WO2019015139A1 - 石膏板促凝剂的添加方法及其制成的石膏板 - Google Patents

石膏板促凝剂的添加方法及其制成的石膏板 Download PDF

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Publication number
WO2019015139A1
WO2019015139A1 PCT/CN2017/106050 CN2017106050W WO2019015139A1 WO 2019015139 A1 WO2019015139 A1 WO 2019015139A1 CN 2017106050 W CN2017106050 W CN 2017106050W WO 2019015139 A1 WO2019015139 A1 WO 2019015139A1
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Prior art keywords
coagulant
water
solution
gypsum board
clinker
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PCT/CN2017/106050
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English (en)
French (fr)
Inventor
李帆
陈红霞
冉秀云
王霞
贾严严
张晓菲
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北新集团建材股份有限公司
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Publication of WO2019015139A1 publication Critical patent/WO2019015139A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/12—Supplying or proportioning liquid ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
    • C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form

Definitions

  • the present application relates to, but is not limited to, a method of adding a gypsum board coagulant and a gypsum board made therefrom.
  • the coagulant used in the production of gypsum board is gypsum or potassium sulfate.
  • the use of a coagulant in the production of gypsum board is to first stir the coagulant and the clinker thoroughly, mix it, and then mix it with water.
  • the applicant has found through extensive research that in the process of adding the coagulant to the existing gypsum board, the coagulant and the clinker are thoroughly stirred and mixed, and then mixed with water, which greatly reduces the fluidity of the slurry. It is necessary to increase the water paste ratio to ensure the fluidity of the slurry, and the addition of excess water requires additional heat to dry it, increasing the production energy consumption per unit of product, resulting in an increase in the production cost of the product.
  • the application provides a gypsum board coagulant adding method and a gypsum board prepared thereof, the gypsum board coagulant adding method enhances the coagulating effect of the coagulant, improves the fluidity of the slurry, and reduces the Cost of production.
  • the present application provides a method for adding a gypsum board coagulant, the method comprising the steps of:
  • the coagulant is mixed with water for the first time, and stirred uniformly to prepare a first accelerator solution
  • the first coagulant solution is pretreated with ultrasonic waves, the frequency of the ultrasonic waves being 80 Hz to 120 Hz;
  • the second coagulant solution after ultrasonic pretreatment is mixed with water for a second time to obtain a second coagulant solution
  • the pretreatment time may be from 1 minute to 15 minutes.
  • the mass ratio of the coagulant to the water may be 1:10 to 1:20.
  • the coagulant is raw gypsum, and the mass ratio of the raw gypsum to the water is 1:10 to 1:20.
  • the mass ratio of the first coagulant solution after the ultrasonic pretreatment to the water may be 1:2 to 1:15.
  • the mass ratio of the first coagulant solution after the ultrasonic pretreatment to the water is 1:2 to 1:10.
  • the ratio of the time of the pretreatment to the volume of the first coagulant solution is a constant k, and the value of the constant k may be 0.05 min / ml to 0.5 min / ml. Based on the constant k, the ultrasonic pretreatment time required for the different volume of the first set accelerator solution is estimated, so that a better dispersion effect is obtained in a shorter ultrasonic pretreatment time.
  • the coagulant may include gypsum, which may have a particle diameter of less than 0.01 mm and a specific surface area of 20,000 cm 2 /g to 30,000 cm 2 /g.
  • the mass ratio of the second coagulant solution to the clinker may be 1:1.11 to 1:1.67.
  • the coagulant In the pretreatment step of the first coagulant by ultrasonic waves, the coagulant is uniformly dispersed in water by an ultrasonic device to form the first coagulant solution.
  • the present application provides a gypsum board prepared by the method of adding a coagulant according to any of the above.
  • the raw material for preparing the gypsum board may include one or more of a coagulant, clinker, and optionally a binder, a water reducing agent, and a foaming agent.
  • the amount of the coagulant may be 0.1 parts by weight in terms of 100 parts by weight of the clinker, and the amount of the binder may be
  • the weight of the water reducing agent may be in the range of 0.1 to 0.6 by weight in the range of 0.4 to 1
  • the amount of the blowing agent may be in the range of 0.1 to 1.
  • the coagulant may be raw gypsum.
