FR2595619A1 - PRESS FOR COMPRESSING A FEED LOAD - Google Patents

Abstract

THE INVENTION RELATES TO A PRESS FOR COMPRESSING A FEEDING LOAD. IT INCLUDES A CHAMBER SHAPED OF FIXED WALL SEGMENTS 22 WHICH ARE SPACED LONGITUDINALLY AROUND A LONGITUDINAL AXIS 23 AND BETWEEN WHICH ARE GUIDED AND RECEIVED BY SEGMENTS 25 THAT CAN MOVE RADIALLY INTO THE INTERIOR. THESE SEGMENTS 22, 25 TOGETHER FORM A CHAMBER IN WHICH THE LOAD IS COMPRESSED BY BEING SUBJECT TO MULTIPLE SHEAR FORCES TO FORM A BRIQUETTE 21. FIELD OF APPLICATION: PRODUCTION OF COAL BRIQUETTES, ETC.

Description

The present invention relates to bricklaying

  coal without the use of a binder.

  The present invention relates more particularly to

  the briquetting of coal by means of presses.

  Presses have been proposed that use effective and shear stresses to cause the coal particles to bond to one another to form a briquette. However, these tests have not been completely satisfactory and require the application of considerable force and

  the use of high temperatures.

  The object of the present invention is to substantially eliminate or mitigate the above disadvantages. The invention relates to a press for use in compressing a feedstock, said press having a chamber within which the feedstock is placed and compressed by the application of shear forces to that load. the chamber being closed by at least three wall elements having surfaces defining said chamber, at least two of said wall elements being movable to compress the feedstock, the wall surfaces being not perpendicular two by two but each wall surface is inclined

  relative to the adjacent wall surfaces

  to form with them an acute angle.

  There is further disclosed a press for use in the briquetting of coal, this press comprising

  a chamber intended to receive particles of char-

  good and comprising several walls closing said chamber

  wherein said walls comprise two opposite end walls which apply an axial force to the particles and at least two movable walls in a direction perpendicular to said axial force to subject

  the particles at shear forces.

  The invention will be described in more detail

  with reference to the accompanying drawings by way of example

  and in which: FIG. 1 is a schematic perspective view of a press intended to compress a load;

  supply by applying shear forces

  is lying; Figure 2 is a schematic longitudinal section of a press of the prior art; Figure 3 is an end schematic exploded view of a press according to the invention; and FIG. 4 is a diagrammatic view in

  perspective of the press in Figure 2 and a

made by this press.

  Figure 1 schematically shows a press 30 within which a feedstock, such as coal, is placed to be compressed by the application of shear forces to that load. The press 30 has at least three wall elements, but advantageously

  five wall elements as shown in Figure 1.

  The press 30 of FIG. 1 has wall surfaces 31 to 35 which are of a generally planar configuration. The wall surfaces 31 to 35 are arranged not to be perpendicular to each other in pairs. More particularly, each wall surface forms an acute angle with each of the surfaces adjacent thereto. It is furthermore preferable,

  in the case of presses with three or more

  that two surfaces are parallel.

  In FIG. 1, the angle ABC is not equal to the angle BAC, the angle DFE is not equal to the angle DEF, the angle CZX is not equal to the angle DWX, the angle CAE is not equal to the angle CBF, while the angle

2595-619

  DBF is not equal to the angle DEA. In addition, the lines AB and EF are not parallel and the lines BF and

  AE are also not parallel.

  The preferred embodiment described above, according to the invention, reduces as much as possible the opposing forces and the forces coming together at normal angles, which produce a springback and sliding surfaces to

the compression.

  In FIG. 2, it is represented diagrammatically

  a press 10 for the manufacture of a

  11. The press 10 comprises a hollow body 12 in which two pistons 13 can slide.

  axially close to one another to

  apply forces to the material to form the briquette 11. The pistons 13 have inclined faces 14

  in order to apply shear forces to the material.

  Reference will now be made to FIGS. 3 and 4 which represent a preferred embodiment

  of the invention. Figures 3 and 4 illustrate schemati-

  a press 20 for the manufacture of a

  21. The press 20 has four fixed segments 22 which are spaced longitudinally about the longitudinal axis 23. The elements 22 have sides

  24 converging radially inwards, which guides

  tooth and receive movable shear elements

  in a direction normal to the axis 23. Pistons then close each end of the chamber

  formed by the elements 22 and 25.

  In the operation of the press 20 described above, the powdered charcoal is placed in the press cavity and an axial force is applied thereto. Next, the shear elements are moved to apply multivariate oriented shear forces to the powder material. It is furthermore advantageous that the material

  be subjected to ultrasonic or

sonic during compression.

  It goes without saying that many modifications can be made to the press described and

  felt without departing from the scope of the invention.

Claims (8)

  1. Press to be used for the compression of a feedstock, characterized in that it comprises a chamber within which the feedstock is to be placed and compressed by the application of force forces. shearing at this load, the chamber being closed by at least three wall elements having surfaces (31-35) defining said chamber, at least two of said wall elements being movable so as to compress the feedstock, and the surfaces walls not being perpendicular two by two and each wall surface being inclined   at an acute angle to adjacent wall Centes.   Press according to claim 1, characterized   terized in that the forces produced by the surfaces   do not meet at right angles and are not opposed   Sees. 3. Press for the briquetting of coal, characterized in that it comprises a chamber for receiving carbon particles and several walls closing said chamber, which walls comprise two opposite end walls which apply an axial force to the particles, and at least two moving walls in a direction perpendicular to said axial force   in order to subject the particles to shear forces LEMENT.   4. Press according to claim 3, characterized   in that the chamber is of global configuration.   cylindrical and is closed at each end   by the extreme walls and, at its periphery, by   sieur segments (22, 25) extending longitudinally nally to said chamber.   Press according to claim 4, characterized   characterized in that the wall elements comprise a   first set of wall segments (22) which are globally   fixed and a second set of wall segments (25)   which are mobile to decrease the volume of the chamber.   Press according to claim 5, characterized   characterized in that the wall segments of the second set are interposed with the wall segments of the first set. 7. P r e s s s e l o n the claim. 4, characterized in that the walls   extremes have extreme faces that are inclined   relative to the direction (23) of said axial force.   Press according to claim 7, characterized   characterized in that the end faces are generally parallel and inclined at an angle of about 45 per square relative to said axial force.