Ball milling method of gypsum clinker
A technology of gypsum clinker and ball milling, which is applied in the direction of grain processing, etc., and can solve the problems of high water demand for clinker, clinker particle size not meeting the requirements, dehydration of hemihydrate gypsum, etc.
Active Publication Date: 2022-03-01
CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED
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Problems solved by technology
[0002]
In the production of gypsum board, the essential raw material is hemihydrate gypsum. The hemihydrate gypsum after direct calcination cannot be directly used to produce gypsum board, because the clinker at this time is not stable enough, and iron balls are often used in factories. However, the clinker produced by iron ball grinding will also have many problems. If the grinding time is too short, the particle size of the clinker will not meet the requirements, the hydration and coagulation time will be prolonged, and the grinding time will be too long. If it is long, it will also increase the temperature of the material, which will further dehydrate the hemihydrate gypsum, and the content of crystal water will be lower. When such clinker is used to produce gypsum board, it may also increase the water demand of the clinker. clinker agglomeration
Method used
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Embodiment
[0019] In the embodiments, zirconia ball milling media are used for ball milling, and clinker with stable properties is obtained by ball milling the ball milling media with a specified size and a certain ball ratio.
[0020] The ball mill used in this example and the comparative example is a planetary ball mill, model QXQM-2. Embodiment and comparative example gypsum clinker treatment process conditions are as shown in table 1:
[0021] Table 1: Embodiment and comparative example gypsum clinker treatment conditions
[0022]
[0023]
[0024] Explanation: In Table 1, the diameters of the grinding media in Example 6 are 1 cm, 0.75 cm and 0.5 cm, and the grinding media of the three sizes each account for one-third of the mass.
[0025] The above-mentioned ground clinker is tested for bulk density and specific surface area. Then mix the prepared clinker with water to form a slurry, pour the mixed slurry into a fixed mold, and test the samples according to the Chinese natio...
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Abstract
The invention provides a ball-milling method of gypsum clinker, which comprises the following steps: carrying out ball-milling on the gypsum clinker by using zirconia balls as a ball-milling medium; the gypsum clinker is obtained by calcining a gypsum raw material at the temperature of 180-220 DEG C for 30-60 minutes. The clinker milled by the ball milling method provided by the invention is excellent in performance and more convenient to produce, the energy consumption is reduced under the condition of not changing the sequence of the technological process, and in addition, the mechanical property of the gypsum board prepared based on the method is further improved.
Description
technical field [0001] This article relates to but not limited to the field of gypsum building materials, especially relates to but not limited to an efficient and stable clinker ball milling process. Background technique [0002] In the production of gypsum board, the essential raw material is hemihydrate gypsum. The hemihydrate gypsum after direct calcination cannot be directly used to produce gypsum board, because the clinker at this time is not stable enough, and iron balls are often used in factories. However, the clinker produced by iron ball grinding will also have many problems. If the grinding time is too short, the particle size of the clinker will not meet the requirements, the hydration and coagulation time will be prolonged, and the grinding time will be too long. If it is long, it will also increase the temperature of the material, which will further dehydrate the hemihydrate gypsum, and the content of crystal water will be lower. When such clinker is used to p...
Claims
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IPC IPC(8): B02C17/10B02C17/18B02C17/20C04B11/00
CPCB02C17/10B02C17/1805B02C17/1815B02C17/20C04B11/00Y02P40/10
Inventor 丛宇张赫李帆
Owner CHINA NAT BUILDING MATERIALS TECHCAL INNOVATION & RES INST LIMITED