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Problems associated with steel rods in the current market: 1. High wear: Many manufacturers use hot-rolled round bars, whose hardness is around 18-20 HRC. Since the hardness of these hot-rolled round bars remains at 18-20 HRC, and the hardness of the grinding rods used in grinders is lower compared to the high-hardness components such as grinder linings, this results in very high consumption of steel rods. It also leads to increased workload and higher costs in the magnetic separation process, and can even affect product quality. 2. When hot-rolled round bars are used, it is easy for their ends to become pointed. The sharpness at the ends of the steel bars is caused by various factors; primarily, the ends of the bars have greater contact with the material and cover a larger area compared to the middle section, which results in longer grinding times at those ends. Once there is a noticeable difference between the condition of the ends and the middle section, such bars are considered “failed” as they can no longer perform their grinding function effectively. The main reason for this is that the hardness of the bars is too low. The working principle of these bars relies on friction between the surfaces of the bars; when the ends become pointed, the bars lose their ability to function properly, reducing the length over which friction occurs and leading to a decrease in production volume and uneven particle sizes. 3. Broken rod: The main reason is porosity within the material. The temperature at which steel billets are cast in steel mills, along with the drawing speed, are the main reasons for porosity within the billets. Smaller steel mills struggle to control these factors properly; only very large steel mills are able to meet the technical requirements regarding the internal structure of the billets. This is especially true for steel bars of large diameter. Due to limitations in equipment and technical capabilities, most steel mills can indeed shape the billets, but the compression ratio is low and the grain structure is coarse, meaning the structure is not dense enough. Furthermore, since the internal stress in the round steel remains unchanged upon leaving the factory, it is necessary to relieve this internal stress in order to meet the requirements of the material used for grinding rods and to prevent breakage. Therefore, it is essential to choose a reputable special steel manufacturer in order to resolve these issues. 4. Bent rod: The main reason for a bent rod is its low hardness; it is relatively soft, and thus it easily bends when subjected to internal forces or other external pressures inside the grinder. Once one of the rods bends, it disrupts the parallel arrangement of the steel rods inside the mill (the rods run parallel to each other within the mill, and as material passes through the gaps between them, it is ground into small particles or powder). In mild cases, this disruption leads to reduced production efficiency of the mill; in severe cases, the rods may be thrown out of the mill, posing a threat to the safety of the workers and causing damage to the mill as well as other production equipment, resulting in downtime for repairs. 5. The purity of the product is affected; due to the low wear resistance of the steel rods, an excessive amount of iron ends up in the product, which increases the costs associated with magnetic separation. This also **reduces the purity of the product, thereby lowering its quality**.