Preparation method of gypsum plaster board

Abstract

The invention discloses a preparation method of a gypsum plaster board, relates to the technical field of gypsum plaster boards, and solves the problems that when the prepared gypsum plaster board is used, external peculiar smell or harmful gas cannot be absorbed, slurry is easy to coagulate during preparation, and the operable time is short. The invention relates to a preparation method of a gypsum plaster board. The gypsum plaster board comprises the following components in percentage by mass: 38-42% of desulfurized gypsum, 18-22% of phosphogypsum, 3-7% of glass fiber, 0.8-1.5% of polyvinyl alcohol, 0.1-0.3% of sulfonated ether, 25-30% of deionized water, 0.4-3% of activated carbon, 0.5-1% of a retarder, 0.1-0.2% of a water reducing agent and 0.1-2% of a foaming agent. Through cooperation of the retarder and the water reducing agent, in the preparation process of the slurry of the gypsum plaster board, the operable time of the slurry can be prolonged through a dual retarding mechanism of the retarder and the water reducing agent, and the situation that subsequent processing is affected due to short operable time caused by rapid coagulation of the slurry is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of paper-faced gypsum boards, in particular to a preparation method of paper-faced gypsum boards. Background Art

[0002] Gypsum board is made from building gypsum as the primary raw material, with appropriate additives and fibers added to form the core, and a specially prepared paperboard as the facing. Gypsum board offers advantages such as light weight, sound and heat insulation, excellent workability, and simple installation. Gypsum board is available in four categories: standard, water-resistant, fire-resistant, and moisture-resistant.

[0003] However, the existing gypsum board is usually unable to absorb external odors or harmful gases when in use, and the slurry is easily condensed during preparation, resulting in a short operating time; therefore, it does not meet the existing needs. In this regard, we propose a method for preparing gypsum board. Summary of the Invention

[0004] The object of the present invention is to provide a method for preparing paper-faced gypsum board to solve the problems proposed in the above background technology that the prepared paper-faced gypsum board is usually unable to absorb external odors or harmful gases when in use, and the slurry is easily condensed during preparation, resulting in a short operating time.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a paper-faced gypsum board, comprising the following components in parts by mass:

[0006] Desulfurization gypsum 38-42%, phosphogypsum 18-22%, glass fiber 3-7%, polyvinyl alcohol 0.8-1.5%, sulfonated ether 0.1-0.3%, deionized water 25-30%, activated carbon 0.4-3%, retarder 0.5-1%, water reducer 0.1-0.2%, foaming agent 0.1-2%.

[0007] Preferably, the following components are included in parts by mass:

[0008] Desulfurized gypsum 40%, phosphogypsum 20%, glass fiber 5%, polyvinyl alcohol 1%, sulfonated ether 0.2%, deionized water 29%, activated carbon 2%, retarder 0.9%, water reducer 0.2%, foaming agent 1.7%.

[0009] Preferably, the foaming agent comprises at least one of the following ingredients: sodium lauryl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate and sodium α-olefin sulfonate.

[0010] Preferably, the water reducing agent comprises at least one of the following components: polycarboxylate ether, sulfonated melamine resin and HSB aliphatic.

[0011] Preferably, the retarder comprises at least one of the following components: hydroxycarboxylic acid and its salt, acrylic acid and its sodium salt, sodium hexametaphosphate and sodium polyphosphate.

[0012] A preparation method of a paper-faced gypsum board comprises the following steps:

[0013] Step A: Pour the desorbed gypsum and phosphogypsum into a mixing device for mixing, and grind them thoroughly in a grinder until the particle size of the mixture is ≤0.15mm;

[0014] Step B: Pour activated carbon, water reducer, retarder, glass fiber, polyvinyl alcohol, sulfonated ether, foaming agent and deionized water into a mixing device, mix them through the mixing device to form a mixed liquid, mix the ground gypsum raw material and the mixed liquid through the mixing device, and stir the mixed gypsum material into a uniform slurry;

[0015] Step C: injecting the stirred slurry between the two layers of face paper and performing a roll forming process on the slurry by a roll pressing device;

[0016] Step D: placing the formed sheet into a drying device and maintaining the ambient temperature at 50-60°C for 1.5 hours, then raising the ambient temperature to 80-90°C and drying again for 2 hours to obtain a finished paper-faced gypsum board;

[0017] Step E: Cut the finished gypsum board into required sizes and apply waterproof coating to the cut edges.

