Method for checking magnetic impurities in powder material

Abstract

The invention discloses a method for checking magnetic impurities in a powder material. The method comprises the following steps of: (1) weighing a sample, namely weighing 300 grams of the powder material to be tested; (2) dissolving, namely fully mixing 1,500 milliliters of pure water and the powder material sample; (3) stirring, namely packaging a small plastic sample bag outside a magnetic bar of which the strength is more than 2,000 Gaussian, putting into the sample and pure water mixed solution, and fully contacting and stirring; (4) washing, namely simultaneously taking out the magnetic bar and the small plastic sample bag, washing in a large beaker with 1,000 milliliters of pure water twice, then putting into a beaker with 500 milliliters of water, independently taking out the magnetic bar, washing substances adsorbed on the surface of the small plastic sample bag in the beaker, and taking out the small plastic sample bag; and (5) judging the content of magnetic substances, namely moving the magnetic bar at the bottom of the beaker with 500 milliliters of water to observe the number, the sizes and the shapes of the magnetic substances in the beaker. The method has the advantages that: the whole detection process is low in time consumption, and low in cost; the operation is simple and feasible; and a detection and screening effect is intuitive.

Description

【Technical field】 [0001] The invention relates to a method for inspecting magnetic impurities in powder materials. 【Background technique】 [0002] At present, manufacturers of materials and users basically use chemical analysis methods to detect metal elements. This method requires a large investment in equipment, a long detection time, and it is difficult to detect when the content of metal elements is low, which lacks practicability. 【Content of invention】 [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a simple and easy physical method to quickly and intuitively detect the ferromagnetic impurities in the powder material, thereby effectively and accurately evaluating the product grade before the product is used. A method for inspecting magnetic impurities in powder materials that avoids use defects caused by ferromagnetic impurities. [0004] The purpose of the present invention is achieved like this: [0005]...

AI Technical Summary

Problems solved by technology

This method requires a large investment in equipment, a long detection time, and it is difficult to detect when the content of metal elements is low, which lacks practicability.