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Method for preparing magnesium building material product from magnesium-based desulfurization turbid liquid

A technology for turbid liquid and building materials, which is applied in the field of magnesium building materials products and magnesium-based desulfurization turbid solutions to prepare magnesium building materials products, can solve the problem that magnesium oxysulfide cement cannot provide sufficient magnesium sulfate concentration, and the early strength and water resistance of magnesium oxysulfide cement are reduced. Environmental pollution and other problems, to achieve the effect of high fire rating, good fluidity and low preparation cost

Pending Publication Date: 2021-12-03
辽宁科大中驰镁建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only causes waste but also pollutes the environment. Adopting new mixing technology and new formula to mix liquid and sediment residue to make them into products is not only resource recycling, but also a great thing that benefits the country and the people.
In CN201410742444.2 patent, Zhang Tiezhi used desulfurization solution instead of magnesium sulfate crystals to prepare magnesium oxysulfate cement. Although the mechanical properties of the cement were relatively high, the early strength and water resistance of magnesium oxysulfide cement decreased with the increase in the amount of desulfurization solution. and decreased, which is attributed to the fact that the desulfurization solution cannot provide sufficient magnesium sulfate concentration for magnesium oxysulfate cement

Method used

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  • Method for preparing magnesium building material product from magnesium-based desulfurization turbid liquid
  • Method for preparing magnesium building material product from magnesium-based desulfurization turbid liquid
  • Method for preparing magnesium building material product from magnesium-based desulfurization turbid liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw materials for preparing the formula are: 100g of light-burned magnesium oxide powder, 80g of magnesium sulfate heptahydrate, 50g of desulfurization turbid liquid, 30g of steel slag powder, 15g of sawdust, 5g of straw, and 2g of citric acid.

[0025] Example 1 The preparation process of a magnesium-based desulfurization turbid liquid for preparing magnesium building materials includes the following steps:

[0026] 1) Dry mixing of raw materials: Weigh lightly burned magnesia powder, steel slag powder, wood chips, and straw, put them into a mixer at 80-100 rpm for dry mixing, and control the dry mixing time to 2 minutes;

[0027] 2) Solution preparation: mix magnesium sulfate with water and turbid solution for 2 minutes to obtain a magnesium sulfate solution; then add additives citric acid and phosphoric acid to the magnesium sulfate solution, and fully stir for 2 minutes to obtain a solution;

[0028] 3) Solid-liquid mixing: Add the dry mixture prepared in step 1...

Embodiment 2

[0034] The raw materials for preparing the formula are: 100g of light-burned magnesium oxide powder, 65g of desulfurization turbid liquid, 65g of magnesium sulfate heptahydrate, 30g of steel slag powder, 15g of sawdust, 5g of straw, and 2g of citric acid.

[0035] Embodiment 2 A kind of magnesium-based desulfurization turbid liquid prepares the preparation process of magnesium building material product with embodiment 1.

[0036] The product inspection results are shown in Table 2:

[0037] Table 2

[0038]

Embodiment 3

[0040] The raw materials for preparing the formula are: 100g of light-burned magnesium oxide, 55g of magnesium sulfate heptahydrate, 75g of desulfurization turbid liquid, 30g of steel slag powder, 15g of sawdust, 5g of straw, and 2g of citric acid.

[0041] Example 3 The preparation process of a magnesium-based desulfurization turbid liquid to prepare magnesium building materials is the same as that of Example 1.

[0042] The product inspection results are shown in Table 3:

[0043] table 3

[0044]

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Abstract

The invention relates to the technical field of building material production, in particular to a method for preparing a magnesium building material product from magnesium-based desulfurization turbid liquid, which is characterized in that the magnesium building material product is prepared from the following raw materials in parts by weight: light calcined magnesia powder, desulfurization turbid liquid, magnesium sulfate, an admixture, sawdust, straw and an additive. The desulfurization turbid liquid is a magnesium-process flue gas desulfurization product of a coal-fired power plant. The method has the following beneficial effects: 1) resource utilization of wastes is realized, economic benefits are brought to enterprises, and pollution is reduced; 2) the product has the advantages of light weight, high strength, good fluidity, high fireproof grade and the like; 3) the 28-day compressive strength of the magnesium building material product is greater than 60MPa, the 28-day breaking strength is greater than 11MPa, and the softening coefficient after the magnesium building material product is soaked in water for 28 days is greater than 0.75; 4) the desulfurized turbid liquid does not need to be precipitated, dehydrated, slag-formed and ground and is directly pulped and utilized, the preparation cost is low; and 5) the magnesium building material product does not have the processes of sintering and steam curing, does not generate powder and dust, and is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of building material production, in particular to a method for preparing magnesium building material products from a magnesium-based desulfurized turbid liquid, which uses the desulfurized turbid liquid as a basic raw material to synthesize required magnesium building material products. Background technique [0002] Traditional magnesium building materials are made of high-quality light-burned magnesia powder, magnesium sulfate heptahydrate, admixtures, and admixtures, which are mixed and formed into products, and the process is relatively simple. Magnesium flue gas desulfurization is composed of light-burned magnesium oxide powder and SO in flue gas 2 Countercurrent reaction to absorb SO 2 Magnesium sulfite is generated, and magnesium sulfite is reacted to generate magnesium sulfate by gas explosion process. A large amount of turbid liquid will be produced during pulping, circulation and reaction. As the r...

Claims

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Application Information

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IPC IPC(8): C04B28/30C04B22/14C04B111/28C04B111/40
CPCC04B28/30C04B22/142C04B2111/40C04B2111/28C04B2201/52C04B2201/50C04B14/304C04B18/24C04B18/26C04B18/142C04B22/165C04B24/06
Inventor 毕万利孙明晶关岩陈啸洋孙美硕
Owner 辽宁科大中驰镁建材科技有限公司
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