阅读说明：本技术 一种无机防火基板及其制作方法 (Inorganic fireproof substrate and manufacturing method thereof ) 是由 江疆 魏雄 蒋妍 韩庆智 于 2021-09-27 设计创作，主要内容包括：本发明公开一种无机防火基板及其制作方法,包括以下重量份组分：氧化镁130-200份,氯化镁50-80份,膨胀蛭石30-50份,硅藻土15-40份,粉煤灰20-30份,竹纤维20-40份,负离子粉10-20份,耐碱玻纤布8-15份,发泡剂5-10份,早强剂3-5份,减水剂3-5份,水40-60份。本发明的无机防火基板具有成本低,强度高、材轻质、低碱、抗水、耐高温、不锈蚀钢筋等优势,非常适于制作防火板材,耐火装饰材料,同时本发明无机防火基板添加了硅藻土和负离子粉,可以吸收室内有害气体,缓慢释放负氧离子,健康环保。(The invention discloses an inorganic fireproof substrate and a manufacturing method thereof, wherein the inorganic fireproof substrate comprises the following components in parts by weight: 200 parts of magnesium oxide 130-containing material, 50-80 parts of magnesium chloride, 30-50 parts of expanded vermiculite, 15-40 parts of diatomite, 20-30 parts of fly ash, 20-40 parts of bamboo fiber, 10-20 parts of anion powder, 8-15 parts of alkali-resistant glass fiber cloth, 5-10 parts of foaming agent, 3-5 parts of early strength agent, 3-5 parts of water reducing agent and 40-60 parts of water. The inorganic fireproof substrate has the advantages of low cost, high strength, light weight, low alkali, water resistance, high temperature resistance, stainless steel bars and the like, is very suitable for manufacturing fireproof plates and fireproof decoration materials, can absorb indoor harmful gas and slowly release negative oxygen ions by adding diatomite and negative ion powder, and is healthy and environment-friendly.)

1. An inorganic fireproof substrate is characterized by comprising the following components in parts by weight: 200 parts of magnesium oxide 130-containing material, 50-80 parts of magnesium chloride, 30-50 parts of expanded vermiculite, 15-40 parts of diatomite, 20-30 parts of fly ash, 20-40 parts of bamboo fiber, 10-20 parts of anion powder, 8-15 parts of alkali-resistant glass fiber cloth, 5-10 parts of foaming agent, 3-5 parts of early strength agent, 3-5 parts of water reducing agent and 40-60 parts of water.

2.The inorganic fire-resistant substrate according to claim 1, wherein the magnesium oxide is light-burned magnesium oxide, and the magnesium oxide contains 86.26 wt% of MgO and SO₂6.04wt％、CaO 1.12wt％、Al₂O₃0.48wt％、Fe₂O₃0.34 wt%, and the balance unavoidable impurities.

3. The inorganic fireproof substrate according to claim 1, wherein the magnesium chloride is a mixture of anhydrous magnesium chloride and magnesium chloride hexahydrate in a mass ratio of 1-2: 1.

4. The inorganic fireproof substrate according to claim 1, wherein the bamboo fiber is a modified bamboo fiber, the silane coupling agent is dissolved in absolute ethanol, the bamboo fiber is added in a water bath at 40-80 ℃, the mixture is uniformly stirred for 3-5h, and the modified bamboo fiber is obtained through vacuum drying.

5. The inorganic fireproof substrate according to claim 1, wherein the foaming agent is melamine, pentaerythritol and ammonium polyphosphate mixed in a mass ratio of 2-4:2: 1.

6. A method of making an inorganic fire-barrier substrate according to any one of claims 1 to 5, comprising the steps of:

(1) adding magnesium oxide, magnesium chloride and foaming agent into a stirrer, stirring, simultaneously filling gas into the stirrer to form bubbles, and stirring for 10-20 min;

(2) adding expanded vermiculite, fly ash, diatomite, bamboo fiber and anion powder into a stirrer, continuously stirring and mixing, and uniformly stirring to prepare slurry;

(3) then introducing the prepared template into a press, and laying the alkali-resistant glass fiber cloth;

(4) adding the slurry obtained in the step (2) into a charging hopper of a press, then filling the slurry into template alkali-resistant glass fiber cloth, pressing to a required size, and demolding after drying for 8-10 h;

(5) stacking the formed plates together, steaming for 3-5h, and then putting the product into a dry room for 8-10 d.

Technical Field

The invention relates to the field of inorganic fireproof substrates and a manufacturing method thereof.

