Regarding the non-metallic mineral whiteness test, how to make the results more accurate and reliable?

Whiteness mainly refers to the degree of whiteness of the object. The higher the whiteness value of the object, the greater the degree of whiteness. White has a unique property of high light reflectance and low color saturation. Because people's evaluation of white standards is different, the results of the whiteness test will also be different. Among them, the main factors affecting the non-metallic mineral whiteness test can be analyzed from three aspects, including the mine address, the particle size of the mineral powder and the water content of the non-metallic mineral.

1.1 Mine Address
In different mining areas, the purity of non-metallic minerals will also vary. Therefore, the non-metallic minerals will have different whiteness after processing. In non-metallic mining and exporting, we should choose ore with high purity. The ore type should be chosen in neutral color. Only in this way can we ensure the whiteness of the ore after reprocessing. In addition, the ore processing must pay attention to the same color ore to be processed together, the ore color should be strictly classified , processed according to the classification, can not be mixed with different shades of ore processing, the only way to ensure the ore Purity, which in turn increases the ore whiteness value.

1.2 Mineral powder particle size
Under normal circumstances, the higher the processing degree of ore, the finer the processing, the higher the corresponding whiteness value . However, in the actual processing process, the degree of processing ore is also strictly regulated. After the ore processing level reaches the standard, the whiteness value will not increase any more, or the whiteness value will be less variable. At the same time, further processing will increase the workload and reduce the work efficiency, which is not conducive to saving processing costs.

1.3 Water content of non-metallic minerals
The water content of the soil in different mining areas will also be different, which will result in different levels of ore water content, and the ore water content is also one of the main factors affecting the whiteness value. Because the higher the water content of the ore, the lower the whiteness, and the whiteness can be effectively improved by appropriately reducing the water content of the ore . Therefore, in ore processing, it is necessary to use scientific and effective methods to reduce the water content of the ore. Only in this way can the processed ore have a higher whiteness value, thereby obtaining a greater degree of benefit in the non-metallic mineral export.

At this stage, the measurement of whiteness in the building materials, plastics, non-metallic mineral products and other industries mainly adopts “ blue light whiteness ”, and the relevant standards are also strictly regulated. It is designed according to the standards of the international standardization organization and is measured on the whiteness meter. The blue light reflectance is the whiteness value. Non-metallic minerals can use the "dry Heights whiteness" and "Hunter whiteness" and in international trade or other specific trade publicity calculated. The advantage of this method is that it is simple and easy to implement, has a wide range of applications, and the measuring instrument is cheap and low in cost. Therefore, it has been widely used in the measurement of non-metallic mineral whiteness.
On the other hand, in the non-metallic mineral trade, different formulas are used to calculate according to the actual situation, which will result in different whiteness measurement results of the same batch of products. For example, a certain batch of non-metallic minerals is sold to a certain country, non-metallic mineral manufacturers determine the whiteness value is 90.4, the mineral products are sold to the country, and the blue lightness is 90, and the blue light whiteness is determined by the relevant unit. The manufacturer's test report found that the manufacturer reported Hunter Whiteness, so the blue light whiteness 94 minerals only sold the price of blue light whiteness 90. In this trade, the exporting country's economic loss is huge.

  3.2 Photoelectric whiteness meter

Photoelectric whiteness meter has grades, generally divided into first-class and second-class. The manufacturers are all over the country. The quality and price of the products are not uniform. Each photoelectric white meter will produce different results for whiteness measurement. influences. Therefore, in the non-metallic mineral whiteness test, the photoelectric whiteness meter should be selected, and the instrument must be strictly screened according to the actual situation. The photoelectric whiteness meter with high precision is selected and applied to the photoelectric whiteness meter. The whiteness test can guarantee the accuracy of the results.

In order to ensure the accuracy of the non-metallic mineral whiteness test results, a whiteness meter can generally be selected. The price of the whiteness meter is in the range of 5000-9000, and the whiteness meter has a certain degree of precision. It is a good product to guarantee the quality of whiteness measurement. At the same time, this whiteness meter can also provide many practical whiteness calculation formulas. In addition, when selecting the whiteness meter, you should also choose a whiteness meter with chromaticity coordinates . This whiteness meter can measure the corresponding color standard of minerals and has positive effect on the smooth progress of mineral processing . significance.
When selecting a standard whiteboard, the national standard whiteness sample should be used as the standard whiteboard. Only in this way can the whiteness result be confused. Among them, the whiteness meter and the standard whiteboard should be sent once a year to ensure the accuracy and reliability of the corresponding standards.
In summary, the whiteness test plays a very important role in measuring the quality of non-metallic mineral products. Therefore, it is necessary to conduct detailed analysis of relevant factors, strictly follow the whiteness measurement standard, and select scientific test methods and instruments to perform non- The metal whiteness test can only improve the accuracy and reliability of the test results to the fullest extent, and provide sufficient guarantee for the smooth trade of non-metallic mineral products.