  • the clinker may be plaster of Paris.
  • the binder may be selected from any one or more of the original starch, the modified corn starch, and the modified tapioca starch.
  • the water reducing agent may be selected from any one or more of a polycarboxylic acid type water reducing agent and a naphthalene type water reducing agent.
  • the blowing agent may be selected from any one or more of surfactants.
  • the blowing agent is selected from any one or more of sodium lauryl sulfate and a fatty acid blowing agent.
  • the first coagulant solution is ultrasonically pretreated, and then mixed with the clinker, the addition method not only improves the coagulation effect of the gypsum, but also Improve the fluidity of the slurry and reduce the production cost.
  • the water paste ratio is about 0.6 to 0.9 in the production of gypsum board, the amount of water is large. If the coagulant is directly added to the water, the coagulant solution needs to be treated for a long time according to the ultrasonic pretreatment constant k, thereby increasing the production cost. Therefore, in the present application, the coagulant is mixed with a part of water for the first time, and after ultrasonic pretreatment, the second mixing with the remaining water is performed, the ultrasonic pretreatment time is shortened, and the production cost is reduced.
  • the present application provides a method for adding a gypsum board coagulant, the method comprising the following steps Step:
  • the coagulant is mixed with water for the first time, and stirred uniformly to prepare a first accelerator solution
  • the first coagulant solution is pretreated with ultrasonic waves, the frequency of the ultrasonic waves being 80 Hz to 120 Hz;
  • the second coagulant solution after ultrasonic pretreatment is mixed with water for a second time to obtain a second coagulant solution
  • the pretreatment time may be from 1 minute to 15 minutes.
  • the mass ratio of the coagulant to the water may be 1:10 to 1:20, optionally the coagulant is raw gypsum, The mass ratio of the raw gypsum to the water is from 1:10 to 1:20.
  • the mass ratio of the first coagulant solution after the ultrasonic pretreatment to the water may be 1:2 to 1:15.
  • the mass ratio of the first coagulant solution after the ultrasonic pretreatment to the water is 1:2 to 1:10.
  • the ratio of the time of the pretreatment to the volume of the first coagulant solution is a constant k, and the value of the constant k may be 0.05 min / ml to 0.5 min / ml.
  • the coagulant may include gypsum, which may have a particle diameter of less than 0.01 mm and a specific surface area of 20,000 cm 2 /g to 30,000 cm 2 /g.
  • the mass ratio of the second coagulant solution to the clinker may be 1:1.11 to 1:1.67.
  • the coagulant In the pretreatment step of the first coagulant by ultrasonic waves, the coagulant is uniformly dispersed in water by an ultrasonic device to form the first coagulant solution.
  • the present application provides a gypsum board made by the method of adding a coagulant as described above.
  • the raw material for preparing the gypsum board may include one or more of a coagulant, clinker, and optionally a binder, a water reducing agent, and a foaming agent.
  • the amount of the coagulant may be 0.1 parts by weight in terms of 100 parts by weight of the clinker, and the amount of the binder may be
  • the weight of the water reducing agent may be in the range of 0.1 to 0.6 by weight in the range of 0.4 to 1
  • the amount of the blowing agent may be in the range of 0.1 to 1.
  • the coagulant may be raw gypsum.
  • the clinker may be plaster of Paris.
  • the binder may be selected from any one or more of the original starch, the modified corn starch, and the modified tapioca starch.
  • the water reducing agent may be selected from any one or more of a polycarboxylic acid type water reducing agent and a naphthalene type water reducing agent.
  • the blowing agent may be selected from any one or more of surfactants.
  • the blowing agent is selected from any one or more of sodium lauryl sulfate and a fatty acid blowing agent.
  • the coagulant, clinker, binder, water reducing agent and foaming agent used in the gypsum board raw material are not limited to the specific materials listed above, and materials capable of realizing the action of various reagents can be used. In the preparation of the gypsum board of the present application, the specific materials listed above do not make any form or substantial limitation to the application.
  • the coagulant mainly used in the production of gypsum board is gypsum or potassium sulfate.
  • gypsum the coagulant mainly used in the production of gypsum board
  • potassium sulfate the amount of addition is more, which tends to cause the brittleness of the sheet to increase, the fracture load strength of the gypsum board is reduced, the bonding performance is lowered, and the product quality is affected.
