Method for preparing magnesium fireproof plate through low-content light calcined magnesia powder

A light-burned magnesia, low-content technology, applied in the manufacture of tools, ceramic molding machines, molds, etc., can solve the problems of underutilization of light-burned magnesia powder, easy moisture absorption and anti-halogen of products, and impact on ecology, etc., to achieve Good economic benefits, improvement of performance problems, and improvement of production efficiency

Pending Publication Date: 2021-12-24
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

Most of the fireproof boards prepared in the prior art are prepared by magnesium oxychloride gelling system. Due to the particularity of chloride ions, the products are easier to absorb moisture and reverse halogen; low-content light-burned magnesium oxide powder is not fully utilized, which affects the ecology ,create pollution

Method used

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  • Method for preparing magnesium fireproof plate through low-content light calcined magnesia powder
  • Method for preparing magnesium fireproof plate through low-content light calcined magnesia powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw materials for the formula of magnesia fireproof board: 100g of low-content light-burned magnesium oxide powder, 110g of magnesium sulfate solution, 4g of citric acid (modifier), 28g of wood chips (light filler), and 20g of expanded vermiculite (mineral admixture). The preparation method includes the following steps: 1) preparing a static slurry, mixing magnesium oxide and magnesium sulfate solution according to the formula ratio, stirring and mixing at a speed of 70-90 rpm for 2-5 minutes, and then adding a modifier to prepare a pure magnesium oxysulfate slurry ;

[0034] 2) Mixing and stirring: Add all formula quantities of lightweight fillers and mineral admixtures to the magnesium oxysulfide slurry in sequence, refer to GB / T9142-1988 "Technical Conditions for Concrete Mixers", and stir for 4-5 minutes to obtain slurry;

[0035] 3) Forming, spread the uniformly stirred slurry into the mold with one or more layers of medium-alkali glass fiber cloth, after the pavin...

Embodiment 2

[0040]Raw materials for the formula of magnesia fireproof board: 100g of low-content lightly burned magnesia powder, 110g of magnesium sulfate solution, 3g of citric acid (modifier), 26g of sawdust (light filler), and 18g of expanded vermiculite (mineral admixture). The preparation method is the same as in Example 1.

Embodiment 3

[0042] Raw materials for the formula of magnesia fireproof board: 80g of low-content lightly burned magnesia powder, 100g of magnesium sulfate solution, 2.5g of malic acid (modifier), 22g of sawdust (light filler), 20g of fly ash (mineral admixture) . The preparation method is the same as in Example 1.

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Abstract

The invention belongs to the technical field of production of magnesium fireproof plates, and particularly relates to a method for preparing a magnesium fireproof plate through low-content light calcined magnesia powder. The method is characterized in that raw materials comprise a reinforcing material and a coating material attached to the surface of the reinforcing material, and the coating material comprises, by weight, 30-50 parts of the low-content light calcined magnesia powder, 40-60 parts of a magnesium sulfate solution, 2-10 parts of a mineral admixture, 5-15 parts of light filler and 1-2 parts of a modifier; and the reinforcing material is plastic-coated medium-alkali glass fiber cloth, the fireproof plate has the characteristics of being low in dead weight, high in strength, good in toughness, capable of achieving fireproofness and heat insulation, convenient to construct and the like under the chemical action of puffing and intermolecules, the requirements of the fireproof plate for fireproofing, strength, nail-holding power and the like can be ensured, the low cost and high performance of the fireproof plate are realized, meanwhile, the problem about comprehensive application of the low-content light calcined magnesia powder is solved, and the method has far-reaching influence on development of magnesium resources and preparation of magnesium fireproof plates in the future.

Description

technical field [0001] The invention belongs to the production technical field of magnesia fireproof boards, and in particular relates to a method for preparing magnesia fireproof boards with low-content lightly burned magnesia powder. Background technique [0002] According to reports, the fireproof boards currently on the market are prepared by using magnesium as a forming agent, adding fillers, modifiers, etc., which mainly have the advantages of non-toxic, fireproof, light weight, and not easy to deform. , Toughness so that the construction is simple and so on. However, in the prior art, the prepared glass magnesium board has disadvantages such as insufficient strength, high dry shrinkage and wet expansion rate, anti-halogen blooming, etc., and it is difficult to meet the use requirements. [0003] In the existing technology for preparing fireproof boards, Chinese patent CN103922691A discloses a method for preparing fireproof boards. The main filling material is slag, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B7/00B28B7/42B28B7/44B28B3/00C04B28/30C04B111/28
CPCB28B7/0097B28B7/42B28B7/44B28B3/006C04B28/30C04B2111/28C04B2201/50C04B2201/20C04B14/204C04B18/08C04B18/26C04B18/24C04B24/06
Inventor 毕万利王东升刘丹阳关岩孙美硕
Owner 辽宁科大中驰镁建材科技有限公司
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