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Shade drying method for large-size electric porcelain blank

A large-size, blank technology, which is applied in the shade-drying field of large-size electric porcelain blanks, can solve the problems of large influence of natural shade-drying, easy quality fluctuation, and poor moisture uniformity of blanks, etc., to achieve controllable baking, The effect of shortening the production cycle and speeding up material turnover

Inactive Publication Date: 2019-08-16
张国华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preheated billet is usually carried out by natural shade drying, and then baked with natural gas after natural shade drying, which has the following technical problems: the cycle of natural shade drying needs 8 to 10 days, and the moisture uniformity of the billet is not good (this is not good for large The size of the ceramic blank is especially affected, and the large size usually refers to the blank with a diameter of 180mm and above); natural drying in the shade is greatly affected by environmental factors, and quality fluctuations are prone to occur

Method used

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  • Shade drying method for large-size electric porcelain blank

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] This embodiment provides a method for drying large-size electric porcelain blanks in the shade, which includes the following steps:

[0019] (A) The raw material components are weighed according to the formula ratio and then mixed and ball milled to obtain a slurry; the raw material components are conventional ones, as disclosed in Example 1 of the Chinese Invention Patent Application No. 201711365521.7 (Of course, other existing Yes); the mass ratio of raw material components (all raw materials), grinding balls and water during ball milling is 1:2:0.5, and the ball milling time is 10h, so that the material can pass through a 250-mesh sieve (0.2~0.5wt% sieve residue);

[0020] (B) Sieving the slurry through a 200-220 mesh sieve to remove larger particles (repeat 3 to 5 times); use a wet magnet separator with permanent magnets and electromagnets in series to remove iron (repeat 3 to 5 times) ); The slurry after iron removal is introduced into a filter press for pressure filtr...

Embodiment 2

[0023] This embodiment provides a method for drying large-size electroceramic blanks in the shade, which is basically the same as in embodiment 1, except that: in step (c), the electrification process is: use 20h to uniformize the current of the blank from 0 A Increase to 0.68A, and then keep it for 4 hours under the current condition of 0.68A.

Embodiment 3

[0025] This embodiment provides a method for drying large-size electroceramic blanks in the shade, which is basically the same as that in embodiment 1, except that: in step (c), the energization process is: the blank is heated at a speed of 0.04A / h The current was uniformly increased from 0 A to 0.68A, and then maintained at a current of 0.68A for 4 hours.

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Abstract

The invention relates to a shade drying method for large-size electric porcelain blanks, which comprises the following steps of: (a) weighing raw material components according to a formula ratio and carrying out mixed ball milling to obtain slurry; (b) sieving and removing iron from the slurry, and then pressing and trimming the slurry to form a blank; (c) electrifying both ends of the blank to remove moisture. The production cycle is greatly shortened, the material turnover is accelerated, the drying time in the shade only needs 2-3 days, and the production efficiency is improved. The internal moisture of the blank is very uniform, so that subsequent baking is more controllable; meanwhile, the baking time in the later period can be shortened by 1-2 days, the consumption of natural gas energy is reduced, and the qualified rate of finished products can be improved by more than 20%.

Description

Technical field [0001] The invention belongs to the field of electric porcelain insulators, and relates to a method for manufacturing an electric porcelain blank, in particular to a method for drying a large-size electric porcelain blank. Background technique [0002] Insulators are usually made of glass or ceramics. They usually play two roles in overhead transmission lines: supporting wires and preventing current from returning to the ground. Porcelain insulators (ie, electric porcelain) are classified into many categories. According to the structure, they can be divided into column insulators (ie rods), suspension insulators, pin insulators, butterfly insulators, tension insulators, anti-pollution insulators and bushing insulators. [0003] With the improvement of the requirements of the electric power construction department for porcelain insulators, the performance of porcelain insulators is developing in the direction of high strength, high voltage level, high pollution resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/26C04B33/30C04B35/622F26B3/34
CPCC04B33/26C04B33/30C04B35/622F26B3/34
Inventor 张国华
Owner 张国华