Firing method of electric porcelain blank

A blank and electric porcelain technology, applied in the field of ceramic firing technology, can solve the problems of high energy consumption, long firing cycle, poor controllability, etc., and achieve the effect of less gas consumption and high product strength

Active Publication Date: 2015-10-28
JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this makes the firing cycle longer, the process is complex and changeable, the controllability is poor, and the energy consumption is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0009] The firing method of the electric porcelain blank in this embodiment is basically the same as the firing method of the existing electric porcelain blank, the difference is that the steps of strong reduction and weak reduction (step 3) and step 4) are Neutral flame, the mixing ratio of air and natural gas to produce a neutral flame is 1:1, further, a neutral flame can also be used in the high-fire heat preservation step.

[0010] The firing method of the electric porcelain blank of prior art comprises the following steps:

[0011] 1) Oxidative decomposition, put the formed electric porcelain blank into the kiln for firing, and slowly raise the temperature from room temperature to 960°C for 30-40 hours;

[0012] 2) Oxidation and heat preservation, heat the electric porcelain blank at 960°C in the kiln for 10 to 15 hours;

[0013] 3) Strong reduction, heating from 960°C for 5-9 hours to 1100°C;

[0014] 4) Weak reduction, heating from 1100°C for 4 to 8 hours to 1250°C; ...

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PUM

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Abstract

The invention discloses an electrical porcelain blank firing method which includes oxygenolysis, oxidation temperature preservation, strong reduction, weak reduction, heat preservation through strong fire and cooling sequentially performed in a kiln, wherein the atmosphere in the kiln in steps of the strong reduction and the weak reduction is neutral flame. By means of the electrical porcelain blank firing method, the neutral flame replaces the existing reduction flame, and the electrical porcelain blank firing method has the advantages of being high in product strength, less in gas consumption and the like.

Description

technical field [0001] The invention relates to a firing process of ceramics, in particular to a firing method of an electric porcelain blank. Background technique [0002] Electric porcelain products include porcelain insulators, pillars, bushings, etc., which are widely used in power transmission and distribution lines, power stations and electrical equipment, and are important insulating materials in the electric power industry. The existing electric porcelain blanks are all made by firing method, and the firing process generally includes six stages of oxidation decomposition-oxidation heat preservation-strong reduction-weak reduction-high fire heat preservation-cooling, in the strong reduction stage kiln The CO content in the kiln is controlled at 3-6%, and the CO content in the kiln is controlled at 1-3% in the weak reduction stage. The purpose of using the reducing flame is to reduce the sulfate in the green body to sulfite and the iron oxide to ferrous oxide. Make th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/64
Inventor 杨志峰王根水王士维周志勇刘少华余翔
Owner JIANGSU SOUTH PORCELAIN INSULATOR CO LTD
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