Sampling method for testing steel materials before furnace by steel analyzer 1. The steel material is sampled at the iron outlet before the furnace analysis by the chemical element analyzer. A long-handled sampling spoon is used to scoop the molten iron. After preheating the sampling spoon, the molten iron is re-scooped out and poured into the sand mold. In the case of a large blast furnace volume, in order to obtain reliable results, one-time tapping can be divided into the first, middle, and last three stages, and each time in the middle of each stage is taken as a sample for inspection. 2. When sampling in a hot metal ladle or mixed iron truck, one sample should be taken when the molten iron is filled to 1/2 or more strictly. One sample should be taken at each midpoint of the initial, middle and final stages of the molten iron. 3. When using a cast iron machine to produce commercial cast iron, taking into account the changes in the composition of the molten iron from the furnace to the cast iron plant, you should choose to sample at the middle of the pouring from the ladle into the cast iron machine. 4. Sampling from the molten steel in the steel-making furnace, generally use a sampling spoon to scoop out the molten steel from the furnace, remove the scum on the surface, and then pour it into the metal casting mold. After solidification, it is sent as a sample for inspection. In order to prevent the content of easily oxidized elements in the steel from changing when the molten steel is in contact with the air, some adopt immersion casting molds or sampling guns to take and send samples in the furnace. 5. When samples are taken from cold pig iron blocks and sent for inspection, three or more iron blocks from a batch of iron blocks are randomly taken as samples for inspection. When the total amount of a batch exceeds 30T, an iron block is added every time it exceeds 10T. Each batch of alcohol delivery products consists of 3-7 iron pieces. When the iron block can be divided into two halves, only half of them are prepared for analysis after separation. 6. The chemical element analyzer can't send the billet for testing. The chemical composition is determined by sampling analysis in the ladle. At this time, there are various defects (precipitation, shrinkage, segregation, non-metallic inclusions and cracks) in the steel ingot. For steel billets used in rolling mills, when raw material analysis is to be carried out, the steel billet samples can be cut from the 1/5 height of the raw steel ingot in a direction perpendicular to the rolling direction. 7. Steel products are generally not analyzed. Sampling can be done by cutting, but more should be taken to facilitate sample preparation. Weihai Tong Park Arts & Crafts Co.,Ltd , https://www.whtongpark.com