Multi-deck air jigging machine

• US 8,800,776 B2
• Filed: 04/14/2011
• Issued: 08/12/2014
• Est. Priority Date: 04/15/2010
• Status: Active Grant

• Current Assignee: Allmineral Aufbereitungstechnik GmbH & Co. KG
• Original Assignee: Allmineral Aufbereitungstechnik GmbH & Co. KG
• Inventors: Linnhoff, Hans-Josef
• Primary Examiner(s): MATTHEWS, TERRELL HOWARD
• Application Number:
  US13/641,462
• Publication Number:
  US 20130032513A1
• Time in Patent Office: 1,216 Days
• Field of Search: 209/20, 209/21, 209/467, 209/488, 209/490
• US Class Current: 209/21
• CPC Class Codes: B03B 4/005 the currents being pulsating, e.g. pneumatic jigs; combination of continuous and pulsating currents
• CPC Class Codes: B03B 4/02 using swinging or shaking tables
• CPC Class Codes: B03B 4/065 having inclined portions
• CPC Class Codes: B07B 2201/04 Multiple deck screening devices comprising one or more superimposed screens
• CPC Class Codes: B07B 4/08 while the mixtures are supported by sieves, screens, or like mechanical elements

Abstract

An air jigging machine for dry processing of raw materials, an air supply conduit for supplying working air to an air funnel, and having a pulsing valve. At least two jigging-material carriers for receiving material from a material-feeding mechanism are configured to consecutively receive therethrough working air from the air funnel and to separate the material into heavy and light material layers. The jigging-material carriers are disposed one above the other and are spaced apart. A wall encloses this intermediate space. At least one bypass airline branches off from the air supply conduit downstream of the pulsing valve, bypasses the lower jigging-material carrier, and communicates with the intermediate space for supplying an additional working airflow thereto. Respective discharge devices are provided for the jigging-material carriers for the material layered thereon during a jigging process.

Claims

1. An air jigging machine (10) for dry processing of raw materials (17), comprising:

a material-feeding mechanism (11, 12);

an air funnel (28);

an air supply conduit (32) for supplying working air (35) to said air funnel (28), wherein a pulsing valve (34) is disposed in said air supply conduit (32);

at least two jigging-material carriers (15,16) for receiving material (17) from said material-feeding mechanism (11, 12), wherein said jigging-material carriers (15, 16) are configured to consecutively receive therethrough working air (35) from said air funnel (28) and to separate the material (17) into heavy material (18) and light material (19) layers, and wherein said jigging-material carriers (15, 16) are disposed one above the other and are jigging from one another by an intermediate space;

a wall (40) for enclosing said intermediate space between said jigging-material carriers (15,16);

at least one bypass airline (50a, 50b) that branches off from said air supply conduit (32) downstream of said pulsing valve (34), bypasses a lower one (16) of said jigging-material carriers (15, 16), and communicates with said intermediate space for supplying an additional working air flow into said intermediate space between said jigging-material carriers (15, 16); and

a respective discharge device (20) for each of said jigging-material carriers (15, 16) for said material (17) layered during a jigging process.

2. An air jigging machine according to claim 1, which further comprises an air distributor (51) mounted on said wall (40), wherein said at least one bypass line (50a, 50b) is disposed externally on a housing of said air jigging machine and is connected to said air distributor (51), and wherein nozzle openings (52) are disposed in said wall (40) and connect said air distributor (51) with said intermediate space between said jigging-material carriers (15, 16).

3. An air jigging machine according to claim 1, wherein a control valve (53) is inserted into said at least one bypass air line (50a, 50b) and is configured to regulate a quantity of air that flows through said at least one bypass air line (50a, 50b).

4. An air jigging machine according to claim 1, wherein regulatable discharge openings are disposed in said wall (40) that encloses said intermediate space between said jigging-material carriers (15, 16).

5. An air jigging machine according to claim 1, wherein for establishing respectively identical jigging conditions for said jigging-material carriers (15, 16) a layer thickness of the heavy material (18) layered upon an upper one (15) of said jigging-material carriers (15, 16), and/or a jigging surface of said upper jigging-material carrier (15), is adapted to a pressure loss of the air stream that is connected to a flow of air through said lower jigging-material carrier (16).

6. An air jigging machine according to claim 4, wherein for establishing different layer thicknesses of the jigging material layered on said jigging-material carriers (15, 16), a plurality of said bypass air lines (50a, 50b) and/or a plurality of said discharge openings are provided for said jigging-material carriers (15, 16).

7. An air jigging machine according to claim 1, wherein said air funnel (28) is comprised of two chambers (30, 31) that are jigging from one another and that in a direction of conveyance of said material (17) over said jigging-material carriers (15, 16), are disposed successively, and which includes a common air supply conduit (32) that is guided into both of said chambers (30, 31), wherein said air supply conduit (32) is provided with at least one respective outlet (33) in the region of each of said chambers (30, 31) for working air that is to be supplied via said air supply conduit.

8. An air jigging machine according to claim 7, wherein said outlets (33) of said air supply conduit (32) have variable cross-sectional areas.

9. An air jigging machine according to claim 7, wherein a central blower si connected to said air supply conduit (32) for producing an air stream that is to be introduced by said air supply conduit into said air funnel (28).

10. An air jigging machine according to claim 7, wherein in conformity with said chambers (30, 31) of said air funnel (28), said intermediate space between said jigging-material carriers (15, 16) is divided into two chambers (30a, 31a) by means of a jigging flap (41) that is disposed between an upper one of said jigging-material carriers (15) and said lower jigging-material carrier (16).

11. An air jigging machine according to claim 10, wherein each of said chambers (30a, 31a) of said intermediate space is respectively connected to a separate bypass air line (50a, 50b).

12. An air jigging machine according to claim 1, which includes a drive mechanism (36) for causing said jigging-material carriers (15, 16) to vibrate.

13. An air jigging machine according to claim 1, which includes a central material-feeding mechanism (11, 12) for said jigging-material carriers (15, 16), and wherein said material-feeding mechanism provides a respective partial material stream for each of said jigging-material carriers (15, 16).

14. An air jigging machine according to claim 1, wherein said material-feeding mechanism (11, 12) is associated with an upper one of said jigging-material carriers (15) for supplying said material (17) that is to be processed thereto, and wherein said discharge device (20) for said heavy material (18) layered on said upper jigging-material carrier (15) is connected to said lower jigging-material carrier (16) as a material-feeding device (38) for said lower jigging-material carrier (16).

15. An air jigging machine according to claim 14, wherein said upper and lower jigging-material carriers (15, 16) are disposed at angles relative to one another that extend in opposite directions.

16. An air jigging machine according to claim 1, wherein three or more jigging-material carriers are disposed one above the other.