[0018] Preferably, the stirring time of the mixing equipment in step A is 8 to 12 minutes, the stirring speed is 45 to 60 r / min, and the stirring temperature is 0 to 40°C.

[0019] Preferably, the stirring time of the mixing equipment in step B is 10 to 20 minutes, the stirring speed is 60 to 80 r / min, and the stirring temperature is 0 to 40°C.

[0020] Preferably, the rolling pressure of the rolling equipment in step C is 80-140 MPa, and the thickness of the roll-formed plate is 8.4-10.8 mm.

[0021] Compared with the prior art, the preparation method of the present invention has the following beneficial effects:

[0022] 1. The present invention uses a retarder and a water reducer to make the slurry of the paper-faced gypsum board prolong the working time of the slurry during the preparation process through the dual retarding mechanism of the retarder and the water reducer, thereby avoiding the slurry from setting quickly and resulting in a short working time and affecting subsequent processing;

[0023] 2. The present invention adds activated carbon to the slurry so that the paper-faced gypsum board can absorb external odors or harmful gases through the added activated carbon, which can effectively avoid the harmful effects of odors or harmful gases on human health. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A general flow chart for the overall preparation of the present invention;

[0025] Figure 2 The figure is a flow chart of the processing of the paper-faced gypsum board of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] See also Figure 1 and Figure 2 The present invention provides an embodiment: a method for preparing a gypsum board, which comprises the following components in parts by weight:

[0028] Desulfurization gypsum 38-42%, phosphogypsum 18-22%, glass fiber 3-7%, polyvinyl alcohol 0.8-1.5%, sulfonated ether 0.1-0.3%, deionized water 25-30%, activated carbon 0.4-3%, retarder 0.5-1%, water reducer 0.1-0.2%, foaming agent 0.1-2%.

[0029] Preferably, the following components are included in parts by mass:

[0030] Desulfurized gypsum 40%, phosphogypsum 20%, glass fiber 5%, polyvinyl alcohol 1%, sulfonated ether 0.2%, deionized water 29%, activated carbon 2%, retarder 0.9%, water reducer 0.2%, foaming agent 1.7%.

[0031] By adding activated carbon to the slurry, the paper-faced gypsum board can absorb external odors or harmful gases through the added activated carbon, which can effectively avoid the harmful effects of odors or harmful gases on human health.

[0032] Preferably, the foaming agent comprises at least one of the following ingredients: sodium lauryl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate and sodium α-olefin sulfonate.

[0033] Preferably, the water reducing agent comprises at least one of the following components: polycarboxylate ether, sulfonated melamine resin and HSB aliphatic.

[0034] Preferably, the retarder comprises at least one of the following components: hydroxycarboxylic acid and its salt, acrylic acid and its sodium salt, sodium hexametaphosphate and sodium polyphosphate.

[0035] By combining the retarder and the water reducer, the slurry of the paper-faced gypsum board can extend the working time of the slurry during the preparation process through the dual retarding mechanism of the retarder and the water reducer, thereby avoiding the slurry from setting quickly and resulting in a short working time and affecting subsequent processing.

[0036] A preparation method of a paper-faced gypsum board comprises the following steps:

[0037] Step A: Pour the desorbed gypsum and phosphogypsum into a mixing device for mixing, and grind them thoroughly in a grinder until the particle size of the mixture is ≤0.15mm;

[0038] Step B: Pour activated carbon, water reducer, retarder, glass fiber, polyvinyl alcohol, sulfonated ether, foaming agent and deionized water into a mixing device, mix them through the mixing device to form a mixed liquid, mix the ground gypsum raw material and the mixed liquid through the mixing device, and stir the mixed gypsum material into a uniform slurry;

[0039] Step C: injecting the stirred slurry between the two layers of face paper and performing a roll forming process on the slurry by a roll pressing device;

[0040] Step D: placing the formed sheet into a drying device and maintaining the ambient temperature at 50-60°C for 1.5 hours, then raising the ambient temperature to 80-90°C and drying again for 2 hours to obtain a finished paper-faced gypsum board;

[0041] Step E: Cut the finished gypsum board into required sizes and apply waterproof coating to the cut edges.

