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Method for preparing high-strength porcelain insulator blank by agitating type sanding

A porcelain insulator and stirring technology, which is applied in the field of stirring sand milling to prepare high-strength porcelain insulator blanks, can solve the problems of low grinding efficiency and wide particle distribution range, and achieve reduced grinding energy consumption, narrow particle size distribution range, and improved Effect of Mechanical Strength and Electrical Dielectric Strength

Inactive Publication Date: 2011-06-22
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to propose a method for preparing high-strength porcelain insulator blanks by stirring sand milling in view of the shortcomings of traditional ball milling methods such as low grinding efficiency and wide particle distribution range. Under the premise of high performance, it can maximize the grinding efficiency and reduce the distribution range of particles. The particle shape of the obtained powder is nearly spherical and has good fluidity, which is conducive to improving the microstructure of porcelain insulator products; by improving the ceramic insulator blank Uniformity, to achieve the purpose of improving the mechanical strength, electrical insulation strength and operational reliability of porcelain insulator products; it can also promote energy saving and clean production in the production process of porcelain insulators, and effectively reduce the manufacturing cost of high-strength porcelain insulator products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The method for preparing high-strength suspended porcelain insulator blanks by stirring sand milling is:

[0022] (1) Prepare bauxite and feldspar with a fineness of less than 100 μm into a slurry with a water content of about 50% and good fluidity and suspension.

[0023] (2) The slurry is continuously fed into the lower inlet of the agitating sand mill by a pneumatic diaphragm pump; the inner wall of the grinding chamber of the sand mill is lined with corundum ceramic sheets, the exterior of the agitator is covered with polyurethane, and the grinding chamber is filled with φ3± 0.5mm medium aluminum corundum porcelain sand; when the slurry fills the cavity of the sand mill, start the agitator;

[0024] Stirring sand mill can adopt prior art product.

[0025] (3) Use a frequency converter to adjust the speed of the agitator to 800 rpm-1000 rpm, so that the slurry and the corundum porcelain sand will move relative to each other to achieve high-efficiency g...

Embodiment 2

[0028] Embodiment 2: The method for preparing a high-strength rod-shaped porcelain insulator blank by stirring sand milling is:

[0029] (1) Grind the hard raw materials of bauxite and feldspar to a fineness below 320 mesh (about 50 μm) with a Raymond mill, and prepare various raw materials in the formula into fluidity with a water content of 40%-50% and slurry with good suspension;

[0030] (2) The slurry is continuously fed into the lower inlet of the agitating sand mill with a pneumatic diaphragm pump; the grinding chamber of the sand mill is lined with corundum ceramic sheets, the exterior of the agitator is covered with polyurethane, and the grinding chamber is filled with φ3± 0.5mm high alumina corundum porcelain sand; when the slurry fills the cavity of the sand mill, start the agitator;

[0031] (3) Adjust the speed of the agitator to 500 rpm-800 rpm, so that the slurry and the corundum porcelain sand produce relative motion to achieve high-efficiency grinding; the sl...

Embodiment 3

[0033] Embodiment 3: The method for preparing a high-strength hollow porcelain insulator blank by stirring sand milling is:

[0034](1) Grind hard raw materials such as bauxite and feldspar to a fineness below 250 mesh (about 60 μm) with a Raymond mill, and prepare various raw materials in the formula into a fluid with a water content of 40%-50%. Slurry with good suspending properties;

[0035] (2) The slurry is continuously sent to the lower inlet of the agitating sand mill with a pneumatic diaphragm pump. The inner wall of the grinding chamber of the sand mill is lined with more than 10mm of polyurethane, the outer surface of the agitator is covered with polyurethane, and the grinding chamber is filled with φ3±0.5mm medium aluminum corundum porcelain sand; when the slurry fills the chamber of the sand mill , start the mixer;

[0036] (3) Adjust the rotation speed of the agitator to 600 rpm-800 rpm to make the slurry and corundum porcelain sand produce relative motion to ac...

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Abstract

The invention relates to a method for preparing high-strength porcelain insulator blank by agitating type sanding, belonging to a continuous grinding process, and comprising the steps of high efficiency quick grinding by agitating type sanding, hydrocyclone separation and regrinding of coarse particles. In the invention, according to the requirements for hardness and fineness of raw materials, high efficiency quick grinding is carried out by agitating type sanding, thereby greatly improving the grinding efficiency, shortening the grinding time, reducing the scope of particle size distribution, and reducing the energy consumption of grinding. The hydrocyclone separation technology is adopted, particles achieving the fineness requirement are separated in time, and coarse particles which do not achieve the fineness requirement are returned to be reground, thereby preventing the raw materials from being overground, and eliminating the harmful coarse particles. The invention is suitable for grinding a single raw material and mixture of a plurality of raw materials, can effectively reduce the preparation cost of the high-strength porcelain insulator blank, and improves the mechanical strength, electrical insulation strength and operation reliability in a high-voltage fence of porcelain insulator products.

Description

technical field [0001] The invention relates to material preparation technology, and further refers to the preparation of high-strength porcelain insulator blanks by stirring sand milling, which is suitable for preparing various high-strength suspension porcelain insulators, rod-shaped porcelain insulators and hollow porcelain insulators. Background technique [0002] High-strength porcelain insulators are key components of high-voltage power transmission lines and equipment, mainly for electrical insulation and support and fixation. With the development of ultra-high voltage and ultra-high voltage power transmission and transformation projects in China, the requirements for the mechanical strength and reliability of porcelain insulating materials are getting higher and higher. In order to improve the mechanical strength of porcelain insulators, high-strength corundum particles are usually introduced in the form of bauxite to strengthen porcelain insulating materials. At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/16B02C23/12C04B35/626
Inventor 肖汉宁周祥发王思惠
Owner HUNAN UNIV
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