Difference between the firing of wood kiln porcelain and coal kiln, gas kiln firing

The firing of wood kiln porcelain is difficult:

One is the government expressly banned the burning of wood kilns, there is no supply of pine firewood, the second is a kiln down, burned nearly 2,000 pounds of pine firewood, the cost is quite high, the third is to burn a kiln to have a whole set of experienced teamwork collectively, especially the pile masters, no decades of successful experience is not possible, is not a patchwork of a few people on the line, if there is no special funding to ensure that and the purpose of the fire, who dare not move easily. If there is no special financial guarantee and purpose, who also dare not easily move the fire.

The inherent difference between wood kiln firing and coal kiln, gas kiln and other firing methods:

The only wood kiln that is still in normal production in Jingdezhen at present is the base of the national essence of the Baochenglin millennium kiln officer. In the past, masonry technology is completely monopolized by the family line gangs, masters teach by word and example, confidentiality. Before each kiln firing, we must ask the "contracted kiln households" to specialize in overhauling, outsiders can not operate. A kiln used 60-80 times must be rebuilt. Each burn 1 kg of porcelain needs 2-3 kg of pine wood, large egg-shaped kiln can burn 10-15 tons of daily-use porcelain, needing 25-40 tons of pine wood, small kilns to burn a higher proportion of pine wood, of course, the cost is even higher. Not what people just build a stove can use a few wood burning porcelain.

In order to protect forest resources, Jingdezhen in the late 50's when switching to burning coal, oil, found that the ancestors used to match the glaze has not adapted to the high temperature of the viscosity decreases very quickly, the glaze burned out of the yin and yellow, sinking carbon, smoky. Note the two key words in the above sentence, a viscosity, a glaze yellow, in fact, this reveals that the fuel improvement of the temperature curve and the kiln material elements have changed. Ancient lime glaze can no longer be used, and later reformed into a long stone glaze, also known as 5311 glaze.

Ancient glazes have a high content of natural coloring oxides inside the glaze, which produces a line of kiln red in some of the tire glaze joints, which is a characteristic phenomenon. In the ancient old firewood kiln firing environment, those coloring oxides are not to worry about, the old firewood kiln can extinguish its harm, and even in the extinguishing of harm at the same time to create a glaze white in the green jade effect, ingenious.

Coal kilns, gas kilns, electric kilns? Can not do. Those who do high imitation of modern, if according to the ancient glaze technology with glaze, he must take firewood to burn, with other fuels he can not burn, even with computer control of temperature changes in the kiln at most to solve the problem of "viscosity".

Another method is to engage in false glaze, that is, with the glaze suitable for modern gas kiln firing to do something, add something, simulate a little, and then also use the gas kiln firing, this is not high imitation.

The wood kiln pine fuel on ceramics have a moisturizing effect, in the process of firing the kiln gas atmosphere is very suitable for the local Jingdezhen porcelain raw materials, can be fired out of white slightly green porcelain tire effect, so that Jingdezhen ceramics have a unique local style of white as jade.

Ceramics is the perfect combination of earth and fire, with the wood kiln porcelain and gas kiln, electric kiln porcelain like we use water vapor steamed buns with microwave steam buns the same difference, a fluffy and tasty, one is hard. Chai kiln firing traditionally has been using pine, pine rich in turpentine, turpentine volatilized during the combustion process of ceramics have a moisturizing effect, the firing principle is to add firewood so that the temperature rises slowly, so that the kiln in the vessel is slowly heated, coupled with the furnace of the organic combination of vapor and porcelain glaze, so that the glaze burned out of the porcelain implicitly, moisturizing.