[0042] Preferably, the stirring time of the mixing equipment in step A is 8 to 12 minutes, the stirring speed is 45 to 60 r / min, and the stirring temperature is 0 to 40°C.

[0043] Preferably, the stirring time of the mixing equipment in step B is 10 to 20 minutes, the stirring speed is 60 to 80 r / min, and the stirring temperature is 0 to 40°C.

[0044] Preferably, the rolling pressure of the rolling equipment in step C is 80-140 MPa, and the thickness of the roll-formed plate is 8.4-10.8 mm.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for preparing a paper-faced gypsum board, characterized in that: It includes the following components in parts by mass: Desulfurization gypsum 38-42%, phosphogypsum 18-22%, glass fiber 3-7%, polyvinyl alcohol 0.8-1.5%, sulfonated ether 0.1-0.3%, deionized water 25-30%, activated carbon 0.4-3%, retarder 0.5-1%, water reducer 0.1-0.2%, foaming agent 0.1-2%.

2. The method for preparing a gypsum board according to claim 1, wherein: It includes the following components in parts by mass: Desulfurized gypsum 40%, phosphogypsum 20%, glass fiber 5%, polyvinyl alcohol 1%, sulfonated ether 0.2%, deionized water 29%, activated carbon 2%, retarder 0.9%, water reducer 0.2%, foaming agent 1.7%.

3. The method for preparing a gypsum board according to claim 2, wherein: The foaming agent comprises at least one of the following ingredients: sodium lauryl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate and sodium α-olefin sulfonate.

4. The method for preparing a gypsum board according to claim 2, characterized in that: The water reducing agent comprises at least one of the following components: polycarboxylate ether, sulfonated melamine resin and HSB aliphatic.

5. The method for preparing a paper-faced gypsum board according to claim 2, characterized in that: The retarder comprises at least one of the following components: hydroxycarboxylic acid and salts thereof, acrylic acid and sodium salt thereof, sodium hexametaphosphate and sodium polyphosphate.

6. A method for preparing a paper-faced gypsum board, characterized in that: The following steps are involved: Step A: Pour the desorbed gypsum and phosphogypsum into a mixing device for mixing, and grind them thoroughly in a grinder until the particle size of the mixture is ≤0.15mm; Step B: Pour activated carbon, water reducer, retarder, glass fiber, polyvinyl alcohol, sulfonated ether, foaming agent and deionized water into a mixing device, mix them through the mixing device to form a mixed liquid, mix the ground gypsum raw material and the mixed liquid through the mixing device, and stir the mixed gypsum material into a uniform slurry; Step C: injecting the stirred slurry between the two layers of face paper and performing a roll forming process on the slurry by a roll pressing device; Step D: placing the formed sheet into a drying device and maintaining the ambient temperature at 50-60°C for 1.5 hours, then raising the ambient temperature to 80-90°C and drying again for 2 hours to obtain a finished paper-faced gypsum board; Step E: Cut the finished gypsum board into required sizes and apply waterproof coating to the cut edges.

7. The method for preparing a paper-faced gypsum board according to claim 6, characterized in that: The stirring time of the mixing equipment in step A is 8 to 12 minutes, the stirring speed is 45 to 60 r / min, and the stirring temperature is 0 to 40°C.

8. The method for preparing a gypsum board according to claim 6, characterized in that: The stirring time of the mixing equipment in step B is 10 to 20 minutes, the stirring speed is 60 to 80 r / min, and the stirring temperature is 0 to 40°C.

9. The method for preparing a paper-faced gypsum board according to claim 6, characterized in that: The rolling pressure of the rolling equipment in step C is 80-140 MPa, and the thickness of the roll-formed plate is 8.4-10.8 mm.

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