Method for producing self-releasing black glazed pottery

Abstract

The invention provides a method for producing self-releasing black glazed pottery. The black glaze sand device is prepared from 45%-60% of Baishan clay and 40%-55% of coal ash; the specific process ofthe method comprises steps as follows: the raw materials are added to a ball mill, and the materials, balls and water in a ratio of 1:1.8:0.7 are subjected to ball milling and sieved by a 60-mesh screen; excess moisture is removed until the moisture content is 22%-24%, and vacuum clay refining and aging are performed twice under conditions that the vacuum degree is 0.085 MPa or lower, and aging time is 7 days or longer; fettling is performed when the moisture content of a blank is 14%-16% after clay forming; the blank is moved to a drying room for loading into a kiln and firing; firing stopsafter the firing temperature of the blank reaches 1250-1300 DEG C, wood is added to the kiln when the product temperature is reduced to about 600 DEG C, a kiln cover or a kiln door is closed rapidly,and other holes are sealed for natural cooling until the product is cooled to 100 DEG C or lower. The black glaze fired once is pure in color, the self-releasing glaze is more uniform, and stains arereduced; the wood is added after firing, and an inlet and an outlet are sealed, so that air intake and heat loss are reduced, the incapability of glaze self-releasing of a product is effectively prevented in a glaze self-releasing process, and quality of the self-releasing glaze is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of making black-glazed sand ware, and in particular relates to a manufacturing process related to self-releasing black-glazed sand ware. Background technique [0002] With the improvement of living standards, people's requirements for black sand ware are getting higher and higher, and they tend to be practical and artistic for daily use. Color glaze is favored by people for its pure and dignified decorative effect. At present, people have a great demand for black sandware. The inside of the black glaze is the blank, and the outside is the glaze. Different batches of glaze will form different colors on the surface of the sandware when they are melted at high temperature. The traditional formula is single. And some ingredients are too much, which will lead to the change of glaze color and the uncertainty of the combination of glaze and base glaze. Therefore, the use of traditional glaze color formulas cannot s...

AI Technical Summary

Problems solved by technology

At present, people have a great demand for black sandware. The inside of the black glaze is the blank, and the outside is the glaze. Different batches of glaze will form different colors on the surface of the sandware when they are melted at high temperature. The traditional formula is single. And some ingredients are too much, which will lead to the change of glaze color and the uncertainty of glaze combination. Therefore, the use of traditional glaze color formulas cannot show the change of black and thick color during the melting process, and the products out of the kiln are easy to fade. Unstable color rendering

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