The advantages of cold-pressed pellet production and manufacturing include simple technical equipment, good calcination efficiency, low energy consumption, minimal investment, short infrastructure project cycles, and excellent ecological and environmental protection standards. As a result, the cold soil pellet method is increasingly valued as a specialized capability for agglomerating this type of iron ore powder.
However, these pellets currently have significant shortcomings: first, the cold compressive strength of the formed pellets is too low, with the compressive strength of a single pellet only around 1000N. Second, the thermal compressive strength of cold-pressed pellets is too low; they crack and delaminate at temperatures as low as 400-800°C! Due to the low cold and thermal compressive strength, they can only be used in small blast furnaces with unsatisfactory results. The reason for the low cold and thermal compressive strength of cold-pressed pellets is the inadequate capability of the binder! Wandeng brand binder for cold-pressed pellets is an innovative composite binder that allows for complementary effects among the ingredients, thereby enhancing the binder's versatility. Its benefits are reflected in the following key aspects: 1. High forming rate: The forming rate and productivity typically reach 95%, and can be as high as around 98%; if producing carbon-containing pellets, the forming rate and productivity are also above 93-96%. 2. High compressive strength: The cold compressive strength usually reaches 1800-2000N per pellet, with highs of 2200N-2700N per pellet, and can be adjusted to meet customer requirements, whether slightly lower or higher; thermal compressive strength typically ranges from 600N to 1000N, but can also be higher. 3. Eco-friendly and waterproof: The binder is non-toxic, pollution-free, does not reduce iron grade, and does not add harmful slag; its production process is simple, and it offers certain moisture and water resistance. 4. Wide adaptability: It is suitable for processing waste in beneficiation plants and can also be used for pelletizing iron concentrate; it is applicable for both large and medium-scale planned production and can meet the requirements for fracture toughness and high-temperature compressive strength in small to medium-sized blast furnaces.