Method for preparing additive for zinc oxide resistance slice
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A zinc oxide resistor sheet and additive technology, applied in resistor manufacturing, resistors, varistors, etc., can solve the problems of long process cycle, high labor intensity, and many equipment, and achieve short process cycle, low labor intensity, Efficient effect
Active Publication Date: 2009-01-28
CHINA XD ELECTRIC CO LTD
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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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Embodiment 1
[0011] Bi 2 o 3 , Sb 2 o 3 , Mn 2 CO 3 、Cr 2 o 3 、Co 2 o 3 , SiO 2 According to the molar percentage respectively: 15.2mol%, 21.7mol%, 10.9mol%, 10.9mol%, 10.9mol%, 30.4mol% carry out batching, as raw material, add the water of 1.5 times of described raw material weight, stir in vertical Ball milling in the ball mill for 90 minutes; then in the pressure spray drying tower, the spray pressure is controlled to 1.5MPa, the inlet temperature is 380°C, and the outlet temperature is 130°C for drying; then it is calcined in a bowl, and the calcining curve is as follows figure 1 Shown; Finally, pass through 40 mesh sieves after crushing, secondary ball milling, get final product zinc oxide resistive film additive of the present invention.
Embodiment 2
[0026] Bi 2 o 3 , Sb 2 o 3 , Mn 2 CO 3 、Cr 2 o 3 、Co 2 o 3 , SiO 2 According to the molar percentage: 12.5mol%, 25mol%, 12.5mol%, 12.5mol%, 12.5mol%, 25mol%, the ingredients are carried out respectively, as the raw material, water of 1.1 times the weight of the raw material is added, and the mixture is carried out in a vertical stirring ball mill Ball milling for 90 minutes; then in the pressure spray drying tower, control the spray pressure to 1.3MPa, the inlet temperature is 250°C, and the outlet temperature is 100°C for drying; then it is calcined in a bowl, and the calcination curve is as figure 1 shown; finally, after crushing, pass through a 40-mesh sieve, and ball mill for the second time.
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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...
Claims
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Application Information
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