Preparation method of washed-black clay glazed brick green body

Abstract

The invention provides a preparation method of a washed-black clay glazed brick green body. Local resourceful raw mineral materials of Guangdong washed-black clay, potassium-sodium stone powder, Xingning high-aluminium high-potassium sand, high-aluminium sand, wollastonite, burnt lime and Longtian sand are used, by adjusting the raw material composition proportion, the soft raw material washed-black clay and the hard raw materials are subjected to ball-milling separately, after spray drying, hydrocyclone reaction is conducted, then a polyvinyl alcohol solution is added in an atomizing and spraying mode, compression moulding and drying are conducted to prepare a brick green body, and finally, a biscuit is obtained through sintering. According to the method, ball-milling time is short, the efficiency is high, the washed-black clay is good in dispersibility and small in grain size, even mixing can be achieved by the washed-black clay and the hard raw materials, compared with a traditionalball-milling mixing working procedure, the method has the advantages that the usage of the additive polyvinyl alcohol solution can be reduced, and meanwhile, the glazed brick green body with high drying strength and rupture strength can be obtained.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for preparing a water-washed black glazed brick body. Background technique [0002] With the advancement of urbanization and new rural construction in the past ten years, the real estate industry has developed vigorously, and people's interior decoration grades have also been continuously improved. Glazed tiles have always been favored as a high-strength, easy-to-clean, and formaldehyde-free building decoration material. , and China has a long history and advanced technology in the development of ceramic materials, and now a large number of ceramic materials such as glazed tiles are exported abroad. [0003] In the production process of glazed tiles, clay is commonly used as its plastic raw material, and its addition amount is generally more than 20%. In order to produce high-quality glazed tiles and increase added value, high-quality clay is often used as raw material...

AI Technical Summary

Problems solved by technology

Through step-by-step ball milling, although it can save ball milling time, reduce power consumption, and reduce production costs, since clay is a soft material, it is still unavoidable that the clay wraps the hard material during the ball milling process, and the clay will still adhere to the grinding surface. On the ball, the effect of ball milling is reduced, and it is unavoidable to avoid stratification and agglomeration of hard and soft materials due to differences in density and particle size during the drying process of the secondary mud

[0008] To sum up, in the prior art, in the process of preparing glazed brick body by using black nib as a raw material, due to the special properties of washed black ni, it is difficult to disperse in the ball mill slurry, and it cannot be mixed evenly with other hard materials. , even if the washed black tile itself has a high viscosity and is a good plastic raw material, due to the existence of local defects, it is difficult for the glazed brick body prepared by it to achieve high dry strength and flexural strength, resulting in an increase in the reject rate during processing

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