  • Ground gypsum is used as a coagulant.
  • the coagulant of the present application does not refer solely to gypsum or potassium sulphate, and other coagulants capable of acting as a coagulant in the production of gypsum board are also included within the scope of the present application.
  • the coagulant is ground gypsum having a particle size of less than 0.01 mm, and the specific surface area of the coagulant was measured by BET. The result was 24,004 cm 2 /g, and the source was made by grinding Ninghai Gypsum.
  • the source of clinker is the calcined gypsum which is slowly calcined from Ninghai gypsum.
  • Ultrasonic waves are emitted by the KQ2200DE CNC ultrasonic cleaner.
  • the standard GB/T 17669.4-1999 is used to determine the initial setting and final setting time of the clinker.
  • a method for adding a gypsum board coagulant comprises the following steps:
  • Ultrasonic treatment of the first coagulant solution the treatment time is 1 minute, the frequency of the ultrasonic wave is 120 Hz;
  • the second coagulant solution described above was mixed with 200 g of clinker, 1.4 g of a binder, 1 g of a water reducing agent, and 1 g of a foaming agent, and finally coagulated, wherein the clinker was a plaster of Paris.
  • a gypsum board prepared by the above-mentioned gypsum board coagulant addition method was obtained, which comprises the following raw materials: coagulant 1 g, clinker 200 g, binder 1.4 g, water reducing agent 1 g, and foaming agent 1 g.
  • a method for adding a gypsum board coagulant comprises the following steps:
  • Ultrasonic treatment of the first coagulant solution the treatment time is 1 minute, the frequency of the ultrasonic wave is 80 Hz;
  • the second coagulant solution obtained above was mixed with 200 g of clinker, 1.4 g of a binder, 1 g of a water reducing agent, and 1 g of a foaming agent, and finally coagulated, wherein the clinker was gypsum.
  • a gypsum board prepared by the above method for adding a gypsum board coagulant comprising the following Amount of raw materials: 1 g of coagulant, 200 g of clinker, 1.4 g of binder, 1 g of water reducing agent, and 1 g of foaming agent.
  • a method for adding a gypsum board coagulant comprises the following steps:
  • Ultrasonic treatment of the first coagulant solution the treatment time is 5 minutes, the frequency of the ultrasonic wave is 100 Hz;
  • the second coagulant solution obtained above was mixed with 200 g of clinker, 1.4 g of a binder, 1 g of a water reducing agent, and 1 g of a foaming agent, and finally coagulated, wherein the clinker was gypsum.
  • a gypsum board prepared by the above-mentioned gypsum board coagulant addition method was obtained, which comprises the following raw materials: coagulant 1 g, clinker 200 g, binder 1.4 g, water reducing agent 1 g, and foaming agent 1 g.
  • a method for adding a gypsum board coagulant comprises the following steps:
  • the first coagulant solution is pretreated by ultrasonic wave, the treatment time is 10 minutes, and the frequency of the ultrasonic wave is 120 Hz;
  • the second coagulant solution was mixed with 200 g of clinker, 1.4 g of a binder, 1 g of a water reducing agent, and 1 g of a foaming agent, and finally coagulated, wherein the clinker was plaster.
  • a gypsum board prepared by the above-mentioned gypsum board coagulant addition method was obtained, which comprises the following raw materials: coagulant 1 g, clinker 200 g, binder 1.4 g, water reducing agent 1 g, and foaming agent 1 g.
  • the pretreated pre-coagulant solution is mixed with 110 g of water to obtain a second coagulant solution; the second coagulant solution described above is combined with 200 g of clinker, 1.4 g of binder, 1 g of water reducing agent, and 1 g of hair.
  • final setting is carried out, wherein the clinker is a plaster of Paris.
  • a gypsum board prepared by the above-mentioned gypsum board coagulant addition method was obtained, which comprises the following raw materials: coagulant 1 g, clinker 200 g, binder 1.4 g, water reducing agent 1 g, and foaming agent 1 g.
  • the pretreated pre-coagulant solution is mixed with 110 g of water to obtain a second coagulant solution; the second coagulant solution described above is combined with 200 g of clinker, 1.4 g of binder, 1 g of water reducing agent, and 1 g of hair.