Background

The glass-magnesium fireproof board is one of the most widely used fireproof boards at present, and is a novel non-combustible building board compounded by taking a magnesite cementing material as a base material, taking medium-alkali glass fiber cloth as a reinforcing material and taking a light material as a filler. Can be used as a heat-insulating building wallboard, a door core board, a ceiling board, a packing box and the like, and can replace wood plywood to be used as a dado, a door and window frame, furniture and the like. The surface of the plate can be coated with ready-mixed paint and clear water paint according to the requirement and can be processed into various plate surfaces. It can also be used for simple fireproof engineering in damp environments such as basement and mine.

In the prior art, the magnesite cementing material used for manufacturing the glass magnesium fireproof plate is mainly magnesium oxychloride cement, and the magnesium oxychloride cement is an air-hardening cementing material prepared by reasonably proportioning magnesium oxide, magnesium chloride and water and modifying by adopting an additive, and has the characteristics of light weight and high strength. But the defect of poor waterproof performance is obvious, and the surface of the material can return halogen, return frost, warp and deform in high-humidity weather, so that the strength of the product is reduced, the decorative performance and the application range of the material are seriously influenced, and the service life of the product is shortened.

Disclosure of Invention

In order to solve the defects mentioned in the background art, the invention aims to provide an inorganic fireproof substrate and a manufacturing method thereof.

The purpose of the invention can be realized by the following technical scheme:

an inorganic fireproof substrate comprises the following components in parts by weight: 200 parts of magnesium oxide 130-containing material, 50-80 parts of magnesium chloride, 30-50 parts of expanded vermiculite, 15-40 parts of diatomite, 20-30 parts of fly ash, 20-40 parts of bamboo fiber, 10-20 parts of anion powder, 8-15 parts of alkali-resistant glass fiber cloth, 5-10 parts of foaming agent, 3-5 parts of early strength agent, 3-5 parts of water reducing agent and 40-60 parts of water.

More preferably, the magnesium oxide is light-burned magnesium oxide, and the magnesium oxide comprises 86.26 wt% of MgO and SO₂6.04wt％、CaO 1.12wt％、Al₂O₃ 0.48wt％、Fe₂O₃0.34 wt%, and the balance unavoidable impurities.

Further preferably, the magnesium chloride is anhydrous magnesium chloride and magnesium chloride hexahydrate mixed in a mass ratio of 1-2: 1.

Preferably, the bamboo fiber is modified bamboo fiber, the silane coupling agent is dissolved in absolute ethyl alcohol, the bamboo fiber is added into water bath at 40-80 ℃, the mixture is uniformly stirred for 3-5h, and the modified bamboo fiber is obtained after vacuum drying.

Further preferably, the foaming agent is melamine, pentaerythritol and ammonium polyphosphate mixed according to the mass ratio of 2-4:2: 1.

A manufacturing method of an inorganic fireproof substrate comprises the following steps:

(1) adding magnesium oxide, magnesium chloride and foaming agent into a stirrer, stirring, filling gas into the stirrer to form bubbles, and stirring for 10-20 min;

(2) adding expanded vermiculite, fly ash, diatomite, bamboo fiber and anion powder into a stirrer, continuously stirring and mixing, and uniformly stirring to prepare slurry;

(3) then introducing the prepared template into a press, and laying the alkali-resistant glass fiber cloth;

(4) adding the slurry obtained in the step (2) into a charging hopper of a press, then filling the slurry into template alkali-resistant glass fiber cloth, pressing to a required size, and demolding after drying for 8-10 h;

(5) stacking the formed plates together, steaming for 3-5h, and then putting the product into a dry room for 8-10 d.

The invention has the beneficial effects that:

the inorganic fireproof substrate has the advantages of low cost, high strength, light weight, low alkali, water resistance, high temperature resistance, stainless steel bars and the like, and is very suitable for manufacturing fireproof plates and fireproof decorative materials. Meanwhile, the diatomite and the negative ion powder are added into the inorganic fireproof substrate, so that indoor harmful gas can be absorbed, negative oxygen ions are slowly released, and the inorganic fireproof substrate is healthy and environment-friendly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

An inorganic fireproof substrate comprises the following components in parts by weight: 165 parts of light-burned magnesium oxide, 33 parts of anhydrous magnesium chloride, 25 parts of magnesium chloride hexahydrate, 35 parts of expanded vermiculite, 26 parts of diatomite, 25 parts of fly ash, 32 parts of silane modified bamboo fiber, 16 parts of anion powder, 12 parts of alkali-resistant glass fiber cloth, 4 parts of melamine, 2 parts of pentaerythritol, 1 part of ammonium polyphosphate, 3 parts of an early strength agent, 33 parts of a water reducing agent and 55 parts of water.

