Preparation method of magnesium oxide for insulated cable knob insulator, magnesium oxide and application of magnesium oxide

A technology of insulating cable ceramic column and magnesium oxide, applied in the direction of magnesium oxide, can solve the problems of long time consumption, high energy consumption, high calcination temperature, and achieve the effect of weight reduction and energy consumption reduction

Active Publication Date: 2014-03-26
SHANGHAI TONNOR MATERIAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned whole process takes a long time and consumes a lot of energy
In addition, in the later stage of preparation of mineral insulated cable insulating porcelain pillars, the calcination temperature is high and the calcination time is long, so it is difficult to significantly reduce the manufacturing cost of the cable and improve the manufacturing efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention provides a method for preparing magnesium oxide for insulating cable porcelain columns, comprising the following steps:

[0022] Step 1, calcining the raw material magnesia at a temperature of 1100-1200° C. to obtain light-burned magnesia;

[0023] Step 2, using the light-burned magnesia obtained in the step 1 to prepare light-burned magnesia with two particle sizes, which are light-burned magnesia with a particle size greater than 150 mesh and 80-150 mesh;

[0024] Step 3. Mix light-burned magnesia with a particle size greater than 150 mesh and 80-150 mesh to obtain magnesia for mineral insulated cable porcelain columns, wherein the amount of light-burned magnesia with a particle size greater than 150 mesh is the mineral insulated cable porcelain The column uses 3-5% of the total amount of magnesium oxide.

[0025] The light-burned magnesia with two particle sizes is mixed in a certain ratio, so that the gaps between the light-burned magnesia particles a...

Embodiment 1

[0040] The preparation method of magnesium oxide for insulating cable porcelain column comprises the following steps:

[0041] Step 1. Calcining the raw material magnesia at a temperature of 1150°C for 3 hours to obtain light-burned magnesia with a purity greater than 90%. The raw material magnesia is obtained by the following method: screening raw material magnesia with a diameter of less than 8mm from magnesite tailings , and then go through magnetic separation by strong magnetic machine;

[0042] Step 2, using the light-burned magnesia obtained in the step 1 to prepare light-burned magnesia with two particle sizes, which are light-burned magnesia with a particle size greater than 150 mesh and 80-150 mesh respectively. The specific process is as follows: The light-burned magnesia obtained in step 1 is ground to more than 50 mesh by Raymond Mill, and then the light-burned magnesia after grinding is screened by a grading vibrating sieve, and the sieving particle sizes of the g...

Embodiment 2

[0048] The preparation method of magnesium oxide for insulating cable porcelain column comprises the following steps:

[0049] Step 1. Calcining the raw magnesia at a temperature of 1180° C. for 3 hours to obtain light-burned magnesia with a purity greater than 90%. The raw magnesia is obtained by the following method: screening raw magnesia with a diameter of less than 8 mm from magnesite tailings , and then go through magnetic separation by strong magnetic machine;

[0050] Step 2, using the light-burned magnesia obtained in the step 1 to prepare light-burned magnesia with two particle sizes, which are light-burned magnesia with a particle size greater than 150 mesh and 80-150 mesh respectively. The specific process is as follows: The light-burned magnesia obtained in step 1 is ground to more than 50 mesh by Raymond Mill, and then the light-burned magnesia after grinding is screened by a grading vibrating sieve, and the sieving particle sizes of the grading vibrating sieve a...

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Abstract

The invention discloses a preparation method of magnesium oxide for an insulated cable knob insulator, the magnesium oxide and application of the magnesium oxide to preparation of the insulated cable knob insulator. According to the preparation method, the energy consumption in a production process of the magnesium oxide is reduced, and the magnesium oxide production cost is about 2 / 3 of the cost of fused magnesium oxide. The magnesium oxide prepared by the method is used for producing the knob insulator; and under the condition of guaranteeing various performance of the knob insulator, the density of the finally obtained knob insulator is 1.9-2.0 g / cm<3> and the weight of the knob insulator is 10-15 percent. The method is also particularly suitable for preparation of the magnesium oxide for a mineral insulated cable knob insulator.

Description

technical field [0001] The invention relates to a magnesium oxide material for insulating cable porcelain columns, in particular to a preparation method of magnesium oxide for insulating cable porcelain columns, Background technique [0002] Mineral insulated cables, as fireproof cables, play a very important role in national economic construction. With the development of the economy, the mineral insulated cables are used more and more widely. At present, the main production materials of mineral insulated cables in my country have all been domestically produced, but due to the characteristics of the insulating material magnesium oxide filler, there are always shortcomings such as high energy consumption and low productivity in the cable manufacturing process, which makes it difficult to reduce the production cost of mineral insulated cables. . At the same time, under the background of energy saving and emission reduction, enterprises are paying more and more attention to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/04C04B35/622C01F5/02
Inventor 张楠崔永坤
Owner SHANGHAI TONNOR MATERIAL SCI
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