A Firing Process for Improving the Variable Rate of Nixing Pottery Kiln

A technology of Nixing pottery and kiln transformation, which is applied in the field of firing technology to increase the transformation rate of Nixing pottery kiln, which can solve the problems of inactive reduction atmosphere and low kiln transformation rate, and achieve the effect of increasing kiln transformation rate, low temperature and long time

Inactive Publication Date: 2016-03-09
QINZHOU DENGFENG CERAMIC ART
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the test, the reduction reaction of iron oxide occurs at 950-1140°C. In the traditional firing process of Nixing pottery, when it enters high temperature firing, it is fired at one temperature point, and the reducing atmosphere is not active. It is the problem of low kiln change rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A firing process for increasing the variable rate of Nixing pottery kiln, comprising the following steps:

[0023] 1) Warm kiln: put 100 green bodies after drying into the kiln, gradually raise the temperature to 50°C, and keep at this temperature for 35 hours;

[0024] 2) Raise the temperature of the green body after the warm kiln treatment once per hour, each time by 55°C, to 500°C;

[0025] 3) Raise the temperature of the green body after step 2) once an hour, 90°C each time, to 780°C, and at this temperature, close the pores of the kiln, and put the kiln-changing material into the kiln at the same time , the kiln transformation material is pine branches, and the dosage is 120g per cubic meter of kiln space;

[0026] 4) Then raise the temperature once per hour, with a heating rate of 90°C each time, to 1100°C, and the heating speed of the heating pipes distributed in the kiln from bottom to top decreases successively, so that the temperature of the kiln decreases se...

Embodiment 2

[0029] A firing process for increasing the variable rate of Nixing pottery kiln, comprising the following steps:

[0030] 1) Warming kiln: put 100 green bodies after drying into the kiln, gradually raise the temperature to 60°C, and keep at this temperature for 28 hours;

[0031] 2) Raise the temperature of the green body after the warm kiln treatment once per hour, each time by 58°C, to 540°C;

[0032] 3) Raise the temperature of the green body after step 2) once an hour, 95°C each time, to 820°C, and at this temperature, close the air holes of the kiln, and put the kiln-changing material into the kiln at the same time , the kiln transformation material is pine branches, and the dosage is 100g per cubic meter of kiln space;

[0033] 4) Then raise the temperature once per hour, with a heating rate of 92°C each time, to 1080°C, and the heating pipes distributed from bottom to top in the kiln decrease in temperature, so that the temperature of the kiln decreases in turn from bo...

Embodiment 3

[0036] A firing process for increasing the variable rate of Nixing pottery kiln, comprising the following steps:

[0037] 1) Warming kiln: put 100 green bodies after drying into the kiln, gradually raise the temperature to 100°C, and keep at this temperature for 36 hours;

[0038] 2) Raise the temperature of the green body after the warm kiln treatment once per hour, each time by 60°C, to 550°C;

[0039] 3) Raise the temperature of the green body after step 2) once an hour, each time by 100°C, to 800°C, and at this temperature, close the pores of the kiln, and put the kiln-changing material into the kiln at the same time , the kiln transformation material is pine branches, and the dosage is 110g per cubic meter of kiln space;

[0040] 4) Then raise the temperature once per hour, with a heating rate of 95°C each time, to 1120°C, and the heating speed of the heating pipes distributed from bottom to top in the kiln decreases successively, so that the temperature of the kiln decr...

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PUM

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Abstract

The invention discloses a firing technique for enhancing kiln transformation ratio of Nixing pottery, which comprises the following steps: 1) putting a dried billet into a kiln, gradually heating to 50-100 DEG C, and keeping the temperature for 24-36 hours; 2) heating to 500-600 DEG C by 55-70 DEG C an hour; 3) heating to 750-850 DEG C by 90-110 DEG C an hour, closing the air holes of the kiln, and adding the kiln transformation material into the kiln; 4) heating to 1080-1150 DEG C by 90-110 DEG C an hour, wherein the heating speeds of the heating tubes are sequentially lowered from bottom to top in the kiln; and 5) cooling, and taking out the fired billet. In the high-temperature firing stage, the temperature difference appears in the kiln, so that the atmosphere of the reduction reaction is more violent; and the temperature is raised once an hour, so that the temperature in the kiln is changed, thereby enhancing the kiln transformation ratio.

Description

technical field [0001] The invention relates to a firing process of pottery, in particular to a firing process for improving the rate of change of a Nixing pottery kiln. Background technique [0002] The kiln change of Qinzhou Nixing pottery refers to the change of the color and texture of the blank. The Dongni used in Qinzhou Nixing pottery contains rich iron oxide components. Because the iron price elements are oxidized and reduced in different firing atmospheres , the change of valence is different, such as +3 valence, +2 valence, plus the smoke of incomplete combustion in the fuel, the introduction of carbon deposition, so that the color of the billet is more abundant, on the basis of the original iron red, faintly showing Bronze, purple, iron blue, golden, dark green, sky blue, millet and other colors, as well as texture changes such as sky spots and tiger stripes. The kiln changes are magical because of their unpredictable changes, and they are precious because of "se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/32
Inventor 吴莹
Owner QINZHOU DENGFENG CERAMIC ART
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