A manufacturing method of an inorganic fireproof substrate comprises the following steps:

(1) adding magnesium oxide, magnesium chloride and foaming agent into a stirrer, stirring, filling gas into the stirrer to form bubbles, and stirring for 10-20 min;

(2) adding expanded vermiculite, fly ash, diatomite, bamboo fiber and anion powder into a stirrer, continuously stirring and mixing, and uniformly stirring to prepare slurry;

(3) then introducing the prepared template into a press, and laying the alkali-resistant glass fiber cloth;

(4) adding the slurry obtained in the step (2) into a charging hopper of a press, then filling the slurry into template alkali-resistant glass fiber cloth, pressing to a required size, and demolding after drying for 8-10 h;

(5) stacking the formed plates together, steaming for 3-5h, and then putting the product into a dry room for 8-10 d.

Example 2

An inorganic fireproof substrate comprises the following components in parts by weight: 180 parts of light-burned magnesium oxide, 42 parts of anhydrous magnesium chloride, 33 parts of magnesium chloride hexahydrate, 46 parts of expanded vermiculite, 35 parts of diatomite, 27 parts of fly ash, 36 parts of silane modified bamboo fiber, 16 parts of anion powder, 14 parts of alkali-resistant glass fiber cloth, 3 parts of melamine, 2 parts of pentaerythritol, 1 part of ammonium polyphosphate, 4 parts of an early strength agent, 4 parts of a water reducing agent and 60 parts of water.

The method for producing the inorganic fire-resistant substrate was the same as in example 1.

Example 3

An inorganic fireproof substrate comprises the following components in parts by weight: 130 parts of light-burned magnesium oxide, 35 parts of anhydrous magnesium chloride, 20 parts of magnesium chloride hexahydrate, 30 parts of expanded vermiculite, 16 parts of diatomite, 22 parts of fly ash, 20 parts of silane modified bamboo fiber, 10 parts of anion powder, 8-15 parts of alkali-resistant glass fiber cloth, 4 parts of melamine, 2 parts of pentaerythritol, 1 part of ammonium polyphosphate, 3-5 parts of an early strength agent, 3-5 parts of a water reducing agent and 40-60 parts of water.

The method for producing the inorganic fire-resistant substrate was the same as in example 1.

Example 4

An inorganic fireproof substrate comprises the following components in parts by weight: 200 parts of light-burned magnesium oxide, 78 parts of anhydrous magnesium chloride, 48 parts of magnesium chloride hexahydrate, 48 parts of expanded vermiculite, 36 parts of diatomite, 30 parts of fly ash, 40 parts of silane modified bamboo fiber, 18 parts of negative ion powder, 15 parts of alkali-resistant glass fiber cloth, 3 parts of melamine, 2 parts of pentaerythritol, 1 part of ammonium polyphosphate, 5 parts of an early strength agent, 5 parts of a water reducing agent and 42 parts of water.

The method for producing the inorganic fire-resistant substrate was the same as in example 1.

Example 5

An inorganic fireproof substrate comprises the following components in parts by weight: 150 parts of light-burned magnesium oxide, 80 parts of anhydrous magnesium chloride and magnesium chloride hexahydrate, 30 parts of expanded vermiculite, 15 parts of diatomite, 30 parts of fly ash, 20 parts of silane modified bamboo fiber, 20 parts of anion powder, 15 parts of alkali-resistant glass fiber cloth, 4 parts of melamine, 2 parts of pentaerythritol, 1 part of ammonium polyphosphate, 3-5 parts of an early strength agent, 3-5 parts of a water reducing agent and 60 parts of water.

The method for producing the inorganic fire-resistant substrate was the same as in example 1.

Performance detection

The inorganic fireproof substrates prepared in examples 1 to 5 were cut into 100 × 400mm samples, compression tests, bending tests and splitting tensile tests were performed according to the standard of test methods for mechanical properties of general concrete (GB/T50081-2002), and the amount of negative ions released from the samples was measured according to the test method for measuring the amount of air ions induced by the GB/T28628 material and the inorganic fireproof substrates, and the obtained data are shown in table 1 below.

Table 1 inorganic fireproof substrate performance test results

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.