The continuous development of the milling industry and the increasing use of additives. Sampling flour on the market, found that there are many cases of excessive additives. And some of the magnetic metal material in the flour was found to exceed the standard by the magnetic metal material analyzer, resulting in an increase in substandard products.
In view of the above situation, we conducted an experimental study on how to truly measure the metal content in wheat flour. Through several tests, it was found that the use of dual magnetic method that combines the magnetic metal detector and magnet attraction method is simple, effective, scientific and accurate. The specific method is based on the magnetic metal detector, magnets are used to aspirate magnetic metal, so that it is separated from the additives, and then calculate the magnetic metal content.
Wheat flour has additives in different degrees. The magnetic metal material analyzer used to determine the content of magnetic metal in wheat flour has a high result. 40% of the qualified products exceed the standards and become unqualified products. From the measurement principle and operation method analysis: when using this method to determine the magnetic metal material in wheat flour, they are swept into the crucible along with the magnetic metal material on the raft, and rinsed with carbon tetraoxide. Due to the higher density of sand and additives They cannot float on the surface of the carbon tetrachloride, but sink with the magnetic metal at the bottom of the crucible. The result of the measurement is not true and is obviously large.
When magnetic attraction method was used to determine the magnetic metal in wheat flour, adding additives to wheat flour had no significant effect on the test results, but the test results were obviously low. The result of the magnet attraction method was too low, and the non-conformance of the magnetic metal material exceeding the standard was not measured, and the results of the double test of this law were quite different. The main reason for this phenomenon is that when a horseshoe-shaped magnet is used for sampling, it is likely to be missing, and the flow is not even and complete without a magnetic metal detector. In addition, the magnetic metal material that is adsorbed on the magnet is not easily brushed off and will remain on the magnet, resulting in a low result and making some defective products into qualified products.
The use of a magnetic metal detector or magnetic attraction method to determine the content of magnetic metal in wheat flour has disadvantages. Practice has proved that using magnetic double magnetic method to determine the content of the two methods to take full advantage of the advantages of the above two methods, to overcome their drawbacks, especially when using magnets to attract magnetic metal material, covered with a layer of paper, as long as the bottom off the magnet, When it is flicked, magnetic metal can be obtained, which solves the problem that magnetic metal cannot be easily brushed off from the magnet.
In view of the above situation, we conducted an experimental study on how to truly measure the metal content in wheat flour. Through several tests, it was found that the use of dual magnetic method that combines the magnetic metal detector and magnet attraction method is simple, effective, scientific and accurate. The specific method is based on the magnetic metal detector, magnets are used to aspirate magnetic metal, so that it is separated from the additives, and then calculate the magnetic metal content.
Wheat flour has additives in different degrees. The magnetic metal material analyzer used to determine the content of magnetic metal in wheat flour has a high result. 40% of the qualified products exceed the standards and become unqualified products. From the measurement principle and operation method analysis: when using this method to determine the magnetic metal material in wheat flour, they are swept into the crucible along with the magnetic metal material on the raft, and rinsed with carbon tetraoxide. Due to the higher density of sand and additives They cannot float on the surface of the carbon tetrachloride, but sink with the magnetic metal at the bottom of the crucible. The result of the measurement is not true and is obviously large.
When magnetic attraction method was used to determine the magnetic metal in wheat flour, adding additives to wheat flour had no significant effect on the test results, but the test results were obviously low. The result of the magnet attraction method was too low, and the non-conformance of the magnetic metal material exceeding the standard was not measured, and the results of the double test of this law were quite different. The main reason for this phenomenon is that when a horseshoe-shaped magnet is used for sampling, it is likely to be missing, and the flow is not even and complete without a magnetic metal detector. In addition, the magnetic metal material that is adsorbed on the magnet is not easily brushed off and will remain on the magnet, resulting in a low result and making some defective products into qualified products.
The use of a magnetic metal detector or magnetic attraction method to determine the content of magnetic metal in wheat flour has disadvantages. Practice has proved that using magnetic double magnetic method to determine the content of the two methods to take full advantage of the advantages of the above two methods, to overcome their drawbacks, especially when using magnets to attract magnetic metal material, covered with a layer of paper, as long as the bottom off the magnet, When it is flicked, magnetic metal can be obtained, which solves the problem that magnetic metal cannot be easily brushed off from the magnet.
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