Coagulating agent special for type gypsum and preparation method thereof

A coagulant and gypsum technology, which is applied in the field of building material production and processing, can solve problems such as shortening the initial and final setting time, and achieve the effects of shortening the initial and final setting time, saving construction costs, and simple construction

Pending Publication Date: 2022-03-08
GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, in the use of a-type gypsum building material products, coagulation accelerators are mixed in different proportions, and the initial and final coagulation time is shortened with the same water consumption, and the initial and final coagulation time is advanced by 8~ without changing the water consumption of the original powder. About 9 minutes, and the construction is simple, the strength is improved, the construction cost is saved, the product quality is improved, and the problem of "waiting" in the construction process is solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A coagulant specially used for A-type gypsum is made of the following raw materials in parts by weight: 280 parts of potassium sulfate, 90 parts of anhydrous gypsum, and 90 parts of polycarboxylate superplasticizer.

[0033] Further, the specific surface area of ​​the anhydrite is 3000cm 2 / g; the attached water content of the anhydrite is 15wt.%; the polycarboxylate water reducer is a polyether water reducer grafted with maleic anhydride as the main chain with different side chain lengths.

[0034] A kind of preparation method that is specially used in the coagulant of A-type gypsum, comprises the following steps:

[0035] (1) take potassium sulfate by weight and dry, then use planetary ball mill to carry out ball milling, obtain potassium sulfate fine powder;

[0036] The drying temperature is 50°C, the time is 85min; the frequency of the planetary ball mill ball mill is 400Hz, the time is 25min, and the temperature is 40°C;

[0037] (2) taking anhydrous gypsum by w...

Embodiment 2

[0041] A coagulant specially used for A-type gypsum is made of the following raw materials in parts by weight: 320 parts of potassium sulfate, 110 parts of anhydrous gypsum, and 110 parts of polycarboxylate superplasticizer.

[0042] Further, the specific surface area of ​​the anhydrite is 4000cm 2 / g; the attached water content of the anhydrite is 20wt.%; the polycarboxylate water reducer is a polyether water reducer grafted with maleic anhydride as the main chain with different side chain lengths.

[0043] A kind of preparation method that is specially used in the coagulant of A-type gypsum, comprises the following steps:

[0044] (1) take potassium sulfate by weight and dry, then use planetary ball mill to carry out ball milling, obtain potassium sulfate fine powder;

[0045] The drying temperature is 55°C, the time is 95min; the frequency of the planetary ball mill ball mill is 430Hz, the time is 28min, and the temperature is 50°C;

[0046] (2) taking anhydrous gypsum by...

Embodiment 3

[0050] A coagulant specially used for a-type gypsum is made of the following raw materials in parts by weight: 290 parts of potassium sulfate, 905 parts of anhydrous gypsum, and 95 parts of polycarboxylate superplasticizer.

[0051] Further, the specific surface area of ​​the anhydrous gypsum is 3200cm 2 / g; the attached water content of the anhydrite is 16wt.%; the polycarboxylate water reducer is a polyether water reducer grafted with maleic anhydride as the main chain with different side chain lengths.

[0052] A kind of preparation method that is specially used in the coagulant of A-type gypsum, comprises the following steps:

[0053] (1) take potassium sulfate by weight and dry, then use planetary ball mill to carry out ball milling, obtain potassium sulfate fine powder;

[0054] The drying temperature is 51°C, the time is 88min; the frequency of the planetary ball mill ball mill is 410Hz, the time is 26min, and the temperature is 41°C;

[0055] (2) taking anhydrous gyp...

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Abstract

The invention discloses a special coagulant for a-type gypsum and a preparation method of the special coagulant. The special coagulant is prepared from the following raw materials in parts by weight: 280-320 parts of potassium sulfate, 90-110 parts of anhydrite and 90-110 parts of a polycarboxylate superplasticizer. According to the present invention, in the use of the type a gypsum building material product, the coagulation accelerator is doped according to different ratios, the same water consumption is used, the initial setting time and the final setting time are shortened, the water consumption of the raw powder is not changed, the initial setting time and the final setting time are advanced by about 8-9 min, the construction is simple, the strength is improved, the construction cost is saved, the product quality is improved, and the problems of "etc." in the construction process are solved.

Description

technical field [0001] The invention belongs to the technical field of production and processing of building materials, and in particular relates to a coagulant specially used for A-type gypsum and a preparation method thereof. Background technique [0002] In order to shorten the setting time when preparing type A gypsum and improve production efficiency, coagulants are generally added to the production line. However, the setting time of gypsum itself often cannot meet the demand, and the factory needs to add a coagulant to make the gypsum set as soon as possible to meet the production demand. At present, there are many kinds of coagulation accelerators available for factories to choose, such as potassium sulfate, waste boards or leftovers from ball milling. Although these coagulation accelerators have certain coagulation-accelerating effects, they also have certain shortcomings. If the amount of potassium sulfate is too much, a large amount of potassium ions will be intro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/10
CPCC04B40/0039C04B2103/10C04B22/147C04B22/143C04B24/32
Inventor 张燕朱国飞徐韦洪李贵汶陈忠华杨永彬杨步雷刘小成付春红姚孟林张启卫彭步平宋维相韦明志王琴何珍施辉朝宋科生王虎才罗进峰杨明徐虎杨恭虎米林王志发王秋桦
Owner GUIZHOU KAILIN PHOSPHOGYPSUM INTEGRATION UTILIZATION
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