Manufacturing process of firewood-fired Jianzhan

Abstract

The invention discloses a manufacturing process of a firewood-fired Jianzhan. The manufacturing process comprises the following steps: preparing a green body and glaze slip; glazing: sub-packaging theglazed and air-dried green body by using a sagger, and roasting in a firewood firing kiln; and cooling and discharging from furnace. According to the Jianzhan fired through the method, the green black glossy glaze surface is provided with dense silver bright color oil drops or drop hairs, and meanwhile the glaze surface is smooth and rich in charm. The method is clear in technological process, easy to control, good in stability and high in yield, and the Jianzhan with an artistic effect can be manufactured.

Description

technical field [0001] The invention relates to the technical field of porcelain, in particular to the manufacturing process of Jianzhan. Background technique [0002] Jianzhan, produced in Jianyang District, Nanping City, Fujian Province, is a national geographical indication product of China. Jianzhan mostly has a large mouth and small bottom, some are shaped like a funnel, most of them have ring feet and the ring feet are relatively shallow, and the roots of the feet are often trimmed; a few are solid feet (mainly small round bowls). The shape is simple and vigorous, and the handle is generally heavy. Compared with other pottery and porcelain, it has a unique charm, so it is very popular among people. [0003] At present, Jianzhan mainly adopts three methods of firing: electric firing, gas firing and dragon kiln firewood firing. Each method has its own advantages and disadvantages: [0004] Electric firing is to convert electric energy into heat energy to raise the temp...

AI Technical Summary

Problems solved by technology

At present, this kind of firing method is mainly used in Jianyang, but the glaze surface of the fired Jianzhan is not warm enough, and the glaze layer is relatively scarce and monotonous.

[0005] Gas firing generally uses coal gas or natural gas as fuel to increase the temperature in the kiln. The principle is to adjust the concentration of carbon monoxide in the kiln by controlling the air intake pressure, air intake holes and smoke exhaust holes, and create a reducing atmosphere suitable for building lamps. Weak reduction state, the effect of Jianzhan glaze is better, but it is more difficult to fire Jianzhan in gas kiln than electric kiln, and it is more difficult to master

[0006] Firewood is mainly fired in the "Dragon Kiln" built on the mountain, using wood as fuel to increase the temperature in the kiln. The biggest difference from ordinary electric and gas kilns is that the ashes and flames produced by the burning of wood directly enter the kiln. , the phenomenon of natural ash falling on the green body, some inorganic substances in the firewood ash undergo a chemical reaction with the glaze surface after a long period of heating, and then change the molecular structure of the glaze material, making the glaze surface moist and rich in layers; but Because the dragon kiln needs to burn a lot of firewood to maintain the firing temperature, it needs to consume a lot of wood and produce too much soot, resulting in high production costs and polluting the air; at the same time, the temperature of the dragon kiln is difficult to control, and the molding temperature range of Jianzhan It is also very narrow, and the clay required for making the lamp has a high iron content, so the glaze surface of the dragon kiln firewood is very prone to defects such as glaze blistering, flowing glaze sticking to the bottom, and uneven temperature "yin and yang sides". It is very difficult to manufacture, and the yield is very low (often less than 30%)

[0007] At present, there is no firing method that is easy to control and at the same time has a warm glaze and full of charm.

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