  • final setting is carried out, wherein the clinker is a plaster of Paris.
  • a gypsum board prepared by the above-mentioned gypsum board coagulant addition method was obtained, which comprises the following raw materials: coagulant 1 g, clinker 200 g, binder 1.4 g, water reducing agent 1 g, and foaming agent 1 g.
  • the coagulation effect is close, and it can be seen that the length of the ultrasonic treatment has little effect on the coagulation effect of the coagulant in a suitable treatment time range; the control example 2 and the control example 3 use the ultrasonic power of 30 Hz, The initial setting time and the final setting time of the slurry are significantly longer than those of the first embodiment and the fourth embodiment of the present application. It can be seen that the ultrasonic power has a great influence on the coagulation effect of the coagulant. When the ultrasonic pretreatment time is the same, Larger power has a better coagulation effect in the range of suitable ultrasonic power.
  • Example 2 The initial setting and final setting time of the slurry prepared in Example 2 and Example 3 of the present application were determined according to the method specified in the standard GB/T 17669.4-1999, and the measurement results are shown in Table 2:
  • the inventors of the present application found in the actual production that the ultrasonic treatment time should not be too short or too long, and the ultrasonic treatment time is too short to allow the coagulant to be evenly distributed, and the treatment time is too long, and the coagulation effect is not significantly improved.
  • the ultrasonic pretreatment time is related to the volume of the first accelerator solution, When the ratio of the ultrasonic pretreatment time to the volume of the first accelerator solution is 0.05 minutes/ml to 0.5 minutes/ml, the ultrasonic frequency is not too low, and the ultrasonic frequency is too low, which seriously affects the coagulation effect.
  • the ultrasonic frequency is preferably from 80 Hz to 120 Hz.
