Method for preparing additive for zinc oxide resistance slice

Abstract

The invention relates to the manufacturing field of a nonlinear resistor plate and in particular discloses a method for preparing an additive for a zinc oxide resistor plate; the additive comprises the following compositions: 12 to 16 mol percent of Bi2O3, 21 to 26 mol percent of Sb2O3, 10 to 13 mol percent of Mn2CO3, 10 to 13 mol percent of Cr2O3, 10 to 13 mol percent of Co2O3 and 23 to 32 mol percent of SiO2; firstly, according to the mixture ratio, the compositions are weighed and used as raw materials; water, the weight of which is 1 to 1.5 times that of the raw materials is added and subjected to primary ball milling; the average particle diameter of the particles of a sizing agent is controlled to be 1 micron; secondly, the particles are dried in a pressure-type spray drying tower; the spray pressure is between 1.3 and 1.5 megapascal; the temperature of an inlet is between 250 and 380 DEG C; the temperature of an outlet is between 100 and 130 DEG C; thirdly, the particles are put into a calcining furnace; the room temperature rises to 200 DEG C within one hour and risen to 800 DEG C in a mode of rising 100 DEG C per 0.5 hour and keeping the temperature for 0.5 hour; the temperature rises form 800 DEG C to 830 DEG C for 0.5 hour and is kept for 40 minutes; the particles are cooled in the furnace; and finally the particles are crushed, sieved and subjected to secondary ball milling.

Description

technical field [0001] The invention relates to the field of manufacturing non-linear resistors, in particular to a method for preparing additives for zinc oxide resistors. technical background [0002] The production of traditional zinc oxide resistors has always been popular with the clinker process, that is, the additive calcination process. That is: batching, ball milling, drying, calcining of additives, crushing, secondary ball milling of additives, mixing and granulation, water-containing molding, debinding, firing, grinding, heat treatment, electrode spraying, paint curing, electrical testing. In the traditional additive production process, the production cycle is relatively long and the equipment used is relatively large, so the traditional process also has many shortcomings: [0003] Disadvantage 1: There are many equipments used, such as ball mills, filter presses, ovens, wheel mills (or pulverizers), calciners, etc. The use of a large number of equipments increas...

AI Technical Summary

Problems solved by technology

In the traditional additive production process, the production cycle is relatively long and the equipment used is relatively large, so the traditional process also has many shortcomings:

[0003] Disadvantage 1: There are many equipments used, such as ball mills, filter presses, ovens, wheel mills (or pulverizers), calciners, etc. The use of a large number of equipments increases the chance of harmful impurities being mixed;

[0004] Disadvantage 2: high labor intensity, long process cycle, high production cost and low production efficiency

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