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Burner for producing inorganic spherical particles

A technology of spheroidization and inorganic matter, applied in the direction of burner, gas fuel burner, combustion type, etc., can solve the problem of insufficient burner and achieve good dispersion effect

Inactive Publication Date: 2013-07-24
NIPPON SANSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Therefore, in order to obtain spherical particles with a smaller average particle size, the burners described in Patent Documents 3 and 4 are not sufficient.

Method used

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  • Burner for producing inorganic spherical particles
  • Burner for producing inorganic spherical particles
  • Burner for producing inorganic spherical particles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0110] use image 3 The shown inorganic spheroidized particle production apparatus produces spheroidized particles.

[0111] by 7.5Nm 3 A carrier gas composed of oxygen per hour transports silicon dioxide powder in a total amount of 20 kg / h as a raw material powder. 5Nm supplied as fuel gas 3 / h of LPG. will be used as the total amount of oxygen-containing gas is 20Nm 3 Oxygen per hour is divided into two parts and introduced into the burner 12 to produce spheroidized particles, and the spheroidization processing ability to obtain a vitrification rate of 98% or more is sought.

[0112] At this time, according to the particle size of the raw material powder, the supply to the above-mentioned first oxygen injection hole 5B (primary oxygen) and the second oxygen injection hole 7B is changed within the range of 0 to 100% of primary oxygen and 100 to 0% of secondary oxygen. (secondary oxygen) oxygen ratio to study the conditions that can achieve a vitrification rate of more th...

example 2

[0123] The raw material powder uses silica powder, and prepares three raw materials: raw material powder A with an average particle size of 15 μm, raw material powder B with an average particle size of 2 μm, and raw material powder C with an average particle size of 5 μm mixed with 35 wt% of raw material powder A and 65 wt% of raw material powder B powder.

[0124] Using the prior art burner described in Patent Document 3, with 7.5Nm 3 Carrier gas consisting of oxygen per hour transports and supplies 20 kg / h of raw material powder C. 5Nm supplied as fuel gas 3 / h of LPG. Supply 20Nm 3 / h of oxygen to produce spheroidized particles, and seek the spheroidization processing ability to obtain a vitrification rate of more than 98%.

[0125] Use the burner of the present invention, use by 5.25Nm 3 The carrier gas composed of oxygen per hour transports the raw material A of 7kg / h to the first raw material ejection hole 3, and uses 2.25Nm 3 The carrier gas consisting of oxygen p...

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Abstract

A burner for production of inorganic spheroidized particles according to the present invention includes a first raw material supply path (1A) through which a raw material powder is supplied together with a carrier gas; a fuel supply path (4A) disposed around the outer circumference of the first raw material supply path (1A), through which a fuel gas is supplied; a primary oxygen supply path (5A) disposed around the outer circumference of the fuel supply path (4A), through which an oxygen-containing gas is supplied; a second raw material supply path (6A) disposed around the outer circumference of the primary oxygen supply path (5A), through which a raw material powder is supplied together with a carrier gas; and a secondary oxygen supply path (7A) disposed around the outer circumference of the second raw material supply path (6A), through which an oxygen-containing gas is supplied.

Description

technical field [0001] The present invention relates to a burner used for producing spherical inorganic particles and an apparatus for producing spherical inorganic particles using the burner. [0002] This application claims priority based on Japanese Patent Application No. 2008-201301 filed in Japan on August 4, 2008, the contents of which are incorporated herein by reference. Background technique [0003] The inorganic spheroidized particles are obtained by melting and pulverizing raw material powders such as silica in a high-temperature flame, and spheroidizing by surface tension. [0004] For example, high-purity spherical silica, which uses silica as a raw material, is widely used as a filler for epoxy sealing materials for semiconductor devices. Spheroidization improves the fluidity of the filler, high filling, and wear resistance. Improvement and other advantages. [0005] In addition, in this specification, an inorganic spherical particle may be described only as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/16B01J19/00C01B33/18C03B19/10F23D14/22
CPCF23C2900/07022F23C2900/07021F23D14/22C03B2201/02B01J2/02C03B19/1025F23D14/32B01J2/16B01J19/00C01B33/18
Inventor 萩原义之山本康之
Owner NIPPON SANSO CORP