  • the method for adding the gypsum board coagulant provided by the application can enhance the coagulation effect of the coagulant, improve the fluidity of the slurry for producing the gypsum board, and reduce the production cost of the gypsum board.
  • the gypsum board can be effectively produced by this method.

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Abstract

一种石膏板促凝剂的添加方法以及使用该方法制成的石膏板，该方法包括如下步骤：将促凝剂与水进行第一次混合，搅拌均匀，制成第一促凝剂溶液；采用超声波对第一促凝剂溶液进行预处理，该超声波的频率为80Hz至120Hz；将超声波预处理后的第一促凝剂溶液与水进行第二次混合，制成第二促凝剂溶液；将第二促凝剂溶液与熟料混合后，进行终凝。

Description

石膏板促凝剂的添加方法及其制成的石膏板 技术领域
本申请涉及但不限于一种石膏板促凝剂的添加方法及其制成的石膏板。
背景
石膏板生产中主要应用的促凝剂为生石膏或硫酸钾等。目前石膏板生产中促凝剂的使用，是先将促凝剂与熟料充分搅拌，混合，再与水混合。
发明概述
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
申请人经过大量研究发现，在现有的生产石膏板添加促凝剂的过程中，先将促凝剂与熟料充分搅拌混合，再与水混合，此方法大大降低了料浆的流动性，需要增大水膏比才能保证料浆的流动度，而添加多余的水分就需要额外的热能将其干燥，增加了单位产品的生产能耗，导致产品的生产成本提高。
本申请提供了一种石膏板促凝剂的添加方法及其制成的石膏板，该石膏板促凝剂的添加方法增强了促凝剂的促凝效果，提高了料浆流动性，降低了生产成本。
第一方面，本申请提供了一种石膏板促凝剂的添加方法，所述方法包括如下步骤：
将促凝剂与水进行第一次混合，搅拌均匀，制成第一促凝剂溶液；
采用超声波对所述第一促凝剂溶液进行预处理，所述超声波的频率为80Hz至120Hz；
将超声波预处理后的第一促凝剂溶液与水进行第二次混合，获得第二促凝剂溶液；
将所述第二促凝剂溶液与熟料混合后，进行终凝。
所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间可以为1分钟至15分钟。
所述将促凝剂与水进行第一次混合步骤中，所述促凝剂与所述水的质量比可以为1:10至1:20。
可选地所述促凝剂为生石膏，所述生石膏与所述水的质量比为1:10至1:20。
所述将超声波预处理后的第一促凝剂溶液与水进行第二次混合步骤中，所述超声波预处理后的第一促凝剂溶液与所述水的质量比可以为1:2至1:15。
可选地所述超声波预处理后的第一促凝剂溶液与所述水的质量比为1:2至1:10。
所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间与所述第一促凝剂溶液的体积之比为常量k，所述常量k的值可以为0.05分/毫升至0.5分/毫升。根据该常量k，估算不同体积的第一促凝剂溶液所需的超声波预处理时间，使得在较短的超声波预处理时间内，获得较好的分散效果。
所述将促凝剂与水进行第一次混合步骤中，所述促凝剂可包括生石膏，所述生石膏的粒径可以小于0.01mm，比表面积可以为20000cm2/g至30000cm2/g。
所述将所述第二促凝剂溶液与熟料混合后，进行终凝步骤中，所述第二促凝剂溶液与所述熟料的质量比可以为1:1.11至1:1.67。
采用超声波对所述第一促凝剂进行预处理步骤中，采用超声波装置使所述促凝剂震荡均匀分散于水中，形成所述第一促凝剂溶液。
第二方面，本申请提供了一种按照如上任一所述的促凝剂的添加方法制成的石膏板。
制备所述石膏板的原料可以包括：促凝剂、熟料以及任选地粘结剂、减水剂和发泡剂中的一种或更多种。
在所述石膏板中，以所述熟料的添量为100重量份计，所述促凝剂的添量可以为0.1至1范围内的重量份，所述粘结剂的添量可以为0.4至1范围内的重量份，所述减水剂的添量可以为0.1至0.6范围内的重量份，所述发泡剂的添量可以为0.1至1范围内的重量份。
所述促凝剂可以为生石膏。
所述熟料可以为熟石膏。
所述粘结剂可以选自原淀粉、改性玉米淀粉和改性木薯淀粉中的任意一种或更多种。
所述减水剂可以选自聚羧酸类减水剂和萘系减水剂中的任意一种或更多种。
所述发泡剂可以选自表面活性剂中的任意一种或更多种。
