Solution for Foundry Industry

    With the increasing requirements of users on the quality of ingot, higher requirements are put forward for the purity of molten steel, especially for special steels such as superalloy and master alloy. It is generally believed that oxygen, sulfur, phosphorus, hydrogen, nitrogen and non-metallic inclusions are the main factors affecting the purity of special alloy steel, so the refractory materials used in steelmaking are directly related to the purity of molten steel. Flow steel brick is usually used in the process of molten steel casting, because it is in direct contact with molten metal, and is subject to erosion and chemical action, which seriously affects the quality of castings.

    The reasons that affect the purity of molten steel are mainly divided into two categories: one is caused by the process of steelmaking, such as melting and deoxidation, and the other is caused by refractory materials used in steelmaking, such as flow steel bricks, water mouth bricks, funnel bricks, etc. Molten steel bricks are usually used in the bottom casting method. When molten steel flows from ladle to ingot mold, it must pass through molten steel bricks. Due to the high temperature of molten steel, it will have an impact on the convection steel bricks, which will cause the local fall off of the structure of molten steel bricks. Therefore, the selection of bricks of different materials plays a very important role in the cleanliness and defects of molten steel. The molten steel flowing out of the ladle water mouth enters the ingot mold through the middle injection pipe brick, the center separation steel brick, the cross runner steel brick and the flow steel tail brick in turn.

      The structure of the casting steel system designed by our company for casting ingot is reasonable, especially the opposite end of the connection between the flow steel tailbrick and the resistance material of the cross runner is provided with a certain length of the flow blocking chamber, so as to store part of the drainage sand or non-metallic inclusions generated by burning oxygen during the pouring process, reducing the amount of drainage sand and non-metallic inclusions into the mold. Reduce the risk of unqualified ingot inspection due to non-metallic inclusions produced by drainage sand and oxygen burning. At the same time, the material of this series of products is made of South African andalusite, which has excellent seismic stability and corrosion resistance, preventing secondary pollution of molten steel and improving the qualification rate of ingot.