TItle：What are the types of continuous casting mold powder?
Description：According to the designed mold powder composition, the mold powder is made by selecting suitable raw materials through crushing, ball milling, mixing and other manufacturing processes.
According to the designed mold powder composition, the mold powder is made by selecting suitable raw materials through crushing, ball milling, mixing and other manufacturing processes. There are four types.
(1) Powder mold powder: It is a mechanical mixture of various powder materials. In the process of long-distance transportation, due to long-term vibration, materials of different specific gravity will segregate, and the uniform state of slag will be destroyed, which affects the stability of the use effect. At the same time, when adding slag powder to the crystallizer, the dust flew up and polluted the environment.
(2) Granular protective slag: In order to overcome the shortcomings of polluting the environment, an appropriate amount of binder is added to the powdery slag to make a granular protective slag that resembles millet grains. The production process is complicated and the cost has increased.
(3) Pre-melted mold powder: After mixing the slag-making materials, put them into a pre-melting furnace and melt them into a whole. After cooling, they are crushed and pulverized, and appropriate melting rate regulators are added to obtain pre-melted powdered mold powder. The pre-melted mold flux can be further processed into granular mold flux. The manufacturing process of pre-melted mold flux is complicated and the cost is relatively high. But the advantage is to improve the uniformity of the mold slag formation.
(4) Heat-generating mold powder: Add heat-generating agent (such as aluminum powder) to the slag powder to make it oxidize to release heat and quickly form a liquid slag layer. However, the slag formation speed of this kind of slag is not easy to control, and the cost is relatively high, so it is less used。