可选地所述发泡剂选自十二烷基硫酸钠和脂肪酸类发泡剂中的任意一种或更多种。在本申请涉及的石膏板促凝剂的添加方法中，对第一促凝剂溶液进行了超声波预处理后，再将其与熟料混合，该添加方法不仅提高了生石膏的促凝效果，还提高了料浆的流动性，降低了生产成本。
由于在石膏板生产中，水膏比约为0.6～0.9，水的用量较大。若将促凝剂直接加入水中，根据超声波预处理常数k，需长时间处理促凝剂溶液，增加生产成本。故本申请将促凝剂与部分水进行第一次混合，采用超声波预处理后，再与剩余水进行第二次混合，缩短超声波预处理的时间，降低了生产成本。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得更加清楚，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书中所特别指出的结构来实现和获得。
详细描述
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
本申请提供了一种石膏板促凝剂的添加方法，所述方法包括如下步 骤：
将促凝剂与水进行第一次混合，搅拌均匀，制成第一促凝剂溶液；
采用超声波对所述第一促凝剂溶液进行预处理，所述超声波的频率为80Hz至120Hz；
将超声波预处理后的第一促凝剂溶液与水进行第二次混合，获得第二促凝剂溶液；
将所述第二促凝剂溶液与熟料混合后，进行终凝。
所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间可以为1分钟至15分钟。
所述将促凝剂与水进行第一次混合步骤中，所述促凝剂与所述水的质量比可以为1:10至1:20，可选地所述促凝剂为生石膏，所述生石膏与所述水的质量比为1:10至1:20。
所述将超声波预处理后的第一促凝剂溶液与水进行第二次混合步骤中，所述超声波预处理后的第一促凝剂溶液与所述水的质量比可以为1:2至1:15。
可选地所述超声波预处理后的第一促凝剂溶液与所述水的质量比为1:2至1:10。
所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间与所述第一促凝剂溶液的体积之比为常量k，所述常量k的值可以为0.05分/毫升至0.5分/毫升。
所述将促凝剂与水进行第一次混合步骤中，所述促凝剂可包括生石膏，所述生石膏的粒径可以小于0.01mm，比表面积可以为20000cm2/g至30000cm2/g。
所述将所述第二促凝剂溶液与熟料混合后，进行终凝步骤中，所述第二促凝剂溶液与所述熟料的质量比可以为1:1.11至1:1.67。
采用超声波对所述第一促凝剂进行预处理步骤中，采用超声波装置使所述促凝剂震荡均匀分散于水中，形成所述第一促凝剂溶液。
另一方面，本申请提供了一种按照如上任一所述的促凝剂的添加方法制成的石膏板。
制备所述石膏板的原料可以包括：促凝剂、熟料以及任选地粘结剂、减水剂和发泡剂中的一种或更多种。
在所述石膏板中，以所述熟料的添量为100重量份计，所述促凝剂的添量可以为0.1至1范围内的重量份，所述粘结剂的添量可以为0.4至1范围内的重量份，所述减水剂的添量可以为0.1至0.6范围内的重量份，所述发泡剂的添量可以为0.1至1范围内的重量份。
所述促凝剂可以为生石膏。
所述熟料可以为熟石膏。
所述粘结剂可以选自原淀粉、改性玉米淀粉和改性木薯淀粉中的任意一种或更多种。
所述减水剂可以选自聚羧酸类减水剂和萘系减水剂中的任意一种或更多种。
所述发泡剂可以选自表面活性剂中的任意一种或更多种。
可选地所述发泡剂选自十二烷基硫酸钠和脂肪酸类发泡剂中的任意一种或更多种。
应理解，石膏板原料中使用的促凝剂、熟料、粘结剂、减水剂和发泡剂，并不限于上述所列举的具体材料，能够实现各种试剂的作用的材料均可用于本申请石膏板的制备中，上述所列举的具体材料并非对本申请作出任何形式上或实质上的限定。
例如，石膏板生产中主要应用的促凝剂为生石膏或硫酸钾等。申请人在研究中发现，由于硫酸钾作为促凝剂时，添量较多，容易造成板材脆性增大，使石膏板断裂载荷强度降低，粘结性能降低，影响产品质量，故本申请一般采用磨细的生石膏作为促凝剂。然而，应理解，本申请的促凝剂并不单指生石膏或硫酸钾，能够在石膏板生产中起到促凝剂作用的其他促凝剂也包括在本申请的范围之内。
在下述实施例中，促凝剂为磨细的生石膏，粒径小于0.01mm，采用 BET对促凝剂进行比表面积测定，结果为24004cm2/g，其来源为由宁海生石膏磨细而成。熟料的来源为由宁海石膏慢速煅烧而成的熟石膏。超声波由KQ2200DE型数控超声波清洗器发射。并采用标准GB/T 17669.4-1999去测定熟料的初凝和终凝时间。
实施例1
一种石膏板促凝剂的添加方法，包括如下步骤：
将1g的生石膏加入20g水中，搅拌均匀，制成第一促凝剂溶液；
