Powder grinding method and powder grinding machine

Patent metadata

Field	Value
Publication number	US-11045815-B2
Application number	US-201716071275-A
Country	US
Kind code	B2
Filing date	Jan 16, 2017
Priority date	Jan 21, 2016
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A powder pulverization device is provided. The device includes a hermetically sealed pulverization container, a powder introduction mechanism having an introduction inlet opened inwardly to the pulverization container, and introducing powder to be pulverized to the introduction inlet, a powder pulverization mechanism disposed at a portion below the introduction inlet in the pulverization container, and a classification device disposed at a portion above the introduction inlet in the pulverization container for screening pulverized powder and leading the screened powder out from the pulverization container. An inner wall of the pulverization container is covered with a porous lining material and each hole of the lining material communicates with an air supply via a gap between the inner wall and the lining material.

First claim

The invention claimed is:

1. A powder pulverization device comprising:
a hermetically sealed pulverization container;
a powder introduction mechanism having an introduction inlet opening inwardly to the pulverization container, and introducing powder to be pulverized to the introduction inlet;
a powder pulverization mechanism disposed at a portion below the introduction inlet in the pulverization container for causing high-pressure air to collide with powder, thereby pulverizing the powder; and
a classification device disposed at a portion above the introduction inlet in the pulverization container for screening pulverized powder to a screened powder and leading the screened powder out from the pulverization container,
wherein an inner wall of the pulverization container is covered with a porous lining material and each hole of the porous lining material communicates with an air supply device via a gap between the inner wall and the porous lining material.

2. The powder pulverization device according to claim 1 , wherein the pulverization container comprises a body and a bottom continuous from the body, and the porous lining material at least covers a whole area of the bottom and an area of the body lower than the classification device.

3. The powder pulverization device according to claim 1 , wherein the powder pulverization mechanism comprises at least a pair of pulverization nozzles for injecting high-pressure air from injection outlets, and the at least a pair of pulverization nozzles are disposed so that the injection outlets are oppositely disposed.

4. The powder pulverization device according to claim 2 , wherein the powder pulverization mechanism comprises at least a pair of pulverization nozzles for injecting high-pressure air from injection outlets, and the at least a pair of pulverization nozzles are disposed so that the injection outlets are oppositely disposed.

Assignees

• Sakai Chemical Industry Co

Inventors

• Tsuda Koichi
• Okita Hiromasa

Classifications

• C01F11/462

  Sulfates of Sr or Ba · CPC title

• B02C19/06 Primary

  Jet mills · CPC title

• C01F11/46

  Sulfates (dehydration of gypsum {for the production of calcium sulfate cements} C04B11/02) · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01F5/14

  Magnesium hydroxide · CPC title