RU2001387C1 - Method of checking materials for proper mixing - Google Patents

Description

The solution has common features with the prototype:

- the indicator is introduced into the mixed mass;

- carry out the mixing;

- carry out a qualitative assessment of the quality of the mixture.

The proposed technical solution differs from the prototype by new features and a new order of their implementation:

- use as an indicator a water-soluble additive in the form of a dispersed substance;

- remove the indicator from the surface of the test material by dissolving it in water;

-performing the voids formed by the powdery finely divided substance;

- the thermal conductivity of the powdery substance is higher than the thermal conductivity of the test material;

-exercise a thermal effect on the powdery substance, which filled the voids on the surface of the test material;

- registering the intensity of infrared radiation with a powdery substance;

- The quality of the mix is judged by the intensity of the infrared radiation.

From the above list of features and the achievement of the goal, it can be clearly seen that the claimed technical solution is a new set of features, as a combination of new features and a new technical property.

The method is implemented as follows.

Polymer materials (polyethylene, polystyrene, etc.) were processed on a screw extruder in an amount of 50 kg. During processing, table salt was used as an indicator (any dispersed substance can be used if it was dissolved in water) in an amount of 50 g. The indicator was introduced into the extruder hopper. At the exit of the extrusion head, the processed material was obtained in the form of a strip 3 mm thick. Processing was carried out for 20, 40 and 60 minutes. The width of the strip is 100 mm. Then pieces were cut from a strip 100 mm long. Pieces of material were placed in warm running water and the salt was dissolved from the surface of the cut pieces. After dissolution on the surface of the selected pieces (samples),

emptiness. Then, on the surface of the selected pieces, after dissolving the salt, they poured

5 finely divided fraction of the powder. Then, a fine powder was uniformly distributed over the surface of the pieces with a soft brush and the voids were filled with powder. Selected pieces are considered prepared for testing if all the voids of the test pieces are filled with powder to the level of the plane of the pieces. After that, the prepared samples were placed in an oven (chamber) with a temperature of 80 ° C and held for 50 s. We set up an AGA thermal imager.

15 Then the samples were removed from the cabinet and mounted on a tripod. A screen with a 5 mm hole was mounted above the test sample, and the thermal imager was directed to the side of the hole in the screen. The test samples were moved uniformly over the surface of the tripod and the degree of infrared radiation was recorded. Then the sample was shifted by 1 cm, and again moving uniformly, the radiation intensity was determined 5. Then, statistical analysis of the results of the study was performed and the average intensity of the surface of the sample was determined. Conducted statistical processing of the results. Then, the radiation intensity of the surfaces of all samples was compared with each other and a judgment was made on the quality of the mixture. When comparing the quality of samples with a processing time of 20 min, data on the value

5 emissions diverged by 22%, with a processing time of 40 minutes - by 11%, and with a processing time of 60 minutes - by 2.5%. From this we can conclude that the processing time of the material 60 min is quite

0 sufficient to obtain a homogeneous mixture. The discrepancy of 2.5% is explained by the error of the procedure itself.

Using this method, the quality of mixing materials with low thermal conductivity can be investigated.

Thus, the proposed technical solution provides a simpler study of the quality of mixing in comparison with the prototype and an increase in safety, i.e. the method is implemented without the use of radioactive isotopes.

(56) Sterbachek. Mixing in the chemical industry. Ed. Chemistry-5 eka literature L. 1962, p. 249.

USSR copyright certificate No. 347070, 01 F3 / 18. 1971.

7 20013878

Claims (2)

1. METHOD OF DETERMINING THE QUALITY OF MIXING Above the thermal conductivity of the investigated MATERIALS, including introducing into the material, then the heat-insulating mass of the indicator is carried out, mixing the effect on the powdery qualitative assessment of the inhomogeneity of the mixture-5 material, then infrared is recorded, characterized in that water solubility with a powdery substance is used as the other radiation of individual sections of the surface of the indicator, and the substance that is removed from the surface as a mixture is judged by the intensity o- test material through its sol-sti infrared radiation rhenium in water, then filled with the generators 10 2. The method according to claim 1, characterized in that the voids are powdery, such as a powdery substance, the thermal conductivity of which is used by aluminum alloys.