采用超声波对上述第一促凝剂溶液进行预处理，处理时间为1分钟，超声波的频率为120Hz；
将超声波处理后的第一促凝剂溶液与110g水混合，获得第二促凝剂溶液；
将上述的第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
实施例2
一种石膏板促凝剂的添加方法，包括如下步骤：
将1g的生石膏加入10g水中，搅拌均匀，制成第一促凝剂溶液；
采用超声波对上述第一促凝剂溶液进行预处理，处理时间为1分钟，超声波的频率为80Hz；
将用超声波处理后的第一促凝剂溶液与120g水混合，获得第二促凝剂溶液；
将上述获得的第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质 量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
实施例3
一种石膏板促凝剂的添加方法，包括如下步骤：
将1g的生石膏加入15g水中，搅拌均匀，制成第一促凝剂溶液；
采用超声波对上述第一促凝剂溶液进行预处理，处理时间为5分钟，超声波的频率为100Hz；
将用超声波处理后的第一促凝剂溶液与115g水混合，获得第二促凝剂溶液；
将上述获得的第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
实施例4
一种石膏板促凝剂的添加方法，包括如下步骤：
将1g的生石膏加入20g水中，搅拌均匀，制成第一促凝剂溶液；
采用超声波对上述第一促凝剂溶液进行预处理，处理时间为10分钟，超声波的频率为120Hz；
将超声波处理后的第一促凝剂溶液与110g水混合，获得第二促凝剂溶液；
将上述第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
对照实施例1
制备石膏板过程中，不加入促凝剂，仅选取200g的熟料加入130g水中，进行终凝，其中，熟料为熟石膏。
对照实施例2
将重量为1g的生石膏加入20g水中，搅拌均匀，制成第一促凝剂溶液；采用超声波对上述第一促凝剂溶液进行预处理，处理时间为1分钟，超声波的频率为30Hz；将超声波预处理后的第一促凝剂溶液与110g水混合，获得第二促凝剂溶液；将上述的第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
对照实施例3
将重量为1g的生石膏加入20g水中，搅拌均匀，制成第一促凝剂溶液；采用超声波对上述第一促凝剂溶液进行预处理，处理时间为10分钟，超声波的频率为30Hz；将超声波预处理后的第一促凝剂溶液与110g水混合，获得第二促凝剂溶液；将上述的第二促凝剂溶液与200g熟料、1.4g粘结剂、1g减水剂、1g发泡剂混合后，进行终凝，其中，熟料为熟石膏。
得到一种由上述石膏板促凝剂的添加方法制备的石膏板，包括如下质量的原料：促凝剂1g，熟料200g，粘结剂1.4g，减水剂1g，发泡剂1g。
实验测试：
根据标准GB/T 17669.4-1999中规定的方法测定上述对照实施例1至3与本申请实施例1和4制备的料浆的初凝时间和终凝时间，测定结果如表1所示：
表1初凝和终凝时间测定结果
Figure PCTCN2017106050-appb-000001
由上述测定结果中可以看出，对照实施例1制备的料浆由于没有添加促凝剂，导致料浆的初凝和终凝时间太长，严重影响石膏板的生产效率；本申请的实施例1与实施例4，均采用120Hz的超声波功率，只是实施例1的预处理时间为1分钟，实施例4的预处理时间为10分钟，但是都缩短了料浆的初凝和终凝时间，且促凝效果接近，由此可知，在适宜的处理时间范围内，超声波处理时间长短对促凝剂的促凝效果的影响不大；对照实施例2与对照实施例3采用30Hz的超声波功率，料浆的初凝时间和终凝时间明显长于本申请的实施例1与实施例4，由此可知，超声波功率对促凝剂的促凝效果的影响较大，当超声波预处理时间相同时，在适宜的超声波功率范围内，较大的功率具有较好的促凝效果。
根据标准GB/T 17669.4-1999中规定的方法测定本申请的实施例2和实施例3制备的料浆的初凝和终凝时间，测定结果如表2所示：
表2实施例2和实施例3测定结果
Figure PCTCN2017106050-appb-000002
由上述测定结果可知，采用本申请实施例2与实施例3的促凝剂添加方法都可以使促凝剂获得较好的促凝效果。
本申请的发明人在实际生产中发现超声波处理时间不宜过短或过长，在过短的超声波处理时间内不足以让促凝剂分布均匀，处理时间过长对促凝效果亦无明显提高，超声波预处理时间与第一促凝剂溶液的体积相关， 当超声波预处理时间与第一促凝剂溶液的体积之比为0.05分/毫升至0.5分/毫升时较为适宜而且，超声波频率不宜过低，超声波频率过低，则严重影响其促凝效果，超声波频率为80Hz至120Hz较为适宜。
