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Method for improving Nixing pottery large vessel firing yield

A firing rate, Nixing pottery technology, applied to clay products, other household utensils, household utensils, etc., can solve the problems of low firing rate, uneven shrinkage, large thermal stress, etc., to improve firing rate, reduce The effect of cracking and deformation

Active Publication Date: 2014-06-04
GUANGXI QINZHOU BEIBU GULF NIXING YUTAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large size and thick wall of large vessels, the firing rate is generally low, only about 60%, or even lower. The main reasons for the low firing rate of large vessels are as follows: 1. When firing at high temperature, heating up too fast will easily cause uneven shrinkage and cause deformation or cracking; 2. When the green body enters the kiln, the moisture is too high, and the temperature rises too fast, causing uneven shrinkage and cracking; 3. During the cooling stage of large vessels, due to Too fast cooling is easy to form a large structural stress, and there will be a large thermal stress inside and on the surface of the green body, resulting in cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Combine Dongni (the soil east of the Qinjiang River across Qinzhou, which is soft clay, yellowish-white in color and contains a small amount of quartz sand) and Xini (the soil west of the Qinjiang River, which is hard clay and purple in color) , the surface color has a small amount of iron dissemination, and the purple mudstone with high iron content) is mixed in a ratio of 6:4, and is made into a blank through grinding, dehydration and other processes, and the blank is formed, trimmed, and dried until it contains water rate≤2%;

[0017] 2) Use asbestos paper to seal the opening of the large vessel body so that the interior is in a closed state;

[0018] 3) Put the sealed large vessel body into the kiln, first raise the temperature in the kiln to 450°C at a rate of 80°C per hour, and then raise the temperature to 450°C at a rate of 140°C per hour. 1100°C and heat preservation for 1 hour, stop heating, first reduce the temperature in the kiln to 800°C at a rate of 14...

Embodiment 2

[0020] 1) Combine Dongni (the soil east of the Qinjiang River across Qinzhou, which is soft clay, yellowish-white in color and contains a small amount of quartz sand) and Xini (the soil west of the Qinjiang River, which is hard clay and purple in color) , the surface color has a small amount of iron dissemination, and the purple mudstone with high iron content) is mixed in a ratio of 6:4, and is made into a blank through grinding, dehydration and other processes, and the blank is formed, trimmed, and dried until it contains water rate≤2%;

[0021] 2) Use asbestos cloth to seal the opening of the large vessel body so that the interior is in a closed state;

[0022] 3) Put the sealed large vessel body into the kiln, first raise the temperature inside the kiln to 550°C at a rate of 130°C per hour, and then raise the temperature to 550°C at a rate of 180°C per hour. 1200°C and heat preservation for 2 hours, then stop heating, first reduce the temperature in the kiln to 850°C at a...

Embodiment 3

[0024] 1) Combine Dongni (the soil east of the Qinjiang River across Qinzhou, which is soft clay, yellowish-white in color and contains a small amount of quartz sand) and Xini (the soil west of the Qinjiang River, which is hard clay and purple in color) , the surface color has a small amount of iron dissemination, and the purple mudstone with high iron content) is mixed in a ratio of 6:4, and is made into a blank through grinding, dehydration and other processes, and the blank is formed, trimmed, and dried until it contains water rate≤2%;

[0025] 2) Use an asbestos quilt to seal the opening of the large vessel body so that the interior is in a closed state;

[0026] 3) Put the sealed large vessel body into the kiln, first raise the temperature in the kiln to 500°C at a rate of 110°C per hour, and then raise the temperature to 500°C at a rate of 160°C per hour. 1150°C and heat preservation for 1.5 hours, then stop heating, first reduce the temperature inside the kiln to 820°C...

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PUM

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Abstract

The invention provides a method for improving Nixing pottery large vessel firing yield, which comprises blank material preparation, blank material molding, green body finishing, green body drying, green body decoration, and green body sintering, and is characterized in that green body firing is carried out by blocking an opening of a large vessel green body by using a refractory material to allow the internal space to be in a closed state, and then firing by a conventional process. A refractory material is used to block an opening of a large vessel green body so as to allow the internal space to be in a closed state; during firing and cooling, the vessel is not easy to generate great green body breaking stress due to rapid heating or cooling, and thus cracking or deformation is not caused; therefore, the large vessel firing yield is improved greatly.

Description

technical field [0001] The invention relates to a method for preparing pottery, in particular to a method for increasing the firing rate of large Nixing pottery vessels. Background technique [0002] Nixing pottery in Qinzhou, whose scientific name is purple clay pottery, is one of the four famous pottery in China together with Jiangsu Zisha pottery, Yunnan Jianshui pottery, and Chongqing Rongchang pottery. Nixing pottery is a wonderful flower in the culture and art of the Chinese nation. It has a very long production process, has great cultural collection value, and has strong practicality. The blanks used in Nixing pottery are fine and free of impurities, and the pottery drinking utensils made of pottery have a moderate density of pores, which can play a role in keeping drinks fresh. At the same time, Nixing pottery does not add any additives such as preservatives during the preparation process, and the finished product does not contain any toxic ingredients. It is very h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/32
Inventor 郭卉
Owner GUANGXI QINZHOU BEIBU GULF NIXING YUTAO
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