Ultrafine comminution of mineral and organic powders with the aid of metal-carbide microspheres

• US 5,407,464 A
• Filed: 01/12/1994
• Issued: 04/18/1995
• Est. Priority Date: 01/12/1994
• Status: Expired due to Term

• Current Assignee: Progress Industry Company Limited
• Original Assignee: Progress Industry Company Limited
• Inventors: Kaliski, Adam F.
• Primary Examiner(s): Rosenberg, Peter D.
• Application Number:
  US08/179,973
• Time in Patent Office: 461 Days
• Field of Search: 241/1, 241/22, 75/746
• US Class Current: 75/746
• CPC Class Codes: B02C 17/20 Disintegrating members

Abstract

The present invention relates to ultrafine comminution of mineral and organic powders with the aid of ball-milling techniques employing, as the grinding medium, solid (nonporous) metal-carbide microspheres with diameters of from 10 to 100 μm fabricated with the aid of high-temperature plasma-torch reactors from fully liquefied carbides of tungsten, thallium, niobium and vanadium.

Claims

1. A process for ultrafine comminution of mineral and organic powders, comprising grinding said mineral and organic powders in a ball-milling device with solid (nonporous) metal-carbide microspheres, having diameters of from 10 μ

m to 100 μ

m, as the grinding media.

2. A process according to claim 1, wherein said solid (nonporous) metal-carbide microspheres are selected from the group consisting of microspheres of carbides of tungsten, thallium, niobium and vanadium.

3. A process according to claim 1, wherein said ultrafine comminution of said mineral and organic powders comprises comminution in aqueous media and in nonaqueous media.

4. A process according to claim 1, wherein said ultrafine comminution of said mineral and organic powders comprises a single or multiple comminution stages.

5. A process according to claim 1, wherein said ball-milling device is a rotary ball mill.

6. A process according to claim 1, wherein said ball-milling device is an agitated ball mill (attritor).

7. A process according to claim 1, wherein said ball-milling device is a vibrating ball mill.

8. A process according to claim 1, wherein said ball milling device is pulsating ball mill.