本公开内容是本申请实施例的原则的示例，并非对本申请作出任何形式上或实质上的限定，或将本申请限定到具体的实施方案。对本领域的技术人员而言，很显然本申请实施例的技术方案的要素、方法和系统等，可以进行变动、改变、改动、演变，而不背离如上所述的本申请的实施例、技术方案的，如权利要求中所定义的原理、精神和范围。这些变动、改变、改动、演变的实施方案均包括在本申请的等同实施例内，这些等同实施例均包括在本申请的由权利要求界定的范围内。虽然可以许多不同形式来使本申请实施例具体化，但此处详细描述的是本发明的一些实施方案。此外，本申请的实施例包括此处所述的各种实施方案的一些或全部的任意可能的组合，也包括在本申请的由权利要求界定的范围内。在本申请中或在任一个引用的专利、引用的专利申请或其它引用的资料中任何地方所提及的所有专利、专利申请和其它引用资料据此通过引用以其整体并入。
以上公开内容规定为说明性的而不是穷尽性的。对于本领域技术人员来说，本说明书会暗示许多变化和可选择方案。所有这些可选择方案和变化旨在被包括在本权利要求的范围内，其中术语“包括”意思是“包括，但不限于”。
在此完成了对本发明可选择的实施方案的描述。本领域技术人员可认识到此处所述的实施方案的其它等效变换，这些等效变换也为由附于本文的权利要求所包括。
工业实用性
本申请提供的石膏板促凝剂的添加方法可以增强促凝剂的促凝效果，提高生产石膏板的料浆的流动性，降低石膏板的生产成本。通过该方法可有效制成石膏板。

Claims (14)

  1. 一种石膏板促凝剂的添加方法，所述方法包括如下步骤：
    将促凝剂与水进行第一次混合，搅拌均匀，制成第一促凝剂溶液；
    采用超声波对所述第一促凝剂溶液进行预处理，所述超声波的频率为80Hz至120Hz；
    将超声波预处理后的第一促凝剂溶液与水进行第二次混合，制成第二促凝剂溶液；
    将所述第二促凝剂溶液与熟料混合后，进行终凝。
  2. 根据权利要求1所述的促凝剂的添加方法，其中，所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间为1分钟至15分钟。
  3. 根据权利要求1或2所述的促凝剂的添加方法，其中，所述将促凝剂与水进行第一次混合步骤中，所述促凝剂与所述水的质量比为1:10至1:20，可选地所述促凝剂为生石膏，所述生石膏与所述水的质量比为1:10至1:20。
  4. 根据权利要求1至3中任一项所述的促凝剂的添加方法，其中，所述将超声波预处理后的第一促凝剂溶液与水进行第二次混合步骤中，所述超声波预处理后的第一促凝剂溶液与所述水的质量比为1:2至:1:15，可选地为1:2至:1:10。
  5. 根据权利要求1至4中任一项所述的促凝剂的添加方法，其中，所述采用超声波对所述第一促凝剂溶液进行预处理步骤中，所述预处理的时间与所述第一促凝剂溶液的体积之比为常量k，所述常量k的值为0.05分/毫升至0.5分/毫升。
  6. 根据权利要求1至5中任一项所述的促凝剂的添加方法，其中，所述将促凝剂与水进行第一次混合步骤中，所述促凝剂包括生石膏，所述生石膏的粒径小于0.01mm，比表面积为20000cm2/g至30000cm2/g。
  7. 根据权利要求1至6中任一项所述的促凝剂的添加方法，其中，所 述将所述第二促凝剂溶液与熟料混合后，进行终凝步骤中，所述第二促凝剂溶液与所述熟料的质量比为1:1.11至1:1.67。
  8. 根据权利要求1至7中任一项所述的促凝剂的添加方法，其中，所述将所述第二促凝剂溶液与熟料混合后，进行终凝步骤包括：将所述第二促凝剂溶液与熟料、粘结剂、减水剂和发泡剂混合后，进行终凝。
  9. 按照权利要求1至8中任一项所述的促凝剂的添加方法制成的石膏板。
  10. 根据权利要求9所述的石膏板，其中，制备所述石膏板的原料包括：促凝剂、熟料以及任选地粘结剂、减水剂和发泡剂中的一种或更多种。
  11. 根据权利要求10所述的石膏板，其中，以所述熟料的添量为100重量份计，所述促凝剂的添量为0.1至1范围内的重量份，所述粘结剂的添量为0.4至1范围内的重量份，所述减水剂的添量为0.1至0.6范围内的重量份，所述发泡剂的添量为0.1至1范围内的重量份。
  12. 根据权利要求10或11所述的石膏板，其中，所述促凝剂为生石膏。
  13. 根据权利要求10至12中任一项所述的石膏板，其中，所述熟料为熟石膏。
  14. 根据权利要求10至13中任一项所述的石膏板，其中，所述粘结剂选自原淀粉、改性玉米淀粉和改性木薯淀粉中的任意一种或更多种，所述减水剂选自聚羧酸类减水剂和萘系减水剂中的任意一种或更多种，所述发泡剂选自表面活性剂中的任意一种或更多种，可选地选自十二烷基硫酸钠和脂肪酸类发泡剂中的任意一种或更多种。
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