1. Model:WTY-W15
2. Product name:pellet compression testing machine
3. Introduction and application of testing machine
l Adopting precise auto control and data acquisition system to
realize fully digital adjustment to data acquisition and control
process. It can test max. bearing tensile, compression, tensile
strength, deformation, elongation and other technical
specifications;
l After test, the above parameters can be calculated automatically
through main controller according to the test parameters, which are
set before test and meantime display the corresponding test
results. All test parameters can be saved and inquired after test,
also can be connected with printer to print test reports.
4. Main functions of testing machine:
l with function of automatic return to original position,
intelligently, efficiently, quickly;
l with limit protection function of any working position and
overvoltage, over current protection functions, reliable, safe;
l With strong test data, which can save, inquire and retrieve test
data anytime.
l with many control modes of constant speed control to force,
stress, deformation, strain, stroke, load, elongation, displacement
and low cycle and user self-programming control;
l Switch among many test curves: stress-strain curve, load-time
curve, deformation-time curve, load-displacement curve. Partial
enlargement, overlap and comparison.
5. Introductions of test method
Definition
Crushing strength: the applied maximum compressive load at which an
iron ore pellet is broken completely, and which is expressed as the
mean value of all measurements of test sample.
Taking of sample
The test sample (test pieces) for determining the crushing strength
shall by obtained at random, for example by the use of a random
selection plate, on about 1kg of the sample for physical testing.
The test sample shall be oven dried at 105±5℃ and cooled to room
temperature before testing.
Number of test pieces (iron ore pellets)
Sixty or more test pieces, or as agreed upon between the interested
parties, shall be tested for each sample.
Test procedure
Place a test piece (single pellet) at the approximate centre of the
surface-hardened portion of the lower platen. Apply the load at a
constant rate between 10 and 20mm/min throughout the test period.
Record the maximum load, at which the test piece undergoes complete
breakage, to at least one decimal place, in decanewtons.
Note: complete breakage is ensured by continuing to apply the load
until the platen gap has closed to 50% of the average test piece
size.
Clean the platens thoroughly before the next test piece(single
pellet) is tested.
Repeat the procedure on the remaining test pieces.
6. Main technical specifications of testing machine:
| No. | Inspection items | Technical specifications |
| 1 | Max. load | 15KN |
| 2 | Precision class | Class 1 |
| 3 | Measuring range of load | 2%-100%FS |
| 4 | Relative error of indicating value | ±1.0% |
| 5 | Min reading value of deformation | 0.01mm |
| 5 | Resolution of test force | 1/300000F.S (with constant resolution within the whole stroke) |
| 6 | Adjusting range of control rate of load | 0.005%-5%FS/s |
| 7 | Adjusting range of deformation rate | 0.005-5%FS/s |
| 8 | Control precision of deformation rate | When rate<0.05%FS/s, the precision is within ±1% of setting
value; When rate ≥0.005%FS/s, the precision is within ±0.5% of setting
value |
| 9 | Adjusting range of displacement rate | 0.01-500mm/min |
| 10 | Control precision of displacement rate | Within 0.2% of setting value |
| 11 | Effective test span | 360mm |
| 12 | Effective compression space | 400mm |
| 13 | Control mode | Computer |
| 14 | Power supply | 220V, 50Hz, 400W |
| 15 | Dimension of main machine | 740x350x1600mm |
| 16 | Weight of main machine | 225kg |
