Effect

Pending Publication Date: 2021-04-13
成都建工赛利混凝土有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The inventors found that the mortar prepared by the above method through phosphogypsum has poor fluidity, low strength, and poor water resistance, which hinders the high-value application of phosphogypsum

Method used

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  • Preparation method of phosphogypsum-based high-fluidity water-resistant mortar
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  • Preparation method of phosphogypsum-based high-fluidity water-resistant mortar

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Embodiment 1

[0041] A preparation method of phosphogypsum-based high-fluidity water-resistant mortar, comprising the following steps:

[0042] Step 1, chemical shaping of industrial phosphogypsum: Add industrial phosphogypsum to the electrolyte solution containing succinic acid and metal cations, the metal cations are iron ions provided by ferric sulfate, and the electrolyte solution is sodium chloride solution. Under the same conditions, crystallize for 80 minutes to obtain phosphogypsum with equiaxed grains; the aspect ratio, aspect ratio or aspect ratio of the obtained equiaxed gypsum grains are all less than 1.5; the addition of succinic acid is 0.2kg, iron sulfate The addition amount of 0.3kg;

[0043] Step 2, high temperature treatment: treat phosphogypsum at a temperature of 400-1000°C for 1-30 minutes to obtain inert phosphogypsum;

[0044] Step 3: Add spherical silica-alumina raw materials, nano-powder materials, calcium raw materials, reinforcing agents, flow enhancers, water-re...

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Abstract

The invention relates to the field of mortar, and particularly discloses a preparation method of phosphogypsum-based high-fluidity water-resistant mortar. The method comprises the following steps: step 1, chemical shaping of industrial phosphogypsum: adding the industrial phosphogypsum into an electrolyte solution containing organic acid and metal cations, wherein the metal cations are one of iron ions and aluminum ions provided by ferric sulfate and aluminum sulfate, and performing crystallizing for 30-120 minutes at the temperature of 60-140 DEG C to prepare the phosphogypsum with equiaxed crystal grains; step 2, high-temperature treatment: treating the phosphogypsum at the temperature of 400-1000 DEG C for 1-30 minutes to obtain inert phosphogypsum; and 3, adding the spherical silicon-aluminum material, the nano-powder material, the calcium material, the reinforcing agent, the flow increasing agent, the water-resistant agent and the stabilizer into the inert phosphogypsum, uniformly mixing, adding water, and uniformly stirring to obtain the high-fluidity water-resistant mortar. The mortar prepared by the method disclosed by the invention is high in strength, good in water resistance and high in flowability, and cyclic utilization of resources is realized.

Description

technical field [0001] The application relates to the technical field of mortar, more specifically, it relates to a preparation method of phosphogypsum-based high-fluidity water-resistant mortar. Background technique [0002] Phosphogypsum is the industrial waste discharged during the production process of wet-process phosphoric acid, and dihydrate gypsum (CaSO 4 2H 2 O) is the main component. In addition, it also contains a small amount of impurities such as undecomposed phosphate rock powder, free phosphoric acid, iron phosphate, aluminum phosphate and fluorosilicate; the annual discharge of phosphogypsum in the world is close to 200 million tons, and the annual discharge of phosphogypsum in my country is also more than 1,000 tons. This not only takes up a lot of land, but also seriously pollutes the environment. In order to realize the rational utilization of resources, the industrial application of phosphogypsum has been studied for a long time. [0003] At present, r...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B111/27
CPCC04B28/143C04B2201/50C04B2111/27
Inventor 和德亮吴涛杨军肖世玉陶俊张奔曹兴谭宏斌马小玲杨飞华王进陈德玉贺小春王进明
Owner 成都建工赛利混凝土有限公司
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