Device for obtaining dust from minerals

• US 4,558,752 A
• Filed: 10/27/1980
• Issued: 12/17/1985
• Est. Priority Date: 02/26/1979
• Status: Expired due to Term

• Current Assignee: Luossavaara-Kiirunavaara AB (Government of Sweden)
• Original Assignee: Luossavaara-Kiirunavaara AB (Government of Sweden)
• Inventors: Sieglen, Rolf A., Heide, Wolfgang M., Freund, Hans-Ulrich
• Primary Examiner(s): Novosad, Stephen J.
• Assistant Examiner(s): Goodwin, M.
• Application Number:
  US06/212,729
• Time in Patent Office: 1,877 Days
• Field of Search: 175/55, 175/56, 175/66, 175/71, 175/206, 175/14, 175/18, 175/213, 299/14, 299/18, 73/864.41, 83/919, 125/6, 125/29, 125/30 R, 310/26, 51/595 S
• US Class Current: 175/207
• CPC Class Codes: G01N 1/24 Suction devices G01N1/22 - G01N1/2294 take precedence
• CPC Class Codes: G01N 1/286 involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising microtomes G01N1/06; pulverising in general B02C; mixing in general B01F
• CPC Class Codes: G01N 2001/2866 Grinding or homogeneising

Abstract

Device for obtaining dust from minerals. The device has an excitation part for mechanical ultrasonic vibrations combined with a chisel. A suction device is provided to collect the dust produced. The device serves in particular to produce dust samples rapidly for quick analysis of minerals in prospecting, in the reconnaissance and evaluation of deposits and in the mining of minerals for the purposes of quality control, monitoring and controlling the mining process.

Claims

1. Device for obtaining samples from minerals during the mining comprising an excitation part for mechanical ultrasonic vibrations combined with a chisel, which has a tip, and a suction device, the chisel being able to produce only dust of particle size of about 10 to 100 μ

m as sample for X-ray fluorescence analysis as a result of the reduction of the cross-section of the chisel in comparison to the cross-section of the excitation system and mechanically fixing the device in the nodal plane λ

/4 by a nodal mounting and the suction device having a suction nozzle to collect the dust sample produced.

2. Device as claimed in claim 1 wherein the chisel tip is calotte-shaped, conical or bevelled.

3. Device as claimed in claim 2 wherein the suction nozzle of the suction device is positioned close to the chisel tip without touching it.

4. Device as claimed in claim 3 wherein the suction nozzle concentrically surrounds the chisel tip.

5. Device as claimed in claim 4 wherein the chisel tip contains a bore hole which represents the suction nozzle of the suction device.

6. Device as claimed in claim 5 wherein a filter is provided in the air flow of the suction device to collect the dust produced.

7. Device as claimed in claim 6 wherein an impactor is used in the suction device to collect the dust produced.

8. Device as claimed in claim 1 wherein the suction nozzle of the suction device is positioned close to the chisel tip without touching it.

9. Device as claimed in claim 1, wherein the suction nozzle concentrically surrounds the chisel tip.

10. Device as claimed in claim 1 wherein the chisel tip contains a bore hole which represents the suction nozzle of the suction device.

11. Device as claimed in claim 1 wherein a filter is provided in the air flow of the suction device to collect the dust produced.

12. Device as claimed in claim 1 wherein an impactor is used in the suction device to collect the dust produced.

13. Combination comprising several individual devices as claimed in claim 1 attachd to a common mounting with a single suction device provided to collect the dust produced.